CN201285715Y

CN201285715Y - Pulse excitation circuit

Info

Publication number: CN201285715Y
Application number: CNU2008201294765U
Authority: CN
Inventors: 吕永祥; 彭桂香
Original assignee: JILIN YONGDA ELECTRICAL SWITCH CO Ltd
Current assignee: JILIN YONGDA ELECTRICAL SWITCH CO Ltd
Priority date: 2008-08-13
Filing date: 2008-08-13
Publication date: 2009-08-05
Anticipated expiration: 2018-08-13

Abstract

The utility model relates to a pulse excitation circuit belonging to the power equipment control and protection technology field. The pulse excitation circuit takes a relay as a core element for controlling the interconversion of a working circuit and takes a controllable silicon and a triode as a triggering element; the relay, the controllable silicon and the triode are organically integrated into a circuit for controlling positive excitation and negative excitation; and the circuit is skillfully internally provided with a controllable silicon time-delaying triggering circuit, a capacitance voltage-stabilizing circuit, a capacitance continuous current circuit, a controllable silicon trigger signal cut-off circuit, a controllable silicon reverse cut-off circuit and a relay coil clamping circuit. The utility model solves the technical problem of switching heavy current by a relay, realizes the use of DC and AC of a control power supply and ensures the reliability of long-term stable operation.

Description

Pulse excitation circuit

Technical field

The utility model relates to a kind of pulse excitation circuit, and the especially improvement of magneto high-low pressure circuit breaker, contactor drive circuit belongs to power equipment control resist technology field.

Background technology

Magneto high-low pressure circuit breaker, the contactor of Chu Xianing all is to realize combined floodgate and separating brake basic operational functions by the upper and lower motion of moving iron core that pulse excitation circuit drives in the permanent magnet mechanism in recent years, in order to solve the deficiency that existing permanent magnet mechanism control technology exists, the applicant is in application number is 200710168271.8 patent of invention, disclose a kind of simple in structure, can reliably working steady in a long-term and economical and practical pulse excitation circuit with low cost, it is applicable to AC power control.

The utility model content

The purpose of this utility model is, a kind of pulse excitation circuit of controlling power supply can the alternating current-direct current dual-purpose is provided.

In order to achieve the above object, the utility model is 200710168271.8 pulse excitation circuit based on application number, in the forward energized circuit, set up the reverse cut-off circuit of controllable silicon, oppositely set up the relay control coil clamp circuit between energized circuit and the control loop.

Technical solutions of the utility model are as follows:

