Control method of electromagnetic clutch, electromagnetic clutch and motor controller

Abstract

The embodiment of the invention provides a control method of an electromagnetic clutch, the electromagnetic clutch and a motor controller. The method comprises the steps that a motor controller receives a clutch target mode signal sent by a vehicle control unit; the motor controller outputs a set control voltage to the clutch electromagnetic coil circuit in response to the clutch target mode signal so as to control the electromagnetic clutch; the clutch electromagnetic coil circuit comprises an electromagnetic coil control circuit; the electromagnetic coil control circuit comprises a triode in circuit connection with the control end of the MCU, when the electromagnetic coil control circuit receives the set control voltage, the triode is opened, and an electromagnetic coil of the electromagnetic clutch is powered on; or when the electromagnetic coil control circuit does not receive the set control voltage, the triode is closed, and the electromagnetic coil of the electromagnetic clutch is powered off, so that the control function of integrating the motor controller with the electromagnetic clutch can be realized, the arrangement space of the whole vehicle is not influenced, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a control method of an electromagnetic clutch, an electromagnetic clutch and a motor controller. Background Art

[0002] The hybrid system of a car can realize the working modes of series driving mode and parallel driving mode. The hybrid system can more flexibly adjust the power output of the internal combustion engine and the operation of the motor according to the working conditions. In the hybrid system, the electromagnetic clutch is the core component. However, in the related technology, a separate controller is usually added to control the electromagnetic clutch, which affects the layout space of the whole vehicle and increases the cost. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides an electromagnetic clutch control method, an electromagnetic clutch and a motor controller to realize the control function of the tooth-type electromagnetic clutch integrated into the motor controller of an integrated hybrid power-specific transmission, which will not affect the layout space of the entire vehicle and reduce costs.

[0004] On the one hand, an embodiment of the present invention provides a control method of an electromagnetic clutch, comprising: The motor controller receives a clutch target mode signal sent by the vehicle controller; The motor controller outputs a set control voltage to a clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch; Wherein, the clutch electromagnetic coil circuit includes: an electromagnetic coil control circuit; The electromagnetic coil control circuit includes a transistor connected to the MCU control end circuit. When the electromagnetic coil control circuit receives a set control voltage, the transistor is turned on and the electromagnetic coil of the electromagnetic clutch is energized; or, When the electromagnetic coil control circuit does not receive the set control voltage, the transistor is turned off and the electromagnetic coil of the electromagnetic clutch is de-energized.

[0005] Optionally, the clutch target mode signal includes a clutch closing signal, and before the motor controller receives the clutch target mode signal sent by the vehicle controller, the process includes: The vehicle controller determines a driving mode of the vehicle, and when the vehicle controller determines that the vehicle needs to switch from a series driving mode to a parallel driving mode, the motor controller receives the clutch closing signal sent by the vehicle controller; Among them, when the vehicle speed is greater than the first set threshold, the throttle opening is less than the second set threshold, the battery power is less than the third set threshold and the clutch is not faulty, the vehicle controller determines that the vehicle needs to switch from the series driving mode to the parallel driving mode.

[0006] Optionally, the electromagnetic clutch comprises an electromagnetic coil, a push ring, a tooth plate and a clutch gear, and the motor controller outputs a set control voltage to the clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch, including: The motor controller controls the electromagnetic coil control circuit to receive a first control voltage in response to the closed clutch signal, the transistor opens, outputs a first set current to the electromagnetic clutch, and the electromagnetic coil is energized to push the push ring so that the toothed disk engages with the clutch gear.

[0007] Optionally, the clutch target mode signal includes a clutch holding signal, and before the motor controller receives the clutch target mode signal sent by the vehicle controller, the process includes: The vehicle controller determines the driving mode of the vehicle. When the vehicle controller determines that the vehicle enters the parallel driving mode, the motor controller receives the holding clutch signal sent by the vehicle controller.

[0008] Optionally, the electromagnetic clutch comprises an electromagnetic coil, a push ring, a tooth plate and a clutch gear, and the motor controller outputs a set control voltage to the clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch, including: The motor controller controls the electromagnetic coil control circuit to receive a second control voltage in response to the holding clutch signal, the transistor is turned on, and a second set current is output to the electromagnetic clutch, and the electromagnetic coil is energized to maintain the electromagnetic force required for the tooth plate to engage with the clutch gear.

