CN205847074U - A kind of type photoelectric isolating A.C. contactor startup optimization holding circuit - Google Patents
A kind of type photoelectric isolating A.C. contactor startup optimization holding circuit Download PDFInfo
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- CN205847074U CN205847074U CN201620810686.5U CN201620810686U CN205847074U CN 205847074 U CN205847074 U CN 205847074U CN 201620810686 U CN201620810686 U CN 201620810686U CN 205847074 U CN205847074 U CN 205847074U
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Abstract
A kind of type photoelectric isolating A.C. contactor startup optimization holding circuit, include rectification circuit, high-voltage high-speed start-up circuit and low pressure holding circuit, high-voltage high-speed start-up circuit uses metal-oxide-semiconductor, the positive pole of rectification circuit DC output side connects the drain electrode of metal-oxide-semiconductor, and series contactor coil between negative pole and the source electrode of metal-oxide-semiconductor；Low pressure holding circuit uses direct-current switch power supply, and the input side of direct-current switch power supply is connected in parallel on the DC output side of rectification circuit, the coil of its outlet side parallel connection A.C. contactor；It is characterized in that: also include optocoupler drive circuit, optocoupler drive circuit is made up of time delay discharge circuit and photo-coupler, and the outlet side correspondence of time delay discharge circuit connects the input of photo-coupler, and the outfan correspondence of photo-coupler connects grid and the source electrode of metal-oxide-semiconductor；This utility model electric isolating effect is good, it is achieved that high-voltage high-speed starts, and keeps adhesive, the consumption of electric energy when having saved A.C. contactor startup optimization under DC low-voltage state.
Description
Technical field
This utility model relates to technical field of electric control, especially a kind of type photoelectric isolating A.C. contactor startup optimization
Holding circuit.
Background technology
Currently, A.C. contactor is all to use specified alternating current directly to its coil power supply, and coil flows through electric current and produces
Magnetic field so that it is contact closure, thus startup optimization, to control the electrical equipment of load.But, A.C. contactor disappears when startup optimization
The electric energy of consumption is big；Meanwhile, existing A.C. contactor electric isolating effect is poor, and A.C. contactor internal operation circuit is easily with outside
Interfering of the control circuit generation signal of telecommunication, thus it is unfavorable for the normal switch motion rapidly of A.C. contactor.
Summary of the invention
The purpose of this utility model seeks to solve current A.C. contactor, and there is the electric energy consumed when startup optimization big
Drawback, a kind of type photoelectric isolating A.C. contactor startup optimization holding circuit designed for this.
This utility model concrete scheme of the present utility model is: a kind of type photoelectric isolating A.C. contactor startup optimization keeps
Circuit, includes rectification circuit, high-voltage high-speed start-up circuit and low pressure holding circuit, and wherein high-voltage high-speed start-up circuit uses
Metal-oxide-semiconductor, the positive pole of rectification circuit DC output side connects the drain electrode of metal-oxide-semiconductor, and the negative pole of rectification circuit DC output side connects to be handed over
One end of stream contactor coil, the ac contactor coil other end is connected with the source electrode of metal-oxide-semiconductor；The grid of metal-oxide-semiconductor is connected to open
Galvanic electricity hinders, and is parallel with protection stabilivolt between grid and the source electrode of metal-oxide-semiconductor；Low pressure holding circuit uses direct-current switch power supply, directly
The input side of current switching power supply is connected in parallel on the DC output side of rectification circuit, the outlet side parallel contactor line of direct-current switch power supply
Circle；It is characterized in that: also include optocoupler drive circuit, optocoupler drive circuit is made up of time delay discharge circuit and photoelectrical coupler,
Wherein rectification circuit provides running voltage by mu balanced circuit for time delay discharge circuit, and mu balanced circuit is by current-limiting resistance and manostat
Being in series, the outlet side correspondence of time delay discharge circuit connects the input of photoelectrical coupler, the outfan pair of photoelectrical coupler
Grid and the source electrode of metal-oxide-semiconductor should be connected.
