A performance comparison of conventional and transverse flux linear switched reluctance motors

This paper presents a comprehensive comparison between conventional (longitudinal flux) linear switched reluctance machines (CLSRMs) and transverse flux linear switched reluctance machines (TLSRMs) so as to enable engineers to choose a structure suitable for their applications. A commonly-used single-sided CLSRM and 4 different TLSRM structures are considered for the comparison. For a fair comparison of the 2 types of LSRMs, equal dimensions, including equal length and magnetomotive force, are applied as much as possible. The analytical approach and 3-dimensional finite element analysis (FEA) are employed to obtain the performance of these machines. It is proven analytically that the CLSRM has a higher force capability compared to TLSRMs by as much as 6 times under linear B-H characteristic operating points. The results are reinforced by the FEA-based performance results. Furthermore, the CLSRMs are simpler to construct, resulting in lower manufacturing cost and thus paving an easier path for their market acceptance than TLSRMs. These results make CLSRMs the structure of choice for linear-switched reluctance motors.

Anahtar Kelimeler:

Linear switched reluctance motor, transverse flux motor, force density

A performance comparison of conventional and transverse flux linear switched reluctance motors

Keywords:

Linear switched reluctance motor, transverse flux motor, force density,

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Table Comparison of LSRM structures for similar force profiles. Type of LSRM
Based on linear operational characteristics of the machines, it has been proven that CLSRM has 6 times the propulsion force-generating capability of all the TLSRMs presented.
The high propulsion force-generating capability of the CLSRM is confirmed by the simulation for a design with an equal number of turns per pole in both machine structures.
The CLSRM fares well compared to TLSRMs in such performance indices as propulsion force per active weight and propulsion force per unit copper weight.
The complexity of construction in the CLSRM is much less severe than in all TLSRMs, leading to a cost-effective solution for linear motion applications.