A control method of an electromagnetic clutch, an electromagnetic clutch, and a motor controller

Abstract

The embodiment of the application provides a kind of electromagnetic clutch control method, electromagnetic clutch and motor controller.The method comprises: motor controller receives clutch target mode signal sent by whole vehicle controller;Motor controller responds to clutch target mode signal and outputs set control voltage to clutch electromagnetic coil circuit, to control electromagnetic clutch;Wherein, clutch electromagnetic coil circuit includes: electromagnetic coil control circuit;Electromagnetic coil control circuit includes triode connected with MCU control end circuit, when electromagnetic coil control circuit receives set control voltage, triode opens, and electromagnetic clutch electromagnetic coil is energized;Or, when electromagnetic coil control circuit does not receive set control voltage, triode is closed, and electromagnetic clutch electromagnetic coil is de-energized, can realize the control function of motor controller integrated electromagnetic clutch, without affecting the layout space of whole vehicle and reducing cost.

Description

Technical Field

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

[0002] Hybrid systems in automobiles can operate in both series and parallel driving modes. They offer greater flexibility in adjusting the power output of the internal combustion engine and the operation of the electric motor based on driving conditions. The electromagnetic clutch is a core component of a hybrid system. However, related technologies typically require a separate controller to operate the electromagnetic clutch, impacting the vehicle's layout and increasing costs. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a control method for an electromagnetic clutch, an electromagnetic clutch, and a motor controller, to realize the control function of a jaw-type electromagnetic clutch integrated into the motor controller of an integrated hybrid power transmission, without affecting the overall vehicle layout space and reducing costs.

[0004] On one hand, embodiments of the present invention provide a control method for an electromagnetic clutch, including:

[0005] The motor controller receives the clutch target mode signal sent by the vehicle controller;

[0006] The motor controller outputs a set control voltage to the clutch solenoid coil circuit in response to the clutch target mode signal, so as to control the electromagnetic clutch;

[0007] The clutch electromagnetic coil circuit includes: an electromagnetic coil control circuit;

[0008] The electromagnetic coil control circuit includes a transistor connected to the MCU control circuit. When the electromagnetic coil control circuit receives a set control voltage, the transistor turns on, energizing the electromagnetic coil of the electromagnetic clutch; or...

[0009] 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.

[0010] Optionally, the clutch target mode signal includes a clutch engagement signal, and before the motor controller receives the clutch target mode signal sent by the vehicle controller, it includes:

[0011] The vehicle controller determines the vehicle's driving mode. 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 engagement signal sent by the vehicle controller.

[0012] Specifically, when the vehicle speed is greater than a first set threshold, the throttle opening is less than a second set threshold, the battery charge is less than a third set threshold, and the clutch is not malfunctioning, the vehicle controller determines that the vehicle needs to switch from the series driving mode to the parallel driving mode.

[0013] Optionally, the electromagnetic clutch includes an electromagnetic coil, a push ring, a jaw disc, and a clutch gear. The motor controller, in response to the clutch target mode signal, outputs a set control voltage to the clutch electromagnetic coil circuit to control the electromagnetic clutch, including:

[0014] In response to the closed clutch signal, the motor controller controls the electromagnetic coil control circuit to receive a first control voltage, the transistor turns on, outputs a first set current to the electromagnetic clutch, and the electromagnetic coil is energized to push the push ring, so that the toothed disc engages with the clutch gear.

[0015] Optionally, the clutch target mode signal includes a holding clutch signal, and before the motor controller receives the clutch target mode signal sent by the vehicle controller, it includes:

[0016] The vehicle controller determines the vehicle's driving mode. When the vehicle controller determines that the vehicle has entered the parallel driving mode, the motor controller receives the holding clutch signal sent by the vehicle controller.

[0017] Optionally, the electromagnetic clutch includes an electromagnetic coil, a push ring, a jaw disc, and a clutch gear. The motor controller, in response to the clutch target mode signal, outputs a set control voltage to the clutch electromagnetic coil circuit to control the electromagnetic clutch, including:

[0018] In response to the holding clutch signal, the motor controller controls the electromagnetic coil control circuit to receive a second control voltage, the transistor turns on, outputs a second set current to the electromagnetic clutch, and the electromagnetic coil is energized to maintain the electromagnetic force required for the engagement of the jaw disc and the clutch gear.

