An integrated electric drive axle control system

Abstract

The utility model relates to an integrated electric drive axle control system, including drive motor control system, gear shifting motor control system, oil pump motor control system and on -vehicle diagnostic system, drive motor control system, gear shifting motor control system, oil pump motor control system and on -vehicle diagnostic system are integrated on one main control board, and share same connector, share a power supply, the utility model not only sets up on the same main control board from the arrangement space, and each system same connector, share a power supply, reduced system power consumption, greatly reduced system complexity, improved communication rate and control efficiency, reduced cost and maintenance difficulty.

Description

Technical Field

[0001] This utility model relates to the field of controller technology, and in particular to an integrated electric drive bridge control system. Background Technology

[0002] With the rapid development of electric vehicle technology, the requirements for the integration, intelligence, and reliability of vehicle control systems are increasing. Traditional electric drive axle control systems are generally located in control units close to mechanical components. This arrangement is suitable for products with only one control system, but a single control system can no longer meet the needs of intelligent development. Currently, electric drive axle products generally contain multiple control systems, such as motor control systems and shift control systems. This independent and decentralized arrangement not only increases the complexity of the entire electric axle control system but also easily leads to malfunctions in the coordination between control units, increasing production and braking costs and maintenance difficulty. Therefore, developing a highly integrated hardware control system capable of simultaneously realizing the above-mentioned multiple functions is of great significance for improving electric drive axle performance, reducing costs, and simplifying maintenance. Utility Model Content

[0003] The purpose of this invention is to provide an integrated electric drive bridge control system to address the shortcomings of existing technologies.

[0004] This utility model is achieved using the following technical solution:

[0005] An integrated electric drive axle control system includes a drive motor control system, a shift motor control system, an oil pump motor control system, and an on-board diagnostic system.

[0006] The drive motor control system, the shift motor control system, the oil pump motor control system, and the on-board diagnostic system are integrated on a single main control board and share the same connector and power supply.

[0007] Furthermore, the drive motor control system includes an MCU signal sampling unit, an MCU fault protection unit, an MCU resolver decoding unit, an MCU drive control unit, and an MCU communication unit.

[0008] Furthermore, the shift motor control system includes a TCU signal sampling unit, a TCU fault protection unit, a TCU electric shift control unit, a TCU pneumatic shift control unit, and a TCU communication unit.

[0009] Furthermore, the oil pump motor control system includes an OPCU signal sampling unit, an OPCU drive control unit, an OPCU fault protection unit, and an OPCU communication unit.

[0010] Furthermore, the on-board diagnostic system includes an axle shoe temperature monitoring module, an axle vibration monitoring module, an axle oil temperature monitoring module, and a brake shoe wear monitoring module.

[0011] Furthermore, the main control board adopts a DSP main control unit, and the DSP main control unit adopts a core-level central processing unit.

[0012] Furthermore, the power supply adopts a two-stage power supply, including a primary power supply and a secondary power supply; the primary power supply adopts a flyback power supply, and the secondary power supply adopts a PMIC chip for power supply.

[0013] Furthermore, it also includes an EEPROM storage unit; the EEPROM storage unit is integrated on the DSP main control unit.

[0014] Furthermore, the OPCU drive control unit and the OPCU fault protection unit are integrated and packaged in a single chip.

[0015] Furthermore, the MCU communication unit, the TCU communication unit, and the OPCU communication unit all have a MOS transistor on the terminating resistor.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] The highly integrated control system provided by this utility model has multiple control systems centrally arranged on a main control board, which greatly saves layout space, reduces product weight and cost. At the same time, the highly integrated control system uses a DSP main control unit for overall control, realizing motor control, shift control, oil pump control and fault diagnosis functions of the electric drive bridge. This facilitates orderly coordination and processing of signals between modules, reduces the complexity of the control system, improves system control performance, and reduces product failure risk and after-sales maintenance difficulty. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] In the diagram: 1. DSP main control unit; 2. EEPROM storage unit; 20. MCU resolver decoding unit; 21. MCU drive control unit; 22. MCU signal sampling unit; 23. MCU fault protection unit; 24. MCU communication unit; 30. TCU communication unit; 31. TCU fault protection unit; 32. TCU signal sampling unit; 33. TCU electric shift control unit; 34. TCU pneumatic shift control unit; 40. OPCU drive control unit; 41. OPCU communication unit; 42. OPCU signal sampling unit; 50. On-board diagnostic circuit. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0021] like Figure 1 As shown: An integrated electric drive axle control system includes a drive motor control system, a shift motor control system, an oil pump motor control system, and an on-board diagnostic system.

[0022] The drive motor control system, shift motor control system, oil pump motor control system, and on-board diagnostic system are integrated on a single main control board, sharing the same connector and power supply.

