CN203931945U

CN203931945U - Multifunctional ac contactor expansion module

Info

Publication number: CN203931945U
Application number: CN201420347994.XU
Authority: CN
Inventors: 巫之德
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-06-27
Filing date: 2014-06-27
Publication date: 2014-11-05
Anticipated expiration: 2024-06-27

Abstract

The utility model discloses a kind of multifunctional ac contactor expansion module; comprise phase shortage, overload protecting circuit; failure alarm circuit; support the use with common A.C. contactor; large, the shake of noise while overcoming common A.C. contactor adhesive; power factor is low, power consumption is high, without phase shortage and overload protection function, to the shortcoming such as a little less than voltage fluctuation adaptive capacity.To the optimization of existing AC contactor expansion module and upgrading.Owing to having adopted DC supply, thus when work noiselessness, do not shake, power factor is high, little power consumption, economizing on energy and electricity; the voltage range adapting to is wide, has phase shortage, overload protection, fault alarm function, and dynamic and static iron core can adopt A3 sheet material or cast iron manufacture; processing is simple, and cost is low.

Description

Multifunctional ac contactor expansion module

Technical field

The utility model relates to A.C. contactor, relates in particular to a kind of expansion module that improves A.C. contactor performance, belongs to low voltage equipment technical field.

Background technology

A.C. contactor is in the market all to adopt electromagnetic principle substantially, by the switch on electromagnetic force driving mechanical transmission mechanism of generation of control coil, controls the break-make of major loop.The working power of this type of A.C. contactor is AC power, and requires from adhesive constant to the voltage that keeps supplying with.There is the shortcoming and defect part that much cannot overcome in existing A.C. contactor, as core material must adopt silicon steel sheet, high expensive; Power factor is low, and power consumption is large; To main circuit phase shortage and overload fault unprotect function; When line electricity is forced down, noise is large, the easy arcing of contact, not strong to the adaptive capacity of voltage fluctuation, and voltage does not have the possibility of burning control coil when rated value (too high or too low).Recent a kind of constant-magnet remaining AC contactor Wen city, has broken the situation that conventional A.C. contactor rules all the land, and it has the superiority such as economize on electricity, noiseless.But existing constant-magnet remaining AC contactor also exists the shortcoming can not be ignored, such as the reliability discharging is high, do not limited to use occasion, the problem such as without phase shortage and overload protection function, cost is high, the old and new's element replacement trouble.

Utility model content

The purpose of this utility model is to provide a kind of multifunctional ac contactor expansion module; support the use with common A.C. contactor; large, the shake of noise while overcoming common A.C. contactor adhesive; power factor is low, power consumption is high; without phase shortage and overload protection function, to the shortcoming such as a little less than voltage fluctuation adaptive capacity.To the optimization of existing AC contactor expansion module and upgrading.

The purpose of this utility model is achieved by the following technical programs:

