Motor control device, optical apparatus, motor control method, and storage medium

An optical apparatus comprising:

• at least one processor or circuit configured to function as:
• a motor control device including
• a target position generation unit configured to generate a target position for rotation control of motor,
• an encoding unit configured to detect a rotational phase of the motor and convert the rotational phase into rotation position information,
• an advance angle control unit configured to generate a target advance angle according to a deviation amount between the target position and the rotation position information and perform advance angle control of a drive signal, and
• a drive signal generation unit configured to add the target advance angle to the rotation position information to generate a drive count value and generate the drive signal based on the drive count value,
• the advance angle control unit being configured to
• set or calculate correction data according to the rotational phase, and
• correct the target advance angle based on the correction data;
• a motor that is subjected to rotation control by the motor control device;
• and
• a lens that is moved by the motor.

A motor control method comprising:

• generating a target position for rotation control of a motor;
• detecting a rotational phase of the motor and converting the rotational phase into rotation position information;
• generating a target advance angle according to a deviation amount between the target position and the rotation position information and performing advance angle control of a drive signal;
• and
• superimposing the target advance angle on the rotation position information to generate a drive count value and generating the drive signal based on the drive count value,
• wherein the performing of the advance angle control
• sets or calculates correction data according to the rotational phase, and
• corrects the target advance angle based on the correction data.

A non-transitory computer-readable storage medium configured to store a computer program comprising instructions for executing following processes:

• generating a target position for rotation control of a motor;
• detecting a rotational phase of the motor and converting the rotational phase into rotation position information;
• generating a target advance angle according to a deviation amount between the target position and the rotation position information and performing advance angle control of a drive signal;
• and
• superimposing the target advance angle on the rotation position information to generate a drive count value and generating the drive signal based on the drive count value,
• wherein the performing of the advance angle control
• sets or calculates correction data according to the rotational phase, and
• corrects the target advance angle based on the correction data.