Motor control device and motor

A motor control device that controls a motor, the motor control device comprising:

• a calculator to calculate angle information related to a rotation angle of a rotor of the motor based on an output from a magnetic sensor;
• and
• a corrector to correct the angle information calculated by the calculator;
• wherein the magnetic sensor is a sensor that includes a magnetoresistance effect element and is operable to output signals of two systems out of phase with each other by 180°;
• and
• the corrector is operable to correct the angle information using a correction amount expressed by a function including a current value of a motor current supplied to a stator of the motor and a phase angle of the motor current, a current value of a power source current supplied to the motor control device, and a mechanical angle of the rotor calculated based on an output from the magnetic sensor;
• wherein the motor comprises the motor control device;
• and
• the rotor is rotatable about a central axis;
• the stator is radially opposing the rotor across a gap;
• a sensor magnet is fixed to the rotor;
• the magnetic sensor axially opposes the sensor magnet across a gap;
• and
• a shielding portion is to shield a magnetic flux;
• wherein
• the motor control device includes a substrate positioned on one axial side of the rotor;
• the shielding portion includes a tubular portion having a tubular shape surrounding the sensor magnet;
• an end portion on the one axial side of the tubular portion is in contact with a surface on another axial side of the substrate;
• and
• the magnetic sensor is attached to a portion surrounded by an end portion on the one axial side of the tubular portion of a surface on the other axial side of the substrate.