| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor controller for controlling the rotation of a motor by detecting a motor current capable of matching a PWM carrier cycle and detection timing of the motor current with easily means.SOLUTION: The motor controller obtains a motor current by thinning signals output from a &Dgr;&Sgr;AD converter using a thinning filter. The motor controller synchronizes a PWM synchronizing signal with operation start timing of the thinning filter. After detecting the motor current by performing a digital filter processing using the thinning filter, the operation of the thinning filter is stopped. |
