CN101331671A - High-frequency modulation/demodulation multiphase rectifying device - Google Patents
High-frequency modulation/demodulation multiphase rectifying device Download PDFInfo
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- CN101331671A CN101331671A CNA2006800468068A CN200680046806A CN101331671A CN 101331671 A CN101331671 A CN 101331671A CN A2006800468068 A CNA2006800468068 A CN A2006800468068A CN 200680046806 A CN200680046806 A CN 200680046806A CN 101331671 A CN101331671 A CN 101331671A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4216—Arrangements for improving power factor of AC input operating from a three-phase input voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/23—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only arranged for operation in parallel
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4283—Arrangements for improving power factor of AC input by adding a controlled rectifier in parallel to a first rectifier feeding a smoothing capacitor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
Provided is a high-frequency modulation/demodulation multiphase rectifying device comprises a direct-coupled three-phase full-wave rectifier (3) for converting a three-phase alternating current inputted from a three-phase AC power source into a direct current, and a higher harmonic correcting circuit including three sets of ring-modulated wave power generators (7a) to (7c) disposed in parallel with the direct-coupled three-phase full-wave rectifier (3), a three-phase compound winding high-frequency multiphase conversion transformer (6), and a plurality of ring-modulated wave demodulator and auxiliary three-phase full-wave rectifiers (4a) to (4c) disposed to correspond to the phase number. The high-frequency modulation/demodulation multiphase rectifying device is characterized in that the DC outputs of the higher harmonic correcting circuit are connected in parallel with the DC outputs of the direct-coupled three-phase full-wave rectifier (3) thereby to constitute a multiphase full-wave rectifier having 6n phases (n is an integer of 3 to 7) so equivalently as viewed from the side of the three-phase AC power source. As a result, there is provided the high-frequency modulation/demodulation multiphase rectifying device which can achieve size and weight reductions, a low noise, a high efficiency and a low THD at the same time.
Description
Technical field
Invention in this application relates to such high-frequency modulation/demodulation multiphase rectifying device, and it can reduce high-frequency current and the high-frequency noise that flows to the alternating current source, can realize miniaturization and and high efficiency simultaneously.
Background technology
Generally, AC power more than the number KW is being transformed in the rectifying device of dc electric power, and be used as in the canonical transformation device of the power source of slewing or various commercial plants in wherein additional DC-AC inverter, DC-DC converter etc., all have three-phase full wave rectifier circuit.
In recent years, bring problems such as interference for other power equipments by the higher harmonic current that this class electrical power electronic equipment takes place by distribution line, be that generally acknowledge in the whole world, down leading in each government bodies, also with the standard of IEC (the International Electrotechnical Commi) as guidance.
Fig. 1 illustration the interchange input current waveform of typical three-phase full-wave rectifying circuit when ohmic load is arranged and contained higher harmonic components and total harmonic distortion (THD), then this distortion value can be bigger when increasing capacity load.
In order to eliminate the public hazards of this power supply, passive, active type and the various structure methods that surpass 20 kinds such as compound have been announced over surplus in the of nearly ten year, but, pluses and minuses are arranged respectively then from cost, overload capacity, miniaturization and, efficient, higher harmonics distortion, high-frequency noise (radiated electromagnetic wave), consideration such as (MTBF) viewpoint device lifetime.
Fig. 2 illustration High Power Factor Rectifier Circuit in the past.Fig. 2-(1) to Fig. 2-(3) are the rectification circuit of so-called passive, are by transformer low-frequency ac voltage to be done heterogeneous conversion, rectification.On the rectification circuit principle of the passive shape of this class switching noise can not take place, compare with the power communication of talking about manyly recently, reliability height such as its conformability is good, overload capacity and device lifetime, but on the contrary, consider from aspects such as the volume of transformer and weight, then be difficult to small-sized and lightweight.
Fig. 2-(1) though 12 commutating phase circuit can be used to solve the problem of simple high order harmonic component, in pure resistor load, have about 14% total harmonic distortion (the following THD that all is designated as), in order to be fit to aforesaid guideline, must append filter.The phase difference variable depressor that need roughly be equivalent in addition, direct current power 1/3 power capacity.
