| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor drive device with a small current ripple component capable of reducing vibrations while obtaining current detection values free from influences of switching noises.SOLUTION: The motor drive device uses a current detector for detecting a motor current to perform a current feedback control by means of PWM control. The current detection interval is set to be twice of a period from a peak or a bottom as a central reference of a carrier signal to a current detection trigger signal. The current detection trigger signal changes the output timing according to switching of the phases of the motor. |
