CN109038736B - 一种充电电路移相控制方法 - Google Patents

一种充电电路移相控制方法 Download PDF

Info

Publication number
CN109038736B
CN109038736B CN201810910880.4A CN201810910880A CN109038736B CN 109038736 B CN109038736 B CN 109038736B CN 201810910880 A CN201810910880 A CN 201810910880A CN 109038736 B CN109038736 B CN 109038736B
Authority
CN
China
Prior art keywords
conversion circuit
group
power switch
output
electric current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810910880.4A
Other languages
English (en)
Other versions
CN109038736A (zh
Inventor
刘钧
冯颖盈
姚顺
徐金柱
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Weimeisi New Energy (Group) Co.,Ltd.
Original Assignee
Shenzhen Weimei New Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Weimei New Energy Co Ltd filed Critical Shenzhen Weimei New Energy Co Ltd
Priority to CN201810910880.4A priority Critical patent/CN109038736B/zh
Priority to PCT/CN2018/100707 priority patent/WO2020029312A1/zh
Publication of CN109038736A publication Critical patent/CN109038736A/zh
Priority to EP19186186.3A priority patent/EP3609065B1/en
Priority to KR1020190085389A priority patent/KR102232926B1/ko
Priority to JP2019131127A priority patent/JP6816901B2/ja
Priority to US16/521,720 priority patent/US10651669B2/en
Application granted granted Critical
Publication of CN109038736B publication Critical patent/CN109038736B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/24—Using the vehicle's propulsion converter for charging
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/285—Single converters with a plurality of output stages connected in parallel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/52—Drive Train control parameters related to converters
    • B60L2240/527—Voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/52—Drive Train control parameters related to converters
    • B60L2240/529—Current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION 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
    • B60L2260/00—Operating Modes
    • B60L2260/40—Control modes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0083—Converters characterised by their input or output configuration
    • H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

本发明公开了一种充电电路移相控制方法，包括原边转换电路、副边第一转换电路、副边第二转换电路；所述控制器对原边转换电路中功率开关的通断波形与副边第一转换电路中功率开关的通断波形存在相角差Φ；所述控制器通过副边第一电流采集器和副边第一电压采集器采集到副边第一转换电路输出电流（Io1）和输出电压（Vo1），将采集到的输出电流和输出电压与预设的输出电流和输出电压进行比较和计算，根据比较结果调整相角差Φ的大小和正负；本发明在主路输出轻载和空载的时候亦可稳定变压器中的磁通量，保障辅路能从变压器正常吸取电能、正常向外供电；同时能方便的控制电量在各端口中的转换方向和转换数量。

