CN202564137U

CN202564137U - Starting circuit module

Info

Publication number: CN202564137U
Application number: CN2012201996533U
Authority: CN
Inventors: 苗健
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-07
Filing date: 2012-05-07
Publication date: 2012-11-28
Anticipated expiration: 2022-05-07

Abstract

The utility model relates to a starting circuit which specifically is a starting circuit module, in particular to a starting circuit module which comprises a relay. The starting circuit module solves the problems that an existing starting circuit including a relay is low in utilization rate and high in cost, and breakdowns occur frequently. The starting circuit module comprises a unijunction transister (V1), wherein an emitting electrode (e) of the unijunction transister (V1) is connected with a first electric resistor (R1) and a positive electrode of a first electrolytic capacitor (C1), a negative electrode of the first electrolytic capacitor (C1) is connected with ground, a second base electrode (b2) of the unijunction transister (V1) is connected with a second electric resistor (R2), a first base electrode (b1) of the unijunction transister (V1) is connected with the ground through a third electric resistor (R3), the first base electrode (b1) of the unijunction transister (V1) is connected with a base electrode of a crystal triode (V2), and an emitting electrode of the crystal triode (V2) is connected with the ground. The starting circuit module is simple in structure and reasonable in design.

Description

The start-up circuit module

Technical field

The utility model relates to start-up circuit, is specially a kind of start-up circuit module, particularly a kind of start-up circuit module that comprises relay.

Background technology

In real work, it is stable that supply voltage can not continue always, the fluctuation that in a scope, does not stop through regular meeting.At present; The start-up circuit that comprises relay is in real work; As long as supply voltage is lower than the pick-up voltage of relay, relay is with regard to cisco unity malfunction, and this makes relay in the start-up circuit because the continuous fluctuation of supply voltage and often can't operate as normal; So that damage very soon, cause the existing start-up circuit of relay that comprises to have the shortcoming that service efficiency is low, fault takes place frequently, cost is high thus.

Find through experiment, in case after the relay adhesive, just can about half of its rated voltage, work reliably down.Therefore, if make its adhesive for starting resistor of relay (greater than its pick-up voltage), and then be allowed to condition at that operate as normal just can address the above problem under the lower supply voltage in when beginning.Therefore, be necessary to invent a kind of novel start-up circuit module that comprises relay.

Summary of the invention

The utility model provides a kind of novel start-up circuit module that comprises relay in order to solve the existing problem that the start-up circuit service efficiency is low, fault takes place frequently, cost is high that comprises relay.

The utility model is to adopt following technical scheme to realize: a kind of start-up circuit module; Comprise: unijunction transistor V1; The emitter e of unijunction transistor V1 is connected with first resistance R 1 and emitter e is connected with the positive pole of the first electrochemical capacitor C1; The minus earth of the first electrochemical capacitor C1, the second base stage b2 of unijunction transistor V1 is connected with second resistance R 2, and the first base stage b1 of unijunction transistor V1 is through the 3rd resistance R 3 ground connection; The first base stage b1 of unijunction transistor V1 is connected with the base stage of transistor V2; The grounded emitter of transistor V2; The collector electrode of transistor V2 is connected with the 4th resistance R 4 and collector electrode is connected with the positive pole of the second electrochemical capacitor C2; The negative pole of the second electrochemical capacitor C2 is connected with the anode of the first crystal diode D1, the minus earth of the first crystal diode D1; The common port of first resistance R 1, second resistance R 2, the 4th resistance R 4 is connected with power supply+Vcc through relay normally-closed contact J1-2, stop button AN2, start button AN1 successively; The intermediate node of the second electrochemical capacitor C2 and the first crystal diode D1 is connected with the end of relay coil J, and the other end of relay coil J is connected with the negative electrode of unidirectional controllable silicon S CR; The first base stage b1 of unijunction transistor V1 is connected with the anode of the second crystal diode D2, and the negative electrode of the second crystal diode D2 is connected with the positive pole of the 3rd electrochemical capacitor C3, and the negative pole of the 3rd electrochemical capacitor C3 is connected with the control utmost point of unidirectional controllable silicon S CR; The anode of unidirectional controllable silicon S CR is connected with the intermediate node of relay normally-closed contact J1-2 and stop button AN2; The two ends of start button AN1 are parallel with relay normally open contact J1-1.

