CN100521856C - Electronic ballast for high-intensity discharge lamps - Google Patents
Electronic ballast for high-intensity discharge lamps Download PDFInfo
- Publication number
- CN100521856C CN100521856C CNB018239234A CN01823923A CN100521856C CN 100521856 C CN100521856 C CN 100521856C CN B018239234 A CNB018239234 A CN B018239234A CN 01823923 A CN01823923 A CN 01823923A CN 100521856 C CN100521856 C CN 100521856C
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- China
- Prior art keywords
- ballast
- electronic switch
- power
- output
- lamp
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Rectifiers (AREA)
Abstract
An electronic ballast for supplying operating power to a high-intensity discharge (HID) lamp. The ballast includes a full-wave rectifier connected to an AC power line to produce an unregulated pulsating DC output which is applied to a power factor correction (PFC) circuit. The PFC circuit includes a first semiconductor electronic switch (S1) whose activation is controlled to bring the input current and voltage in time-phase with one another, thereby imparting a high power factor rating to the ballast. The pulsating DC output of the PFC circuit is applied to a storage capacitor circuit which is charged thereby, the capacitor circuit including a second electronic switch (S2) whose activation is controlled to discharge the capacitor so as to cause the capacitor circuit to yield in its output, a regulated DC which is fed to a power control (PC) circuit. The PC circuit includes a third electronic switch (S3) whose activation is controlled to maintain the wattage of power supplied to the HID lamp at the rated wattage of the lamp.
Description
Invention field
The present invention relates to be suitable for providing the electric ballast of operate power to high-intensity discharge lamp.
Background of invention and prior art state
The function of electric ballast is to high-intensity discharge lamp (HID), and metal halid lamp for example is provided at and starts and required power during work.Metal halid lamp is that metal halide is sealed in a kind of high-voltage gas discharging light in the quartz container.Because the geometric volume of this lamp is little and the high efficiency of approximate white light is arranged, and now has been widely used for throw light on sport field and road.This lamp also has many industry and domestic. applications.
Be startup work, metal halid lamp needs high ignition voltage.But in case after encourage arc discharge, lamp is just kept by the voltage of an AC supply voltage that is not higher than ballast and is connected when working.So the function of electric ballast is exactly a voltage and current required when the HID lamp related with it provides lamp at startup and subsequent working with its specified wattage.
Though metal halid lamp merits attention because of its geometric volume is little, in the existing ballast that power is provided to lamp, there are not this characteristics, because typical multistage electric ballast has many magnetic and power component, and these all can not compact package.The present invention is intended to create a kind of electric ballast of the HID of being used for lamp, and it has magnetic and the power component that lacks than the standard electronic ballast, and small-sized, efficient and reliable operation.
The efficient of electric ballast depends primarily on its power factor rated value when the HID lamp provides power.Power factor is defined as actual input power levels divided by the apparent power level.The apparent power level with a watt expression, multiply by the RMS current value by the RMS magnitude of voltage and determines.Power factor is load current and the voltage function of homophase degree mutually in time.Load current degree leading or lagging voltage is big more, and power factor is just low more, and the efficient of ballast is also low more.
For the electric ballast that is used for the HID lamp with high power factor rated value is provided, in the United States Patent (USP) 6034489 (2000) of authorizing Weng and 5986901 (1999) and authorize in the United States Patent (USP) 6020690 (2000) of Sun and disclose the electric ballast that comprises power factor correcting (PFC) level.What offer this one-level is the not adjusting DC power of deriving from the bridge rectifier that is connected to ac power cable.Described PFC level be used for making input current basically with the voltage homophase, thereby make ballast have the high power factor rated value.
Disclosed PFC level is associated with ballast stage in the above-mentioned United States Patent (USP), and the wattage that for example will be provided to the HID lamp maintains the power level control of required level, regulates the energy storage capacitor level of the DC power that offers power level control.At capacitor level, capacitor is used for storage power when line voltage is lower than the RMS level.
