CN201282444Y - 380V three-phase motor phase control electricity-saving device - Google Patents
380V three-phase motor phase control electricity-saving device Download PDFInfo
- Publication number
- CN201282444Y CN201282444Y CNU2008202123735U CN200820212373U CN201282444Y CN 201282444 Y CN201282444 Y CN 201282444Y CN U2008202123735 U CNU2008202123735 U CN U2008202123735U CN 200820212373 U CN200820212373 U CN 200820212373U CN 201282444 Y CN201282444 Y CN 201282444Y
- Authority
- CN
- China
- Prior art keywords
- motor
- circuit
- electricity
- phase
- microprocessor
- Prior art date
- 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
Links
Images
Landscapes
- Motor And Converter Starters (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model provides a 380V phase-control electricity-saving device for a three-phase motor, which comprises a transformer, a microprocessor, a motor voltage synchronization detection circuit, a motor current synchronization phase angle detection circuit, a controllable silicon trigger control circuit and a guard circuit for motor stall, wherein, the controllable silicon trigger control circuit comprises three two-way silicon controlled modules which are arranged on the input terminals of a three-phase power supply of the motor respectively. The electricity-saving device has the beneficial effects that the lock-rotor and the stall of a motor can not occur when the device is used in a device with a large load-change motor; the device can carry out automatic following control without manual adjustment, monitor and protect the motor in real time, adopts soft start to the motor, and effectively reduce the inrush current to an electric network caused by the start of the motor; and the start time can be adjusted in a range of 0.5 to 120s.
Description
Technical field
The utility model relates to a kind of electric motor saver, relates to the phased electricity-saving appliance of a kind of 380V three phase electric machine particularly.
Background technology
Existing motor power saving product has frequency converter and three-phase motor power saver, because frequency converter is to adopt the adjusting rotating speed of motor to reach energy-conservation, energy-conservation efficient and effect are not good enough; And existing three-phase motor power saver technology is to adopt current transformer detection electric current and voltage fixed value to realize the comparison of electric current and voltage, control the voltage and current of motor, current transformer is must wait until after current of electric changes output signal is just arranged when detecting real-time current, time cycle is long, and make easily motor generation stall and power that motor load changes are greatly refused enough to cause motor stall.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of 380V three phase electric machine phased electricity-saving appliance, solution can not change at motor speed, motor load change greatly disintegrating machine and equipment such as punch press on the motor rotation blockage and the power that occur refuse enough problems.
The utility model is achieved through the following technical solutions goal of the invention; the phased electricity-saving appliance of a kind of 380V three phase electric machine; comprise transformer; microprocessor; electric moter voltage synchronization testing circuit; current of electric synchronization phase angle testing circuit; controllable silicon trigger control circuit and motor stall protective circuit; transformer connection mains supply and output AC electricity are to microprocessor and above-mentioned each circuit supply; microprocessor connects control electric moter voltage synchronization testing circuit; current of electric synchronization phase angle testing circuit; controllable silicon trigger control circuit and motor stall protective circuit; described controllable silicon trigger control circuit comprises three bidirectional triode thyristor modules, and three bidirectional triode thyristor modules are separately positioned on the three phase supply power input of motor.
The phased electricity-saving appliance of 380V three phase electric machine described in the utility model is to realize controlling by the phase angle that changes motor, the phased electricity-saving appliance of motor with the current hysteresis that detects after waveform after microprocessor processes, adopts adjustment silicon controlled pulse-triggered, voltage and current is reduced to maintenance be complementary, the operational efficiency of motor is improved with the motor load constant torque.Reduce the meritorious power consumption of motor waste.
When voltage (V) and electric current (A) are all represented with the phasor form, angle between the two is the phase angle, can represent the amount of electric current lagging voltage, for induction machine, electric current lags behind voltage usually, uses the triangle relation of the electric current lagging voltage of power factor (QPF) expression quantification usually.Motor is under different loading conditions, and the phase angle will change thereupon, the load current lagging voltage 30% of common motor, electric current lagging voltage 80% when unloaded.The phased electricity-saving appliance of motor is by the phase angle between electric moter voltage synchronization testing circuit and current of electric synchronization phase angle testing circuit continuous detecting electric moter voltage and the electric current, after microprocessor processes, adopt and adjust the silicon controlled pulse-triggered, voltage and current is reduced to maintenance to be complementary with the motor load constant torque, the operational efficiency of motor is improved, reduce the meritorious power consumption of motor waste simultaneously.Changing the phase angle is by thyristor gating circuit and thyristor regulation voltage waveform, only allows the positive half cycle of alternating voltage waveform in the bidirectional triode thyristor module and a part of voltage supply motor of negative half period to realize after microprocessor calculates.Microprocessor adopts the back-emf of motor to monitor the continuity of motor load situation of change with holding current by the stall protection circuit simultaneously, avoids the motor stall situation to occur.
