CN208674002U - The coil control circuit of contactor - Google Patents
The coil control circuit of contactor Download PDFInfo
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- CN208674002U CN208674002U CN201821327327.XU CN201821327327U CN208674002U CN 208674002 U CN208674002 U CN 208674002U CN 201821327327 U CN201821327327 U CN 201821327327U CN 208674002 U CN208674002 U CN 208674002U
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Abstract
The utility model provides a kind of coil control circuit of contactor, including afterflow control circuit and coil driver, coil driver includes the PWM generator U3 of metal-oxide-semiconductor T1 and driving metal-oxide-semiconductor T1, the drain electrode of metal-oxide-semiconductor T1 is connect with contactor coil, the source electrode of metal-oxide-semiconductor T1 is grounded, with the conducting and shutdown between control contactor coil and contactor power supply, the afterflow control circuit, it is made of bidirection switching device K1, metal-oxide-semiconductor T2 and afterflow tube drive circuit, the synchronous control signal of afterflow tube drive circuit is provided by coil driver；It is attracted in contactor and sticking stage, the switch state of the metal-oxide-semiconductor T1 of the bidirection switching device K1 and coil driver of afterflow control circuit is complementary relationship, i.e., when metal-oxide-semiconductor T1 is connected, bidirection switching device K1 shutdown, contactor coil energy storage at this time；When metal-oxide-semiconductor T1 shutdown, bidirection switching device K1 conducting provides low-impedance freewheeling path by bidirection switching device K1 for contactor coil.
Description
Technical field
The utility model relates to A.C. contactor fields, and in particular to the coil control circuit of contactor.
Background technique
The electromagnetic control system of traditional contactors is made of coil and iron core, and the number of turns of coil is much several hundred or even thousands of
Circle, contactor coil are actually a sensibility reciprocal and the very big inductance of internal resistance, and the sensibility reciprocal of usual contactor coil is several hundred millis
Henry arrives the rank of several henries, and internal resistance has tens ohm to arrive several hundred ohms.The whole work process of contactor coil can be divided into three
Stage: stage, sticking stage and off-phases are attracted.In the stage of actuation, contactor coil passes through biggish operating current, coil
Generating biggish electromagnetic force is closed probe of contactor, and the process is generally within 200ms.After probe of contactor is attracted,
The sticking stage has been entered, has been about 1/10th of operating current in the holding current of this stage coil, excessive sticking electricity
Stream can be such that the loss of coil increases.And the stage that probe of contactor disconnects is known as off-phases, the electric current of coil, which is consumed, to be connect
Tentaculum contact just will disconnect.Contactor coil needs high current when being attracted, and lesser electric current is only needed in sticking.Traditional
Contactor, can only be by the impedance of coil itself come current limliting without other control elements.It is attracted required high current, line in order to balance
The impedance of circle cannot be designed too big.So the electric current that coil flows through is much larger than actually required in contactor holding course
Electric current, the heat for the coil that extra energy becomes, not only waste of energy, but also the temperature of coil can be made to increase reliability drop
It is low.In order to solve the problems, such as that traditional contactors power consumption is big, there is the power save circuit of many contactors.
If the circuit of Fig. 1 is exactly a kind of common power save circuit, by the duty ratio for adjusting metal-oxide-semiconductor TR1, so that it may which adjusting connects
The electric current of tentaculum coil 1.It makes the duty of TR1 bigger in the actuation stage, makes the duty of TR1 smaller in the sticking stage, so that it may
To allow contactor coil to realize, high current is attracted low current sticking, to reach energy-efficient effect.In the circuit, diode
D1, metal-oxide-semiconductor TR2 provide the continuous current circuit of coil, in the contactor sticking stage, when metal-oxide-semiconductor TR1 is in an off state, and metal-oxide-semiconductor
TR2 conducting, provides the continuous current circuit of contactor coil inductance, at this time the continuous current circuit pressure drop of diode D1, metal-oxide-semiconductor TR2 composition
About 0.75V, the Low ESR continuous current circuit in sticking stage are conducive to reduce the loss of entire circuit.When in contactor off-phases
When, it needs to rapidly deplete the electric current of coil, contactor can be turned off rapidly.Contactor off-phases, metal-oxide-semiconductor TR2 are persistently closed
It is disconnected, while metal-oxide-semiconductor TR1 also synchronizes lasting shutdown, contactor coil electric current is consumed rapidly, so that contactor rapidly switches off.