18 commutating phase circuit (spy opens the 2003-88124 communique) as shown in Fig. 2-(2) have been proposed recently.This 18 commutating phase circuit has the THD less than 9%, and 9 phase all-waves (18 pulse) can reduce 20% with the power capacity of autotransformer and 12 comparing of usefulness mutually.At this,, can make THD≤3% by adding ratio 12 filter on a small scale of usefulness mutually.Even but in this case, owing to use low-frequency transformer, the capacity of heavy 25-40kg and 10～15 liters need be arranged also when the 10KW direct current is exported.
In Fig. 2-(3), for the fluctuation of the rectification circuit 12 phase pulse output voltages that reduce Fig. 2-(1) and the higher harmonic current of input, adopted about 5% auxiliary converter of additional output capacity to eliminate the rectification circuit of main high order harmonic component (mainly being 11 times, 13 times) method.This rectification circuit is improved to THD about 5%, but main transformer is owing to be insulated type, and weight by volume is all very big.In addition, owing to be restricted to high voltage usefulness, when being used for low pressure, also there are the other problems such as circuit structure of needs.
Fig. 2-(4) are that the power factor of known 6 pulse boosting types is improved circuit (PFC).Though the main circuit structure that this power factor is improved in the circuit is simplified, but drive circuit complexity, need the semiconductor switch of the current rating that is equivalent to average anode current value several times, even carry out the driving of electric current continuation mode, but for electric power system, still need to filter the filter of serious noise, but be difficult to design the filter that can truly have abundant attenuation big electrical power.Though used power factor improves that circuit is most to satisfy THD 5% with interior standard on the current market, improve circuit with the power factor of on-off mode and can produce very high high-frequency noise.
Fig. 2-(5) are the circuit when being used for solving high order harmonic component at the existing shop equipment receiving end place based on three-phase full wave rectifier circuit more.Sort circuit is compared with the rectification circuit of Fig. 2-(4) owing to do not bear main direct current part, even if the power capacity of active filter little also can, be reasonably at a glance, consider it also is suitable from the mixed economy aspect.But rectifier outlet side in reality, owing to there is the big electric work machine of capacity load and cogging etc., the high order harmonic component of about 30% high order harmonic component needed the active filter corresponding to the power capacity of existing equipment when generation surmounted ohmic load significantly sometimes.High frequency noise component under this situation is bigger than the middle rectification circuit in Fig. 2-(4), thereby the ratio of noise filter in the device is increased.
Fig. 2-(6) are the representative example that can reduce the active filter mode of the high-frequency noise that will take place to greatest extent, direct current is supplied with through three-phase full wave rectifier circuit, by 5 times or 7 subharmonic in the passive filter elimination high order harmonic component, and eliminate remaining high order harmonic component with the active filter of power capacity with dc output power about 6%, can improve in the circuit making THD reach 4% at least the very high frequency(VHF) noise thus in the active type power factor.
Except that the AC-DC converter of the above, also delivered the shared varied circuit structure such as economical of the switch of the simple type of the discontinuous mode of electric current and DC-DC converter, but they respectively have pluses and minuses, in fact should be according to manufacturer or user's application target, environmental selection circuit mode.In view of the above, among the research topic of the High Power Factor Rectifier Circuit that three-phase is imported, preferably can realize to solve simultaneously the rectification circuit of miniaturization and, low noise, high efficiency and low THD.
Summary of the invention
The present invention who is applied for proposes in view of the practical situation of aforementioned prior art just, and its purpose is to provide the high-frequency modulation/demodulation multiphase rectifying device that can realize miniaturization and, low noise, high efficiency and low THD simultaneously.
To achieve these goals, among the present invention who is applied for, first provides the multiphase rectifying device of such high-frequency modulation/demodulation, this device comprises: the direct coupling three-phase full wave rectifier circuit that is used for the three-phase alternating current of three-phase alternating-current supply input is transformed to direct current, and high order harmonic component correcting circuit, the three-phase full wave rectifier circuit that this correcting circuit has be arranged in parallel with this full-wave rectifier three groups annular modulating wave power generators and the heterogeneous conversion transformer of three-phase multiple winding high frequency and holds concurrently and assist corresponding to a plurality of annular modulating wave demodulator that the number of phases is provided with, described heterogeneous full-wave fairing attachment is characterised in that: it makes the direct current output of above-mentioned high order harmonic component correcting circuit be connected with the direct current output-parallel of above-mentioned direct-coupled three-phase full wave rectifier circuit, and constitute one when the three-phase alternating current source is observed the heterogeneous full-wave rectifying circuit of the 6n phase (n is 3～7 integer) of equivalence.
