Title:
WIRELESS CHARGING CONTROL METHOD, WIRELESS CHARGING TRANSMITTER AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/010861
Kind Code:
A1
Abstract:
The present application provides a wireless charging control method for an electric automobile, a wireless charging transmitter and a system. The transmitter comprises an inner-loop control circuit, a booster circuit, an inverter circuit, and a transmitting coil. The inner-loop control circuit is connected to the booster circuit and the inverter circuit. An input end and an output end of the inverter circuit are connected to the booster circuit and the transmitting coil, respectively. The inner-loop control circuit is used for obtaining a first current reference signal and a current sampling signal of the transmitting coil, comparing the first current reference signal with the current sampling signal to obtain an absolute value of a difference between the first current reference signal and the current sampling signal, and adjusting a phase-shift angle of the inverter circuit and/or a duty ratio of the booster circuit when the absolute value is greater than a preset deviation, so that the absolute value of the difference between the first current reference signal and the current sampling signal of the adjusted transmitting coil is less than or equal to the preset deviation, thereby effectively broadening the current adjusting range of the transmitting coil to reduce system power loss.
Inventors:
WU ZHIXIAN (CN)
MAO YUNHE (CN)
ZENG XIAOSHENG (CN)
CHEN SHUANGQUAN (CN)
MAO YUNHE (CN)
ZENG XIAOSHENG (CN)
CHEN SHUANGQUAN (CN)
Application Number:
PCT/CN2019/077263
Publication Date:
January 16, 2020
Filing Date:
March 07, 2019
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H02J7/02
Domestic Patent References:
| WO2017047454A1 | 2017-03-23 |
Foreign References:
| CN205646956U | 2016-10-12 | |||
| CN103560599A | 2014-02-05 | |||
| CN104821667A | 2015-08-05 | |||
| CN104795903A | 2015-07-22 | |||
| CN201810752499A | 2018-07-10 |
Other References:
See also references of EP 3799254A4
Attorney, Agent or Firm:
LEADER PATENT & TRADEMARK FIRM (CN)
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