Abstract
This paper investigates the performance analysis and mathematical modeling of a staggered-tooth transverse-flux permanent magnet linear synchronous machine (STTF-PMLSM), which is characterized by simple structure and low flux leakage. Firstly, the structure advantages and operation principle of the STTF-PMLSM are introduced, and a simplified one phase model is established to investigate the performance of the machine in order to save the computation time. Then, the electromagnetic characteristics, including no-load flux linkage, electromotive force (EMF), inductance, detent force and thrust force, are simulated and analyzed in detail. After that, the theoretical analysis of the detent force, thrust force, and power factor are carried out. And the theoretical analysis results are validated with 3-D finite-element method (FEM). Finally, an improved mathematical model of the machine based on d-q rotating coordinate system is proposed, in which inductance harmonics and coupling between d- and q-axis inductance is considered. The results from the proposed mathematical model are in accordance with the results from 3-D FEM, which proves the validity and effectiveness of the proposed mathematical model. This provides a powerful foundation for the control of the machine.
Highlights
Linear drive systems integrated with linear electrical machines have many advantages, such as high dynamic performance, high acceleration, and easy maintenance compared with their rotary-to-linear counterparts [1]
transverse‐flux machine (TFM) with C-type stator core was proposed stator core is complex and it can only be made of soft magnetic composite (SMC), which will lead to by the Rolls-Royce Research Center, in which the stator core is complex and it can only be made of soft low saturation magnetic flux density
The following conclusions can be drawn from the analysis and modeling of the STTF‐PMLSM: The following conclusions can be drawn from the analysis and modeling of the STTF-PMLSM: (1) The stator core of the STTF‐PMLSM is unsegmented and can be fabricated by silicon‐iron
Summary
Linear drive systems integrated with linear electrical machines have many advantages, such as high dynamic performance, high acceleration, and easy maintenance compared with their rotary-to-linear counterparts [1]. The transverse-flux PM linear machine is becoming attractive for its larger force density because its motion direction is perpendicular to the plane of magnetic flux, which realizes the decoupling between electric loading and magnetic loading. The force density of the transverse-flux PM linear machine can be largely enhanced by decreasing the pole pitch or increasing the pole number of the machine for a given geometrical dimension [5]. Enhanced by decreasing the pole pitch or increasing the pole number of the machine for a given geometrical dimension [5]. Various transverse‐flux machine (TFM) topologies have been put forward since the first prototype of TFM with. Transverse-flux machine (TFM) topologies have been put forward since the by first prototype of TFM with
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