Clutch driving module and system

Abstract

The utility model provides a clutch driving module and system. The clutch driving module comprises a power conversion circuit and an electromagnetic valve driving circuit; one end of the power conversion circuit is used for inputting power, and the other end is connected with the solenoid valve driving circuit; the power conversion circuit is used for converting an input power supply into a set voltage and supplying power to the electromagnetic valve driving circuit; the electromagnetic valve driving circuit comprises a signal processing unit, a first on-off control device, a first sampling unit and a second sampling unit; the signal processing unit comprises a first signal output end, a first sampling end and a second sampling end; the signal processing unit is used for detecting that a first sampling signal of the first sampling end is matched with a second sampling signal of the second sampling end, and then the first signal output end outputs a first control signal to the first on-off control device so as to control the first on-off control device to be switched on. According to the mode, the clutch driving cost is reduced, the circuit safety is improved, and meanwhile the high-power driving capacity is met.

Description

Technical Field

[0001] This application relates to the field of power technology, and in particular to a clutch drive module and system. Background Technology

[0002] In related technologies, the clutch solenoid valve is connected to a dedicated IC (Integrated Circuit) to drive the clutch. This dedicated IC needs to be designed and manufactured according to user requirements and the specific needs of the electronic system, and its driving capability is relatively low, relying solely on a single current-limiting resistor for circuit safety. Therefore, using dedicated ICs results in high cost, poor safety, and an inability to meet high-power driving requirements. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a clutch drive module and system to reduce clutch drive cost, improve circuit safety, and at the same time meet the requirements of high power drive capability.

[0004] In a first aspect, embodiments of this application provide a clutch drive module, which includes: a power conversion circuit and a solenoid valve drive circuit; one end of the power conversion circuit is used to input power, and the other end is connected to the solenoid valve drive circuit; the power conversion circuit is used to convert the input power into a set voltage and supply power to the solenoid valve drive circuit; the solenoid valve drive circuit includes a signal processing unit, a first on / off control device, a first sampling unit, and a second sampling unit; the first end of the first sampling unit is connected to the first end of the first on / off control device, the second end of the first sampling unit is connected to the first end of the second sampling unit, and the second end of the second sampling unit is grounded; the signal processing unit includes a first signal output terminal, a first sampling terminal, and a second sampling terminal; the first signal output terminal is connected to the second end of the first on / off control device, the first sampling terminal is connected between the first end of the first sampling unit and the first end of the first on / off control device, and the second sampling terminal is connected between the first sampling unit and the second sampling unit; the signal processing unit is used to detect that the first sampling signal obtained by the first sampling terminal matches the second sampling signal obtained by the second sampling terminal, and then the first signal output terminal outputs a first control signal to the first on / off control device to control the first on / off control device to conduct.

[0005] The aforementioned solenoid valve drive circuit also includes a first diode; the first diode is connected in parallel across the two ends of the solenoid valve of the clutch; the positive terminal of the first diode is connected to the third terminal of the first on / off control device and the negative terminal of the solenoid valve respectively; the negative terminal of the first diode is connected to the positive terminal of the solenoid valve and the output terminal of the power conversion circuit respectively.

[0006] The aforementioned first on / off control device includes a first insulated-gate field-effect transistor; the first terminal of the first on / off control device is the source, the second terminal is the gate, and the third terminal is the drain; the gate of the first on / off control device is connected to the first signal output terminal of the signal processing unit; the source of the first on / off control device is connected to the first terminal of the first sampling unit; the drain of the first on / off control device is connected to the negative terminal of the solenoid valve of the clutch and the positive terminal of the first diode, respectively.

[0007] The first sampling unit includes a first current-sensing resistor, and the second sampling unit includes a second current-sensing resistor; the first sampling terminal is used to collect the first current flowing through the first current-sensing resistor and the second current-sensing resistor, and the second sampling terminal is used to collect the second current flowing through the second current-sensing resistor; when the first current matches the second current, the first signal output terminal of the signal processing unit outputs a first control signal to the first on / off control device.

[0008] The matching of the first current and the second current mentioned above includes: the first current and the second current being equal.

[0009] The aforementioned clutch drive module further includes: a second on / off control device; the second on / off control device is disposed between the power conversion circuit and the power supply; the second on / off control device is used to turn on after receiving a start signal, so that the power conversion circuit is energized; and to turn off after receiving a stop signal, so that the power conversion circuit is de-energized.