[0009] Optionally, the clutch target mode signal includes a clutch opening signal, and before the motor controller receives the clutch target mode signal sent by the vehicle controller, the process includes: The vehicle controller determines a driving mode of the vehicle, and when the vehicle controller determines that the vehicle needs to switch from a parallel driving mode to a series driving mode, the motor controller receives the clutch opening signal sent by the vehicle controller; When the vehicle speed is less than a fourth set threshold, the vehicle controller determines that the vehicle needs to switch from the parallel driving mode to the series driving mode.

[0010] Optionally, the electromagnetic clutch comprises an electromagnetic coil, a push ring, a tooth plate and a clutch gear, and the outputting of a set control voltage to the clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch comprises: In response to the clutch opening signal, the motor controller controls the electromagnetic coil control circuit to stop receiving voltage, the transistor is turned off, and the output current to the electromagnetic clutch is stopped. The electromagnetic coil stops being energized, the push ring rebounds under the action of the spring, and the toothed disk disengages from the clutch gear.

[0011] On the other hand, an embodiment of the present invention provides an electromagnetic clutch, including a clutch electromagnetic coil circuit; The clutch electromagnetic coil circuit includes: an electromagnetic coil control circuit; The electromagnetic coil control circuit includes a transistor connected to the MCU control end circuit. When the electromagnetic coil control circuit receives a set control voltage, the transistor is turned on and the electromagnetic coil of the electromagnetic clutch is energized; or, When the electromagnetic coil control circuit does not receive the set control voltage, the transistor is turned off and the electromagnetic coil of the electromagnetic clutch is de-energized.

[0012] Optionally, the clutch electromagnetic coil circuit further includes: an MCU control terminal circuit; The MCU control terminal circuit includes a four-input AND gate and a two-input AND gate. When the voltage of the MCU control terminal is greater than or equal to a set voltage threshold, the four-input AND gate outputs a first voltage, and amplifies the output through the two-input AND gate to turn on the transistor; or When the voltage at the MCU control terminal is less than a set voltage threshold, the four-input AND gate does not output a voltage and turns off the transistor.

[0013] On the other hand, an embodiment of the present invention provides a motor controller, which is applied to the control method of the electromagnetic clutch, including: The motor controller is communicatively connected with the vehicle controller, and an electromagnetic clutch is integrated in the motor controller, and the electromagnetic clutch includes a clutch electromagnetic coil circuit.

[0014] In the technical solution of the electromagnetic clutch control method provided in an embodiment of the present invention, the method includes: a motor controller receives a clutch target mode signal sent by a vehicle controller; the motor controller outputs a set control voltage to the clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch; wherein the clutch electromagnetic coil circuit includes: an electromagnetic coil control circuit; the electromagnetic coil control circuit includes a transistor connected to the MCU control end circuit, when the electromagnetic coil control circuit receives the set control voltage, the transistor is turned on, and the electromagnetic coil of the electromagnetic clutch is energized; or, when the electromagnetic coil control circuit does not receive the set control voltage, the transistor is turned off, and the electromagnetic coil of the electromagnetic clutch is de-energized, so that the control function of the electromagnetic clutch integrated into the motor controller can be realized, which will not affect the layout space of the whole vehicle and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of the structure of an electromagnetic clutch provided in an embodiment of the present invention; Figure 2 A flow chart of a control method of an electromagnetic clutch provided by one embodiment of the present invention; Figure 3 A schematic diagram of the structure of a clutch electromagnetic coil circuit provided by one embodiment of the present invention; Figure 4 A flow chart of another electromagnetic clutch control method provided by one embodiment of the present invention; Figure 5 A schematic diagram of an electromagnetic clutch provided by an embodiment of the present invention; Figure 6 A schematic diagram of a motor controller connection relationship provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0018] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0020] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0021] An embodiment of the present invention provides an electromagnetic clutch. Figure 1 A schematic diagram of the structure of an electromagnetic clutch provided in an embodiment of the present invention is shown in FIG. Figure 1 As shown, the electromagnetic clutch can be a tooth-type electromagnetic clutch, which includes a clutch gear 1, a tooth plate 2, a clutch shaft 3, a push ring 4 and an electromagnetic coil 5. The controller can output a control current to energize the electromagnetic coil 5, push the push ring 4, and make the tooth plate 2 and the clutch gear 1 engage, so as to achieve the purpose of switching from the series driving mode to the parallel driving mode; on the contrary, the controller stops outputting the control current, the push ring 4 retreats under the action of the spring, and the tooth plate 2 and the clutch gear 1 are disengaged, so that the parallel driving mode can be switched back to the series driving mode.

