CN107785211A - A kind of A.C. contactor of intermittent power supply, which starts, remains on circuit - Google Patents
A kind of A.C. contactor of intermittent power supply, which starts, remains on circuit Download PDFInfo
- Publication number
- CN107785211A CN107785211A CN201610759636.3A CN201610759636A CN107785211A CN 107785211 A CN107785211 A CN 107785211A CN 201610759636 A CN201610759636 A CN 201610759636A CN 107785211 A CN107785211 A CN 107785211A
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- circuit
- contactor
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- voltage
- square wave
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
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- Relay Circuits (AREA)
Abstract
The A.C. contactor of intermittent power supply a kind of, which starts, remains on circuit, includes rectification circuit, high-voltage high-speed start-up circuit, rectification circuit by AC rectification into power frequency pulsating volage, and the coil power supply by high-voltage high-speed start-up circuit to A.C. contactor；It is characterized in that：Also include constant-current source circuit, square-wave generator and square wave drive circuit, positive pole power taking of the constant-current source circuit from rectification circuit DC output side, and provide operating voltage for square-wave generator and square wave drive circuit, square-wave generator is used to export high-frequency pulse square wave to square wave drive circuit, and square wave drive circuit controls metal-oxide-semiconductor in high-voltage high-speed start-up circuit to carry out intermittently conducting and cut-off with this；The present invention realizes A.C. contactor and started in high-voltage high-speed, adhesive is kept under pulsed low voltage, there is Width funtion compatibility function, for the startup optimization of traditional A.C. contactor, save electricity and reach more than 80%, can be widely used in various types of A.C. contactors.
Description
Technical field
The present invention relates to technical field of electric control, the A.C. contactor of especially a kind of intermittent power supply, which starts, keeps fortune
Row circuit.
Background technology
Currently, A.C. contactor is all directly to its coil power supply using specified alternating current, and coil flows through electric current generation
Magnetic field, make its contact closure, so as to startup optimization, with the electrical equipment of control load.However, A.C. contactor disappears in startup optimization
The electric energy of consumption is big, wastes the energy.
The content of the invention
Present invention aim to solve current A.C. contactor to use specified alternating current startup optimization, consumption be present
Electric energy greatly without save the problem of, provided for this kind of intermittent power supply A.C. contactor startup remain on circuit.
The present invention concrete scheme be：A kind of A.C. contactor of intermittent power supply, which starts, remains on circuit, includes
Rectification circuit, high-voltage high-speed start-up circuit, wherein high-voltage high-speed start-up circuit are provided with metal-oxide-semiconductor, the source electrode connection rectified current of metal-oxide-semiconductor
The negative pole of road DC output side, metal-oxide-semiconductor drain electrode as start output end connect ac contactor coil one end, coil it is another
One end connects the positive pole of rectification circuit DC output side, is gone here and there between the grid of metal-oxide-semiconductor and the positive pole of rectification circuit DC output side
Starting resistance is associated with, and protection device Z1 is parallel between the grid and source electrode of metal-oxide-semiconductor；It is characterized in that：Also include constant current
Source circuit, square-wave generator and square wave drive circuit, wherein square-wave generator contain RC delay circuits, and constant-current source circuit is from rectification
The positive pole power taking of circuit direct outlet side, and provide working power, square-wave generator for square-wave generator and square wave drive circuit
For to square wave drive circuit output frequency and the adjustable high-frequency pulse square wave of dutycycle, square wave drive circuit is according to receiving
High-frequency pulse square wave signal control metal-oxide-semiconductor intermittently turn on and end, the virtual value of the startings output end of metal-oxide-semiconductor output is electric
Pressure ensure that A.C. contactor keeps attracting state upon actuation.
In the present invention isolating diode is in series between the positive pole and constant-current source circuit of rectification circuit DC output side；
The both ends of ac contactor coil are parallel with reverse impulse and absorb protection diode.
