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1. WO2020114077 - RECEIVING END AND TRANSMITTING END FOR WIRELESS CHARGING SYSTEM, METHOD, ELECTRICAL TERMINAL, AND WIRELESS CHARGING SYSTEM

Publication Number WO/2020/114077
Publication Date 11.06.2020
International Application No. PCT/CN2019/110545
International Filing Date 11.10.2019
IPC
H02J 7/02 2016.01
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 2006.01
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 2019.01
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 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
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
Applicants
  • 华为技术有限公司 HUAWEI TECHNOLOGIES CO., LTD. [CN]/[CN]
Inventors
  • 毛云鹤 MAO, Yunhe
  • 刘彦丁 LIU, Yanding
Priority Data
201811488672.606.12.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) RECEIVING END AND TRANSMITTING END FOR WIRELESS CHARGING SYSTEM, METHOD, ELECTRICAL TERMINAL, AND WIRELESS CHARGING SYSTEM
(FR) EXTRÉMITÉ DE RÉCEPTION ET EXTRÉMITÉ DE TRANSMISSION POUR SYSTÈME DE CHARGE SANS FIL, PROCÉDÉ, TERMINAL ÉLECTRIQUE ET SYSTÈME DE CHARGE SANS FIL
(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)
A receiving end and a transmitting end for a wireless charging system, a method, an electrical terminal, and a wireless charging system. The receiving end comprises: a receiving coil, a receiving end compensation circuit, a rectifier, and a controller. The controller adjusts a phase difference between a first leg and a second leg of the rectifier, and a phase shift angle between a leg voltage and an input current fundamental component of the rectifier so that a zero voltage switching (ZVS) is achieved for a controllable switch tube of the rectifier. The size of the fundamental component of the leg voltage is adjusted by adjusting the phase difference between two legs of the rectifier so as to adjust a real part of the equivalent impedance of the rectifier. The equivalent impedance of the rectifier comprises a real part and an imaginary part. The real part refers to resistance, and the imaginary part refers to reactance. When the imaginary part of the equivalent impedance of the rectifier is small, the equivalent impedance of the rectifier is considered to be a purely resistive impedance, and a ZVS effect is achieved for the controllable switch tube. An inductance compensation module can weaken the capacitive part of the equivalent impedance, reduce the reactive power of the wireless charging system, and improve the system efficiency of the wireless charging system.
(FR)
L'invention concerne une extrémité de réception et une extrémité de transmission pour un système de charge sans fil, un procédé, un terminal électrique et un système de charge sans fil. L'extrémité de réception comprend : une bobine de réception, un circuit de compensation d'extrémité de réception, un redresseur et un dispositif de commande. Le dispositif de commande ajuste une différence de phase entre une première branche et une seconde branche du redresseur, et un angle de déphasage entre une tension de branche et une composante fondamentale de courant d'entrée du redresseur de telle sorte qu'une commutation de tension nulle (ZVS) est obtenue pour un tube de commutation commandable du redresseur. La taille de la composante fondamentale de la tension de branche est ajustée par ajustement de la différence de phase entre deux branches du redresseur de manière à ajuster une partie réelle de l'impédance équivalente du redresseur. L'impédance équivalente du redresseur comprend une partie réelle et une partie imaginaire. La partie réelle se réfère à une résistance, et la partie imaginaire se réfère à une réactance. Lorsque la partie imaginaire de l'impédance équivalente du redresseur est petite, l'impédance équivalente du redresseur est considérée comme étant une impédance purement résistive, et un effet ZVS est obtenu pour le tube de commutation commandable. Un module de compensation d'inductance peut affaiblir la partie capacitive de l'impédance équivalente, réduire la puissance réactive du système de charge sans fil, et améliorer l'efficacité du système de charge sans fil.
(ZH)
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。
Also published as
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