CN108156681A - A kind of electromagnetic coil driving circuit - Google Patents
A kind of electromagnetic coil driving circuit Download PDFInfo
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- CN108156681A CN108156681A CN201711383498.4A CN201711383498A CN108156681A CN 108156681 A CN108156681 A CN 108156681A CN 201711383498 A CN201711383498 A CN 201711383498A CN 108156681 A CN108156681 A CN 108156681A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0202—Switches
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/36—Coil arrangements
Abstract
The invention discloses a kind of electromagnetic coil driving circuit, including EMI filter circuit, bridge rectifier, DC/DC reduction voltage circuits, detection circuit, control module and switching circuit；The EMI filter circuit is filtered the voltage for inputting electromagnetic coil driving circuit；The bridge rectifier through the filtered voltage of EMI filter circuit to carrying out rectification；The DC/DC reduction voltage circuits are depressured the voltage after bridge rectifier rectification；The size of voltage of the detection circuit detection after bridge rectifier rectification is simultaneously exported to control module；The control module controls whether control terminal of the output pwm signal to switching circuit according to the size of the voltage after bridge rectifier rectification；The switching circuit is modulated to export square-wave voltage signal to electromagnetic coil according to pwm signal to the voltage after the decompression of DC/DC reduction voltage circuits.The present invention has preferable EMI performances and can guarantee electromagnetic coil the operation is stable.
Description
Technical field
The present invention relates to field of circuit technology, particularly relate to a kind of electromagnetic coil driving circuit.
Background technology
Realize the work of solenoid valve or relay by applied voltage in the prior art, working method be in solenoid valve or
Plus voltage to generate the movement of magnetic force control solenoid valve, the operating voltage of electromagnetic coil needs to control at the electromagnetic coil both ends of relay
System is in certain level, if electromagnetic coil operating voltage value is higher, easily generates more heat transfer, increases the work of solenoid valve or relay
Make environment temperature, and then influence the stability and service life of solenoid valve and its peripheral parts, therefore people use a variety of methods
To reduce the operating current of solenoid valve, and then reduce the heat generated during electromagnetic valve work.
Setting metal-oxide-semiconductor module, a control module between power supply and electromagnetic coil is utilized in the prior art to pass through
Detection circuit detects the output voltage of power supply to control the duty ratio for the pwm signal for inputing to metal-oxide-semiconductor module, when power supply electricity
When the output voltage in source is higher, the duty of the pwm signal of control module output is smaller so that the work electricity of electromagnetic coil
Rheology is small, to reduce the power consumption of electromagnetic coil, avoids the fever of electromagnetic coil；This control mode can cause the suction of electromagnetic coil
With ability as the output voltage of power supply changes and changes, the operation is stable for causing electromagnetic coil is poor, and this control
The circuit of mode can so that the conduct radiation of electromagnetic coil is larger to power supply filtering, be extremely difficult to national standard.
Invention content
The purpose of the present invention is to provide a kind of existing electromagnetic coil driving circuit is overcome, for driving electromagnetic coil,
EMI performances are good and can be so that electromagnetic coil the operation is stable.
In order to achieve the above objectives, solution of the invention is：
A kind of electromagnetic coil driving circuit, including EMI filter circuit, bridge rectifier, DC/DC reduction voltage circuits, detection electricity
Road, control module and switching circuit；Wherein described EMI filter circuit, for inputting the electromagnetic coil driving circuit
Voltage be filtered；The bridge rectifier is connected with the output terminal of EMI filter circuit, for through EMI filter circuit
Filtered voltage carries out rectification；The DC/DC reduction voltage circuits, are connected with the output terminal of bridge rectifier, for through bridge
Voltage after formula rectifier circuit rectifies is depressured；The detection circuit is connected with the output terminal of bridge rectifier, for examining
Survey the size of the voltage after bridge rectifier rectification；The control module, with the output terminal of detection circuit and switch electricity
The control terminal on road is respectively connected with, and is fixed for the size according to the voltage after bridge rectifier rectification to control whether to export
The pwm signal of frequency is to the control terminal of switching circuit；The switching circuit is connected with the output terminal of DC/DC reduction voltage circuits, is used for
The voltage after the decompression of DC/DC reduction voltage circuits is modulated according to the pwm signal of control module to export square-wave voltage letter
Number give electromagnetic coil.
