| 摘要 |
PURPOSE:To enhance the output frequency of an inverter by displacing 180 deg. of an electric angle of the carrier for PWM controlling a pair of switching elements connected in series to the carrier for PWM controlling a pair of switching elements connected in series. CONSTITUTION:A compensating current detected value is compared by a comparator C1 with the instruction value, and a deviation is inputted to a control compensator H(S) to obtain a control input signal. This control input signal is inputted to comparators C2, C3, and compared with the output signal which is displaced at 180 deg. from a triangular wave generator TRG. The outputs of the comparators C2, C3 are applied to the GTO of a PWM inverter through Schmitt circuits SH1, SH2 and gate circuits GC1, GC2. |