Exchange or DC control supply input A, B two ends cross-over connection piezo-resistance RV3 and resistance R 13, through diode D1, D2, D3, the output of D4 bridge rectifier, positive pole is connected with diode D5 series connection back and relay J normal battle 2, be connected across between positive pole and the negative pole after diode D8, resistance R 1, R2, the series connection of relay J control coil, cross-over connection capacitor C 1 and resistance R 3 between node 4 between resistance R 1, R2 and negative pole become the control loop of this circuit.Connect negative pole after relay J common port 3, coil L, controllable silicon K1, capacitor C 5 series connection, when the control loop energized, relay J common port 3 and normally closed point 1 separate to forward to normal the battle and 2 are connected and finish the loop conversion, the forward exciting capacity that becomes this circuit tank circuit that charges.Be connected across after 10 series connection of resistance R 6, diode D7, resistance R in the circuit between the node 8 and capacitor C 5 positive poles, capacitor C 4 is in parallel with resistance R 10, and controllable silicon K1 controls the utmost point and is connected with the positive pole of capacitor C 4, constitutes the controllable silicon K1 delay trigger circuit in this loop.Cross-over connection piezo-resistance RV1 between resistance R 6, diode D7 intermediate node 5 and negative pole constitutes the turn off thyristor K1 triggering signal circuit in this loop.Resistance R 7 is connected across capacitor C 5 freewheeling circuits that become this loop between node 8 and capacitor C 5 positive poles.Piezo-resistance RV2 be connected across capacitor C 5 tank circuit of voltage regulation that capacitor C 5 positive and negative electrode two ends constitute this loop after resistance R 11 is connected.In technical solution of the present utility model, be connected across after capacitor C 2 and the triggering element connected in series between the node 8 and negative pole between coil L, the controllable silicon K1 anode, reverse cross-over connection diode D10 between node 9 between capacitor C 2, the triggering element and the negative pole, the control end series resistance R12 of triggering element is connected with the node 6 between piezo-resistance RV2, the resistance R 11, constitutes the reverse cut-off circuit of controllable silicon K1 in this loop.Described triggering element is controllable silicon K3, and its control end is the control utmost point.Described triggering element can also be triode T2, and its control end is a base stage.Diode D6, be connected across between the positive pole and node 8 of capacitor C 5 after the controllable silicon K2 series connection, normally closed some series resistance R5 of relay connects negative pole, when the control loop dead electricity, relay J common port 3 with separate normal battle 2 after forward to again to be connected and finish the loop conversion once more with normally closed point 1, this is the reverse exciting capacity discharge loop of this circuit, resistance R 9, be connected across between diode D6 negative pole and the node 8 after the R8 series connection, the control utmost point of controllable silicon K2 and the positive pole of capacitor C 3 and resistance R 8, node 7 between the R9 connects, capacitor C 3 is in parallel with resistance R 8, constitutes the controllable silicon K2 delay trigger circuit in this loop.In technical solution of the present utility model, the base series resistor R4 of triode T is connected with the normally closed point 1 of relay J, collector electrode and emitter are connected across the two ends of control loop repeat circuit J control coil respectively, diode D9 oppositely is connected across collector electrode and emitter two ends, constitutes relay J control coil clamp circuit.

Above-mentioned the utility model is owing to be provided with the reverse cut-off circuit of controllable silicon dexterously in the forward energized circuit, expanded application number and be 200710168271.8 the pulse excitation circuit applicability to the control power supply.

Above-mentioned the utility model is owing to be provided with the relay control coil clamp circuit dexterously between the reverse energized circuit of application number 200710168271.8 pulse excitation circuits and control loop, make this circuit in the reverse energized circuit course of work, even the control power supply is connected once more or is subjected to pulse excitation and disturbs, relay control coil can not operate as normal, scaling loss or the adhesion of having avoided relay J contact switch pulse operating current to cause have guaranteed that effectively the overall process of reverse energized circuit work has high reliability.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the pulse excitation circuit of the utility model embodiment 1.

Fig. 2 is the pulse excitation circuit of the utility model embodiment 2.

Embodiment

Fig. 1 to Fig. 2 shows principle and whole course of work thereof of the utility model pulse excitation circuit.

Embodiment 1

Contrast Fig. 1, A, B two ends are the control power input, the power supply classification is for exchanging or direct current.When the power connection control loop, the adhesive of relay J control coil, common port 3 separates with normally closed point 1, turn to normal battle 2 and connection with it, constitute the forward exciting capacity tank circuit of this circuit, after the controllable silicon K1 conducting, operating current is by coil L forward excitation, and to capacitor C 5 charging energy storage, along with the voltage of through-flow time capacitor C 5 constantly raises, diode D7 ends when the current potential of capacitor C 5 equates with the current potential of node 5 in the circuit, controllable silicon K1 circuits for triggering quit work, piezo-resistance RV1 conducting, after the voltage of capacitor C 5 makes piezo-resistance RV2 conducting, capacitor C 5 beginning voltage stabilizing energy storage, controllable silicon K3 is triggered and conducting simultaneously, controllable silicon K3 conducting instantaneous, the voltage of capacitor C 2 is zero, the current potential of node 8 is lower than the current potential of capacitor C 5 in the circuit, controllable silicon K1 is reversed and ends, piezo-resistance RV1 open circuit, afterwards in the current potential uphill process of capacitor C 2, because the current potential of capacitor C 5 is higher than the current potential of node 5 in the circuit all the time, controllable silicon K1 delay trigger circuit no longer triggers in this course of work, when the current potential of capacitor C 2 rises to piezo-resistance RV1 once more after the conducting, the electric current of flowing through coil L only is the afterflow and the resistance R 6 of resistance R 7 branch roads, the electric current of piezo-resistance RV1 series arm.So far this circuit has been finished the course of work of forward exciting capacity charging tank circuit.

