CN201290092Y - Pressure-regulating and energy-saving controller for asynchronous motor - Google Patents
Pressure-regulating and energy-saving controller for asynchronous motor Download PDFInfo
- Publication number
- CN201290092Y CN201290092Y CNU2008201859402U CN200820185940U CN201290092Y CN 201290092 Y CN201290092 Y CN 201290092Y CN U2008201859402 U CNU2008201859402 U CN U2008201859402U CN 200820185940 U CN200820185940 U CN 200820185940U CN 201290092 Y CN201290092 Y CN 201290092Y
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- energy
- voltage
- saving
- motor
- voltage regulating
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The utility model relates to a voltage regulating and energy-saving controller for an asynchronous motor, which is suitable for a variable frequency transmission system in industrial and agricultural production. Mostly, an energy-saving start controller for a generally known asynchronous motor outputs trigger pulse of a thyristor based on the zero-crossing point of voltage signals of a power supply, and adjusts the terminal voltage of the motor, thereby achieving the purpose of energy-saving. An experimental research indicates that a phenomenon of the concussion of the current and the rotating speed of the motor occurs easily when light load soft start and voltage regulating and energy-saving control are performed on the motor by adopting the voltage regulating method. The voltage regulating and energy-saving controller comprises a trigger pulse drive circuit, a current synchronization signal detection circuit, a supply voltage synchronization signal detection circuit, a controller power supply and failure detection circuit, a control chip and a power thyristor, and has the advantages that the concussion phenomenon during voltage regulating process of voltage synchronization signal is avoided, the whole circuit structure becomes simpler by adopting a power factor for the voltage regulating energy-saving control signal, and the implementation and the operation are easy.
Description
Technical field
The utility model relates to a kind of voltage-regulating and energy-saving controller for asynchronous motor, is applicable to the Frequency Drive system in the industrial and agricultural production.Belong to electrician, machine field.
Background technology
The energy-conservation starter controller of known asynchronous motor, many is the trigger impulse of benchmark output thyristor with the power source voltage cycle signal zero-cross point, the terminal voltage of regulating motor reaches purpose of energy saving.Experimental study shows, occurs the phenomenon of current of electric and rotating speed concussion when adopting this voltage regulating mode that motor is carried out underloading soft start and pressure regulating energy-saving control easily.Thereby people urgently wish to have a kind of energy-saving controller that can overcome above-mentioned defective to come out.
Summary of the invention
In order to adopt simple circuit configuration and rational controlled quentity controlled variable realization asynchronous motor to stablize the purpose of soft start and the operation of underloading pressure regulating energy-saving, the utility model provides a kind of voltage-regulating and energy-saving controller for asynchronous motor.
To achieve these goals, the technical solution of the utility model is to be made of trigger impulse drive circuit, current synchronous signal testing circuit, supply voltage synchronization signal detection circuit, controller power source and failure detector circuit, control chip, power scr.It is characterized in that the power scr of connecting respectively between the motor of three phase mains and asynchronous motor, the current synchronous signal testing circuit is in parallel with power scr; The input of controller power source and failure detector circuit and power supply A are mutually, B is connected, and its output links to each other with control chip; The input of supply voltage synchronization signal detection circuit is connected with three phase mains, and its signal outputs to control chip; The signal of current synchronous signal testing circuit outputs to control chip; The signal of control chip outputs to the trigger impulse drive circuit, and the trigger impulse drive circuit is connected with two trigger ends of power scr.
The beneficial effects of the utility model are: avoid that reforming phenomena appears in motor in voltage synchronizing signal pressure regulation process, adopt power factor to make integrated circuit relatively simple for structure for the pressure regulating energy-saving control signal, easy to implement and operation.
Description of drawings
Accompanying drawing 1 is a structure chart of the present invention
Accompanying drawing 2 is the circuit diagram of current synchronous signal testing circuit among the present invention
Accompanying drawing 3 is the circuit diagram of trigger impulse drive circuit among the present invention
Accompanying drawing 4 is the circuit diagram of supply voltage synchronization signal detection circuit among the present invention
In the accompanying drawing, 1,3,5 trigger impulse drive circuits, 2,4,6 current synchronous signal testing circuits, 7 supply voltage synchronization signal detection circuits, 8 controller power sources and failure detector circuit, 9 control chips, 10,11,12 power scrs, 13 asynchronous motor motors.
Embodiment
Carefully connect the wire by the sign on the utility model, energising back controller power source and failure detector circuit 8 are for the invention provides power supply.Three phase mains forms the loop by the RC absorption circuit in the current synchronous signal testing circuit 2,4,6 before the thyristor conducting, this moment, the signal of current synchronous signal testing circuit 2,4,6 outputs was the crossover point signal of three-phase voltage, and this signal is used to judge the phase sequence of power supply.Control chip 9 judges that according to the signal of being surveyed 7 slowdown monitoring circuits of supply voltage synchronization signal detection circuit are the A phase, with A phase voltage synchronizing signal is reference, by trigger impulse drive circuit 1,3,5, send A sequentially, B, power scr 10 in the C three-phase circuit, 11,12 trigger impulse, make electrical power, in case there is electric current to flow through power scr 10,11,12, current synchronous signal testing circuit 2,4,6 detected signals are current synchronous signal just, this moment, reference data was changed to current synchronous signal, adjust each phase start pulse signal, electric moter voltage is progressively raise, realize electric machine soft starting.