[0019] Optionally, the clutch target mode signal includes a clutch engagement signal, and before the motor controller receives the clutch target mode signal sent by the vehicle controller, it includes:

[0020] The vehicle controller determines the vehicle's driving mode. When the vehicle controller determines that the vehicle needs to switch from parallel driving mode to series driving mode, the motor controller receives the clutch engagement signal sent by the vehicle controller.

[0021] When the vehicle speed is less than the fourth preset threshold, the vehicle controller determines that the vehicle needs to switch from parallel driving mode to series driving mode.

[0022] Optionally, the electromagnetic clutch includes an electromagnetic coil, a push ring, a jaw disc, and a clutch gear. The step of outputting a set control voltage to the clutch electromagnetic coil circuit in response to the clutch target mode signal to control the electromagnetic clutch includes:

[0023] In response to the clutch engagement signal, the motor controller controls the electromagnetic coil control circuit to stop receiving voltage, the transistor to turn off, the current output to the electromagnetic clutch to stop, the electromagnetic coil to stop being energized, the push ring to rebound under the force of the spring, and the jaw disc to disengage from the clutch gear.

[0024] On the other hand, embodiments of the present invention provide an electromagnetic clutch, including a clutch electromagnetic coil circuit;

[0025] The clutch electromagnetic coil circuit includes: an electromagnetic coil control circuit;

[0026] The electromagnetic coil control circuit includes a transistor connected to the MCU control circuit. When the electromagnetic coil control circuit receives a set control voltage, the transistor turns on, energizing the electromagnetic coil of the electromagnetic clutch; or...

[0027] 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.

[0028] Optionally, the clutch electromagnetic coil circuit further includes: an MCU control terminal circuit;

[0029] The MCU control circuit includes a four-input AND gate and a two-input AND gate. When the MCU control voltage is greater than or equal to a set voltage threshold, the four-input AND gate outputs a first voltage, which is amplified by the two-input AND gate to turn on the transistor; or...

[0030] When the voltage at the MCU control terminal is less than the set voltage threshold, the four-input AND gate does not output voltage and turns off the transistor.

[0031] On the other hand, embodiments of the present invention provide a motor controller applied to the control method of the above-mentioned electromagnetic clutch, including:

[0032] The motor controller is communicatively connected to the vehicle controller. The motor controller integrates an electromagnetic clutch, which includes a clutch electromagnetic coil circuit.

[0033] The technical solution of the electromagnetic clutch control method provided in this embodiment of the invention includes: a motor controller receiving a clutch target mode signal sent by a vehicle controller; the motor controller outputting 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 terminal circuit, when the electromagnetic coil control circuit receives the set control voltage, the transistor turns 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 turns off, and the electromagnetic coil of the electromagnetic clutch is de-energized, which can realize the control function of the electromagnetic clutch integrated by the motor controller, without affecting the layout space of the vehicle and reducing costs. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A schematic diagram of the structure of an electromagnetic clutch provided in an embodiment of the present invention;

[0036] Figure 2 A flowchart illustrating a control method for an electromagnetic clutch according to an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of a clutch electromagnetic coil circuit according to an embodiment of the present invention;

[0038] Figure 4 A flowchart illustrating another control method for an electromagnetic clutch provided in an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of an electromagnetic clutch provided in an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the connection relationship of a motor controller provided in an embodiment of the present invention. Detailed Implementation

[0041] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0043] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0044] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0045] This invention provides an electromagnetic clutch. Figure 1 A schematic diagram of the structure of the electromagnetic clutch provided in an embodiment of the present invention is shown below. Figure 1 As shown, the electromagnetic clutch can be a jaw clutch, which includes a clutch gear 1, a jaw disc 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, pushing the push ring 4 to engage the jaw disc 2 and the clutch gear 1, thus switching from a series driving mode to a parallel driving mode. Conversely, when the controller stops outputting the control current, the push ring 4 retracts under the force of the spring, disengaging the jaw disc 2 and the clutch gear 1, thus switching back from a parallel driving mode to a series driving mode.

