CN102811016A - Intelligent motor power saver - Google Patents
Intelligent motor power saver Download PDFInfo
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- CN102811016A CN102811016A CN2011101493303A CN201110149330A CN102811016A CN 102811016 A CN102811016 A CN 102811016A CN 2011101493303 A CN2011101493303 A CN 2011101493303A CN 201110149330 A CN201110149330 A CN 201110149330A CN 102811016 A CN102811016 A CN 102811016A
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Abstract
The invention discloses an intelligent motor power saver. A second current sampling unit is connected with a motor and further connected with a power adjusting unit which is connected with a voltage sampling unit and a first current sampling unit respectively, the voltage sampling unit, a zero detection unit, a sawtooth wave formation unit and a power adjusting signal synthesizing unit are connected sequentially, the second current sampling unit, a phase demodulation unit and the power adjusting signal synthesizing unit are connected sequentially, the voltage sampling unit is further connected with the phase demodulation unit, and the power adjusting signal synthesizing unit is connected with the power adjusting unit through a shift switch which is connected with a square-wave oscillator. By adopting the technical scheme, input power of the motor can be adjusted according to load rate of the motor to guarantee the motor to work with optimal efficiency to improve actual working efficiency of the motor and achieve power-saving effects.
Description
Technical field
The present invention relates to the power-saving technique field, relate in particular to the intelligent electric machine electricity-saving appliance.
Background technology
The usage quantity of China's threephase asynchronous accounts for more than 78% of various motor total quantitys, and purposes very extensively.General enterprise has several, tens, and there is the hundreds of platform in large enterprises, and super large enterprise has thousands of, and the electric energy that it consumed accounts for 68% of industrial total power consumption.And most motors often be in zero load, underloading, in carry and the situation of varying load (empty, gently, heavily alternation) is moved; Load factor low (low load with strong power); Inefficiency, electric energy terminal utilance has only 30%～40%, and the electric energy loss phenomenon is serious.
Summary of the invention
The objective of the invention is to propose the intelligent electric machine electricity-saving appliance, can be according to the size of load-rate of motor, the adjustment power input to machine is worked under optimum efficiency to guarantee motor, thereby is improved motor real work efficient, reaches power savings.
For reaching this purpose, the present invention adopts following technical scheme:
The intelligent electric machine electricity-saving appliance; Comprise that Power Regulation unit, voltage sampling unit, zero-detection unit, sawtooth waveforms form unit, Power Regulation signal synthesis unit, square-wave oscillator, phase demodulation unit, the first current sampling unit, diverter switch and the second current sampling unit, the second current sampling unit is connected with motor, and the second current sampling unit also is connected with the Power Regulation unit; The Power Regulation unit is connected with the first current sampling unit with the voltage sampling unit respectively; Voltage sampling unit, zero-detection unit, sawtooth waveforms form the unit and are connected successively with the Power Regulation signal synthesis unit, and the second current sampling unit, phase demodulation unit and Power Regulation signal synthesis unit are connected successively, and the voltage sampling unit also is connected with the phase demodulation unit; The Power Regulation signal synthesis unit is connected with the Power Regulation unit through diverter switch; Square-wave oscillator is connected with diverter switch, wherein
Voltage sampling unit, the first current sampling unit, the second current sampling unit, phase demodulation unit and Power Regulation signal synthesis unit are used to accomplish load-rate of motor and detect; Zero-detection unit, sawtooth waveforms form unit, Power Regulation signal synthesis unit, square-wave oscillator, and the Power Regulation unit is used to accomplish the power of motor adjustment.
Also comprise soft start unit, overload protection unit, phase-lacking protective unit, soft stop unit and start the running converting unit; The input of soft start unit, overload protection unit and phase-lacking protective unit is connected with the output of the second current sampling unit; Soft start unit, startup running converting unit are connected with the Power Regulation signal synthesis unit successively; The output of overload protection unit, phase-lacking protective unit and soft stop unit be connected with the Power Regulation unit through diverter switch; Wherein, the soft start unit is used for starting current is controlled at 1 to 2.5 times of rated current, and adjustable continuously; The overload protection unit is used for controllable silicon and turn-offs, the motor outage; Phase-lacking protective unit is used for controllable silicon turn-offs, the protection motor; The soft stop unit is used for the constant current slope soft stop of motor parking function.
