Design and analysis of linear oscillating motor for linear pump application-magnetic field, dynamics and thermotics

Abstract

A linear oscillating motor is an electromagnetic actuator that can achieve short-stroke reciprocating movement directly without auxiliary transmission mechanisms. It has been widely used in linear pump applications as the source of power and motion. However, because of the demand of high power density in a linear actuation system, the performance of linear oscillating motors has been the focus of studies and deserves further research for high power density. In this paper, a general framework of linear oscillating motor design and optimization is addressed in detail, including the electromagnetic, dynamics, and thermal aspects. First, the electromagnetic and dynamics characteristics are modeled to reveal the principle for optimization. Then, optimization and analysis on magnetic structure, resonant system, and thermal features are conducted, which provide the foundation for prototype development. Finally, experimental results are provided for validation. As a whole, this process offers complete guidance for high power density linear oscillating motors in linear pump applications.

Key words： linear oscillating motor; linear pump; magnetic field; motor optimization

Acknowledgments

The authors acknowledge the financial support from the National Key Basic Research Program of China (Grant No. 2014CB046406), the National Natural Science Foundation of China (NSFC) (Grant Nos. 51235002 and 51575026), Fundamental Research Funds for the Central Universities, Science and Technology on Aircraft Control Laboratory, and Fundamental Research on National Defense Program of China (Grant No. A0420132306).

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