Stray magnetic field distributed around a PMSM


Adam A. A. , Gulez K. , Koroglu S.

TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES, cilt.19, sa.1, ss.119-131, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 19 Konu: 1
  • Basım Tarihi: 2011
  • Doi Numarası: 10.3906/elk-1003-404
  • Dergi Adı: TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES
  • Sayfa Sayıları: ss.119-131

Özet

In this work, the low frequency electromagnetic emission from permanent magnet synchronous motors is studied. The main objective is to provide a safety region for humans in the vicinity of these motors, especially as these motors are now being used widely in inhabited areas, where high flux densities are expected. In this study, a new proposed equivalent magnetic circuit is used to estimate the stray fields at the surface of the motor. The analysis showed that the emission of the stray field in the radial direction depends on the permeability of the stator body. Low values of permeability may result in very high stray flux emissions with levels that require shielding to protect people in the surrounding areas. Relatively far away from the stator (e.g. 50 cm for the tested motor), the flux is normally at a low level and should not pose a threat to life.