CN205004732U

CN205004732U - Contactless relay protection ware of intelligent motor power isolation

Info

Publication number: CN205004732U
Application number: CN201520828301.3U
Authority: CN
Inventors: 介国安
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-10-16
Filing date: 2015-10-16
Publication date: 2016-01-27
Anticipated expiration: 2025-10-16

Abstract

The utility model discloses contactless relay protection ware of intelligent motor power isolation, protector power isolation contactless relay adopts high countervoltage triode or compound triode and bridge rectifier to constitute alternating current switch, high countervoltage triode or the emitter control of compound triode base by optical coupling isolator, optical coupling isolator's collector supply is provided by switching power supply secondary winding or solitary isolation power, control signal makes protector power isolation contactless relay switch on the contactor of control forceful electric power circuit through optical coupling isolation drive triode, design the overall arrangement of planning circuit board and contactless relay circuit of protector power isolation and motor protector can be lumped together, can reduce circuit face sum of products volume. Have contactless, small, safe and reliable, the fields such as motor protection of being applied to that can be extensive.

Description

Intelligent motor isolated from power contactless relay protector

Technical field:

The utility model relates to pump class protector, motor protector, Intelligent Asynohornized Protector field, particularly intelligent motor isolated from power contactless relay protector.

Technical background:

Existing solid-state relay also claims contactless relay or noncontacting switch, because the reasons such as version, volume, price are only applicable to some low-voltage electrical apparatus control field, inapplicable motor protector control device.Conventional Miniature direct current relay is all adopted in current all kinds of motor protector, the A.C. contactor controlling forceful electric power is removed with the contact of Miniature direct current relay, shortcoming has contact, life-span is short, volume large circuit board not easily layout, operational environment is restricted, eight, the nineties once adopted controllable silicon to replace relay in the simple and easy protector of motor, because there is the equipment that multiple relay can not be replaced to control several functions, in all kinds of protector that more can not be used for intelligent control and equipment thereof, and all forceful electric power light current circuit positions are all with high voltage, there is hidden danger, seldom adopted similar control mode in the last few years.

Summary of the invention

The purpose of this utility model invents a kind of intelligent motor isolated from power contactless relay protector for above-mentioned defect, high countervoltage triode or compound transistor and bridge rectifier is adopted to form alternating-current switch, high countervoltage triode or compound transistor base stage are controlled by the emitter of optical coupling isolator, the collector supply of optical coupling isolator can be provided by transistor collector, also can be provided by independent insulating power supply, control signal drives triode to make the conducting of protector isolated from power contactless relay control the contactor of forceful electric power circuit through optical coupling isolator, circuit of the present invention is simple, use protector stabilized voltage power supply or Switching Power Supply and realize optical coupling isolator and power transformer isolation dual resisteance, guarantee the control that motor protector is safe and reliable, and design planning circuit-board laying-out of protector isolated from power contactless relay circuit and motor protector can being lumped together, board area and volume can be reduced.

