Design and Analysis of Double-Sided Linear Hybrid Excited Flux Switching Machine with Yokeless Mover

Abstract

In this paper, a new yokeless double-sided linear hybrid excitation flux switching machine (DSYLHEFSM) is proposed. A hybrid topology is used to increase thrust force density and speed. The importance of this new machine is to eliminate the mover yoke, which can decrease the size of the machine. The elimination of yoke in the mover also increases thrust force density. Ferrite magnets are used to reduce machine cost. The volume of the magnet is also smaller than the traditional design. Double-sided model is used to cancel the effect of normal force. Several factors such as split ratio (S.R), AC winding slot area (T <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">AC</inf> ), stator pole alignment, stator pole width (S <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">W R</inf> ), and stator pole height (S <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">HR</inf> ) that increases thrust force density are studied through finite element analysis. The electromagnetic analysis is performed using JMAG version 2017. Electromagnetic analysis of DYLHEFSM shows bipolar flux linkages and back electromotive force, reduced detent force and normal force, and increased thrust density and efficiency. Under the same volume constraints and electrical load, the proposed machine accomplished greater average thrust force than the traditional model.