The electromagnetic coil driving circuit further includes LDO regulator circuits, the input terminal and DC/ of the LDO regulator circuits
The output terminal of DC reduction voltage circuits is connected, and the output terminal of the LDO regulator circuits is connected with the power end of control module.
The EMI filter circuit includes inductance L1, capacitance C1 and capacitance C2；It is filtered for the EMI one end of the inductance L1
The first input end of wave circuit, the other end of inductance L1 are the first output terminal of the EMI filter circuit, the one of the capacitance C1
End is connected with the first input end of the EMI filter circuit, and the other end of the capacitance C1 is the second of the EMI filter circuit
Input terminal, one end of the capacitance C2 are connected with the first output terminal of the EMI filter circuit, and the other end of the capacitance C1 is
The second output terminal of the EMI filter circuit, the other end of the capacitance C1 are connected with the other end of the capacitance C1.
The bridge rectifier includes diode D1, diode D2, diode D3 and diode D4, the diode
The anode of D1 and the cathode of diode D2 are connected with the first output terminal of the EMI filter circuit, and the cathode of diode D1 is institute
The output terminal of bridge rectifier is stated, the cathode of diode D1 is connected with the cathode of diode D4, the anode of diode D2 and two
The anode of pole pipe D3 is connected and is grounded；The cathode of diode D3 and the anode of diode D4 and the second of the EMI filter circuit
Output terminal is connected.
The DC/DC reduction voltage circuits include DC/DC decompression chips U1, resistance R1, resistance R2, resistance R3, resistance R4, capacitance
C3, capacitance C3A, capacitance C4, capacitance C5, capacitance C6, capacitance C7, inductance L2 and diode D5；One end of the capacitance C3, electricity
Hold one end of C3A and the VIN pins of DC/DC decompression chips U1 are connected with the output terminal of the bridge rectifier；DC/DC drops
The EN pins for pressing chip U1 are hanging, and the FREQ pins of DC/DC decompression chips U1 are connected with one end of resistance R1, DC/DC decompression cores
The BST pins of piece U1 are connected with one end of capacitance C5, the SW pins of DC/DC decompression chips U1 and the other end, two poles of capacitance C5
The cathode of pipe D5 and one end of inductance L2 are connected, the FB pins of DC/DC decompression chips U1 and one end and the resistance of resistance R4
One end of R3 is connected；The COMP pins of DC/DC decompression chips U1 are connected with one end of capacitance C4, the other end and resistance of capacitance C4
One end of R2 is connected, and the other end of inductance L2, the other end of resistance R4 are connected with one end of capacitance C6, and the other end of inductance L2 is
The output terminal of the DC/DC decompressions；The GND pin of DC/DC decompression chip U1, the other end of capacitance C3, capacitance C3A it is another
One end, the other end of resistance R1, the other end of resistance R2, the other end of resistance R3, the other end of capacitance C6 and diode D5
Plus earth.
The DC/DC reduction voltage circuits further include resistance R12, capacitance C41 and capacitance C7, one end of resistance R12 and two poles
The cathode of pipe D5 is connected, and the other end of resistance R12 is connected with one end of capacitance C41, the other end ground connection of capacitance C41；The electricity
The one end for holding C7 is connected with the COMP pins of DC/DC decompression chips U1, the other end ground connection of capacitance C7.
The detection circuit includes resistance R5, resistance R6 and capacitance C10；One end of the resistance R5 and bridge rectifier electricity
The output terminal on road is connected, and the other end of resistance R5 is connected with one end of capacitance C10 and one end of resistance R6 is connected；Capacitance C10
The other end of the other end and resistance R6 be grounded, the output terminal of the other end of resistance R5 as the detection circuit.
