CN202712821U - Integrated protector for motor - Google Patents
Integrated protector for motor Download PDFInfo
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- CN202712821U CN202712821U CN 201220146302 CN201220146302U CN202712821U CN 202712821 U CN202712821 U CN 202712821U CN 201220146302 CN201220146302 CN 201220146302 CN 201220146302 U CN201220146302 U CN 201220146302U CN 202712821 U CN202712821 U CN 202712821U
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Abstract
The utility model relates to an integrated protector for a motor, wherein a phase failure over-current signal detection circuit detects a whole circuit and detects the phase failure signal or the overload and over-current signals of the motor, the phase failure over-current signal detection circuit delays the phase failure signal and transmits the phase failure signal to an integrated signal processing circuit for amplification processing, the processed signal is input into a control execution circuit to drive the control execution circuit, and then input into an AC contactor CJ loop to perform phase failure protection on the motor, the phase failure over-current signal detection circuit is connected with an over-current signal time-delay circuit and transmits the over-current signal to the over-current signal time-delay circuit for delaying, if the over-current signal exceeds a preset time the over-current signal is input into the integrated signal processing circuit for amplification processing, the over-current signal drives the control execution loop of the control execution circuit, and then the cover-current signal is input into the AC contactor CJ loop to perform overload and over-current protection on the motor. The integrated protector for a motor performs phase failure protection in an under-current input mode, and performs overload and over-current protection in an over-current input mode.
Description
Technical field
The utility model relates to a kind of Electric Motor Open-phase Situation, overload, overcurrent circuit protection device, relates in particular to a kind of integrated protector for electric motor.
Background technology
In the development and construction of society, motor is the indispensable equipment of all trades and professions, and threephase asynchronous is surprising because of the quantity that disconnected phase, overload or stall burn out motor at work.
Summary of the invention
For avoiding the accident that burns out of motor, the utility model provides a kind of all electronic circuit protective device, and motor is implemented protection.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of integrated protector for electric motor is characterized in that, comprising: disconnected phase over-current signal testing circuit, and disconnected phase over-current signal testing circuit detects whole circuit, the disconnected phase signals of detection motor or overload, over-current signal; Disconnected phase over-current signal testing circuit is connected with disconnected phase signals delay circuit, after disconnected phase signals carried out time-delay, enter the Comprehensive Signal Processing circuit and amplify processing, signal after the processing enters the control executive circuit and promotes the control executive circuit, then to the open phase protection that exchanges contactor CJ loop enforcement motor; Disconnected phase over-current signal testing circuit is connected with the over-current signal delay circuit; over-current signal is sent into the over-current signal delay circuit carry out the time-delay state; over-current signal surpasses setting-up time; this signal enters the Comprehensive Signal Processing circuit and amplifies processing; promote the control of control executive circuit and carry out the loop, then to exchanging contactor CJ loop to electromotor overload, overcurrent protection.
According to described integrated protector for electric motor, it is characterized in that: described current transformer L1, L2, L3, diode D7, D8, D9, capacitor C 4, C5, C6, resistance R 7, R8, R9, LED 1, LED2, LED3 form disconnected phase over-current signal testing circuit; Diode D10, D11, D12, capacitor C 7, potentiometer RP2 forms the over-current signal testing circuit; Triode BG4, BG5, resistance R 5, LED 4, diode D5, potentiometer RP1 resistance R 3, voltage stabilizing didoe W2, capacitor C 2 forms delay circuit; Resistance R 6, capacitor C 3 forms disconnected phase delay circuit; Voltage stabilizing didoe W1, diode D6, triode BG6 resistance R 4, R1, R2, controllable silicon KZ1 composition control executive circuit.
According to described integrated protector for electric motor, it is characterized in that: when motor runs well, current transformer L1, L2, L3 secondary coil all have signal voltage output, triode BG1, BG2, BG3 are in conducting state, triode BG6 is in by state, controllable silicon KZ1 is in conducting state, and A.C. contactor CJ electric current consists of the loop through rectification circuit D1-D4, controllable silicon KZ1, voltage stabilizing didoe W3, and the operating voltage of 12V is provided to circuit by the A point simultaneously; When disconnected phase time appears in three phase mains any mutually, induced signal loss of voltage among the corresponding instrument transformer L, the transistor base that this phase L coil connects is lost the job voltage and is become cut-off, positive supply charges to electrochemical capacitor C3 by resistance R 6, after time-delay after a while, voltage stabilizing didoe W1 reverse-conducting when the B point voltage rises to the reverse breakdown voltage that is higher than voltage stabilizing didoe W1 gradually; Triode BG6 base stage obtains voltage turn-on, and the control voltage of the controllable silicon KZ1 utmost point out of hand is closed the voltage circuit of A.C. contactor CJ, the A.C. contactor tripping operation, and motor is protected.
