我厂一纺车间空调风机采用YR225M2-4型30kW绕线式电动机驱动。1994年9月的一天,空调风机突然停机,经检查发现电动机转子的集电环三相均已烧坏,严重的一相集电环竟烧蚀了厚度的一半以上。经解体仔细分析查明,电动机集电环烧坏是因电刷磨损过度,造成接触不良,最后引起电弧导电所致。经实测,将电动机 I plant a spinning workshop air conditioning fan using YR225M2-4 type 30kW wound motor drive. One day in September 1994, the air conditioner fan suddenly shut down. After examination, it was found that the three phases of the collector ring of the motor rotor had been burned out. A serious one of the collector rings actually ablated more than half of the thickness. After careful analysis of disintegration to identify, the motor collector ring burnout is due to excessive brush wear, resulting in poor contact, and finally caused by arc conduction. After measured, the motor