[0010] The aforementioned clutch drive module further includes: a logic controller; the logic controller is connected to the signal processing unit; the logic controller is used to: send a start signal to the second on / off control device after receiving the working signal from the signal processing unit; and send a stop signal to the second on / off control device after receiving an abnormal signal from the signal processing unit.

[0011] The aforementioned second on / off control device includes a second insulated-gate field-effect transistor; the gate of the second on / off control device is connected to a logic control device; the source of the second on / off control device is connected to the positive terminal of a power supply; and the drain of the second on / off control device is connected to a power conversion circuit.

[0012] The power conversion circuit described above includes: an input capacitor, an inductor, a third on / off control device, a second diode, and an output capacitor; one end of the input capacitor is connected to the positive terminal of the power supply, and the other end is grounded; one end of the inductor is connected to the positive terminal of the power supply and the input capacitor, and the other end is connected to the positive terminal of the second diode and the third on / off control device; one end of the output capacitor is connected to the negative terminal of the second diode and the solenoid valve drive circuit, and the other end is grounded.

[0013] The aforementioned power conversion circuit further includes: a power drive unit and a third sampling unit; the power drive unit includes a second signal output terminal and a third sampling terminal; the second signal output terminal of the power drive unit is connected to a third on / off control device, and the third sampling terminal is connected between the first terminal of the third sampling unit and the third on / off control device; the second terminal of the third sampling unit is grounded; the power drive unit is used to detect whether the third sampling signal of the third sampling terminal exceeds a preset threshold; based on the third sampling signal, the second signal output terminal of the power drive unit outputs an on / off control signal to the third on / off control device.

[0014] The aforementioned third on / off control device includes a first insulated-gate field-effect transistor; the gate of the third on / off control device is connected to the second signal output terminal of the power supply drive unit; the source of the third on / off control device is connected to the first terminal of the third sampling unit; and the drain of the third on / off control device is connected to the positive terminals of the inductor and the second diode, respectively.

[0015] Secondly, embodiments of this application provide a clutch drive system, which includes the aforementioned clutch drive module and a clutch; the clutch drive module is connected to a solenoid valve of the clutch.

[0016] The aforementioned clutch drive module and system, wherein the clutch drive module includes a power conversion circuit and a solenoid valve drive circuit; one end of the power conversion circuit is used to input power, and the other end is connected to the solenoid valve drive circuit; the power conversion circuit is used to convert the input power into a set voltage and supply power to the solenoid valve drive circuit; the solenoid valve drive circuit includes a signal processing unit, a first on / off control device, a first sampling unit, and a second sampling unit; the first end of the first sampling unit is connected to the first end of the first on / off control device, the second end of the first sampling unit is connected to the first end of the second sampling unit, and the second end of the second sampling unit is grounded; the signal processing unit includes a first signal output terminal, a first sampling terminal, and a second sampling terminal; the first signal output terminal is connected to the second end of the first on / off control device, the first sampling terminal is connected between the first end of the first sampling unit and the first end of the first on / off control device, and the second sampling terminal is connected between the first sampling unit and the second sampling unit; the signal processing unit is used to detect that the first sampling signal of the first sampling terminal matches the second sampling signal of the second sampling terminal, and then the first signal output terminal outputs a first control signal to the first on / off control device to control the first on / off control device to conduct.

[0017] In this method, the power conversion circuit can boost the input power and supply power to the solenoid valve drive circuit; after the signal processing unit of the solenoid valve drive circuit detects the match between the first and second sampled signals, it outputs a first control signal, thus enabling the clutch drive module to operate normally. This method reduces the cost of clutch drive, improves circuit safety, and simultaneously meets the requirements for high-power drive capability.

[0018] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a clutch drive module provided in an embodiment of this application;

[0021] Figure 2 A circuit diagram of a solenoid valve drive circuit provided for an embodiment of this application;

[0022] Figure 3 A circuit diagram of a clutch drive circuit provided in an embodiment of this application;

[0023] Figure 4 A circuit diagram of a power conversion circuit provided in an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of a clutch drive system provided in an embodiment of this application. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] In related technologies, the clutch solenoid valve is connected to a dedicated IC (Integrated Circuit), such as those from NXP, Infineon, and TI semiconductor chips. Using a dedicated IC to drive the clutch requires designing and manufacturing according to user requirements and the specific needs of the electronic system. Furthermore, the driving capability is relatively low, and the circuit safety is protected only by a single current-limiting resistor. Therefore, using dedicated ICs results in high cost, poor safety, and an inability to meet high-power driving requirements.

