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    • 68. 发明专利
    • Transformer-less inverter apparatus
    • 无变压器逆变器装置
    • JP2007300768A
    • 2007-11-15
    • JP2006128787
    • 2006-05-08
    • Meidensha Corp株式会社明電舎
    • OI KAZUNOBUONO MASAAKI
    • H02M7/523
    • PROBLEM TO BE SOLVED: To reduce burden of a filter capacitor removing noise, to prolong life of the filter capacitor, to miniaturize it, and to prevent influence of noise to a load. SOLUTION: An inverter 2 converts DC power from a DC power supply 1 into AC power, and it is supplied to the load 5 without transformer. The star-connected filter capacitors 4 are installed between the inverter 2 and the load 5. A neutral point of the filter capacitor 4 and an intermediate point of the DC power supply 1 are connected by a neutral wire 10. A first parallel LC resonance circuit 12 where a resonance frequency is a frequency of current distortion and is a tertiary harmonic of an output frequency of the inverter 2 is arranged in the neutral wire 10. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:为了减轻滤波电容器消除噪声的负担,延长滤波电容器的寿命,使其小型化,并防止噪声对负载的影响。 解决方案:逆变器2将来自直流电源1的直流电力转换为交流电力,并将其提供给没有变压器的负载5。 星形连接的滤波电容器4安装在逆变器2和负载5之间。滤波电容器4的中性点和直流电源1的中间点通过中性线10连接。第一并联LC谐振电路 12,其中谐振频率是电流失真的频率,并且是逆变器2的输出频率的三次谐波被布置在中性线10中。版权所有(C)2008,JPO&INPIT