Described microprocessor also is connected with a watchdog timer, is used for the accuracy that monitor microprocessors software carries out, and software is resetted and resets.
The enabling signal port of described microprocessor also is connected with an electricity-saving appliance start-up circuit, and described electricity-saving appliance start-up circuit comprises photoelectrical coupler, inverter and the indicator light of being controlled by relay.
Described transformer alternating electricity output also is connected with rectification circuit and filter circuit, is connected to microprocessor and described each circuit is powered.
The beneficial effects of the utility model are:
1, use can not cause motor rotation blockage and motor stall on motor load variation equipment greatly;
2, do not change electric machine operating characteristic and motor speed, data setting is good, and tracking Control does not need artificial adjusting automatically;
3,, when appearring in motor, phase shortage, overcurrent, phenomenon such as under-voltage can in 5 seconds, carry out protection to motor monitoring in real time and protection;
4, motor is adopted soft start, the impulse current that when effectively reducing electric motor starting electrical network is produced, 0.5-120 seconds start-up times are adjustable.
Description of drawings
Fig. 1, the utility model circuit control block diagram.
Fig. 2, the electricity-saving appliance power supply circuit.
Fig. 3,4, electricity-saving appliance start-up circuit figure.
Fig. 5, electric moter voltage synchronization testing circuit figure.
Fig. 6, current of electric synchronization phase angle testing circuit figure.
Fig. 7, controllable silicon trigger control circuit figure.
Fig. 8, motor stall protective circuit figure.
Fig. 9, the watchdog timer circuit diagram.
Among the figure, 1 transformer, 2 microprocessors, 3 electric moter voltage synchronization testing circuits, 4 current of electric synchronization phase angle testing circuits, 5 controllable silicon trigger control circuit, 6 motor stall protective circuits, 7 mains supplies, 8 motors, 9 three phase supply power supplys, 10 enabling signal ports, 11 start-up circuits.
Embodiment
Referring to accompanying drawing 1; the phased electricity-saving appliance of a kind of 380V three phase electric machine; comprise transformer 1; microprocessor 2; electric moter voltage synchronization testing circuit 3; current of electric synchronization phase angle testing circuit 4; controllable silicon trigger control circuit 5 and motor stall protective circuit 6; transformer 1 connection mains supply 7 and output AC electricity are to microprocessor 1 and above-mentioned each circuit supply; microprocessor 1 connects control electric moter voltage synchronization testing circuit 3; current of electric synchronization phase angle testing circuit 4; controllable silicon trigger control circuit 5 and motor stall protective circuit 6; described controllable silicon trigger control circuit 5 comprises three bidirectional triode thyristor modules; three bidirectional triode thyristor modules are separately positioned on three phase supply power supply 9 inputs of motor 8, and the enabling signal port one 0 of microprocessor is connected with electricity-saving appliance start-up circuit 11.
Be specifically described below in conjunction with the operation principle of accompanying drawing described electricity-saving appliance.
A. the power supply of microprocessor and each circuit power supply, referring to accompanying drawing 2, transformer output 12V alternating current, this voltage produces level and smooth DC15V voltage by rectifier BR1 rectification and capacitor C 1 and C2 filtering.DC15V also is voltage stabilizing triode VR1 power supply for thyristor gating circuit and relay provide power supply, and VR1 output+5V, capacitor C 3 and C4 are the filter capacitors of 5V power supply, through the Z1 voltage stabilizing, and generation DC5V stabilized voltage power supply.+ 5V voltage is to provide power supply for microprocessor.
B. the startup of the phased electricity-saving appliance of motor referring to accompanying drawing 3, before the phased electricity-saving appliance of actuating motor, be guaranteed to install errorless.Behind the contact jaw 1 and 2 short circuits of Conn7A, DC15V passes through IC9.Resistance R 1, IC9 provides power supply for photoelectrical coupler.Triode conducting in the photoelectrical coupler.(16) of IC1 are level "0", start starting sequence.
Referring to accompanying drawing 4, microprocessor IC1 is not as detecting any fault, and IC1 (27) is just pin can be exported level "0", and (11) pin of inverter ic 5 becomes high level, makes RL1 energising adhesive and lights L1, the operation beginning.Simultaneously, (26) pin of IC1 is exported " 0 ", and display lamp L4 is lighted, until mistake of the selected starting time.Own mistake of starting time, after L4 extinguishes, (32) pin of IC1 output " 0 ", and (15) pin of inverter ic 2 is subjected to the triggering of IC1-(32) level, the adhesive of relay R L2 electricity.(33) pin of IC1 is exported " 0 ", and display lamp L5 is lighted.
