三相異步電動機Y-Δ降壓啟動電路另類故障分析
張子善，朱澤勝，劉洪志
(中國人民解放軍96625部隊，河北 宣化 075100)
摘 要：介紹了三相異步電動機Y-Δ降壓啟動電路中，當接觸器和時間繼電器額定電壓不完全一致時，可能出現接觸器振動吸合和時間繼電器提前開始計時的另類故障現象，分析了故障產生原因，通過對控制電路進行修正，切斷了導致故障產生的“提前通路”，保證了Y-Δ轉換功能正常。此方法對其他Y-Δ降壓啟動電路類似故障的解決均有借鑒意義。
關鍵詞：三相異步電動機；Y-Δ降壓啟動；故障；提前通路
中圖分類號：TM343+.2 文獻標識碼：A 文章編號：1007-3175(2014)03-0031-03
Offbeat Fault Analysis of Y-Δ Reduced Voltage Starting Circuit in Three-Phase Asynchronous Motor
ZHANG Zi-shan, ZHU Ze-sheng, LIU Hong-zhi
（Troops of 96625 PLA, Xuanhua 075100, China）
Abstract: Introduction was made to that in Y-Δ reduced voltage starting circuits of three-phase asynchronous motors, the offbeat fault of contactor vibrating making took place and time relays counted ahead of time when the rated voltage of contactors were not in uniform with that of time relays. The faults causes were analyzed, the control circuit was modified and the path ahead of time
was cut off to ensure Y-Δ transferring in normal function. This method is a reference for similar faults of other Y-Δ reduced voltage starting circuits.
Key words: three-phase asynchronous motor; Y-Δ reduced voltage starting circuit; fault; early circuit path
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