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非正弦供电十五相感应电机的电动势计算

, PP. 129-137

Keywords: 感应电机,非正弦供电,常规磁动势,拓展分布磁路法,感应电动势

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Abstract:

非正弦供电十五相感应电机基波磁动势正幅值与3次谐波磁动势负幅值不在同一位置时的叠加磁动势波形称为常规磁动势波形,此种情况下感应电动势的计算是该种电机电磁性能分析与优化设计的前提。与正弦磁动势或理想叠加磁动势不同,常规磁动势下电机的感应电动势与激磁电流相位因磁路饱和不再相差π/2,为此提出把感应电动势作为激磁电流流控电压源的处理方法。鉴于电机每半个极下气隙磁密波形不再相同的情况,提出基于电机1个极距区域的拓展分布磁路法计算气隙磁密,进而求出基波感应电动势与3次谐波感应电动势。非正弦供电十五相感应电机样机的感应电动势计算值与实测值相互吻合,说明了拓展分布磁路法计算感应电动势有效且具有较高的准确度。

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