Various magnetic that each grade of ballast that is associated with disclosed PFC level in the above-mentioned patent all needs and power component and the transistor that plays the electronics on-off action, for the size of ballast, weight and cost all count for much.And these a large amount of elements just can not be created the small-sized ballast that can make the work of small-sized HID lamp.
United States Patent (USP) 5144222 (Herbert) discloses a kind of DC-DC power converter, and this transducer can be used for single-phase or heterogeneous AC input.By using feedfoward control (particularly being to use the feedforward of power output to control input power), make the use of FEEDBACK CONTROL become minimum.The dynamic electric resistor of input is under control, and this has guaranteed the high power factor in the AC input of transducer.Many input buck converters can have parallel or the serial input, and one or more described input is can specific output low, even can be zero or negative.How the output boost converters can have parallel or serial output, and one or more described output can be lower than input, even can be zero or negative.In the described step-down controller each all has its oneself independent inductor.
Summary of the invention
In view of above-mentioned, main purpose of the present invention is exactly a kind of electric ballast that is provided for the HID lamp, it is characterized in that high power factor rated value and high efficiency, and has less magnetic and power component than the existing ballast that is used for same purpose.
More particularly, one object of the present invention just provides a kind of electric ballast, its power factor correction circuit, energy storage capacitor circuit and power control circuit are combined into the single circuit with less magnetic and power component, and required parts number lacks when promptly being included in each ballast stage separately than these circuit.A remarkable advantage of electric ballast of the present invention is exactly that it can be packaged into small and light form.Another advantage of described ballast is exactly that it can be produced in a large number with lower cost.
In brief, these purposes are by providing the electric ballast of operate power to realize to high-intensity discharge (HID) lamp, described electric ballast comprises the full-wave rectifier that is connected to ac power cable, is added to the pulsation DC output of the not voltage stabilizing on power factor correcting (PFC) circuit in order to generation.Pfc circuit comprises the first semiconductor electronic switch, its periodic activation is controlled so that make the more approaching in time homophase each other of input current and voltage, thereby made rectifier have high power factor rated value.
The pulsation DC of pfc circuit output is added to makes its charging on the energy storage capacitor circuit, capacitor circuit comprises second electronic switch, and its periodic activation is controlled, and makes the discharge of capacitor can cause capacitor circuit to produce stable DC output.With stable DC output feed-in power control (PC) circuit, described power control circuit comprises the 3rd electronic switch, the periodic activation of described the 3rd electronic switch is controlled the wattage rating that makes the power that is provided to the HID lamp maintain lamp.The periodicity of first, second and the 3rd switch activates synchronized with each other.
Brief Description Of Drawings
In order to understand the present invention and other purpose of the present invention and feature better, see also accompanying drawing, in the accompanying drawing:
Fig. 1 is the block diagram that is used for the prior art electric ballast of HID lamp;
Fig. 2 illustrates the waveform of the pulsation DC output of the full-wave rectifier in the ballast;
Fig. 3 illustrates the schematic circuit diagram according to the ballast of first embodiment of the invention; And
Fig. 4 illustrates the schematic circuit diagram according to the ballast of second embodiment of the invention.
Detailed description of the invention
The prior art ballast: Fig. 1 illustrates and forms the at different levels successively of prior art type ballast.As seen from the figure, the input of described ballast is connected to ac power cable, and with line AC mark, the output of ballast is added on the high-intensity discharge lamp, marks with lamp HID.This lamp can be that essential igniting is to start metal halid lamp or the high-intensity gas discharge lamp of any other type, for example mercury or the sodium vapour lamp of arc discharge.
In the electric ballast of prior art shown in Figure 1, and in ballast shown in Figure 3, the concrete numerical value of electric current and voltage depends on the character of the power line that ballast is connected and the wattage rated value of the HID lamp that ballast makes it work.Therefore, ac power cable is 230V, and it is 120V that the voltage and current numerical value during 50 weeks is different from ac power cable, the voltage and current numerical value during 60 weeks.