Time delay discharge circuit described in the utility model uses operational amplifier IC1, described manostat correspondence and operation amplifier
The positive and negative power end of device IC1 is in parallel, and current-limiting resistance, for connecting positive pole and the manostat of rectification circuit DC output side, limits
Leakage resistance is in series by resistance R1, R2, and the negative power end of operational amplifier IC1 is total to the negative pole of rectification circuit DC output side
Ground；The homophase of operational amplifier IC1 and inverting input are respectively equipped with divider resistance R12, R16 and R13, R14, wherein resistance
The two ends of R16 are parallel with electric capacity C5；The outfan of operational amplifier IC1 connects photoelectrical coupler input by resistance R11
The positive pole of light emitting diode, the minus earth of light emitting diode.Time delay discharge circuit when energising runs, through resistance R12 and
The time delay of electric capacity C5 time constant so that operational amplifier IC1 output is become high level from low level, thus drives photoelectric coupling
Device turns on, and metal-oxide-semiconductor ends, and completes A.C. contactor and is kept the work process of conversion by high-pressure motive to low pressure.
This utility model also includes quick discharging circuit, and quick discharging circuit includes audion Q3, Q4；Described low pressure
The outlet side of holding circuit is provided with two-way outlet line, and wherein a road outlet line is by commutation diode D5 and filter capacitor C11
Being in series, filter capacitor C11 is low pressure holding circuit output voltage, and another road outlet line is by commutation diode D6 and filtering
Electric capacity C7 is in series；The emitter stage of described audion Q3, Q4 is common with one end of electric capacity C5, C6 and filter capacitor C7, C11 respectively
Ground；The colelctor electrode of described audion Q3 connects the other end of electric capacity C11, and the other end of electric capacity C5 is by series diode D4
The colelctor electrode of connecting triode Q3, the colelctor electrode of the base stage connecting triode Q4 of audion Q3, and audion Q3 is by resistance R17
Bias current, the series circuit of resistance R17 and electric capacity C6 composition is provided to be in parallel with filter capacitor C7；The base stage of audion Q4 is led to
Cross the positive pole of the DC output side of series resistance R5, R6 connection rectification circuit.When A.C. contactor power-off, audion Q4 cuts
Only, filter capacitor C7 provides bias voltage for audion Q3, and the base stage that resistance R17 is audion provides bias current, to force
Audion Q3 turns on, thus is quickly bled off by remaining voltage on filter capacitor C11 and electric capacity C5, again rising for A.C. contactor
Dynamic ready.
This utility model is the uncontrollable rectification circuit of single-phase bridge, and the exchange input side of rectification circuit is provided with common mode filtering line
Circle and the electric source filter circuit of safety electric capacity composition.
The positive terminal of the direct current input side of low pressure holding circuit described in the utility model is in series with and quickly starts isolation two poles
Pipe, and it is in series with high-low pressure isolating diode at the positive terminal of its DC output side；The source electrode of metal-oxide-semiconductor is defeated with rectification circuit direct current
Go out to be parallel with between the negative pole of side reverse impulse and absorb protection diode.
This utility model simple in construction, design ingenious, electric isolating effect good, it is achieved that A.C. contactor high-voltage high-speed opens
Dynamic, and under DC low-voltage state, keep adhesive, for the startup optimization of traditional A.C. contactor, save electricity and reach
To more than 80%, and ensure that A.C. contactor is normally quickly carried out switch motion, can be widely used in running voltage 110
～various types of A.C. contactors of 380V.
Accompanying drawing explanation
Fig. 1 is control structure schematic diagram of the present utility model；
Fig. 2 is electrical schematic diagram of the present utility model.
In figure: 1 rectification circuit, 2 high-voltage high-speed start-up circuits, 3 low pressure holding circuits, 4 contactor coils,
5 optocoupler drive circuits, 5a time delay discharge circuit, 5b photoelectrical coupler, 6 quick discharging circuits, 7 power filter electricity
Road, 8 quickly start isolating diode, 9 high-low pressure isolating diodes, and 10 reverse impulses absorb protection diode.
