Voltage and Current Harmonic Variations in Three Phase Induction Motors with Different Stator Coil Pitches

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Birbir Y., Noğay H. S.

Int. J. Of Energy, cilt.1, sa.4, 2007 (Hakemli Dergi)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1 Sayı: 4
  • Basım Tarihi: 2007
  • Dergi Adı: Int. J. Of Energy
  • Derginin Tarandığı İndeksler: EBSCO Education Source
  • Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
  • Bursa Uludağ Üniversitesi Adresli: Hayır

Özet

  Abstract: - In this study, firstly a sinusoidal pulse width modulation (SPWM) inverter feeding five different chorded three-phase induction motors were tested for low-order odd harmonic voltage component and efficiency at different loads. Secondly the motors fed by sine voltage again were tested for low – order odd harmonic voltage and current component and efficiency at different loads. In both two situations; total harmonic distortion (THD) due to 3rd, 5th, 7th, 9th, 11th and 13th harmonics were less in a motor with (1-7) 120o coil pitch at over load. Particular harmonic order for each coil pitch was suppressed and the increasing quantity of efficiency in a motor with (1-6)1000 coil pitch was increased by 4, 92 % fed by PWM and 8, 86 % fed by sine voltage. The full pitch motor with (1-10) 180o coil pitch has more harmonics than other motors. Keywords: - Coil pitch; Chording; Harmonics; Stator winding