Effects of geometrical factors on iron loss increase in wound toroidal cores energized by pulse width modulated voltage sources

Tutkun N., Moses A.

Journal of Magnetism and Magnetic Materials, cilt.281, sa.1, ss.110-114, 2004 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 281 Sayı: 1
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/j.jmmm.2004.04.096
  • Dergi Adı: Journal of Magnetism and Magnetic Materials
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.110-114
  • Anahtar Kelimeler: Electrical steels, Magnetic losses, Magnetic measurements, PWM excitation, Toroidal cores
  • İstanbul Ticaret Üniversitesi Adresli: Hayır

Özet

The pulse width modulated (PWM) inverter power supplies have been used increasingly to drive many electromagnetic devices for various purposes. When typical magnetic cores are energized by such voltage waveforms, additional iron losses occur due to distorted flux waveform. Most of these losses are due to an increase in frequency dependent losses. It should be noted that core geometry may also affect total power loss increase under PWM voltage excitation. This is because of a different magnetization process with respect to sinusoidal excitation. The effects of geometrical factors on magnetic properties of wound toroidal cores made of 3% grain oriented electrical steel were investigated. The results indicated that geometrical factors affect an iron loss increase under PWM voltage excitation as well as under sinusoidal excitation. The aspect ratio is particularly important in this regard. © 2004 Elsevier B.V. All rights reserved.