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The fractional slot windings are widely used in rotating machine in order to increase the flexibility of design and improve the voltage waveform. However, the MMF wave of fractional-slot windings are found to contain unique harmonic components, which are designated as even space flux harmonics, fractional flux harmonics, or both. They may cause stray loss and stator core vibration. This paper proposes...
Following Budker's proposal1], experiments on plasma betatrons were carried out in several laboratories. Large conduction currents were observed as a result of gas breakdown, but the current of energetic electrons did not exceed 10 A. We adopted plasma injection to start a beam in good vacuum. The chamber consisted of outer and inner glass pipes lined with stainless steel mesh at radii of 5 cm and...
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