CN109474167A - 驱动电路及功率开关的驱动方法 - Google Patents

驱动电路及功率开关的驱动方法 Download PDF

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Publication number
CN109474167A
CN109474167A CN201710799910.4A CN201710799910A CN109474167A CN 109474167 A CN109474167 A CN 109474167A CN 201710799910 A CN201710799910 A CN 201710799910A CN 109474167 A CN109474167 A CN 109474167A
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China
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power switch
current
circuit
driving
electrically coupled
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邢雷钟
刘国颖
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Delta Electronics Inc
Delta Optoelectronics Inc
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Delta Optoelectronics Inc
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Priority to CN201710799910.4A priority Critical patent/CN109474167A/zh
Priority to US15/919,199 priority patent/US10224804B1/en
Priority to FIEP18170464.4T priority patent/FI3454465T3/fi
Priority to EP18170464.4A priority patent/EP3454465B1/en
Priority to DK18170464.4T priority patent/DK3454465T3/da
Publication of CN109474167A publication Critical patent/CN109474167A/zh
Pending legal-status Critical Current

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/08Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/084Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/08Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/08Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088Circuits 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/08Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088Circuits 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
    • H02M1/092Circuits 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 the control signals being transmitted optically
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/32Means for protecting converters other than automatic disconnection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/38Means for preventing simultaneous conduction of switches