A multifunctional ac contactor expansion module, comprises A.C. contactor CJ, diode D1, diode D7, diode D8, diode D9, diode D11, diode D13, rectifier bridge stack D2, rectifier bridge stack D3, rectifier bridge stack D4, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 6, capacitor C 7, capacitor C 8, capacitor C 9, capacitor C 10, capacitor C 11, capacitor C 12, voltage-stabiliser tube DZ1, voltage-stabiliser tube DZ2, inductance L 1, inductance CT1, inductance CT2, inductance CT3, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14, relay J 1, relay J 2, photoelectrical coupler IC1, photoelectrical coupler IC2, photoelectrical coupler IC3, photoelectrical coupler IC4, photoelectrical coupler IC5, 555 timer U1, triode Q1, triode Q2, controllable silicon SCR, adjustable resistance RP, alarm HAJL, LED 2, LED 3, LED 4, AC power L1 end connects one end of capacitor C 2 through the normally-closed contact J1-1 of relay J 1, 1 end is inputted in the interchange of another termination rectifier bridge stack D3 of capacitor C 2, the 2 termination AC power L2 ends of rectifier bridge stack D3, and the direct current of rectifier bridge stack D3 is exported 3 ends, 4 termination A.C. contactor CJ coil two ends, on a relay termination J1 normally-closed contact J1-1 of described relay J 2 normally opened contact J2-1 and the line of capacitor C 2, the anode of another terminating diode D1, the negative electrode of diode D1 connects the interchange of rectifier bridge stack D3 and inputs 1 end, 1 end is inputted in the interchange that AC power L1 end meets rectifier bridge stack D2 through capacitor C 3, exchange input 2 termination AC power L2 ends, the direct current of described rectifier bridge stack D2 is exported 4 end ground connection, direct current is exported 3 ends and through inductance L 1, is connect the negative electrode of voltage-stabiliser tube DZ1, the plus earth of voltage-stabiliser tube DZ1, AC power L1 end connects one end of capacitor C 12 through the normally opened contact J1-2 of relay J 1, 1 end is inputted in the interchange of capacitor C 12 another termination rectifier bridge stack D4, ac input end 2 connects AC power L2 end, its direct current output 3, 4 termination capacitor C5 two ends, resistance R 7 is connected with LED 4 and is jointly parallel to capacitor C 5 two ends with alarm HAJL again, capacitor C 4 is parallel to the two ends of voltage-stabiliser tube DZ1, the minus earth of capacitor C 4, the anode of capacitor C 4 is connected with one end of resistance R 2, the other end of resistance R 2 is connected with the anode of LED 2, the minus earth of LED 2, the positive pole of capacitor C 9 meets ten E, negative pole connects the light-emitting diodes tube anode of photoelectrical coupler IC5 through resistance R 13, the light-emitting diode minus earth of photoelectrical coupler IC5, diode D13 plus earth, diode D13 negative electrode is connected between capacitor C 9 and resistance R 13, one termination ten E of relay J 2 coils, the collector electrode of another termination triode Q2, the emitter of photoelectrical coupler IC5 triode is connected with the base stage of triode Q2, the grounded emitter of triode Q2, the anode of diode D11 connects the collector electrode of triode Q2, its negative electrode meets ten E, the collector electrode of photoelectrical coupler IC5 triode meets ten E after resistance R 12, the transistor collector of photoelectrical coupler IC1 meets ten E, the transistor emitter of photoelectrical coupler IC1 connects the transistor collector of photoelectrical coupler IC2, the transistor emitter of photoelectrical coupler IC2 connects the transistor collector of photoelectrical coupler IC3, the negative electrode of the light-emitting diode of the 1 termination photoelectrical coupler IC1 of inductance CT1, one end of the 2 terminating resistor R3 of inductance CT1, the anode of the light-emitting diode of another termination photoelectrical coupler IC1 of resistance R 3, the negative electrode of the light-emitting diode of the 1 termination photoelectrical coupler IC2 of inductance CT2, one end of the 2 terminating resistor R4 of inductance CT2, the anode of the light-emitting diode of another termination photoelectrical coupler IC2 of resistance R 4, the negative electrode of the light-emitting diode of the 1 termination photoelectrical coupler IC3 of inductance CT3, one end of the 2 terminating resistor R5 of inductance CT3, the anode of the light-emitting diode of another termination photoelectrical coupler IC3 of resistance R 5, the emitter of photoelectrical coupler IC3 connects capacitor C 6 positive poles, capacitor C 6 minus earths, the plus earth of voltage-stabiliser tube DZ2, the negative electrode of voltage-stabiliser tube DZ2 connects capacitor C 6 positive poles, one end of resistance R 10 is connected with the base stage of triode Q1, resistance R 10 another termination capacitor C 6 positive poles, the grounded emitter of triode Q1, resistance R 11 1 termination power ten E, the collector electrode of another termination triode Q1, the anode of diode D9, the positive pole of capacitor C 7, the minus earth of capacitor C 7, the negative electrode of diode D9 meets the trigger electrode G of controllable silicon SCR, the positive pole of capacitor C 8 meets the trigger electrode G of controllable silicon SCR, the minus earth of capacitor C 8, the anode of diode D8 connects the negative electrode of the light-emitting diode of photoelectrical coupler IC1, and the negative electrode of diode D8 connects one end of positive pole and the rheostat RP of capacitor C 10, and the negative pole of capacitor C 10 and the adjustable resistance RP other end meet respectively inductance CT1, inductance CT2, 2 ends of inductance CT3, adjustable resistance RP center-side connects the light-emitting diodes tube anode of photoelectrical coupler IC4 through LED 3, the light-emitting diodes tube cathode of photoelectrical coupler IC4 connects 2 ends of inductance CT3, the transistor emitter ground connection of photoelectrical coupler IC4, collector electrode meets 2 of 555 timer U1 by resistance R 9, 6 pin, the 1 pin ground connection of 555 timer U1,4 pin, 8 pin meet ten E, capacitor C 11 1 termination ten E, 2 pin of capacitor C 11 another termination 555 timer U1, 6 pin, 3 pin of 555 timer U1 are by diode D7, resistance R 6 meets the trigger electrode G of controllable silicon SCR, and one end of relay J 1 coil meets ten E by K switch 1, the anode A of another termination controllable silicon SCR, the negative electrode K ground connection of controllable silicon SCR.