The power supply of AC line is by the first order 10 feed-ins of electric ballast, and this is a RFI filter, any radio frequency interference that filtering is transmitted on power line or RF noise.The output of RFI filter stage 10 is added on the all-wave diode bridge rectifier 11.Described rectifier produces the pulsation dc voltage of not voltage stabilizing, and its waveform W is shown in Fig. 2.
Waveform W is made up of the continuous sequence of the half-wave sine pulse P with identical polar and amplitude.Each pulse P rises to peak level from reference level R, gets back to described reference level then.The umber of pulse of per second is the twice of ac power cable electric voltage frequency.Therefore, if ac power cable is 230V, 50 contours, then full-wave rectification is output as 100 pulses of per second, and peak amplitude is near 380 volts.Below the peak level of pulse P 230 volts RMS level, its reflection apparent power level.Between the continuous positive pulse of ripple W the paddy V that weakens power.
Not voltage stabilizing pulsation dc voltage feed-in power factor correcting (PFC) level 12 from bridge rectifier 11, it is leading or lag behind the degree of voltage that described power factor correction stage detects input current, proofread and correct then, the direction and the degree of proofreading and correct should be able to make rectifier that high power factor rated value is arranged, and for example 95%.
Homophase DC output from the pulsation of the not voltage stabilizing of PFC level 12 is added on energy storage capacitor (SC) level 13, make the charging of its capacitor and with regularly time interval discharge, produce stable DC output, wherein the paddy V among the pulsating wave W is filled up effectively, and the power of SC level generation is near peak value like this.The function of SC level 13 is on-Line Voltage storage power when being lower than the RMS level.
Power from SC level 13 is added to power control (PC) level 14, in this one-level, detects the variable power that is provided to the HID lamp, produces and offers the control signal of the power of HID lamp in order to adjusting, so that power is maintained on the wattage rated value of lamp.So,, be exactly 60 watts power basically by rectifier to its firm power that provides if the HID light fixture has 60 watts rated value.
The output feed-in inverter stage 15 of PC level 14, this inverter stage produces square-wave pulse, is added on the resonant circuit in the starter 16 of lamp.During work, from the effect of the resonant circuit of the amplitude in the square-wave pulse forward position that inverter stage is come out sudden change impacts-excitation starter, thereby generation high voltage surge is lighted a fire the HID lamp, the generation arc discharge.
So the ballast of prior art has the high power factor rated value, can make HID lamp igniting and the work related effectively with it.But multistage required magnetic of ballast and power component must be assemblied in the shell to create an independently unit, and these numbers of elements are too many, can not create small and light device.
The present invention: electric ballast of the present invention shown in Figure 3, its structure and prior art ballast shown in Figure 1 are basic identical, have only an important difference.Same element is represented with same abbreviation and numbering in these two kinds of electric ballasts.In the ballast shown in Figure 3, PFC level 12 included among Fig. 1, SC level 13 and PC level 14 are incorporated in the single circuit, this circuit has less magnetic and power component compared with independent required magnetic at different levels and power component.
Like this, the PFC that makes up among Fig. 3, SC and PC level have only three mosfet transistors as electronic switch S1, S2 and S3.Switch S 1 realizes the PFC function of ballast, and switch S 2 realizes SC and PC function simultaneously, and switch S 3 is still as the control of PC power.
Mosfet transistor is a kind of metal-oxide field-effect semiconductor, is characterized in the switching speed height.Because electronic switch S1, S2 and S3 by the high frequency control impuls excitation of frequency up to 50KHZ (with higher), are vital so switch must switch on and off at a high speed simultaneously in ballast circuit.
In typical structure of the present invention, the pulsation DC of bridge rectifier 11 output (its waveform W is shown in Fig. 2) is added on the electronic switch S1 of power factor correction circuit.This switch is driven by the high frequency square wave pulse T1 that pulse generator 17 produces, so pulse generator 17 is the devices as periodic excitation switch S 1.The all available integrated circuit (IC) chip of other pulse generator that is comprised in this pulse generator and the ballast circuit constitutes.
