CN206976251U

CN206976251U - A kind of AC contactor dc operatioin energy-saving device with defencive function

Info

Publication number: CN206976251U
Application number: CN201720454699.8U
Authority: CN
Inventors: 金嘉宏
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-04-16
Filing date: 2017-04-16
Publication date: 2018-02-06
Anticipated expiration: 2027-04-16

Abstract

A kind of AC contactor dc operatioin energy-saving device with defencive function, during Contactor Starting, alternating current reaches C1 through diode D1 halfwave rectifier by coil J, speed-up capacitor C1 obtain it is electric after promote connect triode Q1 saturation conductions, starting current is very big, after the completion of circuit start, electric capacity C1 chargings, which finish, to be exited, resistance R1 continues as Q1 base stages and powers this, when circuit in electric current be greatly decreased, delay capacitor C2 chargings simultaneously finish, triode Q2 is turned on, thus further having dragged down Q1 base voltages makes electric current further reduce into normal operating phase, direct current starts, operation, reduce circuit loss, reduce noise, compact, it is simple in construction, cost is low, wiring is simple, it is not take up contacts of contactor, prevent coil burnout and protect probe of contactor, do not influence circuit logic.

Description

A kind of AC contactor dc operatioin energy-saving device with defencive function

Technical field：

The invention belongs to the energy-conservation of AC electromagnetic coil in power system, noise reduction, the attachment device of protection

Background technology：

A.C. contactor is power system, production system, the power switching device used extensively and largely, but in use It is big to there is electrical loss, noise, is often burnt because coil overheats, and contactor is damaged because magnet shakes, solves above-mentioned ask It is exactly to make its DC operation to inscribe preferable method, and DC operation can also reduce volume, reduces cost, but AC coil Operation has lacked the conversion started with operation, so can not directly apply, has there is many hairs at present equivalent to pure resistance in direct current Bright and technology can solve problems, can be due to that need to take contacts of contactor (such as normally opened, normally-closed contact) installation wiring numerous It is trivial, or volume is larger, is unfavorable for installing, or can not very well merge and cannot be widely popularized with present circuit logic.

The content of the invention：

The technical problems to be solved by the invention are：Simple, the volume according to a kind of flexible structure of prior art deficiency offer Small, cost is low, and power savings are obvious, and has the energy saver of protective effect to A.C. contactor.

The technical problems to be solved by the invention are realized by following scheme：

A kind of AC contactor dc operatioin energy-saving device with defencive function, it is characterised in that circuit is by AC power By being delayed, insurance F0 is connected with commutation diode D1 positive pole, and commutation diode D1 negative pole connects A.C. contactor AC coil J and coil following current diode D3 negative pole, another terminated line circle following current diode D3 of A.C. contactor AC coil J positive pole, Control pipe Q2 base resistance R2, coil current adjustment pipe Q1 colelctor electrodes, coil current adjustment pipe Q1 base biasing resistor R1, Coil current adjusts the start-up capacitance C1 of pipe, and electric current adjustment pipe Q1 emitter-base bandgap gradings connect circuit negative pole, and the base stage of coil current adjustment pipe is inclined The start-up capacitance C1 parallel connections for putting resistance R1, coil current adjustment pipe are followed by the current-limiting resistance R3 of coil current adjustment pipe base stage, line Another termination isolating diode D2 positive poles of current-limiting resistance R3 of loop current adjustment pipe base stage, isolating diode D2 negative pole connect control Pipe Q2 colelctor electrode, electric current adjustment pipe Q1 base stage, the protective resistance R4 of electric current adjustment pipe base stage, electric current adjust the guarantor of pipe base stage Protect resistance R4 another termination negative pole, control pipe base resistance R2 another termination delay capacitor C2 positive pole, control pipe base stage Voltage regulator resistor R5, control pipe Q2 base stages, the voltage regulator resistor R5 other ends of control pipe base stage, control pipe Q2 are penetrated Pole and delay capacitor C2 negative poles connect circuit negative pole,

A kind of AC contactor dc operatioin energy-saving device with defencive function, it is characterised in that circuit is that half-wave is whole Stream, without capacitor filtering, but is controlled as filter inductance, coil J startup, running current by triode Q1 in itself by the use of coil System, during circuit start, Q1 base stage speed-up capacitor is also that start-up capacitance C1 promotes Q1 to reach saturation conduction, and startup terminates rear C1 and moved back Go out.

A kind of AC contactor dc operatioin energy-saving device with defencive function, it is characterised in that due to speed-up capacitor C1 Repeated work needs discharge time, contactor quickly adhesive repeatedly in a short time is avoided, so C1 is also delay protection Electric capacity.

The present invention has the advantages that compared with prior art：Circuit is by continuing to optimize, all using electronics point Vertical element, flexible structure is simple, and small volume, cost is low, and power savings are obvious, and has protective effect to A.C. contactor.

Brief description of the drawings：

Fig. 1, a kind of AC contactor dc operatioin energy-saving device schematic diagram with defencive function；

Fig. 2, a kind of AC contactor dc operatioin energy-saving device power supply lead wire with defencive function, connect coil lead Wiring schematic diagram.