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/219Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/538Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • H02M7/53873Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with digital control
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • H02M7/53875Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with analogue control of three-phase output
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/539Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
    • H02M7/5395Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/082Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
    • H03K17/0826Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in bipolar transistor switches
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/16Modifications for eliminating interference voltages or currents
    • H03K17/168Modifications for eliminating interference voltages or currents in composite switches
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/0048Circuits or arrangements for reducing losses
    • H02M1/0054Transistor switching losses
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electronic Switches (AREA)
  • Inverter Devices (AREA)
  • Control Of Multiple Motors (AREA)
  • Control Of Electric Motors In General (AREA)
  • Power Conversion In General (AREA)

Abstract

一种驱动电路包含功率开关驱动器以及多个限流电路。功率开关驱动器用以根据切换讯号输出驱动讯号。多个限流电路各自的输入端分别电耦接于功率开关驱动器的多个输出端中相应的一个输出端。多个限流电路各自的输出端彼此电耦接于功率开关的控制端。功率开关驱动器根据功率开关的负载状态选择性地通过多个输出端中相应的一个输出端输出驱动讯号,使得驱动讯号经由多个限流电路中的一个限流电路输出至功率开关的控制端。

Description

驱动电路及功率开关的驱动方法
技术领域
本揭示内容系关于一种驱动电路,且特别系关于一种功率开关的驱动电路。
背景技术
随着电力电子的技术发展,各类型的功率开关被应用在许多电源转换设备当中,例如三相逆变电路或三相整流电路等等。
在不同的负载状态下,现有的功率开关驱动电路驱动功率晶体的开关速度并不相同,无法兼顾切换效率并同时降低电磁干扰的影响。
发明内容
本揭示内容的一方案为一种驱动电路。驱动电路包含功率开关驱动器以及多个限流电路。功率开关驱动器用以根据切换讯号输出驱动讯号。多个限流电路各自的输入端分别电耦接于功率开关驱动器的多个输出端中相应的一个输出端。多个限流电路各自的输出端彼此电耦接于功率开关的控制端。功率开关驱动器根据功率开关的负载状态选择性地通过多个输出端中相应的一个输出端输出驱动讯号,使得驱动讯号经由多个限流电路中的一个限流电路输出至功率开关的控制端。