During work, as shown in Figure 1, the unijunction transistor V1 and first resistance R 1, second resistance R 2, the 3rd resistance R 3, the first electrochemical capacitor C1 form a relaxation formula oscillator.Press start button AN1, power on circuitry, because unidirectional controllable silicon S CR does not have triggering signal, thus not conducting of unidirectional controllable silicon S CR, the relay attonity.Power supply+Vcc charges to rapidly that (this moment, the voltage difference at the second electrochemical capacitor C2 two ends was Vcc-V near supply voltage for the second electrochemical capacitor C2 through the 4th resistance R 4 and the first crystal diode D1 _D1).Simultaneously, power supply+Vcc gives the first electrochemical capacitor C1 charging through first resistance R 1, after the several seconds; When the voltage on the first electrochemical capacitor C1 reached the trigger voltage of unijunction transistor V1, through unijunction transistor V1 discharge, the first base stage b1 of unijunction transistor V1 sent a positive pulse to the first electrochemical capacitor C1 immediately; This pulse one tunnel triggers the base stage of transistor V2; Make the rapid saturation conduction of transistor V2, the positive pole of the second electrochemical capacitor C2 (being the collector electrode of transistor V2) is similar to ground connection, at this moment; Be filled with positive polarity voltage on the second electrochemical capacitor C2, the pressure reduction at the first crystal diode D1 two ends is about V _D1-(Vcc-V _D1) ≈-Vcc, promptly the voltage of relay coil one end is about-Vcc.In transistor V2 triggering and conducting; Another road of this pulse second crystal diode D2, the 3rd electrochemical capacitor C3 go to trigger unidirectional controllable silicon S CR conducting; After the unidirectional controllable silicon S CR conducting; The other end voltage of relay coil J is approximately supply voltage, and promptly the other end voltage of relay coil J is about+Vcc.So; The first base stage b1 at unijunction transistor V1 sends the moment that positive pulse almost triggers transistor V2 and unidirectional controllable silicon S CR conducting simultaneously, and the voltage difference at relay coil J two ends is approximately the supply voltage of twice (greater than the pick-up voltage of relay), and relay moves reliably; Be that relay normally open contact J1-1 is closed; Relay normally-closed contact J1-2 breaks off, and cuts off the power supply to unijunction transistor V1, transistor V2, the relay self-insurance; At this moment, relay operate as normal under near power supply+Vcc voltage.When needs stop, pressing stop button AN2, the relay outage discharges, and quits work.

Based on said process, can make relay under its pick-up voltage (promptly being similar to the supply voltage of twice), after the adhesive, just can under lower supply voltage, continue reliable work.Often fluctuate even the input of lower supply voltage is unstable; But as long as it satisfies greater than the relay rated voltage half; Just can not influence the operate as normal of relay, the feasible operate as normal that comprises the start-up circuit of relay no longer receives the influence of lower mains fluctuations.

The utility model is simple in structure, reasonable in design, after being connected to load circuit, plays the effect of switch, has solved the existing problem that the start-up circuit service efficiency is low, fault takes place frequently, cost is high that comprises relay well.

Description of drawings

Fig. 1 is the circuit theory diagrams of the described start-up circuit module of the utility model.

Among the figure, V1-unijunction transistor, V2-transistor; The SCR-one-way SCR, J-relay coil, J1-1-relay normally open contact; J1-2-relay normally-closed contact, AN1-start button, AN2-stop button; D1, first and second crystal diode of D2-, C1, C2, first, second and third electrochemical capacitor of C3-.

Embodiment

Embodiment to the utility model is elaborated below in conjunction with accompanying drawing.