[0022] Based on the above electromagnetic clutch, an embodiment of the present invention provides a control method of the electromagnetic clutch. Figure 2 A flow chart of a control method of an electromagnetic clutch provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the method includes: Step 102: The motor controller receives a clutch target mode signal sent by the vehicle controller.

[0023] Step 104 : The motor controller outputs a set control voltage to the clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch.

[0024] In an embodiment of the present invention, the clutch electromagnetic coil circuit includes: an electromagnetic coil control circuit. The electromagnetic coil control circuit includes a transistor connected to the MCU control end circuit, when the electromagnetic coil control circuit receives a set control voltage, the transistor is turned on, and the electromagnetic coil of the electromagnetic clutch is energized; or, when the electromagnetic coil control circuit does not receive the set control voltage, the transistor is turned off, and the electromagnetic coil of the electromagnetic clutch is de-energized.

[0025] Figure 3 A schematic diagram of a clutch electromagnetic coil circuit according to an embodiment of the present invention is shown in FIG. Figure 3 As shown, the clutch electromagnetic coil circuit includes: an MCU control end circuit, an electromagnetic coil control circuit, a voltage stabilization circuit, an amplification circuit, a voltage comparison circuit and a current recovery circuit.

[0026] Among them, in the MCU control end circuit, the MCU_PWM_ACU port is connected to the MCU, the P3V3_DIG port is connected to the power supply voltage, the MCU_PWM_ACU port and the P3V3_DIG port are connected to the four-input AND gate, and the four-input AND gate is connected to the two-input AND gate, wherein the four-input AND gate includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a second capacitor C2 and a first comparator U1, wherein the MCU_PWM_ACU port is connected to the second resistor R2, and the second resistor R2 is connected to the first comparator The first comparator U1 is connected to the "+" port of the first comparator U1, the first resistor R1 is grounded and the first resistor R1 is respectively connected to the second resistor R2 and the "+" port of the first comparator U1, the P3V3_DIG port is connected to the third resistor R3, the third resistor R3 is respectively connected to the fourth resistor R4, the second capacitor C2 and the "-" port of the first comparator U1, the fourth resistor R4 is connected in parallel with the second capacitor C2, the fourth resistor R4 and the second capacitor C2 are grounded, one end of the first comparator U1 is connected to the P5V_CAN port, one end of which is grounded, and the other end is connected to the two-input AND gate. Among them, the two-input AND gate includes a fifth resistor R5 and an AND gate component Y1, the output end of the first comparator U1 is respectively connected to the fifth resistor R5 and the AND gate component Y1, the fifth resistor R5 is grounded, the fifth resistor R5 is connected to the AND gate component Y1, the AND gate component Y1 is connected to the sixth resistor R6, the sixth resistor R6 is respectively connected to the seventh resistor R7 and the first capacitor C1, and the seventh resistor R7 and the first capacitor C1 are connected in parallel. When the voltage at the MCU control terminal is less than the voltage of P3V3_DIG, the four-input AND gate outputs a 0V voltage and transistor Q1 is turned off; when the voltage at the MCU control terminal is greater than or equal to the voltage of P3V3_DIG, the four-input AND gate outputs a 5V voltage and amplifies the output capacity through the two-input AND gate with lower power consumption, and transistor Q1 is turned on.

[0027] The electromagnetic coil control circuit includes: a voltage stabilizing diode D1, a transistor Q1 and a transformer T1. The P18V_ACU port is connected to the voltage stabilizing diode D1 and one end of the transformer T1 respectively, and the other two ends of the transformer T1 are connected to the VALVE_H2 port and the VALVE_L2 port respectively. The other end of the voltage stabilizing diode D1 is connected to the drain of the transistor Q1 and one end of the transformer T1 respectively, and one end of the first capacitor C1 is connected to the gate of the transistor Q1. The VALVE_H2 port and the VALVE_L2 port are connected to the electromagnetic coil, and the high side (VALVE_H2 port) is always connected to the 18V power supply and filtered through the transformer T1. When the transistor Q1 is turned on, the electromagnetic coil is energized, thereby achieving the purpose of controlling the electromagnetic coil.