Second, its feature of high-frequency modulation/demodulation multiphase rectifying device that provides in the first above-mentioned invention also is: each phase primary side winding of the heterogeneous conversion transformer of three-phase multiple winding high frequency is connected with annular modulating wave power generator, secondary winding side being connected by main winding and many auxiliary windings, one group that makes the annular polyphase ac output voltage of modulating thus from heterogeneous output generation, be connected with main three-phase full wave rectifier circuit output-parallel by the direct current output that makes heterogeneous full-wave rectifier again, thereby heterogeneous full-wave rectifier just is also used as annular modulating wave demodulator and power high-order harmonic generation reduces with auxiliary three-phase full wave rectifier circuit with the ac input end that connects corresponding to these heterogeneous outputs.
The 3rd, its feature of high-frequency modulation/demodulation multiphase rectifying device that provides in above-mentioned first or second invention also is: each phase primary side winding of the heterogeneous conversion transformer of three-phase multiple winding high frequency is connected with annular modulating wave power generator, in the secondary winding side, sub-assembly by main winding and many auxiliary windings is connected, one group that makes the annular polyphase ac output voltage of modulating thus from heterogeneous output generation, make the direct current output of heterogeneous full-wave rectifier supply with direct load again with the ac input end that connects corresponding to these heterogeneous outputs, three-phase alternating-current supply and load-side are then by the heterogeneous conversion transformer insulation of high frequency, in addition, heterogeneous full-wave rectifier is also used as annular modulator/demodulator and power high-order harmonic generation reduction rectifier.
The 4th, its feature of high-frequency modulation/demodulation multiphase rectifying device that provides in above-mentioned first to the 3rd invention also is: each phase primary side winding of the heterogeneous conversion transformer of three-phase multiple winding high frequency is connected with annular modulating wave power generator, primary side is by the combination of main winding and many auxiliary windings, one group in the polyphase ac output voltage that feasible annular with centre tapped 18 phases or 30 phases is modulated from heterogeneous output generation, by connecting and the heterogeneous half-wave rectifier of these heterogeneous terminals in corresponding 18 pulses or 30 pulses, this direct current output is offered load, then can when making three-phase alternating-current supply and load insulation, reduce the high order harmonic component of power supply, then adjust VD serially by annular modulating wave power generator being carried out time ratio control.
Have again, the 5th, the high-frequency modulation/demodulation multiphase rectifying device that provides in above-mentioned first to fourth invention is characterized in that: the main rectification circuit that is made of polyphase rectifier circuit active element, on the other hand, constitute and the identical circuit arrangement of main rectification circuit by light sensitive metal oxide semiconductor switch and accessory power supply, by the output of light sensitive metal oxide semiconductor switch, part or the synchronous rectification of the heterogeneous arbitrarily full-wave/half-wave rectification circuit of realization all sidedly.
According to the high-frequency modulation/demodulation multiphase rectifying device of being applied for of the present invention, the higher harmonic current that outputs to the alternating current source can be suppressed to approximately 1～2%, can realize small-sized, light weight and high efficiency.Though power equipment only accounts for the part of various system equipments originally, but the meeting digital elements that adopt in system from now on more, from current 5V, 3.3V series process 1.8V series, research and development target in the future then is to reach the theoretical level high speed operation near 1V.Though the high efficiency that following power electronic equipment is carrying out miniaturization under the low-voltage, high-current load, but parallel therewith, the power equipment that the high order harmonic component noise is as far as possible little also needs stable system configuration, and the present invention who is applied for can fully respond this problem.
Description of drawings
Fig. 1 shows current waveform and higher harmonic components in the bright existing three-phase full wave rectifier circuit.
The typical High Power Factor Rectifier Circuit that Fig. 2 illustration is existing.
Fig. 3 shows the higher harmonic components in the bright general polyphase rectifier circuit and the specific capacity of filter effect and transformer.
Fig. 4 generally shows the structure of the high-frequency modulation/demodulation multiphase rectifying device of the present invention's first form of implementation.
The circuit of Fig. 5 illustration Fig. 4 medium-high frequency modulating/demodulating multiphase rectifying device primary structure element annular modulating wave power generator.
Interchange input current waveform and annular modulation waveform when Fig. 6 shows bright 18 impulse commutations.
Fig. 7 compares the mode of the present invention that improved the time ratio and common pwm waveform and pulse component thereof.
