Title:
FAULT DETECTION METHOD FOR SERVO DYNAMIC BRAKE CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2020/124936
Kind Code:
A1
Abstract:
A fault diagnosis method for a servo dynamic brake circuit. In a dynamic brake loop of the servo dynamic brake circuit, a current transducer CT1 is mounted between a point P1 and a point U, and a current transducer CT2 is mounted between a point P2 and a point V. When a brake switch K is switched off, U-phase and V-phase currents are directly obtained by means of the current transducers CT1 and CT2, a W-phase current is calculated, and the three-phase current is compared with a set threshold current ith, so as to determine whether the brake loop has an open-circuit fault. According to the fault detection method, only the mounting position of a current transducer is adjusted on hardware, and additional hardware costs do not need to be increased. The method does not require a dedicated detection control signal, and automatically completes the detection of a dynamic brake circuit during a dynamic braking process of an electric motor, and has a good real-time performance.
Inventors:
YAO TIAN (CN)
YU GUOJUN (CN)
MIAO MAOYU (CN)
CHEN FU (CN)
ZHU HONGSHUN (CN)
QIAN WEI (CN)
YU GUOJUN (CN)
MIAO MAOYU (CN)
CHEN FU (CN)
ZHU HONGSHUN (CN)
QIAN WEI (CN)
Application Number:
PCT/CN2019/086548
Publication Date:
June 25, 2020
Filing Date:
May 13, 2019
Export Citation:
Assignee:
NANJING ESTUN AUTOMATION CO LTD (CN)
International Classes:
G01R31/34
Foreign References:
| CN203675030U | 2014-06-25 | |||
| CN101483402A | 2009-07-15 | |||
| CN106159905A | 2016-11-23 | |||
| CN105006731A | 2015-10-28 | |||
| JPH0833195A | 1996-02-02 |
Attorney, Agent or Firm:
NANJING RUIZHIBO INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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