CN217406170U - Drive protection circuit of switch valve and switch valve - Google Patents
Drive protection circuit of switch valve and switch valve Download PDFInfo
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- CN217406170U CN217406170U CN202220111385.9U CN202220111385U CN217406170U CN 217406170 U CN217406170 U CN 217406170U CN 202220111385 U CN202220111385 U CN 202220111385U CN 217406170 U CN217406170 U CN 217406170U
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Abstract
The embodiment of the utility model discloses drive protection circuit and ooff valve of ooff valve. The drive protection circuit of the switch valve comprises a power supply module, a voltage division module, a power supply acquisition module, a voltage comparison module and a high-side drive module; the voltage comparison module is respectively electrically connected with the voltage division module and the power supply acquisition module; the high-side driving module is electrically connected with the voltage comparison module and the switch valve respectively; the voltage division module is used for outputting a first voltage signal according to the power supply module; the power supply acquisition module is used for outputting a second voltage signal according to the power supply module; the voltage comparison module is used for outputting a control signal according to the first voltage signal and the second voltage signal; and the high-side driving module is used for controlling the on-off of the switch valve according to the control signal. The control switch valve can be controlled to be closed when the voltage is abnormal, and the control switch valve is switched on to recover the normal work of the circuit when the voltage is recovered to be normal, so that the switch valve and the protection circuit are protected from being damaged, and the drive control and the protection of the switch valve are realized.
Description
Technical Field
The embodiment of the utility model provides a relate to ooff valve drive control technical field, especially relate to a drive protection circuit and ooff valve of ooff valve.
Background
The vehicle-mounted electronic equipment is various in types, inductive loads such as an electromagnetic valve and an electric pump can be generally connected according to application requirements, and problems such as power supply overvoltage (for example, more than 36V), electromagnetic compatibility and current superposition can occur when a switch valve driving circuit of an oil tank oil way is connected to the inductive loads, so that a sampling resistor (current sampling of a switch valve motor) and the switch valve motor are easily burnt out.
The existing solution usually adopts the modes of adding a PTC (mainly low current, too low current to drive a load) and a TVS (mainly high power and large package) or adding a power resistor (mainly high power and large current) and a TVS (mainly high power and large package) and the like. However, in practical applications, a large current load occurs, and due to the compact mechanical structure of the switching valve, the selection of parameters of an electronic chip, the size of the PCB-Layout is greatly limited, and the like, the existing method cannot meet the requirements. Therefore, a reasonable driving control scheme is urgently needed to be designed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a drive protection circuit and ooff valve of ooff valve to the realization carries out drive control and protection to the ooff valve.
In a first aspect, an embodiment of the present invention provides a driving protection circuit of a switch valve, the driving protection circuit of the switch valve includes: the device comprises a power supply module, a voltage division module, a power supply acquisition module, a voltage comparison module and a high-side driving module; the power supply module is electrically connected with the voltage division module, the power supply acquisition module and the voltage comparison module; the voltage comparison module is electrically connected with the voltage division module and the power supply acquisition module respectively; the high-side driving module is electrically connected with the voltage comparison module and the switch valve respectively;
the voltage division module is used for outputting a first voltage signal according to the power supply module; the power supply acquisition module is used for outputting a second voltage signal according to the power supply module;
the voltage comparison module is used for outputting a control signal according to the first voltage signal and the second voltage signal; and the high-side driving module is used for controlling the on-off of the switch valve according to the control signal.
Optionally, the voltage comparison module at least comprises a comparator, and a first input end of the comparator is electrically connected with the voltage division module; the second input end of the comparator is electrically connected with the power supply acquisition module; and the output end of the comparator is electrically connected with the high-side driving module.
Optionally, the high-side driving module at least includes a first transistor and a second transistor, a control terminal of the first transistor is electrically connected to the voltage comparison module, a first terminal of the first transistor is electrically connected to a control terminal of the second transistor, and a second terminal of the first transistor is grounded; the first end of the second transistor is connected with a power supply end, and the second end of the second transistor is electrically connected with the switch valve.