Description

一种充电电路移相控制方法
技术领域
本发明涉及电动汽车充电技术领域，尤其涉及一种具有三端口的充电电路移相控制方法。
背景技术
随着节能减排，以及控制大气污染的需求，新能源汽车逐渐在市场上得到推广运用，其中电动汽车更是新能源汽车的主力军。电动汽车的车载充电机是电动汽车中重要的组成部分，车载充电机一般具有一个交流输入端、两个直流输出端，交流输入端连接市电网络，第一直流输出端给高压电池充电，相当于主路输出；第二直流输出端给车内用电设备和低压小电池供电，相当于辅路输出。这种传统的变压器集成的多端口电源输出中，会遇到功率自动分配的问题，也就是输出功率交叉调整的问题。此问题的影响是，主路的输出功率的大小，会同时影响到辅路的输出功率的大小。例如主路的输出功率较小或者空载时（相当于第一直流输出端的高压电池即将充满或已经充满），主控会发出很小的占空比，甚至进入到间歇工作模式，而此时变压器中的磁通量很小，或几乎为零，辅路的绕组上感应电压也将有可能为零，辅路如果需要较大输出的功率（相当于在车内使用车载电器），会出现输出功率不会无法满足使用需求的。
故此业内亟需设计一种控制方法，可以在主路输出轻载和空载的时候亦可稳定变压器中的磁通量，保障辅路能从变压器正常吸取电能；同时能方便的控制电量在各端口中的转换方向和转换数量。
发明内容
本发明是要解决现有技术的上述问题，提出一种充电电路移相控制方法。
为解决上述技术问题，本发明提出的技术方案是设计
一种充电电路移相控制方法，充电电路包括原边转换电路、副边第一转换电路、副边第二转换电路、以及连接这三个电路的变压器；其中原边转换电路中具有第一组功率开关和第二组功率开关，两组功率开关通断动作相反；副边第一转换电路具有第三组功率开关和第四组功率开关，两组功率开关通断动作相反，第一组和第二组功率开关之间串接第一电容和第一电感以及所述变压器中的原边绕组；其还包括采集副边第一转换电路参数的副边第一电流采集器和副边第一电压采集器、以及连接各采集器和各功率开关的控制器；所述控制器对原边转换电路中的第一组和第二组功率开关发波控制，同时对副边第一转换电路中的第三组和第四组功率开关发波控制，并且使第一组功率开关通断的波形与第三组功率开关通断的波形之间存在相角差Φ；所述控制器通过副边第一电流采集器和副边第一电压采集器采集到副边第一转换电路输出电流和输出电压，将采集到的输出电流和输出电压与预设的输出电流和输出电压进行比较和计算，根据比较结果调整相角差Φ的大小和正负。
所述第一组、第二组、第三组和第四组功率开关导通的占空比皆为50%。
所述控制器通过副边第一电流采集器和副边第一电压采集器采集到副边第一转换电路输出电流和输出电压、并将第一转换电路输出电流和输出电压与预设值比较；当第一转换电路输出电流和输出电压小于预设值时，控制器调整对第三组和第四组功率开关发波控制，使相角差Φ增大，使得第一转换电路输出电流和输出电压接近或等于预设值；当第一转换电路输出电流和输出电压大于预设值时，控制器调整对第三组和第四组功率开关发波控制，使相角差Φ减小，使得第一转换电路输出电流和输出电压接近或等于预设值。
所述控制器设有充电模式和逆变模式；在充电模式中，电能由原边转换电路流向副边第一转换电路；在逆变模式中，电能由副边第一转换电路流向原边转换电路。
采集副边第一转换电路输出电流和输出电压，计算副边第一转换电路的输出功率，根据输出功率的大小，调整第一组至第四组功率开关的发波周期。
预先设置副边第一转换电路等效阻抗与开关周期对照表，预先设置满载输出功率Pout、以及原边绕组匝数W1和副边第一绕组匝数W2，检测原边转换电路的输入电压，
根据公式计算出副边第一转换电路的阻抗Zo1，
根据公式 计算出原边转换电路等效阻抗Zin，
用第一转换电路等效阻抗在对照表中查找开关周期，控制器按照开关周期控制第一组至第四组功率开关的发波周期。
所述控制器将采集到的副边第一转换电路输出电流和输出电压进行比较和补偿，用所得补偿值产生相角差Φ，第一组功率开关的发波时刻加上相角差Φ为第三组功率开关发波时刻。
所述比较和补偿包括将副边第一转换电路输出电流同第一基准值进行差值运算，对两者的差值进行环路补偿，将所得补偿值与预先设定的电压环预设值做取小运算、取其小值作为电压环基准值，将副边第一转换电路输出电压同所述电压环基准值进行差值运算，对两者的差值进行环路补偿，用所得补偿值产生相角差Φ。
