| 摘要 |
PROBLEM TO BE SOLVED: To control a zoro-phase current in a motor drive system using a semiconductor power converter, and to make the motor drive system small and low cost. SOLUTION: Before each phase winding 33a, 33b or 33c of a motor input line 33 for joining an output terminal of a semiconductor power converter and a stator winding 32 of a motor is connected to each corresponding phase stator winding 32a1, 32b2 of 32c3, the phase windings 33a, 33b and 33c are passed through each winding groove 31c1, 31a1 or 31b1 of a winding groove 31 and turned around a stator core 30 with at least one or more turns. The turned part of each phase input line around the stator core 30 functions as a reactor having an inner steel core. At the same time, a zero reactor in a three-phase circuit is formed by three-phase input lines 33a, 33b, and 33c with the common stator core 30. In this way, the zero phase current is controlled in the motor drive system without additional zero-phase reactors. |