The technical solution of the utility model is intelligent motor isolated from power contactless relay protector, it is characterized in that being made up of together with Intelligent Asynohornized Protector circuit with protector isolated from power contactless relay DJ2 protector isolated from power contactless relay DJ1, switching mode power supply transformer increases the insulating power supply of two secondary winding optical coupling isolator collector electrode in rectifying and voltage-stabilizing is as isolated from power contactless relay, control isolated from power contactless relay by starting button respectively through intelligent protection circuit and open motor, the current signal of current transformer also makes motor shut down through intelligent protection circuit Control protection device isolated from power contactless relay in overcurrent or three-phase imbalance, protector isolated from power contactless relay adopts high countervoltage triode or compound transistor and bridge rectifier to form non-contact alternating-current switch circuit, high countervoltage triode or compound transistor base stage are controlled by the emitter of optical coupling isolator, the collector supply of optical coupling isolator is provided by independent insulating power supply, realize insulating power supply and the two isolation of optical coupling isolator, by mutually isolated for the protecting control circuit of non-contact alternating-current switch circuit and low-voltage, control signal drives triode through optical coupling isolator, the contactor controlling forceful electric power circuit is removed in non-contact alternating-current switch circuit turn-on and protector isolated from power contactless relay DJ conducting, its circuit structure is A phase power supply a, B phase power supply b is connected the main contacts of A.C. contactor KM1 and the main contacts of A.C. contactor KM2 with C phase power supply c, A phase power supply a1, B phase power supply b1 and C phase power supply c1 runs through A phase current mutual inductor LA respectively, B phase current mutual inductor LB goes to be connected motor M with C phase current mutual inductor LC again, the secondary coil of A phase current mutual inductor LA, the secondary coil of B phase current mutual inductor LB is connected intelligent protection circuit Q1 respectively with the secondary coil of C phase current mutual inductor LC, forward starts Ans Button QZ one end and connects positive supply VD, forward starts Ans the Button QZ other end and connects intelligent protection circuit Q1, back-to-back starting is Aned Button QF one end and is connected positive supply VD, back-to-back starting is Aned the Button QF other end and is connected intelligent protection circuit Q1, stop button TM one end connects positive supply VD, the stop button TM other end connects intelligent protection circuit Q1, the light-emitting diode two ends of optical coupling isolator Q2 in the control signal S1 connection protector isolated from power contactless relay DJ1 that intelligent protection circuit Q1 exports, the collector electrode contact resistance R1 of optical coupling isolator Q2, the other end of resistance R1 connects insulating power supply positive pole VD1, the base stage of the emitter connecting triode BG1 of optical coupling isolator Q2 and resistance R2, the emitter of the other end connecting triode BG1 of resistance R2, the positive pole of diode D3, the positive pole of diode D4 and insulating power supply negative pole VD2, the collector electrode of triode BG1 connects the negative pole of diode D1 and the negative pole of diode D3, the light-emitting diode two ends of optical coupling isolator Q3 in the control signal S2 connection protector isolated from power contactless relay DJ2 that intelligent protection circuit Q1 exports, the collector electrode contact resistance R3 of optical coupling isolator Q3, the other end of resistance R3 connects insulating power supply positive pole VD3, the base stage of the emitter connecting triode BG2 of optical coupling isolator Q3 and resistance R4, the emitter of the other end connecting triode BG2 of resistance R4, the positive pole of diode D7, the positive pole of diode D8 and insulating power supply negative pole VD4, the collector electrode of triode BG2 connects the negative pole of diode D5 and the negative pole of diode D6, the Alternating Current Power Supply end of A phase power supply a connecting valve power supply KD, the positive pole of diode D2 and the negative pole of diode D4, the positive pole of diode D6 and the negative pole of diode D8, another Alternating Current Power Supply end of C phase power supply c connecting valve power supply KD, the interlocking contact of A.C. contactor KM1 and the interlocking contact of A.C. contactor KM2, A.C. contactor KM1 interlocks the coil of the other end connection A.C. contactor KM2 of contact, A.C. contactor KM2 interlocks the coil of the other end connection A.C. contactor KM1 of contact, A.C. contactor KM1 coil the other end connect the positive pole of diode D1 and the negative pole of diode D3, A.C. contactor KM2 coil the other end connect the positive pole of diode D5 and the negative pole of diode D7, switching mode power supply transformer T is by switching mode power supply transformer winding TL1, switching mode power supply transformer secondary winding TL2, switching mode power supply transformer secondary winding TL3, switching mode power supply transformer secondary winding TL4 and switching mode power supply transformer secondary winding TL5 forms, switching mode power supply transformer secondary winding TL4 connects insulating power supply WD1, switching mode power supply transformer secondary winding TL5 connects insulating power supply WD2, Switching Power Supply KD exports positive supply VD, negative supply VC and power supply common port VE, forward starts Ans Button QZ, back-to-back starting is Aned Button QF and is connected positive supply VD with one end of stop button TM, the other end connects intelligent protection circuit Q1.