与现有技术相比，本发明一颗DSP（数字信号处理器），同时控制两端输出电压，在主路输出轻载和空载的时候亦可稳定变压器中的磁通量，保障辅路能从变压器正常吸取电能、正常向外供电；同时能方便的控制电量在各端口中的转换方向和转换数量。
附图说明
图1为拓扑结构图；
图2为移相控制逻辑时序；
图3为相角差Φ滞后的仿真波形图；
图4为相角差Φ超前的仿真波形图；
图5为移相控制实测波形图；
图6为原、副边阻抗模型图；
图7为原边转换电路等效阻抗Zin与开关周期Ts对照图；
图8为控制原理框图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明作进一步详细说明。应当理解，此处所描述的具体实施例仅仅用于解释本发明，并不用于限定本发明。
本发明中，采用了移相控制主路的输出功率，无论主路输出功率大小如何变化，变压器中始终存在磁通量，此时辅路的绕组上始终有根据绕组对折算的感应的电压，因此，辅路如果需要较大输出的功率，是不会存在问题的，这就解决了传统的变压器集成的电源的功率自动分配的问题。
参看图1示出的拓扑结构图，一种充电电路移相控制方法，充电电路包括原边转换电路、副边第一转换电路、副边第二转换电路、以及连接这三个电路的变压器；其中原边转换电路中具有第一组功率开关Q1、Q4和第二组功率开关Q2、Q3，两组功率开关通断动作相反；副边第一转换电路具有第三组功率开关Q5、Q8和第四组功率开关Q6、Q7，两组功率开关通断动作相反，第一组和第二组功率开关之间串接第一电容C1和第一电感L1以及所述变压器中的原边绕组；其特征在于：还包括采集副边第一转换电路参数的副边第一电流采集器和副边第一电压采集器、以及连接各采集器和各功率开关的控制器；所述控制器对原边转换电路中的第一组和第二组功率开关发波控制，同时对副边第一转换电路中的第三组和第四组功率开关发波控制，并且使第一组功率开关通断的波形与第三组功率开关通断的波形之间存在相角差Φ；所述控制器通过副边第一电流采集器和副边第一电压采集器采集到副边第一转换电路输出电流Io1和输出电压Vo1，将采集到的输出电流和输出电压与预设的输出电流和输出电压进行比较和计算，根据比较结果调整相角差Φ的大小和正负。
在较佳实施例中，所述第一组、第二组、第三组和第四组功率开关导通的占空比皆为50%。
所述控制器通过副边第一电流采集器和副边第一电压采集器采集到副边第一转换电路输出电流Io1和输出电压Vo1、并将第一转换电路输出电流和输出电压与预设值比较；当第一转换电路输出电流和输出电压小于预设值时，控制器调整对第三组和第四组功率开关发波控制，使相角差Φ增大，使得第一转换电路输出电流和输出电压接近或等于预设值；当第一转换电路输出电流和输出电压大于预设值时，控制器调整对第三组和第四组功率开关发波控制，使相角差Φ减小，使得第一转换电路输出电流和输出电压接近或等于预设值。
参看图2，相角差Φ增大，相对于第一组功率开关导通波形第三组功率开关导通波形是往右移；相角差Φ减小相对于第一组功率开关导通波形第三组功率开关导通波形是往左移。需要指出，所谓开关导通的占空比为50%实际上包含死区时间，死区时间是PWM输出时，为了使上下桥臂不会因为开关速度问题发生同时导通而设置的一个保护时段。死区时间越小，输出波形越好，但是会降低可靠性，一般为us级。因本发明不调节死区时间，为描述方便，故此将开关导通的占空比笼统称为50%，实际上导通时间略小于50%。
所述控制器设有充电模式和逆变模式；在充电模式中，电能由原边转换电路流向副边第一转换电路；在逆变模式中，电能由副边第一转换电路流向原边转换电路。
参看图2示出的移相控制逻辑时序。Q1～Q4，Q5～Q8全部按照50%的占空比进行发波，其中Q1和Q4时序一致，Q2和Q3时序一致， 两者之间有死区时间；Q5和Q8时序一致，Q6和Q7时序一致， 两者之间有死区时间；最为核心的控制为：Q1～Q4，Q5～Q8之间的发波存在相角差Φ。通过控制Q1～Q4，Q5～Q8之间的相角差Φ，从而控制能量在“原边转换电路”和“副边第一转换电路”之间的传递方向以及大小。当Q5～Q8按照50%的占空比进行发波时，考虑到C4是属于电容特性“隔直通交”，则变压器T1的W2绕组两端电压是控制在“副边第一转换电路”的输出电压正负交互翻转；此时T1的W3和W4绕组电压则是根据变压器的W2/W3或者W2/W4映射出对应电压值，此时“副边第二转换电路”则可以通过控制Q11和D1形成一个Buck降压电路，且输出功率完全可控。