Detailed description of the invention
Seeing Fig. 1-2, this utility model includes rectification circuit 1, high-voltage high-speed start-up circuit 2 and low pressure holding circuit 3,
Wherein high-voltage high-speed start-up circuit 2 uses metal-oxide-semiconductor Q1, and the positive pole of the DC output side of rectification circuit 1 connects the leakage of metal-oxide-semiconductor Q1
Pole, the negative pole of the DC output side of rectification circuit 1 connects ac contactor coil one end, the ac contactor coil other end with
The source electrode of metal-oxide-semiconductor is connected；The grid of metal-oxide-semiconductor Q1 is connected to start between grid and the source electrode of resistance R3 and R4, metal-oxide-semiconductor Q1 in parallel
Protected stabilivolt Z1；Low pressure holding circuit uses direct-current switch power supply, and the input side of direct-current switch power supply is connected in parallel on rectified current
The DC output side on road 1, the outlet side parallel contactor coil 4 of direct-current switch power supply；Particularly: also include optocoupler and drive electricity
Road 5, optocoupler drive circuit 5 is made up of time delay discharge circuit 5a and photoelectrical coupler 5b, and wherein rectification circuit passes through mu balanced circuit
Thering is provided running voltage for time delay discharge circuit, mu balanced circuit is in series by series resistance R1, R2 and manostat IC2, Qi Zhongwen
Depressor IC2 is in parallel with electric capacity C4, and the outlet side correspondence of time delay discharge circuit connects the input of photoelectrical coupler U1, light thermocouple
The outfan correspondence of clutch 5b (representing with U1 in fig. 2) connects grid and the source electrode of metal-oxide-semiconductor Q1, to control the cut-off of M0S pipe.
Seeing Fig. 2, the 5a of time delay discharge circuit described in the present embodiment uses operational amplifier IC1, operational amplifier IC1
The shunt regulating circuit formed by current-limiting resistance R1, R2 and IC2 and electric capacity C4 from the DC output side of rectification circuit just
Pole power taking, altogether, the homophase of IC1 and inverting input are respectively equipped with point the negative pole of negative power end and rectification circuit DC output side
Piezoresistance R12, R16 and R13, R14, wherein the two ends of resistance R16 are parallel with electric capacity C5；Time delay discharge circuit 5a runs in energising
Time, through resistance R12 and the time delay of electric capacity C5 time constant so that operational amplifier IC1 output is become high level from low level,
Thus driving photoelectrical coupler 5b to turn on, metal-oxide-semiconductor ends, and completes A.C. contactor and is kept the work of conversion by high-pressure motive to low pressure
Make process.
See Fig. 2, the present embodiment also include quick discharging circuit 6, quick discharging circuit 6 include audion Q3,
Q4；The outlet side of described low pressure holding circuit is provided with two-way outlet line, and wherein a road is that A.C. contactor low pressure keeps voltage
Output, be made up of commutation diode D5 and filter capacitor C11, by high-low pressure isolating diode 9 (representing with D3 in fig. 2) to
Contactor coil 4 provides and keeps voltage, and another road provides bias supply for audion Q3, the Q4 in quick discharging circuit 6, by whole
Stream diode D6 and filter capacitor C7 composition, and after system cut-off, provide biased electrical to audion Q3 base stage by resistance R17
Stream (audion Q4 base stage is ended owing to not having bias current), forces audion Q3 conducting, thus quickly by filter capacitor C11
Bleeding off with remaining voltage on electric capacity C5, the starting again for A.C. contactor is ready.
Rectification circuit 1 described in the present embodiment is the uncontrollable rectification circuit of single-phase bridge, the exchange input side of rectification circuit 1
It is provided with common mode filtering coil and the electric source filter circuit 7 of safety electric capacity composition.
