CONTROL SYSTEM FOR IMPROVING INDUCTION MOTOR TRANSIENT RESPONSE BY EXCITATION ANGLE CONTROL

摘要

A variable frequency AC induction motor servo control system is described wherein slip is momentarily increased in response to error signal transients. In a preferred embodiment, a phase shift is introduced in the energizing stator current as the servo velocity error signal increases over at least the lower portion of the error signal range, the maximum phase shift being between 45 DEG and 90 DEG .