The output terminal of the detection circuit is connected by a resistance R7 with control module.
The switching circuit include NMOS tube Q1, NMOS tube Q2, diode D6, diode D7, resistance R8, resistance R9 and
Capacitance C12；The anode of diode D6 is connected with the cathode of diode D7 and the output terminal of DC/DC reduction voltage circuits, diode D6
Just extremely described switching circuit the first output terminal, the cathode of diode D6 is connected with one end of resistance R8, and resistance R8's is another
One end is connected with the grid of one end of resistance R9, one end of capacitance C12 and NMOS tube Q1；The other end and diode of resistance R9
The drain electrode of the anode of D7, the other end of capacitance C12, the source electrode of NMOS tube Q1 and NMOS tube Q2 is connected, the drain electrode of NMOS tube Q1
Second output terminal for the switching circuit；The grid of NMOS tube Q2 is connected with control module, and the grid of NMOS tube Q2 is described
The control terminal of switching circuit, the source electrode ground connection of NMOS tube Q2.
The switching circuit further includes zener diode ZD1, the cathode of zener diode ZD1 and the grid phase of NMOS tube Q1
Even, the anode of zener diode ZD1 is connected with the source electrode of NMOS tube Q1.
The grid of the NMOS tube Q2 is connected by a bleeder circuit with the control module；The bleeder circuit includes electricity
Resistance R10 and resistance R11, one end of the resistance R10 are connected with control module, the other end of resistance R10 and one end of resistance R11
And the grid of NMOS tube Q2 is connected, the other end ground connection of resistance R11.
The output terminal of the DC/DC reduction voltage circuits is connected by diode D8 with the anode of diode D6, diode D8's
Anode is connected with the output terminal of DC/DC reduction voltage circuits, and the cathode of diode D8 is connected with the anode of diode D6.
After using the above scheme, the present invention has the following advantages：
1st, this practicality is by setting bridge rectifier so that Alternating Current Power Supply and direct current supply, applicability may be used in the present invention
It is good；
2nd, the present invention is by setting EMI filter circuit so that EMI performances of the invention are good；
3rd, the present invention controls the control module to be by the size of voltage of the detection circuit detection after bridge rectifier rectification
The no pwm signal for exporting fixed frequency is to the control terminal of switching circuit so that the present invention can be in the voltage for being input to the present invention
When too high or too low, making control module, output pwm signal is not stopped to switching circuit, switching circuit, so as to have
Press defencive function and under-voltage protection function；
4th, the present invention is depressured the voltage after bridge rectifier rectification by DC/DC reduction voltage circuits, and control module
It is to export the pwm signal of fixed frequency to switching circuit, switching circuit through DC/DC then according to the pwm signal of control module to dropping
Voltage after volt circuit decompression is modulated to export square-wave voltage signal to electromagnetic coil, this causes square-wave voltage signal
Amplitude and duty ratio keep stablizing so that the suction of electromagnetic coil and ability are stablized, the work for allowing electromagnetic coil is steady
It is fixed.
Description of the drawings
Fig. 1 is the principle of the present invention block diagram
Fig. 2 is the circuit diagram of the present invention.
Specific embodiment
In order to further explain the technical solution of the present invention, the present invention is explained in detail below by specific embodiment
It states.
As depicted in figs. 1 and 2, a kind of electromagnetic coil driving circuit of the present invention, including EMI filter circuit, bridge rectifier electricity
Road, DC/DC reduction voltage circuits, detection circuit, control module and switching circuit.