C. the electric moter voltage synchronization detects, and referring to accompanying drawing 5, triggers for making microprocessor can correctly control silicon controlled, and the zero crossing that microprocessor is got the A phase voltage is triggering signal (PHA of CONN2 port).The A phase voltage is through resistance R 6 and R7 to 0.25V, and making logic numeral ic chip 11 pin is low level.As A during at negative half period, logic numeral ic chip 11 is " 1 ", otherwise but as A during at negative half period.So at PHA is square wave.This signal can be sent to microprocessor IC1 (25) pin, by IC1 trigger B mutually with C mutually.
D. electric current synchronization phase angle is detected, referring to accompanying drawing 6, after the first phase control of motor, because the power factor of motor is ceaselessly changing, so microprocessor can change the control point into the zero crossing of electric current when loading and operation.The sampling mode of power factor is as than effect with the fixed value of voltage over zero and current zero-crossing point.In order to detect the phase angle of electric current lagging voltage, reflect the loading condition of motor.Photoelectrical coupler IC6 detects the controllable silicon both end voltage, and this voltage waveform identical with electric current can be delivered to microprocessor IC1 (34) pin, (seeing also Fig. 6).At this moment, microprocessor can change the power factor that impulse train cooperates motor in response to the form detection signal position (seeing also Fig. 5) of voltage wave.
E. controllable silicon triggers control, and referring to accompanying drawing 7, (39) pin of microprocessor IC1 is an A phase power supply triggering signal, and (6) pin of inverter ic 2 returns signal.By pulse, and R9 triggers the A phase silicon controlled positive and negative utmost point to pulse converter PT1 by IC4, and trigger impulse is an impulse train with per 15 120uS, guarantees the silicon controlled normally.(seeing also Fig. 6).B is mutually identical with A with C phase operation principle mutually.
F. motor stall protective circuit, referring to accompanying drawing 8, the phased electricity-saving appliance of motor is to adopt the back-emf of motor to monitor the motor load situation of change, (12) heel of microprocessor IC1 is combined the variation of motor reaction gesture.When optimization state and impact load, it is discontinuous that electric current can become.The rectangular wave that (10) human hair combing waste of IC2 goes out, and change the continuity that its trigger angle is come holding current, avoid the motor stall situation to occur.
G. watchdog timer function, referring to accompanying drawing 9, (7) pin of memory IC 3 is to be used for the correct procedure that monitoring software carries out, and pin normally sends pulse when each work period microprocessor IC1 (24), and (9) pin of microprocessor IC1 can keep closing the state of closing.The 7th pin as memory IC 3 is when not receiving due pulse because of any situation, and (5) pin of memory IC 3 will become one second of " 1 " current potential, make (9) pin of IC1 enter pattern 1, and software is reset.Microprocessor+the 5V power supply also monitored by IC3.Suddenly descend as main power voltage, when detected voltage is lower than 4.6V and above 1S, (5) pin of memory IC 3 will become " 1 " current potential, and (9) pin of microprocessor IC1 also will enter pattern 1, and software is reset.
The result of use of this phased electricity-saving appliance on the jaw crusher of the two sharp iron ores of West Inner Mongolia mining industry is remarkable, because very big of jaw crusher load variations, zero load, fully loaded and overburden three phases are in seconds arranged, if the speed at detected phase angle and control time are greater than 40 microseconds, motor can cause power to refuse enough to make motor rotation blockage and stall, and long-time use can be burnt motor.And this novel phased electricity-saving appliance of motor is installed in and has used the time more than 1 year on the jaw crusher of this iron ore 220KW, disintegrating machine does not have phenomenons such as stall and stall, electric current when this disintegrating machine is unloaded drops to 72A from 160A, and voltage 396V drops to 320V, active power 86KW drops to 59KW.
At the Shandong Shengli Oil Field, because pump load changes also very greatly, oil pumper work one-period have half be half load half for fully loaded, 55KW oil pumper phase electric current weekly changes at 25-87A, on average per hour electricity consumption at 12Kw/h, the phase electric current was in 12-69A variation weekly after this novel phased electric motor saver was installed, and on average per hour power consumption is 9.2kw/h.
Claims (4)
1 one kinds of phased electricity-saving appliances of 380V three phase electric machine; it is characterized in that: described electricity-saving appliance comprises transformer; microprocessor; electric moter voltage synchronization testing circuit; current of electric synchronization phase angle testing circuit; controllable silicon trigger control circuit and motor stall protective circuit; transformer connection mains supply and output AC electricity are to microprocessor and above-mentioned each circuit supply; microprocessor connects control electric moter voltage synchronization testing circuit; current of electric synchronization phase angle testing circuit; controllable silicon trigger control circuit and motor stall protective circuit; described controllable silicon trigger control circuit comprises three bidirectional triode thyristor modules, and three bidirectional triode thyristor modules are separately positioned on the three phase supply power input of motor.
