CN201188599Y - Power-saving controller for electric motor - Google Patents
Power-saving controller for electric motor Download PDFInfo
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- CN201188599Y CN201188599Y CNU2008200704917U CN200820070491U CN201188599Y CN 201188599 Y CN201188599 Y CN 201188599Y CN U2008200704917 U CNU2008200704917 U CN U2008200704917U CN 200820070491 U CN200820070491 U CN 200820070491U CN 201188599 Y CN201188599 Y CN 201188599Y
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Abstract
The invention discloses a motor power saving controller which consists of a computer control panel, a phase-shifting trigger panel and a maincontrolpanel, wherein, the computer control panel comprises a starting command circuit, a synchronous signal circuit, a star delta conversion circuit; the star delta conversion circuit includes a microcontroller, the input terminal of the microcontroller is connected with a photoelectric isolator 1, the photoelectric isolator1 is connected with a comparison circuit and an amplifying circuit, the output terminal of the microcontroller is connected with the phase-Shifting trigger panel through a reversed-phase driver; the phase-shifting trigger panel includes six trigger circuits, every trigger circuit includes a trigger pulse channel, two output terminals of every trigger pulse channel are respectively connected with two bidirectional triode thyristors 1, the output terminal of each bidirectional triode thyristor1 is connected with the computer maincontrolpanel. Due to the adoption of automatic tracing star delta conversion method, soft start is carried out under star connecting method when the motor power saving controller is started, therefore, the utility model has the advantages of lowest starting current, long running under Wye connecting method , and high power saving.
Description
Technical field
The utility model is a kind of Electric Machine Control battery saving arrangement, the motor power saving controller that it adopts conventional motors control method and modernized Computer Control Technology to combine novel.
Background technology
Electric power is dominate in national economy.Over nearly 20 years, large-scale power station is gone into operation in succession, all fails to change the situation of China's power supply and demand anxiety.This has the reason of two aspects: first increase in demand; Second waste is also increasing.Being consumed by motor more than 50% of China's annual energy output, in the energy of electrical consumption, electric energy is converted into mechanical energy less than half, and this leak is not if block, and what be injured is enterprise, and what injure is entire society.
The characteristics of motor operation are: power factor height when load is heavy, load when light, power factor is low, the low more electric power resource waste of power factor is big more, electricity is the secondary energy sources that comprehensive energy generates, very precious, on the consumption ratio, electrical consumption has accounted for more than 50% of energy output, and whether this consumption is reasonable, be worth conscientious analysis and research, motor belongs to inductive load theoretically, and whether rational utilization of electricity is relevant with power factor for it, is benchmark with COS φ=1, COS φ=0.8 o'clock loss increases by 1.56 times, COS φ=0.5, and loss will increase by 4 times.
Summary of the invention
The purpose of this utility model provides a kind of motor power saving controller that adopts conventional motors control mode and modernized Computer Control Technology to combine.
For achieving the above object, the utility model is by the following technical solutions:
The utility model is by the computer control board, and phase shift trigger board and master control borad are formed, and above-mentioned computer control board comprises and sends starting command circuit, synchronous signal circuit and star triangle change-over circuit; Star triangle change-over circuit comprises single-chip microcomputer, and the input of single-chip microcomputer links to each other with photoisolator I, and photoisolator I links to each other with amplifying circuit with comparison circuit, and the output of single-chip microcomputer links to each other with the phase shift trigger board through rp-drive; The phase shift trigger board comprises six road circuits for triggering, and every road circuits for triggering include the trigger impulse passage, and two outputs of trigger impulse passage link to each other with two bidirectional triode thyristor I respectively, and the output of bidirectional triode thyristor I is connected with the computer master control borad.
The above-mentioned starting command circuit that sends is: the input of photoisolator I links to each other with button, and its output links to each other with single-chip microcomputer; Synchronous signal circuit is: the input of single-chip microcomputer links to each other with triode by photoisolator II.