Fig. 8 shows each phase place that bright synthetic 18 pulse three phase input currents and main rectification circuit and auxiliary rectifier circuit are shared and the relativeness of amplitude.
Fig. 9 explanation shows the method for asking that exchanges peaked I5 vectogram in the input current among Fig. 8.
Figure 10 shows the relativeness of bright interchange input current shown in Figure 8 and each phase current of three-phase.
Figure 11 is shown in the CURRENT DISTRIBUTION that exchanges between input, the direct current output each several part when high-frequency modulation/demodulation multiphase rectifying device among Fig. 4 insulated.
Figure 12 shows the high-frequency modulation/demodulation multiphase rectifying device of the present invention's second form of implementation of bright formation 30 commutating phase circuit.
Figure 13 shows the effect of input filter in the bright 30 impulse commutation waveforms.
Figure 14 shows the high-frequency modulation/demodulation multiphase rectifying device of the present invention's the 3rd form of implementation of bright low-voltage, big electrical insulation.
Figure 15 shows the drive circuit when bright alternative main rectifier diode carries out synchronous rectification.
Embodiment
Below by form of implementation in detail the present invention is described in detail
For ease of explanation, at first summarize low THD, total harmonic distortion (THD) and fundamental component and series filter capacity when low noise carries out poly phase rectification under low frequency, the relation of the THD during additional filter, heterogeneous conversion transformer capacity, input and output power ratio of being used for Fig. 3.THD numerical value in Fig. 3 table in one is measured value, though it shows theoretical value that beguine figures out according to Fuli's leaf-size class approximately low 10%, but this is that purpose is to estimate the improvement degree relative with umber of pulse owing to the source impedance of distribution system and device capacitive balance change.
Current most alternating current equipments are removed outside the special installations such as determinator, the standard of being passed through be voltage distortion coefficient, current distortion coefficient all be THD below 5%, the independent component of each high order harmonic component comprises rate below 3%.Therefore, when not having input filter,,, need to satisfy above heterogeneousization of 30 pulses, and when 18 pulses, 24 pulses,, can satisfy standard-required if set up the illustrative LC filter of Fig. 4 (2) according to the measured value of showing among Fig. 3 in order to satisfy above-mentioned standard.
On the other hand, in the situation of 6 pulses, 12 pulses, if not having that the active type shown in Fig. 2-(4), (5) is then many can not conformance with standard, Fig. 2-(6) illustration is in order to reduce active mode filter has used the passive filter simultaneously with the capacity of switch situation.
In a word, if on the related content that only limits to be delivered on the scientific paper of home and abroad, then with respect to the change that comprises the load current of transient phenomena in interior wide scope, the power-factor of load etc., the practical capacity that can infer active type can reach about THD4%.Like this, active type can be used for the big PWM control of pulse duration change from the principle, but can not suppress the noise spectrum power up to the 30MHz bandwidth in powerful device, can might influence communication equipment and medicine equipment etc.
In contrast, passive shown in Fig. 2-(1), (2) can not carry out HF switch from the principle, and in Fig. 2-(3) though in be partly to have carried out switch, but in order to realize eliminating the purpose of 11 times, 13 times high order harmonic component, then can carry out control with about 5% power of dc output power, therefore active type big noise power like that can not take place near the fixed pulse phase place.But opposite is to need heterogeneous conversion transformer shown in Figure 2, so be difficult to realize miniaturization and.
Its notable feature of high-frequency modulation/demodulation multiphase rectifying device of the present invention is, replaces the sort of low-frequency transformer among Fig. 2-(1), (2) and (3), realizes heterogeneousization of input side three-phase alternating current with high frequency transformer.For this purpose, annular modulation technique used in the communication technology is introduced the electrical power field.Specifically, annular modulating wave electrical power is added on the elementary winding of three-phase or single-phase three multiple winding high frequency transformers, and the main winding of primary side is connected with a plurality of auxiliary (third level) windings, by this structure contained low frequency component in the modulation waveform is carried out heterogeneous conversion, the diode itself that will constitute demodulator circuit again is also used as heterogeneous full-wave rectifier.In addition, minimize, do not produce the switch drive of downtime basically for making the switching noise of following electronization to produce.Like this, compare,,, the high frequency noise component is reduced number/one keeping exchanging the continuity of input side electric current substantially by driving each switch with time ratio near 50% one-sided with existing PWM control switch mode.
