CN205356198U - Positive -phase -sequence safe start control device of three -phase electric machine - Google Patents
Positive -phase -sequence safe start control device of three -phase electric machine Download PDFInfo
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- CN205356198U CN205356198U CN201620095502.1U CN201620095502U CN205356198U CN 205356198 U CN205356198 U CN 205356198U CN 201620095502 U CN201620095502 U CN 201620095502U CN 205356198 U CN205356198 U CN 205356198U
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Abstract
Positive -phase -sequence safe start control device of three -phase electric machine belongs to motor control field, the utility model discloses an incorrect problem that results in the accident of phase sequence when solving the motor start -up. The utility model discloses a circuit breaker QS1 and ac contactor KM1, three phase machine M loop through three live wires that ac contactor KM1 normally opened main contacts KM1 -1 and circuit breaker QS1 connection three phase current, still include circuit breaker QS, start button SB1, stop button SB2, auxiliary relay K, NAND gate G1~G4, resistance R1~R14, diode VD1~VD5, zener diode vs1~Vs3, NPN triode VT1, neon indicator HL1~HL3, and the circuit of normally opening between main contacts KM1 -1 and the circuit breaker QS1 by ac contactor KM1 provides working power supply.
Description
Technical field
This utility model relates to the monitoring motor device whether positive phase sequence starts, and belongs to Motor Control Field.
Background technology
Three-phase circuit is that frequency is identical, amplitude is identical, phase place differs the simple sinusoidal electromotive of the 120 ° circuit as power supply each other by three.Three-phase circuit because improving power 50% than single phase poaer supply in generating, steel 25% are saved than single-phase transmission of electricity in transmission of electricity, in distribution, three-phase transformer is than single-phase transformer economy and conveniently accessible load, in fortune electricity equipment, there is the advantages such as simple in construction, cost are low, reliable, easy to maintenance and be applied widely in power, be the main power supply mode that adopts of current power system.Phase sequence is had strict requirement by three phase electric machine, if there is misconnection or other unusual conditions, it will cause serious accident.
Summary of the invention
This utility model is in order that solve the phase sequence incorrect problem causing accident during electric motor starting, it is provided that a kind of three phase electric machine positive phase sequence safe starting control device.
Three phase electric machine positive phase sequence safe starting control device described in the utility model, pass sequentially through the normally opened main contacts KM1-1 of A.C. contactor KM1 and three-phase breaker QS1 including three-phase breaker QS1 and A.C. contactor KM1, three phase electric machine M and connect three live wires of three phase mains；And the A corresponding connection live wire L3 of corresponding connection live wire L1, B corresponding connection live wire L2, C of three phase electric machine M；
Also include single-phase circuit breaker QS2, start button SB1, stop button SB2, auxiliary reclay K, NAND gate G1, NAND gate G2, NAND gate G3, NAND gate G4, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, diode VD1, diode VD2, diode VD3, Zener diode Vs1, Zener diode Vs2, Zener diode Vs3, NPN audion VT1, neon indicator HL1, neon indicator HL2, neon indicator HL3 and positive sequence display lamp LED；And provide working power by the circuit between the normally opened main contacts KM1-1 and circuit breaker Q S1 of A.C. contactor KM1；
Live wire L1 is simultaneously connected with one end of resistance R1 and one end of resistance R2, the other end of resistance R1 connects one end of neon indicator HL1, the other end of resistance R2 is simultaneously connected with the other end of neon indicator HL1 and the anode of diode VD1, the negative electrode of diode VD1 connects one end of resistance R3, and the other end of resistance R3 is simultaneously connected with an input of the negative electrode of Zener diode Vs1, one end of resistance R10, the input of NAND gate G2 and NAND gate G1；The anode of Zener diode Vs1 and the other end ground connection of resistance R10；
Live wire L2 is simultaneously connected with one end of resistance R4 and one end of resistance R5, the other end of resistance R4 connects one end of neon indicator HL2, the other end of resistance R5 is simultaneously connected with the other end of neon indicator HL2 and the anode of diode VD2, the negative electrode of diode VD2 connects one end of resistance R6, and the other end of resistance R6 is simultaneously connected with an input of the negative electrode of Zener diode Vs2, one end of resistance R11 and NAND gate G4；The anode of Zener diode Vs2 and the other end ground connection of resistance R11；
Live wire L3 is simultaneously connected with one end of resistance R7 and one end of resistance R8, the other end of resistance R7 connects one end of neon indicator HL3, the other end of resistance R8 is simultaneously connected with the other end of neon indicator HL3 and the anode of diode VD3, the negative electrode of diode VD3 connects one end of resistance R9, and the other end of resistance R9 is simultaneously connected with another input of the negative electrode of Zener diode Vs3, one end of resistance R12 and NAND gate G1；The anode of Zener diode Vs3 and the other end ground connection of resistance R12；
The outfan of NAND gate G1 connects an input of NAND gate G3, and another input of NAND gate G3 connects the outfan of NAND gate G2；Another input of NAND gate G2 is simultaneously connected with the outfan of NAND gate G3 and another input of NAND gate G4；The outfan of NAND gate G4 connects one end of resistance R13, and the other end of resistance R13 connects the base stage of NPN audion VT1, and the colelctor electrode of NPN audion VT1 connects one end of auxiliary reclay K coil, and the other end of auxiliary reclay K coil connects+12V DC source；The emitter stage of NPN audion VT1 connects the anode of positive sequence display lamp LED, and the negative electrode of positive sequence display lamp LED connects one end of resistance R14, the other end ground connection of resistance R14；
Start button SB1, stop button SB2, auxiliary reclay K normally opened contact and A.C. contactor KM1 coil to be connected between live wire L3 and zero line N by single-phase circuit breaker QS2；
The normally opened auxiliary contact of A.C. contactor KM1 are connected in parallel on the two ends starting button SB1.