Heretofore described rectification circuit be single-phase bridge can not control rectifying circuit, the exchange input side of rectification circuit is provided with
The electric source filter circuit being made up of common mode filtering coil and safety electric capacity.
Heretofore described square-wave generator is the frequency and the adjustable circuit of dutycycle being made up of operational amplifier, and
Contain RC delay circuits caused by control square wave delay.
Current-limiting resistance, voltage stabilizing are provided between the negative pole of heretofore described constant-current source circuit and rectification circuit DC output side
Filter circuit A and filter circuit of pressure-stabilizing B, wherein current-limiting resistance filter with voltage stabilizing again after forming series circuit with filter circuit of pressure-stabilizing A
Wave circuit B forms shunt circuit；And quick discharging circuit is additionally provided with, quick discharging circuit is used to have a power failure in A.C. contactor
When, quickly bleed off voltage remaining on electric capacity in filter circuit of pressure-stabilizing so that whole circuit is in original state, to ensure to exchange
Contactor quick startup optimization again.
Heretofore described square wave drive circuit forms emitter follower push-pull circuit by triode Q2, Q3, Q4, with driving
The conducting and cut-off of metal-oxide-semiconductor.
The present invention is simple in construction, ingenious in design, realizes A.C. contactor and starts in high-voltage high-speed, is protected under pulsed low voltage
Hold adhesive, i.e. A.C. contactor quickly repeats start and stop after high-voltage high-speed startup under the control of high-frequency direct-current pulse signal, and
Adhesive is kept during start and stop, so as to actually reduce equivalent voltage during A.C. contactor adhesive；The present invention relative to
For the startup optimization of traditional A.C. contactor, save electricity and reach more than 80%, can be widely used in various types of exchanges
Contactor.
Brief description of the drawings
Fig. 1 is the control structure block diagram of the present invention；
Fig. 2 is the electrical schematic diagram of the present invention；
Fig. 3 be A.C. contactor in high voltage startup adhesive, the starting output end of metal-oxide-semiconductor is illustrated to the voltage waveform that coil exports
Figure；
When Fig. 4 is that A.C. contactor keeps adhesive under pulsed low voltage, voltage wave that the starting output end of metal-oxide-semiconductor exports to coil
Shape schematic diagram.
In figure：1-rectification circuit, 2-high-voltage high-speed start-up circuit, 3-coil, 4-starting resistance, 5-constant-current source electricity
Road, 6-square-wave generator, 7-square wave drive circuit, 8-electric source filter circuit, 9-current-limiting resistance, 10-filter circuit of pressure-stabilizing
A, 11-quick discharging circuit, 12-filter circuit of pressure-stabilizing B.
Embodiment
Referring to Fig. 1-2, the present invention includes rectification circuit 1, high-voltage high-speed start-up circuit 2, and wherein high-voltage high-speed starts electricity
Road 2 is provided with metal-oxide-semiconductor Q1, the negative pole of the DC output side of metal-oxide-semiconductor Q1 source electrode connection rectification circuit 1, metal-oxide-semiconductor Q1 drain electrode conduct
One end of output end connection ac contactor coil 3 is started, the DC output side of the other end connection rectification circuit 1 of coil 3
Starting resistance 4, starting resistance 4 are in series between the positive pole of positive pole, metal-oxide-semiconductor Q1 grid and the DC output side of rectification circuit 1
It is made up of series resistance R1, R2, and protection device Z1 is parallel between metal-oxide-semiconductor Q1 grid and source electrode；Particularly：Also include
There are constant-current source circuit 5, square-wave generator 6 and square wave drive circuit, wherein direct current output of the constant-current source circuit 5 from rectification circuit 1
The positive pole power taking of side, and working power is provided for square-wave generator 6 and square wave drive circuit 7, square-wave generator 6 is used for square wave
The output frequency of drive circuit 7 and the adjustable high-frequency pulse square wave of dutycycle, square wave drive circuit 7 is according to the high frequency arteries and veins received
Rush square-wave signal control metal-oxide-semiconductor Q1 intermittently to turn on and end, the RMS voltage of the starting output end output of metal-oxide-semiconductor ensures
A.C. contactor keeps attracting state upon actuation.
