Calculation of slot leakage reactance for 3 - phase pole changing double winding adjustable - speed asynchronous motor
2.
Powerformer have some changes in constract with the conventional generator �� subsequently it also have some new problems in order to have an economical �� efficient �� credible development and application the structure and the philosophy of electromagnetism of powerformer will be on speaking terms changes electrical design �� magnetism design �� thermal design and structural design are have some new changes above all �� the electromagnetism parameter and the harmonic magnetomotive force of powerformer are studied in this paper first �� it mainly utilizes analytics to deduce formula of slot leakage reactance it considers three instances �� including monolayer - slot �� multilayer isometric - slot and multilayer anisometric - slot then �� the analytics and the fem are utilized to calculate slot leakage reactance of stator winding of prototype of powerformer and compare their results second �� the theory of utilitzing fem to calculate the reactance of powerformer is simply introduced �� including stable reactance �� transient and subtransient reactance specially �� the saturated influence of the stable reactance is considered then �� the results are analysed final �� it mainly introduces the influence of harmonic magnetomotive force of stator winding and analyses the harmonic magnetomotive force of stator winding then �� it mainly analyse harmonic magneto - motive force of stator winding through arranging various arrays of stator winding and observe their influence
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