CN209800830U - Electromagnetic drive circuit and electronic equipment - Google Patents
Electromagnetic drive circuit and electronic equipment Download PDFInfo
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- CN209800830U CN209800830U CN201920460753.9U CN201920460753U CN209800830U CN 209800830 U CN209800830 U CN 209800830U CN 201920460753 U CN201920460753 U CN 201920460753U CN 209800830 U CN209800830 U CN 209800830U
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Abstract
The utility model provides an electromagnetic drive circuit and electronic equipment relates to automatically controlled technical field. The electromagnetic driving circuit comprises a controller and a first switch unit, wherein the controller is electrically connected with the first switch unit, and the first switch unit is electrically connected with the electromagnetic valve; the controller is used for sending a first control signal to the first switch unit when the electromagnetic valve is opened; the first switch unit is used for providing a first current signal for the electromagnetic valve according to a first control signal; the controller is also used for sending a second control signal to the first switch unit after the electromagnetic valve is opened; the first switch unit is further used for providing a second current signal to the electromagnetic valve according to a second control signal so as to enable the electromagnetic valve to maintain an opening state. The electromagnetic driving circuit can provide larger electric energy when an electromagnetic valve of the electronic equipment is opened, so that the electromagnetic valve is quickly opened; after the electromagnetic valve is opened, less electric energy is provided to maintain the electromagnetic valve in an opening state, and therefore the functions of quick opening and energy saving are achieved.
Description
Technical Field
The utility model relates to an automatically controlled technical field particularly, relates to an electromagnetic drive circuit and electronic equipment.
Background
With the rapid development and wide application of robotics, the requirements for the driving reliability and speed of the solenoid valve are greatly increased. The electromagnetic valve is equivalent to an electrically controlled one-way valve in structure, and when the electromagnetic valve is electrified, an electromagnetic coil of the electromagnetic valve generates electromagnetic force, so that a valve core of the electromagnetic valve is sucked up, and the electromagnetic valve is opened. Therefore, when the electromagnetic valve is opened quickly, the electromagnetic valve converts electric energy as much as possible into electromagnetic force, but after the valve core is sucked up and the electromagnetic valve is opened, work is done, only a small amount of energy is needed to keep the suction force. Therefore, a driving circuit capable of realizing quick opening of the electromagnetic valve and saving energy is urgently needed.
SUMMERY OF THE UTILITY MODEL
the utility model aims at providing an electromagnetic drive circuit and an electronic device, the electromagnetic drive circuit can provide larger electric energy when the electromagnetic valve of the electronic device is opened, so that the electromagnetic valve is quickly opened; after the electromagnetic valve is opened, less electric energy is provided to maintain the opening of the electromagnetic valve, and therefore the functions of quick opening and energy saving are achieved.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
In a first aspect, an embodiment of the present invention provides an electromagnetic driving circuit, including a controller and a first switch unit, where the controller is electrically connected to the first switch unit, and the first switch unit is electrically connected to an electromagnetic valve; the controller is used for sending a first control signal to the first switch unit when the electromagnetic valve is opened; the first switch unit is used for providing a first current signal for the electromagnetic valve according to a first control signal; the controller is also used for sending a second control signal to the first switch unit after the electromagnetic valve is opened; the first switch unit is further used for providing a second current signal to the electromagnetic valve according to a second control signal so as to enable the electromagnetic valve to maintain an opening state.
Furthermore, the first switch unit comprises a first switch tube, the first switch tube comprises a first pin, a second pin and a third pin, the first pin is electrically connected with the controller, the second pin is electrically connected with the solenoid valve, and the third pin is grounded.