Optionally, the driving protection circuit of the switching valve further includes an isolation module, and the isolation module is electrically connected to the voltage comparison module and the high-side driving module, respectively.
Optionally, the isolation module includes a first diode, and the first diode is electrically connected to the voltage comparison module and the high-side driving module, respectively.
Optionally, the voltage dividing module includes a first voltage dividing unit and a first capacitor, the first voltage dividing unit is electrically connected to the power supply module and the voltage comparing module, respectively, and the first capacitor is connected to the first voltage dividing unit in parallel.
Optionally, the power supply acquisition module includes a second voltage division unit and a second capacitor, the second voltage division unit is electrically connected to the power supply module and the voltage comparison module, respectively, and the second capacitor is connected to the second voltage division unit in parallel.
Optionally, the power supply module includes a power supply, a power supply processing unit and a voltage stabilizing unit, the power supply processing unit is respectively electrically connected to the power supply and the voltage stabilizing unit, the voltage stabilizing unit is respectively electrically connected to the voltage dividing module and the voltage comparing module, and the power supply processing unit is further electrically connected to the power supply collecting module.
Optionally, the driving protection circuit of the switching valve further includes a sampling resistor, and the sampling resistor is electrically connected to the high-side driving module and the switching valve, respectively.
In a second aspect, the present invention further provides a switch valve, which includes the drive protection circuit of the switch valve according to the first aspect.
The utility model provides a drive protection circuit of a switch valve and a switch valve, wherein the drive protection circuit of the switch valve comprises a power supply module, a voltage division module, a power supply acquisition module, a voltage comparison module and a high-side drive module; the power supply module is electrically connected with the voltage division module, the power supply acquisition module and the voltage comparison module; the voltage comparison module is respectively electrically connected with the voltage division module and the power supply acquisition module; the high-side driving module is electrically connected with the voltage comparison module and the switch valve respectively; the voltage division module is used for outputting a first voltage signal according to the power supply module; the power supply acquisition module is used for outputting a second voltage signal according to the power supply module; the voltage comparison module is used for outputting a control signal according to the first voltage signal and the second voltage signal; and the high-side driving module is used for controlling the on-off of the switch valve according to the control signal. It can be seen that the protection circuit can realize: through setting up partial pressure module, power supply collection module, voltage comparison module and high limit drive module, voltage comparison module judges whether voltage appears unusually according to the comparison of first voltage signal and second voltage signal to control the ooff valve and close when voltage is unusual, control the ooff valve and switch on with the normal work of recovery circuit when voltage recovery is normal, thereby protection ooff valve, protection circuit avoid damaging, realize drive control and protection to the ooff valve.
Drawings
Fig. 1 is a schematic structural diagram of a driving protection circuit of a switching valve according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a driving protection circuit of a switching valve according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of a driving protection circuit of a switching valve according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic structural diagram of a driving protection circuit of a switching valve provided in a first embodiment of the present invention. Referring to fig. 1, the driving protection circuit of the switching valve includes: the power supply system comprises a power supply module 10, a voltage division module 20, a power supply acquisition module 30, a voltage comparison module 40 and a high-side driving module 50; the power supply module 10 is electrically connected with the voltage dividing module 20, the power supply acquisition module 30 and the voltage comparison module 40; the voltage comparison module 40 is electrically connected with the voltage division module 20 and the power supply acquisition module 30 respectively; the high-side driving module 50 is electrically connected with the voltage comparison module 40 and the switch valve 1 respectively;
the voltage dividing module 20 is configured to output a first voltage signal according to the power supply module 10; the power supply acquisition module 30 is configured to output a second voltage signal according to the power supply module 10;
the voltage comparison module 40 is configured to output a control signal according to the first voltage signal and the second voltage signal; the high-side driving module 50 is used for controlling the on-off of the switch valve 1 according to the control signal.
