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    • 67. 发明授权
    • Inverter device attenuating in-phase harmonic components of an
oscillating output signal
    • 变频器衰减振荡输出信号的同相谐波分量
    • US5422765A
    • 1995-06-06
    • US776858
    • 1991-10-16
    • Eiji KobayashiAkira Egawa
    • Eiji KobayashiAkira Egawa
    • H02M1/12H02M7/5387H03H7/09
    • H03H7/09H02M1/12H02M7/5387
    • An inverter device receives a D.C. power source as an input and performs a switching operation at a single frequency in response to a preset driving signal (Vg1, Vg2, Vg3, Vg4) to produce an A.C. voltage. A transmission transformer (CH) having two coils which have the same inductance and are magnetically closely coupled with each other is provided and the two coils (CH1, CH2) are connected with the same polarities to respective ones of one set of lines for transmitting the A.C. voltage. The impedance of the transmission transformer (CH) is so small that it is negligible with respect to a normal A.C. voltage of a positive phase mode. A harmonic voltage is in an in-phase mode and the transmission transformer (CH) exhibits an extremely high impedance with respect to the harmonic voltage, and thus prevents the creation of a current path. As a result, the waveform distortion of a voltage applied between the drain and source of MOS transistors (FET1, FET2, FET3, FET4) is reduced and the peak value is reduced.
    • 逆变器装置接收直流电源作为输入,并响应于预设的驱动信号(Vg1,Vg2,Vg3,Vg4)以单个频率执行切换操作,以产生交流电压。 提供了具有相同电感并且彼此磁耦合的两个线圈的变速器(CH),并且两个线圈(CH1,CH2)以相同的极性连接到一组线路中的相应的一组线路,用于发送 交流电压。 传输变压器(CH)的阻抗如此之小,相对于正相模式的正常交流电压可以忽略不计。 谐波电压处于同相模式,并且变压器(CH)相对于谐波电压具有极高的阻抗,因此防止了电流路径的产生。 结果,施加在MOS晶体管(FET1,FET2,FET3,FET4)的漏极和源极之间的电压的波形失真减小,峰值减小。