Novel interspersed windings to reduce space flux harmonics caused by fractional-slot of synchronous machine
Fractional-slot windings is widely used in synchronous machine due to give us more flexibility on selection of the number of slot at design stage. It is also known that fractional-slot windings produces additional harmonics compare to integral-slot windings. These harmonics may cause increasing of stray losses and stator core vibration This paper describes the result of space flux harmonics caused by fractional-slot windings and propose novel interspersed windings that reduces the even order and/or fractional number space flux harmonic components. The advantage of proposed winding was confirmed by using numerical analysis and experiment using model winding machine.
Special winding to reduce space flux harmonics caused by fractional-slot
It is known that fractional-slot winding produces different harmonics from integral-slot winding. The authors studied space flux harmonics caused by fractional-slot winding and proposed a new winding method that reduces the low order space flux harmonic components (special winding method based on intersperse one coil winding), The advantage of this proposed winding method was confirmed using a model winding.
Pole-face loss in solid-rotor turbine generators
Discussion and author's closure of paper 43–76, by W. W. Kuyper, presented at the AIEE national technical meeting, Cleveland, Ohio, June 21–25, 1943, and published in AIEE TRANSACTIONS, volume 62, 1943, pages 827–34.