CN109494120A - Control relay circuit - Google Patents
Control relay circuit Download PDFInfo
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- CN109494120A CN109494120A CN201811582844.6A CN201811582844A CN109494120A CN 109494120 A CN109494120 A CN 109494120A CN 201811582844 A CN201811582844 A CN 201811582844A CN 109494120 A CN109494120 A CN 109494120A
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- 238000001514 detection method Methods 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000009471 action Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 6
- 230000003111 delayed effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007600 charging Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000005352 galvanomagnetic phenomena Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- 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
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H47/18—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for introducing delay in the operation of the relay
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- Relay Circuits (AREA)
Abstract
The present invention relates to a kind of control relay circuits, it include: relay coil, switching module, detection module and time delay module, switching module is for receiving first control signal or second control signal, when receiving first control signal, switching module controls relay coil power-off, so that relay coil does not work；When receiving second control signal, switching module relay coil is powered on, detection module detects relay power, output signal controls time delay module output delay voltage, to reduce the pressure drop at relay coil both ends, voltage by reducing relay coil both ends can reduce the actual power of relay coil, and then can reduce the power consumption of relay.
Description
Technical field
The present invention relates to relay fields, more particularly to control relay circuit.
Background technique
Electromagnetic relay is a kind of electronic device of low-voltage control circuit control high-pressure work circuit work, is usually used in various
In electronic circuit.In general, electromagnetic relay is made of coil, armature, contact reed etc., when thering is electric current to flow through in coil,
Under the action of galvanomagnetic-effect, armature can be drawn to coil, and then movable contact and stationary contact point contact.By making movable contact and stationary contact
Contact, the conducting and disconnection for disconnecting control circuit, it is easy to use.Inventor is had found when using traditional relay, is being used
In the process, relay power consumption is higher.
Summary of the invention
Based on this, it is necessary to for the high problem of traditional relay power consumption, provide a kind of control relay circuit.
A kind of control relay circuit, comprising:
The first end of relay coil, the relay coil connects power supply；
Switching module connects the second end of the relay coil, and the switching module is for receiving first control signal
Or second control signal, when the switching module receives the first control signal, the switching module controls the relay
Coil blackout simultaneously exports high level signal, when the switching module receives the second control signal, the switching module control
The relay coil is powered and exports low level signal；
Detection module, for detecting level signal, when detect the level signal be the low level signal, the inspection
It surveys module and exports first state signal, when detecting that the level signal is the high level signal, the detection module is exported
Second status signal；
Time delay module, for receiving the first state signal or second status signal, when the time delay module connects
The first state signal is received, the time delay module controls the switching module and disconnects, so that the relay coil persistently breaks
Electricity, when the time delay module receives second status signal, the time delay module controls the switching module and is connected and passes through
The switching module output is delayed voltage to the second end of the relay coil, to reduce the pressure at the relay coil both ends
Drop.
The switching module includes first switch unit and protection location in one of the embodiments,；
The first end of the first switch unit is for inputting the first control signal or the second control signal, institute
The second end for stating first switch unit is separately connected one end of the relay coil and one end of the protection location, and described
One switch unit is used to disconnected under the action of the first control signal so that the relay coil powers off, and described first opens
The second end for closing unit exports the high level signal or the first switch unit for the work in the second control signal
It is connected with lower so that the relay coil is powered, the second end of the first switch unit exports the low level signal；
The other end of the protection location connect the relay coil first end and the power supply, it is described for eliminating
The induced potential of relay coil.
The detection module includes comparing unit and partial pressure unit in one of the embodiments,；
The comparing unit includes first input end, the second input terminal and output end, and the first input end is separately connected
The second end of the first switch unit and the second end of the relay coil, for receiving the first switch unit output
The high level signal or the low level signal, second input terminal connects the partial pressure unit, described for receiving
The fixed voltage signal of partial pressure unit output, the output end connect the time delay module；
The comparing unit is for the high level signal or the low level signal and the fixed voltage signal
Size, when the comparing unit receives the high level signal, the comparing unit exports the first state signal to institute
Time delay module is stated, when the comparing unit receives the low level signal, the comparing unit exports second status signal
To the time delay module.
