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 基于上述原因,本文對(duì)powerformer的電磁參數(shù)以及定子繞組諧波磁勢(shì)進(jìn)行了研究。首先是用解析法推導(dǎo)出powerformer定子繞組槽漏抗的計(jì)算公式,考慮了單層圓形半閉口槽、多層等半徑圓形半閉口槽和多層不等半徑圓形半閉口槽三種情況,并對(duì)powerformer樣機(jī)的定子繞組槽漏抗用解析法和有限元法進(jìn)行了計(jì)算,并比較其結(jié)果;其次,簡要介紹了有限元法計(jì)算powerformer電抗參數(shù)的原理,包括穩(wěn)態(tài)電抗、瞬態(tài)電抗和超瞬態(tài)電抗,對(duì)穩(wěn)態(tài)電抗考慮飽和影響,對(duì)結(jié)果進(jìn)行分析;最后,介紹定子繞組諧波磁勢(shì)對(duì)電機(jī)運(yùn)行性能的影響并對(duì)定子繞組諧波磁勢(shì)進(jìn)行了分析。然后通過對(duì)定子繞組進(jìn)行不同排列來分析定子繞組諧波磁勢(shì),看看繞組排列對(duì)諧波磁勢(shì)的影響。
英文解釋
having unsymmetrical parts or unequal dimensions or measurements 同義詞:unsymmetrical,