CN2302612Y

CN2302612Y - Timing closing controller

Info

Publication number: CN2302612Y
Application number: CN 97210126
Authority: CN
Inventors: 黄志能
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-14
Filing date: 1997-04-14
Publication date: 1998-12-30
Anticipated expiration: 2007-04-14

Abstract

The utility model provides a time delay closing controller which comprises a base, a display panel, a rectification circuit, a timing starting circuit, an exciting circuit, an overcurrent detecting circuit, etc. The controller can carry out linear selection for delay time through adjusting a knob on the display panel. When the current of a contactor coil is increased caused by the fluctuation of a loading short circuit or network voltage, a circuit is automatically switched off. Thereby, the utility model can perform the protection action for the circuit and the loading coil. No matter the controller is in a switch-off state, an overcurrent state or a switch-on state, the states can be intuitively observed from the display panel. As long as the controller is connected in series to a circuit which needs time delay closure through a wire connecting screw bolt when the utility model is used. Therefore, the utility model is convenient.

Description

The timing closing controller

The utility model provides a kind of timing closing controller, particularly a kind of semiconductor switch device with timing closing function.

In the control procedure of lathe, milling machine etc.,, all be to adopt coil Attraction strap moving contact output delay function basically if need to use electric elements with timing closing function.As by " eelctrical engineering handbook " the 7-35 page or leaf of the 17th printing in Shanghai science tech publishing house 93 year June and the Y of the described X53T vertical knee-type milling machine of 7-47 page or leaf spindle drive motor---△ starting, running, the main shaft speed change operation of T65 horizontal boring machine etc. all are to adopt the method.Because the adhesive of coil is to be cost with the consumed power, thereby uses coil in a large number, will have a negative impact to improving grid power, and the self-induced e.m.f that produces during coil losing electricity also produces power supply and pollutes.Take place for fear of above-mentioned situation; developed two-wire electronic type time delay closing relay afterwards; this kind relay has energy-saving advantages; and can not produce and pollute power supply; but because this kind relay is by the aerial lug adjusting of delaying time, thereby can not carry out linear regulation, and under the situation of load short circuits or voltage ripple of power network; regular meeting causes coil burnout, thereby above two kinds of timing closing contacts all do not possess excess current protective function.

The purpose of this utility model is to provide a kind of timing closing controller; the delay time of this kind controller can carry out linear regulation; and have an excess current protective function, do not pollute power supply to reach, time-delay is easy to adjust, effectively the purpose of protective circuit and loading coil.

Solution of the present utility model is that controller comprises rectification circuit, pedestal, display floater etc., it is characterized in that also comprising the start-up circuit that clocks, exciting circuit and overcurrent sensing circuit, and the start-up circuit that clocks is by adjustable resistance R ₆, capacitor C ₅, bidirectional trigger diode D ₇, control initial start electric current controllable silicon K ₁, have a controllable silicon K of overcurrent protection effect ₂And triode V ₁Deng composition, exciting circuit is by voltage-stabiliser tube D ₈, triode V ₂, oscillation transformer B ₁And rectifier diode D ₄Deng composition, overcurrent sensing circuit by the photoelectrical coupler GD that detects the main line current value, accept the controllable silicon K of photoelectrical coupler GD overcurrent signal ₃, sampling resistor R ₈, output overcurrent signal pulse transformer B ₃And rectifier diode D ₁Deng composition, pedestal is provided with fixing hole and connection bolt, and display floater is provided with time-delay adjusting knob and indicator light LED ₁, LED ₂And LED ₃

Pulse transformer B in the above-mentioned timing closing controller overcurrent sensing circuit ₃Secondary be parallel with diode D ₂, with the short circuit negative pulse.

