| 摘要 |
PURPOSE:To allow stabilized control by suppressing the interference between a load current control system and the primary current control system of a transformer automatically. CONSTITUTION:A transformer TR is connected, on the primary thereof, with the output side of an inverter and, on the secondary thereof, with an AC load LOAD. A detector CT2 detects the primary current 11 of transformer and detector CTL detects the load current IL. A comparator C2 outputs the difference epsilonL between a detected value IL and a command value IL* and a comparator C2 outputs the difference epsilon1 between a detected value I1* and a command value I1*. A fuzzy operating means FUZ operates a variation DELTAei from these differences. The variation DELTAei is added with a signal VL* from a feed forward circuit to produce a PWM control input signal ei. A pulse width modulation control circuit PWM outputs PWM control input signals, i.e., gate signals q1, q2, based on the signal ei. |