Be added on the grid of MOSFET electronic switch S1 and in the output of bridge rectifier 11, done pulse width modulation according to the control signal CS1 that derives from series resistor device 18 with the periodic square wave pulse T1 that high frequency speed switches on and off this switch from generator 17.Input current will flow to power factor correction circuit through resistor 18, so resistor 18 can detect the phase deviation of described electric current and voltage as the input current transducer.
The pulse width modulation that is added to the square-wave pulse T1 on the grid of MOSFET electronic switch S1 has changed the duty cycle of switch motion, the i.e. ratio of the ON of switch (connection) time and OFF (disconnection) time.Owing to the duty cycle as input current and voltage time phase the upper deviation degree and the function of direction change, switch S 1 just can be used to realize the power factor correcting through the pulsation DC power of described switch.
In the output of electronic switch S1 the pulsation DC power of overpower factor correction make capacitor by pulsation DC ripple W charging by choke 19 folk prescriptions of connecting energy storage capacitor 21 to ground feed-in capacitor charging/discharging circuit with diode 20.Choke 19 is used as low pass filter, and its useful direct current that is output as is identical with the power rectifier filter.
The energy storage capacitor circuit is used for modulating the pulsation DC power that is added on the described circuit, and method is the paddy V that effectively fills among the pulsating wave W.This operation is realized by MOSFET electronic switch S2, electronic switch S2 provides a discharge path by diode 22 during by pulse excitation, arrives node N in the capacitor circuits output so the discharge folk prescription of capacitor 21 flows through with electronic switch S2 and choke 19 diode in series 22 to ground.Like this, switched on but still capacitor 21 is by diode 20 chargings during in off-state when switch S 2, and when switch S 2 was connected, capacitor 21 discharged by diode 22.Switch S 2 disconnections when input voltage surpasses RMS value, and when voltage drop to this numerical value when following switch S 2 by pulse excitation.The voltage of capacitor 21 must be higher than the voltage that is provided to inverter.
The excitation of control electronic switch S2 makes it when ripple shown in Figure 2 is lower than the RMS level, discharges in the time interval with the paddy V representative of pulsation DC ripple W, thereby redistributes available DC power effectively.
For realizing this operation, the high frequency square wave pulse T2 excitation that electronic switch S2 is produced by pulse generator 23 is so pulse generator 23 is as the device of periodic excitation switch S 2.Pulse T2 carries out pulse width modulation by the control signal that is added on the described generator, and described signal is to derive from the resistor 24 of connecting with the outlet line that load current is flowed through.So resistor 24 provides the control signal that changes with the variation in the load current as load current sensor.As a result, the duty cycle of electronic switch S2 is controlled, and the discharge of the energy storage capacitor 21 of charging just can be used to be adjusted at the last resulting DC power of output node N of energy storage capacitor circuit.
High frequency pulse generator 17 and 23 work synchronized with each other, when the switch S 1 of these generator periodic excitation and S2 disconnected, electric current was added to choke 19 by unidirectional transmission diode 25.
Power from node N is added on the inverter 15 of ballast system by power control circuit, power control circuit comprises the 3rd switch mosfet S3, the pulse width modulation control impuls T3 that derives from pulse generator 23 is added on the grid of S3, so pulse generator 23 is as the device of periodic excitation switch S 3.The pulse width modulation of control impuls T3 is realized by the control signal that derives from load current sensor 24.When the voltage on being added to switch S 3 is lower than the RMS value, switch S 3 closures thereby conducting, and switch S 2 is carried out pulse width modulation control simultaneously.When voltage was higher than the RMS value, switch S 3 was energized with the pulse duration generation to inverter and controls, and 2 disconnections of switch S are inoperative.
So if load current descends, reflection is added to the power reduction of HID lamp, the control signal of gained will make the width of pulse T3 increase, when input voltage was lower than the RMS level, the gained duty cycle of switch S 2 increased, thereby makes load current return to its suitable intensity.