参看图3示出的相角差Φ滞后的仿真波形图。其中Q5～Q8相角滞后于Q1～Q4，仿真中设置滞后角度为30%；其中Iout是指副边第一转换电路的输出电流，可见此时输出电流为21.8A；I_L1为电感L1中的电流；V_AB为图1中AB两点的电压；V_W2为图1中W2两端的电压。由于Q5～Q8相角滞后于Q1～Q4，此时能量由“原边转换电路”向“副边第一转换电路”进行传递。
参看图4示出的相角差Φ超前的仿真波形图。其中Q5～Q8相角超前于Q1～Q4，仿真中设置超前角度为30%；其中Iout是指副边第一转换电路的输出电流，可见此时输出电流为-23.3A；I_L1为电感L1中的电流；V_AB为图1中AB两点的电压；V_W2为图1中W2两端的电压。由于Q5～Q8相角超前于Q1～Q4，此时能量由“副边第一转换电路”向“原边转换电路”进行传递；
图5为移相控制实测波形图，与仿真波形基本保持一致。可见超前和滞后两种相角的控制方式中，由于副边第一转换电路始终按照50%对称发波，变压器T1中的励磁始终存在，因此W2和W3/W4的电压始终按照匝比进行映射。无论何时副边第二转换电路需要功率，都可以保持。
在控制相角差Φ的同时，也控制原边转换电路、副边第一转换电路的开关周期：Ts。其意义在于，由于原边转换电路中存在电感L1和电容C1，两者组成一个可以随开关周期变化而等效电抗发生变化的网络，其数学表达式为：
其中Z（Ts）便是随着Ts变化，L1和C1等效电抗的变化。实际应用中，为了提高效率，避免无功能量过多，会通过控制Ts，从而改变Z（Ts），进而得出最优匹配特性，其数学描述如下：我们可以将图1简化为图6示出的原、副边阻抗模型图。
具体实施例，如L1为30uH，C1为300nF，此时Z（Ts）的电抗曲线如图7所示。横坐标为周期，纵坐标为阻抗。根据输出负载的大小，找出阻抗，再选择合适的Ts，从而获得较优的Z（Ts），如此时输出功率为满载，6.6Kw，输出电压为400V，原边绕组匝数W1为14匝，副边第一绕组匝数W2为15匝，则W2所等效阻抗为：
其映射到W1的阻抗为：
按照设计电抗匹配的思路，将Z（Ts）控制在和阻抗映射值基本一致，如图7，则Ts为：13.53us，此时对应的开关频率为74kHz。
在较佳实施例中，采集副边第一转换电路输出电流Io1和输出电压Vo1，计算副边第一转换电路的输出功率，根据输出功率的大小，调整第一组至第四组功率开关的发波周期。
在较佳实施例中，预先设置原边转换电路等效阻抗Zin与开关周期Ts对照表，预先设置满载输出功率Pout，对照表为图7一类对照图的表格化。原边绕组匝数W1和副边第一绕组匝数W2，检测副边第一转换电路的输出电压Vo1，
根据公式计算出副边第一转换电路的阻抗Zo1，
根据公式计算出原边转换电路等效阻抗Zin
用原边转换电路等效阻抗Zin在对照表中查找开关对应的周期Ts，控制器按照开关周期Ts控制第一组至第四组功率开关的发波周期。
图8示出了较佳实施例的控制原理框图。所述控制器将采集到的副边第一转换电路输出电流Io1和输出电压Vo1进行比较和补偿，用所得补偿值产生相角差Φ，第一组功率开关Q1、Q4的发波时刻加上相角差Φ为第三组功率开关Q5、Q8发波时刻。参看图2示出的移相控制逻辑时序，第一和第二组功率开关的导通和截止动作相反，第三和第四组功率开关的导通和截止动作相反。
所述比较和补偿包括将副边第一转换电路输出电流Io1同第一基准Iref1值进行差值运算，对两者的差值进行环路补偿，将所得补偿值与预先设定的电压环预设值Vset1做取小运算、取其小值作为电压环基准值Vref1，将副边第一转换电路输出电压Vo1同所述电压环基准值进行差值运算，对两者的差值进行环路补偿，用所得补偿值产生相角差Φ。
以上实施例仅为举例说明，非起限制作用。任何未脱离本申请精神与范畴，而对其进行的等效修改或变更，均应包含于本申请的权利要求范围之中。