The power supply module 10 is configured to output a power supply voltage and provide the power supply voltage for the driving protection circuit. Since many inductive loads are often disposed on the power supply terminal or the power supply line, a counter electromotive force is generated, which easily causes an abnormality in the voltage output by the power supply module 10. The voltage dividing module 20 is configured to divide the power supply voltage output by the power supply module 10 and output a stable first voltage signal to the voltage comparing module 40. The power supply collecting module 30 is configured to collect and obtain a power supply voltage output by the power supply module 10 and output the power supply voltage as a second voltage signal to the voltage comparing module 40. No matter whether the power supply voltage output by the power supply module 10 is normal or abnormal, the first voltage signal output by the voltage dividing module 20 is a stable voltage signal, and is used as a reference voltage of the voltage comparing module 40; since the power supply collecting module 30 directly collects the voltage output by the power supply module 10, since a plurality of inductive loads are usually disposed on the power supply terminal or the power supply line, the inductive loads generate back electromotive force, which easily causes unstable voltage, abnormal voltage, and the like, and the second voltage signal generates an unstable voltage signal. Therefore, under the normal condition of the voltage, the voltage value of the first voltage signal is larger than that of the second voltage signal; when the voltage is abnormal, the voltage value of the second voltage signal is larger than that of the first voltage signal. The voltage comparison module 40 compares the first voltage signal with the second voltage signal and outputs a control signal to the high-side driving module 50. The high-side driving module 50 controls the on/off of the switch valve 1 according to the control signal.
The control signal may be a high level signal or a low level signal. Illustratively, when the voltage is normal, the voltage value of the first voltage signal is greater than the voltage value of the second voltage signal, the voltage comparison module 40 outputs a high-level control signal to the high-side driving module 50, and the high-side driving module 50 controls the switch valve 1 to be turned on according to the high-level control signal; when the voltage is abnormal, the voltage value of the first voltage signal is smaller than the voltage value of the second voltage signal, the voltage comparison module 40 outputs a low level control signal to the high side driving module 50, and the high side driving module 50 controls the switch valve 1 to close according to the low level control signal. It should be noted that, whether the on-off valve is opened or closed when the control signal is a high level signal may be set according to actual conditions, and is not limited specifically herein.
In the technical scheme of this embodiment, the implementation process of the drive protection circuit of the switching valve is as follows: referring to fig. 1, a power supply module 10 outputs a power supply voltage; the voltage dividing module 20 outputs the power supply voltage output by the power supply module 10 to the voltage comparison module 40 as a stable first voltage signal, which is used as a reference voltage of the voltage comparison module 40; the power supply collecting module 30 collects and obtains the power supply voltage output by the power supply module 10 and outputs the power supply voltage as a second voltage signal to the voltage comparing module 40. When the voltage value of the first voltage signal is greater than that of the second voltage signal, which indicates that the voltage is normal at this time, the voltage comparison module 40 outputs a high-level control signal to the high-side driving module 50, the high-side driving module 50 controls the switch valve 1 to be switched on according to the high-level control signal, and the circuit works normally; when the voltage value of the first voltage signal is smaller than that of the second voltage signal, which indicates that the voltage is abnormal, the voltage comparison module 40 outputs a low-level control signal to the high-side driving module 50, the high-side driving module 50 controls the switch valve 1 to be closed according to the low-level control signal, the circuit does not work, and the circuit enters a protection state; when the voltage value of the first voltage signal is greater than the voltage value of the second voltage signal again, which indicates that the voltage is restored to normal, the voltage comparison module 40 outputs a high-level control signal to the high-side driving module 50, the high-side driving module 50 controls the switch valve 1 to be turned on again according to the high-level control signal, and the circuit is restored to normal operation. Therefore, the drive protection circuit can judge whether the voltage is abnormal according to the first voltage signal and the second voltage signal, control the switch valve 1 to be closed when the voltage is abnormal, and control the switch valve 1 to conduct the normal work of the recovery circuit when the voltage is recovered to be normal, so that the switch valve and the protection circuit are protected from being damaged, and the drive control and the protection of the switch valve are realized.
