CN201656913U - Closed loop control system used for adjusting power of motor - Google Patents
Closed loop control system used for adjusting power of motor Download PDFInfo
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- CN201656913U CN201656913U CN2010201872870U CN201020187287U CN201656913U CN 201656913 U CN201656913 U CN 201656913U CN 2010201872870 U CN2010201872870 U CN 2010201872870U CN 201020187287 U CN201020187287 U CN 201020187287U CN 201656913 U CN201656913 U CN 201656913U
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- 238000003079 width control Methods 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims description 41
- 238000005336 cracking Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 230000008901 benefit Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model relates to a closed loop control system used for adjusting power of a motor. Three-phase power sources are respectively connected with a pulse width control chopper triggering circuit module and a triggering circuit module, the pulse width control chopper triggering circuit module is respectively connected with a controlled motor and a power detecting device, the power detecting device is sequentially connected with an external light source and a fuzzy control device, the fuzzy control device is sequentially connected with the triggering circuit module and the pulse width control chopper triggering circuit module, the three-phase power circuits send synchronous signals to the inside of the triggering circuit module, and the power detecting device sends power factors to the inside of the external light source. The closed loop control system calculates power supply frequency of the asynchronous motor through detecting zero crossing points of voltage and current of the motor, processes the power supply frequency via the fuzzy control device, controls rotating speed of the motor through controlling pulse so as to achieve the purpose of reducing voltage and saving energy, and keeps property indexes in the motor stable.
Description
Technical field
The utility model relates to a kind of closed-loop control system, especially a kind of closed-loop control system that is used to regulate power of motor.
Background technology
At present, the motor that occurs on the market in use its every performance index be subjected to the influence of voltage fluctuation or load variations easily.During on the low side or load too high, every performance index of motor are lower than rated performance easily when voltage; When higher or load is on the low side when voltage, every performance index of motor are easily than rated performance height, this has just caused motor performance and running status instability when work, and motor just needs to increase substantially energy consumption in order to guarantee its stable running status, its shortcoming is the work quality that can badly influence motor, also can reduce the useful life of motor itself in addition.
The utility model content
At the weak point that exists in the above-mentioned technology, the utility model provides a kind of not only can play the step-down energy-saving effect to motor, can also make motor remain at a kind of closed-loop control system that is used to regulate power of motor of optimal operational condition.
For achieving the above object, the utility model provides a kind of closed-loop control system that is used to regulate power of motor, the output of three phase mains is connected with the input of pulse width control copped wave circuits for triggering module and circuits for triggering module respectively, the output of described pulse width control copped wave circuits for triggering module is connected with the input of controlled motor and power detection device respectively, the output of described power detection device is connected with the input of external light source and fuzzy control device successively, and the output of described fuzzy control device is connected with the input of described circuits for triggering module and described pulse width control copped wave circuits for triggering module successively.
Described three phase mains sends to described circuits for triggering inside modules with synchronizing signal.
Described power detection device sends to described external light source inside with power factor.
Described pulse width control copped wave circuits for triggering module is by power supply, chopper, motor, voltage detection module, current detection module, pulse trigger, single-chip microcomputer, keyboard and display unit constitute, the output of described power supply is connected with the input of described chopper and described voltage detection module respectively, the output of described chopper is connected with the input of described motor and described current detection module respectively, described voltage detection module all is connected with the input of described single-chip microcomputer with the output of described current detection module, and the output of described keyboard and described display unit is connected with the input that described single-chip microcomputer and described pulse cracking are sent out device successively.