Adopted technical scheme of the present invention, had the following advantages:
1, constant current soft start.Starting current is controlled at 1～2.5 times of rated current, and adjustable continuously, alleviate the infringement that impulse current causes motor, equipment and electrical network, improve the stability of system.The instead reduced voltage starter is practiced thrift a large amount of non-ferrous metals.Be applicable to that different operating modes use starter, have wide range of applications.
2, power savings is remarkable.The automatic control motor input power increases substantially the motor actual operating efficiency, prolongs motor useful life.Integrated power-saving >=18%, underloading economize on electricity >=60% improves power factor (PF) simultaneously, improves the economic benefit that supplies the electricity consumption both sides.
3, defencive function is perfect.Phase shortage, overload, overvoltage, under-voltage, short circuit etc. have automatic protection functions.The overload protection electric current, the overload protection delay time can freely be set.Various protections all have auto-lock function.
4, highly reliable non-maintaining.Adopt up-to-date power electronics control module to replace contactor, contactless, do not have that electricity is lonely, the life-span is long, safe and reliable, maintenance cost is low, also have little (following 50 * 35 * 23cm of 100KW of volume simultaneously
3), in light weight, debugging series of advantages such as easy for installation, be the renewal product of traditional power distribution cabinet and electric motor starting equipment.
Description of drawings
Fig. 1 is the structural representation of intelligent electric machine electricity-saving appliance in the specific embodiment of the invention.
Embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and through embodiment.
Fig. 1 is the structural representation of intelligent electric machine electricity-saving appliance in the specific embodiment of the invention.As shown in Figure 1, this intelligent electric machine electricity-saving appliance comprises that Power Regulation unit, voltage sampling unit, zero-detection unit, sawtooth waveforms form unit, Power Regulation signal synthesis unit, square-wave oscillator, phase demodulation unit, the first current sampling unit, diverter switch, the second current sampling unit, soft start unit, overload protection unit, phase-lacking protective unit, soft stop unit and start the running converting unit.
The second current sampling unit is connected with motor; The second current sampling unit also is connected with the Power Regulation unit; The Power Regulation unit is connected with the first current sampling unit with the voltage sampling unit respectively; Voltage sampling unit, zero-detection unit, sawtooth waveforms form the unit and are connected successively with the Power Regulation signal synthesis unit; The second current sampling unit, phase demodulation unit and Power Regulation signal synthesis unit are connected successively, and the voltage sampling unit also is connected with the phase demodulation unit, and the Power Regulation signal synthesis unit is connected with the Power Regulation unit through diverter switch; Square-wave oscillator is connected with diverter switch; The input of soft start unit, overload protection unit and phase-lacking protective unit is connected with the output of the second current sampling unit, the soft start unit, start the running converting unit and be connected successively with the Power Regulation signal synthesis unit, the output of overload protection unit, phase-lacking protective unit and soft stop unit be connected with the Power Regulation unit through diverter switch.
Wherein, voltage sampling unit, the first current sampling unit, the second current sampling unit, phase demodulation unit and Power Regulation signal synthesis unit are used to accomplish the load-rate of motor detection; Zero-detection unit, sawtooth waveforms form unit, Power Regulation signal synthesis unit, square-wave oscillator, and the Power Regulation unit is used to accomplish the power of motor adjustment; The soft start unit is used for starting current is controlled at 1～2.5 times of rated current, and adjustable continuously; The overload protection unit is used for controllable silicon and turn-offs, the motor outage; Phase-lacking protective unit is used for controllable silicon turn-offs, the protection motor; The soft stop unit is used for the constant current slope soft stop of motor parking function.
Intelligent energy-saving electric appliance mainly is divided into two parts: the one, and the detection of load-rate of motor, the 2nd, the adjustment of power of motor.In side circuit, the detection of load-rate of motor is (phase difference heavy load rate more is low more, and the more little load factor of phase difference is rate more) of realizing through the phase difference that detects electric moter voltage and electric current.The adjustment of power of motor is to realize through the angle of flow (promptly changing the mean value of motor voltage) that changes silicon controlled module.
Each cell operation process is following:
1, voltage sampling, current sampling.
Voltage sampling is accomplished by the optical coupling plate: 3 phase 380V sinusoidal acs, through the step-down of SW220KQ resistance, diode limiting is delivered to 324 and is carried out the full line amplification, isolates outputing to G1, G2, G3 through photoelectronic coupler.The output signal is a square-wave signal, with 380V alternating current same-phase.Current sampling is accomplished by the synchrotrans that are connected in parallel on the controllable silicon.
2, the relatively filtering output of composite signal of electric current, voltage-phase.