Utility model content
The utility model aim is the coil control circuit for proposing a kind of contactor, rapidly switches off contactor
While, so that contactor coil is smaller in the loss in sticking stage.
In order to realize above-mentioned purpose of utility model, the utility model provides a kind of coil control circuit of contactor, including
Afterflow control circuit and coil driver, coil driver include the PWM generator U3 of metal-oxide-semiconductor T1 and driving metal-oxide-semiconductor T1,
The drain electrode of metal-oxide-semiconductor T1 is connect with contactor coil, the source electrode ground connection of metal-oxide-semiconductor T1, with control contactor coil and contactor power supply
Between conducting and shutdown, the afterflow control circuit, by bidirection switching device K1, metal-oxide-semiconductor T2 and afterflow tube drive circuit group
At the synchronous control signal of afterflow tube drive circuit is provided by coil driver；It is attracted and sticking stage, afterflow in contactor
The switch state of the metal-oxide-semiconductor T1 of the bidirection switching device K1 and coil driver of control circuit is complementary relationship, that is, works as metal-oxide-semiconductor
When T1 is connected, bidirection switching device K1 shutdown, contactor coil energy storage at this time；When metal-oxide-semiconductor T1 shutdown, bidirection switching device K1
Conducting, provides low-impedance freewheeling path by bidirection switching device K1 for contactor coil；In contactor off-phases, MOS
Pipe T1 is simultaneously turned off with bidirection switching device K1, so that contactor rapidly switches off.
Preferably, the afterflow control circuit includes bidirection switching device K1, resistance R1, capacitor C1, resistance R3, metal-oxide-semiconductor
T2, PhotoMOS relay is used with door U1 and NOT gate U2, bidirection switching device K1；Coil driver includes metal-oxide-semiconductor T1, resistance
R2, capacitor C2 and PWM generator U3；Its connection relationship are as follows: two output ends of bidirection switching device K1 are drawn respectively as continuous
The output end of flow control circuit is connected for the both ends with contactor coil；The net of connecting that resistance R1 is composed in series with capacitor C1
Network is connected in parallel on two output ends of bidirection switching device K1；The input anode of bidirection switching device K1 passes through resistance R3 connection electricity
Source VCC anode, the drain electrode of the input negative terminal connection metal-oxide-semiconductor T2 of bidirection switching device K1, the source electrode of metal-oxide-semiconductor T2 are connected to power supply
Ground；The output end of the grid connection and door U1 of metal-oxide-semiconductor T2；With two input terminals of door, connection contactor controls signal, and one
The output end of a connection NOT gate U2, the input terminal of NOT gate U2 are connected to the output end of PWM generator U3；PWM generator U3's is defeated
Enter enable end connection contactor control signal, the output end of PWM generator U3 is also connected with one end of resistance R2, and resistance R2's is another
The grid of end connection metal-oxide-semiconductor T1, the source electrode of metal-oxide-semiconductor T1 connect power ground, and the both ends of capacitor C2 are connected to the grid of metal-oxide-semiconductor T1
Pole and source electrode.
Preferably, the afterflow control circuit includes bidirection switching device K1, resistance R1, capacitor C1, resistance R3, metal-oxide-semiconductor
T2, electromagnetic relay is used with door U1 and NOT gate U2, bidirection switching device K1；Coil driver includes metal-oxide-semiconductor T1, resistance
R2, capacitor C2 and PWM generator U3；Its connection relationship are as follows: two output ends of bidirection switching device K1 are drawn respectively as continuous
The output end of flow control circuit is connected for the both ends with contactor coil；The net of connecting that resistance R1 is composed in series with capacitor C1
Network is connected in parallel on two output ends of bidirection switching device K1；The input anode of bidirection switching device K1 passes through resistance R3 connection electricity
Source VCC anode, the drain electrode of the input negative terminal connection metal-oxide-semiconductor T2 of bidirection switching device K1, the source electrode of metal-oxide-semiconductor T2 are connected to power supply
Ground, the output end of the grid connection and door U1 of metal-oxide-semiconductor T2, two input terminals with door, a connection contactor control signal, one
The output end of a connection NOT gate U2, the input terminal of NOT gate U2 are connected to the output end of PWM generator U3；PWM generator U3's is defeated
Enter enable end connection contactor control signal, the output end of PWM generator U3 is also connected with one end of resistance R2, and resistance R2's is another
The grid of end connection metal-oxide-semiconductor T1, the source electrode of metal-oxide-semiconductor T1 connect power ground, and the both ends of capacitor C2 are connected to the grid of metal-oxide-semiconductor T1
Pole and source electrode.