Coordinate shown in Fig. 2, the EMI filter circuit, for input the voltage of the electromagnetic coil driving circuit into
Row filtering.Specifically, the EMI filter circuit tool, there are two input terminal and two output terminals, the EMI filter circuit includes electricity
Feel L1, capacitance C1 and capacitance C2；One end of the inductance L1 is the first input end of the EMI filter circuit, and inductance L1's is another
One end is the first output terminal of the EMI filter circuit；One end of the capacitance C1 and the first input of the EMI filter circuit
End is connected, and the other end of the capacitance C1 is the second input terminal of the EMI filter circuit, one end of the capacitance C2 with it is described
First output terminal of EMI filter circuit is connected, and the other end of the capacitance C1 is the second output terminal of the EMI filter circuit,
The other end of the capacitance C1 is connected with the other end of the capacitance C1.
The bridge rectifier is connected with the output terminal of EMI filter circuit, for after EMI filter circuit filters
Voltage carry out rectification.Specifically, the bridge rectifier includes diode D1, diode D2, diode D3 and two poles
Pipe D4, the anode of the diode D1 and the cathode of diode D2 are connected with the first output terminal of the EMI filter circuit, two poles
The cathode of pipe D1 is the output terminal of the bridge rectifier, and the cathode of diode D1 is connected with the cathode of diode D4, two poles
The anode of pipe D2 is connected and is grounded with the anode of diode D3；The cathode of diode D3 and the anode of diode D4 and the EMI
The second output terminal of filter circuit is connected；The bridge rectifier is not limited to include diode D1, diode D2, two poles
Pipe D3 and diode D4, the bridge rectifier can also be integrated rectifier bridge stacks.
The DC/DC reduction voltage circuits, are connected with the output terminal of bridge rectifier, for through bridge rectifier rectification
Voltage afterwards is depressured.Specifically, the DC/DC reduction voltage circuits include DC/DC decompression chips U1, resistance R1, resistance R2, electricity
Hinder R3, resistance R4, capacitance C3, capacitance C3A, capacitance C4, capacitance C5, capacitance C6, capacitance C7, inductance L2 and diode D5；Its
Described in the model of DC/DC decompressions chip U1 can be MP4560DN or MP4559DN or MP4558DN.The one of the capacitance C3
The VIN pins at end, one end of capacitance C3A and DC/DC decompression chips U1 are connected with the output terminal of the bridge rectifier；
The EN pins of DC/DC decompression chips U1 are hanging, and the FREQ pins of DC/DC decompression chips U1 are connected with one end of resistance R1, DC/DC
The BST pins of decompression chip U1 are connected with one end of capacitance C5, and DC/DC is depressured the another of the SW pins of chip U1 and capacitance C5
End, the cathode of diode D5 and inductance L2 one end be connected, the FB pins of DC/DC decompression chips U1 and one end of resistance R4 with
And one end of resistance R3 is connected；The COMP pins of DC/DC decompression chips U1 are connected with one end of capacitance C4, the other end of capacitance C4
It is connected with one end of resistance R2, the other end of inductance L2, the other end of resistance R4 are connected with one end of capacitance C6, and inductance L2's is another
One end is the output terminal of DC/DC decompressions；The GND pin of the DC/DC decompression chips U1, the other end, the capacitance of capacitance C3
The other end of C3A, the other end of resistance R1, the other end of resistance R2, the other end of resistance R3, capacitance C6 the other end and two
The plus earth of pole pipe D5.Further, the DC/DC reduction voltage circuits further include resistance R12 and capacitance C41, one end of resistance R12
It is connected with the cathode of diode D5, the other end of resistance R12 is connected with one end of capacitance C41, the other end ground connection of capacitance C41,
Diode D5 can be prevented due to excessive pressure damages with protection diode D5 by resistance R12 and capacitance C41.The DC/DC decompressions
One end that circuit also may also include capacitance C7, the capacitance C7 is connected with the COMP pins of DC/DC decompression chips U1, capacitance C7's
The other end is grounded.
The detection circuit is connected with the output terminal of bridge rectifier, for detecting after bridge rectifier rectification
Voltage size.Specifically, the detection circuit includes resistance R5, resistance R6 and capacitance C10；One end of the resistance R5
It is connected with the output terminal of bridge rectifier, the other end of resistance R5 is connected with one end of capacitance C10, one end phase of resistance R6
Even；The other end of capacitance C10 and the other end of resistance R6 are grounded, the output of the other end of resistance R5 as the detection circuit
End..
