To provide a controller of a three-phase synchronous motor which can improve position detection accuracy of a rotor when one three-phase synchronous motor is driven by inverters of a plurality of systems, and to provide an electric power steering device using the controller.SOLUTION: A controller 3 of a three-phase synchronous motor comprises: a three-phase synchronous motor comprising first three-phase winding 41 and second three-phase winding 42; a first inverter 31 connected to the first three-phase winding; a second inverter 32 connected to the second three-phase winding; a first controller for controlling the first inverter on the basis of a position of a rotor of the three-phase synchronous motor; and a second controller for controlling the second inverter on the basis of the position of the rotor of the three-phase synchronous motor. The first controller estimates the position of the rotor on the basis of neutral point potential of the first three-phase winding and neutral point potential of the second three-phase winding.SELECTED DRAWING: Figure 4
【課題】1つの三相同期電動機を複数系統のインバータで駆動する場合に、回転子の位置検出精度を向上することができる三相同期電動機の制御装置、並びにそれを用いる電動パワーステアリング装置を提供する。【解決手段】三相同期電動機の制御装置3が、第1の三相巻線41および第2の三相巻線42を備える三相同期電動機と、第1の三相巻線に接続される第1のインバータ31と、第2の三相巻線に接続される第2のインバータ32と、三相同期電動機の回転子位置に基づいて第1のインバータを制御する第1の制御装置と、三相同期電動機の回転子位置に基づいて第2のインバータを制御する第2の制御装置と、を備え、第1の制御装置は、第1の三相巻線の中性点電位と第2の三相巻線の中性点電位とに基づいて、回転子位置を推定する。【選択図】図4
CONTROLLER OF THREE-PHASE SYNCHRONOUS MOTOR AND ELECTRIC POWER STEERING DEVICE USING THE SAME
三相同期電動機の制御装置並びにそれを用いる電動パワーステアリング装置
2019-03-07
Patent
Electronic Resource
Japanese
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