According to the technical scheme of the embodiment, the driving protection circuit of the switch valve is provided and comprises a power supply module, a voltage division module, a power supply acquisition module, a voltage comparison module and a high-side driving module; the power supply module is electrically connected with the voltage division module, the power supply acquisition module and the voltage comparison module; the voltage comparison module is respectively electrically connected with the voltage division module and the power supply acquisition module; the high-side driving module is electrically connected with the voltage comparison module and the switch valve respectively; the voltage division module is used for outputting a first voltage signal according to the power supply module; the power supply acquisition module is used for outputting a second voltage signal according to the power supply module; the voltage comparison module is used for outputting a control signal according to the first voltage signal and the second voltage signal; and the high-side driving module is used for controlling the on-off of the switch valve according to the control signal. It can be seen that the protection circuit can realize: through setting up partial pressure module, power supply collection module, voltage comparison module and high limit drive module, voltage comparison module judges whether voltage appears unusually according to the comparison of first voltage signal and second voltage signal to control the ooff valve and close when voltage is unusual, control the ooff valve and switch on with the normal work of recovery circuit when voltage recovery is normal, thereby protection ooff valve, protection circuit avoid damaging, realize drive control and protection to the ooff valve.
Example two
Fig. 2 is a schematic structural diagram of a driving protection circuit of a switch valve provided in the second embodiment of the present invention, and fig. 3 is a schematic diagram of a driving protection circuit of a switch valve provided in the second embodiment of the present invention. On the basis of the first embodiment, optionally, referring to fig. 2 and fig. 3, the voltage comparison module 40 at least includes a comparator B0, and a first input terminal of the comparator B0 is electrically connected to the voltage division module 20; a second input end of the comparator B0 is electrically connected with the power supply acquisition module 30; the output of comparator B0 is electrically connected to the high side driver module 50.
The first input end of the comparator B0 is a non-inverting end, the second input end is an inverting end, and the voltage divider module 20 outputs a stable first voltage signal to the non-inverting end for being used as a reference voltage of the comparator B0; the second voltage signal output by the power supply collection module 30 is input to the inverting terminal. When the voltage value of the first voltage signal is greater than that of the second voltage signal, which indicates that the voltage is normal at this time, the output end of the comparator B0 outputs a high level signal, and the high-side driving module 50 controls the switch valve 1 to be turned on according to the high level signal; when the voltage value of the first voltage signal is smaller than that of the second voltage signal, which indicates that the voltage is abnormal at this time, the output end of the comparator B0 outputs a low level signal, and the high-side driving module 50 controls the switch valve 1 to be closed according to the low level signal; when the voltage value of the first voltage signal is greater than the voltage value of the second voltage signal again, which indicates that the voltage is restored to normal, the output end of the comparator B0 outputs a high level signal, and the high-side driving module 50 controls the switch valve 1 to be turned on according to the high level signal.
Alternatively, referring to fig. 3, the high-side driving module 50 at least includes a first transistor Q1 and a second transistor Q2, a control terminal of the first transistor Q1 is electrically connected to the voltage comparing module 40, a first terminal of the first transistor Q1 is electrically connected to a control terminal of the second transistor Q2, and a second terminal of the first transistor Q1 is grounded; a first terminal of the second transistor Q2 is connected to the power terminal VCC, and a second terminal of the second transistor Q2 is electrically connected to the switch valve 1.
The first transistor Q1 and the second transistor Q2 may be transistors or MOS transistors. The first transistor Q1 may be a PNP transistor or an NPN transistor. Similarly, the second transistor Q2 may be a PNP transistor or an NPN transistor. Specifically, the first transistor Q1 is a triode, and the second transistor Q2 is a switch tube. It should be noted that the type of the transistor may be set according to actual conditions, and is not specifically limited herein.