The time delay module includes second switch unit and voltage regulation unit in one of the embodiments,；
The first end of the second switch unit connects the output end of the comparing unit, for receiving the first state
Signal or second status signal, the second end of the second switch unit are separately connected one end and the institute of the voltage regulation unit
The third end of first switch unit is stated, the third end of the second switch unit connects the other end and ground of the voltage regulation unit；
When the second switch unit receives the first state signal, the second switch unit control described first is opened
It closes unit to be continuously turned off, so that the relay coil remains powered off, when the second switch unit receives second state
Signal, the second switch unit disconnect, so that the voltage regulation unit accesses circuit, the voltage regulation unit is opened by described first
The second end that unit exports the delay voltage to the relay coil is closed, to reduce the pressure at the relay coil both ends
Drop.
The time delay module further includes charge/discharge unit in one of the embodiments,；
One end of the charge/discharge unit be separately connected the second switch unit first end and the comparing unit
Output end, the other end of the charge/discharge unit are separately connected the third end and ground of the second switch unit；
When the comparing unit exports the first state signal, the comparing unit charges to the charge/discharge unit,
When the comparing unit exports second status signal, the charge/discharge unit charges to the second switch unit, so that
The second switch unit delay disconnects.
Institute's first switch unit includes triode T1 in one of the embodiments, and the protection location includes diode
D1；
The base stage of the triode T1 is for receiving the first control signal or the second control signal, three pole
The collector of pipe T1 is separately connected one end, the cathode of the diode D1 and the institute of the detection module of the relay coil
First input end is stated, the anode of the diode D1 is separately connected the first end and power supply of the relay coil, three pole
The emitter of pipe T1 connects the second end of the time delay module, when the triode T1 receives the first control signal, institute
Triode T1 disconnection is stated, so that the relay coil powers off；When the triode T1 receives the second control signal, institute
Triode T1 conducting is stated, so that the relay coil is powered.
The comparing unit includes operational amplifier U1 in one of the embodiments, and the partial pressure unit includes resistance
R1 and resistance R2；
The operational amplifier U1 includes first input end, the second input terminal and output end, the first input end difference
Connect the anode of the collector of the triode T1, the second end of the relay coil and the diode D1；The output
End connects the first end of the second switch unit；
One end of the resistance R1 connects the power supply, and the other end of the resistance R1 is separately connected the one of the resistance R2
The other end of end and second input terminal, the resistance R2 is grounded.
The charge/discharge unit includes capacitor C1 in one of the embodiments, and one end of the capacitor C1 is separately connected
The first end of the output end of the operational amplifier U1 and the second switch unit, the other end ground connection of the capacitor C1.
The second switch unit includes triode T2 in one of the embodiments, and the base stage of the triode T2 connects
The output end of the operational amplifier U1 and one end of the capacitor C1 are connect, the collector of the triode T2 is separately connected described
The emitter of the emitter of one end of voltage regulation unit and the triode T1, the triode T2 is separately connected the voltage regulation unit
The other end and ground.
The voltage regulation unit includes zener diode ZD1 in one of the embodiments, the zener diode ZD1's
Anode is separately connected the emitter of the triode T1 and the collector of the triode T2, the yin of the zener diode ZD1
Pole is separately connected the emitter and ground of the triode T2.
Above-mentioned control relay circuit, when receiving first control signal, control relay coil power-off, so that relay
Coil does not work, and when receiving second control signal, relay coil is powered on, and exports delay electricity by using time delay module
Pressure can reduce the actual power of relay coil, Jin Erke by reducing pressure drop to reduce the pressure drop at relay coil both ends
To reduce the power consumption of relay.
Detailed description of the invention
Fig. 1 is the control relay circuit module diagram that one embodiment of the application provides；
Fig. 2 is the control relay circuit module diagram that the another embodiment of the application provides；
Fig. 3 is the control relay circuit structural schematic diagram that one embodiment of the application provides.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case where violating intension of the present invention, therefore the present invention is not limited by the specific embodiments disclosed below.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body is not to be to limit the present invention.
