Cogging Force Issues of Permanent Magnet Linear Generator for Electric Vehicle

Izzeldin Idris Abdalla, Ezrann Zainal, A.R.T. Anwarudin, Firmansyah Firmansyah, A. Rashid A. Aziz, Morgan Heikal

Research output: Contribution to journalArticlepeer-review


Alternatives to hydraulic drives that used on vehicles are necessary in order to reduce the Carbon dioxide ( 2 CO ) emission and oil consumption. Hence better performance and efficiency of the vehicles can be achieved by using free piston engine, in which the piston reciprocate linearly with a permanent magnet linear generator (PMLG) without the need of a crankshaft. The PMLG has high performance, but suffering from the cogging force. The cogging force induces undesired vibration and acoustic noise and makes a ripple in the thrust force. Moreover, the cogging force deteriorates the control characteristics, particularly in terms of the position control and speed precisely. This paper proposes Somaloy to replace the laminated silicon steel sheets in order to reduce the cogging force in a PMLG. Through a finite-element analysis, it has been shown that, the stator core made of Somaloy minimizes the cogging force of the PMLG, moreover, giving larger flux-linkage and back-electromotive force (B-EMF), respectively.
Original languageEnglish
Pages (from-to)489-502
Number of pages14
JournalJournal of Electrical Systems
Issue number3
Publication statusPublished - 29 Sept 2017

Bibliographical note

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  • Cogging force
  • ferromagnetic materials
  • Finite element analysis
  • permanent magnet linear generator


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