The computer control board comprises and manually forces star triangle change-over circuit, and manually force star triangle change-over circuit to be: the input of comparison circuit is connected with button, and its output links to each other with single-chip microcomputer by photoisolator I.
The computer control board comprises the open phase protection signaling module, and the open phase protection signaling module comprises three line phase-interruption protection circuit, and each line phase-interruption protection circuit is: the input of single-chip microcomputer links to each other with current rectifying and wave filtering circuit by photoisolator II.
The computer control board comprises overvoltage crowbar, and overvoltage crowbar is that the input of single-chip microcomputer links to each other with comparator by photoisolator III.
The computer control board comprises overheating protection circuit, and overheating protection circuit comprises temperature sensor, and temperature sensor is connected with the input of single-chip microcomputer by photoisolator III.
The output of single-chip microcomputer links to each other with loud speaker with charactron respectively.
Master control borad be all-electronin from the motion tracking change-over circuit, all-electronin comprises three bidirectional triode thyristor II and three one-way SCRs from the motion tracking change-over circuit; Three bidirectional triode thyristor II are that triangle connects, and three one-way SCRs are Y-connection.
Master control borad be electric mechanical from the motion tracking change-over circuit, electric mechanical comprises three bidirectional triode thyristor III and two solid-state relays from the motion tracking change-over circuit, two solid-state relays connect two A.C. contactors respectively.
Adopt the utility model of technique scheme, owing to adopt from motion tracking star triangle conversion regime, carry out soft opening during startup under star, so the starting current minimum, load factor can be in long-time running under the star 60% when following, the amount of electricity saving height.Loading to change the triangle operation when high automatically over to, satisfies the demand of load to power.When load changes power-saving running again over to when reducing once more automatically, guaranteed the reasonable use of electric power resource.Facts have proved that amount of electricity saving and load factor are inversely proportional to, the low more amount of electricity saving of load factor is high more.Overcome the big shortcoming of electric motor starting electric current simultaneously, inrush current limitation below 3 times.Synchronous 50 times of zero-crossing pulse each second and alternating current have guaranteed the strict synchronism of motor and alternating current.The input of control board is all adopted photoelectric isolation technology with output, and adopts dual power supply, and antijamming capability is strengthened greatly.Program adopts digital control technology, and running parameter is very convenient, and complete machine adopts the modularization assembling mode, and it is very easy to change certain module, and the silicon controlled configuration has guaranteed the system safety reliability service by 3 times of assemblings.Be provided with protections such as overvoltage, overcurrent, the phase failure, overheated and zero-crossing pulse do not have in the utility model,, guaranteed the system safety reliability service when machine can send alarm signal because of extraneous or inner the appearance when unusual.
Description of drawings
Fig. 1 is the circuit diagram of computer control board in the utility model;
Fig. 2 is the circuit diagram of phase shift trigger board in the utility model;
Fig. 3 is the circuit diagram of master control borad in the utility model;
Fig. 4 is another structural circuit figure of master control borad in the utility model.
Embodiment
The utility model comprises the computer control board, and the computer control board is connected with the phase shift trigger board, and the phase shift trigger board is connected with master control borad.Above-mentioned control board comprises and sends starting command circuit, synchronous signal circuit and star triangle change-over circuit; Above-mentioned star triangle change-over circuit comprises single-chip microcomputer IC6, and the input of single-chip microcomputer IC6 links to each other with photoisolator IIC3, and photoisolator IIC3 links to each other with amplifying circuit with comparison circuit, and the output of single-chip microcomputer IC6 links to each other with trigger board through rp-drive IC9; Above-mentioned trigger board comprises six road circuits for triggering, and every road circuits for triggering include the trigger impulse passage, and two outputs of trigger impulse passage link to each other with two bidirectional triode thyristor I respectively, and the output of bidirectional triode thyristor I is connected with master control borad.