Compared with prior art, the utlity model has following advantage:
The closed-loop control system that is used to regulate power of motor that the utility model provides, the output of three phase mains is connected with the input of pulse width control copped wave circuits for triggering module and circuits for triggering module respectively, the output of pulse width control copped wave circuits for triggering module is connected with the input of controlled motor and power detection device respectively, the output of power detection device is connected with the input of external light source and fuzzy control device successively, the output of fuzzy control device is connected with the input of circuits for triggering module and pulse width control copped wave circuits for triggering module successively, three phase mains sends to the circuits for triggering inside modules with synchronizing signal, and power detection device sends to external light source inside with power factor.The utility model stability is good, by the voltage of motor and the zero crossing of electric current are detected, calculate the power-factor angle of asynchronous machine, handle through fuzzy control device, control motor speed to reach the energy-conservation effect of step-down by the control trigger impulse, can also make motor remain at optimal operational condition.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is the example structure block diagram of Fig. 1;
Fig. 3 is the structured flowchart of the utility model pulse width control copped wave circuits for triggering module;
Fig. 4 is the circuit diagram of current detection module among Fig. 3;
Fig. 5 is the circuit diagram of voltage detection module among Fig. 3;
Fig. 6 is the circuit diagram of the utility model power detection device.
The main element symbol description is as follows:
1 three phase mains, 2 pulse width control copped wave circuits for triggering modules, 3 motors
4 circuits for triggering modules, 5 power detection devices, 6 fuzzy control devices
7 light sources, 8 power supplys, 9 choppers
10 motor, 11 voltage detection module, 12 pulse triggers
13 current detection modules, 14 single-chip microcomputers, 15 keyboards
16 liquid crystal displays, 17 synchronizing signals, 18 power factors
19 set-points
Embodiment
For clearer statement the utility model, the utility model will be further described below in conjunction with accompanying drawing.
As shown in Figure 1 to Figure 3, the utility model provides a kind of closed-loop control system that is used to regulate power of motor, the output of three phase mains 1 is connected with the input of pulse width control copped wave circuits for triggering module 2 and circuits for triggering module 4 respectively, the output of pulse width control copped wave circuits for triggering module 2 is connected with the input of controlled motor 3 and power detection device 5 respectively, the output of power detection device 5 successively with light source 7 in negative pole end and the input of fuzzy control device 6 be connected, the output of fuzzy control device 6 is connected with the input of circuits for triggering module 4 and pulse width control copped wave circuits for triggering module 2 successively.In addition, the input of positive terminal also is connected with the output of set-point 19 in the light source 7.Three phase mains 1 sends to the inside of circuits for triggering module 4 with synchronizing signal 17, and power detection device 5 sends to power factor 18 inside of negative pole end in the light source.
Pulse width control copped wave circuits for triggering module is by power supply 8, chopper 9, motor 10, voltage detection module 11, current detection module 13, pulse trigger 12, single-chip microcomputer 14, keyboard 15 and liquid crystal display 16 constitute, wherein, the output of power supply 8 is connected with the input of chopper 9 and voltage detection module 11 respectively, the output of chopper 9 is connected with the input of motor 10 and current detection module 13 respectively, voltage detection module 11 all is connected with the input of single-chip microcomputer 14 with the output of current detection module 13, and the output of keyboard 15 and liquid crystal display 16 is connected with the input of single-chip microcomputer 14 with pulse trigger 12 successively.
As shown in Figure 4, by the alternating current of instrument transformer L1 output 0-5mA, when electric current increased suddenly, the current transformer output current also increased thereupon, through full-bridge rectification, electric current-voltage transitions, low-pass filtering, obtained d. c. voltage signal.When zero crossing, high level of ZD end output makes the master control chip trigger an interruption, promptly detects current zero-crossing signal like this.
As shown in Figure 5, zero cross detection circuit at first detects the zero crossing of AC220V, produces zero passage and interrupts; Then, in the Interrupt Process subprogram, open timer function, produce a trigger impulse by CPU then.Can carry out the design of algorithm this moment, and like this, the change of the timing length by timer can be controlled the ON time of AC220V in every half period, thus the control motor.