According to described integrated protector for electric motor, it is characterized in that: when overload, stall, current imbalance, phase fault, turn-to-turn short circuit appear in motor M, current transformer L1, L2, L3 secondary induction voltage raise, through diode D10, D11, D12 rectification, capacitor C 7 filtering, by the base stage of sending into triode BG4 after the potentiometer RP2 sampling, triode BG4 must conduct, and triode BG5 loses base voltage and becomes cut-off; Forward voltage charges to capacitor C 2 through potentiometer PR1, charging interval is regulated by potentiometer PR1, and voltage raises in time, when being higher than the reverse breakdown voltage of voltage stabilizing didoe W2, voltage stabilizing didoe W2 reverse-conducting, the base stage of triode BG6 obtain immediately conducting of voltage; Controllable silicon KZ1 control utmost point dead electricity disconnects the work loop of A.C. contactor CJ and trips, and motor obtains overcurrent protection.
The utility model has designed an all electronic circuit protective device for fear of the accident that burns out of motor, and motor is implemented protection, and this device uses very convenient, and its work does not need external power supply, and its string is got final product in ac contactor circuit.The characteristics of this device: disconnected phase time adopts the input mode (referring to that certain phase current goes to zero) of undercurrent; take this principle as the basis; implement open phase protection, it is basis (refer to motor when normal operation, electric current surpasses enforcement protection more than 40%) that overload, stall adopt the input mode of overcurrent.
Description of drawings
Fig. 1 is circuit block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
The utility model integrated protector for electric motor comprises as shown in Figure 1 and Figure 2: disconnected phase over-current signal testing circuit, and disconnected phase over-current signal testing circuit detects whole circuit, the disconnected phase signals of detection motor or overload, over-current signal; Disconnected phase over-current signal testing circuit is connected with disconnected phase signals delay circuit, disconnected phase signals has been carried out time-delay 3-6 after second, enter the Comprehensive Signal Processing circuit and amplify processing, signal after the processing enters the control executive circuit and promotes the control executive circuit, then to the open phase protection that exchanges contactor CJ loop enforcement motor; Disconnected phase over-current signal testing circuit is connected with the over-current signal delay circuit; over-current signal is sent into the over-current signal delay circuit carry out the time-delay state; over-current signal surpasses setting-up time; this signal enters the Comprehensive Signal Processing circuit and amplifies processing; promote the control of control executive circuit and carry out the loop, then finish electromotor overload, overcurrent protection to exchanging contactor CJ loop.
One, the operation principle of the utility model integrated protector for electric motor
In the development and construction of society; motor is the indispensable equipment of all trades and professions; and threephase asynchronous is surprising because of the quantity that disconnected phase, overload or stall burn out motor at work; for avoiding the accident that burns out of motor; the utility model has designed an all electronic circuit protective device, and motor is implemented protection, and this device uses very convenient; its work does not need external power supply, and its string is got final product in ac contactor circuit.The characteristics of this device: disconnected phase time adopts the input mode (referring to that certain phase current goes to zero) of undercurrent; take this principle as the basis; implement open phase protection, it is basis (refer to motor when normal operation, electric current surpasses enforcement protection more than 40%) that overload, stall adopt the input mode of overcurrent.
Two, the disconnected phase of threephase asynchronous, the current foldback circuit course of work
The utility model mainly is comprised of six parts:
1, current transformer L1, L2, L3, diode D7, D8, D9, capacitor C 4, C5, C6, resistance R 7, R8, R9, LED 1, LED2, LED3 form disconnected phase over-current signal testing circuit.
2, diode D10, D11, D12, capacitor C 7, potentiometer RP2 forms the over-current signal testing circuit.
3, triode BG4, BG5, resistance R 5, LED 4, diode D5, potentiometer RP1 resistance R 3, voltage stabilizing didoe W2, capacitor C 2 forms the over-current signal delay circuit.
4, resistance R 6, and capacitor C 3 forms disconnected phase signals delay circuit.
5, voltage stabilizing didoe W1, diode D6, triode BG6 resistance R 4, R1, R2, controllable silicon KZ1 composition control executive circuit.
6, voltage stabilizing didoe W3, capacitor C 1, diode D1, D2, D3, D4, composition full-wave rectification voltage stabilizing circuit.