Claims (5)

1.一种充电电路移相控制方法，充电电路包括原边转换电路、副边第一转换电路、副边第二转换电路、以及连接这三个电路的变压器；其中原边转换电路中具有第一组功率开关（Q1、Q4）和第二组功率开关（Q2、Q3），两组功率开关通断动作相反；副边第一转换电路具有第三组功率开关（Q5、Q8）和第四组功率开关（Q6、Q7），两组功率开关通断动作相反，第一组和第二组功率开关之间串接第一电容（C1）和第一电感（L1）以及所述变压器中的原边绕组；其特征在于：还包括采集副边第一转换电路参数的副边第一电流采集器和副边第一电压采集器、以及连接各采集器和各功率开关的控制器；
所述控制器对原边转换电路中的第一组和第二组功率开关发波控制，同时对副边第一转换电路中的第三组和第四组功率开关发波控制，并且使第一组功率开关通断的波形与第三组功率开关通断的波形之间存在相角差Φ；
所述控制器通过副边第一电流采集器和副边第一电压采集器采集到副边第一转换电路输出电流（Io1）和输出电压Vo1，将采集到的输出电流和输出电压与预设的输出电流和输出电压进行比较和计算，根据比较结果调整相角差Φ的大小和正负；
所述控制器通过副边第一电流采集器和副边第一电压采集器采集到副边第一转换电路输出电流（Io1）和输出电压Vo1、并将第一转换电路输出电流和输出电压与预设值比较；当第一转换电路输出电流和输出电压小于预设值时，控制器调整对第三组和第四组功率开关发波控制，使相角差Φ增大，使得第一转换电路输出电流和输出电压接近或等于预设值；当第一转换电路输出电流和输出电压大于预设值时，控制器调整对第三组和第四组功率开关发波控制，使相角差Φ减小，使得第一转换电路输出电流和输出电压接近或等于预设值；
采集副边第一转换电路输出电流（Io1）和输出电压Vo1，计算副边第一转换电路的输出功率，根据输出功率的大小，调整第一组至第四组功率开关的发波周期；
预先设置原边转换电路等效阻抗Zin与开关周期Ts对照表，预先设置满载输出功率Pout、以及原边绕组匝数W1和副边第一绕组匝数W2，检测副边第一转换电路的输出电压Vo1，
根据公式计算出副边第一转换电路的阻抗Zo1，
根据公式 计算出原边转换电路等效阻抗Zin
用原边转换电路等效阻抗Zin在对照表中查找开关对应的周期Ts，控制器按照开关周期Ts控制第一组至第四组功率开关的发波周期。
2.如权利要求1所述的充电电路移相控制方法，其特征在于：所述第一组、第二组、第三组和第四组功率开关导通的占空比皆为50%。
3.如权利要求2所述的充电电路移相控制方法，其特征在于：所述控制器设有充电模式和逆变模式；
在充电模式中，电能由原边转换电路流向副边第一转换电路；
在逆变模式中，电能由副边第一转换电路流向原边转换电路。
4.如权利要求1所述的充电电路移相控制方法，其特征在于：所述控制器将采集到的副边第一转换电路输出电流（Io1）和输出电压Vo1进行比较和补偿，用所得补偿值产生相角差Φ，第一组功率开关（Q1、Q4）的发波时刻加上相角差Φ为第三组功率开关（Q5、Q8）发波时刻。
5.如权利要求4所述的充电电路移相控制方法，其特征在于：所述比较和补偿包括将副边第一转换电路输出电流（Io1）同第一基准（Iref1）值进行差值运算，对两者的差值进行环路补偿，将所得补偿值与预先设定的电压环预设值（Vset1）做取小运算、取其小值作为电压环基准值（Vref1），将副边第一转换电路输出电压Vo1同所述电压环基准值进行差值运算，对两者的差值进行环路补偿，用所得补偿值产生相角差Φ。
CN201810910880.4A 2018-08-10 2018-08-10 一种充电电路移相控制方法 Active CN109038736B (zh)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN201810910880.4A CN109038736B (zh) 2018-08-10 2018-08-10 一种充电电路移相控制方法
PCT/CN2018/100707 WO2020029312A1 (zh) 2018-08-10 2018-08-15 一种充电电路移相控制方法
EP19186186.3A EP3609065B1 (en) 2018-08-10 2019-07-15 Phase shift control method for charging circuit
KR1020190085389A KR102232926B1 (ko) 2018-08-10 2019-07-15 충전 회로의 위상 시프트 제어 방법
JP2019131127A JP6816901B2 (ja) 2018-08-10 2019-07-16 充電回路の位相シフト制御方法
US16/521,720 US10651669B2 (en) 2018-08-10 2019-07-25 Phase shift control method for charging circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810910880.4A CN109038736B (zh) 2018-08-10 2018-08-10 一种充电电路移相控制方法

