合肥工业大学学报(自然科学版)
閤肥工業大學學報(自然科學版)
합비공업대학학보(자연과학판)
Journal of Hefei University of Technology (Natural Science)
2015年
9期
1197-1201
,共5页
调速永磁同步电动机%阶梯形永磁体%气隙磁密波形%正弦分布%谐波分析
調速永磁同步電動機%階梯形永磁體%氣隙磁密波形%正絃分佈%諧波分析
조속영자동보전동궤%계제형영자체%기극자밀파형%정현분포%해파분석
permanent magnet synchronous motor(PMSM) with adjustable speed%step structure of permanent magnet%air-gap flux density waveform(AFDW)%sinusoidal distribution%harmonic analysis
调速永磁同步电动机要求永磁体产生的气隙磁密波形呈正弦分布,以此产生正弦形的空载反电动势,为此文章设计出一阶梯形永磁体结构以产生近似正弦分布的气隙磁密波形;对一矩形周期函数和阶梯形周期函数分别进行傅里叶级数展开,得出在特定条件下阶梯形周期函数的各次谐波幅值比矩形周期函数小,鉴于此提出阶梯形永磁体结构;在磁场分析软件Magnet中,分别搭建了阶梯形调速永磁同步电机及瓦片形调速永磁同步电机的有限元分析模型并仿真,对仿真获取的气隙磁密做谐波分析,结果表明阶梯形永磁体产生的气隙磁密的各次谐波幅值明显小于瓦片形永磁体。
調速永磁同步電動機要求永磁體產生的氣隙磁密波形呈正絃分佈,以此產生正絃形的空載反電動勢,為此文章設計齣一階梯形永磁體結構以產生近似正絃分佈的氣隙磁密波形;對一矩形週期函數和階梯形週期函數分彆進行傅裏葉級數展開,得齣在特定條件下階梯形週期函數的各次諧波幅值比矩形週期函數小,鑒于此提齣階梯形永磁體結構;在磁場分析軟件Magnet中,分彆搭建瞭階梯形調速永磁同步電機及瓦片形調速永磁同步電機的有限元分析模型併倣真,對倣真穫取的氣隙磁密做諧波分析,結果錶明階梯形永磁體產生的氣隙磁密的各次諧波幅值明顯小于瓦片形永磁體。
조속영자동보전동궤요구영자체산생적기극자밀파형정정현분포,이차산생정현형적공재반전동세,위차문장설계출일계제형영자체결구이산생근사정현분포적기극자밀파형;대일구형주기함수화계제형주기함수분별진행부리협급수전개,득출재특정조건하계제형주기함수적각차해파폭치비구형주기함수소,감우차제출계제형영자체결구;재자장분석연건Magnet중,분별탑건료계제형조속영자동보전궤급와편형조속영자동보전궤적유한원분석모형병방진,대방진획취적기극자밀주해파분석,결과표명계제형영자체산생적기극자밀적각차해파폭치명현소우와편형영자체。
Permanent magnet synchronous motor(PMSM ) with adjustable speed requires the sinusoidal distribution of the air‐gap flux density waveform(AFDW) to excite the sinusoidal no‐load back elec‐tromotive force .For this reason ,a step structure of permanent magnet(PM ) is designed to produce the approximately sinusoidal distribution of AFDW .Firstly ,Fourier series expansions of a rectangu‐lar periodic function and a step periodic function are respectively done .It is found that the amplitude of each harmonic of the step periodic function is smaller than that of the rectangular periodic function , and accordingly a step structure of PM is put forward .Secondly ,finite element analysis models of the speed control of PMSMs with the step PM and with the tile‐type PM are respectively built and simula‐ted with magnetic field analysis software Magnet ,then harmonic components of AFDW obtained after simulation are analyzed .It is shown that the amplitude of each harmonic of AFDW produced by the step PM obviously becomes smaller compared with the tile‐type PM .