The present invention relates to small-sized, the lightweight that can keep equal with active type PFC, can reach 1～2% the THD that is difficult in the active type realize simultaneously and reduce the high-frequency modulation/demodulation multiphase rectifying device of noise power in the high frequency band, specific embodiment as described below.
Fig. 4 shows the structure of the high-frequency modulation/demodulation multiphase rectifying device of bright first form of implementation of the present invention.The rectifying device of this form of implementation is that the rectifying device with 18 phases (pulse) is an example, selects it to be because this circuit scale in heterogeneous conversion is little, is convenient to explanation, even but 24,30,36 and 42 commutating phase devices, basic principle does not change.
Among Fig. 4, (1) is the inductor of series connection, plays the effect that suppresses high order harmonic component with LC type homogeneous filter (2).(3) be direct-coupled three-phase full wave rectifier circuit, share 1/3 of full average anode current.(4a), (4b) with (4c) be the annular modulating wave demodulator auxiliary three-phase full wave rectifier circuit of holding concurrently, (4a) share 1/3 of full average anode current, (4b) with (4c) respectively share 1/6 of full average anode current.(5) be common dc pulse filter, (6) be the heterogeneous conversion transformer of high frequency that keeps the annular modulating wave of input three-phase alternating current phase place, (7a), (7b) with (7c) be Fig. 5 (a), (c) with (d) in detailed illustrative annular modulating wave power generator, the voltage waveform that produces in each winding become with the proportional figure of turn ratio (5)-b in shape.Among this external Fig. 5, (S1)～(S8) represent switch.(8a), (9a) is respectively elementary, the secondary and third level winding that makes three-phase input R-S phase modulated voltage transformation mutually with (10a), (8b), (9b) and (10b) be respectively elementary, secondary and the third level winding that makes three-phase input S-T phase modulated voltage transformation mutually, (8c), (9c) make three-phase import elementary, the secondary and third level winding of T-R phase modulated voltage transformation with (10c) being respectively.(11) be aforementioned three groups of annular modulating wave power generators (7a), (7b) and gating drive circuits (7c), (12a) be direct current output+terminal, (12b) be direct current output-terminal, (13) be buffer condenser, assist three-phase full wave rectifier circuit (4a), (4b) and annular modulating wave demodulator diode combination (4c) by holding concurrently, constitute loss-free buffer circuit with annular modulating wave demodulator.
As mentioned above, in the input AC electrical power, R, S, each voltage between phases of T be by annular modulating wave power generator (7a), (7b) and (7c) the above fixed frequency modulation of 10KHz, be added to the elementary winding (8a), (8b) of the heterogeneous conversion transformer of high-frequency (6) with (8c) on.By with the secondary winding (9a) of the heterogeneous conversion transformer of high frequency (6), (9b) and (9c) with third level winding (10a), (10b) and (10c) for example connect by shown in Fig. 4, (for simplicity following from (1) terminal, the numeral that surrounds with circle among the figure is generally used bracketed numeral) to (9) terminal place, the annular modulation waveform of 9 phase low-frequency ac phase place lower envelopes modulation takes place.
Fig. 6-(b), (c) and the waveform example of (d) showing bright trial-production device, because lossless buffering effect, spike noise does not take place in the high-frequency impulse, and the current waveform when input AC current waveform figure 6-(a) also carries out the polyphase ac conversion with low-frequency transformer does not have big difference.
Switch (S1) shown in Fig. 5-(a), (c), (S2) also can adopt the backside two-way IGBT that connect or newly-developed of IGBT though be the MOS-FET of usefulness usually to be made backside connect as bidirectional switch.In addition when the driving pulse width of gating drive circuit (11) fixing and when not carrying out pulse-width modulation as time ratio 50%-(idle time), then full-wave rectification output waveform is shown in Fig. 7-(a), become the few voltage of high frequency noise components, current waveform, with Fig. 7 that carries out common pulse-width modulation-(b) compare, can see that noise component(s) has reduced number/one.Gating drive circuit (11) drives Fig. 5-switch (S1) (a), (S2), (S7) simultaneously, or when phase reversal simultaneously driving switch (S3), (S4), (S5) with (S6).This operation be all program blocks with respect to the annular modulating wave power generator (7a) among Fig. 4, (7b) and (7c) with identical phase driven, by making the impulse phase unanimity, guarantee operate as normal.
