Title:
ELECTROLYTIC CAPACITOR-FREE POWER CONVERTER FOR PERMANENT MAGNET SYNCHRONOUS MOTOR, AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/001144
Kind Code:
A1
Abstract:
The present invention provides an electrolytic capacitor-free power converter for a permanent magnet synchronous motor, and a control method therefor. The power converter comprises a rectifier circuit, a power decoupling circuit and a three-phase inverter bridge which are sequentially connected in series. The power decoupling circuit comprises a Boost converter and a pulsating power buffer circuit, and non-equivalent small-capacity film capacitors at two circuit output ends are connected in series to form a direct-current bus of the electrolytic capacitor-free power converter. The Boost converter is used for controlling the quality of electric energy of a power grid, and a capacitor voltage output by the Boost converter contains direct current and alternating current components. The pulsating power buffer circuit realizes voltage complementation between the non-equivalent film capacitors by controlling the pulsating power of the power grid, thereby effectively inhibiting the voltage pulsation of the direct-current bus. In addition, the electrolytic capacitor-free power converter of the present invention improves a voltage gain of the direct-current bus, and broadens the range of a rotating speed of the permanent magnet synchronous motor.
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Inventors:
ZHANG CHAO (CN)
GAO RONGWEI (CN)
XU LEI (CN)
ZHU XIAOYONG (CN)
DU YI (CN)
QIN YUANYUAN (CN)
GAO RONGWEI (CN)
XU LEI (CN)
ZHU XIAOYONG (CN)
DU YI (CN)
QIN YUANYUAN (CN)
Application Number:
PCT/CN2022/144068
Publication Date:
January 04, 2024
Filing Date:
December 30, 2022
Export Citation:
Assignee:
UNIV JIANGSU (CN)
International Classes:
H02M5/458
Foreign References:
| CN115242103A | 2022-10-25 | |||
| CN111064416A | 2020-04-24 | |||
| CN113258795A | 2021-08-13 | |||
| US11012002B1 | 2021-05-18 |
Other References:
ZHANG CHAO; XU LEI; ZHU XIAOYONG; DU YI; QUAN LI: "Elimination of DC-Link Voltage Ripple in PMSM Drives With a DC-Split-Capacitor Converter", IEEE TRANSACTIONS ON POWER ELECTRONICS, INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, USA, vol. 36, no. 7, 30 December 2020 (2020-12-30), USA , pages 8141 - 8154, XP011841233, ISSN: 0885-8993, DOI: 10.1109/TPEL.2020.3048183
朱红林 (ZHU, HONGLIN): "分裂电容无电解电容永磁同步电机驱动系统设计与研究 (Design and Research of Electrolytic Capacitor-less PMSM Drive System Based on Split Capacitor Converter)", 万方数据库 (WANFANG DATA), 31 October 2022 (2022-10-31)
朱红林 (ZHU, HONGLIN): "分裂电容无电解电容永磁同步电机驱动系统设计与研究 (Design and Research of Electrolytic Capacitor-less PMSM Drive System Based on Split Capacitor Converter)", 万方数据库 (WANFANG DATA), 31 October 2022 (2022-10-31)
Attorney, Agent or Firm:
NANJING DOYES INTELLECTUAL PROPERTY CO., LTD. (CN)
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