The positive terminal of the direct current input side of low pressure holding circuit described in the present embodiment 3 is in series with and quickly starts isolation two poles
Pipe 8 (representing with D1 in fig. 2), after preventing A.C. contactor from having a power failure, electric capacity C9 and electric capacity C10 in low pressure holding circuit 3
On voltage return in the current supply circuit being fed to metal-oxide-semiconductor Q1, affect the rapid starting/stopping of A.C. contactor.In low pressure holding circuit 3
The positive terminal of DC output side is in series with high-low pressure isolating diode 9, low for preventing the high pressure in fast start circuit from scurrying into
Pressure holding circuit, it is therefore prevented that components and parts corresponding in low pressure holding circuit are caused damage by high pressure；At contactor coil two end also
It is associated with reverse impulse and absorbs protection diode 10 (representing with D2 in fig. 2), to prevent from producing at contactor coil shutdown transient
The damage that M0S pipe Q1 is caused of reverse impulse voltage.
Operation principle of the present utility model is as follows:
(1) external 110～380V alternating current (depending on contactor coil rated voltage) circuit 7 Filtering Processing after filtering
After, rectification circuit 1 this alternating current being converted to Rectified alternating current, pulsating direct current supplies electricity to metal-oxide-semiconductor Q1 and powers, switch on power
Moment, resistance R3, R4 provide bias voltage to metal-oxide-semiconductor Q1, make metal-oxide-semiconductor Q1 turn on, and the coil of A.C. contactor 4 obtains electric Guan Bi；
(2), while metal-oxide-semiconductor Q1 conducting, time delay discharge circuit 5a starts, the operational amplifier in time delay discharge circuit 5a
IC1 is through capacitance-resistance time delay, when the level of the in-phase input end of operational amplifier IC1 is higher than the level of its inverting input, fortune
Calculate amplifier IC1 and export high level, drive the outfan conducting of photoelectrical coupler U1, thus force grid and the source of metal-oxide-semiconductor Q1
Extremely short connecing, metal-oxide-semiconductor Q1 ends；
(3) Rectified alternating current is through quickly starting isolating diode D1 to straight to low pressure holding circuit 3(with electric capacity C9, C10
Current switching power supply) power supply, direct-current switch power supply output DC low-voltage metal-oxide-semiconductor Q1 turn off after to the coil 4 of A.C. contactor
Thering is provided and maintain voltage, direct-current switch power supply uses external high-pressure MOS chip, at wide-voltage range is just adapting to direct-current switch power supply
Often work；
(4) quick discharging circuit 6 works as follows: when A.C. contactor is properly functioning, the direct current of rectification circuit 1 output
Pulsating volage is powered to the base stage of audion Q4 by series resistance R5, R6, and audion Q4 turns on, and makes the voltage at electric capacity C6 two ends
Being close to zero, audion Q3 ends；After external power is stopped power supply, audion Q4 ends immediately, and resistance R17 is stored up by electric capacity C7
The voltage deposited provides bias current, audion Q3 fast conducting, thus by the output of direct-current switch power supply to audion Q3 base stage
Voltage on end filter capacitor C11 and the voltage on the in-phase input end electric capacity C5 of operational amplifier IC1 quickly bleed off, to ensure
A.C. contactor quickly discharges and quick startup optimization.
Claims (5)
1. a type photoelectric isolating A.C. contactor startup optimization holding circuit, includes rectification circuit, high-voltage high-speed startup electricity
Road and low pressure holding circuit, wherein high-voltage high-speed start-up circuit uses metal-oxide-semiconductor, and the positive pole of rectification circuit DC output side connects
The drain electrode of metal-oxide-semiconductor, the negative pole of rectification circuit DC output side connects one end of ac contactor coil, and ac contactor coil is another
One end is connected with the source electrode of metal-oxide-semiconductor；The grid of metal-oxide-semiconductor is connected to start resistance, is parallel with guarantor between grid and the source electrode of metal-oxide-semiconductor
Protect stabilivolt；Low pressure holding circuit uses direct-current switch power supply, and the input side of direct-current switch power supply is connected in parallel on the straight of rectification circuit
Stream outlet side, the outlet side parallel contactor coil of direct-current switch power supply；It is characterized in that: also include optocoupler drive circuit, light
Coupling drive circuit is made up of time delay discharge circuit and photoelectrical coupler, and wherein rectification circuit is time delay amplifier electricity by mu balanced circuit
Road provides running voltage, and mu balanced circuit is in series by current-limiting resistance and manostat, and the outlet side correspondence of time delay discharge circuit is even
Connecing the input of photoelectrical coupler, the outfan correspondence of photoelectrical coupler connects grid and the source electrode of metal-oxide-semiconductor.
