Control device for alternating-current electric motor and electric vehicle equipped with the same, and electric aircraft

A control device for an alternating-current electric motor that controls an alternating-current electric motor via an inverter based on angle information of a position sensor that detects an angular position of the alternating-current electric motor, wherein

• the position sensor is set such that a ratio between a number of polar pairs of the alternating-current electric motor and an axial double angle X of the position sensor is an integer multiple, and
• the control device includes,
• an electrical angle phase calculation unit that multiplies angle information of the alternating-current electric motor detected by the position sensor by the integer multiple and converts the multiplied angle information into electrical angle phase information of the alternating-current electric motor,
• an electrical angle rotation number calculation unit that calculates an electrical angle rotation number of the alternating-current electric motor based on the electrical angle phase information of the alternating-current electric motor calculated by the electrical angle phase calculation unit, and
• a vector control unit that calculates a voltage command value to be output to the inverter based on the electrical angle phase information of the alternating-current electric motor calculated by the electrical angle phase calculation unit and the electrical angle rotation number of the alternating-current electric motor calculated by the electrical angle rotation number calculation unit.