Voltage sampling signal G1 (getting 1 facies analysis) and current sampling signal be through N1 shaping anti-phase, obtains and synchronous 2 the anti-phase square-wave signals of electric moter voltage at 7 pin, 1 pin of N1.On 8 pin of N1,14 pin, obtain and synchronous 2 the anti-phase square-wave signals of motor current.The voltage that phase place is opposite, current signal addition (I, V homophase are output as zero, and I, the big more output voltage of V phase difference are high more) have just obtained the voltage signal that is directly proportional with the current/voltage phase difference.This composite signal is exported through R32, R31, R33, C23 filtering, and NA, NB filtering are amplified, and introduce W2, W4, from the 14 pin output of NB, deliver to 10 pin of N4 through R01 diode, R54.
3, zero-detection and sawtooth waveforms form 7 pin of Ni, the square-wave signal of l pin output, and another road forms a polarity and is negative needle-like pulse on C7, R25, C8,6 pin of R26 differential at N4, and this needle-like pulse is corresponding with the zero crossing of three-phase alternating current.Usually the 7 pin output voltages of N4 are born under the effect of needle-like pulse at N4,6 pin, and the positive pulse corresponding with the needle-like pulse appears in N4,7 pin.This positive pulse discharges and recharges on C13 through V19, V20, C13, R48 and forms and the synchronous negative sawtooth waveforms of power supply.
4, the synthetic amplification of controllable silicon phase-modulated signal and controllable silicon phase modulation output controllable silicon phase-modulated signal is synthetic is accomplished by N4, amplifies by G1, G4 and accomplishes.Involve the composite signal of reflecting voltage, current and phase difference with the synchronous negative sawtooth of power supply; Import from 9 pin and 10 pin of N4 respectively; Through N4 relatively, at square-wave signal of 8 pin output of N4, the width of square-wave signal receives the control of electric current and voltage phase difference; N12 forms the 7KHZ square wave and shakes from device, and its output signal is delivered to the base stage of G1 through R61.Square-wave signal is as a switching signal; Break-make through V25 control G1 base stage 7KHZ high-frequency signal; Controlled high-frequency signal amplifies through G1, G4; Pulse transformer is isolated the back and is triggered silicon controlled module, makes the angle of flow of silicon controlled module also receive the control of electric moter voltage, current and phase difference, thereby reaches the purpose according to load-rate of motor size adjustment power input to machine.
5, open-phase protection.
Induced current on the T4 instrument transformer becomes voltage through R172, forms 2 pin that a negative voltage is added to N6 through diode rectification, R92, C17 filtering, 3 pin of N6 give and being changed to-O.lV about.Pin voltage ratio 3 pin of N6 are low during operate as normal, 1 pin output high potential (2,3,1 pin of N6 is formed a comparator), and the voltage that instrument transformer is foretold when the motor phase shortage is zero.2 pin voltage ratios, 3 pin of N6 are high, and 1 pin output electronegative potential is cut off the KHZ high-frequency signal of G1 base stage through V37, R105, V42, and controllable silicon turn-offs, and reaches the purpose of protection motor.
6, soft start.
Current of electric, instrument transformer, diode, Rllo, N76,7 pin, N73,1 pin, N82, l pin, R155; V54, R70 form a close loop control circuit, and when the starting current increase, N76 pin voltage reduces; 7 pin voltages raise, and 3 pin voltages raise, and 1 pin voltage raises when being higher than the set point of 2 pin.N81 pin voltage reduces, and N410 pin voltage reduces, and thyristor operating angle reduces, and electric moter voltage reduces, and current of electric remains on the set point electric motor starting electric current also along with reduction.
7, overload protection.
During the set point of 8 pin of 12 pin of current of electric, instrument transformer, diode, R128, N7,14 pin, N8,10 pin, V56, R133 pin; The N714 pin is a low-voltage; Through R131, W6, C33 time-delay N88 pin is low-voltage; Through V56, R133 the 7KHZ high-frequency signal is cut off, controllable silicon turn-offs, the motor outage.
8, startup work is changed automatically.
