CN103606892A - Motor control circuit - Google Patents
Motor control circuit Download PDFInfo
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- CN103606892A CN103606892A CN201310589458.0A CN201310589458A CN103606892A CN 103606892 A CN103606892 A CN 103606892A CN 201310589458 A CN201310589458 A CN 201310589458A CN 103606892 A CN103606892 A CN 103606892A
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Abstract
The invention relates to a motor control circuit. The motor control circuit comprises a motor, a controller, a relay and a current transformer, wherein the controller comprises an AD converting circuit; the main contact of the relay and the primary winding of the current transformer are connected in series with the main circuit of a motor; the secondary winding of the current transformer is connected with the input pin of the AD converting circuit; and the relay control signal output end of the controller is connected with the control signal input end of the relay. The motor control circuit employs the current transformer to detect motor current so as to determine the working state of the motor so that the real working state of the motor can be reflected, and in case of motor overload, power can be cut off timely, and the motor is stopped from working or is inversed, thus the working state of the motor can be effectively protected in real time.
Description
Technical field
The present invention relates to a kind of control circuit, relate in particular to a kind of circuit for controlling motor.
Background technology
Motor is a very important driver part, if motor has damaged, much electrical equipment just can not be worked, and most motors are protected by a temperature sensor, deenergization when motor temperature is too high, but now motor likely damages.
There is part producer to adopt the method for measuring machine motor speed indirectly to measure electric machine operation state, this method need to be installed the device that tests the speed on motor driving wheel, on driving wheel opposite, another sensing device is installed again, sensing device is linked on control board with wire, and this method of testing device is many, and wire is many, complex structure, and accuracy is low, error is large, unreliable.
Ye You producer takes the operating current of the mode test volume motor of common coiling transformer, the linear weak effect of test of the mode of coiling transformer, and the scope of testing current does not reach requirement yet.Cannot the real operating state of testing of electric motors.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of circuit for controlling motor.
In order to solve the problems of the technologies described above, the invention provides a kind of circuit for controlling motor, it is characterized in that, comprise motor, controller, the first relay, the second relay summation current transformer, described controller comprises A/D convertor circuit;
The main circuit serial connection of the main contacts of the first described relay, the former limit winding of current transformer and motor; The secondary winding of described current transformer connects the input pin of A/D convertor circuit, the control signal input of first relay control signal output termination the first relay of described controller;
The former limit winding of the main contacts of the second described relay and the main contacts of the first relay, current transformer, the main circuit of motor serial connection; The control signal input of second relay control signal output termination the second relay of described controller; The main contacts of the second relay forms double-point double-throw switch, and under the first state of the second relay double-point double-throw switch, the first binding post of motor connects power firestreak, and the second binding post connects zero-power line; Under the second state of the second relay double-point double-throw switch, the first binding post of motor connects zero-power line, and the second binding post connects power firestreak.
Further, circuit for controlling motor comprises the first triode, the first protection diode, the first electric capacity, and electric power supply positive source is succeeded in one end of the first relay winding, the collector electrode of another termination the first triode; The grounded emitter of the first triode, base stage is as the first relay control signal output of the control signal input termination controller of the first relay; The negative electrode of the first protection diode is succeeded electric power supply positive source, and anode connects the collector electrode of the first triode, and the first electric capacity and the first relay winding also connect.
Further, circuit for controlling motor comprises the second triode, the second protection diode, the second electric capacity, and electric power supply positive source is succeeded in one end of the second relay winding, the collector electrode of another termination the second triode; The grounded emitter of the second triode, base stage is as the second relay control signal output of the control signal input termination controller of the second relay; The negative electrode of the second protection diode is succeeded electric power supply positive source, and anode connects the collector electrode of the second triode, and the second electric capacity and the second relay winding also connect.
Further, circuit for controlling motor also comprises electric machine operation state display, the electric machine operation state signal output part of the input termination controller of described electric machine operation state display.
