Title:
ELECTRIC DRIVE SYSTEM, POWER ASSEMBLY AND ELECTRIC VEHICLE
Document Type and Number:
WIPO Patent Application WO/2022/083220
Kind Code:
A1
Abstract:
Provided are an electric drive system, a power assembly and an electric vehicle, which relate to the technical field of power electronics. The electric drive system is used for driving an electric motor, the electric motor comprising an excitation winding; and the electric drive system comprises: a bus, a three-level inverter circuit, an electric excitation circuit and a controller, wherein the bus comprises a positive bus and a negative bus; the three-level inverter circuit comprises a first bus capacitor and a second bus capacitor; the first bus capacitor is connected between the positive bus and the bus midpoint, and the second bus capacitor is connected between the negative bus and the bus midpoint; a first input end of the electric excitation circuit is connected in parallel to the first bus capacitor, a second input end of the electric excitation circuit is connected in parallel to the second bus capacitor, and an output end of the electric excitation circuit is connected to the excitation winding of the electric motor; and the controller is used for controlling the working state of the electric excitation circuit, so as to balance the potential of the bus midpoint. By using the electric drive system, the capability of adjusting the potential of a bus midpoint is improved.
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Inventors:
CHEN YUE (CN)
ZHANG XUELIANG (CN)
FENG NINGBO (CN)
ZHANG XUELIANG (CN)
FENG NINGBO (CN)
Application Number:
PCT/CN2021/110022
Publication Date:
April 28, 2022
Filing Date:
August 02, 2021
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
H02P27/08; B60L15/32; H02M3/335; H02M7/487
Foreign References:
| CN112436780A | 2021-03-02 | |||
| CN104167971A | 2014-11-26 | |||
| CN102255548A | 2011-11-23 | |||
| CN106451544A | 2017-02-22 | |||
| CN101588126A | 2009-11-25 | |||
| JP2009268189A | 2009-11-12 | |||
| CN202011133767A | 2020-10-21 |
Other References:
GUOJUN TAN, WU XUANQIN; LI HAO; JING WEI; LIU MENG: "Vector Control System of Electrically Excited Synchronous Motor Fed by Back-to-Back Dual Three-Level Converter", TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY, vol. 26, no. 3, 1 March 2011 (2011-03-01), pages 36 - 43, XP055923879, ISSN: 1000-6753, DOI: 10.19595/j.cnki.1000-6753.tces.2011.03.005
See also references of EP 4156501A4
See also references of EP 4156501A4
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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