The utility model also provides a kind of coil control circuit of contactor, including afterflow control circuit and coil drive electricity
Road, coil driver, the PWM generator U3 including metal-oxide-semiconductor T1 and driving metal-oxide-semiconductor T1, the drain electrode of metal-oxide-semiconductor T1 and contactor line
Circle connection, the source electrode ground connection of metal-oxide-semiconductor T1, the afterflow control circuit, including bidirection switching device K1 and metal-oxide-semiconductor T2, connection
Relationship are as follows: two output ends of bidirection switching device K1 draw the output end as afterflow control circuit respectively, for contact
The both ends of device coil are connected；The input anode connection power supply VCC anode of bidirection switching device K1, the input of bidirection switching device K1
Negative terminal connects the drain electrode of metal-oxide-semiconductor T2, and the source electrode of metal-oxide-semiconductor T2 is connected to power ground；Metal-oxide-semiconductor T2 is driven by afterflow tube drive circuit.
Preferably, the afterflow control circuit, further includes resistance R3, and resistance R3 seals in power supply VCC anode and two-way switch
Between the input anode of device K1, i.e., one end of resistance R3 is connect with power supply VCC anode, the other end and two-way switch of resistance R3
The input anode of device K1 connects.
Preferably, the afterflow tube drive circuit, including with door U1 and NOT gate U2, two input terminals with door U1, one
It connects contactor and controls signal, the output end of a connection NOT gate U2, the input terminal of NOT gate U2 is connected to the defeated of PWM generator U3
Outlet；It is connect with the output end of door U1 with the grid of metal-oxide-semiconductor T2.
Preferably, the afterflow tube drive circuit, including with door U1, NOT gate U2, resistance R2 and capacitor C2, with door U1 two
A input terminal, a connection contactor control signal, the output end of a connection NOT gate U2, and the input terminal of NOT gate U2 is connected to
The output end of PWM generator U3；The output end of PWM generator U3 is also connected with one end of resistance R2, the other end connection of resistance R2
The grid of metal-oxide-semiconductor T1；The grid of metal-oxide-semiconductor T2 is connect with the output end of door U1.
Preferably, the bidirection switching device K1 of the afterflow control circuit, using PhotoMOS relay, PhotoMOS relay
Two output ends draw the output end as afterflow control circuit respectively, are connected for the both ends with contactor coil；Light MOS after
The input anode of electric appliance passes through resistance R3 connection power supply VCC anode, the leakage of the input negative terminal connection metal-oxide-semiconductor T2 of PhotoMOS relay
Pole.
Preferably, the bidirection switching device K1 of the afterflow control circuit, using electromagnetic relay, the two of electromagnetic relay
A output end draws the output end as afterflow control circuit respectively, is connected for the both ends with contactor coil；Electromagnetism relay
The input anode of device passes through resistance R3 connection power supply VCC anode, the drain electrode of the input negative terminal connection metal-oxide-semiconductor T2 of electromagnetic relay.
Preferably, the afterflow control circuit, further includes resistance R1 and capacitor C1, what resistance R1 and capacitor C1 were composed in series
Series network is connected in parallel on two output ends of bidirection switching device K1.
Continuous current circuit of the utility model using low-impedance bidirection switching device as contactor coil replaces circuit diagram 1
The continuous current circuit of TR2 and D1 composition in shown prior art, the bidirection switching device can be PhotoMOS relay or electricity
The conducting resistance of magnetic relay, PhotoMOS relay and electromagnetic relay is in tens milliohm ranks, conduction voltage drop about 0.1V, phase
Than the continuous current circuit conduction voltage drop about 0.75V that the TR2 and D1 of available circuit are formed, the utility model has lower conducting to hinder
It is anti-, in the sticking stage of contactor, energy loss be only its 1/7.