Three, circuit working principle
As shown in Figure 1, when motor normally moved, disconnected phase over-current signal testing circuit detected whole circuit, when fault is arranged, and the corresponding disconnected phase signals that will detect motor or overload, over-current signal.
When disconnected phase signals appears in the Motor Control loop; disconnected phase signals delay circuit enters work; for strengthening antijamming capability; disconnected phase signals has been carried out time-delay 3-6 after second; enter the Comprehensive Signal Processing circuit and amplify processing; signal after the processing enters the control executive circuit and promotes the control executive circuit, then to the open phase protection that exchanges contactor CJ loop enforcement motor.
When the overcurrent signal deteching circuit detects 1.4 times of motor when operation electric current overrate; over-current signal is sent into the over-current signal delay circuit carry out the time-delay state; over-current signal surpasses setting-up time, and (setting-up time is within 25 seconds～5 minutes; time can manually arrange as required; there are RP1 and C2 to determine); this signal enters the Comprehensive Signal Processing circuit and amplifies processing; go to promote the control of control executive circuit and carry out the loop, then finish electromotor overload, overcurrent protection to exchanging contactor CJ loop.
When motor runs well, current transformer L1, L2, the L3 secondary coil all has signal voltage output, triode BG1, BG2, BG3 is in conducting state, this moment, triode BG1 collector electrode B point voltage approximated triode BG1, BG2, about the forward voltage drop 2V that BG3 three connects by all means, this voltage is lower than the reverse breakdown voltage of voltage stabilizing didoe W1, voltage stabilizing didoe W1 is not breakdown, triode BG6 base stage can not get voltage, be in by state, controllable silicon KZ1 is in conducting state, A.C. contactor CJ electric current is through rectification circuit D1-D4, controllable silicon KZ1, voltage stabilizing didoe W3 consists of the loop, and the operating voltage of 12V is provided to circuit by the A point simultaneously.
Four, disconnected phase time appears mutually when three phase mains any, induced signal loss of voltage among the corresponding instrument transformer L, corresponding LED light is extinguished, lose the job voltage and become cut-off with the transistor base that this phase L coil connects, because triode BG1, BG2, BG3 are tandem workings, wherein any triode cut-off B electronegative potential condition of ordering is namely destroyed, positive supply charges to electrochemical capacitor C3 by resistance R 6, after time-delay after a while, voltage stabilizing didoe W1 reverse-conducting when the B point voltage rises to the reverse breakdown voltage that is higher than voltage stabilizing didoe W1 gradually.Triode BG6 base stage obtains voltage turn-on, because the conducting of triode BG6, the control voltage of the controllable silicon KZ1 utmost point out of hand is closed the voltage circuit of A.C. contactor CJ, and the A.C. contactor tripping operation is protected motor.
Five, the detection of over-current signal
When overload, stall, current imbalance, phase fault, turn-to-turn short circuit appear in the motor M of operation, current transformer L1, L2, L3 secondary induction voltage raise, through diode D10, D11, D12 rectification, capacitor C 7 filtering, by the base stage of sending into triode BG4 after the potentiometer RP2 sampling, triode BG4 must conduct, and overload light LED4 is bright, because the conducting of triode BG4, triode BG5 loses base voltage and becomes cut-off.Therefore, forward voltage charges to capacitor C 2 through potentiometer PR1, charging interval is regulated (within 25 seconds～5 minutes) by potentiometer PR1, voltage raises in time, when being higher than the reverse breakdown voltage of voltage stabilizing didoe W2, voltage stabilizing didoe W2 reverse-conducting, the base stage of triode BG6 obtain immediately conducting of voltage.Because the conducting of triode BG6, controllable silicon KZ1 control utmost point dead electricity disconnects the work loop of A.C. contactor CJ and trips, and motor obtains overcurrent protection.
Embodiment recited above is described preferred implementation of the present utility model; be not that design of the present utility model and protection range are limited; under the prerequisite that does not break away from the utility model design concept; common engineers and technicians make the technical solution of the utility model in this area various modification and improvement all should fall into protection range of the present utility model.
Claims (4)
1. an integrated protector for electric motor is characterized in that, comprising: disconnected phase over-current signal testing circuit, and disconnected phase over-current signal testing circuit detects whole circuit, the disconnected phase signals of detection motor or overload, over-current signal; Disconnected phase over-current signal testing circuit is connected with disconnected phase signals delay circuit, after disconnected phase signals carried out time-delay, enter the Comprehensive Signal Processing circuit and amplify processing, signal after the processing enters the control executive circuit and promotes the control executive circuit, then to the open phase protection that exchanges contactor CJ loop enforcement motor; Disconnected phase over-current signal testing circuit is connected with the over-current signal delay circuit; over-current signal is sent into the over-current signal delay circuit carry out the time-delay state; over-current signal surpasses setting-up time; this signal enters the Comprehensive Signal Processing circuit and amplifies processing; promote the control of control executive circuit and carry out the loop, then to exchanging contactor CJ loop to electromotor overload, overcurrent protection.
