CN205992505U - A kind of A.C. contactor startup of intermittent power supply remains on circuit - Google Patents
A kind of A.C. contactor startup of intermittent power supply remains on circuit Download PDFInfo
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- CN205992505U CN205992505U CN201620981065.3U CN201620981065U CN205992505U CN 205992505 U CN205992505 U CN 205992505U CN 201620981065 U CN201620981065 U CN 201620981065U CN 205992505 U CN205992505 U CN 205992505U
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- 239000004065 semiconductor Substances 0.000 claims abstract description 28
- 238000005457 optimization Methods 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 230000000740 bleeding effect Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 11
- 239000000853 adhesive Substances 0.000 abstract description 10
- 230000001070 adhesive effect Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
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Abstract
A kind of A.C. contactor startup of intermittent power supply remains on circuit, includes rectification circuit, high-voltage high-speed start-up circuit, AC rectification is become power frequency pulsating volage by rectification circuit, and passes through the coil power supply to A.C. contactor for the high-voltage high-speed start-up circuit；It is characterized in that：Also include constant-current source circuit, square-wave generator and square wave drive circuit, constant-current source circuit is from the positive pole power taking of rectification circuit DC output side, and be square-wave generator and square wave drive circuit offer running voltage, square-wave generator is used for square wave drive circuit output high-frequency pulse square wave, and square wave drive circuit controls metal-oxide-semiconductor in high-voltage high-speed start-up circuit intermittently to be turned on this and ends；This utility model achieves A.C. contactor and starts in high-voltage high-speed, keep adhesive 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
This utility model is related to technical field of electric control, and the A.C. contactor of especially a kind of intermittent power supply starts to be protected
Hold operation 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 and produces
Magnetic field is so as to contact closure, thus startup optimization, to control the electrical equipment of load.However, A.C. contactor disappears in startup optimization
The electric energy of consumption is big, wastes the energy.
Content of the invention
The purpose of this utility model seeks to solve current A.C. contactor using specified alternating current startup optimization, exists
The problem of the electric energy greatly and not energy-conservation consuming, provides a kind of A.C. contactor startup of intermittent power supply to remain on electricity for this
Road.
Concrete scheme of the present utility model is：A kind of A.C. contactor startup of intermittent power supply remains on circuit, bag
Rectification circuit, high-voltage high-speed start-up circuit are included, wherein high-voltage high-speed start-up circuit is provided with metal-oxide-semiconductor, and the source electrode connection of metal-oxide-semiconductor is whole
The negative pole of current circuit DC output side, the drain electrode of metal-oxide-semiconductor is as the one end starting outfan connection ac contactor coil, coil
The other end connect the positive pole of rectification circuit DC output side, the positive pole of the grid of metal-oxide-semiconductor and rectification circuit DC output side it
Between be in series with and be parallel with protection device Z1 between starting resistance, and the grid in metal-oxide-semiconductor and source electrode；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 circuit, constant-current source circuit from
The positive pole power taking of rectification circuit DC output side, and be square-wave generator and square wave drive circuit offer working power, square wave is sent out
Raw device is used for square wave drive circuit output frequency and the adjustable high-frequency pulse square wave of dutycycle, and square wave drive circuit is according to connecing
The high-frequency pulse square wave signal that receives controls metal-oxide-semiconductor intermittently to turn on and end, metal-oxide-semiconductor start that outfan exports effective
Threshold voltage ensure that A.C. contactor keeps attracting state upon actuation.
It is in series with isolation two poles between the positive pole and constant-current source circuit of rectification circuit DC output side in this utility model
Pipe；It is parallel with reverse impulse at the two ends of ac contactor coil and absorb protection diode.
Rectification circuit described in this utility model for single-phase bridge can not control rectifying circuit, the exchange input side of rectification circuit
It is provided with the electric source filter circuit being made up of common mode filtering coil and safety electric capacity.
Square-wave generator described in this utility model is the frequency being made up of operational amplifier and the adjustable electricity of dutycycle
Road, and containing the RC delay circuit controlling square wave time delay to produce.