[0027] Based on this, the clutch drive module and system provided in this application embodiment can be applied in clutch driving.

[0028] To facilitate understanding of this embodiment, a clutch drive module disclosed in this application will first be described in detail, such as... Figure 1 As shown, the clutch drive module includes: a power conversion circuit 11 and a solenoid valve drive circuit 12;

[0029] One end of the power conversion circuit 11 is used to input power, and the other end is connected to the solenoid valve drive circuit 12; the power conversion circuit 11 is used to convert the input power into a set voltage and supply power to the solenoid valve drive circuit 12.

[0030] The power conversion circuit 11 can be a BOOST circuit or other types of circuits with boost function; the power conversion circuit 11 converts the input power into a higher voltage and supplies power to the solenoid valve drive circuit 12, thereby providing the clutch with a driving capability of up to 100 watts; optionally, the input power in the power conversion circuit 11 is 12V, the set voltage is 20V, and the power source can be a low-voltage battery.

[0031] The solenoid valve drive circuit 12 includes a signal processing unit 121, a first on / off control device 122, a first sampling unit 123, and a second sampling unit 124. The first terminal 1231 of the first sampling unit 123 is connected to the first terminal 1221 of the first on / off control device 122, the second terminal 1232 of the first sampling unit 123 is connected to the first terminal 1241 of the second sampling unit 124, and the second terminal 1242 of the second sampling unit 124 is grounded.

[0032] The first on / off control device 122 can control the circuit to be connected or disconnected according to the control signal output by the signal processing unit 121, such as a controllable switch like a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) or a BJT (Bipolar Junction Transistor).

[0033] In practical applications, the first sampling unit 123 and the second sampling unit 124 can measure the current flowing through them, or convert the current flowing through them into a voltage signal proportional to it and provide it to the signal processing unit 121. The first terminal 1231 of the first sampling unit 123 is connected to the first terminal 1221 of the first on / off control device 122. The current flows into the first terminal 1231 of the first sampling unit 123 from the first terminal 1221 of the first on / off control device 122. The second terminal 1232 of the first sampling unit 123 is connected to the first terminal 1241 of the second sampling unit 124. The current flows out from the second terminal 1232 of the first sampling unit 123 and then into the first terminal 1241 of the second sampling unit 124. The second terminal 1242 of the second sampling unit 124 is grounded.

[0034] The signal processing unit 121 includes a first signal output terminal 1211, a first sampling terminal 1212, and a second sampling terminal 1213. The first signal output terminal 1211 is connected to the second terminal 1222 of the first on / off control device 122, the first sampling terminal 1212 is connected between the first terminal 1231 of the first sampling unit 123 and the first terminal 1221 of the first on / off control device 122, and the second sampling terminal 1213 is connected between the first sampling unit 123 and the second sampling unit 124.

[0035] In actual implementation, the first signal output terminal 1211 of the signal processing unit 121 is connected to the second terminal 1222 of the first on / off control device 122, and the first signal output terminal 1211 is used to output control signals; the first sampling terminal 1212 is connected between the first terminal 1231 of the first sampling unit 123 and the first terminal 1221 of the first on / off control device 122, and the first sampling terminal 1212 is used to sample the current flowing through the first sampling unit 123 and the second sampling unit 124, or to sample the voltage to ground of the first terminal 1231 of the first sampling unit 123; the second sampling terminal 1213 is connected between the first sampling unit 123 and the second sampling unit 124, and the second sampling terminal 1213 is used to sample the current flowing through the second sampling unit 124, or to sample the voltage to ground of the first terminal 1241 of the second sampling unit 124.

[0036] In one example, the signal processing unit 121 is a DSP, that is, a digital signal processor, which can convert analog signals into digital signals.

[0037] The signal processing unit 121 is used to detect that the first sampling signal obtained by the first sampling terminal 1212 matches the second sampling signal obtained by the second sampling terminal 1213. The first signal output terminal 1211 outputs a first control signal to the first on / off control device 122 to control the first on / off control device 122 to be turned on.

