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A fault protection device and method for motor control system based on cpld and dsp

A technology for system failure and motor control, applied in emergency protection circuit devices, emergency protection data processing devices, circuit devices, etc., to achieve the effect of increasing stability and reliability

Active Publication Date: 2019-07-16
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Application Information

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Problems solved by technology

The device and its method solve the problem of how to improve the reliability of the fault protection processing of the motor control system

Method used

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  • A fault protection device and method for motor control system based on cpld and dsp
  • A fault protection device and method for motor control system based on cpld and dsp
  • A fault protection device and method for motor control system based on cpld and dsp

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Embodiment Construction

[0024] The following are specific embodiments of the present invention, and further describe the technical solution of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0025] like Figure 1-2 As shown, this motor control system fault protection device based on CPLD and DSP includes data acquisition module 9, power module 4, CPLD module 2 and DSP module 1, CPLD module 2 and DSP module 1 are connected by data lines, and the device also includes data lines The level conversion module 3 bidirectionally connected to the CPLD module 2, the data acquisition module 9 is electrically connected to the level conversion module 3, the data line of the power module 4 is bidirectionally connected to the level conversion module 3, and the power module sends a fault signal to the level conversion module. The conversion module 3 sends a PWM pulse signal to the power module according to the control instruction o...

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Abstract

The invention provides a fault protection device and method for a motor control system based on a CPLD and a DSP, and belongs to the technical field of automobiles. The device and method solve a problem of how to inmprove the reliability of the fault protection of the motor control system. The device comprises a data acquisition module, a power module, a CPLD module, a DSP module and a level conversion module connected to the CPLD module. The data acquisition module is electrically connected to the level conversion module. A power module data line is bidirectionally connected to the level conversion module. The data acquisition module is further electrically connected to the DSP module. The method includes: when a fault signal value is greater than a hardware threshold, the CPLD module blocks a hardware PWM pulse, and triggers the DSP module to activate a fault protection interrupt. The DSP module receives a detection signal value and compares the same with a software threshold 1 and asoftware threshold 2 respectively, reduces the power when the detection signal value is greater than the software threshold 1 but less than the software threshold 2, and blocks the PWM pulse by software when the detection signal value is greater than the software threshold 2. The device and method enhance the fault protection stably and reliably.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and relates to a fault protection device and method for a motor control system based on CPLD and DSP. Background technique [0002] New energy vehicles are currently developing rapidly, and the motor control system is a key component in new energy vehicles. Due to the complex operation of the motor control system and high safety and reliability requirements in vehicle operation, improving the fault handling and protection functions of the electronic control system is of great significance to the safety of new energy vehicles. In the prior art, methods for fault protection of the motor control system mainly include software protection, logic gate protection and CPLD module protection. [0003] Chinese patent literature discloses a CPLD module-based electric vehicle motor system fault processing device with application number 201020638915. Including CPLD module, DSP module, motor temperature ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/08H02H1/00
CPCH02H1/0092H02H7/0822H02H7/0833
Inventor 施邹云
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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