Detailed description of the invention
Fig. 1 is the circuit diagram for the contactor power save circuit that prior art band rapidly switches off function；
Fig. 2A is the schematic block circuit diagram of the coil control circuit of the utility model first embodiment contactor；
Fig. 2 B is the circuit diagram of the coil control circuit of the utility model first embodiment contactor；
Fig. 3 is switch T1, bidirection switching device K1 in the coil control circuit of the utility model first embodiment contactor
And the timing diagram of contactor status signal；
Fig. 4 is the control signal timing diagram of the coil control circuit of the utility model first embodiment contactor；
Fig. 5 is the circuit diagram of the coil control circuit of the utility model second embodiment contactor.
Specific embodiment
The utility model provides a kind of coil control circuit of contactor, as shown in Figure 2 A, including by low-impedance two-way
Afterflow control circuit FC1, coil driver FC2 and the contactor coil L of switching device and ON-OFF control circuit composition.Afterflow
Control circuit FC1 includes a low-impedance bidirection switching device K1, which can be PhotoMOS relay or electricity
Magnetic relay.The circuit connecting relation of the utility model are as follows: two output ends of the bidirection switching device K1 (switch
Pole) it is connected respectively with the both ends of contactor coil L, the input anode of bidirection switching device K1 connects positive pole by resistance,
The input negative terminal connection switch control circuit of bidirection switching device K1, is connected to power ground by ON-OFF control circuit.Two-way opened
Close the afterflow control circuit FC1 of device and ON-OFF control circuit composition contactor coil.Afterflow control circuit FC1 receives contactor
The driving signal of signal Sin and coil driver FC2 are controlled, to cooperate synchronization action.In addition, coil driver FC2
Comprising at least one switch T1, one end of contactor coil L is connected with contactor positive pole, the other end of contactor coil L
A switch pole of connection switch T1, another switch pole of switch T1 are connected to contactor power ground.Coil driver FC2
It receives contactor and controls signal Sin, according to the polarity of Sin to determine whether output PWM drive signal is with drive control switch T1
Conducting and shutdown, thus the actuation and shutdown of control contactor.
Specifically, a kind of coil control circuit of contactor, suitable for the coil of control contactor, including by Low ESR
Bidirection switching device and ON-OFF control circuit composition afterflow control circuit FC1, coil driver FC2 and contactor coil
L.Afterflow control circuit FC1 includes a low-impedance bidirection switching device K1, which can be light MOS relay
Device or electromagnetic relay.Coil driver FC2 include at least one switch T1, for control contactor coil energization with break
Electricity.When contactor actuation and sticking stage, switch T1 is opposite state with the switch state of bidirection switching device K1, i.e., ought open
Close T1 conducting, bidirection switching device K1 shutdown, at this time contactor coil energy storage；When switch T1 is turned off, bidirection switching device K1 is led
Logical, K1 provides low-impedance freewheeling path for contactor coil, with hold-in winding energy.In contactor off-phases, switch T1
It is simultaneously turned off with bidirection switching device, contactor coil energy storage quick release achievees the purpose that contactor rapidly switches off.Switch
T1, bidirection switching device K1 and contactor state timing chart are as shown in Figure 3.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
The utility model is further described in example.
First embodiment
The first embodiment of the coil control circuit of the utility model contactor is as shown in Figure 2 B.The utility model provides one
The coil control circuit of kind contactor, including the afterflow control being made of low-impedance bidirection switching device K1 and ON-OFF control circuit
Circuit FC1, coil driver FC2 and contactor coil L processed.Afterflow control circuit FC1 includes bidirection switching device K1, resistance
R3, metal-oxide-semiconductor T2 and the afterflow tube drive circuit for driving metal-oxide-semiconductor T2, wherein bidirection switching device K1 is PhotoMOS relay；Resistance
R3 is current-limiting resistance, is chosen according to the operating voltage of bidirection switching device K1, and the resistance in 0 Europe can be selected；Continued flow tube driving electricity
Routing is constituted with door U1 and NOT gate U2；Afterflow control circuit FC1 may also include absorbing circuit, and absorbing circuit is by resistance R1 and capacitor
C1 is constituted.For the delay for offsetting two-way switch K1 control circuit, afterflow tube drive circuit may also include delay circuit, delay circuit
It is made of resistance R2 and capacitor C2.Coil driver FC2 includes metal-oxide-semiconductor T1 and PWM generator U3.