Publications (2)

Publication Number Publication Date
CN109038736A CN109038736A (zh) 2018-12-18
CN109038736B true CN109038736B (zh) 2019-10-18

Family

ID=64633670

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810910880.4A Active CN109038736B (zh) 2018-08-10 2018-08-10 一种充电电路移相控制方法

Country Status (6)

Country Link
US (1) US10651669B2 (zh)
EP (1) EP3609065B1 (zh)
JP (1) JP6816901B2 (zh)
KR (1) KR102232926B1 (zh)
CN (1) CN109038736B (zh)
WO (1) WO2020029312A1 (zh)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109703399B (zh) * 2018-12-27 2021-05-18 台达电子企业管理（上海）有限公司 车载充放电系统及其所适用的控制方法
CN110228378B (zh) * 2019-05-30 2020-11-10 西安交通大学 一种用于电动汽车无线充电的双侧多环控制方法
CN110774909A (zh) * 2019-09-23 2020-02-11 华为技术有限公司 一种obc电路、obc充电器、新能源汽车及充电桩
WO2021166233A1 (ja) * 2020-02-21 2021-08-26 住友電気工業株式会社 電力変換装置、それを含む車両及び制御方法
CN111446864B (zh) * 2020-04-24 2024-06-18 深圳威迈斯新能源股份有限公司 一种多相dc/dc并联控制方法及其控制电路
CN111376760A (zh) * 2020-05-06 2020-07-07 深圳威迈斯新能源股份有限公司 可反向预充电的三端口车载充电机
CN111463878B (zh) * 2020-05-14 2021-10-01 深圳威迈斯新能源股份有限公司 一种兼容型大功率双端输出车载充电机及其控制方法
CN111464040B (zh) * 2020-05-14 2023-07-18 深圳威迈斯新能源股份有限公司 一种适用于不同输入电网的dcdc架构及其控制方法
CN111769743A (zh) * 2020-07-02 2020-10-13 深圳盛世新能源科技有限公司 一种一个变压器控制的双路充电电路及其控制方法
US11594973B2 (en) * 2020-08-04 2023-02-28 Delta Electronics Inc. Multiple-port bidirectional converter and control method thereof
CN112202342B (zh) * 2020-11-03 2021-06-25 深圳威迈斯新能源股份有限公司 双向谐振变换器磁平衡电路及其控制方法
CN114337289A (zh) * 2020-11-30 2022-04-12 华为数字能源技术有限公司 一种转换电路、转换器和电子设备
WO2022123653A1 (ja) * 2020-12-08 2022-06-16 三菱電機株式会社 電力変換ユニット及び電力変換装置
US11575327B2 (en) * 2021-02-09 2023-02-07 Aes Global Holdings Pte Ltd. Apparatus and method for synchronous rectifier control delay
CN113511084B (zh) * 2021-04-25 2023-06-09 深圳威迈斯新能源股份有限公司 一种输出端可进行串并联切换的车载充电机
CN113517751B (zh) * 2021-05-11 2024-05-07 深圳威迈斯新能源股份有限公司 充电电路及充电电路的调频调相控制方法
WO2024106323A1 (ja) * 2022-11-16 2024-05-23 株式会社アイシン 電源装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104184329A (zh) * 2013-05-21 2014-12-03 丰田自动车株式会社 电力转换设备以及电力转换方法
