描述
反向旋转的5次谐波磁势和正向旋转的7次谐波磁势都将感应出6倍于基波频率的转子电流,在基波频率为50Hz时,转子电流频率为300Hz。同样,第11次和第13次谐波感应出12倍于基波频率,即600HZ的转子电流。在这些频率下,转子的实际交流电阻远远大于直流电阻。转子电阻实际增大多少取决于导体截面和布置导体的转子槽的几何形状。通常的长宽比为4左右的铜导体,在50Hz时交流电阻与直流电阻之比为1.56,在300Hz时比值约为2.6;600Hz时比值约为3.7。频率更高时,此比值随频率的平方根成比例增加。
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①Allen-Bradley(美国AB)系列产品》
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③General electric(通用电气)系列产品》
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据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余(TMR)
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◆Motorola(摩托罗拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
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