Be provided between the negative pole of constant-current source circuit described in this utility model and rectification circuit DC output side current-limiting resistance,
Filter circuit of pressure-stabilizing A and filter circuit of pressure-stabilizing B, wherein current-limiting resistance and filter circuit of pressure-stabilizing A constitute after series circuit again with surely
Filter pressing wave circuit B constitutes shunt circuit；And it is additionally provided with quick discharging circuit, quick discharging circuit is used for stopping in A.C. contactor
When electric, quickly bleed off remaining voltage on electric capacity in filter circuit of pressure-stabilizing so that whole circuit is in original state, to guarantee to hand over
Stream catalyst quick startup optimization again.
Square wave drive circuit described in this utility model forms emitter follower push-pull circuit by audion Q2, Q3, Q4, with
Drive conducting and the cut-off of metal-oxide-semiconductor.
This utility model structure is simple, design is ingenious it is achieved that A.C. contactor starts in high-voltage high-speed, in pulsed low voltage
Lower holding adhesive, that is, A.C. contactor high-voltage high-speed startup after, quickly repeat to open under the control of high-frequency direct-current pulse signal
Stop, and keep adhesive during start and stop, thus the actual equivalent voltage reducing during A.C. contactor adhesive；This practicality is new
Type, for the startup optimization of traditional A.C. contactor, is saved electricity and is reached more than 80%, can be widely used in various types of
The A.C. contactor of type.
Brief description
Fig. 1 is control structure block diagram of the present utility model；
Fig. 2 is electrical schematic diagram of the present utility model；
Fig. 3 be A.C. contactor in high voltage startup adhesive, metal-oxide-semiconductor start the voltage waveform that exports to coil of outfan
Schematic diagram；
When Fig. 4 is that A.C. contactor keeps adhesive under pulsed low voltage, metal-oxide-semiconductor start the electricity that exports to coil of outfan
Corrugating schematic diagram.
In figure：1 rectification circuit, 2 high-voltage high-speed start-up circuits, 3 coils, 4 starting resistances, 5 constant-current source electricity
Road, 6 square-wave generators, 7 square wave drive circuit, 8 electric source filter circuits, 9 current-limiting resistances, 10 filter circuit of pressure-stabilizing
A, 11 quick discharging circuits, 12 filter circuit of pressure-stabilizing B.
Specific embodiment
Referring to Fig. 1-2, this utility model includes rectification circuit 1, high-voltage high-speed start-up circuit 2, and wherein high-voltage high-speed opens
Galvanic electricity road 2 is provided with metal-oxide-semiconductor Q1, and the source electrode of metal-oxide-semiconductor Q1 connects the negative pole of the DC output side of rectification circuit 1, the drain electrode of metal-oxide-semiconductor Q1
As the one end starting outfan connection ac contactor coil 3, the other end of coil 3 connects the direct current output of rectification circuit 1
The positive pole of side, is in series with starting resistance 4 between the positive pole of the DC output side of the grid of metal-oxide-semiconductor Q1 and rectification circuit 1, play galvanic electricity
Resistance 4 is made up of series resistance R1, R2, and is parallel with protection device Z1 between the grid in metal-oxide-semiconductor Q1 and source electrode；Particularly：Also
Include constant-current source circuit 5, square-wave generator 6 and square wave drive circuit, wherein constant-current source circuit 5 is from the direct current of rectification circuit 1
The positive pole power taking of outlet side, and be that square-wave generator 6 and square wave drive circuit 7 provide working power, square-wave generator 6 be used for
Square wave drive circuit 7 output frequency and the adjustable high-frequency pulse square wave of dutycycle, square wave drive circuit 7 is according to the height receiving
Frequency pulse square wave signal controls metal-oxide-semiconductor Q1 intermittently to turn on and end, the RMS voltage starting outfan output of metal-oxide-semiconductor
Ensure that A.C. contactor keeps attracting state upon actuation.
Controlling party is contained in the frequency being made up of operational amplifier in the present embodiment and the adjustable square-wave generator of dutycycle 6
The RC delay circuit of ripple, selects the delay time that can control square wave output of R11 and C6.