Referring to Figure 1, one embodiment of the application provides a kind of control relay circuit, comprising: switching module 100,
Detection module 200, time delay module 300 and relay coil 400.Wherein, the first end of relay coil 400 connects power supply, the
Two ends connect switching module 100.Switching module 100 is for receiving first control signal or second control signal.Work as switching module
100 receive first control signal, and switching module 100 controls relay coil 400 and powers off and export high level signal；When switching mould
Block 100 receives second control signal, and switching module 100 controls relay coil 400 and is powered and exports low level signal.Detect mould
Block 200 is for receiving low level signal or high level signal.When detection module 200 receives low level signal, detection module 200
Export first state signal；When detection module 200 receives high level signal, detection module 200 exports the second status signal.Prolong
When module 300 for receiving first state signal or the second status signal.When time delay module 300 receives first state signal,
Time delay module 300 controls switching module 100 and disconnects, so that relay coil 400 persistently powers off；When time delay module 300 receives
Second status signal, time delay module 300 control switching module 100 be connected and by switching module 100 output delay voltage to after
The second end of electric apparatus coil 400, to reduce the pressure drop at 400 both ends of relay coil.
Specifically, the control relay circuit that embodiments herein provides can be used in various electric power tools.Switch mould
Block 100 connects the main control module in electric power tool, and main control module output first control signal or second control signal are to switching mould
The input terminal of block 100.In the present embodiment, first control signal and second control signal can be voltage signal, wherein first
Controlling signal can be low-voltage, and second control signal can be high voltage.
The first end of relay coil 400 connects power supply, and the second end of relay coil 400 connects switching module 100, after
The movable contact and stationary contact of electric appliance are connected in the operating circuit of electric power tool, to control the on-off of operating circuit.Switching module
100 can disconnect under the action of first control signal, then connect 400 both ends of relay coil of switching module 100 without pressure drop, cut
It changes the mold block 100 and exports high level signal.Detection module 200 receives the high level signal that switching module 100 exports, by signal
It is handled, can be detected out current relay coil 400 and be not powered on, then export first state signal.Time delay module 300 docks
Control switching module 100 remains open after the first state signal of receipts is handled, so that relay coil 400 persistently powers off.
When i.e. switching module 100 receives first control signal, relay coil 400 does not work.
When switching module 100 receives second control signal, switching module 100 is connected under the action of second control signal,
The relay coil 400 for then connecting switching module 100 is powered, and switching module 100 exports low voltage signal.Detection module 200 is right
The low voltage signal detected is handled, that is, can determine whether that current relay coil 400 is in energized state, then detection module
200 the second status signals of output.Time delay module 300 controls switching module 100 after handling received second status signal
Constant conduction, and by the second end of the output of switching module 100 delay voltage to relay coil 400, to reduce relay line
Enclose the pressure drop at 400 both ends.
Above-mentioned control relay circuit, when receiving first control signal, control relay coil 400 is powered off, so that after
Electric apparatus coil does not work, and when receiving second control signal, relay coil 400 is powered on, defeated by using time delay module
Be delayed voltage out, to reduce the pressure drop at 400 both ends of relay coil, can reduce relay coil 400 by reducing pressure drop
Actual power, and then the power consumption of relay can be reduced.
Fig. 2 is referred to, switching module 100 includes first switch unit 110 and protection location in one of the embodiments,
120.Wherein, first switch unit 110 includes first end, second end and third end.The first end of first switch unit 110 is used for
Input first control signal or second control signal, second end are separately connected the second end and protection location of relay coil 400
120 one end, third end connect time delay module 300, and the other end of protection location 120 and the first end of relay coil 400 connect
Connect power supply.First switch unit 110 be used under the action of first control signal disconnect so that relay coil 400 power off, this
When first switch unit 110 second end export high level signal.Or first switch unit 110 is used in second control signal
Effect is lower to be connected so that relay coil 400 is powered, and 110 yuan of first switch list of second end exports low level signal at this time.
In the present embodiment, first switch unit 110 can under the control of voltage on or off, specifically can be in low electricity
Flat effect is lower to be ended, the lower conducting of high level effect, so that the power-off of relay coil 400 or energization.Protection location 120 is in parallel
In 400 both ends of relay coil, for eliminating the influence of the induced potential generated when relay coil 400 is powered.