[0046] Based on the above-described electromagnetic clutch, one embodiment of the present invention provides a control method for an electromagnetic clutch. Figure 2 A flowchart of a control method for an electromagnetic clutch provided in an embodiment of the present invention is shown below. Figure 2 As shown, the method includes:

[0047] Step 102: The motor controller receives the clutch target mode signal sent by the vehicle controller.

[0048] Step 104: The motor controller responds to the clutch target mode signal by outputting a set control voltage to the clutch solenoid coil circuit to control the electromagnetic clutch.

[0049] In this embodiment of the 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 terminal circuit. When the electromagnetic coil control circuit receives a set control voltage, the transistor turns 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 turns off, and the electromagnetic coil of the electromagnetic clutch is de-energized.

[0050] Figure 3 This is a schematic diagram of a clutch electromagnetic coil circuit according to an embodiment of the present invention, as shown below. Figure 3 As shown, the clutch electromagnetic coil circuit includes: MCU control terminal circuit, electromagnetic coil control circuit, voltage stabilization circuit, amplifier circuit, voltage comparison circuit and current sampling circuit.

[0051] In the MCU control 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 a four-input AND gate, and the four-input AND gate is connected to a two-input AND gate. 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. The MCU_PWM_ACU port is connected to the second resistor R2, and the second resistor R2 is connected to the first comparator... The "+" port of U1 is connected. The first resistor R1 is grounded and 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 connected to the fourth resistor R4, the second capacitor C2, and the "-" port of the first comparator U1. The fourth resistor R4 and the second capacitor C2 are connected in parallel and grounded. One end of the first comparator U1 is connected to the P5V_CAN port, with one end grounded, and the other end connected to a two-input AND gate. The two-input AND gate includes a fifth resistor R5 and an AND gate component Y1. The output of the first comparator U1 is connected to the fifth resistor R5 and the AND gate component Y1. The fifth resistor R5 is grounded and connected to the AND gate component Y1. The AND gate component Y1 is connected to a sixth resistor R6. The sixth resistor R6 is connected to a seventh resistor R7 and the first capacitor C1, which are connected in parallel. When the MCU control terminal voltage is less than the voltage of P3V3_DIG, the four-input AND gate outputs 0V, and transistor Q1 is turned off; when the MCU control terminal voltage is greater than or equal to the voltage of P3V3_DIG, the four-input AND gate outputs 5V, and the output capability is amplified through a two-input AND gate with lower power consumption, and transistor Q1 is turned on.

[0052] The electromagnetic coil control circuit includes: a Zener diode D1, a transistor Q1, and a transformer T1. The P18V_ACU port is connected to one end of both the Zener diode D1 and the transformer T1. The other two ends of the transformer T1 are connected to the VALVE_H2 and VALVE_L2 ports, respectively. The other end of the Zener diode D1 is connected to the drain of the transistor Q1 and one end of the transformer T1. One end of the first capacitor C1 is connected to the gate of the transistor Q1. The VALVE_H2 and VALVE_L2 ports are connected to the electromagnetic coil. The high-side (VALVE_H2 port) is normally supplied with 18V power and filtered by the transformer T1. When the transistor Q1 is turned on, the electromagnetic coil is energized, thus controlling the electromagnetic coil.

[0053] In this embodiment of the invention, when the P18V_ACU port of the electromagnetic coil control circuit receives the set control voltage, the transistor Q1 turns 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 turns off, and the electromagnetic coil of the electromagnetic clutch is de-energized.

[0054] The voltage stabilization circuit, amplification circuit, voltage comparison circuit, and current sampling circuit together form a diagnostic circuit. The voltage stabilization circuit outputs a fixed voltage and 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 connected to the tenth resistor R10, the fourth capacitor C4, and the "+" port of the second comparator U2. The tenth resistor R10 and the fourth capacitor C4 are connected in parallel and grounded. One end of the second comparator U2 is connected to the P3V3_VCCA port, and the other end is grounded. The "-" port of the second comparator U2 is connected to the fifth capacitor C5 and the eleventh resistor R11. The fifth capacitor C5 and the eleventh resistor R11 are connected in parallel.