A kind of type photoelectric isolating A.C. contactor startup optimization holding circuit the most according to claim 1, is characterized in that: institute
State time delay discharge circuit and use operational amplifier IC1, the corresponding positive and negative power end phase with operational amplifier IC1 of described manostat
Parallel connection, current-limiting resistance is for connecting positive pole and the manostat of rectification circuit DC output side, and current-limiting resistance is connected by resistance R1, R2
Forming, the negative pole of the negative power end of operational amplifier IC1 and rectification circuit DC output side is altogether；Operational amplifier IC1's is same
Being respectively equipped with divider resistance R12, R16 and R13, R14 with inverting input mutually, wherein the two ends of resistance R16 are parallel with electric capacity C5；
The outfan of operational amplifier IC1 connects the positive pole of the light emitting diode of photoelectrical coupler input, luminescence two by resistance R11
The minus earth of pole pipe.
A kind of type photoelectric isolating A.C. contactor startup optimization holding circuit the most according to claim 2, is characterized in that: also
Including quick discharging circuit, quick discharging circuit includes audion Q3, Q4；The outlet side of described low pressure holding circuit is provided with
Two-way outlet line, wherein a road outlet line is in series by commutation diode D5 and filter capacitor C11, filter capacitor C11
For low pressure holding circuit output voltage, another road outlet line is in series by commutation diode D6 and filter capacitor C7；Described
The emitter stage of audion Q3, Q4 is respectively with one end of electric capacity C5, C6 and filter capacitor C7, C11 altogether；The collection of described audion Q3
Electrode connects the other end of electric capacity C11, and the current collection that the other end of electric capacity C5 is by series diode D4 connecting triode Q3
Pole, the colelctor electrode of the base stage connecting triode Q4 of audion Q3, and audion Q3 are provided bias current, resistance by resistance R17
The series circuit of R17 and electric capacity C6 composition is in parallel with filter capacitor C7；The base stage of audion Q4 is by series resistance R5, R6 even
Connect the positive pole of the DC output side of rectification circuit.
A kind of type photoelectric isolating A.C. contactor startup optimization holding circuit the most according to claim 1, is characterized in that: institute
Stating rectification circuit is the uncontrollable rectification circuit of single-phase bridge, and the exchange input side of rectification circuit is provided with by common mode filtering coil and peace
The electric source filter circuit of rule electric capacity composition.
5. according to a kind of type photoelectric isolating A.C. contactor startup optimization described in Claims 1-4 any one claim
Holding circuit, is characterized in that: the positive terminal of the direct current input side of described low pressure holding circuit is in series with and quickly starts isolation two poles
Pipe, and it is in series with high-low pressure isolating diode at the positive terminal of its DC output side；The source electrode of metal-oxide-semiconductor is defeated with rectification circuit direct current
Go out to be parallel with between the negative pole of side reverse impulse and absorb protection diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620810686.5U CN205847074U (en) | 2016-07-29 | 2016-07-29 | A kind of type photoelectric isolating A.C. contactor startup optimization holding circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620810686.5U CN205847074U (en) | 2016-07-29 | 2016-07-29 | A kind of type photoelectric isolating A.C. contactor startup optimization holding circuit |
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| Publication Number | Publication Date |
|---|---|
| CN205847074U true CN205847074U (en) | 2016-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620810686.5U Active CN205847074U (en) | 2016-07-29 | 2016-07-29 | A kind of type photoelectric isolating A.C. contactor startup optimization holding circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800286A (en) * | 2017-08-30 | 2018-03-13 | 全球能源互联网研究院有限公司 | The start-up circuit and its method of work of a kind of draw-out power supply |
-
2016
- 2016-07-29 CN CN201620810686.5U patent/CN205847074U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800286A (en) * | 2017-08-30 | 2018-03-13 | 全球能源互联网研究院有限公司 | The start-up circuit and its method of work of a kind of draw-out power supply |
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