The control module is respectively connected with the output terminal of detection circuit and the control terminal of switching circuit, for basis
The size of voltage after bridge rectifier rectification controls whether to export control of the pwm signal to switching circuit of fixed frequency
End processed；The control module can be the microcontroller of built-in ADC converters, such as PIC12F1501-E, PIC12F683-E.It is described
Can connect a resistance R7 between the output terminal of detection circuit and control module, carry out current limliting by resistance R7 to protect control
Module.
The switching circuit is connected with the output terminal of DC/DC reduction voltage circuits, for the pwm signal pair according to control module
Voltage after the decompression of DC/DC reduction voltage circuits is modulated to export square-wave voltage signal.Specifically, the switching circuit packet
Include NMOS tube Q1, NMOS tube Q2, diode D6, diode D7, resistance R8, resistance R9 and capacitance C12；The anode of diode D6
It is connected with the cathode of diode D7 and the output terminal of DC/DC reduction voltage circuits, the just extremely described switching circuit of diode D6
First output terminal, the cathode of diode D6 are connected with one end of resistance R8, the other end of resistance R8 and one end of resistance R9, capacitance
One end of C12 and the grid of NMOS tube Q1 are connected；The anode of the other end of resistance R9 and diode D7, capacitance C12 it is another
The drain electrode at end, the source electrode of NMOS tube Q1 and NMOS tube Q2 is connected, and draining for NMOS tube Q1 is defeated for the second of the switching circuit
Outlet；The grid of NMOS tube Q2 is connected with control module, and the grid of NMOS tube Q2 is the control terminal of the switching circuit, NMOS tube
The source electrode ground connection of Q2.The grid of wherein described NMOS tube Q2 can be connected to protect by a bleeder circuit with the control module
NMOS tube Q2；The bleeder circuit includes resistance R10 and resistance R11, one end of the resistance R10 are connected with control module, electricity
The other end of resistance R10 is connected with the grid of resistance R11 and NMOS tube Q2, the other end ground connection of resistance R11.The DC/DC drops
The output terminal of volt circuit can be connected by diode D8 with the anode of diode D6, and anode and the DC/DC of diode D8 are depressured
The output terminal of circuit is connected, and the cathode of diode D8 is connected with the anode of diode D6, can be to avoid follow-up by diode D8
DC/DC reduction voltage circuits normal work is influenced during electromagnetic coil break-make.Further, the switching circuit may also include zener diode
The cathode of ZD1, zener diode ZD1 are connected with the grid of NMOS tube Q1, the anode of zener diode ZD1 and the source of NMOS tube Q1
Extremely it is connected, the grid voltage of NMOS tube Q1 can be controlled by zener diode ZD1, so as to protect NMOS tube Q1.
Further, the electromagnetic coil driving circuit further includes LDO regulator circuits, can by the LDO regulator circuits
To power to control module, the input terminal of the LDO regulator circuits is connected with the output terminal of DC/DC reduction voltage circuits, and the LDO is steady
The output terminal of volt circuit is connected with the power end of control module；Specifically, the LDO regulator circuits include LDO voltage stabilizing chips U2
With capacitance C9, the IN feet of LDO voltage stabilizing chips U2 are connected with the output terminal of DC/DC reduction voltage circuits, the OUT feet of LDO voltage stabilizing chips U2
It is connected with the power end of control module and one end of capacitance C9, the GND feet of voltage stabilizing chip U2 and the other end ground connection of capacitance C9,
Wherein LDO voltage stabilizing chips U2 can be with NCV51460-D or ZMR33Q.