[0055] The amplifier circuit includes: third capacitor C3, eighth resistor R8, sixth capacitor C6, twelfth resistor R12, thirteenth resistor R13, fourteenth resistor R14, fifteenth resistor R15, sixteenth resistor R16, eighteenth resistor R18, nineteenth resistor R19, third comparator U3, and seventh capacitor C7. The source of transistor Q1 is connected to the first capacitor C1, the thirteenth resistor R13, and the fourteenth resistor R14. 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. The eighteenth resistor R18 and the seventh capacitor C7 are connected in parallel. The eighteenth resistor R18 and the nineteenth resistor R19 are connected. 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. The twelfth resistor R12 and the sixth capacitor C6 are connected 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 of the second comparator U2. The third capacitor C3 is grounded.

[0056] The voltage comparison circuit includes: resistor R17 (seventeenth), resistor R20 (twentieth), capacitor C8 (eighth), comparator U4 (fourth), resistor R21 (twentieth), resistor R22 (twentieth), and capacitor C9 (ninth). Specifically, resistor R17 is connected to the P3V34_VCCA port, resistor R20, capacitor C8, and the "+" port of comparator U4. Resistor R20 and capacitor C8 are connected in parallel and grounded. One end of comparator U4 is connected to the P5V2_CAN port, and the other end is grounded. The "-" port of comparator U4 is connected to resistor R22 and capacitor C9. Resistor R22 is connected to the output of comparator U3, resistor R18, resistor R19, and capacitor C7. Capacitor C9 is grounded. The output of comparator U4 is connected to resistor R21 and the ACU_OC_N43 port. Resistor R21 is connected to the P3V23_DIG port. When the clutch solenoid coil is fault-free, the amplifier circuit outputs voltage to the negative input terminal of the voltage comparison circuit, which is compared 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, a 5V voltage is input to the ACU_OC_N43 port. In this embodiment of the invention, the motor controller integrates not only the function of output control current but also the diagnostic and protection control function of the electromagnetic clutch. In addition to diagnosing conventional communication message loss, high power supply voltage, and low power supply voltage, it also diagnoses electromagnetic clutch short circuits, electromagnetic clutch high-side short circuit to ground, and electromagnetic clutch low-side short circuit to power supply. If a short circuit exists in the electromagnetic coil control circuit, the negative input terminal of the voltage comparison circuit is greater than the positive input terminal, and a 0V voltage is input to the ACU_OC_N43 port. The motor controller reports a fault signal to the MCU and can simultaneously ignore the clutch target mode signal issued by the vehicle controller, stop outputting current, and feed back the clutch engagement signal until the next electromagnetic clutch engagement resumes the process.

[0057] The current feedback circuit includes: a 23rd resistor R23, a 10th capacitor C10, and an 11th capacitor C11. The 23rd resistor R23 is connected to the 19th resistor R19, the 18th resistor R18, the 7th capacitor C7, the 22nd resistor R22, the 10th capacitor C10, the 11th capacitor C11, and the IACU_ADC9 port. The 10th capacitor C10 and the 11th capacitor C11 are connected in parallel and grounded. The current feedback circuit collects current values ​​to control and adjust the MCU_PWM_ACU port. If the electromagnetic coil control circuit is open, the current feedback circuit will collect 0 current, which is inconsistent with the output of the MCU_PWM_ACU port, and the motor controller will report a fault signal to the MCU. The clutch electromagnetic coil circuit provided in this embodiment of the invention can control the electromagnetic coil current in the electromagnetic clutch control method. When no current flows through the electromagnetic coil, the push ring is not subjected to electromagnetic force and is only held in its initial position by spring force, and the clutch is in the open state. When current flows through the electromagnetic coil, the push ring is subjected to electromagnetic force, and the electromagnetic force is greater than the spring force, causing the push ring to move forward and the clutch to close. Compared to existing split-type technologies, integrating the control method of the electromagnetic clutch into the motor controller simplifies the software logic, shares some hardware chips, and reduces costs.