Contain controlling party in the adjustable square-wave generator 6 of frequency and dutycycle being made up of in the present embodiment operational amplifier
The RC delay circuits of ripple, select the R11 and C6 delay time that square wave can be controlled to export.
Rectification circuit 1 described in the present embodiment be single-phase bridge can not control rectifying circuit, the exchange input side of rectification circuit 1
Provided with the electric source filter circuit 8 being made up of common mode filtering coil and safety electric capacity.
In the present embodiment, powered using constant-current source circuit 5 so that startup of the present invention remains on circuit can be real
The normal start and stop of existing 110V-380V various A.C. contactors, so as to possess Width funtion compatibility function.
Referring to Fig. 2, set between the negative pole of the DC output side of constant-current source circuit 5 described in the present embodiment and rectification circuit 1
Limited leakage resistance 9（Current-limiting resistance 9 is represented with resistance R8 in fig. 2）, filter circuit of pressure-stabilizing A10 and filter circuit of pressure-stabilizing B12, its
Middle current-limiting resistance 9 forms shunt circuit with filter circuit of pressure-stabilizing B12 again after forming series circuit with filter circuit of pressure-stabilizing A10.Surely
Press filtration wave circuit A10 is made up of protection device Z3 and electric capacity C5, and the supply voltage for square wave generator 6 carries out voltage stabilizing and filter
Ripple；Filter circuit of pressure-stabilizing B12 is made up of protection device Z2 and electric capacity C4, for the supply voltage progress to square wave drive circuit 7
Voltage stabilizing and filtering.
At the same time, quick discharging circuit 11 is additionally provided with circuit, and quick discharging circuit 11 is used in A.C. contactor
During power failure, the upper remaining voltage of electric capacity C4, C5 in filter circuit of pressure-stabilizing 10 is quickly bled off so that whole circuit is in initial shape
State, to ensure A.C. contactor quick startup optimization again.
Referring to Fig. 2, it is in series with the present embodiment between the positive pole and constant-current source circuit 5 of the DC output side of rectification circuit 1
Isolating diode D1, after preventing power failure, the DC voltage on constant-current source circuit 5 returns to high-voltage high-speed start-up circuit 2, protects
The normal operation of whole circuit is demonstrate,proved；Reverse impulse is parallel with the both ends of the coil 3 of A.C. contactor and absorbs protection diode
D3, to absorb the coil 3 of A.C. contactor caused reverse impulse high pressure after power failure, and then metal-oxide-semiconductor Q1 is protected not by anti-
Influence and damage to high voltage pulse.
