Motor control device, motor drive control device, motor device, and motor control program

A motor control device comprising:

• a rotation speed calculation unit configured to calculate a rotation speed of a motor based on a rotation position detection signal of the motor;
• an energization stop time period calculation unit configured to calculate an energization stop time period for stopping energization to all coils included in the motor based on the rotation speed of the motor;
• and
• an energization signal generation unit configured to generate an energization signal for controlling energization to each of the coils of the motor to switch energization to each of the coils of the motor and to stop energization to all the coils of the motor in the energization stop time period;
• and
• the energization stop time period is calculated to be shorter as the rotation speed increases;
• and
• a ratio of the energization stop time period with respect to one energization time period does not change according to the rotation speed,
• after an end of energization to any of the coils of the motor, the energization signal generation unit stops energization to the coils of the motor being energized other than the any of the coils over the energization stop time period, and
• the energization signal generation unit performs overlap energization in which before an end of energization to any of the coils of the motor, energization to the coils of the motor other than the any of the coils is continued over a predetermined time period, and
• wherein the energization stop time period after high-side overlap energization differs in lengths from the energization stop time period after low-side overlap energization.