[0058] The technical solution provided in this invention includes a method comprising: a motor controller receiving a clutch target mode signal sent by a vehicle controller; the motor controller outputting 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 terminal circuit, wherein 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, thereby realizing the integrated control function of the electromagnetic clutch in the motor controller without affecting the layout space of the vehicle and reducing costs.

[0059] One embodiment of the present invention provides another control method for an electromagnetic clutch. Figure 4 A flowchart of another control method for an electromagnetic clutch provided in an embodiment of the present invention is shown below. Figure 4 As shown, the method includes:

[0060] Step 202: The vehicle controller determines the vehicle's driving mode. 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.

[0061] Step 204: The motor controller receives the clutch engagement signal sent by the vehicle controller. When the vehicle speed is greater than the first set threshold, the throttle opening is less than the second set threshold, the battery charge 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.

[0062] In this embodiment of the invention, a first set threshold, a second set threshold, and a 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%.

[0063] Step 206: In response to the closed clutch signal, the motor controller controls the electromagnetic coil control circuit to receive the first control voltage, the transistor turns on, outputs the first set current to the electromagnetic clutch, and the electromagnetic coil is energized to push the push ring, so that the jaw disc engages with the clutch gear.

[0064] In this embodiment of the invention, the structural schematic diagram of the clutch electromagnetic coil circuit is as follows: Figure 3 As shown, it will not be elaborated further here.

[0065] In this embodiment of the invention, the first control voltage and the first set current can be set according to the actual situation. For example, the first control voltage is 18V and the first set current is 3.8A (±0.1A).

[0066] In this embodiment of the invention, the motor controller responds to the closed clutch signal by controlling the P18V_ACU port of the electromagnetic coil control circuit to receive a first control voltage, the transistor Q1 turns on to output a first set current to the electromagnetic clutch, the electromagnetic coil is energized to push the push ring, so that the jaw disc engages with the clutch gear, and the closed clutch signal is fed back.

[0067] Step 208: When the vehicle controller determines that the vehicle has entered the parallel driving mode, the motor controller receives the holding clutch signal sent by the vehicle controller.

[0068] In this embodiment of the invention, when the vehicle speed, battery charge, and throttle opening meet the requirements, to satisfy the driver's driving needs, the vehicle controller sends a clutch holding signal and controls the speed of the front and rear clutch motors, ensuring that the speed difference between the front and rear clutch motors is less than a certain range, facilitating clutch engagement. To prevent the electromagnetic clutch coil from overheating due to prolonged high current output by the motor controller, the motor controller integrates an overheat protection control function for the electromagnetic clutch. If the speed difference between the front and rear clutch motors is not successfully adjusted to less than a certain range, the vehicle controller sends a clutch engagement signal for more than 5 seconds, the motor controller stops outputting current, reports a clutch engagement signal timeout, and jumps to a clutch disengagement signal after 5 signal cycles. Simultaneously, the vehicle controller needs to jump back to the clutch disengagement signal, and the motor controller will not respond to the clutch disengagement signal until the vehicle controller issues the clutch disengagement signal.

[0069] Step 210: In response to the clutch signal, the motor controller controls the electromagnetic coil control circuit to receive the second control voltage, the transistor turns on, outputs the second set current to the electromagnetic clutch, and the electromagnetic coil is energized to maintain the electromagnetic force required for the engagement of the jaw clutch and the clutch gear.

[0070] In this embodiment of the invention, a second control voltage and a 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).

[0071] In this embodiment of the invention, the motor controller receives a second control voltage at the P18V_ACU port of the holding clutch control circuit in response to the clutch signal. 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 engagement of the jaw clutch and the clutch gear, and the holding clutch signal is fed back.

[0072] In this embodiment of the invention, after executing step 210, the process can return to executing step 202.