Furthermore, the electromagnetic driving circuit also comprises a feedback unit, the feedback unit is electrically connected with the controller, and the feedback unit is also electrically connected with the electromagnetic valve through a first switch unit; the feedback unit is used for acquiring the first current signal or the second current signal and transmitting the first current signal or the second current signal to the controller; the controller is also used for judging whether the electromagnetic valve is short-circuited according to the first current signal or the second current signal and controlling the first switch unit to be switched off when the electromagnetic valve is short-circuited; the controller is also used for adjusting the duty ratio of the second control signal according to the second current signal so as to adjust the power of the electromagnetic valve.
Furthermore, the feedback unit comprises a first resistor, one end of the first resistor is electrically connected with the first switch unit and the controller, and the other end of the first resistor is grounded.
Furthermore, the feedback unit further comprises a second resistor, and one end of the first resistor is electrically connected with the controller through the second resistor.
Furthermore, the electromagnetic drive circuit also comprises a follow current unit which is electrically connected with the electromagnetic valve, the controller and the first switch unit.
Furthermore, the follow current unit comprises a second switch tube and a first diode, the second switch tube comprises a fourth pin, a fifth pin and a sixth pin, the fourth pin is electrically connected with the controller, the fifth pin is electrically connected with one end of the electromagnetic valve, the sixth pin is electrically connected with the cathode of the first diode, and the anode of the first diode is electrically connected with the other end of the electromagnetic valve and the first switch unit.
Furthermore, the electromagnetic driving circuit further comprises a protection unit, one end of the protection unit is electrically connected with the first pin, and the other end of the protection unit is electrically connected with the second pin.
Furthermore, the protection unit comprises a second diode and a voltage stabilizing diode, wherein the anode of the second diode is electrically connected with the second pin, the cathode of the second diode is electrically connected with the cathode of the voltage stabilizing diode, and the anode of the voltage stabilizing diode is electrically connected with the first pin.
In a second aspect, an embodiment of the present invention provides an electronic device, including a solenoid valve and an electromagnetic driving circuit, where the electromagnetic driving circuit includes a controller and a first switch unit, the controller is electrically connected to the first switch unit, and the first switch unit is electrically connected to the solenoid valve; the controller is used for sending a first control signal to the first switch unit when the electromagnetic valve is opened; the first switch unit is used for providing a first current signal for the electromagnetic valve according to a first control signal; the controller is also used for sending a second control signal to the first switch unit after the electromagnetic valve is opened; the first switch unit is further used for providing a second current signal to the electromagnetic valve according to a second control signal so as to enable the electromagnetic valve to maintain an opening state.
The utility model provides an electromagnetic drive circuit and electronic equipment's beneficial effect is: the electromagnetic driving circuit comprises a controller and a first switch unit, wherein the controller is electrically connected with the first switch unit, and the first switch unit is electrically connected with the electromagnetic valve; when the electromagnetic valve is opened, the controller sends a first control signal to the first switch unit; the first switch unit provides a first current signal to the electromagnetic valve according to a first control signal; the first switch sends a second control signal to the first switch unit after the electromagnetic valve is opened; the first switch unit provides a second current signal to the electromagnetic valve according to a second control signal so as to keep the electromagnetic valve in an opening state. Therefore, when the electromagnetic valve is opened, the electromagnetic driving circuit provides a larger first current signal to the electromagnetic valve, so that the electromagnetic valve can be quickly opened; after the electromagnetic valve is opened, the electromagnetic driving circuit provides a smaller second current signal for the electromagnetic valve, so that the electromagnetic valve can maintain the opening state with smaller electric energy. The speed of the electromagnetic valve is increased, the reliability of the electromagnetic valve is improved, and energy is saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a block diagram of an electronic device provided by the present invention;
Fig. 2 is a block diagram of a first electromagnetic driving circuit provided by the present invention;
FIG. 3 is a schematic circuit diagram of a first switching unit of the electromagnetic drive circuit of FIG. 2;
fig. 4 is a block diagram of a second electromagnetic driving circuit provided by the present invention;
FIG. 5 is a circuit schematic of the electromagnetic drive circuit provided in FIG. 4;
Fig. 6 is a schematic diagram of a control signal and a current signal of the electromagnetic driving circuit provided by the present invention.