Specifically, when the voltage value of the first voltage signal is greater than the voltage value of the second voltage signal, which indicates that the voltage is normal at this time, the output end of the comparator B0 outputs a high level signal, the high level signal turns on the first transistor Q1, the level of the control electrode Q2 is pulled low after the first transistor Q1 is turned on, so that the second transistor Q2 is turned on, the second transistor Q2 is turned on, so that the switch valve 1 is turned on, and the circuit operates normally; when the voltage value of the first voltage signal is smaller than that of the second voltage signal, which indicates that the voltage is abnormal at this time, the output end of the comparator B0 outputs a low level signal, the low level signal turns off the transistor Q1, the level of the control electrode of the transistor Q2 is pulled high, so that the transistor Q2 is turned off, the transistor Q2 is turned off, so that the switch valve 1 is powered off, and the circuit does not work and enters a protection state; when the voltage value of the first voltage signal is greater than that of the second voltage signal again, which indicates that the voltage is restored to normal, the output end of the comparator B0 outputs a high level signal, the high level signal turns on the first transistor Q1, the control electrode of the transistor Q2 is pulled low after the first transistor Q1 is turned on, the second transistor Q2 is turned on, the second transistor Q2 is turned on, the switch valve 1 is turned on again, and the circuit is restored to normal operation. Therefore, the switching valve 1 can be controlled to be closed when the voltage is abnormal, and the switching valve 1 is controlled to be switched on to recover the normal work of the circuit when the voltage is recovered to be normal, so that the switching valve and the protection circuit are protected and prevented from being damaged.
In addition, referring to fig. 3, the high-side driving module 50 further includes a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a fourth capacitor C4, wherein the sixth resistor R6 is used for dividing voltage and limiting current; the seventh resistor R7, the eighth resistor R8 and the fourth capacitor C4 act as a bias.
Optionally, referring to fig. 2 and 3, the driving protection circuit of the switching valve further includes an isolation module 60, and the isolation module 60 is electrically connected to the voltage comparison module 40 and the high-side driving module 50, respectively.
Since the high-side driving module 50 may also generate abnormal voltage, in order to prevent the abnormal voltage from being reversely injected into the voltage comparing module 40, an isolating module 60 is disposed between the voltage comparing module 40 and the high-side driving module 50, and is used for controlling the voltage comparing module 40 and the high-side driving module 50 to be in one-way conduction, so as to prevent the abnormal voltage of the high-side driving module 50 from being reversely injected into the voltage comparing module 40, thereby playing a role in protection.
Alternatively, referring to fig. 3, the isolation module 60 includes a first diode D1, the first diode D1 being electrically connected with the voltage comparison module 40 and the high side driving module 50, respectively.
The first diode D1 is an anti-reverse diode, and is used to control the unidirectional conduction of the voltage comparison module 40 and the high-side driving module 50, and prevent the abnormal voltage of the high-side driving module 50 from being reversely injected into the voltage comparison module 40, so as to play a role in protection.
In addition, referring to fig. 3, the isolation module 60 further includes a fifth resistor R5 and a third capacitor C3, and the fifth resistor R5 and the third capacitor C3 play a pull-up role.
Alternatively, referring to fig. 3, the voltage dividing module 20 includes a first voltage dividing unit electrically connected to the power supply module 10 and the voltage comparing module 40, and a first capacitor C1 connected in parallel with the first voltage dividing unit.
The first voltage division unit comprises a first resistor R1 and a second resistor R2, the first resistor R1 is electrically connected with the power supply module 10, the second resistor R2 is connected with the first resistor R1 in series, the series connection point of the first resistor R2 and the second resistor R2 is electrically connected with the same-phase end of the comparator B0, and the first resistor R1 and the second resistor R2 are used for dividing the power supply voltage output by the power supply module 10, outputting a stable first voltage signal and inputting the stable first voltage signal to the same-phase end of the comparator B0; the first capacitor C1 is connected in parallel across the second resistor R2 for filtering.
Alternatively, referring to fig. 3, the power supply collection module 30 includes a second voltage dividing unit electrically connected to the power supply module 10 and the voltage comparison module 40, respectively, and a second capacitor C2 connected in parallel to the second voltage dividing unit and the second capacitor C2.
The second voltage division unit comprises a third resistor R3 and a fourth resistor R4, the third resistor R3 is electrically connected with the power supply module 10, the third resistor R3 and the fourth resistor R4 are connected in series, the series connection point of the third resistor R3 and the fourth resistor R4 is electrically connected with the inverting terminal of the comparator B0, and the third resistor R3 and the fourth resistor R4 are used for acquiring and acquiring the power supply voltage output by the power supply module 10 and inputting the power supply voltage as a second voltage signal to the inverting terminal of the comparator B0.
