CN1068967C

CN1068967C - Monostable pulse electromagnetic valve and electromagnetic relay drive circuit for AC

Info

Publication number: CN1068967C
Application number: CN96101861A
Authority: CN
Inventors: 杨国灿; 石林江
Original assignee: HENGGUANG REFRIGERATING FITTINGS FACTORY HUANGYAN CITY
Current assignee: HENGGUANG REFRIGERATING FITTINGS FACTORY HUANGYAN CITY
Priority date: 1996-02-08
Filing date: 1996-02-08
Publication date: 2001-07-25
Anticipated expiration: 2016-02-08
Also published as: CN1156894A

Abstract

The present invention discloses a driving circuit for a monostable pulse electromagnetic valve and an electromagnetic relay for alternating current, which comprises a charging circuit, a triggering loop, a voltage-stabilizing loop, a discharging loop and a balanced loop, wherein the charging circuit is formed in a mode that diodes D1, D2, a capacitor C2, an electromagnetic coil L are connected in series; the triggering loop is composed of a resistor R1 and a triggering tube NR and is established by the gate 2 of a thyristor T; after a capacitor C2 is connected with an electromagnetic coil L in series, the capacitor C2 and the electromagnetic coil L are connected with the gate 2 of the thyristor T in parallel; the voltage-stabilizing loop is formed in a mode that a resistor R1, the capacitors C1, C2 and the electromagnetic coil L are connected in series; the discharging loop is composed of the capacitor C2, the electromagnetic coil L, a resistor R3 and the thyristor T; the balanced loop is composed of the resistors R1, R2, the capacitor C2 and the electromagnetic coil L. The driving circuit of the present invention has the advantage of simplicity; the electromagnetic valve and the electromagnetic relay which is made of the driving circuit have the advantages of no temperature rise and low energy consumption, can always switched on and switched off, and are compatible.

Description

Exchange drive circuit with monostable impulse electromagnetic valve and electromagnetic relay

The present invention relates to exchange drive circuit technical field with impulse electromagnetic valve and electromagnetic relay.

At present traditional monostable electromagnetically operated valve, the electromagnetic relay that uses mainly made by solenoid, and in use, solenoid needs long-term energize, not only power consumption, and make the solenoid heating up, and the time solenoid of burning phenomenon arranged.The disclosed bi-stable pulse electromagnetic valve of Chinese patent CN91213045.8 needs to use special power pulse generation systems, and can't be integral with electromagnetically operated valve and relay system, therefore can not replace traditional monostable electromagnetically operated valve and electromagnetic relay fully.

It is simple to the purpose of this invention is to provide a kind of circuit, low cost of manufacture, and can make one with electromagnetically operated valve and electromagnetic relay, produce the monostable impulse electromagnetic valve of positive back pulse, the drive circuit of electromagnetic relay by the control of external power power on/off.

The objective of the invention is to realize by following technical proposals.Exchange drive circuit with monostable impulse electromagnetic valve and electromagnetic relay, it has: by diode, electric capacity, the charging circuit that solenoid is in series, and by electric capacity, solenoid series connection back is in parallel with thyristor, again by gate circuit transistor gate series connection NR, the triggering loop that resistance is formed, have by resistance, electric capacity, the loop of voltage regulation that solenoid is in series, also have by electric capacity, solenoid, resistance, the discharge loop that thyristor is in series, charging circuit is in series with the triggering loop, loop of voltage regulation also connects and charging circuit, discharge loop and loop of voltage regulation are in series, loop of voltage regulation can guarantee when exchanging negative half period, trigger that the loop is unlikely triggers, the discharge loop effect is when disconnecting extrinsic current, in solenoid, produce and the opposite pulse current of electric capacity charging direction, thereby in solenoid, produce the opposite pulsed magnetic field of direction when charging.

The drive circuit that exchanges with monostable impulse electromagnetic valve and electromagnetic relay also has the balanced loop that is composed in series by resistance, electric capacity, solenoid, connect with discharge loop in the balanced loop, the effect in this loop is when the external power variation in voltage, guarantees that charging capacitor both end voltage and external power voltage are consistent.

Because the present invention has adopted technique scheme, therefore have following advantage: circuit is simple, low cost of manufacture, and can be directly and electromagnetically operated valve, electromagnetic relay is made of one, therefore can cancel bi-stable pulse electromagnetic valve, the independent power pulse control system of electromagnetic relay, electromagnetically operated valve and the electromagnetic relay made by the drive circuit of this invention have the characteristics of no temperature rise, low energy consumption, again owing to electromagnetically operated valve and the electromagnetic relay made with this drive circuit are also used the permanent magnet self-insurance.Therefore, its monostable impulse electromagnetic valve made and electromagnetic relay often have open, the characteristics of normally closed compatible one.

Below in conjunction with accompanying drawing the present invention is described in further detail.

Fig. 1 is a drive circuit schematic diagram of the present invention.

Fig. 2 is an another embodiment of the present invention drive circuit schematic diagram.

Fig. 3 is an another embodiment of the present invention drive circuit schematic diagram.