When this circuit needs reverse excitation, allow and exchange or the DC power supply dead electricity, the common port 3 of relay J will turn to normally closed point 1 from normal battle 2, in this process when the current potential of capacitor C 2 during greater than the control output potential of power supply, because diode D5 reverse cut-off current, coil L no current passes through, when the control electric power output voltage is reduced to when making the relay J control coil reach critical value, the relay J contact is finished the loop conversion with normal 2 mechanical disjunctions battle and with normally closed point 1 connection under the state of nothing stream, constituted the reverse exciting capacity discharge loop of this circuit, coil L is equivalent to open circuit this moment, and relay J contact machinery under the no current situation closes and closes.After this moment, the current potential of node 8 descends rapidly in the circuit, and the work of controllable silicon K2 delay trigger circuit makes controllable silicon K2 conducting, operating current go into negative pole through resistance R 5 and forms the loop, and makes the emitter junction of triode T be in forward bias.This moment, the current potential as node in the circuit 10 was lower than base potential, and triode T1 is operated in the saturation region, was subjected to the transient state pulse excitation as control loop this moment and disturbed, the collector junction of triode T1 is subjected to reverse biased, the β value increases, and the current potential of node 10 descends rapidly, and makes triode T1 enter the saturation region.This moment, triode T1 was operated in the amplification region as connecting control loop once more.The setting of relay J control coil clamp circuit, the overall process of having guaranteed the work of reverse exciting capacity discharge loop in all cases, the control coil of relay J all can not obtain being enough to make its contact to produce the electric current of displacement, only after the electric current of capacitor C 5 bleeds off, after controllable silicon K2, K3, triode T1 end, just can carry out the loop conversion.So far this circuit has been finished the course of work of reverse exciting capacity discharge loop.

Embodiment 2

Contrast Fig. 2, with Fig. 1 relatively, circuit structure and operation principle are identical, embodiment 2 has just replaced controllable silicon K3 among the embodiment 1 with triode T2.In the process of the forward exciting capacity of this circuit charging tank circuit work, after the voltage of capacitor C 5 makes piezo-resistance RV2 conducting, it is instantaneous that triode T2 works, the voltage of capacitor C 2 is zero, the current potential of node 8 is lower than the current potential of capacitor C 5 in the circuit, controllable silicon K1 is reversed and ends, and in addition, other the course of work is all identical with embodiment 1.

In addition to the implementation, the utility model can also have other execution mode, and all employings are equal to the technical scheme of alternative or equivalent transformation form, all in the claimed scope of the utility model.

Claims

1, a kind of pulse excitation circuit, form by control loop, forward exciting capacity charging tank circuit, reverse exciting capacity discharge loop, wherein, forward exciting capacity charging tank circuit comprises controllable silicon K1 delay trigger circuit, controllable silicon K1 triggering signal cut-off circuit, capacitor C 5 voltage stabilizings charging accumulator, capacitor C 5 freewheeling circuits, and oppositely the exciting capacity discharge loop comprises controllable silicon K2 delay trigger circuit; It is characterized in that: be connected across coil L after capacitor C 2 and the triggering element connected in series, between the node (8) and negative pole between the controllable silicon K1 anode, capacitor C 2, reverse cross-over connection diode D10 between node (9) between the triggering element and the negative pole, trigger the control end series resistance R12 and the piezo-resistance RV2 of element, node between the resistance R 11 (6) connects, constitute the reverse cut-off circuit of controllable silicon K1 in the forward exciting capacity charging tank circuit, the base series resistor R4 of triode T is connected with the normally closed point (1) of relay J, collector electrode, emitter is connected across the two ends of control loop repeat circuit J control coil, reverse cross-over connection diode D9 constitutes the relay J control coil clamp circuit between reverse exciting capacity discharge loop and control loop between node (10) and negative pole.