本揭示内容的另一方案为一种电源转换装置。电源转换装置包含多个功率开关、处理电路以及多个驱动电路。多个功率开关分别用以根据多个驱动讯号选择性地导通或关断,以进行多相交流电与直流电之间的电力转换。处理电路用以分别输出多个切换讯号。多个驱动电路分别电耦接于处理电路与多个功率开关中相应的一个功率开关之间,以分别根据切换讯号输出驱动讯号。驱动电路中的任一个包含功率开关驱动器以及多个限流电路。功率开关驱动器用以根据相应的切换讯号输出相应的驱动讯号。多个限流电路各自的一输入端分别电耦接于功率开关驱动器的多个输出端中相应的一个输出端,多个限流电路各自的输出端彼此电耦接于相应的功率开关的控制端。功率开关驱动器根据流经相应的功率开关的负载电流选择性地通过多个输出端中相应的一个输出端输出相应的驱动讯号,使得驱动讯号经由多个限流电路中的一个限流电路输出至功率开关的控制端。
本揭示内容的又一方案为一种功率开关的驱动方法。功率开关的驱动方法包含:通过负载侦测电路,侦测功率开关的负载状态并相应地输出负载侦测讯号;通过处理电路,根据负载侦测讯号判断负载档位,以根据负载档位选择性地通过多个限流电路中相应的一个限流电路输出驱动讯号至功率开关的控制端;以及根据驱动讯号选择性地导通或关断功率开关。
附图说明
图1为根据本揭示内容部分实施例所绘示的电源转换装置的示意图。
图2为根据本揭示内容部分实施例所绘示的驱动电路与相应的功率开关的操作示意图。
图3A与图3B为根据本揭示内容部分实施例所绘示的功率开关驱动器的示意图。
图4为根据本揭示内容部分实施例所绘示的驱动电路与相应的功率开关的操作示意图。
图5为根据本揭示内容其他部分实施例所绘示的驱动电路与相应的功率开关的操作示意图。
图6为根据本揭示内容部分实施例所绘示的功率开关的驱动方法的流程图。
具体实施方式
下文系举实施例配合所附附图作详细说明,以更好地理解本揭示内容的方案,但所提供的实施例并非用以限制本揭露所涵盖的范围,而结构操作的描述非用以限制其执行的顺序,任何由元件重新组合的结构,所产生具有均等功效的装置,皆为本揭露所涵盖的范围。此外,根据业界的标准及惯常做法,附图仅以辅助说明为目的,并未依照原尺寸作图,实际上各种特征的尺寸可任意地增加或减少以便于说明。下述说明中相同元件将以相同的符号标示来进行说明以便于理解。
在全篇说明书与申请专利范围所使用的用词(terms),除有特别注明外,通常具有每个用词使用在此领域中、在此揭露的内容中与特殊内容中的平常意义。某些用以描述本揭露的用词将于下或在此说明书的别处讨论,以提供本领域技术人员在有关本揭露的描述上额外的引导。
此外,在本文中所使用的用词『包含』、『包括』、『具有』、『含有』等等,均为开放性的用语,即意指『包含但不限于』。此外,本文中所使用的『和/或』,包含相关列举项目中的一个或多个项目的任意一个以及其所有组合。
于本文中,当一元件被称为『连接』或『耦接』时,可指『电连接』或『电耦接』。『连接』或『耦接』亦可用以表示两个或多个元件间相互搭配操作或互动。此外,虽然本文中使用『第一』、『第二』、…等用语描述不同元件,该用语仅是用以区别以相同技术用语描述的元件或操作。除非上下文清楚指明,否则该用语并非特别指称或暗示次序或顺位,亦非用以限定本发明。
请参考图1。图1为根据本揭示内容部分实施例所绘示的电源转换装置100的示意图。如图1所示,在部分实施例中,电源转换装置100包含多个功率开关SWa~SWf、处理电路140、多个驱动电路Da~Df以及多个负载侦测电路160a~160c。电源转换装置100通过选择性地切换功率开关SWa~SWf中的至少一个,实现多相交流电与直流电之间的电力转换。举例来说,电源转换装置100可将直流电压Vdc转换为三相交流电压Va、Vb、Vc,以对三相负载900供电。
如图1所示,功率开关SWa~SWf分别用以根据多个驱动讯号DS选择性地导通或关断,以进行多相交流电与直流电之间的电力转换。举例来说,功率开关SWa~SWf可由金属氧化物半导体场效晶体管(MOSFET)、双极性晶体管(BJT)或绝缘栅双极晶体管(IGBT)等各种器件实现。
在本实施例中,在结构上,功率开关SWa的第一端电耦接于电源转换装置100的直流侧的正极端112,功率开关SWa的第二端电耦接于电源转换装置100的交流侧的第一端132。功率开关SWb的第一端电耦接于电源转换装置100的交流侧的第一端132,功率开关SWb的第二端电耦接于电源转换装置100的直流侧的负极端114(即:接地端Vee)。
功率开关SWc的第一端电耦接于电源转换装置100的直流侧的正极端112,功率开关SWc的第二端电耦接于电源转换装置100的交流侧的第二端134。功率开关SWd的第一端电耦接于电源转换装置100的交流侧的第二端134,功率开关SWd的第二端电耦接于电源转换装置100的直流侧的负极端114。
功率开关SWe的第一端电耦接于电源转换装置100的直流侧的正极端112,功率开关SWe的第二端电耦接于电源转换装置100的交流侧的第三端136。功率开关SWf的第一端电耦接于电源转换装置100的交流侧的第三端136,功率开关SWf的第二端电耦接于电源转换装置100的直流侧的负极端114。
