| 摘要 |
PURPOSE:To inhibit zero phase currents, to equalize switching, to reduce a torque ripple and to realize the lowering of noises by properly using nineteen kinds of synthetic voltage vectors by employing two sets of voltage type inverter. CONSTITUTION:A three-phase induction motor 10 is constituted of mutually electrically separated three-phase symmetric windings each having terminals a1, a2, b1, b2 and c1, c2. The first terminal group a1, b1, c1 in the three-phase symmetric windings is connected to a first three phase voltage type inverter 11 while the second terminal group a2, b2, c2 is connected to a second three- phase voltage type inverter 12 through a three-phase reactor 13 for inhibiting zero-phase section currents. |
