Induction motor parameter tuning for high-performance drives

A new approach to the parameter tuning of induction motors in the course of drive commissioning is proposed. Usually, the motors originate from different manufacturers, and so the parameters are not known prior to startup of the drive. The control system of the drive utilizes the parameters obtained by extraneous tests and based on a number of assumptions that are not valid under all operating conditions. Therefore, completion of the tuning of all motors at an industrial site is quite time consuming, and it is a very difficult job, even to skilled engineers. To overcome these problems, the proposed tuning procedure is sensitive to detuning and independent of information on other parameters. The state of detuning is clearly noticeable in the shape of the controller output signal of the drive system. The proposed scheme has the advantage of being general and readily applicable to a wide range of other systems, such as AC/DC boost converters, surface-mounted permanent-magnet synchronous motors, interior permanent-magnet synchronous motors, etc. Experimental results are offered to validate the feasibility of the proposed tuning algorithm.