The rectification operation of the high-frequency modulation/demodulation multiphase rectifying device among Fig. 4 has certain complexity, now describes with Fig. 8 and Fig. 9.Fig. 8-(c) is only with the relation of voltage and modulating wave phase place between the low frequency component performance heterogeneous conversion transformer of high frequency (6) secondary terminal.Being representative in this 18 impulse phase, represent the voltage vector of transformer secondary output winding in the impulse phase of (1), (2), (3) and (4) with thick arrow among Fig. 8-(b).Each phase current during the phase place of (3) therein, flow through the electric current of (11+13) mutually at R, flow through the electric current of (I0-I4-I3) at S mutually, flow through the electric current of (I2+I4) at T mutually, in each secondary winding of transformer, flow through with I1, the I2 shown in the dotted line of arrow, I3 and I4 electric current.At this, the input current of the auxiliary rectifier of 10 presentation graphs 4, its amplitude equals the output of 18 impulse commutation direct currents, the positive and negative respectively alternating current component of 1 pulse for time ratio 1/18, I1, I2, I3 and I4 are the current values that flows through each secondary winding of transformer during the phase place (3), its value is easily calculated according to the voltage between the secondary rolling thread circle as shown in the table of Fig. 8-(a).During the voltage vector of arrow (2), only changed I1 and I2, I3 and I4 in Fig. 8-(b), in this case, R1 also replaces with T1 electric current mutually.
Be the input AC current waveform of Fig. 8-(a) when above situation is represented with time shaft, (1) among the figure, (2), (3) and (4) are corresponding to the item mutually of Fig. 8-(b) and Fig. 8-(c).Make clear to add for the relation that makes three-phase import each phase current among Figure 10 and gone up aforesaid phase relation, the high frequency polyphase rectifier of holding concurrently auxiliary three-phase full wave rectifier circuit 4 (a), 4 (b) and 4 (c) formation by annular modulating wave power generator 7 (a), 7 (b) and 7 (c), the heterogeneous conversion high-voltage device of high frequency (6) and annular modulating wave demodulator when this external (1), (4) phase place, direct-coupled three-phase full wave rectifier circuit (3) the load sharing electric current that impedance is low.So in (1), (4) interval, the load of above-mentioned high frequency polyphase rectifier reduces, and has improved the efficient of rectifying device integral body.On the contrary, because the existence of direct-coupled three-phase full wave rectifier circuit (3), the insulation between the input and output of observing on the whole from rectifying device can not be guaranteed.
Figure 11 shows the bright CURRENT DISTRIBUTION of each several part when removing direct coupling three-phase full wave rectifier circuit (3) constituting 18 commutating phase circuit from Fig. 4.Rectifier (4a) is also used as direct coupling three-phase full wave rectifier circuit (3), bear positive and negative each 2 segment pulse (the positive and negative pulse I0 of Figure 10), share in element conductive interval as Figure 11, realizes input and output insulated type high-frequency modulation/demodulation multiphase rectifying device thus.In addition, the three-phase full-wave electric bridge of (4a) is born 2/3 of whole output in this example, (4b), (4c) respectively shares 1/6 output, but this is in order to reduce the primary side winding electric capacity of high frequency transformer, even auxiliary three-phase full wave rectifier circuit (4a), (4b) and each electric bridge (4c) are respectively shared 1/3 load equably and designed high frequency transformer but annular modulating wave demodulator is held concurrently, can all not have by a point failure yet.But in this case, with respect to same direct current output, the primary side winding electric capacity of high frequency transformer also can increase about 20%.
The following describes the high-frequency modulation/demodulation multiphase rectifying device of second form of implementation of the present invention.The rectifying device of this form of implementation is the example of non-insulated type 30 commutating phase devices, and Figure 12 shows that bright its circuit connects example.Parts identical with Fig. 4 among Figure 12 are attached with identical label.Different heterogeneousization (from 9 to 15 phase) that are in the transformer secondary output winding of 18 commutating phase devices among the rectifying device of this form of implementation and Fig. 4, and the auxiliary three-phase rectifier (4d) that thereupon appends with (4e), the current value that has changed each several part distributes.In addition, the method for attachment of transformer secondary output winding comprises that with the sort of method of attachment shown in the dotted line in scheming (the secondary winding electric capacity of this moment has increased several percentage points) modification in 2～3 is arranged, but its choice selection then is general known technology.