Advantage of the present utility model: three phase electric machine positive phase sequence safe starting control device described in the utility model arranges rationally, simple in construction, it is ensured that could start when motor is positive phase sequence, if phase sequence is not right, then motor cannot start, it is ensured that the safety of work.
Accompanying drawing explanation
Fig. 1 is the control circuit figure of three phase electric machine positive phase sequence safe starting control device described in the utility model.
Detailed description of the invention
Detailed description of the invention one: present embodiment is described below in conjunction with Fig. 1, three phase electric machine positive phase sequence safe starting control device described in present embodiment, pass sequentially through the normally opened main contacts KM1-1 of A.C. contactor KM1 and three-phase breaker QS1 including three-phase breaker QS1 and A.C. contactor KM1, three phase electric machine M and connect three live wires of three phase mains；And the A corresponding connection live wire L3 of corresponding connection live wire L1, B corresponding connection live wire L2, C of three phase electric machine M；
It is characterized in that, also include single-phase circuit breaker QS2, start button SB1, stop button SB2, auxiliary reclay K, NAND gate G1, NAND gate G2, NAND gate G3, NAND gate G4, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, diode VD1, diode VD2, diode VD3, Zener diode Vs1, Zener diode Vs2, Zener diode Vs3, NPN audion VT1, neon indicator HL1, neon indicator HL2, neon indicator HL3 and positive sequence display lamp LED；And provide working power by the circuit between the normally opened main contacts KM1-1 and circuit breaker Q S1 of A.C. contactor KM1；
Live wire L1 is simultaneously connected with one end of resistance R1 and one end of resistance R2, the other end of resistance R1 connects one end of neon indicator HL1, the other end of resistance R2 is simultaneously connected with the other end of neon indicator HL1 and the anode of diode VD1, the negative electrode of diode VD1 connects one end of resistance R3, and the other end of resistance R3 is simultaneously connected with an input of the negative electrode of Zener diode Vs1, one end of resistance R10, the input of NAND gate G2 and NAND gate G1；The anode of Zener diode Vs1 and the other end ground connection of resistance R10；
Live wire L2 is simultaneously connected with one end of resistance R4 and one end of resistance R5, the other end of resistance R4 connects one end of neon indicator HL2, the other end of resistance R5 is simultaneously connected with the other end of neon indicator HL2 and the anode of diode VD2, the negative electrode of diode VD2 connects one end of resistance R6, and the other end of resistance R6 is simultaneously connected with an input of the negative electrode of Zener diode Vs2, one end of resistance R11 and NAND gate G4；The anode of Zener diode Vs2 and the other end ground connection of resistance R11；
Live wire L3 is simultaneously connected with one end of resistance R7 and one end of resistance R8, the other end of resistance R7 connects one end of neon indicator HL3, the other end of resistance R8 is simultaneously connected with the other end of neon indicator HL3 and the anode of diode VD3, the negative electrode of diode VD3 connects one end of resistance R9, and the other end of resistance R9 is simultaneously connected with another input of the negative electrode of Zener diode Vs3, one end of resistance R12 and NAND gate G1；The anode of Zener diode Vs3 and the other end ground connection of resistance R12；
The outfan of NAND gate G1 connects an input of NAND gate G3, and another input of NAND gate G3 connects the outfan of NAND gate G2；Another input of NAND gate G2 is simultaneously connected with the outfan of NAND gate G3 and another input of NAND gate G4；The outfan of NAND gate G4 connects one end of resistance R13, and the other end of resistance R13 connects the base stage of NPN audion VT1, and the colelctor electrode of NPN audion VT1 connects one end of auxiliary reclay K coil, and the other end of auxiliary reclay K coil connects+12V DC source；The emitter stage of NPN audion VT1 connects the anode of positive sequence display lamp LED, and the negative electrode of positive sequence display lamp LED connects one end of resistance R14, the other end ground connection of resistance R14；
Start button SB1, stop button SB2, auxiliary reclay K normally opened contact and A.C. contactor KM1 coil to be connected between live wire L3 and zero line N by single-phase circuit breaker QS2；
The normally opened auxiliary contact of A.C. contactor KM1 are connected in parallel on the two ends starting button SB1.