As shown in Figure 1, current sensor signal is sent into through the input of DZ1, through rectifying and wave-filtering, at first send into 3 pin of four-way operational amplifier IC1, export through 1 pin, deliver to 12 pin, 5 pin and 9 pin respectively, after 12 pin and 13 pin voltages compare and enlarge, send into 1 pin of photoisolator IIC3, send into the 1 pin P1.0 mouth of single-chip microcomputer IC6 through 16 pin through resistance R 11, other two-way are basic identical, deliver to 3 pin and 5 pin of single-chip microcomputer IC6 respectively.The P1.0 of single-chip microcomputer IC6 and P1.2 form from motion tracking star triangle change-over circuit.Above-mentioned single-chip microcomputer IC6 adopts 89C51 series, simultaneously, and P1.1 interruption-forming current foldback circuit.
The above-mentioned starting command circuit that sends is: the input of photoisolator IIC3 links to each other with button QZ, and its output links to each other with single-chip microcomputer IC6.Signal is sent into 7 pin of photoisolator IIC3 through QZ button and resistance R 4, delivers to the 4 pin P1.3 mouths of single-chip microcomputer IC6 through the output of 10 pin, sends starting command.
Above-mentioned synchronous signal circuit is: the input of single-chip microcomputer IC6 links to each other with triode T1 by photoisolator IIIC4.The A phase voltage signal is sent into the first triode T1 shaping through resistance R 24, and the square wave after the shaping is sent into 7 pin of photoisolator IIIC4, exports the 12 pin P3.2 mouths of sending into single-chip microcomputer IC6 through 10 pin, for the complete machine steady operation provides synchronizing signal.
The utility model can also increase any one or a plurality of circuit module that manually forces in star triangle change-over circuit, open phase protection signaling module, overvoltage crowbar and the overheating protection circuit.
The above-mentioned star triangle change-over circuit that manually forces is: the input of comparison circuit is connected with button ZZ, and its output links to each other with single-chip microcomputer IC6 by photoisolator IIC3.
Above-mentioned open phase protection signaling module comprises three line phase-interruption protection circuit, and each line phase-interruption protection circuit is: the input of single-chip microcomputer IC6 links to each other with current rectifying and wave filtering circuit by photoisolator IIIC4.The current signal that removes three-phase alternating current A, B, C is respectively through DZ2～DZ4, behind the rectifying and wave-filtering, sends into 1 pin of photoisolator IIIC4 through resistance R 14, sent the 5 pin P1.4 mouths of single-chip microcomputer IC6 by the 16 pin output of photoisolator IIIC4.Back two-way is basic identical therewith, that is: DZ3 process resistance R 15 is sent into 3 pin of photoisolator IIIC4, is sent the 6 pin P1.5 mouths of single-chip microcomputer IC6 by the 14 pin output of photoisolator IIIC4; DZ4 process resistance R 16 is sent into 5 pin of photoisolator IIIC4, exports the 7 pin P1.6 mouths that send single-chip microcomputer IC6 by 12 pin of photoisolator IIIC4, as the open phase protection signal.
Above-mentioned overvoltage crowbar is that the input of single-chip microcomputer IC6 links to each other with comparator IC2 by photoisolator IIIIC5.Voltage signal after the rectification is sent into 3 pin of comparator IC2 through R17,, send into 1 pin of photoisolator IIIIC5, send into the P1.7 mouth of single-chip microcomputer IC6, finish overvoltage protection by the output of 16 pin through resistance R 20 through the output of 5 pin.
Above-mentioned overheating protection circuit comprises temperature sensor, and temperature sensor is connected with the input of single-chip microcomputer IC6 by photoisolator IIIIC5.The 5V signal is sent into 3 pin of photoisolator IIIIC5 through temperature sensor R23, outputs to the P3.0 mouth of single-chip microcomputer IC6 by 14 pin, finishes overtemperature protection.