[0038] The first control signal can be a PWM signal, i.e., a pulse width modulation signal. The duty cycle of the first control signal can be adjusted according to the working voltage of the solenoid valve. For example, if the duty cycle is 80%, then the proportion of the high level duration in the pulse signal within one working cycle is 80%, which is the on-time of the first on-off control device 122. When the current indicated by the first sampling signal or the second sampling signal is high, the duty cycle can be reduced to reduce the on-time of the first on-off control device 122, so that the voltage across the solenoid valve matches its working voltage.

[0039] In actual implementation, the signal processing unit 121 detects whether the first sampling signal sampled by the first sampling terminal 1212 matches the second sampling signal sampled by the second sampling terminal 1213. If the first sampling signal and the second sampling signal match, the first signal output terminal 1211 of the signal processing unit 121 outputs a first control signal to the first on / off control device 122. After the first on / off control device 122 is turned on, the solenoid valve of the clutch can work normally.

[0040] If the first sampling signal and the second sampling signal do not match, then the indicator circuit is in an abnormal state. The signal processing unit 121 stops outputting the first control signal, the first on / off control device 122 is disconnected, and the solenoid valve is disconnected, thereby improving the circuit safety.

[0041] The aforementioned clutch drive module includes a power conversion circuit and a solenoid valve drive circuit. One end of the power conversion circuit is used to input power, and the other end is connected to the solenoid valve drive circuit. The power conversion circuit converts the input power into a set voltage and supplies power to the solenoid valve drive circuit. The solenoid valve drive circuit includes a signal processing unit, a first on / off control device, a first sampling unit, and a second sampling unit. The first end of the first sampling unit is connected to the first end of the first on / off control device, the second end of the first sampling unit is connected to the first end of the second sampling unit, and the second end of the second sampling unit is grounded. The signal processing unit includes a first signal output terminal, a first sampling terminal, and a second sampling terminal. The first signal output terminal is connected to the second end of the first on / off control device, the first sampling terminal is connected between the first end of the first sampling unit and the first end of the first on / off control device, and the second sampling terminal is connected between the first sampling unit and the second sampling unit. The signal processing unit detects that the first sampling signal obtained from the first sampling terminal matches the second sampling signal obtained from the second sampling terminal, and then outputs a first control signal to the first on / off control device from the first signal output terminal to control the first on / off control device to conduct.

[0042] In this method, the power conversion circuit can boost the input power and supply power to the solenoid valve drive circuit; after the signal processing unit of the solenoid valve drive circuit detects the match between the first and second sampled signals, it outputs a first control signal, thus enabling the clutch drive module to operate normally. This method reduces the cost of clutch drive, improves circuit safety, and simultaneously meets the requirements for high-power drive capability.

[0043] Figure 2 A circuit diagram of a solenoid valve drive circuit 12 is shown.

[0044] In one implementation, the solenoid valve drive circuit further includes a first diode 125; the first diode 125 is connected in parallel across the two ends of the solenoid valve of the clutch; the positive terminal 1251 of the first diode 125 is connected to the third terminal 1221 of the first on / off control device 122 and the negative terminal of the solenoid valve respectively; the negative terminal 1252 of the first diode 125 is connected to the positive terminal of the solenoid valve and the output terminal 111 of the power conversion circuit 11 respectively.

[0045] The first diode 125 can serve as a freewheeling current, protecting other components in the circuit from being broken down or burned by the induced voltage when there is a sudden change in voltage or current. In this embodiment, when the first on / off control device 122 is turned off, the first diode 125 can dissipate the induced electromotive force of the solenoid valve, thereby protecting the first on / off control device 122.

[0046] exist Figure 2 In the circuit, the first diode 125 is connected in parallel across the two ends of the solenoid valve of the clutch. The positive terminal 1251 of the first diode 125 is connected to the third terminal 1221 of the first on / off control device 122 and the negative terminal VALVE- of the solenoid valve, respectively. The negative terminal 1252 of the first diode 125 is connected to the positive terminal VALVE+ of the solenoid valve and the output terminal 111 of the power conversion circuit 11, respectively. When the first on / off control device 122 is turned on, the positive voltage of the first diode 125 is lower than the negative voltage, and the first diode 125 is in the off state. When the first on / off control device 122 is turned off, the positive voltage of the first diode 125 is higher than the negative voltage, and the first diode 125 is in the on state.