The second capacitor C2 is connected in parallel across the fourth resistor R4 for filtering.
Alternatively, referring to fig. 2 and 3, the power supply module 10 includes a power supply 11, a power supply processing unit 12 and a voltage stabilizing unit 13, the power supply processing unit 12 is electrically connected to the power supply 11 and the voltage stabilizing unit 13, the voltage stabilizing unit 13 is electrically connected to the voltage dividing module 20 and the voltage comparing module 40, and the power supply processing unit 12 is further electrically connected to the power supply collecting module 30.
The power supply 11 may be a rechargeable lithium battery, and specifically, the power supply 11 is a storage battery. The power processing unit 12 is used for filtering the voltage output by the power supply 11. The voltage stabilizing unit 13 is configured to step down and stabilize the voltage output by the power supply processing unit 12, and then output the voltage. The voltage stabilizing unit 13 may be a voltage stabilizer. Since other inductive loads are further disposed between the power source 11 and the power processing unit 12, a voltage abnormal condition may occur, and thus the voltage signal output by the power processing unit 12 is usually unstable, so that the second voltage signal acquired by the power supply acquisition module 30 (i.e., the third resistor R3 and the fourth resistor R4) is unstable.
The power processing unit 12 is electrically connected to the third resistor R3, and the third resistor R3 and the fourth resistor R4 are configured to acquire the voltage output by the power processing unit 12 and output the acquired voltage as a second voltage signal to the inverting terminal of the comparator B0; the voltage stabilizing unit 13 is electrically connected to the first resistor R1, and the first resistor R1 and the second resistor R2 are configured to divide the supply voltage output by the power supply module 10 and output a stable first voltage signal to the non-inverting terminal of the comparator B0.
The resistances of the first resistor R1 and the second resistor R2 may be the same or different, and the resistances of the third resistor R3 and the fourth resistor R4 may be the same or different, but the resistances of the first resistor R1 and the second resistor R2 may not be the same as the resistances of the third resistor R3 and the fourth resistor R4. It should be noted that, the specific resistance selection is related to the voltage actually required by the circuit, and may be set according to the actual situation, which is not limited herein.
Optionally, referring to fig. 3, the driving protection circuit of the switching valve further includes a sampling resistor R0, and the sampling resistor R0 is electrically connected to the high-side driving module 50 and the switching valve 1, respectively.
The sampling resistor R0 is used to collect the voltage of the switching valve 1.
Specifically, when the voltage value of the first voltage signal is greater than the voltage value of the second voltage signal, which indicates that the voltage is normal at this time, the output end of the comparator B0 outputs a high level signal, the high-side driving module 50 controls the switch valve 1 to be turned on according to the high level signal, and the sampling resistor R0 can normally collect the voltage; when the voltage value of the first voltage signal is smaller than that of the second voltage signal, which indicates that the voltage is abnormal at this time, the output end of the comparator B0 outputs a low level signal, the high-side driving module 50 controls the switch valve 1 to be closed according to the low level signal, and at this time, the sampling resistor R0 and the switch valve 1 enter a protected state; when the voltage value of the first voltage signal is greater than the voltage value of the second voltage signal again, which indicates that the voltage is recovered to be normal, the output end of the comparator B0 outputs a high level signal, the high-side driving module 50 controls the switch valve 1 to be turned on according to the high level signal, and the sampling resistor R0 recovers to be normal collection.
Therefore, the control switch valve 1 can be controlled to be closed when the voltage is abnormal, the switch valve 1 and the sampling resistor R0 are protected, the switch valve 1 is controlled to be switched on to restore the normal work of the circuit when the voltage is restored to be normal, the normal collection of the sampling resistor R0 is restored, and the switch valve 1 and the sampling resistor R0 are prevented from being damaged due to the quick response of the protection circuit and are protected.
EXAMPLE III
An embodiment of the utility model provides a switch valve is provided in three, this switch valve includes the utility model discloses arbitrary embodiment the drive protection circuit of switch valve.
