| 摘要 |
PROBLEM TO BE SOLVED: To provide a voltage step-down device used in a single-phase asynchronous drive device. SOLUTION: This voltage step-down device includes at least one set of forced rectifying type single-phase rectifiers 1, 2 or 1, 6 which act on the secondary coils 3, 4 or 3, 5 of a main drive transformer T, and the output of a direct current circuit passes through the main drive transformer T, and energy is collected in the secondary coil 5 by the forced rectifying type single-phase rectifier 6 which functions as a voltage step-up control rectifier, and the other forced rectifying type single-phase rectifiers 1, 2 operates in synchronism with a voltage converter. |