[0028] In an embodiment of the present invention, when the P18V_ACU port of the electromagnetic coil control circuit receives a set control voltage, the transistor Q1 is turned on and the electromagnetic coil of the electromagnetic clutch is energized; or, when the P18V_ACU port of the electromagnetic coil control circuit does not receive the set control voltage, the transistor Q1 is turned off and the electromagnetic coil of the electromagnetic clutch is de-energized.

[0029] The voltage stabilization circuit, the amplification circuit, the voltage comparison circuit and the current recovery circuit together constitute a diagnostic circuit, wherein the voltage stabilization circuit is used to output a fixed voltage, and the voltage stabilization circuit includes: a second comparator U2, a ninth resistor R9, a tenth resistor R10, a fourth capacitor C4, a fifth capacitor C5 and an eleventh resistor R11. The P3V32_VCCA port is connected to the ninth resistor R9, the ninth resistor R9 is respectively connected to the tenth resistor R10, the fourth capacitor C4 and the "+" port of the second comparator U2, the tenth resistor R10 is connected in parallel with the fourth capacitor C4, the tenth resistor R10 and the fourth capacitor C4 are grounded, one end of the second comparator U2 is connected to the P3V3_VCCA port, one end of the second comparator U2 is grounded, the "-" port of the second comparator U2 is respectively connected to the fifth capacitor C5 and the eleventh resistor R11, and the fifth capacitor C5 is connected in parallel with the eleventh resistor R11.

[0030] The amplifier circuit includes: a third capacitor C3, an eighth resistor R8, a sixth capacitor C6, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, an eighteenth resistor R18, a nineteenth resistor R19, a third comparator U3 and a seventh capacitor C7. The source of the transistor Q1 is connected to the first capacitor C1, the thirteenth resistor R13 and the fourteenth resistor R14 respectively, the fourteenth resistor R14 is connected to the fifteenth resistor R15, the fifteenth resistor R15 is grounded and connected to the sixteenth resistor R16, the sixteenth resistor R16 is connected to the "-" port of the third comparator U3, the eighteenth resistor R18 and the seventh capacitor C7 respectively, the eighteenth resistor R18 is connected to the seventh capacitor C7 in parallel, the eighteenth resistor R18 is connected to the nineteenth resistor R19, the nineteenth resistor R19 is grounded, one end of the third comparator U3 is connected to the P3V33_VCCA port, one end of the third comparator U3 is grounded, the "+" port of the third comparator U3 is connected to the thirteenth resistor R13, the twelfth resistor R12 and the sixth capacitor C6 respectively, the twelfth resistor R12 is connected to the sixth capacitor C6 in parallel, the twelfth resistor R12 and the sixth capacitor C6 are connected to the eighth resistor and the third capacitor C3, the eighth resistor R8 is connected to the output end of the second comparator U2, and the third capacitor C3 is grounded.

[0031] The voltage comparison circuit includes: a seventeenth resistor R17, a twentieth resistor R20, an eighth capacitor C8, a fourth comparator U4, a twenty-first resistor R21, a twenty-second resistor R22 and a ninth capacitor C9. The seventeenth resistor R17 is connected to the P3V34_VCCA port, the twentieth resistor R20, the eighth capacitor C8 and the “+” port of the fourth comparator U4, the twentieth resistor R20 is connected in parallel with the eighth capacitor C8 and is grounded, one end of the fourth comparator U4 is connected to the P5V2_CAN port, one end of the fourth comparator U4 is grounded, the “-” port of the fourth comparator U4 is respectively connected to the twenty-second resistor R22 and the ninth capacitor C9, the twenty-second resistor R22 is respectively connected to the output end of the third comparator U3, the eighteenth resistor R18, the nineteenth resistor R19 and the seventh capacitor C7, the ninth capacitor C9 is grounded, the output end of the fourth comparator U4 is respectively connected to the twenty-first resistor R21 and the ACU_OC_N43 port, and the twenty-first resistor R21 is connected to the P3V23_DIG port. When the clutch electromagnetic coil has no fault, the amplifier circuit outputs a voltage to the negative input terminal of the voltage comparison circuit, and compares it with the positive input terminal of the voltage comparison circuit. When the negative input terminal of the voltage comparison circuit is less than the positive input terminal of the voltage comparison circuit, a 5V voltage is input to the ACU_OC_N43 port. In the embodiment of the present invention, in addition to the integrated output control current function, the motor controller also integrates the electromagnetic clutch diagnosis protection control function. In addition to the diagnosis of conventional communication message loss, high power supply voltage, and low power supply voltage, it also diagnoses the electromagnetic clutch short circuit, the electromagnetic clutch high side short circuit to ground, and the electromagnetic clutch low side short circuit to the power supply. If there is a short circuit in the electromagnetic coil control circuit, the negative input terminal of the voltage comparison circuit is greater than the positive input terminal of the voltage comparison circuit, and a 0V voltage is input to the ACU_OC_N43 port. The motor controller reports a fault signal to the MCU, and at the same time, it may not respond to the clutch target mode signal issued by the vehicle controller, stop outputting current, and feedback the clutch opening clutch signal until the next electromagnetic clutch is closed. The process is restored.

