Research on Reliability of Aluminum Wire Motors of the Single-phase Constant Speed Compressor
Single-phase fixed-speed compressors for air conditioners usually employ the single-phase asynchronous motors by the copper enameled wires.However,in recent years,the sharp rise of copper prices is driving the manu-facturers to take the replacements of copper enameled wires by the cheaper aluminum enameled wires into account.But the aluminum enameled wire has much higher resistance than that of the copper enameled wire,which leads to high copper loss and serious heat generation.In addition,with high temperature coefficient of resistance and low thermal conductivity,aluminum undergoes from inefficient heat dis-sipation,which means aluminum wire motor runs at a high temperature and its electromagnetic reliability is low.Fur-thermore,in terms of mechanical properties,the enameled aluminum wire has low tensile strength and low elongation,which brings great challenges to the manufacturing process.Diving into single-phase asynchronous aluminum wire mo-tor used in air-conditioning compressors,this paper studies mechanism why aluminum enameled wire influences mo-tor performance regarding electromagnetic reliability and process reliability,as well as discusses how to improve the reliability.
air conditioning compressorsingle-phase asynchronous motoraluminum enameled wirereliability
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