Title:
CHARGING APPARATUS, CONTROL METHOD THEREFOR, AND CHARGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/203870
Kind Code:
A1
Abstract:
The embodiments of the present application relate to the technical field of terminal device charging, and provide a charging apparatus, a control method therefor, and a charging system. The present application is used to prevent the voltage of a clamping capacitor being too high, which leads to problems such as short circuiting or an open circuit. The charging apparatus comprises a rectification circuit, a transformer, a lower bridge switch, a clamping capacitor, an upper bridge switch, and a controller. The transformer comprises a primary coil and at least one secondary coil. The controller is used for controlling the upper bridge switch and the lower bridge switch to alternatingly turn on. The controller is further used for obtaining, when the lower bridge switch is turned off, a sampling waveform at the location at which the controller and the transformer are electrically connected, and, when the sampling waveform is abnormal, turning off the lower bridge switch in a first phase of a next charging period. The sampling waveform comprises a voltage waveform of the primary coil or a voltage waveform of the secondary coil.
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Inventors:
SUN CHENGHAO (CN)
LIU CHENGYONG (CN)
REN JIE (CN)
ZHANG XUE (CN)
LIU CHENGYONG (CN)
REN JIE (CN)
ZHANG XUE (CN)
Application Number:
PCT/CN2021/078780
Publication Date:
October 14, 2021
Filing Date:
March 02, 2021
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H02J7/00
Foreign References:
| CN111525662A | 2020-08-11 | |||
| CN108988652A | 2018-12-11 | |||
| CN102122890A | 2011-07-13 | |||
| CN210120487U | 2020-02-28 | |||
| CN1604440A | 2005-04-06 | |||
| US20180287481A1 | 2018-10-04 | |||
| CN110829557A | 2020-02-21 | |||
| CN202010279469A | 2020-04-10 |
Other References:
See also references of EP 4102677A4
Attorney, Agent or Firm:
BEIJING ZBSD PATENT&TRADEMARK AGENT LTD. (CN)
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