如此一来,功率开关SWa~SWf便可形成三相桥式逆变电路,其中功率开关SWa、SWb分别作为A相的上臂开关与下臂开关,功率开关SWc、SWd分别作为B相的上臂开关与下臂开关,功率开关SWe、SWf分别作为C相的上臂开关与下臂开关。藉此,通过脉冲宽度调变方式选择性地导通同相桥臂中的上臂开关与下臂开关中的一个,便可分别将直流电压Vdc转换为三相交流电压Va、Vb、Vc。
具体来说,在本实施例中,处理电路140用以分别输出多个切换讯号PWM至相应的驱动电路Da~Df。切换讯号PWM可为脉冲宽度调变讯号。在各个实施例中,处理电路140可由中央处理单元(CPU)、微控制器(Microcontroller Unit,MCU)、复杂型可编程逻辑设备(Complex Programmable Logic Device,CPLD)、现场可编程门阵列(Field-programmablegate array,FPGA)等各种方式实现。
在结构上,驱动电路Da~Df分别电耦接于处理电路140与功率开关SWa~SWf中相应的一个功率开关之间。驱动电路Da~Df用以分别根据相应的切换讯号PWM输出驱动讯号DS至相应的功率开关SWa~SWf,以分别控制功率开关SWa~SWf选择性地导通或关断。
在结构上,负载侦测电路160a、160b、160c分别电耦接于处理电路140,并分别设置于电源转换装置100的交流侧的A相、B相、C相的输出线路上。负载侦测电路160a、160b、160c可侦测相应的功率开关SWa~SWf的负载状态,判断A相、B相、C相处于轻载或是重载状态,并输出相应的负载侦测讯号CDa、CDb、CDc至处理电路140。
举例来说,在部分实施例中,负载侦测电路160a、160b、160c可用以侦侧流经相应的功率开关SWa~SWf的负载电流Ia、Ib、Ic,如图1粗黑箭头示意,并依据多个电流侦测讯号输出相应的多个负载侦测讯号CDa、CDb、CDc至处理电路140。此外,在其他部分实施例中,负载侦测电路160a、160b、160c亦可用以侦测A相、B相、C相的输出交流电压Va、Vb、Vc,并依据多个电压侦测讯号输出相应的多个负载侦测讯号CDa、CDb、CDc至处理电路140。在不同实施例中,负载侦测电路160a、160b、160c可由各种电压和/或电流感测元件实现。
藉此,处理电路140便可根据负载侦测讯号CDa、CDb、CDc分别控制相应的驱动电路Da~Df的操作。以下段落中,将搭配相关附图针对驱动电路Da~Df的具体电路及详细操作提供进一步的说明。
请一并参考图2。图2为根据本揭示内容部分实施例所绘示的驱动电路Db与相应的功率开关SWb的操作示意图。为便于说明起见,图2所绘示的驱动电路Db与相应的功率开关SWb的操作乃是搭配图1中的电源转换装置100进行说明的。于图2中,与图1的实施例有关的相似元件系以相同的参考标号表示以便于理解。值得注意的是,在图2中系以其中一个驱动电路Db与其相应的功率开关SWb为例进行说明,本领域技术人员当可明白图1绘示的其他的驱动电路Da,Dc~Df与相应的功率开关SWa,SWc~SWf等均具有相似的结构与操作,故不再赘述。
如图2所示,在部分实施例中,驱动电路Db包含功率开关驱动器120以及多个限流电路180a~180d。处理电路140输出切换讯号PWM以及档位选择讯号(Slew-Rate Control,压摆率控制讯号)SRC至驱动电路Db中的功率开关驱动器120。
在结构上,功率开关驱动器120电耦接至处理电路140,并自处理电路140接收切换讯号PWM以及档位选择讯号SRC。藉此,功率开关驱动器120便可根据相应的切换讯号PWM输出相应的驱动讯号DS。
限流电路180a~180d各自的输入端分别电耦接于功率开关驱动器120的多个输出端中相应的一个输出端。限流电路180a~180d各自的输出端彼此电耦接于相应的功率开关SWb的控制端。
如此一来,功率开关驱动器120便可根据功率开关SWb的负载状态选择性地通过多个输出端中相应的一个输出端输出相应的驱动讯号DS,亦即,使得驱动讯号DS经由限流电路180a~180d中的其中一个限流电路输出至功率开关SWb的控制端。
具体来说,处理电路140自负载侦测电路160a接收到负载侦测讯号CDa后,便可判断功率开关SWb的负载状态,并根据不同的负载状态输出相应的档位选择讯号SRC。藉此,功率开关驱动器120便可根据档位选择讯号SRC选择性地通过相应的输出端输出驱动讯号DS,使得驱动讯号DS经由限流电路180a~180d中的其中一个限流电路传输至功率开关SWb。
请参考图3A与图3B。图3A与图3B为根据本揭示内容部分实施例所绘示的功率开关驱动器120的示意图。如图3A和图3B所示,在部分实施例中,功率开关驱动器120包含放大电路122以及切换电路124。