When a kind of electromagnetic coil driving circuit of the present invention is implemented, the output voltage of power supply be input to after the present invention by
DC/DC reduction voltage circuits are inputted again after EMI filter circuit and bridge rectifier are filtered and after rectification, and control module passes through inspection
Slowdown monitoring circuit is detected the size of the voltage after bridge rectifier rectification, if the voltage after rectification is located at highest preset value
When between minimum predetermined value, control module then exports the pwm signal of fixed frequency so that switching circuit is started to work, and passes through at this time
Voltage after the decompression of DC/DC reduction voltage circuits is switched on and off output square-wave voltage signal after circuit is modulated and exports to electromagnetic wire
Circle；If voltage after rectification is more than highest preset value or during less than minimum predetermined value, control module not output pwm signal, switch
Circuit does not work, and entire circuit does not export.
After using the above scheme, the present invention has the following advantages：
1st, this practicality is by setting bridge rectifier so that Alternating Current Power Supply and direct current supply, applicability may be used in the present invention
It is good；
2nd, the present invention is by setting EMI filter circuit so that EMI performances of the invention are good；
3rd, the present invention controls the control module to be by the size of voltage of the detection circuit detection after bridge rectifier rectification
The no pwm signal for exporting fixed frequency is to the control terminal of switching circuit so that the present invention can be in the voltage for being input to the present invention
When too high or too low, making control module, output pwm signal is not stopped to switching circuit, switching circuit, so as to have
Press defencive function and under-voltage protection function；
4th, the present invention is depressured the voltage after bridge rectifier rectification by DC/DC reduction voltage circuits, and control module
It is to export the pwm signal of fixed frequency to switching circuit, switching circuit through DC/DC then according to the pwm signal of control module to dropping
Voltage after volt circuit decompression is modulated to export square-wave voltage signal to electromagnetic coil, this causes square-wave voltage signal
Amplitude and duty ratio keep stablizing so that the suction of electromagnetic coil and ability are stablized, the work for allowing electromagnetic coil is steady
It is fixed.
The product form and style of above-described embodiment and schema and the non-limiting present invention, any technical field it is common
The appropriate variation or modification that technical staff does it all should be regarded as not departing from the patent category of the present invention.
Claims (12)
1. a kind of electromagnetic coil driving circuit, it is characterised in that：Including EMI filter circuit, bridge rectifier, DC/DC decompressions
Circuit, detection circuit, control module and switching circuit；Wherein
The EMI filter circuit, for being filtered to the voltage for inputting the electromagnetic coil driving circuit；
The bridge rectifier is connected with the output terminal of EMI filter circuit, for through the filtered electricity of EMI filter circuit
Pressure carries out rectification；
The DC/DC reduction voltage circuits, are connected with the output terminal of bridge rectifier, for after bridge rectifier rectification
Voltage is depressured；
The detection circuit is connected with the output terminal of bridge rectifier, for detecting the electricity after bridge rectifier rectification
The size of pressure；
The control module is respectively connected with the output terminal of detection circuit and the control terminal of switching circuit, for according to through bridge
The size of voltage after formula rectifier circuit rectifies controls whether to export control of the pwm signal to switching circuit of fixed frequency
End；
The switching circuit is connected with the output terminal of DC/DC reduction voltage circuits, for according to the pwm signal of control module to through DC/
Voltage after the decompression of DC reduction voltage circuits is modulated to export square-wave voltage signal to electromagnetic coil.
2. electromagnetic coil driving circuit as described in claim 1, it is characterised in that：Further include LDO regulator circuits, the LDO
The input terminal of regulator circuit is connected with the output terminal of DC/DC reduction voltage circuits, the output terminal and control module of the LDO regulator circuits
Power end be connected.
3. electromagnetic coil driving circuit as described in claim 1, it is characterised in that：The EMI filter circuit include inductance L1,
Capacitance C1 and capacitance C2；One end of the inductance L1 is the first input end of the EMI filter circuit, and the other end of inductance L1 is
First output terminal of the EMI filter circuit, one end of the capacitance C1 and the first input end phase of the EMI filter circuit
Even, the other end of the capacitance C1 is the second input terminal of the EMI filter circuit, one end of the capacitance C2 and the EMI
First output terminal of filter circuit is connected, and the other end of the capacitance C1 is the second output terminal of the EMI filter circuit, described
The other end of capacitance C1 is connected with the other end of the capacitance C1.