As shown in Figure 1; A kind of start-up circuit module; Comprise: unijunction transistor V1, the emitter e of unijunction transistor V1 is connected with first resistance R 1 and emitter e is connected the minus earth of the first electrochemical capacitor C1 with the positive pole of the first electrochemical capacitor C1; The second base stage b2 of unijunction transistor V1 is connected with second resistance R 2, and the first base stage b1 of unijunction transistor V1 is through the 3rd resistance R 3 ground connection; The first base stage b1 of unijunction transistor V1 is connected with the base stage of transistor V2; The grounded emitter of transistor V2; The collector electrode of transistor V2 is connected with the 4th resistance R 4 and collector electrode is connected with the positive pole of the second electrochemical capacitor C2; The negative pole of the second electrochemical capacitor C2 is connected with the anode of the first crystal diode D1, the minus earth of the first crystal diode D1; The common port of first resistance R 1, second resistance R 2, the 4th resistance R 4 is connected with power supply+Vcc through relay normally-closed contact J1-2, stop button AN2, start button AN1 successively; The intermediate node of the second electrochemical capacitor C2 and the first crystal diode D1 is connected with the end of relay coil J, and the other end of relay coil J is connected with the negative electrode of unidirectional controllable silicon S CR; The first base stage b1 of unijunction transistor V1 is connected with the anode of the second crystal diode D2, and the negative electrode of the second crystal diode D2 is connected with the positive pole of the 3rd electrochemical capacitor C3, and the negative pole of the 3rd electrochemical capacitor C3 is connected with the control utmost point of unidirectional controllable silicon S CR; The anode of unidirectional controllable silicon S CR is connected with the intermediate node of relay normally-closed contact J1-2 and stop button AN2; The two ends of start button AN1 are parallel with relay normally open contact J1-1.

During practical implementation; The model of unijunction transistor V1 is selected BT33C for use; The rated voltage of relay is 1.5 times of power supply+Vcc voltage; The also available bidirectional triode thyristor of unidirectional controllable silicon S CR replaces, the withstand voltage twice that should be not less than power supply+Vcc voltage of the second electrochemical capacitor C2, and the height of withstand voltage visual power supply+Vcc voltage of the first electrochemical capacitor C1, the 3rd electrochemical capacitor C3, transistor V2 is chosen.

Claims

1. start-up circuit module; It is characterized in that: comprise unijunction transistor (V1); The emitter (e) of unijunction transistor (V1) is connected with first resistance (R1) and emitter (e) is connected with the positive pole of first electrochemical capacitor (C1); The minus earth of first electrochemical capacitor (C1), second base stage (b2) of unijunction transistor (V1) is connected with second resistance (R2), and first base stage (b1) of unijunction transistor (V1) is through the 3rd resistance (R3) ground connection;

First base stage (b1) of unijunction transistor (V1) is connected with the base stage of transistor (V2); The grounded emitter of transistor (V2); The collector electrode of transistor (V2) is connected with the 4th resistance (R4) and collector electrode is connected with the positive pole of second electrochemical capacitor (C2); The negative pole of second electrochemical capacitor (C2) is connected with the anode of first crystal diode (D1), the minus earth of first crystal diode (D1);

The common port of first resistance (R1), second resistance (R2), the 4th resistance (R4) successively through relay normally-closed contact (J1-2), stop button (AN2), start button (AN1) and power supply (+Vcc) be connected;

The intermediate node of second electrochemical capacitor (C2) and first crystal diode (D1) is connected with an end of relay coil (J), and the other end of relay coil (J) is connected with the negative electrode of one-way SCR (SCR);

First base stage (b1) of unijunction transistor (V1) is connected with the anode of second crystal diode (D2); The negative electrode of second crystal diode (D2) is connected with the positive pole of the 3rd electrochemical capacitor (C3), and the negative pole of the 3rd electrochemical capacitor (C3) is connected with the control utmost point of one-way SCR (SCR); The anode of one-way SCR (SCR) is connected with the intermediate node of relay normally-closed contact (J1-2) with stop button (AN2);

The two ends of start button (AN1) are parallel with relay normally open contact (J1-1).