Rectification circuit 1 described in the present embodiment for single-phase bridge can not control rectifying circuit, the exchange input side of rectification circuit 1
It is 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 described in the utility model remains on circuit energy
Enough realize the normal start and stop of the various A.C. contactors of 110V-380V, thus possessing 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 and filter circuit of pressure-stabilizing A10 constitute and constitute shunt circuit with filter circuit of pressure-stabilizing B12 again after series circuit.Surely
Filter pressing 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 carrying out to the supply voltage of square wave drive circuit 7
Voltage stabilizing and filtering.
Meanwhile, it is additionally provided with quick discharging circuit 11 in circuit, quick discharging circuit 11 is used in A.C. contactor
During power failure, quickly bleed off the upper remaining voltage of electric capacity C4, C5 in filter circuit of pressure-stabilizing 10 so that whole circuit is in initial shape
State, to guarantee A.C. contactor quick startup optimization again.
Referring to Fig. 2, it is in series between the positive pole and constant-current source circuit 5 of rectification circuit 1 DC output side in the present embodiment
Isolating diode D1, after preventing from having a power failure, the DC voltage on constant-current source circuit 5 returns to high-voltage high-speed start-up circuit 2, protects
Demonstrate,prove the normal operation of whole circuit；It is parallel with reverse impulse at the two ends of the coil 3 of A.C. contactor and absorb protection diode
D3, the reverse impulse high pressure that the coil 3 in order to absorb A.C. contactor produces after power failure, and then protect metal-oxide-semiconductor Q1 not to be subject to instead
Damage to high voltage pulse impact.
Operation principle of the present utility model is as follows：
Referring to Fig. 2, after A.C. contactor energising, 110V-380V AC rectification is become power frequency pulsation electricity by rectification circuit 1
Pressure, and powered to the coil 3 of A.C. contactor by high-voltage high-speed start-up circuit 2, coil 3 obtains electric so that A.C. contactor is inhaled
Close, now as shown in figure 3, wherein longitudinal axis V represents coil voltage in figure 3, unit is volt to the voltage waveform of coil 3, transverse axis S
Express time, unit is the second, a length of T during power frequency pulsating volage a cycle0.
Meanwhile, the positive terminal of rectification circuit 1 DC output side is supplied to constant-current source circuit 5 by isolating diode D1
Electricity, the supply voltage of square-wave generator 6 and square wave drive circuit 7 is provided by the constant-current source circuit 5 that module I C2 is constituted, and point
Voltage stabilizing, filtering are not carried out by protection device Z2, electric capacity C4 and protection device Z3, electric capacity C5, thus supply voltage is converted into
Smooth DC voltage.The frequency being made up of operational amplifier IC1 and the adjustable square-wave generator of dutycycle 6 and control square wave
The RC delay circuit of the R11 and C6 composition that time delay produces is started working.Square-wave generator 6 time delay output high-frequency pulse square wave passes through
Square wave drive circuit 7（Emitter follower push-pull circuit is formed by audion Q2, Q3, Q4）Metal-oxide-semiconductor Q1 is driven to carry out intermittently
Conducting and cut-off, to produce the pulse voltage maintaining ac contactor coil adhesive, complete A.C. contactor by switching on power-
The quick work process starting-maintain adhesive.During A.C. contactor maintains adhesive under pulse voltage, the electricity of coil 3
As shown in figure 4, wherein longitudinal axis V represents coil voltage in the diagram, unit is volt to corrugating, transverse axis S express 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 includes being transported by two
Calculate module I C1 and the matched control circuit that amplifier is constituted, square wave can be controlled to produce by the value 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, cooperation
The frequency with change output pulse of adjustment electric capacity C8, thus changing dutycycle and the cycle of the power pulses of coil, reaches fall
Low coil keeps voltage purpose.
Can obviously 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 with rated voltage much smaller than A.C. contactor, thus greatly save electric energy.