CN108237943A (zh) * 2018-01-17 2018-07-03 深圳威迈斯电源有限公司 一种双输出端口充电电路及其控制方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1021747A (en) * 1911-03-10 1912-03-26 Frank Wesley Bull Operating mechanism for tracker-bars.
EP1014550A3 (en) * 1998-12-18 2000-10-25 FORFAS, (trading as PEI Technologies) An AC/DC converter
US7400061B2 (en) * 2004-12-07 2008-07-15 Lockheed Martin Corporation Soft switched secondary side post regulator for DC to DC converter
TWI313102B (en) * 2005-02-21 2009-08-01 Delta Electronics Inc Llc series resonant converter and the driving method of the synchronous rectifier power switches thereof
JP2009044889A (ja) * 2007-08-09 2009-02-26 Toyota Motor Corp Ｄｃ−ｄｃコンバータ装置
US8587963B2 (en) * 2009-01-21 2013-11-19 Fsp Technology Inc. Resonant converter equipped with multiple output circuits to provide multiple power outlets
US8811039B2 (en) * 2010-07-16 2014-08-19 Virginia Tech Intellectual Properties, Inc. Pulse width modulated resonant power conversion
JP5838859B2 (ja) * 2012-02-29 2016-01-06 株式会社豊田自動織機 双方向電力変換装置
US10707775B2 (en) * 2013-08-14 2020-07-07 Enphase Energy, Inc. Method and apparatus for multi phase shift power converter control
US9252672B2 (en) * 2013-10-04 2016-02-02 Chicony Power Technology Co., Ltd. Method of controlling phase-shift full-bridge converter in light load operation
WO2015192133A2 (en) * 2014-06-13 2015-12-17 University Of Maryland An integrated dual-output grid-to-vehicle (g2v) and vehicle-to-grid (v2g) onboard charger for plug-in electric vehicles
WO2016017170A1 (ja) * 2014-07-30 2016-02-04 パナソニックＩｐマネジメント株式会社 Ｄｃ－ｄｃコンバータ
CN105763066B (zh) * 2016-05-19 2018-07-27 山东大学 基于三端口全桥dc/dc变换器的零功率电流控制系统及方法
US9954453B1 (en) * 2017-06-27 2018-04-24 Tdk Corporation Switching power supply device and switching control circuit
CN115241945A (zh) * 2017-09-30 2022-10-25 深圳威迈斯新能源股份有限公司 一种带逆变功能的三端口充电机

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104184329A (zh) * 2013-05-21 2014-12-03 丰田自动车株式会社 电力转换设备以及电力转换方法
CN108237943A (zh) * 2018-01-17 2018-07-03 深圳威迈斯电源有限公司 一种双输出端口充电电路及其控制方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
移相措施在电力系统紧急控制中的应用;张仲驰;《中国优秀硕士学位论文全文数据库》;20170731(第7期);第1-59页 *