Icon: 1-an electronic device; 10-an electromagnetic drive circuit; 11-a controller; 12-a first switching unit; 13-a feedback unit; 14-a freewheel unit; 15-a protection unit; 20-an electromagnetic valve; 30-a power supply; q1-first switch tube; q2-second switch tube; r1 — first resistance; r2 — second resistance; r3 — third resistance; r4-fourth resistor; d1 — first diode; d2 — second diode; d3-zener diode; c1-capacitance; l1-electromagnetic coil.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and for simplicity of description, and do not indicate or imply that the equipment or components that are referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically connected or connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
Referring to fig. 1, which is a block diagram of an electronic device 1 according to an embodiment of the present invention, the electronic device 1 includes a solenoid valve 20 and an electromagnetic driving circuit 10, the solenoid valve 20 is electrically connected to the electromagnetic driving circuit 10, and the electromagnetic driving circuit 10 is configured to provide a first current signal to the solenoid valve 20 when the solenoid valve 20 is opened, so that the solenoid valve 20 can be quickly opened; the electromagnetic drive circuit 10 is configured to provide a second current signal to the solenoid valve 20 after the solenoid valve 20 is opened, so that the solenoid valve 20 can maintain an open state with less power. Wherein the first current signal is greater than the second current signal.
Further, in the present embodiment, the electronic device 1 further includes a power supply 30, the power supply 30 is electrically connected to the solenoid valve 20, and the power supply 30 is configured to provide an operating voltage to the solenoid valve 20.
In the present embodiment, the electronic apparatus 1 may be, but is not limited to, a robot.
referring to fig. 2, which is a block diagram of an implementable structure of the electromagnetic driving circuit 10 in fig. 1, the electromagnetic driving circuit 10 includes a controller 11 and a first switch unit 12, the controller 11 is electrically connected to the first switch unit 12, and the first switch unit 12 is electrically connected to the electromagnetic valve 20.
In the present embodiment, the controller 11 is configured to send a first control signal to the first switching unit 12 when the electromagnetic valve 20 is opened; the first switch unit 12 is used for providing a first current signal to the solenoid valve 20 according to a first control signal; the controller 11 is further configured to send a second control signal to the first switch unit 12 after the electromagnetic valve 20 is opened; the first switch unit 12 is further configured to provide a second current signal to the solenoid valve 20 according to a second control signal, so as to maintain the solenoid valve 20 in an open state, wherein the first current signal is greater than the second current signal.
It can be understood that, when the solenoid valve 20 needs to be opened, the controller 11 may send a first control signal to the first switching unit 12 within a first preset time, and the first switching unit 12 provides a first current signal to the solenoid valve 20 according to the first control signal, so that the solenoid valve 20 is completely opened within the first preset time; after the first preset time, the controller 11 sends a second control signal to the first switching unit 12, and the first switching unit 12 provides a second current signal to the solenoid valve 20 according to the second control signal, so that the solenoid valve 20 maintains an open state. The first control signal may be at a high level, for example, at a high level of 5V; the second control signal may be a PWM signal, for example, a PWM signal having a frequency of 10KHz to 20 KHz; the first preset time may be an opening time during which the solenoid valve 20 is fully opened under the first current signal.
As shown in fig. 3, which is a schematic diagram of an implementation of the first switch unit 12 in fig. 2, the first switch unit 12 includes a first switch Q1, the first switch Q1 includes a first pin, a second pin and a third pin, the first pin is electrically connected to the controller 11, the second pin is electrically connected to the solenoid valve 20, and the third pin is grounded.
In this embodiment, when the controller 11 sends the first control signal to the first pin of the first switch Q1, the first pin of the first switch Q1 receives a current corresponding to the first control signal, and the second pin and the third pin of the first switch Q1 are turned from the off state to the on state, so that the first current signal is generated in a path where the second pin and the third pin are turned on. Since the first switch Q1 has an amplifying function, the current corresponding to the first current signal and the first control signal is a predetermined multiple.