Detection module 200 includes comparing unit 210 and partial pressure unit 220.Wherein, comparing unit 210 includes the first input
End, the second input terminal and output end.First input end connect the second end of first switch unit 110, relay coil 400 the
The points of common connection of 120 one end of one end and protection location, the high level that the second end for receiving first switch unit 110 exports
Signal or low level signal, the second input terminal connects partial pressure unit 220, for receiving the fixed voltage signal of partial pressure unit 220,
Output end connects time delay module 300.
Comparing unit 210 is used to compare the voltage swing of the output of first switch unit 110 and consolidating for the output of partial pressure unit 220
The size of constant voltage, and judge relay coil 400 whether in energized state or off-position according to comparison result.When comparing
210 received signal of unit is high level signal, and comparing unit 210 is compared place to high level signal and fixed voltage signal
Reason, and judge that relay coil 400 is in off-position according to processing result, then comparing unit 210 exports first state signal
To time delay module 300.When 210 received signal of comparing unit is low level signal, comparing unit 210 is to low level signal and admittedly
Determining voltage signal is compared processing, and judges that relay coil 400 is in energized state according to processing result, then comparing unit
210 export the second status signals to time delay module 300.In the present embodiment, first state signal can be high level signal, and second
Status signal can be low level signal.
Time delay module 300 includes second switch unit 310, voltage regulation unit 320 and charge/discharge unit 330.Wherein, charge and discharge
One end of unit 330 is separately connected the first end of second switch unit 310 and the output end of comparing unit 210, charge and discharge list 330
The other end of member is separately connected the third end and ground of second switch unit 310.
When comparing unit 210 exports first state signal namely high level signal, comparing unit 210 is to charge/discharge unit
330 chargings.Meanwhile second switch unit 310 is connected under the action of first state signal, the control of second switch unit 310 the
One switch unit 110 is continuously turned off, so that relay coil 400 remains powered off, relay does not work.
When comparing unit 210 exports the second status signal namely low level signal, comparing unit 210 is no longer to charge and discharge
Unit 330 charges.Second switch unit 310 will end under the action of the second status signal, at this point, charge/discharge unit 330
Electric discharge, and charge to second switch unit 310, second switch unit 310 will under the energy storage discharge process of charge/discharge unit 330
Continue to be connected, 310 time delayed turn-off of second switch unit is to guarantee that first switch unit 110 is effectively connected.When charge/discharge unit 330
When energy storage exhausts, second switch unit 310 is disconnected, and voltage regulation unit 320 accesses circuit at this time, and voltage regulation unit 320 is opened by first
The second end of the output of unit 110 delay voltage to relay coil 400 is closed, to reduce the pressure drop at 400 both ends of relay coil, then
It can reduce the actual power of relay coil 400, and then can reduce the power consumption of relay.
Fig. 3 is referred to, first switch unit 110 includes triode T1, protection location 120 in one of the embodiments,
Including diode D1.The base stage of triode T1 is the first end of first switch unit 110, for receive first control signal or
Second control signal.The collector of triode T1 is the second end of switch unit 110, is separately connected relay coil 400
The first input end of second end, the cathode of diode D1 and detection module.The anode of diode D1 is separately connected relay coil
400 first end and power supply.The emitter of triode T1 namely the third end of first switch unit 110 connect time delay module 300
Second end.When the triode T1 receives first control signal, the triode T1 is disconnected, so that relay coil 400
Power-off.When triode T1 receives second control signal, triode T1 conducting, so that relay coil 400 is powered.
In the present embodiment, triode T1 can be NPN type triode, first control signal is low level, and second controls
Signal processed is high level, and triode T1 can end under the action of first control signal, under the action of second control signal
Conducting.Certainly, triode T1 is also possible to PNP type triode, and first control signal is high level at this time, and second control signal is
Low level.