[0032] The current recovery circuit includes: a twenty-third resistor R23, a tenth capacitor C10 and an eleventh capacitor C11, the twenty-third resistor R23 is respectively connected to the nineteenth resistor R19, the eighteenth resistor R18, the seventh capacitor C7, the twenty-second resistor R22, the tenth capacitor C10, the eleventh capacitor C11 and the IACU_ADC9 port, and the tenth capacitor C10 is connected in parallel with the eleventh capacitor C11 and grounded. The current recovery circuit collects the current value to control and adjust the MCU_PWM_ACU port. If the electromagnetic coil control circuit is open, the current recovery circuit recovers the current of 0, which is inconsistent with the output comparison of the MCU_PWM_ACU port, and the motor controller reports a fault signal to the MCU. The clutch electromagnetic coil circuit provided in the embodiment of the present invention can play a role in controlling the electromagnetic coil current in the control method of the electromagnetic clutch. When the electromagnetic coil is not energized, the push ring is not subjected to electromagnetic force, and is only subjected to the spring force to maintain the initial position, and the clutch is in an open state. When the electromagnetic coil is energized, the push ring is subjected to electromagnetic force, and the electromagnetic force is greater than the spring force, the push ring moves forward, and the clutch is closed. Compared with the existing split technology, the control method of the electromagnetic clutch is integrated into the motor controller, the software logic is simpler, the hardware shares some chips, and the cost is reduced.

[0033] In the technical solution provided by the embodiment of the present invention, the method includes: the motor controller receives the clutch target mode signal sent by the vehicle controller; the motor controller outputs a set control voltage to the clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch; wherein the clutch electromagnetic coil circuit includes: an electromagnetic coil control circuit; the electromagnetic coil control circuit includes a transistor connected to the MCU control end circuit, when the electromagnetic coil control circuit receives the set control voltage, the transistor is turned on, and the electromagnetic coil of the electromagnetic clutch is energized; or, when the electromagnetic coil control circuit does not receive the set control voltage, the transistor is turned off, and the electromagnetic coil of the electromagnetic clutch is de-energized, so that the control function of the electromagnetic clutch integrated into the motor controller can be realized, which will not affect the layout space of the whole vehicle and reduce costs.

[0034] An embodiment of the present invention provides another control method of an electromagnetic clutch. Figure 4 A flow chart of another electromagnetic clutch control method provided by an embodiment of the present invention, such as Figure 4 As shown, the method includes: Step 202, the vehicle controller determines the driving mode of the vehicle. When the vehicle controller determines that the vehicle needs to switch from the series driving mode to the parallel driving mode, step 204 is executed; when the vehicle controller determines that the vehicle needs to switch from the parallel driving mode to the series driving mode, step 212 is executed.

[0035] Step 204, the motor controller receives the clutch closing signal sent by the vehicle controller, wherein, when the vehicle speed is greater than the first set threshold, the throttle opening is less than the second set threshold, the battery power is less than the third set threshold and the clutch is not faulty, the vehicle controller determines that the vehicle needs to switch from the series driving mode to the parallel driving mode.

[0036] In the embodiment of the present invention, the first set threshold, the second set threshold, and the third set threshold can be set according to actual conditions. For example, the first set threshold can be 85 km / h, the second set threshold can be 80%, and the third set threshold can be 60%.