When the controller 11 sends the second control signal to the first pin of the first switch Q1, the first pin of the first switch Q1 receives a current corresponding to the second control signal, the second pin and the third pin of the first switch Q1 are in a conducting state, and a second current signal is generated in a path where the second pin and the third pin are in a conducting state. Since the first switch Q1 has an amplifying function, the current corresponding to the second current signal and the second control signal is also a predetermined multiple.
Since the first control signal is at a high level and the second control signal is a PWM signal, the voltage of the first control signal is higher than that of the second control signal. Then the current corresponding to the first control signal is greater than the current corresponding to the second control signal, so the first current signal is greater than the second current signal.
in this embodiment, the first switch Q1 may be a MOS transistor, wherein when the first switch Q1 is a MOS transistor, the first pin is a gate of the MOS transistor, the second pin is a drain of the MOS transistor, and the third pin is a source of the MOS transistor. It should be noted that, in other embodiments, the first switch Q1 may also be a transistor, which is not limited in this application.
Further, in the present embodiment, the first switch unit 12 further includes a third resistor R3, and the controller 11 is electrically connected to the first pin of the first switch tube Q1 through the third resistor R3. The third resistor R3 plays a role of current limiting, and prevents the controller 11 from generating an excessive current when sending the first control signal or the second control signal to the first switch Q1, thereby burning out the first switch Q1.
Further, in this embodiment, as shown in fig. 4, which is another implementable structural block diagram of the electromagnetic driving circuit 10 in fig. 1, the electromagnetic driving circuit 10 includes the controller 11 and the first switching unit 12 in fig. 2, and further includes a feedback unit 13, the feedback unit 13 is electrically connected to the controller 11, and the feedback unit 13 is also electrically connected to the electromagnetic valve 20 through the first switching unit 12.
In this embodiment, the feedback unit 13 is configured to collect the first current signal or the second current signal, and transmit the first current signal or the second current signal to the controller 11; the controller 11 is further configured to determine whether the electromagnetic valve 20 is short-circuited according to the first current signal or the second current signal, and control the first switching unit 12 to be turned off when the electromagnetic valve 20 is short-circuited; the controller 11 is further configured to adjust a duty ratio of the second control signal according to the second current signal, so as to adjust a power level of the solenoid valve 20.
It can be understood that when the electromagnetic valve 20 is short-circuited, that is, the first current signal or the second current signal collected by the feedback unit 13 exceeds the first current preset value, the controller 11 stops sending the first control signal or the second control signal to the first switching tube Q1 of the first switching unit 12, and then controls the first switching tube Q1 to be turned off, so that the electromagnetic valve 20 is turned off. After the electromagnetic valve 20 is opened, that is, after the controller 11 is in the first preset time, the controller 11 compares the second current signal with the first current preset value and the second current preset value, and if the second current signal is higher than the second current preset value and lower than the first current preset value, it indicates that the second current flowing through the electromagnetic valve 20 is too large, and the controller 11 decreases the duty ratio of the second controller 11 signal, thereby decreasing the power of the electromagnetic valve 20. Wherein the first current preset value is greater than the second current preset value. It can be seen that the feedback unit 13 plays a role of real-time feedback, monitoring and protection.
As shown in fig. 5, which is a schematic diagram of an implementable circuit of the electromagnetic driving circuit 10 shown in fig. 4, the feedback unit 13 includes a first resistor R1, one end of the first resistor R1 is electrically connected to both the first switch unit 12 and the controller 11, and the other end of the first resistor R1 is grounded.
It can be understood that one end of the first resistor R1 is electrically connected to both the third pin of the first switch Q1 and the controller 11, and the other end of the first resistor R1 is grounded. The first resistor R1 is a sampling resistor.
