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A detection system and method for motor phase open circuit and short circuit used on eps

A detection system and detection method technology, applied in the EPS field, can solve problems such as misdiagnosis

Active Publication Date: 2021-05-04
HANGZHOU XIANGBIN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this strategy can achieve a certain detection effect, if the motor is rotating at this time, misdiagnosis may occur

Method used

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  • A detection system and method for motor phase open circuit and short circuit used on eps
  • A detection system and method for motor phase open circuit and short circuit used on eps
  • A detection system and method for motor phase open circuit and short circuit used on eps

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Embodiment Construction

[0032] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] The detection system of motor phase open circuit and short circuit used on a kind of EPS of the present invention, such as figure 1 As shown, when the software system enters the open circuit and short circuit detection, the diagnostic algorithm module will select one-phase output PWM, and the PWM output module will generate PWM waveforms according to the requirements, and turn on the MOSFETs of the corresponding phases; Collected and fed back to the diagnostic algorithm module; and the VDS acquisition module will also collect the VDS voltage of the MOSFET turned on by the PWM output module and feed it back to the diagnostic algorithm module; finally, the diagnostic algorithm module feeds back data according to the PWM acquisition module and the VDS acquisition module, Judging whether it exceeds the given range, if it exceeds, there is a ...

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Abstract

The present invention provides a detection system and method for motor phase open circuit and short circuit used on EPS, including a PWM output module, a PWM acquisition module, a VDS acquisition module and a diagnosis algorithm module; Two MOSFETs output PWM waveforms at the same time, and their waveforms are complementary; the PWM acquisition module collects the duty cycle signals on the three phases of the motor U, V, and W in real time and transmits it to the diagnostic algorithm module; the VDS acquisition module monitors the MOSFET through sensors The voltage between the drain and the source is transmitted to the diagnostic algorithm module; the diagnostic algorithm module diagnoses the open circuit and short circuit of the motor through the received duty cycle signal and VDS voltage. The invention has the advantages of rapid and accurate diagnosis, which can also be accurately diagnosed when the motor is rotating.

Description

technical field [0001] The invention relates to the technical field of EPS, in particular to a detection system and method for motor phase open circuit and short circuit used in EPS. Background technique [0002] Electric power steering technology has matured day by day, and has the tendency to replace hydraulic power steering, which is one of the development directions of power steering technology in the future. Electric power steering uses electric motors to provide power directly, and the power is controlled by the electronic control unit. It can not only save energy, improve safety, but also benefit environmental protection. It is a high-tech closely related to the development theme of modern automobiles. Therefore, the Electric Power Steering System (EPS) has become a research hotspot in domestic steering technology. [0003] Since the EPS uses the electric motor to provide power directly, if there is an open circuit or a short circuit in the motor, it will not only ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/54G01R31/52G01R31/34
CPCG01R31/343G01R31/52G01R31/54
Inventor 田雕锦景立群蔡斌
Owner HANGZHOU XIANGBIN ELECTRONICS TECH