Can quickly start again after power failure for guarantee A.C. contactor, be provided with circuit and be made up of audion Q5, Q6, Q7
Quick discharging circuit 11, referring to Fig. 2；A.C. contactor operationally, power frequency pulsating volage after rectification circuit 1 rectification
Constantly provide bias current from series resistance R3, R4 to the base stage of audion Q5, so that electric capacity C7 voltage-to-ground is always low
Level, audion Q6, Q7 end；After A.C. contactor has a power failure, audion Q5 loses bias, but the residual on electric capacity C3
Voltage provide bias current to the base stage of audion Q6, Q7, audion Q6, Q7 turn on, thus by the voltage on electric capacity C4 and C5
Quickly bleed off, A.C. contactor can carry out startup optimization next time.
Claims (6)
1. a kind of A.C. contactor startup of intermittent power supply remains on circuit, includes 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 connects one end of ac contactor coil as starting outfan, and the other end connection rectification circuit of coil is straight
The positive pole of stream outlet side, is in series with starting resistance between the positive pole of the grid of metal-oxide-semiconductor and rectification circuit DC output side, and
It is parallel with protection device Z1 between the grid of metal-oxide-semiconductor and source electrode；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 the high-frequency pulse square wave signal that receives control metal-oxide-semiconductor intermittently turn on
Cut-off, the RMS voltage starting outfan output of metal-oxide-semiconductor ensure that A.C. contactor keeps attracting state upon actuation.
2. a kind of A.C. contactor startup of intermittent power supply according to claim 1 remains on circuit, it is characterized in that：
It is in series with isolating diode between the positive pole and constant-current source circuit of rectification circuit DC output side；In ac contactor coil
Two ends are parallel with reverse impulse and absorb protection diode.
3. a kind of A.C. contactor startup of intermittent power supply according to claim 1 remains on circuit, it is characterized in that：
Described rectification circuit for 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 startup of intermittent power supply according to claim 1 remains on circuit, it is characterized in that：
Described square-wave generator is the frequency being made up of operational amplifier and the adjustable circuit of dutycycle, and containing control square wave time delay
The RC delay circuit producing.
5. a kind of A.C. contactor startup of intermittent power supply according to claim 1 remains on circuit, it is characterized in that：
It is provided with current-limiting resistance, filter circuit of pressure-stabilizing A and voltage stabilizing between the negative pole of described constant-current source circuit and rectification circuit DC output side
Filter circuit B, wherein current-limiting resistance are in parallel with filter circuit of pressure-stabilizing B composition again with after filter circuit of pressure-stabilizing A composition series circuit
Loop；And it is additionally provided with quick discharging circuit, quick discharging circuit is used for, when A.C. contactor has a power failure, quickly bleeding off voltage stabilizing filter
Remaining voltage on electric capacity in wave circuit, to guarantee A.C. contactor quick startup optimization again.
6. a kind of A.C. contactor of the intermittent power supply according to any one claim in claim 1 to 5 starts
Remain on circuit, it is characterized in that：Described square wave drive circuit forms emitter follower push-pull circuit by audion Q2, Q3, Q4,
To drive conducting and the cut-off of metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620981065.3U CN205992505U (en) | 2016-08-30 | 2016-08-30 | A kind of A.C. contactor startup of intermittent power supply remains on circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620981065.3U CN205992505U (en) | 2016-08-30 | 2016-08-30 | A kind of A.C. contactor startup of intermittent power supply remains on circuit |
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| Publication Number | Publication Date |
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| CN205992505U true CN205992505U (en) | 2017-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620981065.3U Expired - Fee Related CN205992505U (en) | 2016-08-30 | 2016-08-30 | A kind of A.C. contactor startup of intermittent power supply remains on circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265260A (en) * | 2019-06-26 | 2019-09-20 | 浙江阿尔法电气有限公司 | A kind of frequency converter soft start contactor drive circuit |
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2016
- 2016-08-30 CN CN201620981065.3U patent/CN205992505U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265260A (en) * | 2019-06-26 | 2019-09-20 | 浙江阿尔法电气有限公司 | A kind of frequency converter soft start contactor drive circuit |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170301 |