Arif IQBAL, Vinay PANT, Girish Kumar SINGH

Some observations on no-load losses of an asymmetrical six-phase synchronous machine

The use of multiphase (more than three-phase) ac machines is well adopted in different high power applications and the evaluation of different losses (no load losses, short circuit load loss, friction and windage losses, and stray loss) in multiphase machines is extremely important for the correct determination of their operating performance. Therefore, the paper presents a detailed experimental investigation of an asymmetrical (30 ◦ displacement between the two winding sets) six-phase synchronous machine for determination of different losses under no-load condition. Moreover, a comparative study of losses for a six-phase and three-phase synchronous machine has also been performed. The results are presented for different synchronous speeds (associated with frequency range 30 55 Hz).

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