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1. CN109327065 - Receiver of wireless charging system, control method of receiver, electrical terminal, transmitter of wireless charging system and wireless charging system

Office China
Application Number 201811488672.6
Application Date 06.12.2018
Publication Number 109327065
Publication Date 12.02.2019
Grant Number 109327065
Grant Date 21.02.2020
Publication Kind B
IPC
H02J 7/02
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
7Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
02for charging batteries from ac mains by converters
H02M 7/219
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
7Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
02Conversion of ac power input into dc power output without possibility of reversal
04by static converters
12using discharge tubes with control electrode or semiconductor devices with control electrode
21using devices of a triode or transistor type requiring continuous application of a control signal
217using semiconductor devices only
219in a bridge configuration
B60L 53/22
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
53Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
20characterised by converters located in the vehicle
22Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
CPC
H02J 7/025
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
7Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
02for charging batteries from ac mains by converters
022characterised by the type of converter
025using non-contact coupling, e.g. inductive, capacitive
H02M 7/219
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
7Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
02Conversion of ac power input into dc power output without possibility of reversal
04by static converters
12using discharge tubes with control electrode or semiconductor devices with control electrode
21using devices of a triode or transistor type requiring continuous application of a control signal
217using semiconductor devices only
219in a bridge configuration
H02M 2001/0058
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
1Details of apparatus for conversion
0048Circuits or arrangements for reducing losses
0054Transistor switching losses
0058by employing soft switching techniques, i.e. commutation of transistor when voltage applied to it is zero and/or when current flowing through it is zero
Applicants HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors MAO YUNHE
毛云鹤
LIU YANDING
刘彦丁
Agents 深圳市深佳知识产权代理事务所(普通合伙) 44285
Title
(EN) Receiver of wireless charging system, control method of receiver, electrical terminal, transmitter of wireless charging system and wireless charging system
(ZH) 无线充电系统的接收端、方法、用电终端、发射端及系统
Abstract
(EN)
The invention discloses a receiver of a wireless charging system, a control method of the receiver, an electrical terminal, a transmitter of the wireless charging system and a wireless charging system. The receiver includes a receiving coil, a receiver compensation circuit, a rectifier and a controller; the controller adjusts a phase difference between first and second bridge arms of the rectifierand adjusts a phase shift angle between bridge arm voltage of the rectifier and input current fundamentals component of the rectifier, thereby allowing zero-voltage on and off of a controllable switch of the rectifier. The magnitude of the fundamental component of the bridge arm voltage is adjusted by adjusting the phase difference between the two bridge arms of the rectifier, thereby adjusting areal part of equivalent impedance of the rectifier. The equivalent impedance of the rectifier includes the real part and a virtual part; the real part refers to resistance; the virtual part refers toreactance. When the virtual part of the equivalent impedance of the rectifier is very small, the equivalent impedance of the rectifier is considered as pure-resistive impedance, and the controllableswitch tube gains ZVS (zero-voltage switching) effect. An inductance compensation module helps weaken the capacitive portion of the equivalent impedance, thereby lowering reactive power of the wireless charging system and improving system efficiency of the wireless charging system.

(ZH)
本发明公开了一种无线充电系统的接收端、方法、用电终端、发射端及系统,接收端包括:接收线圈、接收端补偿电路、整流器和控制器;控制器调节整流器的第一桥臂和第二桥臂之间的相位差,调节整流器的桥臂电压和整流器的输入电流基波分量的移相角,以使整流器的可控开关管实现零电压开关。通过调节整流器的两个桥臂之间的相位差来调节桥臂电压的基波分量的大小,调节整流器的等效阻抗的实部。整流器的等效阻抗包括实部和虚部,实部指电阻,虚部指电抗。整流器的等效阻抗虚部很小时,整流器的等效阻抗看作纯阻性阻抗,可控开关管达到ZVS效果。电感补偿模块可以削弱等效阻抗的容性部分,降低无线充电系统的无功功率,提高无线充电系统的系统效率。

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