Study of Magnetic Properties on the Corrosion Behavior and Influence of Temperature in Permanent Magnet (Nd-Fe-B) Used in PMSM

Authors: N. Yogal, C. Lehrmann

Abstract:

The use of permanent magnets (PM) is increasing in permanent magnet synchronous machines (PMSM) to fulfill the requirements of high efficiency machines in modern industry. PMSM are widely used in industrial applications, wind power plants and the automotive industry. Since PMSM are used in different environmental conditions, the long-term effect of NdFeB-based magnets at high temperatures and their corrosion behavior have to be studied due to the irreversible loss of magnetic properties. In this paper, the effect of magnetic properties due to corrosion and increasing temperature in a climatic chamber has been presented. The magnetic moment and magnetic field of the magnets were studied experimentally.

Keywords: Permanent magnets (PM), NdFeB, corrosion behavior, temperature effect, permanent magnet synchronous machine (PMSM).

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1096659

References:

[1] Ruoho, S., J. Kolehmainen, J. Ikheimo, and A. Arkkio. 2010. Interdependence of demagnetization, loading, and temperature rise in a permanent-magnet synchronous motor. IEEE Trans. Magn. 46:949 – 953
[2] IEC/EN 60079-7: Explosive atmospheres - Part 7: “Equipment protection by increase safety”, Geneva, Switzerland, 2007
[3] S.R. Trout, Use of Helmholtz Coils for Magnetic Measurements, IEEE Trans. Magn., vol. 24, no. 4, July 1988, pp. 2108-2111
[4] IEC/EN 60079-0: Explosive atmospheres - Part 0: “Equipment - General requirements”, Geneva, Switzerland, 2011
[5] IEC/EN 60079-14: Explosive atmospheres - Part 14: Electrical installations design, selection and erection, Geneva, Switzerland, 2013