Comparing unit 210 includes operational amplifier U1, and partial pressure unit 220 includes resistance R1 and resistance R2.Operational amplifier
U1 includes first input end, the second input terminal and output end.Wherein, first input end is separately connected the current collection of the triode T1
The points of common connection A of the anode of pole, the second end of the relay coil 400 and the diode D1, output end connection second
The first end of switch unit and one end of charge/discharge unit.One end of resistance R1 connects power supply, and the other end of resistance R1 connects respectively
The points of common connection of one end of connecting resistance R2 and the second input terminal, resistance R1 and resistance R2 are B point, another termination of resistance R2
Ground.Comparing unit 210 can also include feedback resistance R3, and one end of feedback resistance R3 connects the output end of operational amplifier U1,
The other end connects one end and the power supply of resistance R1.
In the present embodiment, the first input end of amplifier U1 is non-inverting input terminal, and the second input terminal is inverting input terminal.
Second switch unit 310 includes triode T2, and voltage regulation unit 320 includes zener diode ZD1, charge/discharge unit
330 include capacitor C1.One end of capacitor C1 is separately connected the output end of the operational amplifier U1 and the base stage of triode T2, institute
State the other end ground connection of capacitor C1.The collector of triode T2 is separately connected the anode and triode of the zener diode ZD1
The emitter of T1, points of common connection are C point, and the emitter of triode T2 is separately connected the cathode and ground of zener diode ZD1.
In the present embodiment, it is NPN type triode that the type of triode T2 is identical as the type of triode T1.At this point, the
One status signal is high level, and the second status signal is low level.Certainly, triode T2 may be PNP transistor, then and
One status signal is low level, and the second status signal is high level.
In the following, being illustrated to circuit diagram working principle shown in Fig. 3:
For the rated operational voltage of relay coil 400 is first defined as V convenient for principles illustrated0, rated power is defined as
P0, 400 resistance of relay coil is defined as RL.400 real work voltage of relay coil is defined as V1, relay coil 400 is in fact
Border power definition is P1.It sets power source voltage Vcc in circuit provided in this embodiment and is equal to relay rated operational voltage V0, surely
Press diode ZD1 voltage rating VZValue is relay rated operational voltage V01/4, i.e. VZ=1/4V0, the resistance of resistance R1
Value is 2 times of the resistance value of resistance R2, it may be assumed that R1=2R2.
When the base stage of triode T1 inputs first control signal namely low level, triode T1 does not obtain forward bias electricity
Pressure is in off state, and relay coil 400 does not obtain voltage and do not work.At this point, the collector of triode T1 and relay line
The voltage V of the points of common connection A point of circle 400A=Vcc=V0.The points of common connection B point voltage of resistance R1 and resistance R2 because minute
Pressure effect, voltage are as follows:
Therefore, VA> VB, i.e., the voltage of operational amplifier U1 non-inverting input terminal is higher than operational amplifier U1 inverting input terminal
Voltage, operational amplifier U1 output end export first state signal namely high level.The output end of operational amplifier U1 is to capacitor
C1 charging.Wherein capacitor C1 is electrolytic capacitor, the output end and triode T2 of the anode connection operational amplifier U1 of capacitor C1
Base stage, cathode ground connection.When the cathode voltage of capacitor C1 reaches triode T2 conducting threshold voltage, triode T2 obtains forward bias
Conducting is set, zener diode ZD1 is short-circuited, and the emitter of voltage close to the 0V namely triode T1 of points of common connection C point are to connect
Ground, therefore, relay coil 400 remains powered off state.