[0037] Step 206, the motor controller controls the electromagnetic coil control circuit to receive the first control voltage in response to the clutch closing signal, the transistor is turned on, and the first set current is output to the electromagnetic clutch, and the electromagnetic coil is energized to push the push ring so that the tooth plate is engaged with the clutch gear.

[0038] In the embodiment of the present invention, the schematic diagram of the structure of the clutch electromagnetic coil circuit is as follows: Figure 3 As shown, no further description is given here.

[0039] In the embodiment of the present invention, the first control voltage and the first set current can be set according to actual conditions. For example, the first control voltage is 18V, and the first set current is 3.8A (±0.1A).

[0040] In an embodiment of the present invention, the motor controller controls the P18V_ACU port of the electromagnetic coil control circuit to receive a first control voltage in response to a closed clutch signal, and the transistor Q1 is turned on to output a first set current to the electromagnetic clutch. The electromagnetic coil is energized to push the push ring, so that the tooth plate engages with the clutch gear, and the closed clutch signal is fed back.

[0041] Step 208: When the vehicle controller determines that the vehicle enters the parallel driving mode, the motor controller receives a clutch holding signal sent by the vehicle controller.

[0042] In an embodiment of the present invention, when the vehicle speed, battery power, and throttle opening meet the requirements, in order to meet the driving needs of the driver, the vehicle controller sends a clutch holding signal and controls the speed of the front and rear motors of the clutch so that the speed difference between the front and rear motors of the clutch is less than a certain range, which is convenient for the clutch to close. In order to prevent the motor controller from outputting a large current for a long time and causing the electromagnetic clutch coil to overheat, the motor controller integrates the overheating protection control function of the electromagnetic clutch. If the speed difference between the front and rear motors of the clutch is not smoothly adjusted to less than a certain range, the vehicle controller sends a clutch closing signal for more than 5 seconds, the motor controller stops outputting current, the feedback clutch closing signal times out, and jumps to a clutch opening signal after 5 signal cycles. At the same time, the vehicle controller needs to jump back to the clutch opening signal until the vehicle controller sends a clutch opening signal, and the motor controller no longer responds to the signal.

[0043] Step 210, the motor controller controls the electromagnetic coil control circuit to receive the second control voltage in response to the clutch holding signal, the transistor is turned on, and the second set current is output to the electromagnetic clutch, and the electromagnetic coil is energized to maintain the electromagnetic force required for the tooth plate to engage with the clutch gear.

[0044] In the embodiment of the present invention, the second control voltage and the second set current can be set according to actual conditions. For example, the second control voltage is 12V, and the second set current is 2.4A (±0.1A).

[0045] In an embodiment of the present invention, the motor controller controls the P18V_ACU port of the electromagnetic coil control circuit in response to the clutch holding signal to receive a second control voltage, the transistor Q1 is turned on to output a second set current to the electromagnetic clutch, the electromagnetic coil is energized to maintain the electromagnetic force required for the tooth plate to engage with the clutch gear, and the clutch holding signal is fed back.

[0046] In the embodiment of the present invention, after executing step 210, the process may return to executing step 202.

[0047] Step 212: The motor controller receives a clutch opening signal sent by the vehicle controller, wherein when the vehicle speed is less than a fourth set threshold, the vehicle controller determines that the vehicle needs to switch from the parallel driving mode to the series driving mode.

[0048] In the embodiment of the present invention, the fourth set threshold can be set according to actual conditions. For example, the fourth set threshold may be 65 km / h.

[0049] Step 214, in response to the clutch opening signal, the motor controller controls the electromagnetic coil control circuit to stop receiving voltage, the transistor is closed, and the output current to the electromagnetic clutch is stopped. The electromagnetic coil stops being energized, the push ring rebounds under the action of the spring, and the toothed plate is disengaged from the clutch gear.

[0050] In an embodiment of the present invention, the motor controller controls the P18V_ACU port of the electromagnetic coil control circuit to stop receiving voltage in response to the clutch opening signal, the transistor Q1 is turned off, the output current to the electromagnetic clutch is stopped, the electromagnetic coil stops being energized, the push ring rebounds under the action of the spring, the tooth plate disengages from the clutch gear, and the clutch opening signal is fed back.