The output of above-mentioned single-chip microcomputer IC6 links to each other with charactron respectively.P0.0～P0.6 is the digital mouth that shows, signal is generated automatically by the operation conditions of program according to motor, can show 10 numerals such as 0～9 grade, and 10 numerals will be represented the running status and the nature of trouble of motor respectively.IC7 is 7407 drivers, and the signal of P0.0～P0.6 is sent into driver IC 7 after seven pull-up resistor R33～R27 lift, and driver IC 7 outputs are delivered to the A～F end of display through six resistance R 34～R39.
The P3.7 mouth of single-chip microcomputer IC6, resistance R 40 and the second triode T2 have formed warning circuit, and the second triode T2 links to each other with loud speaker.
The P2.0 of single-chip microcomputer IC6～P2.3 mouth is the star trigger circuit, and P2.3 provides 5V voltage for trigger board.P2.5～P2.7 is the triangle triggering signal, and P2.4 provides 5V voltage for trigger board.IC9 is 7406 rp-drives, and the three-phase trigger pulse that is generated by Automatic Program is delivered to terminal A by 5 pin that P2.0 directly delivers to IC9 by 6 pin.
As shown in Figure 2, the phase shift trigger board comprises six road circuits for triggering, and every road circuits for triggering include the trigger impulse passage, and two outputs of trigger impulse passage link to each other with two bidirectional triode thyristor I respectively, and the output of bidirectional triode thyristor I is connected with master control borad.Trigger module ZF1～ZF3 is the passage of trigger impulse, simultaneously forceful electric power and light current strictness are isolated, P2.0 goes into 4 ends of ZF1 by computer control board YA termination, after described computer control board YA end is meant and exports rp-drive IC9 to by single-chip microcomputer IC6, star output terminals A, i.e. YA end.P2.3 inserts the 5V power supply, and this moment, 1,2 ends of ZF1 were added on The Trigger of Bidirectional Triode Thyristor end AG1 and AG2 according to pulse change with trigger impulse, and moment has only two controllable silicon conductings, and A voltage is delivered to A '.For preventing to disturb, master control borad is provided with two groups of 5V power supplys, and VCC is for single-chip microcomputer IC6 electricity consumption, and VDD is for the peripheral circuit electricity consumption.P2.1 is gone into 4 ends of ZF2 by computer control board YB termination, P2.2 is gone into 4 ends of ZF3 by computer control board YC termination, finally respectively star A phase, B phase, C phase voltage are delivered to respectively on A ', B ', the C ', A ', B ', C ' voltage are received respectively on three terminals of motor.
P2.5 goes into 4 ends of ZF1 by computer control board Δ A termination, after described computer control board Δ A end is meant and exports rp-drive IC9 to by single-chip microcomputer IC6, and triangle output terminals A, i.e. Δ A end.P2.4 inserts the 5V power supply, and this moment, 1,2 ends of ZF1 were added on The Trigger of Bidirectional Triode Thyristor end AG1 and AG2 according to pulse change with trigger impulse, and moment has only two controllable silicon conductings, and A voltage is delivered to A '.P2.6 is gone into 4 ends of ZF2 by computer control board Δ B termination, P2.7 is gone into 4 ends of ZF3 by computer control board Δ C termination, finally respectively triangle A phase, B phase, C phase voltage are delivered to respectively on A ', B ', the C ', A ', B ', C ' voltage are received respectively on three terminals of motor.
As shown in Figure 3, motor can be formed star operation and triangle operation according to connecting difference, because the star running current has only 1/3 of triangle running current, therefore changes star work over to when motor load is low, and good electricity-saving effect is arranged.Three kinds of conversion methods are arranged, are described below respectively:
1, all-electronin is changed from motion tracking
All-electronin comprises three bidirectional triode thyristor IIQ4, Q5, Q6 and three one-way SCR Q1, Q2, Q3 from the motion tracking change-over circuit; Three bidirectional triode thyristor IIQ4, Q5, Q6 are that triangle connects, and three one-way SCR Q1, Q2, Q3 are Y-connection.