The connection relationship of the coil control circuit of the utility model contactor are as follows: two output ends of bidirection switching device K1
(i.e. switch pole) is connected with the both ends of contactor coil L respectively, and the resistance R1 and capacitor C1 series network formed is connected in parallel on two-way
On two output ends of switching device K1, while being also connected in parallel on the both ends of contactor coil L；The input of bidirection switching device K1 is just
End passes through resistance R3 connection power supply VCC anode, the drain electrode of the input negative terminal connection metal-oxide-semiconductor T2 of bidirection switching device K1, metal-oxide-semiconductor T2
Source electrode be connected to power ground, the grid of metal-oxide-semiconductor T2 is connected with the output end of door U1, two input terminals with door, a company
Contactor control signal Sin, the output end of a connection NOT gate U2 are met, the input terminal of NOT gate U2 is connected to PWM generator U3's
Output end.The output enable end connection contactor of PWM generator U3 controls signal Sin, and the output end of PWM generator U3 connects electricity
One end of R2 is hindered, the grid of the other end connection metal-oxide-semiconductor T1 of resistance R2, one end of contactor coil L connects contactor power supply
The drain electrode of the other end connection metal-oxide-semiconductor T1 of VPP, contactor coil L, the source electrode of metal-oxide-semiconductor T1 connect power ground, the both ends of capacitor C2
It is connected to the grid and source electrode of metal-oxide-semiconductor T1.
It is illustrated in figure 3 the timing diagram of contactor control signal Sin and metal-oxide-semiconductor T1, bidirection switching device K1, such as Fig. 4 institute
It is shown as the timing of the output end voltage VB of the output end voltage VA and door U1 of contactor control signal Sin and PWM generator U3
Figure.The control principle of the coil control circuit of the utility model first embodiment contactor is described as follows:
1, when contactor control signal Sin is low level, contactor is in an off state, when Sin becomes high from low level
Level enables PWM generator U3 output pwm signal, and first pulse of PWM generator U3 output is a broad pulse, to protect
Card contactor coil flows through high current, guarantees the stabilization quick pick-up of contactor, and subsequent output burst pulse maintains contactor coil
In a low current state, to reduce the energy consumption in contactor sticking stage.
2, when Sin becomes high level from low level, an input terminal with door U1 is Sin, is high level, defeated with door U1
VB follows its another input terminal, the i.e. output of NOT gate U2 out.The output VA that the input of NOT gate U2 is PWM generator U3 is (following
Referred to as VA), i.e., it is at this time the reverse phase that PWM generator U3 exports VA with the output VB (hereinafter referred to as VB) of door U1.VA passes through
Resistance R2, capacitor C2 drive the conducting and shutdown of metal-oxide-semiconductor T1, and VB drives metal-oxide-semiconductor T2, control bidirection switching device K1 switch pole
Conducting and shutdown.When VA is high level, VB is low level, and metal-oxide-semiconductor T1 is connected at this time, bidirection switching device K1 shutdown, contact
Device coil L energy storage；When VA is low level, VB is high level, and metal-oxide-semiconductor T1 is turned off at this time, bidirection switching device K1 conducting, contact
Device coil L is by bidirection switching device K1 afterflow, with hold-in winding energy.Wherein resistance R2, capacitor C2 form delay circuit, with
The time delay of bidirection switching device K1 control circuit is offset, so that metal-oxide-semiconductor T1, bidirection switching device K1 movement synchronize.