放大电路122用以放大切换讯号PWM以产生驱动讯号DS。如图中所示,在部分实施例中,放大电路122包含晶体管Q1与晶体管Q2。在结构上,晶体管Q1的第一端电耦接至电压源Vcc,晶体管Q1的第二端电耦接至放大电路122的输出端No,晶体管Q1的控制端用以接收切换讯号PWM。晶体管Q2的第一端电耦接至放大电路122的输出端No,晶体管Q2的第二端电耦接至接地端Vee,晶体管Q2的控制端用以接收切换讯号PWM。
举例来说,晶体管Q1与晶体管Q2可由不同型的半导体元件实现。举例来说,晶体管Q1可为N型半导体开关元件,晶体管Q2可为P型半导体开关元件。如此一来,当切换讯号PWM具有致能位准(如:高准位)时,晶体管Q1导通,晶体管Q2关断,放大电路122的输出端No的电压位准便会相应于电压源Vcc处于高准位。另一方面,当切换讯号PWM具有禁能位准(如:低准位)时,晶体管Q1关断,晶体管Q2导通,放大电路122的输出端No的电压位准便会相应于接地端Vee处于低准位。藉此,放大电路122便可藉由晶体管Q1与晶体管Q2放大切换讯号PWM,以产生电压位准较高的驱动讯号DS驱动功率开关SWb,达到以小讯号驱动大讯号回路的效果。
切换电路124电耦接于放大电路122的输出端No,并用以根据档位选择讯号SRC选择性地耦接放大电路122的输出端No至功率开关驱动器120的多个输出端N1、N2、N3、N4中相应的一个输出端,以提供驱动讯号DS至相应的限流电路180a~180d,请配合参考图2。
举例来说,在部分实施例中,限流电路180a的导通阻值大于限流电路180b的导通阻值。当流经功率开关SWb的负载电流Ia小于第一门坎值时,切换电路124可根据相应的档位选择讯号SRC选择性地耦接放大电路122的输出端No至功率开关驱动器120的输出端N1,使得功率开关驱动器120通过输出端N1~N4中相应于限流电路180a的输出端N1输出驱动讯号DS,如图3A所示。
另一方面,当负载电流Ia大于第一门坎值时,切换电路124可根据相应的档位选择讯号SRC选择性地耦接放大电路122的输出端No至功率开关驱动器120的输出端N2,使得功率开关驱动器120通过输出端N1~N4中相应于限流电路180b的输出端N2输出驱动讯号DS,如图3B所示,并可依此类推其他档位切换的控制,其细节不再于此赘述。
换言之,在本揭示内容中处理电路140可根据负载侦测讯号CDa~CDc取得功率开关SWa~SWf相应的电压信息或电流信息,以判断目前电源转换装置100操作在多个负载档位(如重载、中载、轻载、空载)。藉此,处理电路140便可输出代表负载档位的档位选择讯号SRC至切换电路124,相应切换限流电路180a~180d中的一个,以调整导通阻值与关断阻值的大小。如此一来,便可调整驱动电路Da~Df输出的驱动电流,以在不同的负载状态下藉由不同的驱动电流进行驱动,进而实现动态调整功率开关SWa~SWf切换时的电压变化率(Slew Rate)与切换损失(Switching Loss),提高系统效能。
举例来说,当系统处于重载时,可经由导通阻值较小的限流电路如180a或180b输出驱动讯号DS,以较高的驱动电流进行驱动。另一方面,当系统处于轻载时,可经由导通阻值较大的限流电路如180c或180d输出驱动讯号DS,以较低的驱动电流进行驱动。藉此,便可在各种负载状态下,维持电压变化率介于目标操作区间内,藉此控制开关导通或关断的时间,藉此降低切换损失,并兼顾避免电压变化率过高导致不必要的电磁干扰的需求。
此外,在部分其他实施例中,功率开关驱动器120亦可采用隔离式驱动器架构,于输入端与放大电路122之间进一步设置光隔离式(Photo Coupler,光耦合器)、磁隔离式或电容隔离式等的隔离电路,以隔离功率开关驱动器120输入端的低压侧以及输出端的高压侧,以符合设备的安规需求。
请参考图4。图4为根据本揭示内容部分实施例所绘示的驱动电路Db与相应的功率开关SWb的操作示意图。于图4中,与图2的实施例有关的相似元件系以相同的参考标号表示以便于理解。
如图4所示,驱动电路Db中的多个限流电路180a~180d分别包含导通电阻单元Ron1~Ron4、二极管单元D1~D4以及截止电阻单元Roff1~Roff4。在结构上,导通电阻单元Ron1~Ron4分别电耦接于相应的限流电路180a~180d的第一端与第二端之间,于第一支路上形成驱动讯号DS导通功率开关SWb时提供驱动电流的电流路径。
另一方面,截止电阻单元Roff1~Roff4分别与二极管单元D1~D4彼此串联,电耦接于限流电路180a~180d的第一端与第二端之间,于第二支路上形成驱动讯号DS关断功率开关SWb时提供驱动电流的电流路径。