Ballast circuit shown in Figure 3 is being realized the said function of PFC level 12 in the prior art ballast shown in Figure 1, SC energy storage capacitor level 13 and PC power level control 14.But it finishes these functions with less magnetic and power component, because be exactly three MOSFET, an energy storage capacitor, a choke and three diodes according to the main element of ballast circuit of the present invention, does not have transformer or other heavy part.Therefore might be that the HID lamp is made small and light electronic ballast device, magnetic in the described ballast and power component lack than the number of elements in traditional ballast and volume little, so can be encapsulated in the little shell.
As above-mentioned, in ballast circuit shown in Figure 3, the device of periodic excitation MOSFET S2 and S3 is shared pulse generator 23.But also can adopt pulse generator separately if necessary.
Ballast shown in Fig. 4 is identical with above-mentioned ballast with reference to figure 3 explanation in structure and work, different is that it includes the 3rd pulse generator 26, is fed into the pulse S2 of the 2nd MOSFET S2 synchronously with pulse S3 feed-in MOSFETS3 with second pulse generator 23.
More than show most preferred embodiment, should understand and to do change and not deviate from the defined scope of the invention of claims it according to electric ballast of the present invention.
So, when electric ballast of the present invention is used for moving the HID lamp of DC power supply, it will not comprise as shown in Figure 1 provide the inverter of AC to igniter.The igniter that electric ballast comprised that is used for the HID lamp of DC power supply must be the igniter that is suitable for described HID lamp.In addition, the RFI filter that is used for AC power supplies as shown in Figure 1 neither be requisite for electric ballast of the present invention.
Claims (14)
1. electric ballast that is suitable for providing operate power to high-intensity discharge lamp with specific wattage rating, described ballast comprises:
Full-wave rectifier (11), it is connected to ac power cable, produces the pulsation DC output of not voltage stabilizing;
Power factor correction circuit (12), it is connected to the output of described rectifier, described power factor correction circuit is furnished with first electronic switch (S1), described output promptly adds thereon, also comprise device (17), be used for periodically encouraging described first electronic switch and change its duty cycle, to produce unstabilized DC power output, the voltage of described output basically with its electric current homophase, thereby make described rectifier have the high power factor rated value;
Energy storage capacitor circuit (13), the output of described power factor correction circuit is added thereon, make capacitor (21) charging in the energy storage capacitor circuit, described energy storage capacitor circuit is included in excitation and the time makes second electronic switch (S2) of described capacitor discharge and be used for the device (23) that periodically encourages described second electronic switch and change its duty cycle, thereby the DC power that produces voltage stabilizing in the output of described energy storage capacitor circuit is exported; And
Power control circuit (14), it is connected to the output of described energy storage capacitor circuit, the device (23 that the 3rd electronic switch (S3) of power is provided and is used for periodically encouraging described the 3rd electronic switch and changes its duty cycle to lamp when described power control circuit is included in excitation, 26), thus keep the power that offers lamp with the wattage rating of lamp;
It is characterized in that, described ballast comprises single choke (19), the Rectified alternating current stream that has carried out power factor correcting by described power factor correction circuit (12) in the output of described first electronic switch (S1) is fed to described capacitor (21) by diode (20) folk prescription of described single choke (19) and series connection with it to ground, and the DC power that produces described voltage stabilizing is thus exported.
2. ballast as claimed in claim 1 is characterized in that: the pulse excitation of described first, second and the 3rd electronic switch is synchronized with each other.
3. ballast as claimed in claim 1 or 2 is characterized in that: described rectifier is a diode bridge rectifier.
4. ballast as claimed in claim 1 or 2 is characterized in that: described lamp is a metal halid lamp.
5. ballast as claimed in claim 1 or 2 is characterized in that: described lamp is a mercury vapor light.
6. ballast as claimed in claim 1 or 2 is characterized in that: described first, second respectively is made of MOSFET with the 3rd electronic switch.
