Patent ID: 7304926

Claim:
A motor control system for controlling a motor apparatus, the motor control system comprising: a motor controller for generating a motor control output according to a reference signal and a feedback signal from the motor apparatus; and a clamp apparatus for receiving the motor control output and having a clamp function for clamping the motor control output, the clamp apparatus determining whether the clamp function should be activated to clamp the motor control output within an acceptable clamp range according to at least one motor stability signal; wherein when the motor stability signal indicates that the motor apparatus has not entered a stable state yet, the clamp apparatus does not clamp the motor control output from the motor controller, and when the motor stability signal indicates that the motor apparatus has been in a stable state, the clamp apparatus clamps the motor control output from the motor controller in the acceptable clamp range so as to avoid an abnormal motor control output resulting from external sudden change.