Figure 13 shows the current waveform of circuit shown in bright Fig. 2.(A) among Figure 13 is the situation that series reactor (1), homogeneous filter (2) (mode of resonance under 50Hz * 30=1.5KHz) all do not have, and THD is about 4%, and when (B) among Figure 13 showed the series reactor (1) of bright insertion 3% voltage drop, THD about 2.6%; (C) among Figure 13 shows that bright filter (2) with identical series reactor (1) and homogeneous is incorporated into a time-out, has confirmed to obtain 1% THD.Such value is that the rectification circuit of any High Power Factor in the past all is difficult to realize.Also show superior part of the present invention thus.In addition, the capacity of three-phase series reactor (1) at this moment is 3.7% of a dc output power, the capacity of the reactor of homogeneous filter (2) is 1.2% of every single-phase DC power output, resonance is about 0.5 μ F/ phase/direct current output 1KW when connecting with the capacitor Δ, proportion shared in all volumes of rectifying device, weight and cost is little.
Have, in the circuit of Figure 12, when removing direct coupling three-phase full wave rectifier circuit (3), then 18 commutating phase devices with Figure 11 are identical again, in the integral body of 30 commutating phase devices, exchange input and can be insulated by the heterogeneous conversion transformer of high frequency (6) with direct current output.At this moment, the input of direct-coupled three-phase full wave rectifier circuit (3), output current (2/15)
1/2I, (3/15) I are added on the three-phase full wave rectifier circuit (4a), and making input, the output current of three-phase full wave rectifier circuit (4a) share part becomes (6/15)
1/2I, (6/15) I.In addition, the heterogeneous conversion transformer of high frequency (6) and annular modulating wave power generator (7a), 7 (b) and the capacity of 7 (c) are except multiplication (5/4)
1/2No change in addition, object lesson omits.After the imput output circuit insulation, obviously can freely select voltage ratio again according to elementary, the secondary and third level ratio of winding of high frequency transformer.
Figure 14 shows 18 impulse commutation examples of the power supply high frequency reduction type rectifying device of bright 12V1000A level.With the circuit of Fig. 5-(d) be used for annular modulating wave power generator (7a), (7b) with (7c), with the time ratio driving switch (S9) of 50%-(idle time) with (S10), though switch (S11) with identical time ratio is arranged (S12), but by known phase difference PWM control, usually annular modulating wave power generator (7a), (7b) and source impedance (7c) can be reduced, stable operation can be carried out., though direct current output can have 10～100% variation at this moment need at alternating current source set up noise filter by phase difference control this moment.Have again,, also whole efficiency can be remained to more than 90% even when rectifier diode adopted the Schottky barrier form.
For situations such as 24 pulses, 36 pulses and 42 pulses, from the principle, if secondary and the third level winding of the heterogeneous conversion transformer of high frequency (6) is made up, set up the demodulator rectifier diode of holding concurrently in outlet side again, obviously also easily realize The above results, the explanation of relevant this respect example is omitted at this.
Figure 15 shows the drive circuit when the main rectifier diode of bright replacement carries out synchronous rectification, to be used to realize higher efficient.Though be that the simplest relatively 3 phase all-wave situations describe in this example, but the input power supply from the low frequency to the high frequency, further for 6,12,24,30,36 with 42 mutually multi-phase AC powers, in all half-waves, full-wave rectifying circuit, by constitute the auxiliary rectifier circuit with the complete same form of main rectifier cell by light sensitive metal oxide semiconductor switch, come the main switch of drive arrangements correspondent equal with light sensitive metal oxide semiconductor switch, then can realize synchronous rectification by simple circuit configuration.
Q among the figure
1～Q
6Be main switch, PS
1～PS
6Be light sensitive metal oxide semiconductor switch, E
1～E
6Be the driving power supply.In addition, by dummy resistance R
LAdjustment is by the electric current of photodiode.
By taking above structure, generally the voltage drop of about 0.6V of Schottky barrier diode can be reduced to below the 0.1V, can improve low pressure, big electric current efficient with rectification circuit.In addition, examine filter, also rectifier cell that can be whole and only carry out synchronous rectification with the big element of load current from the mixed economy viewpoint.
Have again, owing to do not use jumbo electrolytic capacitor in the apparatus structure of the present invention, thus can expect to have long useful life, and the impulse current in power supply when input is minimum.