Above in each figure：F0 is delay insurance, and J is A.C. contactor AC coil, and D1 is commutation diode, and D2 is isolation Diode, D3 are coil following current diodes, and Q1 is coil current adjustment pipe, i.e. electric current adjustment pipe, and Q2 is that control coil electric current is adjusted The triode of homogeneous tube, i.e. control pipe, R1 are the base biasing resistor of coil current adjustment pipe and start-up capacitance C1 electric discharge electricity Resistance, R2 are control pipe base resistances, and R3 is the current-limiting resistance of coil current adjustment pipe base stage, and R4 is the guarantor of electric current adjustment pipe base stage Resistance, and its negative feedback resistor are protected, R5 is the voltage regulator resistor of control pipe base stage, and C1 is the startup of coil current adjustment pipe Electric capacity, C2 are the delay capacitors of control pipe, and 1 is a kind of AC contactor dc operatioin energy-saving device with defencive function；2 are First power supply lead wire；3 be second source lead；4 be first to connect coil lead；5 be second to connect coil lead.

Embodiment

During Contactor Starting, 220v alternating currents through diode D1 halfwave rectifier by coil J reach C1, electric capacity C1 obtain it is electric after Promote coil series connection triode Q1 saturation conductions, starting current is very big, is fully able to the startup requirement for meeting coil, and circuit opens Dynamic process is electric capacity C1 charging process, and after start completion, electric capacity C1 chargings, which finish, to be exited, and resistance R1 continues as the confession of Q1 base stages Electricity, now electric current significantly reduces in circuit, and resistance R1 is also start-up capacitance C1 discharge resistance, and increasing or reduction can change electricity The interval time of road restarting, while start-up capacitance C1 is exited, delay capacitor C2 chargings finish, triode Q2 conductings, by This, which has further dragged down Q1 base voltages, makes electric current further reduce, and start-up course terminates, and into normal operating phase, Q2's leads Leading to will be after circuit start completion, it is ensured that smoothly start, but can not be excessively slow, otherwise, coil will be because of lasting high current And burn, diode D2 is isolation capacitance C1 critical elements, avoids C1 from drawing high Q1 collector voltages, power supply lead wire 2 and power supply Lead 3 can be exchanged, and not distinguish, and connection can be exchanged by connecing coil lead 4 and connecing coil lead 5, without distinguishing.

When voltage pulsation or maloperation cause contactor quick adhesive repeatedly in a short time, because electric capacity C1, C2 will Have charge and discharge process, thus contactor in very short time again adhesive when do not reach entry condition and can not adhesive, now line Loop current is locked in the electric current of operation phase by triode Q1, so as to protect probe of contactor, also protects coil.

Advantages of the present invention is proved below by example, the present apparatus is connected to model cjx2-1210, coil voltage On 220v A.C. contactor, quick on-off electricity, contactor only make one-off in one second, although second is powered not Adhesive, test coil both end voltage is 11v, when being not added with the present apparatus, is connected and surveyed with universal meter, the operating electric current of coil is 58.1 milliamperes, and coil current is 8.7 milliamperes (alternating currents) after adding the present apparatus, economize on electricity more than 85%, adjusts R5, can be one Determine to change power output in scope, the volume of the present apparatus is about the 1/17 of contactor volume in addition, if collected the present apparatus Will be smaller into change and modularization, volume, just 2 yuan or so of the element cost of the present apparatus, if batch production cost can be lower.

If less demanding to contactor restarting interval time, it can be completed to start and be transported by major loop completely OK, so as to omit control loop, its advantage is that circuit is simpler, reduces cost, reduces volume, shortcoming is due to increase R1 Resistance, extend C1 discharge time, add the interval time of restarting.This circuit small volume, you can be placed on On contactor, it can also decompose and be placed on inside contactor.

Claims

1. a kind of AC contactor dc operatioin energy-saving device with defencive function, it is characterised in that circuit is led to by AC power Cross delay insurance F0 to be connected with commutation diode D1 positive pole, commutation diode D1 negative pole meets A.C. contactor AC coil J With coil following current diode D3 negative pole, another terminated line circle following current diode D3 of A.C. contactor AC coil J positive pole, control Tubulation Q2 base resistance R2, coil current adjustment pipe Q1 colelctor electrodes, coil current adjustment pipe Q1 base biasing resistor R1, line Loop current adjusts the start-up capacitance C1 of pipe, and electric current adjustment pipe Q1 emitter-base bandgap gradings connect circuit negative pole, and coil current adjusts the base bias of pipe Resistance R1, coil current adjustment pipe start-up capacitance C1 parallel connections are followed by the current-limiting resistance R3 of coil current adjustment pipe base stage, coil Another termination isolating diode D2 positive poles of current-limiting resistance R3 of electric current adjustment pipe base stage, isolating diode D2 negative pole connect control pipe Q2 colelctor electrode, electric current adjustment pipe Q1 base stage, the protective resistance R4 of electric current adjustment pipe base stage, electric current adjust the protection of pipe base stage Resistance R4 another termination negative pole, control pipe base resistance R2 another termination delay capacitor C2 positive pole, control pipe base stage Voltage regulator resistor R5, control pipe Q2 base stages, the voltage regulator resistor R5 other ends of control pipe base stage, control pipe Q2 emitter-base bandgap grading and Delay capacitor C2 negative poles connect circuit negative pole.

2. a kind of AC contactor dc operatioin energy-saving device with defencive function, its feature exist according to claim 1 It is halfwave rectifier in circuit, without capacitor filtering, but filter inductance, coil J startup, operation electricity is used as in itself by the use of coil Stream is controlled by triode Q1, and during circuit start, Q1 base stage speed-up capacitor is also that start-up capacitance C1 promotes Q1 to reach saturation conduction, Startup terminates rear C1 and exited.

3. a kind of AC contactor dc operatioin energy-saving device with defencive function, its feature exist according to claim 1 In needing discharge time due to speed-up capacitor C1 repeated works, contactor quickly adhesive repeatedly in a short time, institute are avoided Also it is delay protection electric capacity with C1.