3, when Sin becomes low level from high level, it is low level, no matter its is another that an input terminal with door U1, which is Sin,
Which kind of level a input terminal is, all exports low level with the output VB of door U1, PWM generator U3 is prohibited to export at this time, and VA is defeated
Low level out, metal-oxide-semiconductor T1 is turned off at this time, and simultaneously bi-directionally switching device K1 is turned off, and the energy quick release of contactor coil L connects
Tentaculum turns off rapidly.Wherein the absorbing circuit of resistance R1, capacitor C1 composition can prevent bidirection switching device K1, the both ends metal-oxide-semiconductor T1
It generates excessively high voltage and is damaged.
4, Fig. 4 Sin, VA, VB etc. control the timing diagram of signal.
Second embodiment
The second embodiment of the coil control circuit of the utility model contactor is as shown in Figure 5.The utility model provides one
The coil control circuit of kind contactor, as shown in figure 5, including by low-impedance bidirection switching device K1 and ON-OFF control circuit group
At afterflow control circuit FC1, coil driver FC2 and contactor coil L.Afterflow control circuit FC1 includes two-way switch
Device K1, resistance R1, capacitor C1, resistance R3, metal-oxide-semiconductor T2 and door U1 and NOT gate U2, wherein bidirection switching device K1 is electromagnetism
Relay.Coil driver FC2 includes metal-oxide-semiconductor T1, resistance R2, capacitor C2 and PWM generator U3.
Its connection relationship are as follows: two output ends of bidirection switching device K1 are connected with the both ends of contactor coil L respectively, electricity
The series network of resistance R1 and capacitor C1 composition is connected in parallel on two output ends of bidirection switching device K1, while being also connected in parallel on contact
The both ends of device coil L；The input anode of bidirection switching device K1 passes through resistance R3 connection power supply VCC anode, bidirection switching device
The drain electrode of the input negative terminal connection metal-oxide-semiconductor T2 of K1, the source electrode of metal-oxide-semiconductor T2 are connected to power ground, the grid of metal-oxide-semiconductor T2 with door U1
Output end be connected, two input terminals with door, connection contactor controls signal Sin, the output of a connection NOT gate U2
End, the input terminal of NOT gate U2 are connected to the output end of PWM generator U3.The input enable end of PWM generator U3 connects contactor
Signal Sin is controlled, the output end of U3 is also connected with one end of resistance R2, the grid of the other end connection metal-oxide-semiconductor T1 of resistance R2；Contact
One end of device coil L connects contactor power supply VPP, and the other end of contactor coil L connects the drain electrode of metal-oxide-semiconductor T1, metal-oxide-semiconductor T1's
Source electrode connects power ground, and the both ends of capacitor C2 are connected to the grid and source electrode of metal-oxide-semiconductor T1.
The control method of the coil control circuit of the utility model second embodiment contactor is identical with the first embodiment.
The coil control circuit of the utility model contactor, using low-impedance bidirection switching device as contactor coil
Continuous current circuit replace available circuit as shown in Figure 1 in metal-oxide-semiconductor TR2 and diode D1 composition continuous current circuit, the two-way opened
Closing device can be PhotoMOS relay or electromagnetic relay, and the conducting resistance of PhotoMOS relay and electromagnetic relay is in tens millis
Europe rank, compared to the conduction voltage drop of the about 0.75V of the continuous current circuit of metal-oxide-semiconductor TR2 and diode the D1 composition of available circuit, this reality
Conduction impedance can further be reduced with New Scheme, in the sticking stage of contactor, energy loss be only its 1/7.
Above are merely preferred embodiments of the utility model, it is noted that above-mentioned preferred embodiment should not regard
For limitations of the present invention, the protection scope of the utility model should be defined by the scope defined by the claims..For
For those skilled in the art, without departing from the spirit and scope of the utility model, it can also make several
Improvements and modifications, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (10)
1. a kind of coil control circuit of contactor, including afterflow control circuit and coil driver, coil driver packet
It includes metal-oxide-semiconductor T1 and drives the PWM generator U3 of metal-oxide-semiconductor T1, the drain electrode of metal-oxide-semiconductor T1 is connect with contactor coil, the source of metal-oxide-semiconductor T1
Pole ground connection, it is characterised in that:
The afterflow control circuit is made of bidirection switching device K1, metal-oxide-semiconductor T2 and afterflow tube drive circuit；
It is attracted and sticking stage, the bidirection switching device K1 of afterflow control circuit and the metal-oxide-semiconductor of coil driver in contactor
The switch state of T1 is complementary relationship；
In contactor off-phases, metal-oxide-semiconductor T1 is simultaneously turned off with bidirection switching device K1.