The purpose of this utility model can also further realize by following technical measures:

Aforementioned a kind of multifunctional ac contactor expansion module, wherein the dynamic and static iron core of A.C. contactor CJ adopts the manufacture of A3 sheet material.

Aforementioned a kind of multifunctional ac contactor expansion module, wherein the dynamic and static iron core of A.C. contactor CJ adopts cast iron manufacture.

Compared with prior art; the beneficial effects of the utility model are: owing to having adopted DC supply; so when work noiselessness, do not shake; power factor is high, little power consumption; the voltage range adapting to is wide, has phase shortage, overload protection, fault alarm function, and dynamic and static iron core can adopt A3 sheet material or cast iron manufacture; processing is simple, and cost is low.

Accompanying drawing explanation

Fig. 1 is circuit diagram of the present utility model.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

As shown in Figure 1, the utility model multifunctional ac contactor expansion module, comprises A.C. contactor CJ, diode D1, diode D7, diode D8, diode D9, diode D11, diode D13, rectifier bridge stack D2, rectifier bridge stack D3, rectifier bridge stack D4, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 6, capacitor C 7, capacitor C 8, capacitor C 9, capacitor C 10, capacitor C 11, capacitor C 12, voltage-stabiliser tube DZ1, voltage-stabiliser tube DZ2, inductance L 1, inductance CT1, inductance CT2, inductance CT3, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14, relay J 1, relay J 2, photoelectrical coupler IC1, photoelectrical coupler IC2, photoelectrical coupler IC3, photoelectrical coupler IC4, photoelectrical coupler IC5, 555 timer U1, triode Q1, triode Q2, controllable silicon SCR, adjustable resistance RP, alarm HAJL, LED 2, LED 3, LED 4, AC power L1 end connects one end of capacitor C 2 through the normally-closed contact J1-1 of relay J 1, 1 end is inputted in the interchange of another termination rectifier bridge stack D3 of capacitor C 2, the 2 termination AC power L2 ends of rectifier bridge stack D3, and the direct current of rectifier bridge stack D3 is exported 3 ends, 4 termination A.C. contactor CJ coil two ends, on a relay termination J1 normally-closed contact J1-1 of described relay J 2 normally opened contact J2-1 and the line of capacitor C 2, the anode of another terminating diode D1, the negative electrode of diode D1 connects the interchange of rectifier bridge stack D3 and inputs 1 end, 1 end is inputted in the interchange that AC power L1 end meets rectifier bridge stack D2 through capacitor C 3, exchange input 2 termination AC power L2 ends, the direct current of described rectifier bridge stack D2 is exported 4 end ground connection, direct current is exported 3 ends and through inductance L 1, is connect the negative electrode of voltage-stabiliser tube DZ1, the plus earth of voltage-stabiliser tube DZ1, AC power L1 end connects one end of capacitor C 12 through the normally opened contact J1-2 of relay J 1, 1 end is inputted in the interchange of capacitor C 12 another termination rectifier bridge stack D4, ac input end 2 connects AC power L2 end, its direct current output 3, 4 termination capacitor C5 two ends, resistance R 7 is connected with LED 4 and is jointly parallel to capacitor C 5 two ends with alarm HAJL again, capacitor C 4 is parallel to the two ends of voltage-stabiliser tube DZ1, the minus earth of capacitor C 4, the anode of capacitor C 4 is connected with one end of resistance R 2, the other end of resistance R 2 is connected with the anode of LED 2, the minus earth of LED 2, the positive pole of capacitor C 9 meets ten E, negative pole connects the light-emitting diodes tube anode of photoelectrical coupler IC5 through resistance R 13, the light-emitting diode minus earth of photoelectrical coupler IC5, diode D13 plus earth, diode D13 negative electrode is connected between capacitor C 9 and resistance R 13, one termination ten E of relay J 2 coils, the collector electrode of another termination triode Q2, the emitter of photoelectrical coupler IC5 triode is connected with the base stage of triode Q2, the grounded emitter of triode Q2, the anode of diode D11 