exciter commutator
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而直流机换向器火花问题一直是一个难题，现就我厂3号机组励磁机换向器火花产生的原因进行分析，并对此提出整改方案，以促进安全发电与运行。
The reason of spark in commutator was analyzed in this paper. In order to ensure safety generation and theration, th e improving measurement was raised.
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