| 摘要 |
PROBLEM TO BE SOLVED: To determine whether or not steady rotation of a motor is performed without the need for addition of a signal wire.SOLUTION: A motor drive device 21 includes: a control circuit 100 that generates a driver control signal S10 by receiving input of an acceleration signal SU and a deceleration signal SD; a drive circuit 200 that generates a motor drive signal S3 depending on the driver control signal S10; and a phase lock determination circuit 500 that determines whether or not the number of motor rotations is stably kept at a desired target value, by monitoring input patterns of the acceleration signal SU and the deceleration signal SD. |
