Method and apparatus for controlling a DC to AC inverter system by a
plurality of pulse-width modulated pulse trains
    1.
    发明授权
    Method and apparatus for controlling a DC to AC inverter system by a plurality of pulse-width modulated pulse trains 失效
    通过多个脉冲宽度调制的脉冲串来控制DC到AC逆变器系统的方法和装置

    公开(公告)号:US5625539A

    公开(公告)日:1997-04-29

    申请号:US438551

    申请日:1995-05-10

    IPC分类号: H02M7/48 H02M3/335

    CPC分类号: H02M7/4807

    摘要: A pulse train pulse-width modulated by PWM control using a sine-wave signal and a carrier signal is inverted alternately in positive-negative polarity. With a high-frequency AC signal obtained by the inversion, a primary side of a transformer for insulating input and output from each other is excited. This arrangement makes it possible to employ a high-frequency transformer which has a capacity ratio of about 1/30 and a weight ratio of about 1/20 relative to a commercial-frequency transformer, instead of using it. Thus, an inverter apparatus can be reduced in size and weight as compared with the system using the power-frequency transformer. A sine-wave AC waveform with substantially less distortion similar to the waveform output by the conventional PWM control can be obtained with a simple construction.

    摘要翻译: 通过使用正弦波信号和载波信号的PWM控制调制的脉冲串脉冲串以正负极性交替地反转。 利用通过反相获得的高频AC信号,激励用于彼此绝缘输入和输出的变压器的初级侧。 这种布置使得可以使用具有大约+ E,fra 1/30 + EE的容量比和大约+ E,fra 1/20 + EE的相对于商用频率变压器的重量比的高频变压器 ,而不是使用它。 因此,与使用电力 - 频率变换器的系统相比,逆变器装置的尺寸和重量可以减小。 通过简单的结构可以获得具有类似于常规PWM控制输出的波形的正常波形的正弦波交流波形。