connects the collector electrode of triode Q2, its negative electrode meets ten E, the collector electrode of photoelectrical coupler IC5 triode meets ten E after resistance R 12, the transistor collector of photoelectrical coupler IC1 meets ten E, the transistor emitter of photoelectrical coupler IC1 connects the transistor collector of photoelectrical coupler IC2, the transistor emitter of photoelectrical coupler IC2 connects the transistor collector of photoelectrical coupler IC3, the negative electrode of the light-emitting diode of the 1 termination photoelectrical coupler IC1 of inductance CT1, one end of the 2 terminating resistor R3 of inductance CT1, the anode of the light-emitting diode of another termination photoelectrical coupler IC1 of resistance R 3, the negative electrode of the light-emitting diode of the 1 termination photoelectrical coupler IC2 of inductance CT2, one end of the 2 terminating resistor R4 of inductance CT2, the anode of the light-emitting diode of another termination photoelectrical coupler IC2 of resistance R 4, the negative electrode of the light-emitting diode of the 1 termination photoelectrical coupler IC3 of inductance CT3, one end of the 2 terminating resistor R5 of inductance CT3, the anode of the light-emitting diode of another termination photoelectrical coupler IC3 of resistance R 5, the emitter of photoelectrical coupler IC3 connects capacitor C 6 positive poles, capacitor C 6 minus earths, the plus earth of voltage-stabiliser tube DZ2, the negative electrode of voltage-stabiliser tube DZ2 connects capacitor C 6 positive poles, one end of resistance R 10 is connected with the base stage of triode Q1, resistance R 10 another termination capacitor C 6 positive poles, the grounded emitter of triode Q1, resistance R 11 1 termination power ten E, the collector electrode of another termination triode Q1, the anode of diode D9, the positive pole of capacitor C 7, the minus earth of capacitor C 7, the negative electrode of diode D9 meets the trigger electrode G of controllable silicon SCR, the positive pole of capacitor C 8 meets the trigger electrode G of controllable silicon SCR, the minus earth of capacitor C 8, the anode of diode D8 connects the negative electrode of the light-emitting diode of photoelectrical coupler IC1, and the negative electrode of diode D8 connects one end of positive pole and the rheostat RP of capacitor C 10, and the negative pole of capacitor C 10 and the adjustable resistance RP other end meet respectively inductance CT1, inductance CT2, 2 ends of inductance CT3, adjustable resistance RP center-side connects the light-emitting diodes tube anode of photoelectrical coupler IC4 through LED 3, the light-emitting diodes tube cathode of photoelectrical coupler IC4 connects 2 ends of inductance CT3, the transistor emitter ground connection of photoelectrical coupler IC4, collector electrode meets 2 of 555 timer U1 by resistance R 9, 6 pin, the 1 pin ground connection of 555 timer U1,4 pin, 8 pin meet ten E, capacitor C 11 1 termination ten E, 2 pin of capacitor C 11 another termination 555 timer U1, 6 pin, 3 pin of 555 timer U1 are by diode D7, resistance R 6 meets the trigger electrode G of controllable silicon SCR, and one end of relay J 1 coil meets ten E by K switch 1, the anode A of another termination controllable silicon SCR, the negative electrode K ground connection of controllable silicon SCR.

First of the present utility model is adhesive and the holding circuit of CJ, adopts high direct voltage adhesive low pressure to keep principle, by C9, and R12, R13, IC5, Q2, J2, D11, C2, D1, D3, C5 and CJ coil complete.Second portion is phase shortage and overload protecting circuit, the AND circuit that adopts three-phase current signal to form, then form OR circuit with over-current signal; amplify and drive relay J 1, realize and control dividing, closing, by IC1-4 of CJ; IC6, CT1-3, optocoupler IC1-IC4; IC6, triode Q1, R3-R11; C6-C11, D8-D10, DZ2; SCR, J1 forms.Third part is warning circuit, is that after J1 work, J1-1 contact disconnects, and CJ loses and maintains power supply and discharge, and J1-2 dynamic circuit connector, provides warning power supply to system simultaneously, specifically by J1-2, and C12, D4, C13, R7, LED4, HAJL, forms.