When the base stage of triode T1 inputs second control signal namely high level, triode T1 obtains forward bias and leads
Logical, relay coil 400 obtains voltage and connects.At this time since triode T1 is connected, the collector and emitter electricity of triode
Press approximately equal, the i.e. voltage of the voltage infinite approach points of common connection C point of points of common connection A point, and C point voltage is close to 0V,
Then VA≈0V.And B point voltage VB=1/3V0, therefore VA< VB, operational amplifier U1 non-inverting input terminal voltage is lower than inverting input terminal electricity
The output end of pressure, operational amplifier U1 exports low level.Triode T2 will end, but since the energy storage electric discharge of capacitor C1 before this can
Maintain triode T2 to continue to be connected, triode T2 can be delayed cut-off, generate in this way when postpone a meeting or conference and guarantee relay coil 400 reliably
It connects.When the charge of capacitor C1 is discharged into, and triode T2 is insufficient to allow to maintain conducting, triode T2 cut-off, two pole of pressure stabilizing at this time
Pipe ZD1 access circuit, the voltage of points of common connection C point are the voltage rating of zener diode ZD1, i.e. 1/4V0, while A point
Voltage is also 1/4V0, to make to be added in the voltage at 400 both ends of relay coil from V0It is down to 3/4V0, i.e. relay real work
Voltage V1=3/4V0。
The rated power of relay are as follows:
The real work power of relay are as follows:
It therefore, can be with by the electric current of relay coil 400 by reducing the operating voltage at 400 both ends of relay coil
Reduction, then real work power reduce, be finally reached reduce relay power consumption purpose.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of control relay circuit characterized by comprising
The first end of relay coil, the relay coil connects power supply；
Switching module, connects the second end of the relay coil, and the switching module is for receiving first control signal or the
Two control signals, when the switching module receives the first control signal, the switching module controls the relay coil
High level signal is powered off and exports, when the switching module receives the second control signal, described in the switching module control
Relay coil is powered and exports low level signal；
Detection module, for detecting level signal, when detect the level signal be the low level signal, the detection mould
Block exports first state signal, and when detecting that the level signal is the high level signal, the detection module exports second
Status signal；
Time delay module, for receiving the first state signal or second status signal, when the time delay module receives institute
First state signal is stated, the time delay module controls the switching module and disconnects, so that the relay coil persistently powers off, when
The time delay module receives second status signal, and the time delay module controls the switching module and is connected and passes through described cut
The second end of block output delay voltage to the relay coil is changed the mold, to reduce the pressure drop at the relay coil both ends.
2. control relay circuit according to claim 1, which is characterized in that the switching module includes first switch list
Member and protection location；
The first end of the first switch unit is for inputting the first control signal or the second control signal, and described the
The second end of one switch unit is separately connected the first end of the relay coil and one end of the protection location, and described first
Switch unit is used to disconnect under the action of the first control signal so that relay coil power-off, the first switch
The second end of unit exports the high level signal or the first switch unit for the effect in the second control signal
Lower to be connected so that the relay coil is powered, the second end of the first switch unit exports the low level signal；
The other end of the protection location connect the relay coil first end and the power supply, for eliminating the relay
The induced potential of device coil.
3. control relay circuit according to claim 2, which is characterized in that the detection module include comparing unit and
Partial pressure unit；
The comparing unit includes first input end, the second input terminal and output end, and the first input end is separately connected described
The second end of the second end of first switch unit and the relay coil, for receiving the institute of the first switch unit output
High level signal or the low level signal are stated, second input terminal connects the partial pressure unit, for receiving the partial pressure
The fixed voltage signal of unit output, the output end connect the time delay module；
The comparing unit is big for the high level signal or the low level signal and the fixed voltage signal
Small, when the comparing unit receives the high level signal, the comparing unit exports the first state signal and prolongs to described
When module, when the comparing unit receives the low level signal, the comparing unit exports second status signal to institute
State time delay module.
4. control relay circuit according to claim 3, which is characterized in that the time delay module includes second switch list
Member and voltage regulation unit；
The first end of the second switch unit connects the output end of the comparing unit, for receiving the first state signal
Or second status signal, the second end of the second switch unit are separately connected one end and described of the voltage regulation unit
The third end at the third end of one switch unit, the second switch unit connects the other end and ground of the voltage regulation unit；
When the second switch unit receives the first state signal, the second switch unit controls the first switch list
Member is continuously turned off, so that the relay coil remains powered off, when the second switch unit receives second status signal,
The second switch unit disconnects, so that the voltage regulation unit accesses circuit, the voltage regulation unit passes through the first switch list
Member exports the second end of the delay voltage to the relay coil, to reduce the pressure drop at the relay coil both ends.