The invention has the beneficial effects as follows: circuit for controlling motor of the present invention adopts current transformer to detect the operating state that current of electric judges motor; the working condition of energy actual response motor; during motor overload, deenergization stops machine operation or makes motor reversal in time, and the operating state of motor is carried out to real-time guard effectively.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of circuit for controlling motor embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
In a kind of circuit for controlling motor embodiment of the present invention shown in Fig. 1, circuit for controlling motor comprises motor M 1, CPU (controller), relay J K1, current transformer T1 and electric machine operation state display, and CPU comprises A/D convertor circuit.The former limit winding of the main contacts of relay J K1, the main contacts of relay J K2, current transformer T1 and the main circuit of motor M 1 serial connection.The secondary winding of current transformer T1 connects the input pin of A/D convertor circuit, the control signal input of the relay J K1 control signal output relay termination JK1 of CPU, the control signal input of the relay J K2 control signal output relay termination JK2 of CPU.
The electric machine operation state signal output part of the input termination CPU of electric machine operation state display.
The control circuit of relay J K1 comprises switch triode V1, protection diode V3, capacitor C 1 and resistance R 1.Electric power supply positive source VCC is succeeded in one end of relay J K1 winding, the collector electrode of another termination switch triode V1; The grounded emitter of switch triode V1, base stage connects the relay J K1 control signal output of CPU as the control signal input of relay J K1 by resistance R 1; The negative electrode of protection diode V3 is succeeded electric power supply positive source VCC, and anode connects the collector electrode of switch triode V1, and capacitor C 1 and relay J K1 winding also connect.
The control circuit of relay J K2 comprises switch triode V2, protection diode V4, capacitor C 2 and resistance R 2.Electric power supply positive source VCC is succeeded in one end of relay J K2 winding, the collector electrode of another termination switch triode V2; The grounded emitter of switch triode V2, base stage connects the relay J K2 control signal output of CPU as the control signal input of relay J K2 by resistance R 2; The negative electrode of protection diode V4 is succeeded electric power supply positive source VCC, and anode connects the collector electrode of switch triode V2, and capacitor C 2 and relay J K2 winding also connect.
The main contacts of relay J K2 forms double-point double-throw switch.The live wire L of single phase poaer supply succeeds the input of electrical equipment JK2 the first commutator through the former limit winding of current transformer T1 and the main contacts of relay J K1, the zero line N of single phase poaer supply succeeds the input of electrical equipment JK2 the first commutator.Two outputs of relay J K2 the first commutator and the second commutator connect respectively the binding post 1 and 2 of motor M 1.
Under the first state of relay J K2 double-point double-throw switch, the binding post 1 of motor M 1 connects power firestreak, and binding post 2 connects zero-power line; Under the second state of relay J K2 double-point double-throw switch, the binding post 1 of motor M 1 connects zero-power line, and binding post 2 connects power firestreak.
Under normal circumstances, relay J K1 is closed, motor M1 forward rotation.The operating current of current transformer Real-Time Monitoring M1, CPU carries out A/D conversion by Current Mutual Inductance signal, operating state that can testing of electric motors, CPU multiplies each other the electric current of motor and its rated voltage to obtain the realtime power of motor, and shows by electric machine operation state display.
The running current of motor has a scope, when the electric current of test to motor surpasses established standards and continue after a setting-up time, can judge machine operation abnormal (motor damages or motor overload).Now, CPU is to relay J K1 output control signal, and the main contacts of relay J K1 disconnects, motor power-off stall.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a circuit for controlling motor, is characterized in that, comprises motor, controller, the first relay, the second relay summation current transformer, and described controller comprises A/D convertor circuit;
The main circuit serial connection of the main contacts of the first described relay, the former limit winding of current transformer and motor; The secondary winding of described current transformer connects the input pin of A/D convertor circuit, the control signal input of first relay control signal output termination the first relay of described controller;
The former limit winding of the main contacts of the second described relay and the main contacts of the first relay, current transformer, the main circuit of motor serial connection; The control signal input of second relay control signal output termination the second relay of described controller; The main contacts of the second relay forms double-point double-throw switch, and under the first state of the second relay double-point double-throw switch, the first binding post of motor connects power firestreak, and the second binding post connects zero-power line; Under the second state of the second relay double-point double-throw switch, the first binding post of motor connects zero-power line, and the second binding post connects power firestreak.
