【作者】 焦峰； 张志军；

【Author】 JIAO Feng;ZHANG Zhijun;School of Mechanical Engineering and Automation, Northeastern University;

【机构】 东北大学机械工程与自动化学院；

【摘要】 针对驱动电机结构紧凑、发热量大、散热困难的特点,本文以某一型号的永磁同步电机为研究对象,借助motor-cad软件采用磁热耦合的方法对冷却方式为水冷的驱动电机进行了损耗、温度场仿真计算。得到了额定工况下电机内部的温度分布规律,并且对不同的冷却方式效果进行分析与比较,得出三种冷却方式螺旋机壳、轴向机壳、湿转子冷却所需最小冷却剂流量分别为6.5l/min、4.8l/min以及0.9l/min,冷却剂流量在0-1l/min变化时,湿转子冷却方式冷却速率最为高效;随着流量的增大,三种冷却方式冷却速率都变小并逐渐趋于0;最后研究分析了冷却剂入口温度及冷却剂种类对电机冷却效果的影响,得出水的冷却效果最佳,在一定范围内冷却剂入口温度变化率与电机内部温升近似成正比关系。更多还原

【Abstract】 In view of the characteristics of compact structure, high heat output and difficult heat dissipation of the drive motor. This paper takes a certain type of permanent magnet synchronous motor as the research object. With the help of motor-CAD software, the loss and temperature field of the drive motor with water cooling are simulated by means of magneto-thermal coupling. The temperature distribution law inside the motor under rated working condition is obtained. And the effects of different cooling methods are analyzed and compared,It is concluded that the minimum coolant flow required by the three cooling modes of spiral housing, axial housing and wet rotor is 6.5 L/min, 4.8 L/min and 0.9 L/min, respectively. When the coolant flow rate is 0-1L/min, the cooling rate of wet rotor is the most efficient. With the increase of the flow rate, the cooling rate of the three cooling modes decreases and gradually approaches 0; Finally, the influence of coolant inlet temperature and coolant type on motor cooling effect is studied and analyzed, it is concluded that the cooling effect of water is the best, and the temperature change rate of coolant inlet is approximately proportional to the temperature rise inside the motor within a certain range.更多还原