Affiliations: [a] Institute of Industry and Trade Measurement Technique, China Jiliang University, Hangzhou, Zhejiang, China | [b] Zhejiang Province Key Laboratory of Advanced Manufacturing Technology, Zhejiang University, Hangzhou, Zhejiang, China
Correspondence:
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Corresponding author: Wen He, Institute of Manufacturing Engineering and Automation, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China. Tel.: +86 571 87952627; Fax: +86 571 87952627; E-mail: [email protected].
Abstract: This paper presents a novel double-magnetic-source magnetic circuit (DMSMC) with pole shoes (PS) in order to achieve high and uniform air-gap magnetic field in an angular vibration exciter. First, the structure of the DMSMC with PS is proposed based on the demand of the angular displacement of 60∘, in which the four pair of permanent magnets are adopted. After that, the DMSMC is modeled and analyzed theoretically by the equivalent circuit method, which has been verified that the magnetic circuit structure can realize high magnetic flux density (MFD) in the axial air-gap. To improve the uniformity of the MFD, the DMSMC with PS is proposed and the role of PS is analyzed by the principle of magnetic flux refraction. Then, the influence factors of the MFD in the air-gap, such as the permanent magnet with or without PS, the parameters of the magnet and the PS, are analyzed with the finite element method. The simulation results demonstrate that the optimized DMSMC with PS can obtain high and uniform MFD in the air-gap. Finally, the experimental results for the angular vibration exciter prototype prove to be well consistent with the simulation results, which further verify the validity of the proposed magnetic circuit structure.
Keywords: Double-magnetic-source, pole shoe, angular vibration exciter, axial air-gap