Further, in the present embodiment, the feedback unit 13 further includes a second resistor R2, and one end of the first resistor R1 is electrically connected to the controller 11 through the second resistor R2. The second resistor R2 functions as a current limiting function to prevent the collected first current signal or second current signal from burning out the controller 11.
Further, in the present embodiment, the feedback unit 13 further includes a capacitor C1, one end of the capacitor C1 is electrically connected to one end of the first resistor R1, and the other end of the capacitor C1 is electrically connected to the other end of the first resistor R1. The capacitor C1 is used for filtering the first current signal or the second current signal.
further, in the present embodiment, the electromagnetic drive circuit 10 further includes a freewheel unit 14, and the freewheel unit 14 is electrically connected to the electromagnetic valve 20, the controller 11, and the first switch unit 12.
It will be appreciated that the controller 11 is also configured to send a third control signal to the freewheel unit 14 after opening the solenoid valve 20; the freewheel unit 14 is used to implement a freewheel function for the solenoid valve 20 according to the third control signal. Wherein, the third control signal may be a high level.
In this embodiment, the freewheel unit 14 includes a second switch Q2 and a first diode D1, the second switch Q2 includes a fourth pin, a fifth pin and a sixth pin, the fourth pin is electrically connected to the controller 11, the fifth pin is electrically connected to one end of the solenoid valve 20, the sixth pin is electrically connected to the cathode of the first diode D1, and the anode of the first diode D1 is electrically connected to both the other end of the solenoid valve 20 and the first switch unit 12.
It is understood that the anode of the first diode D1 is electrically connected to the other end of the solenoid valve 20 and the second pin of the first switch tube Q1. The fourth pin of the second switch Q2 receives the third control signal sent by the controller 11, so that the fifth pin and the sixth pin are in a conducting state. When the fifth pin and the sixth pin are in a conducting state, the solenoid valve 20, the first diode D1 and the second switch tube Q2 form a loop, and if the current flowing through the solenoid valve 20 changes, the back-induced electromotive force generated by the solenoid valve 20 will flow back to the solenoid valve 20 through the first diode D1 and the second switch tube Q2, and the back-induced electromotive force generated by the solenoid valve 20 will not damage the first switch tube Q1.
in this embodiment, when the solenoid valve 20 is closed, the controller 11 stops sending the first control signal or the second control signal to the first switch tube Q1, and also stops sending the third control signal to the second switch tube Q2, so that the first switch tube Q1 and the second switch tube Q2 are both closed, so that the solenoid valve 20 can be quickly closed.
In this embodiment, the second switch Q2 may adopt a MOS transistor, wherein when the second switch Q2 adopts a MOS transistor, the fourth pin is a gate of the MOS transistor, the fifth pin is a source of the MOS transistor, and the sixth pin is a drain of the MOS transistor. It should be noted that, in other embodiments, the second switching tube Q2 may also be a triode, which is not limited in this application.
further, in this embodiment, the freewheeling unit 14 further includes a fourth resistor R4, the controller 11 is electrically connected to the second switching tube Q2 through the fourth resistor R4, and the fourth resistor R4 plays a role of current limiting, so as to prevent the second switching tube Q2 from being burnt due to an excessive current generated when the controller 11 sends the third control signal to the second switching tube Q2.
Further, in this embodiment, the electromagnetic driving circuit 10 further includes a protection unit 15, one end of the protection unit 15 is electrically connected to the first pin, and the other end of the protection unit 15 is electrically connected to the second pin.
It can be understood that the protection unit 15 serves to prevent the reverse induced electromotive force generated from the solenoid valve 20 from breaking down the first switching tube Q1.
In this embodiment, the protection unit 15 includes a second diode D2 and a zener diode, an anode of the second diode D2 is electrically connected to the second pin, a cathode of the second diode D2 is electrically connected to a cathode of the zener diode, and an anode of the zener diode D3 is electrically connected to the first pin.
