| 摘要 |
PURPOSE:To enable to reduce the current by individually leading the terminals of 3-phase windings and eliminating the branch of a current supplied to one winding to the other two windings. CONSTITUTION:Phase winding terminals (U1, U2, V1, V2, W1, W2) of a 3-phase induction motor are individually led, the first phase of a 3-phase AC power source is supplied to the first phase winding terminal (U1, U2) through the first bridge circuit connected with AC switches S1-S4 at the respective sides. The second phase of the 3-phase AC power source is supplied to the second phase winding terminal (V1, V2) through the second bridge circuit 2, the third phase of the 3-phase AC power soruce is supplied to the third phase winding terminal (W1, W2) through the third bridge circuit 3, AC switches S1, S3 are simultaneously controlled ON or OFF by the first signal P1, and AC switches S2, S4 are simultaneously controlled ON or OFF by the second signal P2. |