2. the coil control circuit of contactor according to claim 1, it is characterised in that: the afterflow control circuit includes
Bidirection switching device K1, resistance R1, capacitor C1, resistance R3, metal-oxide-semiconductor T2 and door U1 and NOT gate U2, bidirection switching device K1 are used
PhotoMOS relay；Coil driver includes metal-oxide-semiconductor T1, resistance R2, capacitor C2 and PWM generator U3；
Its connection relationship are as follows: two output ends of bidirection switching device K1 draw the output end as afterflow control circuit respectively,
It is connected for the both ends with contactor coil；The series network that resistance R1 and capacitor C1 are composed in series is connected in parallel on bidirection switching device
On two output ends of K1；The input anode of bidirection switching device K1 passes through resistance R3 connection power supply VCC anode, two-way switch device
The drain electrode of the input negative terminal connection metal-oxide-semiconductor T2 of part K1, the source electrode of metal-oxide-semiconductor T2 are connected to power ground；Metal-oxide-semiconductor T2 grid connection with
The output end of door U1；With two input terminals of door, a connection contactor controls signal, and one connects the output end of NOT gate U2,
The input terminal of NOT gate U2 is connected to the output end of PWM generator U3；The input enable end connection contactor control of PWM generator U3
Signal, the output end of PWM generator U3 are also connected with one end of resistance R2, and the other end of resistance R2 connects the grid of metal-oxide-semiconductor T1,
The source electrode of metal-oxide-semiconductor T1 connects power ground, and the both ends of capacitor C2 are connected to the grid and source electrode of metal-oxide-semiconductor T1.
3. the coil control circuit of contactor according to claim 1, it is characterised in that: the afterflow control circuit includes
Bidirection switching device K1, resistance R1, capacitor C1, resistance R3, metal-oxide-semiconductor T2 and door U1 and NOT gate U2, bidirection switching device K1 are adopted
Use electromagnetic relay；Coil driver includes metal-oxide-semiconductor T1, resistance R2, capacitor C2 and PWM generator U3；
Its connection relationship are as follows: two output ends of bidirection switching device K1 draw the output end as afterflow control circuit respectively,
It is connected for the both ends with contactor coil；The series network that resistance R1 and capacitor C1 are composed in series is connected in parallel on bidirection switching device
On two output ends of K1；The input anode of bidirection switching device K1 passes through resistance R3 connection power supply VCC anode, two-way switch device
The drain electrode of the input negative terminal connection metal-oxide-semiconductor T2 of part K1, the source electrode of metal-oxide-semiconductor T2 are connected to power ground, the grid connection of metal-oxide-semiconductor T2 with
The output end of door U1, two input terminals with door, a connection contactor control signal, and one connects the output end of NOT gate U2,
The input terminal of NOT gate U2 is connected to the output end of PWM generator U3；The input enable end connection contactor control of PWM generator U3
Signal, the output end of PWM generator U3 are also connected with one end of resistance R2, and the other end of resistance R2 connects the grid of metal-oxide-semiconductor T1,
The source electrode of metal-oxide-semiconductor T1 connects power ground, and the both ends of capacitor C2 are connected to the grid and source electrode of metal-oxide-semiconductor T1.
4. a kind of coil control circuit of contactor, including afterflow control circuit and coil driver, coil driver, packet
It includes metal-oxide-semiconductor T1 and drives the PWM generator U3 of metal-oxide-semiconductor T1, the drain electrode of metal-oxide-semiconductor T1 is connect with contactor coil, the source of metal-oxide-semiconductor T1
Pole ground connection, it is characterised in that:
The afterflow control circuit, including bidirection switching device K1 and metal-oxide-semiconductor T2, connection relationship are as follows: bidirection switching device K1
Two output ends draw the output end as afterflow control circuit respectively, be connected for the both ends with contactor coil；It is two-way
The input anode connection power supply VCC anode of switching device K1, the leakage of the input negative terminal connection metal-oxide-semiconductor T2 of bidirection switching device K1
The source electrode of pole, metal-oxide-semiconductor T2 is connected to power ground；Metal-oxide-semiconductor T2 is driven by afterflow tube drive circuit.