It can be understood that, when the solenoid valve 20 is closed, since the second switching tube Q2 is closed, the reverse electromotive force generated from the solenoid valve 20 cannot be consumed by returning to the solenoid valve 20 itself through the second switching tube Q2 and the first diode D1. The back electromotive force generated by the solenoid valve 20 is clamped by the second diode D2 and the zener diode D3 and is discharged from the zener diode inside the first switching tube Q1.
in this embodiment, the controller 11 may adopt an STM32F103C8T6, the controller 11 includes a first output terminal, a second output terminal and an input terminal, the first output terminal is electrically connected to the first pin of the first switch tube Q1 through a third resistor R3, the second output terminal is electrically connected to the fourth pin of the second switch tube Q2 through a fourth resistor R4, and the input terminal is electrically connected to one end of the first resistor R1 through a second resistor R2. That is, the first output terminal outputs the first control signal or the second control signal, the second output terminal outputs the third control signal, and the input terminal receives the first current signal or the second current signal. As shown in fig. 6, which is a schematic diagram of the control signal output by the controller 11 and the received current signal, during a first preset time, the first output terminal of the controller 11 outputs the first control signal, and the input terminal of the controller 11 receives the first current signal; after the first preset time, the first output terminal of the controller 11 outputs a second control signal, the second output terminal of the controller 11 outputs a third control signal, and the input terminal of the controller 11 receives a second current signal; after the solenoid valve 20 is opened and closed, the first output terminal and the second output terminal of the controller 11 have no control signal output, and the input terminal of the controller 11 has no current signal reception.
In the present embodiment, the solenoid valve 20 includes a solenoid L1 and a core (not shown), one end of the solenoid L1 is electrically connected to both the power supply 30 and the fifth pin of the second switch tube Q2, and the other end of the solenoid L1 is electrically connected to both the anode of the first diode D1, the anode of the second diode D2 and the second pin of the first switch tube Q1.
It will be appreciated that when the solenoid valve 20 is open, the solenoid L1 converts the electrical energy derived from the first current signal into an electromagnetic force that acts to wick up the valve. To maintain the solenoid in the attracted state after the solenoid valve 20 is opened, the solenoid L1 only needs to obtain a small electromagnetic force according to the second current signal to ensure that the solenoid is in the attracted state. When solenoid valve 20 is closed, no power is available to solenoid coil L1, the electromagnetic force generated by it disappears, and the core will return to its original position, causing solenoid valve 20 to close.
To sum up, the electromagnetic driving circuit and the electronic device provided by the present invention comprise a controller and a first switch unit, wherein the controller is electrically connected to the first switch unit, and the first switch unit is electrically connected to the electromagnetic valve; when the electromagnetic valve is opened, the controller sends a first control signal to the first switch unit; the first switch unit provides a first current signal to the electromagnetic valve according to a first control signal; the first switch sends a second control signal to the first switch unit after the electromagnetic valve is opened; the first switch unit provides a second current signal to the electromagnetic valve according to a second control signal so as to keep the electromagnetic valve in an opening state. Therefore, when the electromagnetic valve is opened, the electromagnetic driving circuit provides a larger first current signal to the electromagnetic valve, so that the electromagnetic valve can be quickly opened; after the electromagnetic valve is opened, the electromagnetic driving circuit provides a smaller second current signal for the electromagnetic valve, so that the electromagnetic valve can maintain the opening state with smaller electric energy. The speed of the electromagnetic valve is increased, the reliability of the electromagnetic valve is improved, and energy is saved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The electromagnetic drive circuit is characterized by comprising a controller and a first switch unit, wherein the controller is electrically connected with the first switch unit, and the first switch unit is electrically connected with an electromagnetic valve;
The controller is used for sending a first control signal to the first switch unit when the electromagnetic valve is opened;
The first switch unit is used for providing a first current signal to the electromagnetic valve according to the first control signal;
The controller is also used for sending a second control signal to the first switch unit after the electromagnetic valve is opened;
The first switch unit is further configured to provide a second current signal to the solenoid valve according to the second control signal, so that the solenoid valve maintains an open state, wherein the first current signal is greater than the second current signal.