[0051] In the embodiment of the present invention, after executing step 214, the process may return to executing step 202.

[0052] In the technical solution provided by the embodiment of the present invention, the method includes: the motor controller receives the clutch target mode signal sent by the vehicle controller; the motor controller outputs a set control voltage to the clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch; wherein the clutch electromagnetic coil circuit includes: an electromagnetic coil control circuit; the electromagnetic coil control circuit includes a transistor connected to the MCU control end circuit, when the electromagnetic coil control circuit receives the set control voltage, the transistor is turned on, and the electromagnetic coil of the electromagnetic clutch is energized; or, when the electromagnetic coil control circuit does not receive the set control voltage, the transistor is turned off, and the electromagnetic coil of the electromagnetic clutch is de-energized, so that the control function of the electromagnetic clutch integrated into the motor controller can be realized, which will not affect the layout space of the whole vehicle and reduce costs.

[0053] The technical solution provided by the embodiment of the present invention is simple and reliable, and provides a new technical route for integrating the electromagnetic clutch control function into a hybrid power-specific transmission.

[0054] The technical solution provided by the embodiment of the present invention integrates the control function of the electromagnetic clutch into the motor controller, eliminating the need to develop a single electromagnetic clutch controller, reducing parts costs and material management costs, and saving layout space.

[0055] The technical solution provided by the embodiment of the present invention integrates the control function of the electromagnetic clutch into the motor controller, reduces the repetitive work of software development, diagnostic development, CAN bus development, and functional testing, improves development efficiency, and reduces development costs.

[0056] The technical solution provided by the embodiment of the present invention enables the control function of the electromagnetic clutch to be arranged in a motor controller with water channel cooling, thereby effectively preventing the control circuit from overheating and reducing the probability of failure.

[0057] An embodiment of the present invention provides an electromagnetic clutch. Figure 5 A schematic diagram of an electromagnetic clutch provided by an embodiment of the present invention is shown in FIG. Figure 5As shown, the electromagnetic clutch 20 includes the above-mentioned clutch electromagnetic coil circuit 30, wherein the clutch electromagnetic coil circuit includes: an electromagnetic coil control circuit; the electromagnetic coil control circuit includes a transistor connected to the MCU control end circuit, when the electromagnetic coil control circuit receives a set control voltage, the transistor opens, and the electromagnetic coil of the electromagnetic clutch is energized; or, when the electromagnetic coil control circuit does not receive the set control voltage, the transistor closes, and the electromagnetic coil of the electromagnetic clutch is de-energized.

[0058] In an embodiment of the present invention, the clutch electromagnetic coil circuit also includes: an MCU control end circuit, the MCU control end circuit includes a four-input AND gate and a two-input AND gate, when the MCU control end voltage is greater than or equal to the set voltage threshold, the four-input AND gate outputs a first voltage, and amplifies the output through the two-input AND gate to turn on the transistor; or, when the MCU control end voltage is less than the set voltage threshold, the four-input AND gate does not output voltage and turns off the transistor.

[0059] In the embodiment of the present invention, the clutch electromagnetic coil circuit 30 is as follows Figure 3 As shown, no further description is given here.

[0060] The embodiment of the present invention provides a motor controller, which is applied to the control method of the electromagnetic clutch. Figure 6 A schematic diagram of a motor controller connection relationship provided by an embodiment of the present invention, such as Figure 6 As shown, the motor controller 10 is in communication connection with the vehicle controller 40 , and an electromagnetic clutch 20 is integrated in the motor controller 10 , and the electromagnetic clutch 20 includes a clutch electromagnetic coil circuit 30 .

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control method for an electromagnetic clutch, characterized in that: include: The motor controller receives a clutch target mode signal sent by the vehicle controller; The motor controller outputs a set control voltage to a clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch; Wherein, the clutch electromagnetic coil circuit includes: an electromagnetic coil control circuit; The electromagnetic coil control circuit includes a transistor connected to the MCU control end circuit. When the electromagnetic coil control circuit receives a set control voltage, the transistor is turned on and the electromagnetic coil of the electromagnetic clutch is energized; or, When the electromagnetic coil control circuit does not receive the set control voltage, the transistor is turned off and the electromagnetic coil of the electromagnetic clutch is de-energized.