藉此,通过以相异阻值的元件实现导通电阻单元Ron1~Ron4、截止电阻单元Roff1~Roff4,便可分别设定限流电路180a~180d的导通阻值与关断阻值,进而调整驱动电流的大小。此外,在其他部分实施例中,限流电路180a~180b可进一步包含相应的电感元件以调整驱动电流,图4中所绘示的限流电路180a~180d仅为本揭示内容可能的实施方式之一,并非用以限定本揭示内容。此外,上述导通电阻单元Ron1~Ron4及截止电阻单元Roff1~Roff4等可为磁珠设计的限流元件。
此外,虽然在图2~图4所绘示的实施例中,驱动电路Db包含四组限流电路180a~180d,分别对应四组不同的负载电流准位,但本揭示内容并不以此为限。请参考图5。图5为根据本揭示内容其他部分实施例所绘示的驱动电路Db与相应的功率开关SWb的操作示意图。
如图5所示,在部分实施例中,驱动电路Db亦可仅包含两组限流电路180a、180b,分别对应两组不同的负载电流准位,以根据不同的档位选择讯号SRC进行切换,并以限流电路180a、180b中的其中一个限流电路做为输出路径输出驱动讯号DS,据此调整驱动电流的大小。
换言之,本领域技术人员可根据电路实际需求调整配置限流电路的数量、负载档位的数量,以及相应的门坎值大小,本揭示内容附图中所示的电路仅为本揭示内容可能的实施方式之一,并非用以限制本揭示内容。
请参考图6。图6为根据本揭示内容部分实施例所绘示的功率开关的驱动方法600的流程图。为方便及清楚说明起见,下述功率开关的驱动方法600是配合图1~图5所示实施例进行说明,但不以此为限,任何熟习此技艺者,在不脱离本揭示内容的精神和范围内,当可对作各种更动与润饰。如图6所示,驱动方法600包含步骤S610、S620、S630、S640以及步骤S650。
首先,在步骤S610中,电源转换装置100通过负载侦测电路160a、160b、160c,侦测功率开关SWa~SWf的负载状态并相应地输出负载侦测讯号CDa、CDb、CDc。
接着,在步骤S620中,电源转换装置100通过处理电路140输出切换讯号PWM。
接着,在步骤S630中,电源转换装置100通过放大电路122,放大切换讯号PWM以产生驱动讯号DS。
接着,在步骤S640中,电源转换装置100通过处理电路140,根据负载侦测讯号CDa、CDb、CDc判断负载档位,以根据负载档位选择性地通过多个限流电路180a~180d中相应的一个限流电路输出驱动讯号DS至功率开关SWa~SWf的控制端。
具体来说,在部分实施例中,步骤S640进一步包含步骤S642以及步骤S644。
在步骤S642中,电源转换装置100通过处理电路140,根据负载侦测讯号CDa、CDb、CDc输出相应的档位选择讯号SRC。
在步骤S644中,电源转换装置100通过切换电路124,根据档位选择讯号SRC选择性地通过限流电路180a~180d中相应的一个限流电路输出驱动讯号DS。
在部分实施例中,当处理电路140判断流经功率开关SWa~SWf的负载电流Ia~Ic小于第一门坎值时,电源转换装置100通过限流电路180a~180d中的第一限流电路180a输出驱动讯号DS。当处理电路140判断负载电流Ia~Ic大于第一门坎值时,电源转换装置100可通过限流电路180a~180d中的第二限流电路180b输出驱动讯号DS,其中第一限流电路180a的导通阻值大于第二限流电路180b的导通阻值。
相似地,当处理电路140进一步判断负载电流Ia~Ic大于第二门坎值时,电源转换装置100可通过限流电路180a~180d中的第三限流电路180c输出驱动讯号DS,当处理电路140进一步判断负载电流Ia~Ic大于第三门坎值时,电源转换装置100可通过限流电路180a~180d中的第四限流电路180d输出驱动讯号DS。第二门坎值大于第一门坎值,第三门坎值大于第二门坎值。第二限流电路180b的导通阻值大于第三限流电路180c的导通阻值,第三限流电路180c的导通阻值大于第四限流电路180d的导通阻值。
最后,在步骤S650中,电源转换装置100根据相应的驱动讯号DS选择性地导通或关断功率开关SWa~SWf。
所属技术领域具有通常知识者可直接了解此功率开关的驱动方法600如何基于上述多个不同实施例中的电源转换装置100以执行该等操作及功能,故不再此赘述。
于上述的内容中,包含示例性的步骤。然而此些步骤并不必需依序执行。在本实施方式中所提及的步骤,除特别叙明其顺序者外,均可依实际需要调整其前后顺序,甚至可同时或部分同时执行。
此外,上述各实施例中的各个元件可以由各种类型的数字或模拟电路实现,亦可分别由不同的集成电路芯片实现。各个元件亦可整合至单一的控制芯片。各个控制电路亦可由各种处理器或其他集成电路芯片实现。上述仅为例示,本揭示内容并不以此为限。
综上所述,在本揭示内容的各个实施例中,利用回授负载的电流或电压讯号得知负载电流信息或电压信息,并依据设定的一个或多个门坎值选择操作在不同的输出档位,以切换驱动讯号的输出路径,改变驱动电流的大小。藉此,便可调整功率开关切换的电压变化率,并控制切换损失。