[0047] In one implementation, the first on / off control device 122 includes a first insulated-gate field-effect transistor; the first terminal 1221 of the first on / off control device 122 is the source, the second terminal 1222 is the gate, and the third terminal 1223 is the drain; the gate of the first on / off control device 122 is connected to the first signal output terminal 1211 of the signal processing unit 121; the source of the first on / off control device 122 is connected to the first terminal 1231 of the second sampling unit 123; the drain of the first on / off control device 122 is connected to the negative terminal of the solenoid valve of the clutch and the positive terminal 1251 of the first diode 125.

[0048] In one example, the first insulated gate field-effect transistor can specifically be an NMOS transistor located on the negative side of power supply 14.

[0049] like Figure 2The NMOS transistor is an enhancement-mode NMOS transistor. The gate of the NMOS transistor is connected to the first signal output terminal 1211 of the signal processing unit 121, the source of the NMOS transistor is connected to the first terminal 1231 of the second sampling unit 123, and the drain of the NMOS transistor is connected to the negative terminal VALVE- of the clutch solenoid valve and the positive terminal 1251 of the first diode 125, respectively. When the gate voltage is greater than the first threshold voltage, the NMOS transistor turns on and a conductive channel appears.

[0050] In one implementation, the second sampling unit 123 includes a first current-sensing resistor, and the second sampling unit 124 includes a second current-sensing resistor; the first sampling terminal 1212 is used to collect a first current flowing through the first current-sensing resistor and the second current-sensing resistor, and the second sampling terminal 1213 is used to collect a second current flowing through the second current-sensing resistor; when the first current matches the second current, the first signal output terminal 1211 of the signal processing unit 121 outputs a first control signal to the first on / off control device 122.

[0051] The first and second current-sensing resistors can be used for current measurement. The first and second current-sensing resistors are connected in series in the current conduction path to measure the magnitude of the current flowing through the circuit.

[0052] like Figure 2 The first sampling unit 123 is a first current-sensing resistor, and the second sampling unit 124 is a second current-sensing resistor. The first current-sensing resistor and the second current-sensing resistor are connected in series. The first sampling terminal 1212 of the signal processing unit 121 collects the first current flowing through the first current-sensing resistor and the second current-sensing resistor, and the second sampling terminal 1213 collects the second current flowing through the second current-sensing resistor. If the signal processing unit 121 detects that the first current matches the second current, then the indicator circuit is normal. The first control signal is output to the first on / off control device 122 through the first signal output terminal 1211 of the signal processing unit 121 to control the first on / off control device 122 to perform normal on / off switching.

[0053] Furthermore, matching the first current with the second current includes: the first current being equal to the second current.

[0054] In practice, if the first current flowing through the first current sensing resistor and the second current sensing resistor is equal to the second current flowing through the second current sensing resistor, then the first current and the second current are matched; if the first current flowing through the first current sensing resistor and the second current sensing resistor are not equal to the second current flowing through the second current sensing resistor, then the first current and the second current are not matched.

[0055] Figure 3 A circuit diagram of a clutch drive circuit is shown.

[0056] In one implementation, the clutch drive module further includes a second on / off control device 13; the second on / off control device 13 is disposed between the power conversion circuit 11 and the power supply 14; the second on / off control device 13 is used to turn on after receiving a start signal, so that the power conversion circuit 11 is energized; and to turn off after receiving a stop signal, so that the power conversion circuit 11 is de-energized.

[0057] The second on / off controller 13 can be understood as the main switch of the clutch drive circuit, and the on / off state of the second on / off controller 13 can control the on / off state of the power supply 14.

[0058] refer to Figure 3 Assuming the supply voltage of power supply 14 is 12V, after the second on / off control device 13 receives the start signal and turns on, power supply 14 provides 12V to power conversion circuit 11, energizing power conversion circuit 11. When the second on / off control device 13 receives the off signal and turns off, it stops supplying power to power conversion circuit 11, de-energizing power conversion circuit 11. In an optional configuration, the start signal is a low-level signal, and the off signal is a high-level signal.

[0059] Furthermore, the clutch drive module also includes: a logic controller 15; the logic controller 15 is connected to the signal processing unit 121; the logic controller 15 is used to: send a start signal to the second on / off control device 13 after receiving the working signal from the signal processing unit 121; and send a stop signal to the second on / off control device 13 after receiving an abnormal signal from the signal processing unit 121.

[0060] refer to Figure 3 The logic controller 15 includes two pins, which can receive indication signals to indicate whether the circuit is working properly, and then send a start signal or a stop signal to the second on / off controller 13.