[0023] The drive motor control system includes an MCU (microcontroller, commonly known as a single-chip microcomputer) signal sampling unit 22, an MCU fault protection unit 23, an MCU resolver decoding unit 20, an MCU drive control unit 21, and an MCU communication unit 24. The MCU signal sampling unit 22 primarily functions to acquire motor temperature, module temperature, three-phase current, bus voltage, and drive board fault information. The MCU fault protection unit 23 primarily functions to protect the drive motor from overvoltage, IGBT / SIC (two different power electronic devices) modules from overcurrent and overtemperature, and drive board faults. The MCU resolver decoding unit 20 is equipped with a programmable sine wave oscillator for analyzing drive motor speed information and has system fault diagnosis capabilities, detecting faults such as resolver signal loss, out-of-range signal input, input signal mismatch, and position tracking loss. The MCU drive control unit 21 is used for drive motor wave generation control, adjusting the drive motor's speed and torque output. The MCU communication unit 24 is used for communication between different control systems.

[0024] The operating modes of the various units in the drive motor control system are as follows: The MCU signal sampling unit 22 receives information from sensors and the drive board, and feeds it back to the DSP main control unit 1. The DSP main control unit 1 reacts and controls the MCU drive control unit 21 to execute corresponding actions; or the MCU signal sampling unit 22 feeds the signal back to the MCU fault protection unit 23, which further analyzes overcurrent, overvoltage, and overtemperature, and feeds the results back to the DSP main control unit 1. The DSP main control unit 1 controls the MCU drive control unit 21 to execute corresponding actions and inputs the fault information to the EEPROM storage unit 2 for storage. The MCU resolver decoding unit 20 receives signals from the resolver, decodes them, and feeds them back to the DSP main control unit 1. The DSP main control unit 1 reacts and sends drive signals through the MCU communication unit 24. The CAN transceiver unit receives the bus dominant / recessive level signals, decodes them into binary signals, and feeds them back to the DSP main control unit 1. The DSP main control unit 1 reacts according to the feedback signals; the DSP main control unit 1 transmits the binary signals to the CAN transceiver unit, which converts the input signals into dominant / recessive level signals and outputs them to the bus.

[0025] The shift motor control system includes a TCU (Transmission Control Unit) signal sampling unit 32, a TCU fault protection unit 31, a TCU electric shift control unit 33, a TCU pneumatic shift control unit 34, and a TCU communication unit 30. The TCU signal sampling unit 32 primarily collects information on the output shaft speed of the electric drive axle, the displacement of the shift motor, the temperature of the circuit board, and the drive current signal of the shift motor. The TCU fault protection unit 31 primarily provides overcurrent protection for the shift motor and overtemperature protection for the PCB (Printed Circuit Board). The TCU electric shift control unit 33 controls the wave generation for the shift motor drive. The TCU pneumatic shift control unit 34 drives the pneumatic shift solenoid valve. The TCU communication unit 30 is used for communication between different control systems.

[0026] The operating modes of the various units in the shift motor control system are as follows: The TCU signal sampling unit 32 receives external signals and feeds them back to the DSP main control unit 1 or the TCU fault protection unit 31. The DSP main control unit 1 then sends a signal to control the TCU electric shift control unit 33 or the TCU pneumatic shift control unit 34 to control the shifting; or it inputs fault information to the EEPROM storage unit 2 for storage, and the TCU fault protection unit 31 performs overcurrent and overtemperature protection actions. The TCU communication unit 30 receives the bus explicit and implicit level signals, decodes them into binary signals, and feeds them back to the DSP main control unit 1. The DSP main control unit 1 reacts according to the feedback signal; the DSP main control unit 1 transmits the binary signal to the TCU communication unit 30, and the TCU communication unit 30 converts the input signal into explicit and implicit level signals and outputs them to the bus.

[0027] The oil pump motor control system includes an OPCU signal sampling unit 42, an OPCU drive control unit 40, an OPCU fault protection unit, and an OPCU communication unit 41. The OPCU signal sampling unit 42 primarily collects oil pressure information, oil temperature information, and oil pump motor drive current signals from the electric drive bridge. The OPCU drive control unit 40 controls the oil pump motor drive signal generation. The OPCU fault protection unit primarily provides over-temperature and over-current protection for the oil pump motor. The OPCU communication unit 41 is used for communication between different control systems.

