| 摘要 |
PROBLEM TO BE SOLVED: To suppress the oscillation of an AC input current, etc., by providing a limiter which can get signal output which has a specified rate of voltage change, with the output of a proportional-plus-integral controller as input, in a switching system of AC-DC voltage type converter. SOLUTION: A control circuit 20' possesses a change rate limiter 208. Especially, the oscillation of an AC input current can be suppressed by the constitution of a proportional-plus-integral (PI) controller 202' which receives the input of the difference Δ Vd between the DC voltage command Vd* of the output of a subtracter 201 and the DC voltage Vd and a change rate limiter 208 which generates a signal of an AC input current amplitude command Ii*, with the AC input current amplitude command Ii* of the output of the PI controller 202' as input. |
