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Motor controller function safety control method and system

A motor controller and functional safety technology, applied in the direction of power network operating system integration, emergency power supply arrangement, information technology support system, etc., can solve the problems of inapplicability and single protection performance

Pending Publication Date: 2021-10-26
DONGFENG MOTOR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Single passing current, power supply comparison realizes short-circuit protection through NAND gate, the above technology is suitable for three-phase short-circuit protection, but not suitable for power supply failure, and the protection performance is single

Method used

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  • Motor controller function safety control method and system
  • Motor controller function safety control method and system

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Embodiment Construction

[0048] The following specific implementation methods are used to explain the technical solutions of the claims of the present invention, so that those skilled in the art can understand the claims. The protection scope of the present invention is not limited to the following specific implementation structures. The protection scope of the present invention includes the technical solution of the claims of the present invention made by those skilled in the art and is different from the following specific embodiments.

[0049] Such as figure 1 As shown, the electric energy from the power battery is configured by the first power supply 101 as multiple power supply voltage outputs, and the multiple power supply outputs include but are not limited to each load unit used in this embodiment. In the embodiment, the multi-channel power supply output includes a low-voltage power supply VDD for the control unit 400 and the monitoring unit 500, etc., and the multi-channel power supply outpu...

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Abstract

The invention discloses a motor controller function safety control method and system. The system comprises a control unit and a monitoring unit and is used for monitoring whether software execution of the control unit is normal or not, outputting signals to an IO channel and implementing driving module selection switch action control, to enter a safe state; a selection switch is configured at the output of the driving module, and is used for selecting in a normal state or a failure state to ensure the safe operation of the system, selecting between a PWM signal and a default level state, and controlling by an IO channel; a logic unit signal is used for gate control of a selection switch of the driving module; and a standby high-voltage driving power supply module implements half-bridge driving after the power supply module fails. According to the invention, through selecting the default state of the switch, after the power supply module fails, the output of the driving module is cut off, and the standby high-voltage driving power supply module supplies power to the second driving module and the second bridge IBGT to automatically realize safety protection. The system is simple in architecture and easy to control.

Description

technical field [0001] The invention belongs to the vehicle control technology, in particular to the safety protection in the vehicle control process, especially the safety control technology for the IGBT controller. Background technique [0002] The motor controller uses the control instructions of the control unit to control the IGBT output to drive the motor to run. Usually the drive circuit includes the upper bridge drive and the lower bridge drive; the outputs of the upper bridge drive and the lower bridge drive are respectively for the IGBT. Such as figure 1 drive system shown. The power supply VBAT provides the control unit with low-voltage input VDD, and the upper and lower bridge drive control input power; the power supply VBAT provides VINT through the power supply 1, and the high-voltage power supply VDDH and power supply VDDL output by VINT through the power supply 2 and 3 respectively. The high-voltage power supply VDDH and the power supply VDDL are output to...

Claims

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Application Information

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IPC IPC(8): H02H7/08H02J9/06
CPCH02H7/0805H02H7/0822H02H7/0844H02H7/0838H02J9/062Y02B70/30Y04S20/20
Inventor 王志虎高云梁朔郭瑞松
Owner DONGFENG MOTOR GRP
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