The clock Q of start-up circuit of above-mentioned timing closing controller ₁End and current-limiting resistance R ₁Between be in series with pulse transformer B ₂Former limit, transformer B ₂Secondary be associated with rectifier diode D ₅, triode V ₃Deng, and triode V ₃With capacitor C ₅Parallel connection so that cause under the uncompleted situation of time-delay in power failure suddenly, makes capacitor C ₅Discharge, thereby the reliability of assurance time-delay.

Be parallel with piezo-resistance U in the above-mentioned timing closing controller rectification circuit, the overvoltage that produces during in order to elimination emotion load dead electricity.

Advantage of the present utility model is to be provided with circuit overcurrent protection; when load short circuits or voltage ripple of power network cause the increase of contactor coil electric current; circuit automatically shuts down; exciting circuit will stop excitation; thereby played the effect of protective circuit and loading coil, guaranteed also that simultaneously contactor coil works under the normal electrical flow valuve.The designed delay time of this controller can carry out linear regulation, then can select easily by knob as required, and is simple to operate.And circuit can both be seen from display floater intuitively no matter be to be in disconnection, overcurrent or conducting state.During use, only need be serially connected in this controller in the circuit that needs timing closing and get final product, and are very convenient.

Accompanying drawing 1 is the utility model circuit block diagram.

Accompanying drawing 2 is the utility model circuit theory diagrams.

Accompanying drawing 3 is the utility model structural representations.

Accompanying drawing 4 is end views of Fig. 3.

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

With the maximum delay time is that 120 seconds controller is an example:

The adjustable resistance R of start-up circuit clocks ₆Resistance is 240K, capacitor C ₅Be 220 μ f/50V bidirectional trigger diode D ₇Trigger voltage VS＞26V, the maximum permissible current of this controller is 300mA, the sampling resistor R in the overcurrent sensing circuit ₈Resistance is 2.3 Ω, and the transfer ratio of photoelectrical coupler GD 10C is 1: 0.6.Adjusting knob 3 places on the display floater are provided with 12 graduation marks, and every graduation mark increases progressively with time-delay in 10 seconds, as knob 3 tuning centre positions, promptly adjustable resistance R ₆Resistance is 120K, and delay time then is 60 seconds.Indicator light on the panel is a LED ₁, LED ₂And LED ₃, represent off-state, over-current state and conducting state respectively.

Power supply is through loading coil KM, from Z ₁, Z ₂End points enters rectification circuit, be rectified into direct current after, divide the output of starting current and main line electric current.Starting current is through pulse transformer B ₂Primary coil, resistance is the current-limiting resistance R of 60K ₁, voltage stabilizing didoe W ₂And adjustable resistance R ₆To capacitor C ₅Charging.Between charge period, because triode V ₁No base promoter electric current, circuit is in off-state, simultaneously, through current-limiting resistance R ₁Electric current again by diode D ₃, LED ₁And voltage-stabiliser tube W ₁Get back to negative pole and form the loop, at this moment LED ₁Bright.

After charging after a while, work as capacitor C ₅On voltage rise to bidirectional trigger diode D ₇Trigger voltage the time, D ₇Conducting rapidly is to controllable silicon K ₁Control board discharge, make K ₁Conducting, and be triode V ₁The base promoter electric current of about 4mA is provided, makes V ₁Conducting, simultaneously, the main line electric current is from Z ₃End points flows out, through g ₁End points, sampling resistor R ₈And g ₂End points enters j ₁End points is through voltage-stabiliser tube D ₈And j ₂End points enters triode V ₁Collector electrode end points Q ₅, again through V ₁From Q ₆End points flows out, and gets back to Z ₄End points forms the loop, and loading coil KM two ends obtain whole input voltages and adhesive.At this moment, Q ₁The voltage drop of end points is about 0V, the loop when no current is flowed through charging, thereby LED ₁Extinguish.And after producing the main line electric current, exciting circuit work, oscillation transformer B ₁The induced potential that secondary produces is through diode D ₄LED is passed through in rectification ₃, from j ₄End points flows out, and enters Q ₄End points continues as triode V ₁Provide starting current, to guarantee V ₁Continue conducting.Because have electric current to flow through this moment, so LED ₃Bright, indication circuit is in conducting state.