The A of take is example mutually, and A phase load current collector is by instrument transformer CT1, IC1, and R3 forms.CT1 is current transformer, transfers A phase load current signal to voltage signal, and with the light-emitting diode of optocoupler IC1, current-limiting resistance R5 forms loop.When having positive half cycle current to flow through the light-emitting diode primary side of IC1, the secondary side of its IC1 can be equivalent to high resistant and transfer low-resistance to, and power supply ten E cross IC1 secondary side.IC2 in like manner flows through, IC3, through C6 filtering, DZ2 voltage stabilizing by R10 be added to Q1 inverter, C7 rises and prolongs function, when having three-phase current signal, Q1 is saturated, and diode D9 no signal removes to trigger controllable silicon, therefore relay J 1 is not worked, its normally-closed contact J1-1 connects AC power puts A.C. contactor CJ into operation.When phase shortage, with gate logic upset, J1 adhesive, its break contact J1-1 cuts off AC power circuit, contactor CJ is discharged, thereby play default-phase protection function.Another road is the negative half-cycle current obtaining from CT1, the voltage that is added to C10 and the taking-up preliminary election of potentiometer RP Bing Cong RP center after D8 rectification is added to LED 3 and optocoupler IC4 light-emitting diode, the brightness of LED 3 and optocoupler IC4 light-emitting diode is followed the size of current that CT1 asks for and is directly proportional, the size of current of therefore also automatically asking for according to CT1, equivalence has changed bis-resistances of CT1, ic chip 6 is to use its delay function, CT1 is equivalent to C11 discharge resistance bis-times, when 2, when 6 pin voltages are less than 2/3E, 3 pin output high level, pass through D7, R6 touches out controlled silicon conducting, J1 adhesive, J1-1 is disconnected, thereby CJ discharges, J1-2 connects, pass through C12, D4 and HAJL and report to the police.

The utility model expansion module can with direct supporting the installing and using of general A.C. contactor, only expansion module need be arranged on to the inner appropriate location of the A.C. contactor supporting with it.Owing to using DC power supply to offer contactor coil work, dynamic and static iron core can adopt A3 sheet material or cast iron manufacture, and production cost declines more than 15%.Voltage all can normally be worked in ± 20% fluctuation.Compared with similar products, economize on electricity is greater than 90%, and power factor is high, and adhesive noiselessness has good defencive function and warning system, and volume is little, easy for installation.

In addition to the implementation, the utility model can also have other execution modes, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection range of the utility model requirement.

