| 摘要 |
PURPOSE:To restrain beat, appearing in the output current of an inverter, by a method wherein the output of a flux regulating means is synchronized substantially with a modulated wave. CONSTITUTION:A synchronized signal is outputted from a flux command value generator 13 to a modulated wave generator 15, therefore, a flux commanding value is synchronized with a modulated wave. Therefore, the output of a flux regulator, inputting a deviation between the flux command value and the actual value of flux, is synchronized substantially with the modulated wave. According to this method, a time point, whereat the output of the flux regulator 14 passes zero point, becomes the same as a time point, whereat the modulated wave passes a zero point, whereby beat in the output current of a transistor inverter 3 may be restrained. |