2. integrated protector for electric motor according to claim 1, it is characterized in that: current transformer L1, L2, L3, diode D7, D8, D9, capacitor C 4, C5, C6, resistance R 7, R8, R9, LED 1, LED2, LED3 form disconnected phase over-current signal testing circuit; Diode D10, D11, D12, capacitor C 7, potentiometer RP2 forms the over-current signal testing circuit; Triode BG4, BG5, resistance R 5, LED 4, diode D5, potentiometer RP1 resistance R 3, voltage stabilizing didoe W2, capacitor C 2 forms delay circuit; Resistance R 6, capacitor C 3 forms disconnected phase delay circuit; Voltage stabilizing didoe W1, diode D6, triode BG6 resistance R 4, R1, R2, controllable silicon KZ1 composition control executive circuit.
3. integrated protector for electric motor according to claim 2, it is characterized in that: when motor runs well, current transformer L1, L2, L3 secondary coil all have signal voltage output, triode BG1, BG2, BG3 are in conducting state, triode BG6 is in by state, controllable silicon KZ1 is in conducting state, and A.C. contactor CJ electric current consists of the loop through rectification circuit D1-D4, controllable silicon KZ1, voltage stabilizing didoe W3, and the operating voltage of 12V is provided to circuit by the A point simultaneously; When disconnected phase time appears in three phase mains any mutually, induced signal loss of voltage among the corresponding instrument transformer L, the transistor base that this phase L coil connects is lost the job voltage and is become cut-off, positive supply charges to electrochemical capacitor C3 by resistance R 6, after time-delay after a while, voltage stabilizing didoe W1 reverse-conducting when the B point voltage rises to the reverse breakdown voltage that is higher than voltage stabilizing didoe W1 gradually; Triode BG6 base stage obtains voltage turn-on, and the control voltage of the controllable silicon KZ1 utmost point out of hand is closed the voltage circuit of A.C. contactor CJ, the A.C. contactor tripping operation, and motor is protected.
4. integrated protector for electric motor according to claim 2, it is characterized in that: when overload, stall, current imbalance, phase fault, turn-to-turn short circuit appear in motor M, current transformer L1, L2, L3 secondary induction voltage raise, through diode D10, D11, D12 rectification, capacitor C 7 filtering, by the base stage of sending into triode BG4 after the potentiometer RP2 sampling, triode BG4 must conduct, and triode BG5 loses base voltage and becomes cut-off; Forward voltage charges to capacitor C 2 through potentiometer PR1, charging interval is regulated by potentiometer PR1, and voltage raises in time, when being higher than the reverse breakdown voltage of voltage stabilizing didoe W2, voltage stabilizing didoe W2 reverse-conducting, the base stage of triode BG6 obtain immediately conducting of voltage; Controllable silicon KZ1 control utmost point dead electricity disconnects the work loop of A.C. contactor CJ and trips, and motor obtains overcurrent protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220146302 CN202712821U (en) | 2012-04-10 | 2012-04-10 | Integrated protector for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220146302 CN202712821U (en) | 2012-04-10 | 2012-04-10 | Integrated protector for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202712821U true CN202712821U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220146302 Expired - Fee Related CN202712821U (en) | 2012-04-10 | 2012-04-10 | Integrated protector for motor |
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| Country | Link |
|---|---|
| CN (1) | CN202712821U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593793A (en) * | 2012-04-10 | 2012-07-18 | 滕州亿达华闻煤电化有限公司 | Motor integrated protector |
| CN104577987A (en) * | 2015-01-01 | 2015-04-29 | 廖煌 | Self-protection motor |
-
2012
- 2012-04-10 CN CN 201220146302 patent/CN202712821U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593793A (en) * | 2012-04-10 | 2012-07-18 | 滕州亿达华闻煤电化有限公司 | Motor integrated protector |
| CN104577987A (en) * | 2015-01-01 | 2015-04-29 | 廖煌 | Self-protection motor |
| CN104577987B (en) * | 2015-01-01 | 2018-02-02 | 廖煌 | Self-protective 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: 20130130 Termination date: 20140410 |