如此一来,便可在不同负载输出时通过调整驱动电路的驱动能力,有效降低功率开关切换的电压变化率,降低电磁干扰。此外,亦可通过调整驱动电路的驱动能力,改善功率开关的切换损失,降低功率开关切换损耗,提升系统整体能源使用效率。
虽然本揭示内容已以实施例方式揭露如上,然其并非用以限定本揭示内容,任何熟习此技艺者,在不脱离本揭示内容的精神和范围内,当可作各种更动与润饰,因此本揭示内容的保护范围当视随附的申请专利范围所界定者为准。
符号说明
100 电源转换装置
112 正极端
114 负极端
120 功率开关驱动器
122 放大电路
124 切换电路
132 第一端
134 第二端
136 第三端
140 处理电路
160a~160c 负载侦测电路
180a~180d 限流电路
600 驱动方法
900 三相负载
Da~Df 驱动电路
SWa~SWf 功率开关
Q1、Q2 晶体管
D1~D4 二极管单元
Ron1~Ron4 导通电阻单元
Roff1~Roff4 截止电阻单元
Vcc 电压源
Vee 接地端
No、N1~N4 输出端
CDa~CDc 负载侦测讯号
PWM 切换讯号
DS 驱动讯号
SRC 档位选择讯号
Va、Vb、Vc 三相交流电压
Ia、Ib、Ic 负载电流
S610、S620、S630、S640、S642、S644、S650 步骤

Claims (20)

1.一种驱动电路,包含:
一功率开关驱动器,用以根据一切换讯号输出一驱动讯号;以及
多个限流电路,所述多个限流电路各自的一输入端分别电耦接于该功率开关驱动器的多个输出端中相应的一个输出端,所述多个限流电路各自的一输出端彼此电耦接于一功率开关的一控制端;
其中该功率开关驱动器根据该功率开关的一负载状态选择性地通过所述多个输出端中相应的一个输出端输出该驱动讯号,使得该驱动讯号经由所述多个限流电路中的一个限流电路输出至该功率开关的该控制端。
2.根据权利要求1所述的驱动电路,其中所述多个限流电路包含一第一限流电路以及一第二限流电路,且该第一限流电路的一导通阻值大于该第二限流电路的一导通阻值;
当流经该功率开关的一负载电流小于一第一门坎值时,该功率开关驱动器通过所述多个输出端中相应于该第一限流电路的一个输出端输出该驱动讯号;以及
当该负载电流大于该第一门坎值时,该功率开关驱动器通过所述多个输出端中相应于该第二限流电路的一个输出端输出该驱动讯号。
3.根据权利要求1所述的驱动电路,其中该功率开关驱动器还用以自一处理电路接收该切换讯号。
4.根据权利要求3所述的驱动电路,其中该处理电路还用以输出一档位选择讯号至该功率开关驱动器,使得该功率开关驱动器根据该档位选择讯号选择性地通过所述多个输出端中相应的一个输出端输出该驱动讯号。
5.根据权利要求4所述的驱动电路,其中该处理电路还用以自一负载侦测电路接收一负载侦测讯号,并根据该负载侦测讯号输出该档位选择讯号,该负载侦测电路用以侦测该功率开关的该负载状态以输出该负载侦测讯号。
6.根据权利要求4所述的驱动电路,其中该功率开关驱动器包含:
一放大电路,用以放大该切换讯号以产生该驱动讯号;以及
一切换电路,用以根据该档位选择讯号选择性地耦接该放大电路的一输出端至该功率开关驱动器的所述多个输出端中相应的一个输出端,以提供该驱动讯号至相应的限流电路。
7.根据权利要求6所述的驱动电路,其中该放大电路包含:
一第一晶体管,该第一晶体管的一第一端电耦接至一第一电压源,该第一晶体管的一第二端电耦接至该放大电路的该输出端,该第一晶体管的一控制端用以接收该切换讯号;以及
一第二晶体管,该第二晶体管的一第一端电耦接至该放大电路的该输出端,该第二晶体管的一第二端电耦接至一接地端,该第二晶体管的一控制端用以接收该切换讯号。
8.根据权利要求1所述的驱动电路,其中所述多个限流电路中的任一个限流电路包含:
一导通电阻单元,电耦接于该限流电路的一第一端与一第二端之间;
一二极管单元;以及
一截止电阻单元,其中该截止电阻单元与该二极管单元彼此串联,且电耦接于该限流电路的该第一端与该第二端之间。
9.一种电源转换装置,包含:
多个功率开关,所述多个功率开关分别用以根据多个驱动讯号选择性地导通或关断,以进行多相交流电与直流电之间的电力转换;
一处理电路,用以分别输出多个切换讯号;以及
多个驱动电路,所述多个驱动电路分别电耦接于该处理电路与所述多个功率开关中相应的一个功率开关之间,以分别根据所述多个切换讯号输出所述多个驱动讯号,其中所述多个驱动电路中的任一个驱动电路包含:
一功率开关驱动器,用以根据相应的切换讯号输出相应的驱动讯号;以及
多个限流电路,所述多个限流电路各自的一输入端分别电耦接于该功率开关驱动器的多个输出端中相应的一个输出端,所述多个限流电路各自的一输出端彼此电耦接于相应的功率开关的一控制端;