5. control relay circuit according to claim 4, which is characterized in that the time delay module further includes charge and discharge list
Member；
One end of the charge/discharge unit is separately connected the first end of the second switch unit and the output of the comparing unit
End, the other end of the charge/discharge unit are separately connected the third end and ground of the second switch unit；
When the comparing unit exports the first state signal, the comparing unit charges to the charge/discharge unit, works as institute
It states comparing unit and exports second status signal, the charge/discharge unit charges to the second switch unit, so that described
The delay of second switch unit disconnects.
6. the control relay circuit according to any one of claim 2-5, which is characterized in that institute's first switch unit packet
Triode T1 is included, the protection location includes diode D1；
The base stage of the triode T1 is for receiving the first control signal or the second control signal, the triode T1
Collector be separately connected described the of one end of the relay coil, the cathode of the diode D1 and the detection module
One input terminal, the anode of the diode D1 be separately connected the relay coil first end and the power supply, three pole
The emitter of pipe T1 connects the second end of the time delay module, when the triode T1 receives the first control signal, institute
Triode T1 disconnection is stated, so that the relay coil powers off；When the triode T1 receives the second control signal, institute
Triode T1 conducting is stated, so that the relay coil is powered.
7. control relay circuit according to claim 6, which is characterized in that the comparing unit includes operational amplifier
U1, the partial pressure unit include resistance R1 and resistance R2；
The operational amplifier U1 includes first input end, the second input terminal and output end, and the first input end is separately connected
The anode of the collector of the triode T1, the second end of the relay coil and the diode D1；The output end connects
Connect the first end of the second switch unit；
One end of the resistance R1 connects the power supply, the other end of the resistance R1 be separately connected the resistance R2 one end and
Second input terminal, the other end ground connection of the resistance R2.
8. control relay circuit according to claim 7, which is characterized in that the charge/discharge unit includes capacitor C1,
One end of the capacitor C1 is separately connected the output end of the operational amplifier U1 and the first end of the second switch unit, institute
State the other end ground connection of capacitor C1.
9. control relay circuit according to claim 8, which is characterized in that the second switch unit includes triode
T2, the base stage of the triode T2 connect the output end of the operational amplifier U1 and one end of the capacitor C1, three pole
The collector of pipe T2 is separately connected one end of the voltage regulation unit and the emitter of the triode T1, the hair of the triode T2
Emitter-base bandgap grading is separately connected the other end and ground of the voltage regulation unit.
10. control relay circuit according to claim 9, which is characterized in that the voltage regulation unit includes two pole of pressure stabilizing
Pipe ZD1, the anode of the zener diode ZD1 are separately connected the emitter of the triode T1 and the current collection of the triode T2
Pole, the cathode of the zener diode ZD1 are separately connected the emitter and ground of the triode T2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811582844.6A CN109494120B (en) | 2018-12-24 | 2018-12-24 | Relay control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811582844.6A CN109494120B (en) | 2018-12-24 | 2018-12-24 | Relay control circuit |
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| CN109494120A true CN109494120A (en) | 2019-03-19 |
| CN109494120B CN109494120B (en) | 2024-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811582844.6A Active CN109494120B (en) | 2018-12-24 | 2018-12-24 | Relay control circuit |
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| CN (1) | CN109494120B (en) |
Cited By (4)
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| CN112670960A (en) * | 2020-12-23 | 2021-04-16 | 北京北方华创微电子装备有限公司 | Power supply circuit, semiconductor processing equipment and power supply control method |
| CN112901468A (en) * | 2021-02-01 | 2021-06-04 | 北京北方华创微电子装备有限公司 | Control circuit, control method and semiconductor processing equipment |
| WO2021142705A1 (en) * | 2020-01-16 | 2021-07-22 | 深圳欣锐科技股份有限公司 | Circuit and method for controlling low power consumption of relay |
| CN114888499A (en) * | 2022-07-14 | 2022-08-12 | 广东阿达智能装备有限公司 | Dry reed relay protection and drive circuit for wire bonding machine |
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| CN114888499A (en) * | 2022-07-14 | 2022-08-12 | 广东阿达智能装备有限公司 | Dry reed relay protection and drive circuit for wire bonding machine |
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| CN109494120B (en) | 2024-05-31 |
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