The phased electricity-saving appliance of 2 a kind of 380V three phase electric machines according to claim 1, it is characterized in that: described microprocessor also is connected with a watchdog timer.
The phased electricity-saving appliance of 3 a kind of 380V three phase electric machines according to claim 1, it is characterized in that: the enabling signal port of described microprocessor also is connected with an electricity-saving appliance start-up circuit, and described electricity-saving appliance start-up circuit comprises photoelectrical coupler, inverter and the indicator light of being controlled by relay.
4 according to claim 1, the phased electricity-saving appliance of 2 or 3 described a kind of 380V three phase electric machines, it is characterized in that: described transformer alternating electricity output also is connected with rectification circuit and filter circuit, is connected to microprocessor and described each circuit is powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202123735U CN201282444Y (en) | 2008-09-27 | 2008-09-27 | 380V three-phase motor phase control electricity-saving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202123735U CN201282444Y (en) | 2008-09-27 | 2008-09-27 | 380V three-phase motor phase control electricity-saving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201282444Y true CN201282444Y (en) | 2009-07-29 |
Family
ID=40929310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202123735U Expired - Fee Related CN201282444Y (en) | 2008-09-27 | 2008-09-27 | 380V three-phase motor phase control electricity-saving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201282444Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102902259A (en) * | 2012-11-06 | 2013-01-30 | 河南恒天电子信息技术有限公司 | Internet of things-based multimode intelligent electricity-saving application system for motor |
| CN106208886A (en) * | 2016-07-26 | 2016-12-07 | 广东好太太科技集团股份有限公司 | A kind of motor noise-reducing control circuit applied on intelligence clothes airing machine and method thereof |
| CN116599001A (en) * | 2023-04-23 | 2023-08-15 | 珠海芯烨电子科技有限公司 | Protection method and system for stepping motor of printing terminal |
-
2008
- 2008-09-27 CN CNU2008202123735U patent/CN201282444Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102902259A (en) * | 2012-11-06 | 2013-01-30 | 河南恒天电子信息技术有限公司 | Internet of things-based multimode intelligent electricity-saving application system for motor |
| CN106208886A (en) * | 2016-07-26 | 2016-12-07 | 广东好太太科技集团股份有限公司 | A kind of motor noise-reducing control circuit applied on intelligence clothes airing machine and method thereof |
| CN116599001A (en) * | 2023-04-23 | 2023-08-15 | 珠海芯烨电子科技有限公司 | Protection method and system for stepping motor of printing terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103187789B (en) | Quick uninterruptible power system and control method thereof | |
| CN102709998B (en) | Multifunctional charger | |
| CN203119606U (en) | Intelligent dual-power supply automatic change-over switch controller | |
| CN201282444Y (en) | 380V three-phase motor phase control electricity-saving device | |
| CN106300398B (en) | Interphase load transfer terminal device based on steady-state waveform fitting | |
| CN106849340A (en) | A kind of intelligent UPS device | |
| CN203589836U (en) | Intelligent control apparatus of starting signal for diesel generating set | |
| CN104539197A (en) | Soft start and voltage reduction power saving comprehensive control device and method for asynchronous motor | |
| CN201904605U (en) | Self-adaptive control and protecting system of asynchronous motor | |
| CN102035459A (en) | Intelligent motor controller | |
| CN202043063U (en) | Intelligent start control device | |
| CN202931210U (en) | Power supply unit for testing of electric locomotive | |
| CN202712939U (en) | Multifunctional charger | |
| CN204928360U (en) | A prevent shaking electric installation for series capacitance formula ac contactor | |
| CN209375506U (en) | A kind of generator soft starting device avoiding secondary pulse electric current | |
| CN100384082C (en) | Method and apparatus for controlling AC induction motor energy-saving operation | |
| CN103915846B (en) | A kind of for the energy-conservation of base station and Intelligent power distribution device | |
| CN208112242U (en) | A kind of autocompensation installation based on PLC control | |
| CN100369376C (en) | Three-phase asynchronous motor actiyator and its speed regulation method, air conditioner using the same | |
| CN105375825A (en) | Control apparatus for motor safe startup | |
| CN201247945Y (en) | Over-voltage protection device | |
| Lu et al. | Research and design of a multifunctional soft starter | |
| CN108418227A (en) | A kind of autocompensation installation and its compensation method based on PLC controls | |
| CN2424575Y (en) | Intelligent energy saving drive appts. of oil field beam-pumping unit | |
| CN201937922U (en) | Power-saving device |
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: 20090729 Termination date: 20120927 |