Method and system for self-calibration of an induction machine drive

摘要

A method and system for estimating slip gain for use in the control of torque in a multi-phase induction machine. The slip gain estimate is based on a transient response of the induction machine to torque command changes. The invention is independent of machine parameters other than the slip gain. The method uses a slip gain estimation algorithm that is suited for use either as a self-calibration procedure or a background procedure that continually updates the slip gain during normal operation of the induction machine. The estimation method of the invention is suited for automotive driveline applications, which typically have limited sensor capability and which may present tuning problems associated with high volume production and with slip gain estimates when temperature changes during normal operation.