As shown in Figure 6, the power factor checkout gear mainly is that the zero crossing to motor phase voltage and phase current detects, in the Energy Saving Control, detection to power-factor angle is the key that realizes pressure regulating energy-saving, by judging the size of power-factor angle, can realize the adjusting of chopper pulse duration by control voltage.Because of asynchronous motor is an inductive load, the just zero passage of a delay angle electric current of behind voltage zero-cross, still needing, its angle is power-factor angle.Voltage zero-cross detects and exactly input voltage is converted to synchronous square wave, sends into the high speed input of CPU, and the trailing edge of this square wave is the reference signal of trigger impulse, can be used as the commencing signal of microprocessor software timer again.It is converting square wave by current signal to after by the instrument transformer acquisition process, sending into the high speed input of microprocessor then, and obtain a power-factor angle by the voltage and current zero-crossing timing of record that current over-zero detects.The voltage and current sample circuit is shown in figure below voltage, current over-zero testing circuit figure, with A is example mutually, and to the sampling of A phase voltage, phase voltage is by V1, V2 voltage stabilizing, if entering comparator compares with ground. at the positive half cycle of waveform, then comparator is exported high level 1; If at negative half period, then output comparator is a low level 0.In output signal when being high, make the conducting of light idol, entering CPU imports 1 signal at a high speed and just is high level, realize that like this voltage over zero detects. to the detection of current signal is detection to chopper two ends current signal, by a current transformer current signal is sampled, after by comparator the phase information of current zero-crossing point being converted to square-wave signal, send into CPU and import 2 at a high speed, realize that current over-zero detects.
The utility model produces interrupt signal by detecting synchronizing signal when zero crossing, timing begins; Power detection device is write down the zero crossing of electric current and voltage, obtain the power-factor angle of motor, calculate the rate of change of power-factor angle simultaneously, pass to fuzzy control device, fuzzy control device carries out fuzzy operation and obtains trigger angle, timing finishes, obtain a time deviation, it is the triggered time, trigger chopper by the circuits for triggering module then, after the advanced pulse modulation technology of utilization carries out inversion to power frequency supply, regulate frequency of supply, direct drive motors also carries out speed governing, provides power with optimum rotational speed and torque to fluid device.In the control procedure, detect by zero crossing asynchronous machine phase voltage and phase current, calculate the power-factor angle of asynchronous machine, handle, regulate frequency of supply by pulse modulation technology and control motor speed to reach the step-down purpose of energy saving through fuzzy controller.
More than disclosed only be several instantiation of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection range of the present utility model.
Claims (4)
1. closed-loop control system that is used to regulate power of motor, it is characterized in that, the output of three phase mains is connected with the input of pulse width control copped wave circuits for triggering module and circuits for triggering module respectively, the output of described pulse width control copped wave circuits for triggering module is connected with the input of controlled motor and power detection device respectively, the output of described power detection device is connected with the input of external light source and fuzzy control device successively, and the output of described fuzzy control device is connected with the input of described circuits for triggering module and described pulse width control copped wave circuits for triggering module successively.
2. a kind of closed-loop control system that is used to regulate power of motor as claimed in claim 1 is characterized in that described three phase mains sends to described circuits for triggering inside modules with synchronizing signal.
3. a kind of closed-loop control system that is used to regulate power of motor as claimed in claim 1 is characterized in that described power detection device sends to described external light source inside with power factor.
