Nine-phase six-terminal pole-amplitude modulated induction motor for electric vehicle applications

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In electric drive applications that are based on high-speed induction motors (IMs) with an extended speed range, stator winding pole-changing is a possible technique to avoid oversizing the driving motor. The electronic pole changing employed in multiphase IMs has gained recent interest because it avoids physical winding reconfiguration. The effective number of poles of the air gap flux distribution can be electronically altered by simply changing the applied current sequence to a multiphase stator. The main problem associated with this technique is the significant increase in machine magnetising current with the increase in effective pole number when conventional multiphase distributed windings are employed. This study proposes a new fractional-slot concentrated winding layout with a special stator connection suitable for pole-amplitude modulated IMs that offers a 2:1 pole ratio while maintaining equal magnetising current for both winding pole pairs. Moreover, constant power operation can be achieved for a speed range of over 4 pu. The main concept is discussed and verified through simulations and experimentally. The machine mathematical model and the required vector space decomposition-based controller are also presented.

Original languageEnglish
Pages (from-to)1696-1707
Number of pages12
JournalIET Electric Power Applications
Volume13
Issue number11
DOIs
Publication statusPublished - 1 Nov 2019

    Fingerprint

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this