The operation principle of the present invention is as follows：
Referring to Fig. 2, after A.C. contactor is powered, rectification circuit 1 by 110V-380V AC rectifications into power frequency pulsating volage, and
Powered by high-voltage high-speed start-up circuit 2 to the coil 3 of A.C. contactor, coil 3 it is electric so that A.C. contactor adhesive, now
The voltage waveform of coil 3 is as shown in figure 3, wherein in figure 3 longitudinal axis V represents coil voltage, and unit is volt, when transverse axis S is represented
Between, unit is the second, a length of T during power frequency pulsating volage a cycle0。
At the same time, the positive terminal of the DC output side of rectification circuit 1 is supplied by isolating diode D1 to constant-current source circuit 5
The constant-current source circuit 5 that the supply voltage of electricity, square-wave generator 6 and square wave drive circuit 7 is formed by module I C2 provides, and point
Voltage stabilizing, filtering are not carried out by protection device Z2, electric capacity C4 and protection device Z3, electric capacity C5, so as to which supply voltage be converted into
Smooth DC voltage.By the operational amplifier IC1 frequencies formed and the adjustable square-wave generator 6 of dutycycle and control square wave
The RC delay circuits of R11 caused by delay and C6 compositions are started working.The delay output high-frequency pulse square wave of square-wave generator 6 passes through
Square wave drive circuit 7（Emitter follower push-pull circuit is formed by triode Q2, Q3, Q4）Metal-oxide-semiconductor Q1 is driven to carry out intermittently
Conducting and cut-off, with produce maintain ac contactor coil adhesive pulse voltage, complete A.C. contactor by switch on power-
The course of work of quick startup-maintenance adhesive.During A.C. contactor maintains adhesive under pulse voltage, the electricity of coil 3
Corrugating is as shown in figure 4, wherein in Fig. 4 longitudinal axis V represents coil voltage, and unit is volt, and transverse axis S represents the time, and unit is
Second, S1 represents the power pulses of coil, and S2 represents the power pulses cycle of coil, and wherein square-wave generator 6 is included by two fortune
Module I C1 and the matched control circuit that amplifier is formed are calculated, square wave can be controlled to produce by the value for adjusting R11 and C6
Time, adjust circuit in R19, R20 resistance value, thus it is possible to vary square-wave generator 6 export high-frequency impulse dutycycle, coordinate
The electric capacity C8 frequency that pulse is exported with change is adjusted, so as to change the dutycycle of the power pulses of coil and cycle, reaches drop
Low coil keeps voltage purpose.
Can obviously it be learnt by Fig. 4, during A.C. contactor maintains adhesive under pulse voltage, A.C. contactor
The equivalent voltage when equivalent voltage of work is run much smaller than A.C. contactor with rated voltage, so as to greatly save electric energy.
It is provided with to ensure that A.C. contactor can quickly start again after power failure, in circuit and is made up of triode Q5, Q6, Q7
Quick discharging circuit 11, referring to Fig. 2；A.C. contactor at work, the power frequency pulsating volage after the rectification of rectification circuit 1
Bias current constantly is provided to triode Q5 base stage from series resistance R3, R4, so that electric capacity C7 voltage-to-grounds are always low
Level, triode Q6, Q7 cut-off；After A.C. contactor power failure, triode Q5 is to lose bias, but the residual on electric capacity C3
Voltage be to provide bias current, triode Q6, Q7 conducting, so as to by the voltage on electric capacity C4 and C5 to triode Q6, Q7 base stage
Quickly bleed off, A.C. contactor can carry out startup optimization next time.
Claims (6)
1. a kind of A.C. contactor of intermittent power supply, which starts, remains on circuit, include rectification circuit, high-voltage high-speed starts
Circuit, wherein high-voltage high-speed start-up circuit are provided with metal-oxide-semiconductor, and the source electrode of metal-oxide-semiconductor connects the negative pole of rectification circuit DC output side,
The drain electrode of metal-oxide-semiconductor is straight as the one end for starting output end connection ac contactor coil, the other end connection rectification circuit of coil
The positive pole of outlet side is flowed, is in series with starting resistance between the grid of metal-oxide-semiconductor and the positive pole of rectification circuit DC output side, and
Protection device Z1 is parallel between the grid and source electrode of metal-oxide-semiconductor；It is characterized in that：Also include constant-current source circuit, square-wave generator
With square wave drive circuit, wherein constant-current source circuit from the positive pole power taking of rectification circuit DC output side, and for square-wave generator and
Square wave drive circuit provides working power, and square-wave generator is used for adjustable to square wave drive circuit output frequency and dutycycle
High-frequency pulse square wave, square wave drive circuit according to receive high-frequency pulse square wave signal control metal-oxide-semiconductor intermittently turn on
Cut-off, the RMS voltage of the startup output end output of metal-oxide-semiconductor ensure that A.C. contactor keeps attracting state upon actuation.
