Motor controller and motor control method

Abstract

To provide a motor controller in which a detection circuit of three-phase motor current is simple and which has high reliability in detection of a current value and motor control using a current value and to provide a motor control method.SOLUTION: A motor controller for controlling a three-phase motor based on a current command value includes: a first current sensor for detecting a current value of first current in three-phase currents of the three-phase motor based on a current detection period; a second current sensor for detecting a current value of second current other than the first current in the three-phase currents based on the current detection period; and a controller for calculating a current value of third current other than the first current and second current in the three-phase currents based on a current control period independent of the current detection period and calculating the current command value based on a current value of the three-phase currents.SELECTED DRAWING: Figure 1

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