2. a kind of circuit for controlling motor according to claim 1, is characterized in that, comprises the first triode, the first protection diode, the first electric capacity, and electric power supply positive source is succeeded in one end of the first relay winding, the collector electrode of another termination the first triode; The grounded emitter of the first triode, base stage is as the first relay control signal output of the control signal input termination controller of the first relay; The negative electrode of the first protection diode is succeeded electric power supply positive source, and anode connects the collector electrode of the first triode, and the first electric capacity and the first relay winding also connect.
3. a kind of circuit for controlling motor according to claim 1 and 2, it is characterized in that, comprise the second triode, the second protection diode, the second electric capacity, electric power supply positive source is succeeded in one end of the second relay winding, the collector electrode of another termination the second triode; The grounded emitter of the second triode, base stage is as the second relay control signal output of the control signal input termination controller of the second relay; The negative electrode of the second protection diode is succeeded electric power supply positive source, and anode connects the collector electrode of the second triode, and the second electric capacity and the second relay winding also connect.
4. a kind of circuit for controlling motor according to claim 3, is characterized in that, comprises electric machine operation state display, the electric machine operation state signal output part of the input termination controller of described electric machine operation state display.
5. a kind of circuit for controlling motor according to claim 1 and 2, is characterized in that, comprises electric machine operation state display, the electric machine operation state signal output part of the input termination controller of described electric machine operation state display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310589458.0A CN103606892A (en) | 2013-11-20 | 2013-11-20 | Motor control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310589458.0A CN103606892A (en) | 2013-11-20 | 2013-11-20 | Motor control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103606892A true CN103606892A (en) | 2014-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310589458.0A Pending CN103606892A (en) | 2013-11-20 | 2013-11-20 | Motor control circuit |
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| Country | Link |
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| CN (1) | CN103606892A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104118692A (en) * | 2014-07-31 | 2014-10-29 | 山东华联矿业股份有限公司 | Belt conveyor on-load drive automatic transfer device |
| CN105716578A (en) * | 2016-04-29 | 2016-06-29 | 周睿萌 | Vibrating rod gradient detection and quality monitoring method and system |
| CN106982010A (en) * | 2017-05-13 | 2017-07-25 | 深圳市复兴伟业技术有限公司 | The nonshared control unit and method of household kitchen wastes processor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2548345Y (en) * | 2002-06-21 | 2003-04-30 | 郑州海韦力食品工业有限公司 | D.C. motor overload protector |
| CN102684159A (en) * | 2012-04-27 | 2012-09-19 | 深圳奥士达电子有限公司 | Control circuit and control method for motor of paper shredder |
-
2013
- 2013-11-20 CN CN201310589458.0A patent/CN103606892A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2548345Y (en) * | 2002-06-21 | 2003-04-30 | 郑州海韦力食品工业有限公司 | D.C. motor overload protector |
| CN102684159A (en) * | 2012-04-27 | 2012-09-19 | 深圳奥士达电子有限公司 | Control circuit and control method for motor of paper shredder |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104118692A (en) * | 2014-07-31 | 2014-10-29 | 山东华联矿业股份有限公司 | Belt conveyor on-load drive automatic transfer device |
| CN105716578A (en) * | 2016-04-29 | 2016-06-29 | 周睿萌 | Vibrating rod gradient detection and quality monitoring method and system |
| CN105716578B (en) * | 2016-04-29 | 2018-07-13 | 周睿萌 | The detection of vibrating spear gradient and quality control method and system |
| CN106982010A (en) * | 2017-05-13 | 2017-07-25 | 深圳市复兴伟业技术有限公司 | The nonshared control unit and method of household kitchen wastes processor |
| CN106982010B (en) * | 2017-05-13 | 2023-10-31 | 深圳市复兴伟业技术有限公司 | Special controller and method for household kitchen waste processor |
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Application publication date: 20140226 |