2. The electromagnetic drive circuit according to claim 1, wherein the first switch unit comprises a first switch tube, the first switch tube comprises a first pin, a second pin and a third pin, the first pin is electrically connected with the controller, the second pin is electrically connected with the electromagnetic valve, and the third pin is grounded.
3. The electromagnetic drive circuit according to claim 1, further comprising a feedback unit electrically connected to the controller, the feedback unit further electrically connected to the electromagnetic valve through the first switch unit;
The feedback unit is used for acquiring the first current signal or the second current signal and transmitting the first current signal or the second current signal to the controller;
The controller is further used for judging whether the electromagnetic valve is short-circuited according to the first current signal or the second current signal and controlling the first switch unit to be switched off when the electromagnetic valve is short-circuited;
The controller is further used for adjusting the duty ratio of the second control signal according to the second current signal, and then adjusting the power of the electromagnetic valve.
4. The electromagnetic drive circuit according to claim 3, wherein the feedback unit includes a first resistor, one end of the first resistor is electrically connected to both the first switch unit and the controller, and the other end of the first resistor is grounded.
5. The electromagnetic drive circuit according to claim 4, wherein the feedback unit further comprises a second resistor, and one end of the first resistor is electrically connected to the controller through the second resistor.
6. The electromagnetic drive circuit according to claim 1, further comprising a freewheel unit electrically connected to each of the electromagnetic valve, the controller, and the first switch unit.
7. The electromagnetic driving circuit according to claim 6, wherein the freewheeling unit includes a second switch tube and a first diode, the second switch tube includes a fourth pin, a fifth pin and a sixth pin, the fourth pin is electrically connected to the controller, the fifth pin is electrically connected to one end of the electromagnetic valve, the sixth pin is electrically connected to a cathode of the first diode, and an anode of the first diode is electrically connected to the other end of the electromagnetic valve and the first switch unit.
8. The electromagnetic driving circuit according to claim 2, further comprising a protection unit, wherein one end of the protection unit is electrically connected to the first pin, and the other end of the protection unit is electrically connected to the second pin.
9. The electromagnetic drive circuit according to claim 8, wherein the protection unit comprises a second diode and a zener diode, an anode of the second diode is electrically connected to the second pin, a cathode of the second diode is electrically connected to a cathode of the zener diode, and an anode of the zener diode is electrically connected to the first pin.
10. An electronic device, characterized by comprising a solenoid valve and an electromagnetic drive circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920460753.9U CN209800830U (en) | 2019-04-04 | 2019-04-04 | Electromagnetic drive circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920460753.9U CN209800830U (en) | 2019-04-04 | 2019-04-04 | Electromagnetic drive circuit and electronic equipment |
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| CN209800830U true CN209800830U (en) | 2019-12-17 |
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| CN201920460753.9U Active CN209800830U (en) | 2019-04-04 | 2019-04-04 | Electromagnetic drive circuit and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046376A (en) * | 2021-11-23 | 2022-02-15 | 浙江工业大学 | Electromagnetic switch valve driving circuit and method based on capacitance bootstrap technology |
| CN114321482A (en) * | 2021-11-23 | 2022-04-12 | 皇明太阳能股份有限公司 | Short-circuit protection circuit for water supply electromagnetic valve and electromagnetic valve control device |
-
2019
- 2019-04-04 CN CN201920460753.9U patent/CN209800830U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046376A (en) * | 2021-11-23 | 2022-02-15 | 浙江工业大学 | Electromagnetic switch valve driving circuit and method based on capacitance bootstrap technology |
| CN114321482A (en) * | 2021-11-23 | 2022-04-12 | 皇明太阳能股份有限公司 | Short-circuit protection circuit for water supply electromagnetic valve and electromagnetic valve control device |
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