CONTROLLING DEVICE FOR CONTROLLING TWO-WINDING MOTOR

PROBLEM TO BE SOLVED: To provide a two-winding motor capable of suppressing a ground current flowing from the two-motor winding side of an inverter to a power supply side.SOLUTION: A PWM controller 19-1 generates a three-phase AC voltage exbased on a three-phase AC voltage command of a first-system and a carrier of a reference carrier phase θ(for example, 90°), and supplies the three-phase voltage exto a two-winding motor 2. A carrier phase regulator 21 calculates a variable carrier phase θ so that the smaller the speed command ω, the closer to the phase shift component θ(ω) (for example, -90°) and the larger the speed command ω, the more distantly to the phase shift component θ(ω). A PWM controller 19-2 generates a three-phase AC voltage exbased on a three-phase AC voltage command of a second system and a carrier of the variable carrier phase θ, and supplies the three-phase AC voltage exto the two-winding motor 2.SELECTED DRAWING: Figure 1 【課題】インバータの２巻線モータ側から電源側へ流れる対地電流を抑制する。【解決手段】ＰＷＭ制御器１９−１は、第１系統の３相交流電圧指令及び基準キャリア位相θ０（例えば９０°）のキャリアに基づいて３相交流電圧ｅｘ1＊を生成し、３相交流電圧ｅｘ1＊を２巻線モータ２へ供給する。キャリア位相レギュレータ２１は、速度指令ω＊が小さいほど位相シフト成分θ（ω＊）（例えば−９０°）に近くなり、速度指令ω＊が大きいほど位相シフト成分θ（ω＊）から離れるように、可変キャリア位相θを算出する。ＰＷＭ制御器１９−２は、第２系統の３相交流電圧指令及び可変キャリア位相θのキャリアに基づいて３相交流電圧ｅｘ2＊を生成し、３相交流電圧ｅｘ2＊を２巻線モータ２へ供給する。【選択図】図１