Fig. 1 is the drive circuit schematic diagram that the present invention preferentially selects for use.This circuit comprises by diode D ₁, D ₂And capacitor C ₂, the charging circuit that is in series of solenoid L, this circuit directly is connected on power supply V _RSTwo ends are to form charging current pulse, diode D ₁Play rectified action, can be connected on power supply R end, also can be connected on the S end, diode D ₂And capacitor C ₂The node A of junction is connected on the negative electrode 6 of thyristor T, diode D ₁Positive pole and diode D ₂Negative pole form node B mutually, diode D ₁Negative pole connect power supply R end.

This drive circuit also is capacitor C ₂, solenoid L series connection back thyristor T gate pole 2 in parallel establishes by trigger tube NR, resistance R ₁The triggering loop of forming, thyristor T can be P gate pole or n gate pole, also can be bidirectional thyristor, as external power V _RSDuring disconnection, trigger tube NR triggers, thyristor T conducting.Trigger tube NR one termination gate circuit transistor gate 2, the other end is connected on the node B.Trigger tube NR can use diac, also can be with the voltage stabilizing didoe and the piezo-resistance of relevant voltage value.

This drive circuit also has by resistance R ₁, capacitor C ₁, C ₂Reach the loop of voltage regulation that solenoid L is in series, capacitor C ₁With diode D ₂Parallel connection, capacitor C ₁An end and resistance R ₁Become node B, resistance R after joining ₁Another termination power S end, this loop of voltage regulation are used to control the trigger voltage that A, B point-to-point transmission voltage are no more than trigger tube NR.

This drive circuit also has by capacitor C ₂, solenoid L, resistance R ₃, the discharge loop formed of thyristor T, resistance R ₃One terminates on the anode 4 of thyristor T, another termination power S end, and its effect is when external power disconnects, and produces and capacitor C in solenoid L ₂The opposite pulse current of direction during charging, thus produce and capacitor C ₂The opposite pulsed magnetic field of direction during charging, resistance R ₃Be used for controlling the size of discharge time and discharging current, its value is 0 to several kilohms.

This drive circuit also has by resistance R ₁, R ₂, capacitor C ₂, the balanced loop formed of solenoid L, resistance R ₂A termination node A, other end binding place B, its effect be when the external power voltage instability regularly, can make charging capacitor C ₂The voltage at two ends and external power V _RSVoltage is consistent.If external power voltage is more stable, can save the balanced loop, can save resistance R ₂

The course of work of the present invention is as follows: as power supply V _RSConnect moment, power supply is through diode D ₁Rectification is the dc pulse electric current, through solenoid L to capacitor C ₂Charging produces a pulse current, thereby produces a pulse electromagnetic field in solenoid L, node A, B both end voltage are diode D at this moment ₂Forward drop during forward conduction, trigger tube NR does not trigger, and thyristor T ends, (diode D when external power voltage is in negative half period ₂By the stage) capacitor C ₂Through solenoid L, resistance R ₁To capacitor C ₁Charging is because resistance R ₁Be worth very big, more than hundreds of kilo-ohm, capacitor C ₁Both end voltage rises very slow, when consequently second direct impulse arrives, and capacitor C ₁Both end voltage is that trigger tube NR both end voltage can't reach trigger voltage, after power connection, only produces a charge pulse currents at solenoid L place like this.

When external power disconnects, capacitor C ₂Immediately through solenoid L, resistance R ₁To capacitor C ₁Charging is until capacitor C ₁Both end voltage is that trigger tube NR both end voltage surpasses trigger voltage, triggers thyristor T conducting, capacitor C ₂Through solenoid L, resistance R ₃Discharge, thus a bigger discharge pulse current produced, in coil L, produce a pulsed magnetic field.

Fig. 2 and Fig. 3 are the drive circuit figure of other two embodiment of the present invention, and its operation principle is same as described above.

Claims

1, a kind of drive circuit that exchanges with monostable impulse electromagnetic valve and electromagnetic relay, it is characterized in that: it has by diode (D1, D2), electric capacity (C2), the charging circuit that solenoid (L) is in series, and by electric capacity (C2), solenoid (L) series connection back is in parallel with thyristor (T), again by thyristor (T) gate pole (2) series connection (NR), the triggering loop that resistance (R1) is formed, have by resistance (R1), electric capacity (C1, C2), the loop of voltage regulation that solenoid (L) is in series, also have by electric capacity (C2), solenoid (L), resistance (R3), the discharge loop that thyristor (T) is in series, charging circuit is in series with the triggering loop, loop of voltage regulation also connects and charging circuit, discharge loop and loop of voltage regulation are in series, loop of voltage regulation can guarantee when exchanging negative half period, trigger that the loop is unlikely triggers, discharge loop is done the time spent when disconnecting extrinsic current, in solenoid (L), produce and the opposite pulse current of electric capacity (C2) charging direction, thus solenoid (L) in generation opposite pulsed magnetic field of direction when charging.

2, the interchange as claimed in claim 1 drive circuit of monostable impulse electromagnetic valve and electromagnetic relay, it is characterized in that: it also has the balanced loop that resistance (R1, R2), electric capacity (C2), solenoid (L) are composed in series, connect with discharge loop in this loop, its effect is when the timing of external power voltage instability, and the voltage of charging capacitor (C2) and external power voltage are consistent.