Performance Investigation of Consequent-Pole PM Machines With E-core and C-core Modular Stators

This article investigates some novel modular consequent pole PM machines (CPMs) with E-core and C-core stators. Different slot-pole number combinations including 12-slot/10-pole ( Ns>2p ) 12-slot/14-pole xmlns:xlink="http://www.w3.org/1999/xlink">Ns<2p have been investigated. Their static dynamic electromagnetic performances investigated, e.g. the phase back-EMF, on-load torque, torque-speed curves, power factor-speed curves also efficiency maps are compared. It is found that existence of flux gaps (FGs) can improve average torque CPMs while structure be a better candidate where relatively low ripple desirable. Moreover, by selecting proper FG width, achieve flux-weakening capability higher factors over whole speed range. The finite element simulation results validated series experiments using both