Title:
MOTOR DRIVER AND MOTOR DRIVING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/040609
Kind Code:
A1
Abstract:
Provided is a motor driver (30), comprising: a passive alternating-current (AC)/direct-current (DC) converter (310), a DC link circuit (320), an inverter (330), and a filter circuit (340). The passive AC/DC converter (310) comprises three AC/DC conversion branch circuits and is used for converting an inputted AC voltage into a DC voltage. The DC link circuit (320) is connected to the passive AC/DC converter (310), is used for filtering the DC voltage outputted by the passive AC/DC converter (310), and comprises: a capacitor circuit comprising first and second capacitors which are connected in series, the capacitor circuit being provided between a positive electrode output end and a negative electrode output end of the passive AC/DC converter (310); and a fourth DC/AC conversion branch circuit (3201) comprising two switching devices. The inverter (330) comprises first to third DC/AC conversion branch circuits (3301, 3302, 3303) arranged in parallel between the positive electrode output end and the negative electrode output end, wherein the first to third DC/AC conversion branch circuits each comprise two switching devices. The filter circuit (340) comprises first to fourth filters, which are respectively arranged between a node located between the first and second capacitors and a node located between the two switching devices in each of the first to fourth DC/AC conversion branch circuits (3301, 3302, 3303, 3201).
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Inventors:
LIAO HUA (CN)
Application Number:
PCT/CN2022/115275
Publication Date:
February 29, 2024
Filing Date:
August 26, 2022
Export Citation:
Assignee:
SIEMENS AG (DE)
SIEMENS LTD CHINA (CN)
SIEMENS LTD CHINA (CN)
International Classes:
H02P27/08; H02M1/32; H02M7/48; H02P25/16
Foreign References:
| CN207475439U | 2018-06-08 | |||
| JP2005094918A | 2005-04-07 | |||
| JP2007259688A | 2007-10-04 | |||
| CN110545048A | 2019-12-06 | |||
| JP2008131756A | 2008-06-05 |
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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