5. the coil control circuit of contactor according to claim 4, it is characterised in that: the afterflow control circuit, also
Including resistance R3, resistance R3 is sealed between power supply VCC anode and the input anode of bidirection switching device K1, i.e. one end of resistance R3
It is connect with power supply VCC anode, the other end of resistance R3 is connect with the input anode of bidirection switching device K1.
6. the coil control circuit of contactor according to claim 4, it is characterised in that: the afterflow tube drive circuit,
Including with door U1 and NOT gate U2, two input terminals with door U1, a connection contactor controls signal, connection NOT gate U2's
Output end, the input terminal of NOT gate U2 are connected to the output end of PWM generator U3；With the output end of door U1 and the grid of metal-oxide-semiconductor T2
Connection.
7. the coil control circuit of contactor according to claim 4, it is characterised in that: the afterflow tube drive circuit,
Including with door U1, NOT gate U2, resistance R2 and capacitor C2, two input terminals with door U1, a connection contactor controls signal, and one
The output end of a connection NOT gate U2, the input terminal of NOT gate U2 are connected to the output end of PWM generator U3；PWM generator U3's is defeated
Outlet is also connected with one end of resistance R2, the grid of the other end connection metal-oxide-semiconductor T1 of resistance R2；MOS is connect with the output end of door U1
The grid of pipe T2.
8. the coil control circuit of contactor according to claim 4, it is characterised in that: pair of the afterflow control circuit
To switching device K1, using PhotoMOS relay, two output ends of PhotoMOS relay are drawn respectively as afterflow control circuit
Output end, be connected for the both ends with contactor coil；The input anode of PhotoMOS relay passes through resistance R3 connection power supply
VCC anode, the drain electrode of the input negative terminal connection metal-oxide-semiconductor T2 of PhotoMOS relay.
9. the coil control circuit of contactor according to claim 4, it is characterised in that: pair of the afterflow control circuit
To switching device K1, using electromagnetic relay, two output ends of electromagnetic relay are drawn respectively as afterflow control circuit
Output end is connected for the both ends with contactor coil；The input anode of electromagnetic relay is passing through resistance R3 connection power supply VCC just
Pole, the drain electrode of the input negative terminal connection metal-oxide-semiconductor T2 of electromagnetic relay.
10. the coil control circuit of contactor according to claim 4, it is characterised in that: the afterflow control circuit, also
Including resistance R1 and capacitor C1, the series network that resistance R1 and capacitor C1 are composed in series is connected in parallel on two of bidirection switching device K1
On output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821327327.XU CN208674002U (en) | 2018-08-17 | 2018-08-17 | The coil control circuit of contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821327327.XU CN208674002U (en) | 2018-08-17 | 2018-08-17 | The coil control circuit of contactor |
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| Publication Number | Publication Date |
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| CN208674002U true CN208674002U (en) | 2019-03-29 |
Family
ID=65836495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821327327.XU Withdrawn - After Issue CN208674002U (en) | 2018-08-17 | 2018-08-17 | The coil control circuit of contactor |
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| Country | Link |
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| CN (1) | CN208674002U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108735552A (en) * | 2018-08-17 | 2018-11-02 | 广州金升阳科技有限公司 | The coil control circuit of contactor |
| CN112838764A (en) * | 2021-02-26 | 2021-05-25 | 西安微电子技术研究所 | Power supply level conversion circuit and method |
-
2018
- 2018-08-17 CN CN201821327327.XU patent/CN208674002U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108735552A (en) * | 2018-08-17 | 2018-11-02 | 广州金升阳科技有限公司 | The coil control circuit of contactor |
| WO2020034665A1 (en) * | 2018-08-17 | 2020-02-20 | 广州金升阳科技有限公司 | Coil control circuit of contactor |
| CN108735552B (en) * | 2018-08-17 | 2024-01-16 | 广州金升阳科技有限公司 | Coil control circuit of contactor |
| CN112838764A (en) * | 2021-02-26 | 2021-05-25 | 西安微电子技术研究所 | Power supply level conversion circuit and method |
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