Sensorless speed control of a five‐phase induction machine under open‐phase condition

Abstract

See, stats, and : https : / / www . researchgate . net / publication / 267636653 Sensorless - Phase Induction - Phase Condition Article DOI : 10 . 1049 / joe . 2014 . 0050 CITATIONS 2 READS 57 4 : Some : Protection Innovative Ahmed Texas 15 SEE Ayman - Khalik Alexandria 198 SEE Shehab Texas 195 SEE Ahmed Qatar 247 , 552 SEE All . The . All - text and , letting . Abstract : Recently , multiphase machines have been promoted as competitors to their three - phase counterparts in high - power safety - critical drive applications . Among numerous advantages of multiphase induction machine (IM) drives , self - starting and operation under open phase (s) stand as the most salient features . With open phase (s) , optimal current control provides disturbance - free operation given a set of objective functions . Although hysteresis current control was merely employed in the literature as it offers a simple controller structure to control the remaining healthy phases , it is not suitable for high - power applications . In the literature , multiple synchronous reference frame (dq) control can be an alternative ; however , it requires back and forth transformations with several calculations and additional sophistication . In this paper , a simple technique employing adaptive proportional resonant (PR) current controllers is presented to control a five - phase IM under open - phase conditions . Results for both volt / hertz (V / f) and field oriented control (FOC) systems are presented . Moreover , sensorless operation under fault condition is also demonstrated by estimating the machine speed using a rotor flux - based model reference adaptive system (MRAS) speed estimator . The proposed controllers are experimentally verified and compared . Although FOC provides better dynamic performance , V / f control offers a simpler control structure and a lower number of PR controllers .