[0073] Step 212: The motor controller receives the clutch engagement signal sent by the vehicle controller. When the vehicle speed is less than the fourth set threshold, the vehicle controller determines that the vehicle needs to switch from parallel driving mode to series driving mode.

[0074] In this embodiment of the invention, a fourth set threshold can be set according to the actual situation. For example, the fourth set threshold can be 65 km / h.

[0075] Step 214: In response to the clutch engagement signal, the motor controller controls the electromagnetic coil control circuit to stop receiving voltage, the transistor turns off, and the current output to the electromagnetic clutch stops. The electromagnetic coil stops being energized, the push ring rebounds under the force of the spring, and the jaw disc disengages from the clutch gear.

[0076] In this embodiment of the invention, the motor controller responds to the clutch engagement signal by controlling the P18V_ACU port of the electromagnetic coil control circuit to stop receiving voltage, the transistor Q1 is turned off, the current output to the electromagnetic clutch is stopped, the electromagnetic coil is de-energized, the push ring rebounds under the force of the spring, the jaw disc disengages from the clutch gear, and the clutch engagement signal is fed back.

[0077] In this embodiment of the invention, after executing step 214, the process can return to executing step 202.

[0078] The technical solution provided in this invention includes a method comprising: a motor controller receiving a clutch target mode signal sent by a vehicle controller; the motor controller outputting 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 terminal circuit, wherein 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, thereby realizing the integrated control function of the electromagnetic clutch in the motor controller without affecting the layout space of the vehicle and reducing costs.

[0079] The technical solution provided by the embodiments of the present invention is simple and reliable, and provides a new technical route for integrating electromagnetic clutch control function into hybrid power transmissions.

[0080] The technical solution provided by this invention integrates the control function of the electromagnetic clutch into the motor controller, eliminating the need to develop a separate electromagnetic clutch controller, reducing component costs and material management costs, and saving layout space.

[0081] The technical solution provided by this invention integrates the control function of the electromagnetic clutch into the motor controller, reducing repetitive work in software development, diagnostic development, CAN bus development, and functional testing, thereby improving development efficiency and reducing development costs.

[0082] The technical solution provided by the embodiments of the present invention enables the control function of the electromagnetic clutch to be arranged in the motor controller with water cooling, which effectively prevents the control circuit from overheating and reduces the probability of failure.

[0083] This invention provides an electromagnetic clutch. Figure 5 This is a schematic diagram of an electromagnetic clutch provided in an embodiment of the present invention, as shown below. Figure 5As shown, the electromagnetic clutch 20 includes the aforementioned 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 terminal circuit. When the electromagnetic coil control circuit receives a set control voltage, the transistor turns on, and the electromagnetic coil of the electromagnetic clutch is energized; or, when the electromagnetic coil control circuit does not receive a set control voltage, the transistor turns off, and the electromagnetic coil of the electromagnetic clutch is de-energized.

[0084] In this embodiment of the invention, the clutch electromagnetic coil circuit further includes an MCU control terminal circuit, which includes a four-input AND gate and a two-input AND gate. When the MCU control terminal voltage is greater than or equal to a set voltage threshold, the four-input AND gate outputs a first voltage, which is amplified by the two-input AND gate to turn on the transistor; or, when the MCU control terminal voltage is less than the set voltage threshold, the four-input AND gate does not output voltage and turns off the transistor.

[0085] In this embodiment of the invention, the clutch electromagnetic coil circuit 30 is as follows: Figure 3 As shown, it will not be elaborated further here.

[0086] This invention provides a motor controller applied to the control method of the electromagnetic clutch described above. Figure 6 This is a schematic diagram of the connection relationship of a motor controller provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the motor controller 10 is communicatively connected to the vehicle controller 40. The motor controller 10 integrates an electromagnetic clutch 20, which includes a clutch electromagnetic coil circuit 30.

[0087] 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 within the scope of protection of the present invention.