2. The method according to claim 1, characterized in that The clutch target mode signal includes a clutch closing signal, and before the motor controller receives the clutch target mode signal sent by the vehicle controller, it includes: The vehicle controller determines a driving mode of the vehicle, and when the vehicle controller determines that the vehicle needs to switch from a series driving mode to a parallel driving mode, the motor controller receives the clutch closing signal sent by the vehicle controller; Among them, when the vehicle speed is greater than the first set threshold, the throttle opening is less than the second set threshold, the battery power is less than the third set threshold and the clutch is not faulty, the vehicle controller determines that the vehicle needs to switch from the series driving mode to the parallel driving mode.

3. The method according to claim 2, characterized in that The electromagnetic clutch comprises an electromagnetic coil, a push ring, a tooth plate and a clutch gear. The motor controller outputs a set control voltage to the clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch, including: The motor controller controls the electromagnetic coil control circuit to receive a first control voltage in response to the closed clutch signal, the transistor opens, outputs a first set current to the electromagnetic clutch, and the electromagnetic coil is energized to push the push ring so that the toothed disk engages with the clutch gear.

4. The method according to claim 1, characterized in that: The clutch target mode signal includes a clutch holding signal, and before the motor controller receives the clutch target mode signal sent by the vehicle controller, it includes: The vehicle controller determines the driving mode of the vehicle. When the vehicle controller determines that the vehicle enters the parallel driving mode, the motor controller receives the holding clutch signal sent by the vehicle controller.

5. The method according to claim 4, characterized in that The electromagnetic clutch comprises an electromagnetic coil, a push ring, a tooth plate and a clutch gear. The motor controller outputs a set control voltage to the clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch, including: The motor controller controls the electromagnetic coil control circuit to receive a second control voltage in response to the holding clutch signal, the transistor is turned on, and a second set current is output to the electromagnetic clutch, and the electromagnetic coil is energized to maintain the electromagnetic force required for the tooth plate to engage with the clutch gear.

6. The method according to claim 1, characterized in that The clutch target mode signal includes a clutch opening signal, and before the motor controller receives the clutch target mode signal sent by the vehicle controller, it includes: The vehicle controller determines a driving mode of the vehicle, and when the vehicle controller determines that the vehicle needs to switch from a parallel driving mode to a series driving mode, the motor controller receives the clutch opening signal sent by the vehicle controller; When the vehicle speed is less than a fourth set threshold, the vehicle controller determines that the vehicle needs to switch from the parallel driving mode to the series driving mode.

7. The method according to claim 6, characterized in that The electromagnetic clutch comprises an electromagnetic coil, a push ring, a tooth plate and a clutch gear, and the output of a set control voltage to the clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch comprises: In response to the clutch opening signal, the motor controller controls the electromagnetic coil control circuit to stop receiving voltage, the transistor is turned off, and the output current to the electromagnetic clutch is stopped. The electromagnetic coil stops being energized, the push ring rebounds under the action of the spring, and the toothed disk disengages from the clutch gear.

8. An electromagnetic clutch, characterized in that: including a clutch solenoid circuit; The clutch electromagnetic coil circuit includes: an electromagnetic coil control circuit; The electromagnetic coil control circuit includes a transistor connected to the MCU control end circuit. When the electromagnetic coil control circuit receives a set control voltage, the transistor is turned on and the electromagnetic coil of the electromagnetic clutch is energized; or, When the electromagnetic coil control circuit does not receive the set control voltage, the transistor is turned off and the electromagnetic coil of the electromagnetic clutch is de-energized.

9. The electromagnetic clutch according to claim 8, characterized in that: The clutch electromagnetic coil circuit also includes: an MCU control terminal circuit; The MCU control terminal circuit includes a four-input AND gate and a two-input AND gate. When the voltage of the MCU control terminal is greater than or equal to a set voltage threshold, the four-input AND gate outputs a first voltage, and amplifies the output through the two-input AND gate to turn on the transistor; or When the voltage at the MCU control terminal is less than a set voltage threshold, the four-input AND gate does not output a voltage and turns off the transistor.

10. A motor controller, characterized in that: The control method of the electromagnetic clutch according to any one of claims 1 to 7 comprises: The motor controller is communicatively connected with the vehicle controller, and an electromagnetic clutch is integrated in the motor controller, and the electromagnetic clutch includes a clutch electromagnetic coil circuit.

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