其中该功率开关驱动器根据流经相应的功率开关的一负载电流选择性地通过所述多个输出端中相应的一个输出端输出相应的驱动讯号,使得该驱动讯号经由所述多个限流电路中的一个限流电路输出至该功率开关的该控制端。
10.根据权利要求9所述的电源转换装置,其中所述多个限流电路包含一第一限流电路以及一第二限流电路,且该第一限流电路的一导通阻值大于该第二限流电路的一导通阻值;
当该负载电流小于一第一门坎值时,该功率开关驱动器通过所述多个输出端中相应于该第一限流电路的一个输出端输出该驱动讯号;以及
当该负载电流大于该第一门坎值时,该功率开关驱动器通过所述多个输出端中相应于该第二限流电路的一个输出端输出该驱动讯号。
11.根据权利要求9所述的电源转换装置,其中该处理电路还用以输出一档位选择讯号至所述多个驱动电路中的该功率开关驱动器,使得所述多个驱动电路中的该功率开关驱动器根据该档位选择讯号选择性地通过所述多个输出端中相应的一个输出端输出该驱动讯号。
12.根据权利要求11所述的电源转换装置,还包含:
多个负载侦测电路,电耦接于该处理电路,所述多个负载侦测电路用以侦侧流经相应的功率开关的该负载电流,并输出相应的多个负载侦测讯号至该处理电路;以及
其中该处理电路还用以根据所述多个负载侦测讯号输出该档位选择讯号。
13.根据权利要求11所述的电源转换装置,其中该功率开关驱动器包含:
一放大电路,用以放大该切换讯号以产生该驱动讯号;以及
一切换电路,用以根据该档位选择讯号选择性地耦接该放大电路的一输出端至该功率开关驱动器的所述多个输出端中相应的一个输出端,以提供该驱动讯号至相应的限流电路。
14.根据权利要求13所述的电源转换装置,其中该放大电路包含:
一第一晶体管,该第一晶体管的一第一端电耦接至一第一电压源,该第一晶体管的一第二端电耦接至该放大电路的该输出端,该第一晶体管的一控制端用以接收该切换讯号;以及
一第二晶体管,该第二晶体管的一第一端电耦接至该放大电路的该输出端,该第二晶体管的一第二端电耦接至一接地端,该第二晶体管的一控制端用以接收该切换讯号。
15.根据权利要求9所述的电源转换装置,其中所述多个限流电路中的任一个限流电路包含:
一导通电阻单元,电耦接于该限流电路的一第一端与一第二端之间;
一二极管单元;以及
一截止电阻单元,其中该截止电阻单元与该二极管单元彼此串联,且电耦接于该限流电路的该第一端与该第二端之间。
16.根据权利要求9所述的电源转换装置,其中所述多个功率开关包含:
一第一功率开关,该第一功率开关的一第一端电耦接于该电源转换装置的一直流侧的一正极端,该第一功率开关的一第二端电耦接于该电源转换装置的一交流侧的一第一端;
一第二功率开关,该第二功率开关的一第一端电耦接于该电源转换装置的该交流侧的该第一端,该第二功率开关的一第二端电耦接于该电源转换装置的该直流侧的一负极端;
一第三功率开关,该第三功率开关的一第一端电耦接于该电源转换装置的该直流侧的该正极端,该第三功率开关的一第二端电耦接于该电源转换装置的该交流侧的一第二端;
一第四功率开关,该第四功率开关的一第一端电耦接于该电源转换装置的该交流侧的该第二端,该第四功率开关的一第二端电耦接于该电源转换装置的该直流侧的该负极端;
一第五功率开关,该第五功率开关的一第一端电耦接于该电源转换装置的该直流侧的该正极端,该第五功率开关的一第二端电耦接于该电源转换装置的该交流侧的一第三端;以及
一第六功率开关,该第六功率开关的一第一端电耦接于该电源转换装置的该交流侧的该第三端,该第六功率开关的一第二端电耦接于该电源转换装置的该直流侧的该负极端。
17.一种功率开关的驱动方法,包含:
通过一负载侦测电路,侦测一功率开关的一负载状态并相应地输出一负载侦测讯号;
通过一处理电路,根据该负载侦测讯号判断一负载档位,以根据该负载档位选择性地通过多个限流电路中相应的一个限流电路输出一驱动讯号至该功率开关的一控制端;以及
根据该驱动讯号选择性地导通或关断该功率开关。
18.根据权利要求17所述的功率开关的驱动方法,还包含:
当该处理电路判断流经该功率开关的一负载电流小于一第一门坎值时,通过所述多个限流电路中的一第一限流电路输出该驱动讯号;以及
当该处理电路判断该负载电流大于该第一门坎值时,通过所述多个限流电路中的一第二限流电路输出该驱动讯号,其中该第一限流电路的一导通阻值大于该第二限流电路的一导通阻值。
19.根据权利要求17所述的功率开关的驱动方法,还包含:
通过该处理电路,输出一切换讯号;以及
通过一放大电路,放大该切换讯号以产生该驱动讯号。
20.根据权利要求17所述的功率开关的驱动方法,还包含:
通过该处理电路,根据该负载侦测讯号输出相应的一档位选择讯号;以及
通过一切换电路,根据该档位选择讯号选择性地通过所述多个限流电路中相应的一个限流电路输出该驱动讯号。
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