Terminal A, B, C and A ', B ', C ', be six terminals of motor, three bidirectional triode thyristor Q4, Q5, Q6 have been connected into the triangle working method to motor during work automatically, Q1, Q2, Q3 are in cut-off state at this moment, and trigger impulse connects sees the trigger board circuit.
When load is low, bidirectional triode thyristor is ended, stop 1 second after, Q1, Q2, Q3 conducting one by one finish secondary star triangle conversion, this kind conversion is finished under program control automatically.
2, electric mechanical is changed from motion tracking
Electric mechanical comprises three bidirectional triode thyristor IIIQ7, Q8, Q9 and two solid-state relay SSR from the motion tracking change-over circuit, two solid-state relay SSR connect two A.C. contactor CJ1 respectively, CJ2, A.C. contactor CJ1, CJ2 is connected with at least two A.C. contactors.
W, Y, Z and W ', Y ', Z ' are six binding posts of motor, and three bidirectional triode thyristor Q7, Q8, Q9 move under triangle or star state and work online.The conversion of star triangle ends by two A.C. contactors and work is finished.
When ZA ' high potential, D1 is reversed 0 through not gate, SSR1 work, and the CJ1 adhesive, this moment, CJ1-2～when CJ1-4 worked, circuit was connected into the star working method, and CJ1-1, CJ2-1 form interlocking, prevent misoperation.
When load increased, ZA ' step-down uprised after not gate D1 is reverse, and SSR1 quits work, and CJ1 discharges.Stopped 1 second, ZB ' uprises, SSR2 work, CJ2-2, CJ2-4 closure, motor is worked under triangle, because controllable silicon fast conducting and ending under Millisecond guarantees to have only two to be conducted at every turn, this control mode could guarantee reliability service under star for a long time, guarantees that amount of electricity saving has overcome Harmonic Interference in the time of big.
3, automatic adjustment type
The motor load rate can adopt this working method 60% when following, motor can be connected into star work, and the resistance point with A.C. contactor removes simultaneously, is connected the silicon controlled lower end, this kind control mode amount of electricity saving is the highest, can finish automatic adjustment under program control and meet variation.
Operation principle of the present utility model is:
The height of the power factor that motor is in operation is relevant with load factor, loads when light, and power factor is low, and power factor raise naturally when load increased the weight of.According to the operation characteristic of motor, adopt the monolithic computer control technology, comprehensive management is carried out in operation to motor, has developed the intelligent energy-saving controller.During electric motor starting, adopt the star reduced-voltage starting, inrush current limitation at 1～2 times, be in operation if load factor reduces, change the star power-saving running automatically over to, load raises and changes the triangle operation automatically over to, satisfy the demand of load to power, all the time power factor is kept higher level, guaranteed rational utilization of electricity, realized motor operation no-harmonic wave pollution.
Claims (9)
1, motor power saving controller, by the computer control board, phase shift trigger board and master control borad are formed, and it is characterized in that: described computer control board comprises and sends starting command circuit, synchronous signal circuit and star triangle change-over circuit; Described star triangle change-over circuit comprises single-chip microcomputer (IC6), the input of single-chip microcomputer (IC6) links to each other with photoisolator I (IC3), photoisolator I (IC3) links to each other with amplifying circuit with comparison circuit, and the output of single-chip microcomputer (IC6) links to each other with the phase shift trigger board through rp-drive (IC9); Described phase shift trigger board comprises six road circuits for triggering, and every road circuits for triggering include the trigger impulse passage, and two outputs of trigger impulse passage link to each other with two bidirectional triode thyristor I respectively, and the output of bidirectional triode thyristor I is connected with the computer master control borad.