During readiness; 10 pin of N9, the low 0.5V of 13 pin voltage ratios, 12 pin, the logic state of this moment is shown in icon, and the l pin of N9 is a high potential; Through V61 the power tracking of electricity-saving appliance is partly turn-offed; 10 pin of N11 are electronegative potential, through V49, V50 the overload protection of electricity-saving appliance are partly turn-offed, and this moment, electricity-saving appliance was a starting state.Behind electric motor starting; 10 pin of N9,13 pin voltages rise, and when being raised to when more taller than the 9 pin voltages of N9, entire circuit is overturn; The high potential of beginning becomes electronegative potential now; The electronegative potential of beginning becomes high voltage now, and electricity-saving appliance transfers operating state to by starting state, and this moment, actuating section was turned off.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with this technological people in the technical scope that the present invention disclosed; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (2)
1. the intelligent electric machine electricity-saving appliance is characterized in that, comprises that Power Regulation unit, voltage sampling unit, zero-detection unit, sawtooth waveforms form unit, Power Regulation signal synthesis unit, square-wave oscillator, phase demodulation unit, the first current sampling unit, diverter switch and the second current sampling unit; The second current sampling unit is connected with motor; The second current sampling unit also is connected with the Power Regulation unit, and the Power Regulation unit is connected with the first current sampling unit with the voltage sampling unit respectively, and voltage sampling unit, zero-detection unit, sawtooth waveforms form the unit and be connected successively with the Power Regulation signal synthesis unit; The second current sampling unit, phase demodulation unit and Power Regulation signal synthesis unit are connected successively; The voltage sampling unit also is connected with the phase demodulation unit, and the Power Regulation signal synthesis unit is connected with the Power Regulation unit through diverter switch, and square-wave oscillator is connected with diverter switch; Wherein
Voltage sampling unit, the first current sampling unit, the second current sampling unit, phase demodulation unit and Power Regulation signal synthesis unit are used to accomplish load-rate of motor and detect; Zero-detection unit, sawtooth waveforms form unit, Power Regulation signal synthesis unit, square-wave oscillator, and the Power Regulation unit is used to accomplish the power of motor adjustment.
2. intelligent electric machine electricity-saving appliance according to claim 1; It is characterized in that; Also comprise soft start unit, overload protection unit, phase-lacking protective unit, soft stop unit and start the running converting unit, the input of soft start unit, overload protection unit and phase-lacking protective unit is connected with the output of the second current sampling unit, and soft start unit, startup running converting unit are connected with the Power Regulation signal synthesis unit successively; The output of overload protection unit, phase-lacking protective unit and soft stop unit be connected with the Power Regulation unit through diverter switch; Wherein, the soft start unit is used for starting current is controlled at 1 to 2.5 times of rated current, and adjustable continuously; The overload protection unit is used for controllable silicon and turn-offs, the motor outage; Phase-lacking protective unit is used for controllable silicon turn-offs, the protection motor; The soft stop unit is used for the constant current slope soft stop of motor parking function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101493303A CN102811016A (en) | 2011-06-04 | 2011-06-04 | Intelligent motor power saver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101493303A CN102811016A (en) | 2011-06-04 | 2011-06-04 | Intelligent motor power saver |
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| CN102811016A true CN102811016A (en) | 2012-12-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184384A (en) * | 2014-09-03 | 2014-12-03 | 国家电网公司 | Efficient electricity-saving appliance of intelligent three-phase electric motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5097192A (en) * | 1990-07-09 | 1992-03-17 | Yamamoto Electric Corporation | Controller of a synchronous motor |
| EP1357657A1 (en) * | 2002-04-22 | 2003-10-29 | Micrel Société Anonyme | Stop control device for single-phase asynchronous motor with capacitor |
| CN1525638A (en) * | 2003-02-26 | 2004-09-01 | 徐联生 | Intelligent high performance power saver for motor |
| CN201294470Y (en) * | 2008-11-06 | 2009-08-19 | 乌鲁木齐希望电子有限公司 | Phase control intelligent electricity-saving controller for three-phase asynchronous motor |
-
2011
- 2011-06-04 CN CN2011101493303A patent/CN102811016A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5097192A (en) * | 1990-07-09 | 1992-03-17 | Yamamoto Electric Corporation | Controller of a synchronous motor |
| EP1357657A1 (en) * | 2002-04-22 | 2003-10-29 | Micrel Société Anonyme | Stop control device for single-phase asynchronous motor with capacitor |
| CN1525638A (en) * | 2003-02-26 | 2004-09-01 | 徐联生 | Intelligent high performance power saver for motor |
| CN201294470Y (en) * | 2008-11-06 | 2009-08-19 | 乌鲁木齐希望电子有限公司 | Phase control intelligent electricity-saving controller for three-phase asynchronous motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184384A (en) * | 2014-09-03 | 2014-12-03 | 国家电网公司 | Efficient electricity-saving appliance of intelligent three-phase electric motor |
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Application publication date: 20121205 |