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    • 4. 发明专利
    • Dc-ac converter
    • 直流交流转换器
    • JP2013021905A
    • 2013-01-31
    • JP2012106517
    • 2012-05-08
    • Taida Electronic Ind Co Ltd台達電子工業股▲ふん▼有限公司
    • GU ZHENWEILI LEI MINGKO KA
    • H02M7/48
    • H02M7/5388H02M7/48
    • PROBLEM TO BE SOLVED: To provide a DC-AC converter for coping with the problems of low conversion efficiency and high leakage current.SOLUTION: A DC-AC converter 41 including a switch circuit that converts DC power and outputs an AC voltage is disclosed. The switch circuit includes: a first switch branch 411 having a first switch element S1 and a second switch element S2; a second switch branch 412 having a third switch element S3, a fourth switch element S4, and a fifth switch element S5; and a sixth switch element S6 of which one end is connected between the third switch element and the fourth switch element, and the other end is connected between the first switch element and the second switch element. The first switch element, the second switch element, the third switch element, the fourth switch element, the fifth switch element, and the sixth switch element are turned on and off so as to improve the conversion efficiency of the DC-AC converter 41 and to prevent the occurrence of the leakage current in the DC-AC converter 41.
    • 要解决的问题:提供一种DC-AC转换器,用于解决低转换效率和高漏电流的问题。 公开了一种包括转换DC电源并输出AC电压的开关电路的DC-AC转换器41。 开关电路包括:具有第一开关元件S1和第二开关元件S2的第一开关支路411; 具有第三开关元件S3的第二开关分支412,第四开关元件S4和第五开关元件S5; 以及第六开关元件S6,其一端连接在第三开关元件和第四开关元件之间,另一端连接在第一开关元件和第二开关元件之间。 第一开关元件,第二开关元件,第三开关元件,第四开关元件,第五开关元件和第六开关元件导通和截止,以便提高DC-AC转换器41的转换效率和 以防止DC-AC转换器41中的漏电流的发生。版权所有:(C)2013,JPO&INPIT
    • 7. 发明专利
    • Power conversion apparatus
    • 功率转换装置
    • JP2010252450A
    • 2010-11-04
    • JP2009097069
    • 2009-04-13
    • Fuji Electric Systems Co Ltd富士電機システムズ株式会社
    • NEMOTO YUJIMINO KAZUAKIYAMADA RYUJI
    • H02M7/483H02M3/28H02M7/48H02M7/5387
    • H02M7/487H02M7/5388
    • PROBLEM TO BE SOLVED: To provide a power conversion apparatus capable of keeping an output voltage constant by gently varying a duty even in instantaneous voltage drop, and capable of reducing loss without need for increasing a breakdown voltage of a semiconductor device connected to the secondary side. SOLUTION: The power conversion apparatus includes: a first series circuit in which first and second capacitors are connected in series at a first junction point; a second series circuit in which first and second switching elements are connected in series at a second junction point; a third series circuit in which third and fourth switching elements are connected in series at a third junction point; and a DC voltage source with which these series circuits are connected in parallel and which supplies direct-current input voltage to these circuits. The power conversion apparatus takes out an AC output voltage generated between the second junction point and the third junction point. The power conversion apparatus further includes a switch that is placed between the first junction point and the second junction point and connects these junction points together. COPYRIGHT: (C)2011,JPO&INPIT
    • 解决的问题:提供一种功率转换装置,其能够即使在瞬时电压降中也轻轻地改变占空比而保持输出电压恒定,并且能够减小损耗而不需要增加连接到的半导体器件的击穿电压 二次侧。 解决方案:电力转换装置包括:第一串联电路,其中第一和第二电容器在第一连接点串联连接; 第二串联电路,其中第一和第二开关元件在第二连接点处串联连接; 第三串联电路,其中第三和第四开关元件在第三连接点串联连接; 以及这些串联电路并联连接并且向这些电路提供直流输入电压的直流电压源。 电力转换装置取出在第二连接点和第三连接点之间产生的AC输出电压。 电力转换装置还包括置于第一连接点和第二连接点之间并将这些连接点连接在一起的开关。 版权所有(C)2011,JPO&INPIT
    • 10. 发明专利
    • Mixed type dc/ac conversion system and control method therefor
    • 混合型直流/交流转换系统及其控制方法
    • JP2014039454A
    • 2014-02-27
    • JP2013000646
    • 2013-01-07
    • Taida Electronic Ind Co Ltd台達電子工業股▲ふん▼有限公司
    • GU ZHENWEILEE LEI-MINGKO KA
    • H02M7/48
    • H02M7/48H02M7/5388
    • PROBLEM TO BE SOLVED: To provide a mixed type DC/AC conversion system capable of improving the conversion efficiency of DC/AC conversion.SOLUTION: The mixed type DC/AC conversion system has: a first DC power supply 10 for supplying a first DC input voltage V; a second DC power supply 20 for supplying a second DC input voltage Vwhose voltage value is larger than that of the first DC input voltage V; a power converter 30 for connecting with the first DC power supply 10 and the second DC power supply 20 in parallel and converting the first DC input voltage Vor the second DC input voltage Vinto an AC output voltage V; and a comparison unit 60. The mixed type DC/AC conversion system outputs a control signal Scontrolling the power converter 30 so as to convert the first DC input voltage Vinto the AC output voltage Vwhen an absolute value of the AC output voltage Vis an external reference voltage Vor lower, and outputs the control signal Scontrolling the power converter 30 so as to convert the second DC input voltage Vinto the AC output voltage Vwhen the absolute value of the AC output voltage Vis the external reference voltage Vor larger.
    • 要解决的问题:提供能够提高DC / AC转换的转换效率的混合型DC / AC转换系统。解决方案:混合型DC / AC转换系统具有:第一直流电源10,用于提供第一DC 输入电压V; 用于提供第二DC输入电压Vwhose电压值的第二DC电源20大于第一DC输入电压V的电压值; 电源转换器30,用于并联连接第一直流电源10和第二直流电源20,并将第一直流输入电压VOR和第二直流输入电压Vin转换成交流输出电压V; 和比较单元60.混合型DC / AC转换系统输出控制功率转换器30的控制信号,以便将第一DC输入电压Vin转换为交流输出电压Vw,AC交流输出电压Vis的绝对值为外部参考值 电压Vor较低,并输出控制功率转换器30的控制信号,以便在交流输出电压的绝对值Vis与外部参考电压Vor较大时将第二直流输入电压Vin转换为交流输出电压Vw。