2, motor power saving controller according to claim 1 is characterized in that: the described starting command circuit that sends is: the input of photoisolator I (IC3) links to each other with button (QZ), and its output links to each other with single-chip microcomputer (IC6); Described synchronous signal circuit is: the input of single-chip microcomputer (IC6) links to each other with triode (T1) by photoisolator II (IC4).
3, motor power saving controller according to claim 1, it is characterized in that: the computer control board comprises and manually forces star triangle change-over circuit, the described star triangle change-over circuit that manually forces is: the input of comparison circuit is connected with button (ZZ), and its output links to each other with single-chip microcomputer (IC6) by photoisolator I (IC3).
4, motor power saving controller according to claim 1; it is characterized in that: the computer control board comprises the open phase protection signaling module; described open phase protection signaling module comprises three line phase-interruption protection circuit, and each line phase-interruption protection circuit is: the input of single-chip microcomputer (IC6) links to each other with current rectifying and wave filtering circuit by photoisolator II (IC4).
5, motor power saving controller according to claim 1, it is characterized in that: the computer control board comprises overvoltage crowbar, described overvoltage crowbar is that the input of single-chip microcomputer (IC6) links to each other with comparator (IC2) by photoisolator III (IC5).
6, motor power saving controller according to claim 1; it is characterized in that: the computer control board comprises overheating protection circuit; described overheating protection circuit comprises temperature sensor, and temperature sensor is connected with the input of single-chip microcomputer (IC6) by photoisolator III (IC5).
7, according to the arbitrary described motor power saving controller of claim 1～6, it is characterized in that: the output of described single-chip microcomputer (IC6) links to each other with loud speaker with charactron respectively.
8, motor power saving controller according to claim 1 is characterized in that: described master control borad be all-electronin from the motion tracking change-over circuit, all-electronin comprises three bidirectional triode thyristor II and three one-way SCRs from the motion tracking change-over circuit; Three bidirectional triode thyristor II are that triangle connects, and three one-way SCRs are Y-connection.
9, motor power saving controller according to claim 1, it is characterized in that: described master control borad is that electric mechanical is from the motion tracking change-over circuit, electric mechanical comprises three bidirectional triode thyristor III and two solid-state relays from the motion tracking change-over circuit, two solid-state relays connect respectively two A.C. contactors (CJ1, CJ2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200704917U CN201188599Y (en) | 2008-05-13 | 2008-05-13 | Power-saving controller for electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200704917U CN201188599Y (en) | 2008-05-13 | 2008-05-13 | Power-saving controller for electric motor |
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| Publication Number | Publication Date |
|---|---|
| CN201188599Y true CN201188599Y (en) | 2009-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200704917U Expired - Fee Related CN201188599Y (en) | 2008-05-13 | 2008-05-13 | Power-saving controller for electric motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8207699B2 (en) | 2009-07-08 | 2012-06-26 | Innosave Ltd. | Method and apparatus for AC motor control |
| CN103378769A (en) * | 2012-04-18 | 2013-10-30 | 王运 | Power saving controller for motor |
| CN108540036A (en) * | 2017-03-02 | 2018-09-14 | 中山市东裕景顺节能设备有限公司 | No humorous sinewave power corrects electricity-saving control device |
-
2008
- 2008-05-13 CN CNU2008200704917U patent/CN201188599Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8207699B2 (en) | 2009-07-08 | 2012-06-26 | Innosave Ltd. | Method and apparatus for AC motor control |
| CN103378769A (en) * | 2012-04-18 | 2013-10-30 | 王运 | Power saving controller for motor |
| CN103378769B (en) * | 2012-04-18 | 2017-04-12 | 王运 | Power saving controller for motor |
| CN108540036A (en) * | 2017-03-02 | 2018-09-14 | 中山市东裕景顺节能设备有限公司 | No humorous sinewave power corrects electricity-saving control device |
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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: 20090128 Termination date: 20110513 |