The protector isolated from power contactless relay of the utility model intelligent motor isolated from power contactless relay protector adopts high countervoltage triode or compound transistor and bridge rectifier to form alternating-current switch, high countervoltage triode or compound transistor base stage are controlled by the emitter of optical coupling isolator, the collector supply of optical coupling isolator is provided by Switching Power Supply secondary winding insulating power supply, control signal drives triode to make the conducting of protector isolated from power contactless relay control the contactor of forceful electric power circuit through light-coupled isolation, have contactless, volume is little, safe and reliable, the field such as motor protecting device and electric automatization control can be widely used in.

Accompanying drawing explanation

Fig. 1, intelligent motor isolated from power contactless relay protector circuit theory schematic diagram

ZBH smart circuit motor protector in Fig. 1, aA phase power supply, bB phase power supply, cC phase power supply, a1A phase power supply, b1B phase power supply, c1C phase power supply, M motor, KM1 A.C. contactor, KM2 A.C. contactor, QZ forward starts Ans Button, Button is Aned in QF back-to-back starting, TM stop button, KD Switching Power Supply, T switching mode power supply transformer, TL1 switching mode power supply transformer winding, TL2-5TL5 switching mode power supply transformer secondary winding, WD1-WD2 stabilized voltage power supply, VD positive supply, VC negative supply, VE power supply common port, VD1 insulating power supply positive pole, VD2 insulating power supply negative pole VD3 insulating power supply positive pole, VD4 insulating power supply negative pole, LAA phase current mutual inductor, LBB phase current mutual inductor, LCC phase current mutual inductor, Q1 intelligent protection circuit, DJ1-DJ2 protector isolated from power contactless relay, R1-R4 resistance, D1-D8 diode, BG1-BG2 triode, Q2-Q3 optical coupling isolator, S1-S2 control signal.

