| 摘要 |
PURPOSE: To provide a controller which improves the distortion factor of the output voltage waveform of a PWM inverter and the transient ripple of output voltage. CONSTITUTION: A controller 20 is composed of a gain adjuster 21, a forecast type instantaneous value controller 22, etc., and the gain adjuster 21 amplifies the deviation between the instantaneous voltage command value led out of a preset voltage set value and the voltage value of the output of a fitter 3 to make sine waves into a desired value, and this inputs it into the forecast type instantaneous value control circuit 22, whereby the forecast type instantaneous value control circuit 22 forecasts and operates an instantaneous correction for PWM control including the error from the actual value of the circuit constant of the filter 3 to make sine waves and load 4 or ripple. |
