Investigation of a Novel Ironless Linear Synchronous Machine with Double-layer Winding and Quasi-Halbach Magnets

Xie, Zhedong; Zhang, Jiuding; Mei, Weihu; Lu, Qinfen

doi:10.1109/icems.2019.8922060

2019 22nd International Conference on Electrical Machines and Systems (ICEMS) 2019

DOI: 10.1109/icems.2019.8922060

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Investigation of a Novel Ironless Linear Synchronous Machine with Double-layer Winding and Quasi-Halbach Magnets

Zhedong Xie

Jiuding Zhang

Weihu Mei

et al.

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“…The use of rotating ironless permanent magnet generators is also of interest for wind turbine power generation [26,27]. Regarding the use of ironless linear permanent magnet machines, the main applications are related to launchers, semiconductor processing devices, photoetching machines and automation equipment [28][29][30][31]. In the literature, only a few papers address the design and experimental performance analysis of ironless PMLG for wave energy conversion.…”

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An Experimental Comparison between an Ironless and a Traditional Permanent Magnet Linear Generator for Wave Energy Conversion

et al. 2022

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Permanent Magnet Linear Generators (PMLGs) are currently being studied for sea wave energy harvesting. Typically, a PMLG consists of an iron-made armature and a moving translator. The permanent magnets adoption produces parasitic effects, such as cogging force, and the machine weight increment. A solution could be the adoption of an ironless configuration, accepting a power density reduction. This paper investigates the use of ironless PMLGs in sea wave energy conversion systems by an experimental comparative analysis between an iron PMLG prototype and an ironless PMLG prototype, which share the same geometry. The main electrical and mechanical parameters (resistance, mass, and magnetic fields) were preliminarily measured. Subsequently, open-circuit and load tests were carried out to compare the induced voltages, the energy transferred to a resistive load, efficiency and the load average power. The reported comparison shows that iron PMLG performances are significantly superior to the ironless ones during the open-circuit tests, as expected. However, the analysis carried out through the load tests shows that the cogging force significantly limits the energy production, obtaining similar values in both machines. Therefore, the experimental tests justify the use of ironless machines in sea wave energy harvesting, where the maximization of energy production is a relevant target.

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An Experimental Comparison between an Ironless and a Traditional Permanent Magnet Linear Generator for Wave Energy Conversion

et al. 2022

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Improved Analytical Modeling of a Novel Ironless Linear Synchronous Machine With Asymmetrical Double-Layer Winding Topology

Xie

Mei

et al. 2021

IEEE Trans. on Ind. Applicat.

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Investigation of a Novel Ironless Linear Synchronous Machine with Double-layer Winding and Quasi-Halbach Magnets

Cited by 2 publications

References 6 publications

An Experimental Comparison between an Ironless and a Traditional Permanent Magnet Linear Generator for Wave Energy Conversion

An Experimental Comparison between an Ironless and a Traditional Permanent Magnet Linear Generator for Wave Energy Conversion

Improved Analytical Modeling of a Novel Ironless Linear Synchronous Machine With Asymmetrical Double-Layer Winding Topology

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