Title:
WIRELESS CHARGER AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2019/228159
Kind Code:
A1
Abstract:
A wireless charger (101) and a control method. The wireless charger (101) comprises: an E-type power amplifier (1011) and an impedance-adjustable circuit (1012) connected to an output end of the E-type power amplifier (1011); the E-type power amplifier (1011) comprises: a switching tube (Q) and a capacitance-adjustable circuit (10111) connected in parallel to the switching tube (Q); the wireless charger (101) further comprises: a control unit (1015), configured to obtain a constraint condition of the E-type power amplifier (1011), determine N1 target equivalent load impedances of the E-type power amplifier (1011) according to the constraint condition, adjust the capacitance value of the capacitance-adjustable circuit (10111) in the E-type power amplifier (1011), and adjust the impedance value of the impedance-adjustable circuit (1012) so that an equivalent load impedance of the E-type power amplifier (1011) matches one target equivalent load impedance in the N1 target equivalent load impedances. Since the equivalent load impedance of the E-type power amplifier (1011) matches the target equivalent load impedance, the wireless charger can implement efficient and stable output of the E-type power amplifier (1011).
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Inventors:
LIU QITANG (CN)
ZENG XIAOSHENG (CN)
LIU SHUANGKE (CN)
MA CHENGBIN (CN)
ZENG XIAOSHENG (CN)
LIU SHUANGKE (CN)
MA CHENGBIN (CN)
Application Number:
PCT/CN2019/085946
Publication Date:
December 05, 2019
Filing Date:
May 08, 2019
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H02J50/00
Foreign References:
| CN102355032A | 2012-02-15 | |||
| CN104243721A | 2014-12-24 | |||
| CN206894365U | 2018-01-16 | |||
| US20040008082A1 | 2004-01-15 | |||
| US20170302110A1 | 2017-10-19 | |||
| CN201810548622A | 2018-05-31 |
Other References:
See also references of EP 3793059A4
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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