Claims

1. A control method of an electromagnetic clutch, characterized by, The motor controller receives a 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; The clutch electromagnetic coil circuit comprises an electromagnetic coil control circuit; When the electromagnetic coil control circuit receives the set control voltage, the triode is opened, and the 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; The clutch target mode signal comprises a closed clutch signal, before the motor controller receives the clutch target mode signal sent by the vehicle controller, comprising: The vehicle controller determines the driving mode of the vehicle, and when the vehicle controller determines that the vehicle needs to switch from series driving mode to parallel driving mode, the motor controller receives the closed clutch signal sent by the vehicle controller; When the vehicle speed is greater than the first set threshold, the accelerator opening is less than the second set threshold, the battery power is less than the third set threshold, and the clutch does not fail, the vehicle controller determines that the vehicle needs to switch from series driving mode to parallel driving mode; The clutch target mode signal comprises a keep clutch signal, before the motor controller receives the clutch target mode signal sent by the vehicle controller, comprising: The vehicle controller determines the driving mode of the vehicle, and when the vehicle controller determines that the vehicle enters parallel driving mode, the motor controller receives the keep clutch signal sent by the vehicle controller; The clutch target mode signal comprises an open clutch signal, before the motor controller receives the clutch target mode signal sent by the vehicle controller, comprising: The vehicle controller determines the driving mode of the vehicle, and when the vehicle controller determines that the vehicle needs to switch from parallel driving mode to series driving mode, the motor controller receives the open clutch signal sent by the vehicle controller; When the vehicle speed is less than the fourth set threshold, the vehicle controller determines that the vehicle needs to switch from parallel driving mode to series driving mode. The electromagnetic clutch comprises an electromagnetic coil, a push ring, a cog disc 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, comprising:

2. The method of claim 1, wherein, The motor controller controls the electromagnetic coil control circuit to receive a first control voltage in response to the closed clutch signal, the triode is opened, a first set current is output to the electromagnetic clutch, the electromagnetic coil is powered on to push the push ring, so that the cog disc and the clutch gear are combined. ​ 3. The method of claim 1, wherein, The electromagnetic clutch comprises an electromagnetic coil, a push ring, a cog disc 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, comprising: The motor controller controls the electromagnetic coil control circuit to receive a second control voltage in response to the keep clutch signal, the triode is opened, a second set current is output to the electromagnetic clutch, the electromagnetic coil is energized to maintain the electromagnetic force required for the cog disc to combine with the clutch gear.

4. The method of claim 1, wherein, The electromagnetic clutch comprises an electromagnetic coil, a push ring, a cog disc 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, comprising: The motor controller controls the electromagnetic coil control circuit to stop receiving voltage in response to the open clutch signal, the triode is closed, the current output to the electromagnetic clutch is stopped, the electromagnetic coil is de-energized, the push ring rebounds under the action of the spring force, and the cog disc is disengaged from the clutch gear.

5. An electromagnetic clutch, characterized by The control method applied to the electromagnetic clutch of any one of claims 1-4, comprising a clutch electromagnetic coil circuit; The clutch electromagnetic coil circuit comprises an electromagnetic coil control circuit; The electromagnetic coil control circuit comprises a triode connected to the MCU control end circuit, when the electromagnetic coil control circuit receives a set control voltage, the triode is opened, and the electromagnetic coil of the electromagnetic clutch is energized; or, When the electromagnetic coil control circuit does not receive a set control voltage, the triode is closed, and the electromagnetic coil of the electromagnetic clutch is de-energized.

6. The electromagnetic clutch of claim 5, wherein, The clutch electromagnetic coil circuit further comprises an MCU control end circuit; The MCU control end circuit comprises a four-input AND gate and a two-input AND gate, when the MCU control end voltage is greater than or equal to a set voltage threshold, the four-input AND gate outputs a first voltage, and the output is amplified through the two-input AND gate to open the triode; or, When the MCU control end voltage is less than the set voltage threshold, the four-input AND gate does not output voltage, and the triode is closed.

7. An electric machine controller characterized by The control method applied to the electromagnetic clutch of any one of claims 1-4, comprising: The motor controller is in communication connection with the vehicle control unit, the electromagnetic clutch is integrated in the motor controller, and the electromagnetic clutch comprises a clutch electromagnetic coil circuit.

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