Also Published As

Publication number Publication date
JP6816901B2 (ja) 2021-01-20
EP3609065A1 (en) 2020-02-12
JP2020028216A (ja) 2020-02-20
EP3609065B1 (en) 2022-03-23
WO2020029312A1 (zh) 2020-02-13
CN109038736A (zh) 2018-12-18
KR102232926B1 (ko) 2021-03-26
US10651669B2 (en) 2020-05-12
US20200052498A1 (en) 2020-02-13
KR20200018244A (ko) 2020-02-19

Similar Documents

Publication Publication Date Title
CN109038736B (zh) 一种充电电路移相控制方法
CN108237943B (zh) 一种双输出端口充电电路及其控制方法
EP3226377A1 (en) System architecture for battery charger based on gan-based power devices
CN109742968A (zh) 二极管箝位混合三电平双有源全桥变流器及其控制方法
CN108667036A (zh) 一种电动汽车v2g变换器控制方法
CN109361318A (zh) 基于dab的单级隔离型pfc变换器直接电流控制系统及控制方法
CN104375039B (zh) 一种隔离型直流变压器测试系统
CN207518331U (zh) 一种基于半桥llc谐振变换器的车载充电器
CN110557027B (zh) 一种应用于感应电能传输系统最大效率跟踪dc-dc变换器及其控制方法
CN109347343A (zh) 一种可实现多分布式储能的多端口储能变流器及方法
CN110768550A (zh) 一种v2g双向功率变换器、控制系统及控制方法
CN106655777A (zh) 一种开关电源输出电缆压降补偿电路及补偿方法
CN106685039A (zh) 一种充放电装置及其控制方法
CN109687735A (zh) 一种高精度宽范围的隔离型直流电源
CN110492769A (zh) 带功率因数校正功能的单级ac-dc变换器电路
CN107404155A (zh) 一种无线能量传输装置
CN106208268B (zh) 基于变初级参数的恒流恒压感应式无线充电系统
CN105305853A (zh) 采用有源功率因数校正技术的多脉波整流器及其设计方法
CN103560679B (zh) 脉宽调制型大功率交流稳压装置
CN106685217A (zh) 一种正负电源输出控制装置及方法
CN110212778A (zh) 一种非接触单管谐振变换器
CN212909357U (zh) 一种级联式直流电源恒流输出电路
CN107222006A (zh) 一种无线充电系统输出能量控制电路及控制方法
CN204906219U (zh) 一种电子束加工设备精密加速电源装置
CN110707940A (zh) 一种基于移相全桥软开关的改进型swiss整流器

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: 518000, 5 floor, Fengyun mansion, five road north, Nanshan District science and Technology Park, Shenzhen, Guangdong

Applicant after: Shenzhen Vmax Power Co.,Ltd.

Address before: 518000, 5 floor, Fengyun mansion, five road north, Nanshan District science and Technology Park, Shenzhen, Guangdong

Applicant before: Shenzhen Vmax Power Co.,Ltd.

GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address

Address after: 518000, 5 floor, Fengyun mansion, five road north, Nanshan District science and Technology Park, Shenzhen, Guangdong

Patentee after: Shenzhen Weimeisi New Energy (Group) Co.,Ltd.

Country or region after: China

Address before: 518000, 5 floor, Fengyun mansion, five road north, Nanshan District science and Technology Park, Shenzhen, Guangdong

Patentee before: Shenzhen Vmax Power Co.,Ltd.

Country or region before: China

EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20181218

Assignee: Wuhu Weimeisi New Energy Co.,Ltd.

Assignor: Shenzhen Weimeisi New Energy (Group) Co.,Ltd.

Contract record no.: X2024980008184

Denomination of invention: A Phase Shift Control Method for Charging Circuits

Granted publication date: 20191018

License type: Common License

Record date: 20240626

Application publication date: 20181218

Assignee: Shanghai Weimeisi new energy Co.,Ltd.

Assignor: Shenzhen Weimeisi New Energy (Group) Co.,Ltd.

Contract record no.: X2024980008183

Denomination of invention: A Phase Shift Control Method for Charging Circuits

Granted publication date: 20191018

License type: Common License

Record date: 20240626