[0061] Specifically, when the logic controller 15 receives the working signal sent by the signal processing unit 121, it can send a start signal to the second on / off controller 13; when the logic controller 15 receives an abnormal signal sent by the signal processing unit 121, it can send a stop signal to the second on / off controller 13. This abnormal signal can specifically indicate a hardware fault such as a short circuit, overcurrent, or overvoltage, or a software fault such as a power failure of the signal processing unit 121 or software malfunction.

[0062] In practical applications, the logic controller 15 typically sends a shutdown signal to the second on / off controller 13 in two situations: first, during power-on self-test, if the logic controller 15 receives an abnormal signal from the signal processing unit 121, then the logic controller 15 sends a shutdown signal to the second on / off controller 13; second, during clutch drive circuit operation, if the logic controller 15 receives an abnormal signal from the signal processing unit 121, then the logic controller 15 sends a shutdown signal to the second on / off controller 13. This power-on self-test is usually performed before the circuit is powered on, by allowing a small current to flow through the first sampling unit 123 and the second sampling unit 124, thereby detecting whether the clutch drive circuit is functioning correctly.

[0063] In one implementation, the second on / off control device 13 includes a second insulated-gate field-effect transistor; the gate 133 of the second on / off control device 13 is connected to the logic control device 15; the source 131 of the second on / off control device 13 is connected to the positive terminal of the power supply 14; and the drain 132 of the second on / off control device 13 is connected to the power conversion circuit 11.

[0064] In one example, the second insulated-gate field-effect transistor can specifically be a PMOS transistor located on the positive side of power supply 14.

[0065] like Figure 2 The PMOS transistor is an enhancement-mode PMOS transistor. The gate of the PMOS transistor is connected to the logic control device 15, the source of the PMOS transistor is connected to the positive terminal V+ of the power supply, and the drain of the PMOS transistor is connected to the power conversion circuit 11. When the gate voltage is greater than the second threshold voltage, the PMOS transistor turns on and a conductive channel appears.

[0066] Figure 4 A circuit diagram of a power conversion circuit 11 is shown.

[0067] In one implementation, the power conversion circuit 11 includes: an input capacitor 112, an inductor 113, a third on / off control device 114, a second diode 115, and an output capacitor 116; one end of the input capacitor 112 is connected to the positive terminal of the power supply 14, and the other end is grounded; one end of the inductor 113 is connected to the positive terminal of the power supply 14 and the input capacitor, and the other end is connected to the positive terminal 1151 of the second diode 115 and the third on / off control device 114; one end of the output capacitor 116 is connected to the negative terminal 1152 of the second diode 115 and the solenoid valve drive circuit 12, and the other end is grounded.

[0068] In one alternative configuration, the power conversion circuit 11 is a BOOST boost circuit, with the input capacitor 112 storing the electrical energy input from the power supply 14 to obtain a stable input voltage. The third on / off control device 114 can be understood as a switch in the power conversion circuit 11. The inductor 113 can convert electrical energy and magnetic field energy to each other. When the third on / off control device 114 is on, it converts electrical energy into magnetic field energy and stores it. When the third on / off control device 114 is off, it converts magnetic field energy into electric field energy and superimposes it with the supply voltage of the power supply 14. Through filtering by diodes and capacitors, a stable DC voltage is obtained and supplied to the load. The second diode 115 acts as an isolation device. When the third on / off control device 114 is on, it is in a reverse-biased cutoff state, and when the third on / off control device 114 is off, it is in a forward-biased conduction state.

[0069] refer to Figure 4 One end of the input capacitor 112 is connected to the positive terminal V+ of the power supply 14, and the other end is grounded. One end of the inductor 113 is connected to the positive terminal V+ of the power supply 14 and the input capacitor 112, and the other end is connected to the positive terminal 1151 of the second diode 115 and the third on / off control device 114. One end of the output capacitor 116 is connected to the negative terminal 1152 of the second diode 115 and the solenoid valve drive circuit 12, and the other end is grounded. In actual implementation, assuming the power supply voltage is 12V and the set voltage is 20V, the input capacitor 112 in the power conversion circuit 11 stores 12V, obtaining a stable 12V input voltage. By controlling the duty cycle of the third on / off control device 114, the voltage is boosted to 20V and stored in the output capacitor 116, thus obtaining a stable 20V output voltage to provide to the solenoid valve drive circuit 12.