Embodiment

Fig. 1 is intelligent motor isolated from power contactless relay protector circuit theory diagrams, circuit working principle is that pressure forward starts An Button QZ, the control signal S1 that intelligent protection circuit Q1 exports makes protector isolated from power contactless relay DJ1 conducting, A.C. contactor KM1 adhesive, motor M starting operation, A phase current mutual inductor LA, the current signal of B phase current mutual inductor LB and C phase current mutual inductor LC controls through intelligent protection circuit Q1, when motor M occur overload flow or disconnected mutually and three-phase imbalance time, the control signal S1 that intelligent protection circuit Q1 exports makes protector isolated from power contactless relay DJ1 disconnect, when motor M stops.Protector isolated from power contactless relay circuit working principle is the LED operation of optical coupling isolator when having control signal; insulating power supply is powered to the collector electrode of optical coupling isolator; the collector electrode of optical coupling isolator and the emitter conducting of optical coupling isolator; triode saturation conduction; triode and the conducting of diode bridge rectification composition non-contact alternating-current switch; A.C. contactor adhesive, when control signal disconnects, A.C. contactor turns off the object reaching control thereupon.Embodiment is that isolated from power contactless relay forms relay non-contact circuit together with Intelligent Asynohornized Protector circuit, switching mode power supply transformer increases the insulating power supply of two secondary winding optical coupling isolator collector electrode in rectifying and voltage-stabilizing is as isolated from power contactless relay, control isolated from power contactless relay by starting button respectively through intelligent protection circuit and open motor, the current signal of current transformer also controls isolated from power contactless relay through intelligent protection circuit makes motor shut down in overcurrent or three-phase imbalance, its circuit structure is A phase power supply a, B phase power supply b is connected the main contacts of A.C. contactor KM1 and the main contacts of A.C. contactor KM2 with C phase power supply c, A phase power supply a1, B phase power supply b1 and C phase power supply c1 runs through A phase current mutual inductor LA respectively, B phase current mutual inductor LB goes to be connected motor M with C phase current mutual inductor LC again, the secondary coil of A phase current mutual inductor LA, the secondary coil of B phase current mutual inductor LB is connected intelligent protection circuit Q1 respectively with the secondary coil of C phase current mutual inductor LC, forward starts Ans Button QZ one end and connects positive supply VD, forward starts Ans the Button QZ other end and connects intelligent protection circuit Q1, back-to-back starting is Aned Button QF one end and is connected positive supply VD, back-to-back starting is Aned the Button QF other end and is connected intelligent protection circuit Q1, stop button TM one end connects positive supply VD, the stop button TM other end connects intelligent protection circuit Q1, the light-emitting diode two ends of optical coupling isolator Q2 in the control signal S1 connection protector isolated from power contactless relay DJ1 that intelligent protection circuit Q1 exports, the collector electrode contact resistance R1 of optical coupling isolator Q2, the other end of electricity R1 connects insulating power supply positive pole VD1, the base stage of the emitter connecting triode BG1 of optical coupling isolator Q2 and resistance R2, the emitter of the other end connecting triode BG1 of resistance R2, the positive pole of diode D3, the positive pole of diode D4 and insulating power supply negative pole VD2, the collector electrode of triode BG1 connects the negative pole of diode D1 and the negative pole of diode D3, the light-emitting diode two ends of optical coupling isolator Q3 in the control signal S2 connection protector isolated from power contactless relay DJ2 that intelligent protection circuit Q1 exports, the collector electrode contact resistance R3 of optical coupling isolator Q3, the other end of resistance R3 connects insulating power supply positive pole VD3, the base stage of the emitter connecting triode BG2 of optical coupling isolator Q3 and resistance R4, the emitter of the other end connecting triode BG2 of resistance R4, the positive pole of diode D7, the positive pole of diode D8 and insulating power supply negative pole VD4, the collector electrode of triode BG2 connects the negative pole of diode D5 and the negative pole of diode D6, the Alternating Current Power Supply end of A phase power supply a connecting valve power supply KD, the positive pole of diode D2 and the negative pole of diode D4, the positive pole of diode D6 and the negative pole of diode D8, another Alternating Current Power Supply end of C phase power supply c connecting valve power supply KD, the interlocking contact of A.C. contactor KM1 and the interlocking contact of A.C. contactor KM2, A.C. contactor KM1 interlocks the coil of the other end connection A.C. contactor KM2 of contact, A.C. contactor KM2 interlocks the coil of the other end connection A.C. contactor KM1 of contact, A.C. contactor KM1 coil the other end connect the positive pole of diode D1 and the negative pole of diode D3, A.C. contactor KM2 coil the other end connect the positive pole of diode D5 and the negative pole of diode D7, switching mode power supply transformer T is by switching mode power supply transformer winding TL1, switching mode power supply transformer secondary winding TL2, switching mode power supply transformer secondary winding TL3, switching mode power supply transformer secondary winding TL4 and switching mode power supply transformer secondary winding TL5 forms, switching mode power supply transformer secondary winding TL4 connects insulating power supply WD1, switching mode power supply transformer secondary winding TL5 connects insulating power supply WD2, Switching Power Supply KD exports positive supply VD, negative supply VC and power supply common port VE, forward starts Ans Button QZ, back-to-back starting is Aned Button QF and is connected positive supply VD with one end of stop button TM, the other end connects intelligent protection circuit Q1.