7. ballast as claimed in claim 1 is characterized in that: the output feed-in inverter (15) of described power control circuit (14), described inverter produces recurrent pulses, is added to and makes described lamp igniting on the igniter.
8. ballast as claimed in claim 1, it is characterized in that: the device of described excitation first electronic switch comprises pulse generator (17), and the high frequency square wave pulse that described pulse generator generation width is modulated is to change the duty cycle of described first electronic switch.
9. ballast as claimed in claim 8 is characterized in that also comprising device (18), is used to detect the input current that flows into described power factor correction circuit, and produces control signal, is added on the described pulse generator to modulate the pulse duration of its generation.
10. ballast as claimed in claim 1 or 2, it is characterized in that: encourage the device of described second electronic switch to comprise second pulse generator (23), the high frequency square wave pulse that described pulse generator generation width is modulated is to change the duty cycle of described second electronic switch.
11. ballast as claimed in claim 10, it is characterized in that: encourage the device of described the 3rd electronic switch to comprise the 3rd pulse generator (26), the high frequency square wave pulse that described pulse generator generation width is modulated is to change the duty cycle of described the 3rd electronic switch.
12. ballast as claimed in claim 11 is characterized in that: the signal controlling that described the 3rd pulse generator is derived by load current sensor (24) makes the function that described pulse duration changes as load current and is modulated.
13. ballast as claimed in claim 11 is characterized in that: described the 3rd pulse generator is synchronoused working with described second pulse generator.
14. ballast as claimed in claim 1 or 2 is characterized in that: the described device (26) that is used for the described device (23) of described second electronic switch of periodic excitation and is used for described the 3rd electronic switch of periodic excitation (S3) is combined into integral body.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2001/002067 WO2003041456A1 (en) | 2001-11-05 | 2001-11-05 | Electronic ballast for high-intensity discharge lamps |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1582604A CN1582604A (en) | 2005-02-16 |
| CN100521856C true CN100521856C (en) | 2009-07-29 |
Family
ID=11004203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB018239234A Expired - Fee Related CN100521856C (en) | 2001-11-05 | 2001-11-05 | Electronic ballast for high-intensity discharge lamps |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1442637A1 (en) |
| CN (1) | CN100521856C (en) |
| CA (1) | CA2465829A1 (en) |
| WO (1) | WO2003041456A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100661906B1 (en) * | 2006-02-06 | 2006-12-27 | (주) 파워에이앤디 | Illumination control apparatus using a pulsating wave |
| CN103391676B (en) * | 2013-07-01 | 2016-01-06 | 广州纽威光电科技有限公司 | Hot exposure metal halogen lamp electric ballast |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5144222A (en) * | 1991-01-07 | 1992-09-01 | Edward Herbert | Apparatus for controlling the input impedance of a power converter |
| US5235504A (en) * | 1991-03-15 | 1993-08-10 | Emerson Electric Co. | High power-factor converter for motor drives and power supplies |
| DE69205885T2 (en) * | 1991-05-15 | 1996-06-13 | Matsushita Electric Works Ltd | Apparatus for operating discharge lamps. |
| CA2172481A1 (en) * | 1996-03-22 | 1997-09-23 | Paul Kotlarewsky | Transformerless ballast with separate ignition circuit |
| US6271633B1 (en) * | 1999-11-01 | 2001-08-07 | Philips Electronics North America Corporation | High power factor electronic ballast with fully differential circuit topology |
-
2001
- 2001-11-05 CN CNB018239234A patent/CN100521856C/en not_active Expired - Fee Related
- 2001-11-05 CA CA002465829A patent/CA2465829A1/en not_active Abandoned
- 2001-11-05 WO PCT/IB2001/002067 patent/WO2003041456A1/en not_active Application Discontinuation
- 2001-11-05 EP EP01980803A patent/EP1442637A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003041456A1 (en) | 2003-05-15 |
| EP1442637A1 (en) | 2004-08-04 |
| CN1582604A (en) | 2005-02-16 |
| CA2465829A1 (en) | 2003-05-15 |
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