Drive device and its control manner of three phase circuit AC motor system, and three phase circuit AC motor

摘要

P To provide a three-phase AC motor system capable of suppressing the generation of lower-order harmonics and carrier harmonics and of inhibiting generation of torque pulsation and with high efficiency. PSOLUTION: This three-phase AC motor system includes: a three-phase AC motor, having four groups of three-phase stator windings attached to a stator core and each electrical angle of which has a phase difference of 15 degrees; and four groups of inverters arranged so as to respectively become as a single pair with the four groups of three-phase stator windings. In the phase differences of modulating signals for determining the voltage chopped phases of the inverters and the second group with a phase difference of 15 degrees from the first group of windings has a phase difference of 135 degrees; the third group with a phase difference of 30 degrees from the first group has a phase difference of 270 degrees; and the fourth group with a phase difference of 45 degrees from the first group has a phase difference of 45 degrees. Alternatively and the second group with a phase difference of 15 degrees from the first group has a phase difference of 225 degrees; the third group with a phase difference of 30 degrees from the first group has a phase difference of 90 degrees; and the fourth group with a phase difference of 45 degrees from the first group has a phase difference of 315 degrees. PCOPYRIGHT: (C)2009 and JPO& INPIT