Neon indicator HL1, neon indicator HL2 and neon indicator HL3 are along being arranged on same plectane clockwise or counterclockwise.
When three lamps are situation about arranging clockwise, if the wiring phase sequence of three phase electric machine M is positive phase sequence (A → B → C), then neon indicator HL1, neon indicator HL2 and neon indicator HL3 are along alternately luminescence clockwise, form clockwise flow point luminance；If the wiring phase sequence of three phase electric machine M is negative phase sequence (C → B → A, C → A → B or B → A → C), then three lamps press the luminescence of counterclockwise flow point or the luminescence of cross flow one point.
When three lamps are that situation about arranging counterclockwise is identical with principle time clockwise, be can determine whether by the state of the moment luminescence stream of three pins whether the phase sequence of three phase electric machine M is positive phase sequence.
Operation principle and process: close QS1, L1, L2, L3 provide 380V power supply；A phase power supply is after resistance R1, R2 current limliting blood pressure lowering, again by VD1 rectification, form low voltage pulse signal, this low voltage pulse signal exports to G1, G2 after R3 and Vs1 amplitude limit, shaping, B phase power supply is after resistance R4, R5 current limliting blood pressure lowering, again by VD2 rectification, forming low voltage pulse signal, this low voltage pulse signal exports to G4 after R6 and Vs2 amplitude limit, shaping；C phase power supply is after resistance R7, R8 current limliting blood pressure lowering, then by VD3 rectification, forms low voltage pulse signal, and this low voltage pulse signal exports to G1 after R9 and Vs3 amplitude limit, shaping；When phase sequence is positive phase sequence, LED is bright, and when phase sequence is incorrect, LED goes out.
Diode VD1～VD3 and Zener diode Vs1～Vs3 is transformed into rectangle logic-level pulses each sine wave.When for correct positive phase sequence, G4 exports a string rectangular pulse, and pulsewidth is about 2.5ns, loads trigger voltage to the base stage of VT1, and VT1 turns on, and K coil obtains electric, and its normally opened contact closes, then press SB1, KM1 coil and obtain electric, and KM1-1 closes, and starts three phase electric machine M smoothly.
When phase sequence is incorrect, G4 is output as zero, VT1 base stage triggerless voltage, VT1 ends, and K coil both end voltage is high voltage, pressure reduction is close to 0, K coil must not be electric, and its normally opened contact remains off, and the loop of KM1 coil is without working power, then electric without allowing KM1 coil obtain by SB1, then three phase electric machine M cannot start.
Detailed description of the invention two: present embodiment is the further restriction to embodiment one, also include three-phase thermorelay FR, the coil of three-phase thermorelay FR is connected with the stator winding of three phase electric machine M, and the normally closed interlock of three-phase thermorelay FR is connected on A.C. contactor KM1 coil institute in the loop.
Present embodiment be provided with the safety guarantee being beneficial to circuit.
