Title:
DYNAMIC BRAKING CIRCUIT FOR ELECTRIC MOTOR, AND DYNAMIC BRAKING METHOD FOR ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2021/098311
Kind Code:
A1
Abstract:
Disclosed are a dynamic braking circuit for an electric motor, and a dynamic braking method for an electric motor. After being rectified by a rectifier bridge module, an alternating current is converted, after being subjected to the filtering of a bus capacitor, into a direct current bus P/N with a stable voltage, and a direct current is then converted, by means of an inverter bridge module, into an alternating current to drive an electric motor; one end of a power-on soft start module is connected to the positive side P of the bus, and the other end thereof is connected to one end of a bus capacitor module and one end of a regenerative braking module, and the other end of the bus capacitor module and the other end of the regenerative braking module are connected to the negative side N of the bus; and a dynamic braking module is directly connected to the direct current bus P/N. The dynamic braking circuit of the present invention completely multiplexes body diodes of the inverter bridge module to realize rectification, without the need to add three additional diodes per shaft, such that system costs are reduced, and the PCB area is reduced; and multi-axis common bus systems sharing a dynamic braking module can be supported without the need to add any additional wiring, such that the system wiring is simplified, and the costs of the wiring terminals and cables are reduced.
Inventors:
YAO ZHEN (CN)
DU XIN (CN)
QIAN WEI (CN)
DU XIN (CN)
QIAN WEI (CN)
Application Number:
PCT/CN2020/110296
Publication Date:
May 27, 2021
Filing Date:
August 20, 2020
Export Citation:
Assignee:
ESTUN AUTOMATION CO LTD (CN)
International Classes:
H02P3/22; H02H9/04
Foreign References:
| CN110838806A | 2020-02-25 | |||
| CN1305213C | 2007-03-14 | |||
| CN103391042A | 2013-11-13 | |||
| CN107994781A | 2018-05-04 | |||
| JP2005112598A | 2005-04-28 |
Attorney, Agent or Firm:
NANJING RUIZHIBO INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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