[0070] Furthermore, the power conversion circuit 11 further includes a power drive unit 117 and a third sampling unit 118; the power drive unit 117 includes a second signal output terminal 1171 and a third sampling terminal 1172; the second signal output terminal 1171 of the power drive unit 117 is connected to the third on / off control device 114, and the third sampling terminal 1172 is connected between the first terminal 1181 of the third sampling unit 118 and the third on / off control device 114; the second terminal 1182 of the third sampling unit 118 is grounded; the power drive unit 117 is used to detect whether the third sampling signal of the third sampling terminal 1172 exceeds a preset threshold; according to the third sampling signal, the second signal output terminal 1171 of the power drive unit 117 outputs an on / off control signal to the third on / off control device 114.

[0071] In practical applications, the third sampling unit 118 is used to measure the current flowing through it, or to convert the current flowing through it into a voltage signal proportional to it and provide it to the power drive unit 117; the second signal output terminal 1171 of the power drive unit 117 is connected to the third on / off control device 114, and the second signal output terminal 1171 is used to output control signals; the third sampling terminal 1172 is connected between the first terminal 1181 of the third sampling unit 118 and the third on / off control device 114, and the third sampling terminal 1172 is used to sample the current flowing through the third sampling unit 118, or to sample the voltage to ground of the first terminal 1181 of the third sampling unit 118; the second terminal 1182 of the third sampling unit 118 is grounded, and the third sampling unit 118 can play the role of overcurrent protection.

[0072] Specifically, voltage closed-loop control is achieved through the power drive unit 117 and the third sampling unit 118. The power drive unit 117 is used to detect whether the third sampling signal at the third sampling terminal 1172 exceeds a preset threshold, and outputs an on / off control signal to the third on / off control device 114 according to the third sampling signal. For example, when the third sampling signal does not exceed the preset threshold, the second signal output terminal 1171 outputs a PWM signal with a specified duty cycle to the third on / off control device 114. The PWM signal can adjust the specified duty cycle according to the current magnitude indicated by the third sampling signal. If the power drive unit 117 detects that the third sampling signal exceeds the preset threshold, then the second signal output terminal 1171 outputs a turn-off signal to the third on / off control device 114 to turn off the third on / off control device 114.

[0073] In one implementation, the third on / off control device 114 includes a first insulated-gate field-effect transistor; the gate 1141 of the third on / off control device 114 is connected to the second signal output terminal 1171 of the power drive unit 117; the source 1142 of the third on / off control device 114 is connected to the first terminal 1181 of the third sampling unit 118; and the drain 1143 of the third on / off control device 114 is connected to the positive terminal 1151 of the inductor 113 and the second diode 115, respectively.

[0074] In one example, the first insulated gate field-effect transistor can specifically be an NMOS transistor located on the negative side of power supply 14.

[0075] like Figure 4The NMOS transistor is an enhancement-mode NMOS transistor. The gate of the NMOS transistor is connected to the second signal output terminal 1171 of the power drive unit 117, the source of the NMOS transistor is connected to the first terminal 1181 of the third sampling unit 118, and the drain of the NMOS transistor is connected to the positive terminal 1151 of the inductor 113 and the second diode 115. When the gate voltage is greater than the third threshold voltage, the NMOS transistor turns on and a conductive channel appears.

[0076] This application embodiment also provides a clutch drive system, as shown in 5. The clutch drive system includes the above-mentioned clutch drive module 51 and a clutch 52; the clutch drive module is connected to the solenoid valve 521 of the clutch.

[0077] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0078] Furthermore, in the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0079] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0080] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0081] Finally, it should be noted that the above embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A clutch drive module, characterized in that, The clutch drive module includes: a power conversion circuit and a solenoid valve drive circuit; One end of the power conversion circuit is used to input power, and the other end is connected to the solenoid valve drive circuit; the power conversion circuit is used to convert the input power into a set voltage and supply power to the solenoid valve drive circuit. The solenoid valve drive circuit includes a signal processing unit, a first on / off control device, a first sampling unit, and a second sampling unit; the first end of the first sampling unit is connected to the first end of the first on / off control device, the second end of the first sampling unit is connected to the first end of the second sampling unit, and the second end of the second sampling unit is grounded. The signal processing unit includes a first signal output terminal, a first sampling terminal, and a second sampling terminal; the first signal output terminal is connected to the second terminal of the first on / off control device, the first sampling terminal is connected between the first terminal of the first sampling unit and the first terminal of the first on / off control device, and the second sampling terminal is connected between the first sampling unit and the second sampling unit. The signal processing unit is used to detect that the first sampling signal obtained from the first sampling terminal matches the second sampling signal obtained from the second sampling terminal, and then the first signal output terminal outputs a first control signal to the first on / off control device to control the first on / off control device to be turned on.