4. as claim 1 or 3 described a kind of closed-loop control systems that are used to regulate power of motor, it is characterized in that, described pulse width control copped wave circuits for triggering module is by power supply, chopper, motor, voltage detection module, current detection module, pulse trigger, single-chip microcomputer, keyboard and display unit constitute, the output of described power supply is connected with the input of described chopper and described voltage detection module respectively, the output of described chopper is connected with the input of described motor and described current detection module respectively, described voltage detection module all is connected with the input of described single-chip microcomputer with the output of described current detection module, and the output of described keyboard and described display unit is connected with the input that described single-chip microcomputer and described pulse cracking are sent out device successively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201872870U CN201656913U (en) | 2010-05-12 | 2010-05-12 | Closed loop control system used for adjusting power of motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201872870U CN201656913U (en) | 2010-05-12 | 2010-05-12 | Closed loop control system used for adjusting power of motor |
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| CN201656913U true CN201656913U (en) | 2010-11-24 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102752901A (en) * | 2011-04-20 | 2012-10-24 | 英飞特电子（杭州）股份有限公司 | Two-line light modulator and control method thereof |
| CN103249200A (en) * | 2012-02-03 | 2013-08-14 | 英飞特电子（杭州）股份有限公司 | Method for controlling light modulation device |
| CN104237616A (en) * | 2014-09-22 | 2014-12-24 | 深圳市安邦信电子有限公司 | Voltage and current zero crossing point detection circuit of motor |
| CN105553367A (en) * | 2016-02-03 | 2016-05-04 | 深圳创维空调科技有限公司 | Air conditioner-based speed regulation method and speed regulation system for PG motor and air conditioner |
| CN108551289A (en) * | 2017-10-25 | 2018-09-18 | 中国石油化工股份有限公司 | Asynchronous motor is depressured the subregion multiplexed control system and control method of energy-saving appliance |
| CN109713979A (en) * | 2018-12-22 | 2019-05-03 | 苏州厚盟电子科技有限公司 | A kind of ON-OFF control circuit for reducing drain motor noise |
-
2010
- 2010-05-12 CN CN2010201872870U patent/CN201656913U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102752901A (en) * | 2011-04-20 | 2012-10-24 | 英飞特电子（杭州）股份有限公司 | Two-line light modulator and control method thereof |
| CN102752901B (en) * | 2011-04-20 | 2015-08-19 | 英飞特电子（杭州）股份有限公司 | A kind of two-wire dimmer and control method thereof |
| CN103249200A (en) * | 2012-02-03 | 2013-08-14 | 英飞特电子（杭州）股份有限公司 | Method for controlling light modulation device |
| CN103249200B (en) * | 2012-02-03 | 2015-04-01 | 英飞特电子（杭州）股份有限公司 | Method for controlling light modulation device |
| CN104237616A (en) * | 2014-09-22 | 2014-12-24 | 深圳市安邦信电子有限公司 | Voltage and current zero crossing point detection circuit of motor |
| CN104237616B (en) * | 2014-09-22 | 2017-11-17 | 深圳市安邦信电子有限公司 | Electric moter voltage current zero-crossing point detects circuit |
| CN105553367A (en) * | 2016-02-03 | 2016-05-04 | 深圳创维空调科技有限公司 | Air conditioner-based speed regulation method and speed regulation system for PG motor and air conditioner |
| CN105553367B (en) * | 2016-02-03 | 2018-02-13 | 深圳创维空调科技有限公司 | A kind of PG motor speed regulating methods, governing system and air-conditioning based on air-conditioning |
| CN108551289A (en) * | 2017-10-25 | 2018-09-18 | 中国石油化工股份有限公司 | Asynchronous motor is depressured the subregion multiplexed control system and control method of energy-saving appliance |
| CN109713979A (en) * | 2018-12-22 | 2019-05-03 | 苏州厚盟电子科技有限公司 | A kind of ON-OFF control circuit for reducing drain motor noise |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LOONG EXPRESS (BEIJING) TECHNOLOGY DEVELOPMENT CO. Free format text: FORMER OWNER: LIU YUEBING Effective date: 20120531 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100730 DONGCHENG, BEIJING TO: 100005 DONGCHENG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120531 Address after: 100005 Beijing City, Dongcheng District Chaoyang Gate South Street No. 2 Building 4 room 512 Patentee after: Longtian Yuntong (Beijing) Technology Development Co., Ltd. Address before: Zifeng Building 1 No. 100730 Beijing Dongcheng District Yabao alley 4008 Patentee before: Liu Yuebing |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20130512 |