| 摘要 |
PURPOSE:To obtain a controller for controlling an AC electric vehicle stably without increasing the size even upon drop of stringing voltage. CONSTITUTION:A voltage detecting circuit 9 connected with the secondary winding 32 or the tertiary winding 33 of a main transformer 3 detects input voltage of a PWM converter 4 or the stringing voltage. A voltage control pattern generating circuit 13 delivers a control voltage command CC, corresponding to thus detected voltage value, to the PWM converter 4 thus making variable the control target value of DC output voltage. |