Because the maximum permissible current of this controller is 300mA, when electric current reaches 300mA, resistance R ₈On pressure drop be about 0.7V, the diode section in this moment photoelectrical coupler GD begins to produce atomic weak electric current.When electric current surpasses 300mA, as when reaching 400mA, sampling resistor R ₈The pressure drop at two ends is about 0.9V, and the diode section of photoelectrical coupler GD is from flowing through resistance R at this moment ₈On electric current in a shunting part, shunt current is greater than 8mA.Because the transfer ratio of photoelectrical coupler is 1: 0.6, so produce electric current greater than 4mA by controllable silicon K in the triode portion of photoelectrical coupler ₃Control board constitute the loop, trigger controllable silicon K ₃Conducting.At controllable silicon K ₃The moment of conducting, the electric current that has moment the to increase pulse transformer B that flows through ₃Primary coil, B ₃Secondary coil produce induced potential simultaneously, through diode D ₁Rectification, as overcurrent signal from g ₅End points flows out, from Q ₂End points enters the start-up circuit that clocks, and triggers controllable silicon K ₂Conducting also keeps conducting, and through diode D ₆Short circuit from exciting circuit to triode V ₁The starting current of carrying makes triode V ₁Lose starting current, circuit is off-state, and exciting circuit stops excitation, pulse power transformation device B ₁The output of secondary no current, LED ₃Go out.Triode V ₁After being in cut-off state, electric current is through pulse transformer B ₂, resistance R ₁, diode D ₃, LED ₂, the controllable silicon K of conducting ₂Form the loop, at this moment LED ₂Bright, indication circuit is in the overcurrent trip status circuit and turn-offs, thereby has played the effect of protective circuit and loading coil KM.

During use, which bar circuit needs timing closing, only need controller be serially connected in this circuit by connection bolt 3 to get final product, and by the fixing hole on the pedestal controller be fixed.Select required delay time by adjusting knob 2, which kind of state circuit is in, and all can show intuitively by the indicator light on the display floater, uses very convenient.

Claims

1, a kind of timing closing controller comprises rectification circuit, pedestal, display floater etc., it is characterized in that also comprising the start-up circuit that clocks, exciting circuit and overcurrent sensing circuit, and the start-up circuit that clocks is by adjustable resistance R ₆, capacitor C ₅, bidirectional trigger diode D ₇, control initial start electric current controllable silicon K ₁, have a controllable silicon K of overcurrent protection effect ₂And triode V ₁Deng composition, exciting circuit is by voltage-stabiliser tube D ₈, triode V ₂, oscillation transformer B ₁And rectifier diode D ₄Deng composition, overcurrent sensing circuit by the photoelectrical coupler GD that detects the main line current value, accept the controllable silicon K of photoelectrical coupler GD overcurrent signal ₃, sampling resistor R ₈, output overcurrent signal pulse transformer B ₃And rectifier diode D ₁Deng composition, pedestal is provided with fixing hole and connection bolt, and display floater is provided with time-delay adjusting knob and indicator light LED ₁, LED ₂And LED ₃

2,, it is characterized in that the pulse transformer B of described overcurrent sensing circuit by the described controller of claim 1 ₃Secondary be parallel with diode D ₂, with the short circuit negative pulse.

3,, it is characterized in that the Q of the described start-up circuit that clocks by the described controller of claim 1 ₁End and current-limiting resistance R ₁Between be in series with pulse transformer B ₂Former limit, transformer B ₂Secondary be associated with rectifier diode D ₅, triode V ₃Deng, and triode V ₃With capacitor C ₅Parallel connection is to guarantee the reliability of time-delay.

4, by the described controller of claim 1, it is characterized in that being parallel with in the described rectification circuit piezo-resistance U, the overvoltage that produces during with elimination emotion load dead electricity.