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CN-224203587-U - High-efficient accurate control system of new forms of energy commercial card car based on DSP redundancy

CN224203587UCN 224203587 UCN224203587 UCN 224203587UCN-224203587-U

Abstract

The utility model discloses a high-efficiency and accurate control system of a new energy commercial truck based on DSP redundancy. In the utility model, the dual-core DSP is adopted to improve the system performance. One core is used for processing wave generation, voltage and current temperature sampling work, running control algorithm and communication function, and the other core is used for detecting and protecting, fault processing, self-learning algorithm and fault pre-judging algorithm. Meanwhile, the CAL coprocessor is utilized to share signal calculation processing tasks, CPU load is obviously reduced, overall operation efficiency of the system is improved, two groups of power supply modules are backed up mutually, when one group of power supply fails, the other group of power supply modules can be quickly switched to ensure stable power supply of the system, system shutdown caused by power failure is effectively avoided, accurate detection of three-phase current is realized through a hardware addition circuit, three groups of data are displayed simultaneously, and the three groups of data are checked mutually, so that data misjudgment caused by single acquisition point failure is prevented, and reliable data support is provided for accurate control of the system.

Inventors

  • GAO RENXIANG

Assignees

  • 深圳硅山技术有限公司

Dates

Publication Date
20260505
Application Date
20250506

Claims (10)

  1. 1. High-efficient accurate control system of new forms of energy commercial card car based on DSP redundancy, its characterized in that includes: the dual-core DSP main circuit is used for executing a motor drive control algorithm and fault detection protection and comprises a core 1 and a core 2; the redundant power supply circuit module provides stable power supply for the system through a two-way power supply switching mechanism; The multipoint sampling and checking circuit is used for collecting the IGBT bus voltage, three-phase current and temperature data and carrying out hardware-level redundancy check; the black box storage circuit is independent of the main control circuit and is used for circularly storing key data before and after faults; The independent safety chip monitoring module is used for directly controlling the PWM wave sealing and the relay to be turned off based on the vehicle-level safety chip; The dual-core DSP main circuit, the redundant power supply circuit, the multipoint sampling and checking circuit, the black box storage circuit and the independent security chip monitor are subjected to data interaction breaking through the CAN bus, the SPI interface and the shared memory.
  2. 2. The high-efficiency and accurate control system of the new energy commercial truck based on DSP redundancy as set forth in claim 1, wherein the dual-core DSP main circuit is internally provided with: The core 1 is connected with an IGBT driving circuit through an SPI interface and is responsible for generating PWM signals, executing a FOC algorithm and collecting voltage, current and temperature data in real time; The core 2 monitors and communicates with an independent safety chip through a CAN bus, monitors fault signals in real time and executes a protection algorithm; And the core 1 and the core 2 synchronize state data through a shared memory, and control rights are switched seamlessly during faults.
  3. 3. The high-efficiency and accurate control system of the new energy commercial truck based on DSP redundancy of claim 1, wherein the redundant power supply circuit adopts a double-circuit power supply design of an LM2596S chip, and monitors input voltage in real time through a voltage comparator; when the main power supply is abnormal, switching to the backup power supply through the MOSFET switch, wherein the switching time is less than 1ms; the output power supply is connected to the dual-core DSP main circuit and the peripheral circuit through the multistage filter circuit.
  4. 4. The high-efficiency and accurate control system of the new energy commercial truck based on DSP redundancy as claimed in claim 1, wherein the multi-point sampling and checking circuit is used for collecting three-phase current signals through the isolation operational amplifier circuit and is connected with the hardware addition circuit for redundancy check; the temperature data are collected through a thermistor voltage dividing circuit and are arranged on the DSP chip, the IGBT module and the power supply module in a redundant mode; The acquired data is converted by the ADC and then transmitted to the dual-core DSP main circuit through the SPI interface.
  5. 5. The high-efficiency and accurate control system of the new energy commercial truck based on DSP redundancy of claim 1, wherein the black box storage circuit adopts a W25Q128 SPI Flash and AT24C256 EEPROM chip, and is isolated from a main circuit through an independent SPI/I2C interface; The storage module in the black box storage circuit is independently powered, the physical distance between the storage module and the main control board is more than 10cm, and the voltage, current and temperature data before and after the fault are circularly stored for 10 seconds.
  6. 6. The high-efficiency and accurate control system of the new energy commercial truck based on DSP redundancy of claim 1, wherein the independent safety chip monitoring module directly collects bus voltage, IGBT temperature and current signals through independent ADC channels based on an N32A455 vehicle-standard MCU; when overcurrent or overtemperature is detected, the PWM output and the relay are directly turned off through the GPIO interface, and the response time is less than 1ms; The Controller Area Network (CAN) bus is communicated with the core 2, the priority is higher than that of the main control DSP, and an emergency braking signal is triggered to a vehicle braking system.
  7. 7. The high-efficiency and accurate control system of the new energy commercial truck based on DSP redundancy as claimed in claim 1, wherein the switching logic of the redundant power supply circuit comprises intelligent load distribution, and when the temperature of the main power supply exceeds a threshold value, the backup power supply is automatically started to share the load, and a power supply state alarm is sent to the dual-core DSP main circuit through the CAN bus.
  8. 8. The high-efficiency and accurate control system of the new energy commercial truck based on DSP redundancy as claimed in claim 1, wherein the black box storage circuit integrates an AES-128 encryption algorithm, and encrypted data is remotely transmitted to a cloud platform through a wireless communication module for fault analysis.
  9. 9. The high-efficiency and accurate control system of the new energy commercial truck based on DSP redundancy, which is characterized in that the independent safety chip monitors the built-in self-diagnosis function, periodically detects the states of an ADC, a comparator and a communication interface in the chip, and takes over the protection function through the redundancy safety chip when in failure; The independent safety chip monitors and links with the steering system of the vehicle, and when the motor fault causes abnormal torque, the speed limiting instruction is sent to the steering controller through the CAN bus to prevent the vehicle from being out of control.
  10. 10. The high-efficiency and accurate control system of the new energy commercial truck based on DSP redundancy of claim 1, wherein the hardware adding circuit of the multipoint sampling and checking circuit adopts three groups of redundancy design, eliminates abnormal data and triggers a redundant acquisition channel to resample by cross comparison of three-phase current values.

