| 摘要 |
PURPOSE:To provide a highly accurate method and device for controlling the phase of inverters which are suitable for digitization and less in output waveform distortion. CONSTITUTION:By the title controlling method the time interval for reading out the waveform pattern of an output voltage is controlled by selecting one out of a plurality of oscillating means f1-f3 having different frequencies in corresponding to a detected phase difference by providing a means 95 which calculates the voltage phase difference between an inverter 3 and AC power source 1, the means f1-f3, and a means 91 for storing the waveform pattern of the output voltage of the inverter 3. Since a digital means can be used, the characteristic of the phase controller is not affected by temperature conditions and secular changes. |
