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电机的温升限值和轴承温度

2024-09-06

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电机绕组根据绝缘材料最高允许的工作温度划分的耐热等级(热分级)一般分为七个不同等级。

温度每增加8℃,使用寿命降低一半,以A级为例,95℃是使用寿命为20年,103℃时为10年,121℃时为5年

温升:顾名思义,就是温度的升高,其参照物是环境温度。

对电机而言,就是电机在额定运行状态下达到热稳定时,定子绕组的温度高出环境温度的数值,单位:开尔文(K)。

温升限值:也就是温升的限定值,是根据标准所规定的环境最高温度以及电机所采用的绝缘材料等级所允许的极限工作温度,再留出一定的发热余量确定的。

电机的轴承温度是指在额定运行状态下达到热稳定时,电机轴承所允许的最高工作温度,单位:℃。

(来源:南京控特电机股份有限公司)

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