Claims (5)
1. the multiphase rectifying device of a high-frequency modulation/demodulation, this device comprises: the direct coupling three-phase full wave rectifier circuit that is used for the three-phase alternating current of three-phase alternating-current supply input is transformed to direct current; And high order harmonic component correcting circuit, a plurality of annular modulating wave demodulator and auxiliary three-phase full wave rectifier circuit that this correcting circuit has be arranged in parallel with this full-wave rectifier three groups annular modulating wave power generators, is provided with corresponding to the number of phases, described multiphase rectifying device is characterised in that: it makes the direct current output of above-mentioned high order harmonic component correcting circuit be connected with the direct current output-parallel of above-mentioned direct-coupled three-phase full wave rectifier circuit, and constitute one when the three-phase alternating current source is observed the heterogeneous full-wave rectifying circuit of the 6n phase (n is 3～7 integer) of equivalence.
2. high-frequency modulation/demodulation multiphase rectifying device according to claim 1, it is characterized in that: each phase primary side winding of the heterogeneous conversion transformer of three-phase multiple winding high frequency is connected, with annular modulating wave power generator secondary winding side being connected by main winding and many auxiliary windings, one group of polyphase ac output voltage of annular modulation is taken place from heterogeneous output, be connected with main three-phase full wave rectifier circuit output-parallel by the direct current output that makes heterogeneous full-wave rectifier again with the ac input end that connects corresponding to these heterogeneous outputs.Thereby heterogeneous full-wave rectifier just is also used as annular modulating wave demodulator and power high-order harmonic generation reduces with auxiliary three-phase full wave rectifier circuit.
3. high-frequency modulation/demodulation multiphase rectifying device according to claim 1 and 2 is characterized in that: each phase primary side winding of the heterogeneous conversion transformer of three-phase multiple winding high frequency is connected with annular modulating wave power generator.In the secondary winding side, by being connected of main winding and many auxiliary windings, in the polyphase ac output voltage of annular modulation one group is taken place from heterogeneous output, make the direct current output of heterogeneous full-wave rectifier supply with direct load again with the ac input end that connects corresponding to these heterogeneous outputs, three-phase alternating-current supply and load-side are then by the heterogeneous conversion transformer insulation of high frequency, in addition, heterogeneous full-wave rectifier is also used as annular modulating wave demodulator and the auxiliary three-phase full wave rectifier circuit of power high-order harmonic generation reduction.
4. according to the high-frequency modulation/demodulation multiphase rectifying device of claim 1 to 3 described in each, it is characterized in that: each phase primary side winding of the heterogeneous conversion transformer of three-phase multiple winding high frequency is connected with annular modulating wave power generator, primary side is by the combination of main winding and many auxiliary windings, one group in the polyphase ac output voltage that feasible annular with centre tapped 18 phases or 30 phases is modulated from heterogeneous output generation, by connecting the heterogeneous half-wave rectifier of 18 pulses or 30 pulses corresponding with these heterogeneous terminals, this direct current output is offered load, then can when making the insulation of three-phase alternating-current supply and load-side, reduce the high order harmonic component of power supply, then adjust VD serially by annular modulating wave power generator being carried out time ratio control.
5. according to the high-frequency modulation/demodulation multiphase rectifying device of claim 1 to 4 described in each, it is characterized in that: the main rectification circuit that constitutes polyphase rectifier circuit by active element, on the other hand, constitute and the identical circuit arrangement of main rectification circuit by light sensitive metal oxide semiconductor switch and accessory power supply, by the output of light sensitive metal oxide semiconductor switch, part or the synchronous rectification of the heterogeneous arbitrarily full-wave/half-wave rectification circuit of realization all sidedly.
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| JP2005358191 | 2005-12-12 | ||
| JP358191/2005 | 2005-12-12 | ||
| PCT/JP2006/324646 WO2007069556A1 (en) | 2005-12-12 | 2006-12-11 | High-frequency modulation/demodulation multiphase rectifying device |
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| CN101331671B CN101331671B (en) | 2012-06-06 |
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| JPS5915475B2 (en) * | 1980-03-24 | 1984-04-10 | 久男 松本 | Three-phase frequency converter with improved AC current waveform |
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| JP2005287251A (en) * | 2004-03-30 | 2005-10-13 | Kawasaki Heavy Ind Ltd | Rectifying device |
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- 2006-12-11 CN CN2006800468068A patent/CN101331671B/en active Active
- 2006-12-11 JP JP2007550161A patent/JP4808221B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| JP4808221B2 (en) | 2011-11-02 |
| WO2007069556A1 (en) | 2007-06-21 |
| JPWO2007069556A1 (en) | 2009-05-21 |
| CN101331671B (en) | 2012-06-06 |
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