Analysis of the Structure and Cogging Force Characteristic of a Novel Transverse Flux Permanent Magnet Linear Machine ()
Abstract
The linear motor is finding applications very rapidly in linear servo systems for its favorable features of simple structure, quick speed response, production of thrust force with no additional converters etc, but the low force density has limited its applications. Regarding high toque/force density machines, the transverse flux permanent magnet machine is an ideal alternative. However, the existing transverse flux structures are very complicated and, furthermore, the cogging torque/force leads to mechanical vibration and noise in-evitably. In this paper, based on the operating principle analysis of the Weh’s prototype, a novel concept of Transverse Flux Machine is proposed by derivation of it to achieve the linear motion, which is relatively sim-ple to manufacture. Further, the characteristic of the cogging force is both theoretically analyzed and numeri-cally computed using three-dimensional finite element method. It is shown that the proposed Transverse Flux Permanent Magnet Linear Machine (TFPMLM) has integrated the advantage of high force density with that of simple manufacturing process. In addition, the three-phase configuration is valid for the reduction of cog-ging force and consequently, thrust force ripple, which is vital for high performance linear servo applications of low speed, high force and direct drive in industrial and martial areas.
Share and Cite:
Q. WANG, "Analysis of the Structure and Cogging Force Characteristic of a Novel Transverse Flux Permanent Magnet Linear Machine," Energy and Power Engineering, Vol. 1 No. 1, 2009, pp. 39-45.
Conflicts of Interest
The authors declare no conflicts of interest.