Claims

1. intelligent motor isolated from power contactless relay protector, it is characterized in that being made up of together with Intelligent Asynohornized Protector circuit with protector isolated from power contactless relay DJ2 protector isolated from power contactless relay DJ1, switching mode power supply transformer increases the insulating power supply of two secondary winding optical coupling isolator collector electrode in rectifying and voltage-stabilizing is as isolated from power contactless relay, control isolated from power contactless relay by starting button respectively through intelligent protection circuit and open motor, the current signal of current transformer also controls isolated from power contactless relay through intelligent protection circuit makes motor shut down in overcurrent or three-phase imbalance, its circuit structure is A phase power supply a, B phase power supply b is connected the main contacts of A.C. contactor KM1 and the main contacts of A.C. contactor KM2 with C phase power supply c, A phase power supply a1, B phase power supply b1 and C phase power supply c1 runs through A phase current mutual inductor LA respectively, B phase current mutual inductor LB goes to be connected motor M with C phase current mutual inductor LC again, the secondary coil of A phase current mutual inductor LA, the secondary coil of B phase current mutual inductor LB is connected intelligent protection circuit Q1 respectively with the secondary coil of C phase current mutual inductor LC, forward starts Ans Button 5QZ one end and connects positive supply 5VD, forward starts Ans the Button 5QZ other end and connects intelligent protection circuit Q1, back-to-back starting is Aned Button QF one end and is connected positive supply VD, back-to-back starting is Aned the Button QF other end and is connected intelligent protection circuit Q1, stop button TM one end connects positive supply VD, the stop button TM other end connects intelligent protection circuit Q1, the light-emitting diode two ends of optical coupling isolator Q2 in the control signal S1 connection protector isolated from power contactless relay DJ1 that intelligent protection circuit Q1 exports, the collector electrode contact resistance R1 of optical coupling isolator Q2, the other end of resistance R1 connects insulating power supply positive pole VD1, the base stage of the emitter connecting triode GB1 of optical coupling isolator Q2 and resistance R2, the emitter of the other end connecting triode BG1 of resistance R2, the positive pole of diode D3, the positive pole of diode D4 and insulating power supply negative pole VD2, the collector electrode of triode BG1 connects the negative pole of diode D1 and the negative pole of diode D3, the light-emitting diode two ends of optical coupling isolator Q3 in the control signal S2 connection protector isolated from power contactless relay DJ2 that intelligent protection circuit Q1 exports, the collector electrode contact resistance R3 of optical coupling isolator Q3, the other end of resistance R3 connects insulating power supply positive pole VD3, the base stage of the emitter connecting triode G2 of optical coupling isolator Q3 and resistance R4, the emitter of the other end connecting triode BG2 of resistance R4, the positive pole of diode D7, the positive pole of diode D8 and insulating power supply negative pole VD4, the collector electrode of triode BG2 connects the negative pole of diode D5 and the negative pole of diode D6, the Alternating Current Power Supply end of A phase power supply a connecting valve power supply KD, the positive pole of diode D2 and the negative pole of diode D4, the positive pole of diode D6 and the negative pole of diode D8, another Alternating Current Power Supply end of C phase power supply c connecting valve power supply KD, the interlocking contact of A.C. contactor KM1 and the interlocking contact of A.C. contactor KM2, A.C. contactor KM1 interlocks the coil of the other end connection A.C. contactor KM2 of contact, A.C. contactor KM2 interlocks the coil of the other end connection A.C. contactor KM1 of contact, A.C. contactor KM1 coil the other end connect the positive pole of diode D1 and the negative pole of diode D3, A.C. contactor KM2 coil the other end connect the positive pole of diode D5 and the negative pole of diode D7, switching mode power supply transformer T is by switching mode power supply transformer winding TL1, switching mode power supply transformer secondary winding TL2, switching mode power supply transformer secondary winding TL3, switching mode power supply transformer secondary winding TL4 and switching mode power supply transformer secondary winding TL5 forms, switching mode power supply transformer secondary winding TL4 connects insulating power supply WD1, switching mode power supply transformer secondary winding TL5 connects insulating power supply WD2, Switching Power Supply KD exports positive supply VD, negative supply VC and power supply common port VE, forward starts Ans Button QZ, back-to-back starting is Aned Button QF and is connected positive supply VD with one end of stop button TM, the other end connects intelligent protection circuit Q1.