[0028] The operating mode of each unit in the oil pump motor control system is as follows: OPCU signal sampling unit 42 receives external signals and feeds them back to DSP main control unit 1. DSP main control unit 1 then sends a signal to control OPCU drive control unit 40 to control the oil pump. OPCU communication unit 41 receives the bus explicit / implicit level signal, decodes it into a binary signal, and feeds it back to DSP main control unit 1. DSP main control unit 1 reacts according to the feedback signal. DSP main control unit 1 transmits the binary signal to OPCU communication unit 41, and OPCU communication unit 41 converts the input signal into an explicit / implicit level signal and outputs it to the bus.

[0029] The on-board diagnostic system includes an axle shoe temperature monitoring module, an axle vibration monitoring module, an axle oil temperature monitoring module, and a brake shoe wear monitoring module. The on-board diagnostic circuit 50 monitors the status of various electronic components such as the on-board electronic ballast and on-board relays, and diagnoses and alarms when faults occur. The axle shoe temperature monitoring module primarily monitors the temperature and quality of the lubricating oil inside the axle. The axle vibration monitoring module primarily monitors the vibration of the bridge structure and analyzes the impact of vehicle dynamic characteristics on bridge vibration. The axle oil temperature monitoring module monitors the temperature and quality of the lubricating oil inside the axle in real time and controls the radiator to start operating and dissipate heat from the lubricating oil when the temperature is too high. The brake shoe wear monitoring module monitors the wear condition of the brake shoes in real time.

[0030] The main control board uses a DSP (referring to a microprocessor specifically designed for performing digital signal processing tasks) main control unit 1. The DSP main control unit 1 uses a 4-core 32-bit central processing unit (i.e., CPU) with a maximum clock frequency of 300MHz.

[0031] The power supply adopts a two-stage power supply, including a primary power supply and a secondary power supply; the primary power supply uses a flyback power supply with an output voltage of up to 30V; the secondary power supply uses a PMIC (Power Management Integrated Circuit) chip to meet the power needs of various systems.

[0032] It also includes an EEPROM (Electrically Erasable Programmable Read-Only Memory) storage unit 2; the EEPROM storage unit 2 is integrated on the DSP main control unit 1. The EEPROM storage unit 2 is mainly used to store fault information.

[0033] The OPCU drive control unit 40 and the OPCU fault protection unit are integrated and packaged in a single chip.

[0034] The MCU communication unit, TCU communication unit 30 and OPCU communication unit 41 all have MOS transistors on the terminating resistors. The MOS transistors (referring to a common electronic component) can be selectively turned on or off. By adjusting their on / off state, different resistance parameter requirements can be met.

[0035] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. An integrated electric drive bridge control system, characterized in that, This includes the drive motor control system, the shift motor control system, the oil pump motor control system, and the on-board diagnostic system; The drive motor control system, the shift motor control system, the oil pump motor control system, and the on-board diagnostic system are integrated on a single main control board and share the same connector and power supply.

2. The integrated electric drive bridge control system as described in claim 1, characterized in that, The drive motor control system includes an MCU signal sampling unit (22), an MCU fault protection unit (23), an MCU resolver decoding unit (20), an MCU drive control unit (21), and an MCU communication unit (24).

3. The integrated electric drive bridge control system as described in claim 2, characterized in that, The shift motor control system includes a TCU signal sampling unit (32), a TCU fault protection unit (31), a TCU electric shift control unit (33), a TCU pneumatic shift control unit (34), and a TCU communication unit (30).

4. The integrated electric drive bridge control system as described in claim 3, characterized in that, The oil pump motor control system includes an OPCU signal sampling unit (42), an OPCU drive control unit (40), an OPCU fault protection unit, and an OPCU communication unit (41).

5. The integrated electric drive bridge control system as described in claim 4, characterized in that, The on-board diagnostic system includes an axle shoe temperature monitoring module, an axle vibration monitoring module, an axle oil temperature monitoring module, and a brake shoe wear monitoring module.

6. The integrated electric drive bridge control system as described in claim 5, characterized in that, The main control board adopts a DSP main control unit (1), and the DSP main control unit (1) adopts a 4-core 32-bit central processing unit.

7. The integrated electric drive bridge control system as described in claim 6, characterized in that, The power supply adopts a two-stage power supply, including a primary power supply and a secondary power supply; the primary power supply adopts a flyback power supply, and the secondary power supply adopts a PMIC chip for power supply.

8. The integrated electric drive bridge control system as described in claim 6, characterized in that, It also includes an EEPROM storage unit (2); the EEPROM storage unit (2) is integrated on the DSP main control unit (1).

9. The integrated electric drive bridge control system as described in claim 4, characterized in that, The OPCU drive control unit (40) and the OPCU fault protection unit are integrated and packaged in a single chip.

10. The integrated electric drive bridge control system as described in claim 4, characterized in that, The MCU communication unit, the TCU communication unit (40), and the OPCU communication unit (41) all have a MOS transistor on the terminating resistor.

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