Description

High-efficient accurate control system of new forms of energy commercial card car based on DSP redundancy Technical Field The utility model belongs to the technical field of new energy truck control, and particularly relates to a high-efficiency and accurate control system for a new energy commercial truck based on DSP redundancy. Background On new energy automobiles, the motor drive controller plays roles of running the motor and protecting the motor. With the increasing complexity of current new energy commercial truck operating environments, motor drive control systems face unprecedented challenges. With the improvement of the intelligent degree of the vehicle, more auxiliary functions such as automatic driving assistance, internet of vehicles communication and the like generate data interaction with the motor driving system, and the processing burden of the traditional single DSP control system is further increased. Meanwhile, stringent regulations require that vehicles run safely under various extreme working conditions, and the stability and reliability of the traditional scheme are severely tested when the traditional scheme is used for dealing with severe environments such as low temperature, high humidity, strong electromagnetic interference and the like. For example, in a high-temperature environment, the heat dissipation problem of a single DSP chip is aggravated, which easily causes performance degradation and even a crash phenomenon, and seriously affects the normal running of the vehicle. In addition, the existing scheme depends on simple threshold judgment in fault diagnosis, and intermittent faults or hidden faults are difficult to accurately capture, so that the difficulty of vehicle maintenance is increased, and hidden hazards are buried for driving safety. In a motor drive control system of a new energy commercial truck, with continuous improvement of vehicle performance and strict requirements on safety. However, it has been difficult for conventional single DSP control systems to meet the high reliability requirements under complex operating conditions. On one hand, when a single DSP processes complex functions such as wave generation, sampling, control algorithm, communication and the like, performance bottlenecks caused by overhigh load are easy to occur, and on the other hand, the reliability of a power supply module is insufficient and a fault detection and protection mechanism is not perfect enough, so that when the system faces sudden faults, the system cannot timely and effectively cope with the sudden faults, secondary faults are possibly caused, and serious safety accidents are caused. In addition, the fault data recording and analyzing method has defects, and is not beneficial to the development of subsequent research and development and optimization upgrading work. Disclosure of Invention The utility model aims to solve the problems and provide a high-efficiency and accurate control system for a new energy commercial truck based on DSP redundancy. The technical scheme adopted by the utility model is as follows, a novel energy commercial truck high-efficiency and accurate control system based on DSP redundancy comprises: the dual-core DSP main circuit is used for executing a motor drive control algorithm and fault detection protection and comprises a core 1 and a core 2; the redundant power supply circuit module provides stable power supply for the system through a two-way power supply switching mechanism; The multipoint sampling and checking circuit is used for collecting the IGBT bus voltage, three-phase current and temperature data and carrying out hardware-level redundancy check; the black box storage circuit is independent of the main control circuit and is used for circularly storing key data before and after faults; The independent safety chip monitoring module is used for directly controlling the PWM wave sealing and the relay to be turned off based on the vehicle-level safety chip; The dual-core DSP main circuit, the redundant power supply circuit, the multipoint sampling and checking circuit, the black box storage circuit and the independent security chip monitor are subjected to data interaction breaking through the CAN bus, the SPI interface and the shared memory. In a preferred embodiment, the dual-core DSP main circuit is internally provided with: The core 1 is connected with an IGBT driving circuit through an SPI interface and is responsible for generating PWM signals, executing a FOC algorithm and collecting voltage, current and temperature data in real time; The core 2 monitors and communicates with an independent safety chip through a CAN bus, monitors fault signals in real time and executes a protection algorithm; And the core 1 and the core 2 synchronize state data through a shared memory, and control rights are switched seamlessly during faults. In a preferred embodiment, the redundant power supply circuit adopts a dual-path power supply design of an LM259