2. The clutch drive module according to claim 1, characterized in that, The solenoid valve drive circuit also includes a first diode. The first diode is connected in parallel across the two ends of the solenoid valve of the clutch; the positive terminal of the first diode is connected to the third terminal of the first on / off control device and the negative terminal of the solenoid valve; the negative terminal of the first diode is connected to the positive terminal of the solenoid valve and the output terminal of the power conversion circuit.

3. The clutch drive module according to claim 2, characterized in that, The first on / off control device includes a first insulated-gate field-effect transistor; the first terminal of the first on / off control device is the source, the second terminal is the gate, and the third terminal is the drain; The gate of the first on / off control device is connected to the first signal output terminal of the signal processing unit; The source of the first on / off control device is connected to the first terminal of the first sampling unit; The drain of the first on / off control device is connected to the negative terminal of the solenoid valve of the clutch and the positive terminal of the first diode, respectively.

4. The clutch drive module according to claim 1, characterized in that, The first sampling unit includes a first current-sensing resistor, and the second sampling unit includes a second current-sensing resistor; The first sampling terminal is used to collect the first current flowing through the first current sensing resistor and the second current sensing resistor, and the second sampling terminal is used to collect the second current flowing through the second current sensing resistor; When the first current matches the second current, the first signal output terminal of the signal processing unit outputs a first control signal to the first on / off control device.

5. The clutch drive module according to claim 4, characterized in that, Matching the first current with the second current includes: the first current being equal to the second current.

6. The clutch drive module according to claim 1, characterized in that, The clutch drive module further includes: a second on / off control device; The second on / off control device is disposed between the power conversion circuit and the power supply; The second on / off control device is used to turn on upon receiving a start signal, energizing the power conversion circuit; and to turn off upon receiving a stop signal, de-energizing the power conversion circuit.

7. The clutch drive module according to claim 6, characterized in that, The clutch drive module further includes: a logic controller; The logic controller is connected to the signal processing unit; The logic controller is configured to: upon receiving the working signal from the signal processing unit, send the start signal to the second on / off controller; and upon receiving the abnormal signal from the signal processing unit, send the stop signal to the second on / off controller.

8. The clutch drive module according to claim 7, characterized in that, The second on / off control device includes a second insulated-gate field-effect transistor; The gate of the second on / off control device is connected to the logic control device; The source of the second on / off control device is connected to the positive terminal of the power supply; The drain of the second on / off control device is connected to the power conversion circuit.

9. The clutch drive module according to claim 1, characterized in that, The power conversion circuit includes: an input capacitor, an inductor, a third on / off control device, a second diode, and an output capacitor; One end of the input capacitor is connected to the positive terminal of the power supply, and the other end is grounded; One end of the inductor is connected to the positive terminal of the power supply and the input capacitor, and the other end is connected to the positive terminal of the second diode and the third on / off control device. One end of the output capacitor is connected to the negative terminal of the second diode and the solenoid valve drive circuit, and the other end is grounded.

10. The clutch drive module according to claim 9, characterized in that, The power conversion circuit further includes: a power drive unit and a third sampling unit; The power drive unit includes a second signal output terminal and a third sampling terminal; the second signal output terminal of the power drive unit is connected to the third on / off control device, and the third sampling terminal is connected between the first terminal of the third sampling unit and the third on / off control device; the second terminal of the third sampling unit is grounded. The power drive unit is used to detect whether the third sampling signal of the third sampling terminal exceeds a preset threshold; according to the third sampling signal, the second signal output terminal of the power drive unit outputs an on / off control signal to the third on / off control device.

11. The clutch drive module according to claim 10, characterized in that, The third on / off control device includes a first insulated-gate field-effect transistor; The gate of the third on / off control device is connected to the second signal output terminal of the power drive unit; The source of the third on / off control device is connected to the first terminal of the third sampling unit; The drain of the third on / off control device is connected to the positive terminal of the inductor and the second diode, respectively.

12. A clutch drive system, characterized in that, The clutch drive system includes the clutch drive module according to any one of claims 1-11, and a clutch; The clutch drive module is connected to the solenoid valve of the clutch.

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