Different pulse voltage will give different affection on insulation life of variable fre -quency Ex motor .Give a suggestions to increase the insulation life combined with varies malfunc -tional phenomenons .%不同脉冲电压在不同试验情况下，对变频防爆电机绝缘寿命的影响不同，结合变频防爆电机故障现象，提出变频电机提高使用寿命应采取的措施。
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