Claims (3)
1. three phase electric machine positive phase sequence safe starting control device, passes sequentially through the normally opened main contacts KM1-1 of A.C. contactor KM1 and three-phase breaker QS1 including three-phase breaker QS1 and A.C. contactor KM1, three phase electric machine M and connects three live wires of three phase mains；And the A corresponding connection live wire L3 of corresponding connection live wire L1, B corresponding connection live wire L2, C of three phase electric machine M；
It is characterized in that, also include single-phase circuit breaker QS2, start button SB1, stop button SB2, auxiliary reclay K, NAND gate G1, NAND gate G2, NAND gate G3, NAND gate G4, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14, diode VD1, diode VD2, diode VD3, Zener diode Vs1, Zener diode Vs2, Zener diode Vs3, NPN audion VT1, neon indicator HL1, neon indicator HL2, neon indicator HL3 and positive sequence display lamp LED；And provide working power by the circuit between the normally opened main contacts KM1-1 and circuit breaker Q S1 of A.C. contactor KM1；
Live wire L1 is simultaneously connected with one end of resistance R1 and one end of resistance R2, the other end of resistance R1 connects one end of neon indicator HL1, the other end of resistance R2 is simultaneously connected with the other end of neon indicator HL1 and the anode of diode VD1, the negative electrode of diode VD1 connects one end of resistance R3, and the other end of resistance R3 is simultaneously connected with an input of the negative electrode of Zener diode Vs1, one end of resistance R10, the input of NAND gate G2 and NAND gate G1；The anode of Zener diode Vs1 and the other end ground connection of resistance R10；
Live wire L2 is simultaneously connected with one end of resistance R4 and one end of resistance R5, the other end of resistance R4 connects one end of neon indicator HL2, the other end of resistance R5 is simultaneously connected with the other end of neon indicator HL2 and the anode of diode VD2, the negative electrode of diode VD2 connects one end of resistance R6, and the other end of resistance R6 is simultaneously connected with an input of the negative electrode of Zener diode Vs2, one end of resistance R11 and NAND gate G4；The anode of Zener diode Vs2 and the other end ground connection of resistance R11；
Live wire L3 is simultaneously connected with one end of resistance R7 and one end of resistance R8, the other end of resistance R7 connects one end of neon indicator HL3, the other end of resistance R8 is simultaneously connected with the other end of neon indicator HL3 and the anode of diode VD3, the negative electrode of diode VD3 connects one end of resistance R9, and the other end of resistance R9 is simultaneously connected with another input of the negative electrode of Zener diode Vs3, one end of resistance R12 and NAND gate G1；The anode of Zener diode Vs3 and the other end ground connection of resistance R12；
The outfan of NAND gate G1 connects an input of NAND gate G3, and another input of NAND gate G3 connects the outfan of NAND gate G2；Another input of NAND gate G2 is simultaneously connected with the outfan of NAND gate G3 and another input of NAND gate G4；The outfan of NAND gate G4 connects one end of resistance R13, and the other end of resistance R13 connects the base stage of NPN audion VT1, and the colelctor electrode of NPN audion VT1 connects one end of auxiliary reclay K coil, and the other end of auxiliary reclay K coil connects+12V DC source；The emitter stage of NPN audion VT1 connects the anode of positive sequence display lamp LED, and the negative electrode of positive sequence display lamp LED connects one end of resistance R14, the other end ground connection of resistance R14；
Start button SB1, stop button SB2, auxiliary reclay K normally opened contact and A.C. contactor KM1 coil to be connected between live wire L3 and zero line N by single-phase circuit breaker QS2；
The normally opened auxiliary contact of A.C. contactor KM1 are connected in parallel on the two ends starting button SB1.
2. three phase electric machine positive phase sequence safe starting control device according to claim 1, it is characterized in that, also include three-phase thermorelay FR, the coil of three-phase thermorelay FR is connected with the stator winding of three phase electric machine M, and the normally closed interlock of three-phase thermorelay FR is connected on A.C. contactor KM1 coil institute in the loop.
3. three phase electric machine positive phase sequence safe starting control device according to claim 1, it is characterised in that neon indicator HL1, neon indicator HL2 and neon indicator HL3 are along being arranged on same plectane clockwise or counterclockwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620095502.1U CN205356198U (en) | 2016-01-29 | 2016-01-29 | Positive -phase -sequence safe start control device of three -phase electric machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620095502.1U CN205356198U (en) | 2016-01-29 | 2016-01-29 | Positive -phase -sequence safe start control device of three -phase electric machine |
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| CN205356198U true CN205356198U (en) | 2016-06-29 |
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| CN201620095502.1U Expired - Fee Related CN205356198U (en) | 2016-01-29 | 2016-01-29 | Positive -phase -sequence safe start control device of three -phase electric machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106340870A (en) * | 2016-10-31 | 2017-01-18 | 国家电网公司 | Assemble line detecting transmission motor's forward transmission control circuit |
| CN106849815A (en) * | 2016-11-22 | 2017-06-13 | 辽宁东鹰航空装备科技股份有限公司 | Electromotor control circuit |
-
2016
- 2016-01-29 CN CN201620095502.1U patent/CN205356198U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106340870A (en) * | 2016-10-31 | 2017-01-18 | 国家电网公司 | Assemble line detecting transmission motor's forward transmission control circuit |
| CN106849815A (en) * | 2016-11-22 | 2017-06-13 | 辽宁东鹰航空装备科技股份有限公司 | Electromotor control circuit |
| CN106849815B (en) * | 2016-11-22 | 2023-07-21 | 辽宁东鹰航空装备科技股份有限公司 | Motor control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160629 Termination date: 20170129 |