关键词: 负离子, 累积电压, 无刷直流电机, 放电路径, 评价方法

Abstract: Anion generators are increasingly widely used in air conditioning due to their excellent characteristics of purifying air by emitting anion. Anion accumulate on the inner unit components of the air conditioner, and when the accumulated voltage reaches a certain level, it poses a great risk of damage to the brushless DC motor chip. Taking a " healthy air conditioner" with anion generator as the research object, based on the structural comparison, it was found that the root cause of poor and abnormal motor chips was anion generators position. Through the discharge excitation test of anion on the motor, it was explored that accumulated anion voltage was transmit to the motor through the shaft extension to damage the chip. A discharge path of anion accumulation voltage was established through the shaft-rotor silicon steelmagnet-chip pin. Establish an evaluation method of the impact for anion to motor chips, which can effectively identify the risks of anion to brushless DC motor chips for new product development.

Key words: anion,accumulated voltage, brushless DC motor, discharge path, evaluation method