Title:
CONTROLLER CIRCUIT OF ELECTRIC POWER STEERING SYSTEM, AND SAMPLING AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/068526
Kind Code:
A1
Abstract:
Disclosed are a controller circuit of an electric power steering system, and a sampling and control method therefor. The circuit comprises a three-phase electric motor, a micro-controller, a three-phase bridge module and a three-phase electric motor phase voltage state feedback circuit, wherein the three-phase electric motor phase voltage state feedback circuit comprises three pull-up circuits in addition to three voltage dividing circuits. The micro-controller is used for carrying out power-on fault diagnosis on a U-phase upper-bridge field effect transistor, a U-phase lower-bridge field effect transistor, a V-phase upper-bridge field effect transistor, a V-phase lower-bridge field effect transistor, a W-phase upper-bridge field effect transistor and a W-phase lower-bridge field effect transistor by means of controlling the turning on or off of the U-phase upper-bridge field effect transistor, the U-phase lower-bridge field effect transistor, the V-phase upper-bridge field effect transistor, the V-phase lower-bridge field effect transistor, the W-phase upper-bridge field effect transistor and/or the W-phase lower-bridge field effect transistor and on the basis of a voltage collected by an analog-to-digital conversion voltage collection end. By means of the control circuit, the accurate diagnosis of each field effect transistor in a three-phase bridge module is realized, thereby improving the diagnosis coverage rate for field effect transistors.
Inventors:
GONG DELIN (CN)
CHA YIWEI (CN)
WU XIAQING (CN)
JING CAIYUN (CN)
ZHANG TONGLEI (CN)
CHA YIWEI (CN)
WU XIAQING (CN)
JING CAIYUN (CN)
ZHANG TONGLEI (CN)
Application Number:
PCT/CN2020/093381
Publication Date:
April 15, 2021
Filing Date:
May 29, 2020
Export Citation:
Assignee:
BOSCH HUAYU STEERING SYSTEMS CO LTD (CN)
International Classes:
B62D5/04
Foreign References:
| CN101052372A | 2007-10-10 | |||
| CN104506091A | 2015-04-08 | |||
| CN107707159A | 2018-02-16 | |||
| US20160164447A1 | 2016-06-09 | |||
| JP2012218693A | 2012-11-12 | |||
| JP2008273391A | 2008-11-13 | |||
| CN201910963183A | 2019-10-11 |
Other References:
See also references of EP 4043318A4
Attorney, Agent or Firm:
SHANGHAI BESHINING LAW OFFICE (CN)
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