4. electromagnetic coil driving circuit as described in claim 1, it is characterised in that：The bridge rectifier includes diode
D1, diode D2, diode D3 and diode D4, the anode of the diode D1 and the cathode of diode D2 and the EMI
First output terminal of filter circuit is connected, and the cathode of diode D1 is the output terminal of the bridge rectifier, diode D1's
Cathode is connected with the cathode of diode D4, and the anode of diode D2 is connected and is grounded with the anode of diode D3；Diode D3's
The anode of cathode and diode D4 are connected with the second output terminal of the EMI filter circuit.
5. electromagnetic coil driving circuit as described in claim 1, it is characterised in that：The DC/DC reduction voltage circuits include DC/DC
It is depressured chip U1, resistance R1, resistance R2, resistance R3, resistance R4, capacitance C3, capacitance C3A, capacitance C4, capacitance C5, capacitance C6, electricity
Hold C7, inductance L2 and diode D5；One end of the capacitance C3, one end of capacitance C3A and DC/DC are depressured chip U1's
VIN pins are connected with the output terminal of the bridge rectifier；The EN pins of DC/DC decompression chips U1 are hanging, DC/DC decompression cores
The FREQ pins of piece U1 are connected with one end of resistance R1, and the BST pins of DC/DC decompression chips U1 are connected with one end of capacitance C5,
The SW pins of DC/DC decompression chips U1 are connected with one end of the other end of capacitance C5, the cathode of diode D5 and inductance L2,
The FB pins of DC/DC decompression chips U1 are connected with one end of one end of resistance R4 and resistance R3；DC/DC decompression chips U1's
COMP pins are connected with one end of capacitance C4, and the other end of capacitance C4 is connected with one end of resistance R2, the other end, the electricity of inductance L2
The other end of resistance R4 is connected with one end of capacitance C6, and the other end of inductance L2 is the output terminal of DC/DC decompressions；The DC/
The GND pin of DC decompressions chip U1, the other end of capacitance C3, the other end of capacitance C3A, the other end of resistance R1, resistance R2
The other end, the other end of resistance R3, the other end of capacitance C6 and diode D5 plus earth.
6. electromagnetic coil driving circuit as claimed in claim 5, it is characterised in that：The DC/DC reduction voltage circuits further include electricity
One end of resistance R12, capacitance C41 and capacitance C7, resistance R12 are connected with the cathode of diode D5, the other end and the electricity of resistance R12
The one end for holding C41 is connected, the other end ground connection of capacitance C41；One end of the capacitance C7 and the COMP of DC/DC decompression chips U1 draw
Foot is connected, the other end ground connection of capacitance C7.
7. electromagnetic coil driving circuit as described in claim 1, it is characterised in that：The detection circuit includes resistance R5, electricity
Hinder R6 and capacitance C10；One end of the resistance R5 is connected with the output terminal of bridge rectifier, the other end and the electricity of resistance R5
One end of appearance C10 is connected and one end of resistance R6 is connected；The other end of capacitance C10 is grounded with the other end of resistance R6, resistance
Output terminal of the other end of R5 as the detection circuit.
8. electromagnetic coil driving circuit as claimed in claim 7, it is characterised in that：The output terminal of the detection circuit passes through one
Resistance R7 is connected with control module.