2. a kind of A.C. contactor of intermittent power supply according to claim 1, which starts, remains on circuit, it is characterized in that：
Isolating diode is in series between the positive pole and constant-current source circuit of rectification circuit DC output side；In ac contactor coil
Both ends are parallel with reverse impulse and absorb protection diode.
3. a kind of A.C. contactor of intermittent power supply according to claim 1, which starts, remains on circuit, it is characterized in that：
The rectification circuit be single-phase bridge can not control rectifying circuit, the exchange input side of rectification circuit be provided with by common mode filtering coil and
The electric source filter circuit of safety electric capacity composition.
4. a kind of A.C. contactor of intermittent power supply according to claim 1, which starts, remains on circuit, it is characterized in that：
The square-wave generator is the frequency and the adjustable circuit of dutycycle being made up of operational amplifier, and contains control square wave delay
Caused RC delay circuits.
5. a kind of A.C. contactor of intermittent power supply according to claim 1, which starts, remains on circuit, it is characterized in that：
Current-limiting resistance, filter circuit of pressure-stabilizing A and voltage stabilizing are provided between the negative pole of constant-current source circuit and the rectification circuit DC output side
Filter circuit B, wherein current-limiting resistance are in parallel with filter circuit of pressure-stabilizing B compositions again after forming series circuit with filter circuit of pressure-stabilizing A
Loop；And quick discharging circuit is additionally provided with, quick discharging circuit is used for when A.C. contactor has a power failure, and quickly bleeds off voltage stabilizing filter
Voltage remaining on electric capacity in wave circuit, to ensure A.C. contactor quick startup optimization again.
6. a kind of A.C. contactor of intermittent power supply according to any one claim in claim 1 to 5 starts
Circuit is remained on, it is characterized in that：The square wave drive circuit forms emitter follower push-pull circuit by triode Q2, Q3, Q4,
To drive the conducting of metal-oxide-semiconductor and cut-off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610759636.3A CN107785211A (en) | 2016-08-30 | 2016-08-30 | A kind of A.C. contactor of intermittent power supply, which starts, remains on circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610759636.3A CN107785211A (en) | 2016-08-30 | 2016-08-30 | A kind of A.C. contactor of intermittent power supply, which starts, remains on circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107785211A true CN107785211A (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610759636.3A Pending CN107785211A (en) | 2016-08-30 | 2016-08-30 | A kind of A.C. contactor of intermittent power supply, which starts, remains on circuit |
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|---|---|
| CN (1) | CN107785211A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474571A (en) * | 2019-08-28 | 2019-11-19 | 广东华邦创科智能技术有限公司 | A kind of single phase ac phase shift starter |
| CN110970262A (en) * | 2019-12-31 | 2020-04-07 | 合肥美的智能科技有限公司 | Drive control device and method for power relay |
| CN110995048A (en) * | 2019-12-18 | 2020-04-10 | 东文高压电源（天津）股份有限公司 | Rapid high-frequency high-voltage pulse power supply circuit and implementation method |
| CN113436934A (en) * | 2021-07-01 | 2021-09-24 | 南京瑞控电气有限公司 | Control circuit and method for controlling alternating current contactor by using direct current voltage |
-
2016
- 2016-08-30 CN CN201610759636.3A patent/CN107785211A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474571A (en) * | 2019-08-28 | 2019-11-19 | 广东华邦创科智能技术有限公司 | A kind of single phase ac phase shift starter |
| CN110995048A (en) * | 2019-12-18 | 2020-04-10 | 东文高压电源（天津）股份有限公司 | Rapid high-frequency high-voltage pulse power supply circuit and implementation method |
| CN110970262A (en) * | 2019-12-31 | 2020-04-07 | 合肥美的智能科技有限公司 | Drive control device and method for power relay |
| CN113436934A (en) * | 2021-07-01 | 2021-09-24 | 南京瑞控电气有限公司 | Control circuit and method for controlling alternating current contactor by using direct current voltage |
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Application publication date: 20180309 |