Rotor position calibration method and device, and storage medium

A rotor position calibration device, which is applied to a permanent magnet synchronous motor, comprising:

• a theoretical position determination module that determines, according to a preset target rotational speed, a theoretical position of a target point on a rotor of the permanent magnet synchronous motor in correspondence with the preset target rotational speed at each of periodic time points;
• a driving module that determines a target driving force according to the preset target rotational speed and applying the target driving force to the rotor to rotate the rotor;
• an actual position monitoring module that monitors an actual position of the target point at each of the periodic time points in real time;
• a position error determination module that determines position errors at a plurality of time points in a preset measurement period according to the theoretical positions and the actual positions;
• and
• a rotor position calibration module, which is for determining an error curve based on the position errors, and calibrating a rotor position based on the error curve.

A device for rotor position calibration, comprising:

• a storage medium storing instructions;
• and
• at least one processor configured to execute the instructions to:
• determine, according to a target rotational speed, a theoretical position of a target point on a rotor of a motor in correspondence with the target rotational speed at each of periodic time points;
• determine a target driving force according to the target rotational speed;
• apply the target driving force to the rotor to rotate the rotor;
• monitor an actual position of the target point at each of the periodic time points in real time;
• determine position errors at a plurality of time points in a measurement period according to the theoretical positions and the actual positions;
• determine an error curve based on the position errors;
• and
• calibrate a rotor position based on the error curve.