The switch valve can be applied to an oil circuit of a vehicle-mounted high-voltage and high-current oil tank and used for controlling the opening or closing of the oil circuit of the oil tank.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A drive protection circuit of a switching valve, comprising: the device comprises a power supply module, a voltage division module, a power supply acquisition module, a voltage comparison module and a high-side driving module; the power supply module is electrically connected with the voltage division module, the power supply acquisition module and the voltage comparison module; the voltage comparison module is electrically connected with the voltage division module and the power supply acquisition module respectively; the high-side driving module is electrically connected with the voltage comparison module and the switch valve respectively;
the voltage division module is used for outputting a first voltage signal according to the power supply module; the power supply acquisition module is used for outputting a second voltage signal according to the power supply module;
the voltage comparison module is used for outputting a control signal according to the first voltage signal and the second voltage signal; and the high-side driving module is used for controlling the on-off of the switch valve according to the control signal.
2. The driving protection circuit of the switch valve according to claim 1, wherein the voltage comparison module comprises at least a comparator, and a first input end of the comparator is electrically connected with the voltage division module; the second input end of the comparator is electrically connected with the power supply acquisition module; and the output end of the comparator is electrically connected with the high-side driving module.
3. The driving protection circuit of the switch valve according to claim 1, wherein the high-side driving module comprises at least a first transistor and a second transistor, a control terminal of the first transistor is electrically connected to the voltage comparison module, a first terminal of the first transistor is electrically connected to a control terminal of the second transistor, and a second terminal of the first transistor is grounded; the first end of the second transistor is connected with a power supply end, and the second end of the second transistor is electrically connected with the switch valve.
4. The driving protection circuit of the switch valve according to claim 1, further comprising an isolation module electrically connected to the voltage comparison module and the high side driving module, respectively.
5. The driving protection circuit of the switch valve according to claim 4, wherein the isolation module comprises a first diode, and the first diode is electrically connected with the voltage comparison module and the high-side driving module respectively.
6. The driving protection circuit of the switch valve according to claim 1, wherein the voltage dividing module comprises a first voltage dividing unit and a first capacitor, the first voltage dividing unit is electrically connected to the power supply module and the voltage comparison module respectively, and the first capacitor is connected to the first voltage dividing unit in parallel.
7. The driving protection circuit of the switch valve according to claim 1, wherein the power supply collection module comprises a second voltage division unit and a second capacitor, the second voltage division unit is electrically connected with the power supply module and the voltage comparison module respectively, and the second capacitor is connected with the second voltage division unit in parallel.
8. The driving protection circuit of the switch valve according to claim 1, wherein the power supply module comprises a power supply, a power supply processing unit and a voltage stabilizing unit, the power supply processing unit is electrically connected with the power supply and the voltage stabilizing unit respectively, the voltage stabilizing unit is electrically connected with the voltage dividing module and the voltage comparing module respectively, and the power supply processing unit is further electrically connected with the power supply collecting module.
9. The driving protection circuit of the switch valve according to claim 1, further comprising a sampling resistor electrically connected to the high side driving module and the switch valve, respectively.
10. A switching valve comprising a drive protection circuit of the switching valve according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220111385.9U CN217406170U (en) | 2022-01-17 | 2022-01-17 | Drive protection circuit of switch valve and switch valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220111385.9U CN217406170U (en) | 2022-01-17 | 2022-01-17 | Drive protection circuit of switch valve and switch valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217406170U true CN217406170U (en) | 2022-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220111385.9U Active CN217406170U (en) | 2022-01-17 | 2022-01-17 | Drive protection circuit of switch valve and switch valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217406170U (en) |
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2022
- 2022-01-17 CN CN202220111385.9U patent/CN217406170U/en active Active
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Address after: Room 101, No. 1, East Ring 3rd Street, Jitiagang, Huangjiang Town, Dongguan City, Guangdong Province, 523000 Patentee after: Guangdong Zhengyang Sensor Technology Co.,Ltd. Address before: Jitigang village, Huangjiang Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN ZHENGYANG ELECTRONIC MECHANICAL Co.,Ltd. |