After the motor stabilizing operation, do not disappear in order to make current synchronous signal, so power scr 10,11,12 conductings entirely.Relatively but the time difference of the A phase voltage crossover point signal of the A phase current crossover point signal of current synchronous signal testing circuit 2 detections and 7 detections of supply voltage synchronization signal detection circuit is the time parameter at the power scale factor angle of asynchronous machine, utilize control chip 9 to be converted to the power factor parameter, be used for underloading pressure regulating energy-saving Control Parameter.Because the electric current of pressure regulation rear motor is a nonsinusoidal waveform, so this value is not the actual power factor of motor, but the size and the load state of its reflection power factor.If control chip 9 judges that according to this power factor size motor is in the light running situation, increase the trigger angle of thyristor by trigger impulse drive circuit 1,3,5, reduce the voltage of motor, guaranteed output factor back in a suitable scope keeps trigger angle, and this moment, input voltage and load were complementary.If load this moment increases, control chip 9 will reduce the trigger angle of thyristor according to the variation of power factor by trigger impulse drive circuit 1,3,5, the voltage of motor is increased, after a suitable scope, keep trigger angle constant up to power factor, this moment, motor operated in the matching voltage value of this load, thereby guarantee that motor is operated in the near optimal matching voltage in whole loading range, reach the purpose of dynamic energy-saving.
Supply voltage synchronization signal detection circuit 7 and controller power source and failure detector circuit 8 are in conjunction with judging whether protections such as phase shortage and motor overheating to occur normally total head operation of timely bypass assurance motor when thyristor breaks down.
Claims (1)
1, a kind of voltage-regulating and energy-saving controller for asynchronous motor is characterized in that the power scr of connecting respectively between the motor of three phase mains and asynchronous motor, and the current synchronous signal testing circuit is in parallel with power scr; The input of controller power source and failure detector circuit and power supply A are mutually, B is connected, and its output links to each other with control chip; The input of supply voltage synchronization signal detection circuit is connected with three phase mains, and its signal outputs to control chip; The signal of current synchronous signal testing circuit outputs to control chip; The signal of control chip outputs to the trigger impulse drive circuit, and the trigger impulse drive circuit is connected with two trigger ends of power scr.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201859402U CN201290092Y (en) | 2008-09-10 | 2008-09-10 | Pressure-regulating and energy-saving controller for asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201859402U CN201290092Y (en) | 2008-09-10 | 2008-09-10 | Pressure-regulating and energy-saving controller for asynchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201290092Y true CN201290092Y (en) | 2009-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201859402U Expired - Fee Related CN201290092Y (en) | 2008-09-10 | 2008-09-10 | Pressure-regulating and energy-saving controller for asynchronous motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN201290092Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964651A (en) * | 2010-09-03 | 2011-02-02 | 北京时代民芯科技有限公司 | Controlled silicon zero-voltage turn-on module of temperature control electric blanket and implementation method thereof |
| CN102111096A (en) * | 2011-02-28 | 2011-06-29 | 宜昌清江电气有限公司 | Method for preventing asynchronous motor from shocking during soft start |
| CN102522946A (en) * | 2012-01-06 | 2012-06-27 | 神华集团有限责任公司 | Method, device and system for controlling fan motor |
| CN102035459B (en) * | 2009-09-28 | 2012-09-05 | 郭文丽 | Intelligent motor controller |
-
2008
- 2008-09-10 CN CNU2008201859402U patent/CN201290092Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035459B (en) * | 2009-09-28 | 2012-09-05 | 郭文丽 | Intelligent motor controller |
| CN101964651A (en) * | 2010-09-03 | 2011-02-02 | 北京时代民芯科技有限公司 | Controlled silicon zero-voltage turn-on module of temperature control electric blanket and implementation method thereof |
| CN101964651B (en) * | 2010-09-03 | 2012-06-27 | 北京时代民芯科技有限公司 | Controlled silicon zero-voltage turn-on module of temperature control electric blanket and implementation method thereof |
| CN102111096A (en) * | 2011-02-28 | 2011-06-29 | 宜昌清江电气有限公司 | Method for preventing asynchronous motor from shocking during soft start |
| CN102111096B (en) * | 2011-02-28 | 2013-12-04 | 宜昌清江电气有限公司 | Method for preventing asynchronous motor from shocking during soft start |
| CN102522946A (en) * | 2012-01-06 | 2012-06-27 | 神华集团有限责任公司 | Method, device and system for controlling fan motor |
| CN102522946B (en) * | 2012-01-06 | 2015-06-10 | 神华集团有限责任公司 | Method, device and system for controlling fan motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090812 |