Claims

1. a multifunctional ac contactor expansion module, is characterized in that, comprises A.C. contactor CJ, diode D1, diode D7, diode D8, diode D9, diode D11, diode D13, rectifier bridge stack D2, rectifier bridge stack D3, rectifier bridge stack D4, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 6, capacitor C 7, capacitor C 8, capacitor C 9, capacitor C 10, capacitor C 11, capacitor C 12, voltage-stabiliser tube DZ1, voltage-stabiliser tube DZ2, inductance L 1, inductance CT1, inductance CT2, inductance CT3, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14, relay J 1, relay J 2, photoelectrical coupler IC1, photoelectrical coupler IC2, photoelectrical coupler IC3, photoelectrical coupler IC4, photoelectrical coupler IC5, 555 timer U1, triode Q1, triode Q2, controllable silicon SCR, adjustable resistance RP, alarm HAJL, LED 2, LED 3, LED 4, AC power L1 end connects one end of capacitor C 2 through the normally-closed contact J1-1 of relay J 1, 1 end is inputted in the interchange of another termination rectifier bridge stack D3 of capacitor C 2, the 2 termination AC power L2 ends of rectifier bridge stack D3, and the direct current of rectifier bridge stack D3 is exported 3 ends, 4 termination A.C. contactor CJ coil two ends, on a relay termination J1 normally-closed contact J1-1 of described relay J 2 normally opened contact J2-1 and the line of capacitor C 2, the anode of another terminating diode D1, the negative electrode of diode D1 connects the interchange of rectifier bridge stack D3 and inputs 1 end, 1 end is inputted in the interchange that AC power L1 end meets rectifier bridge stack D2 through capacitor C 3, exchange input 2 termination AC power L2 ends, the direct current of described rectifier bridge stack D2 is exported 4 end ground connection, direct current is exported 3 ends and through inductance L 1, is connect the negative electrode of voltage-stabiliser tube DZ1, the plus earth of voltage-stabiliser tube DZ1, AC power L1 end connects one end of capacitor C 12 through the normally opened contact J1-2 of relay J 1, 1 end is inputted in the interchange of capacitor C 12 another termination rectifier bridge stack D4, ac input end 2 connects AC power L2 end, its direct current output 3, 4 termination capacitor C5 two ends, resistance R 7 is connected with LED 4 and is jointly parallel to capacitor C 5 two ends with alarm HAJL again, capacitor C 4 is parallel to the two ends of voltage-stabiliser tube DZ1, the minus earth of capacitor C 4, the anode of capacitor C 4 is connected with one end of resistance R 2, the other end of resistance R 2 is connected with the anode of LED 2, the minus earth of LED 2, the positive pole of capacitor C 9 meets ten E, negative pole connects the light-emitting diodes tube anode of photoelectrical coupler IC5 through resistance R 13, the light-emitting diode minus earth of photoelectrical coupler IC5, diode D13 plus earth, diode D13 negative electrode is connected between capacitor C 9 and resistance R 13, one termination ten E of relay J 2 coils, the collector electrode of another termination triode Q2, the emitter of photoelectrical coupler IC5 triode is connected with the base stage of triode Q2, the grounded emitter of triode Q2, the anode of diode D11 connects the collector electrode of triode Q2, its negative electrode meets ten E, the collector electrode of photoelectrical coupler IC5 triode meets ten E after resistance R 12, the transistor collector of photoelectrical coupler IC1 meets ten E, the transistor emitter of photoelectrical coupler IC1 connects the transistor collector of photoelectrical coupler IC2, the transistor emitter of photoelectrical coupler IC2 connects the transistor collector of photoelectrical coupler IC3, the negative electrode of the light-emitting diode of the 1 termination photoelectrical coupler IC1 of inductance CT1, one end of the 2 terminating resistor R3 of inductance CT1, the anode of the light-emitting diode of another termination photoelectrical coupler IC1 of resistance R 3, the negative electrode of the light-emitting diode of the 1 termination photoelectrical coupler IC2 of inductance CT2, one end of the 2 terminating resistor R4 of inductance CT2, the anode of the light-emitting diode of another termination photoelectrical coupler IC2 of resistance R 4, the negative electrode of the light-emitting diode of the 1 termination photoelectrical coupler IC3 of inductance CT3, one end of the 2 terminating resistor R5 of inductance CT3, the anode of the light-emitting diode of another termination photoelectrical coupler IC3 of resistance R 5, the emitter of photoelectrical coupler IC3 connects capacitor C 6 positive poles, capacitor C 6 minus earths, the plus earth of voltage-stabiliser tube DZ2, the negative electrode of voltage-stabiliser tube DZ2 connects capacitor C 6 positive poles, one end of resistance R 10 is connected with the base stage of triode Q1, resistance R 10 another termination capacitor C 6 positive poles, the grounded emitter of triode Q1, resistance R 11 1 termination power ten E, the collector electrode of another termination triode Q1, the anode of diode D9, the positive pole of capacitor C 7, the minus earth of capacitor C 7, the negative electrode of diode D9 meets the trigger electrode G of controllable silicon SCR, the positive pole of capacitor C 8 meets the trigger electrode G of controllable silicon SCR, the minus earth of capacitor C 8, the anode of diode D8 connects the negative electrode of the light-emitting diode of photoelectrical coupler IC1, and the negative electrode of diode D8 connects one end of positive pole and the rheostat RP of capacitor C 10, and the negative pole of capacitor C 10 and the adjustable resistance RP other end meet respectively inductance CT1, inductance CT2, 2 ends of inductance CT3, adjustable resistance RP center-side connects the light-emitting diodes tube anode of photoelectrical coupler IC4 through LED 3, the light-emitting diodes tube cathode of photoelectrical coupler IC4 connects 2 ends of inductance CT3, the transistor emitter ground connection of photoelectrical coupler IC4, collector electrode meets 2 of 555 timer U1 by resistance R 9, 6 pin, the 1 pin ground connection of 555 timer U1,4 pin, 8 pin meet ten E, capacitor C 11 1 termination ten E, 2 pin of capacitor C 11 another termination 555 timer U1, 6 pin, 3 pin of 555 timer U1 are by diode D7, resistance R 6 meets the trigger electrode G of controllable silicon SCR, and one end of relay J 1 coil meets ten E by K switch 1, the anode A of another termination controllable silicon SCR, the negative electrode K ground connection of controllable silicon SCR.