9. electromagnetic coil driving circuit as described in claim 1, it is characterised in that：The switching circuit include NMOS tube Q1,
NMOS tube Q2, diode D6, diode D7, resistance R8, resistance R9 and capacitance C12；The anode of diode D6 and diode D7
Cathode and the output terminals of DC/DC reduction voltage circuits be connected, the first output terminal of the just extremely described switching circuit of diode D6,
The cathode of diode D6 is connected with one end of resistance R8, the other end of resistance R8 and one end of resistance R9, capacitance C12 one end with
And the grid of NMOS tube Q1 is connected；The other end of resistance R9 and the anode of diode D7, the other end of capacitance C12, NMOS tube Q1
Source electrode and the drain electrode of NMOS tube Q2 be connected, the second output terminal of the drain electrode of NMOS tube Q1 for the switching circuit；NMOS tube
The grid of Q2 is connected with control module, and the grid of NMOS tube Q2 is the control terminal of the switching circuit, and the source electrode of NMOS tube Q2 connects
Ground.
10. electromagnetic coil driving circuit as claimed in claim 9, it is characterised in that：The switching circuit further includes voltage stabilizing two
The cathode of pole pipe ZD1, zener diode ZD1 are connected with the grid of NMOS tube Q1, anode and the NMOS tube Q1 of zener diode ZD1
Source electrode be connected.
11. electromagnetic coil driving circuit as claimed in claim 9, it is characterised in that：The grid of the NMOS tube Q2 passes through one
Bleeder circuit is connected with the control module；The bleeder circuit includes resistance R10 and resistance R11, one end of the resistance R10
It is connected with control module, the other end of resistance R10 is connected with the grid of one end of resistance R11 and NMOS tube Q2, resistance R11's
The other end is grounded.
12. electromagnetic coil driving circuit as claimed in claim 10, it is characterised in that：The output of the DC/DC reduction voltage circuits
End is connected by diode D8 with the anode of diode D6, and the anode of diode D8 is connected with the output terminal of DC/DC reduction voltage circuits,
The cathode of diode D8 is connected with the anode of diode D6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711383498.4A CN108156681B (en) | 2017-12-20 | 2017-12-20 | Electromagnetic coil driving circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711383498.4A CN108156681B (en) | 2017-12-20 | 2017-12-20 | Electromagnetic coil driving circuit |
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| Publication Number | Publication Date |
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| CN108156681A true CN108156681A (en) | 2018-06-12 |
| CN108156681B CN108156681B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711383498.4A Active CN108156681B (en) | 2017-12-20 | 2017-12-20 | Electromagnetic coil driving circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442130A (en) * | 2020-05-07 | 2020-07-24 | 浙江桃园智能科技有限公司 | Electromagnetic valve driving circuit |
| CN111769751A (en) * | 2020-05-15 | 2020-10-13 | 海信（山东）空调有限公司 | Direct current power supply circuit and air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104143915A (en) * | 2014-07-22 | 2014-11-12 | 南京国臣信息自动化技术有限公司 | Coil-type load voltage sag protection device |
| CN205781229U (en) * | 2016-04-27 | 2016-12-07 | 济南市大秦机电设备有限公司 | Electromagnetic valve coil power conditioning circuitry |
| CN207652717U (en) * | 2017-12-20 | 2018-07-24 | 厦门著赫电子科技有限公司 | A kind of electromagnetic coil driving circuit |
-
2017
- 2017-12-20 CN CN201711383498.4A patent/CN108156681B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104143915A (en) * | 2014-07-22 | 2014-11-12 | 南京国臣信息自动化技术有限公司 | Coil-type load voltage sag protection device |
| CN205781229U (en) * | 2016-04-27 | 2016-12-07 | 济南市大秦机电设备有限公司 | Electromagnetic valve coil power conditioning circuitry |
| CN207652717U (en) * | 2017-12-20 | 2018-07-24 | 厦门著赫电子科技有限公司 | A kind of electromagnetic coil driving circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442130A (en) * | 2020-05-07 | 2020-07-24 | 浙江桃园智能科技有限公司 | Electromagnetic valve driving circuit |
| CN111769751A (en) * | 2020-05-15 | 2020-10-13 | 海信（山东）空调有限公司 | Direct current power supply circuit and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108156681B (en) | 2023-10-20 |
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