Three kinds of novel permanent magnet synchronous motors (PMSM) integrated with heat pipe whose evaporator is treated in different ways for electric vehicle are designed in order to decrease the end winding temperature. The influence of the geometric parameter of the cooling water channel on the thermal–hydraulic performance is analyzed. The temperature difference between the cooling water and the housing decreases, while the pressure loss increases with the spiral number increasing. Channel width and channel height have little influence on the temperature difference but have an apparent effect on the pressure loss. FLUENT, CFD software, is used to simulate the heat dissipation performance of the PMSMs. The highest temperatures of the end winding are 149.9 °C, 140.1 °C, 133.5 °C, and 139.6 °C for the traditional PMSM and the three new PMSMs, respectively. The lowest temperatures of the lamination of the four PMSMs are close. So are the highest temperatures of the lamination. The lowest temperature distribution profiles of the housing of the three new PMSMs do not change apparently compared with that of the traditional PMSM. It shows that after the optimization of the cooling water channel, the cooling water system of the new PMSMs works efficiently although more heat is transferred to the housing. Among the traditional PMSM and the three new PMSMs, new PMSM b shows the best heat transfer capacity.

为了降低最终绕组温度，设计了三种与热管集成在一起的新型永磁同步电动机（PMSM），对电动机进行了不同方式的蒸发器处理。分析了冷却水通道的几何参数对热工水力性能的影响。冷却水和壳体之间的温差减小，而压力损失则随着螺旋数的增加而增加。通道宽度和通道高度对温差的影响很小，但对压力损失有明显的影响。CLU软件FLUENT用于模拟PMSM的散热性能。对于传统的PMSM和三个新的PMSM，端部绕组的最高温度分别为149.9°C，140.1°C，133.5°C和139.6°C，分别。四个PMSM的最低层压温度接近。层压板的最高温度也是如此。与传统的PMSM相比，三个新PMSM的外壳的最低温度分布轮廓没有明显变化。结果表明，在优化了冷却水通道之后，新的PMSM的冷却水系统可以有效地运行，尽管有更多的热量传递到了壳体上。在传统的PMSM和三个新的PMSM中，新的PMSM b显示出最佳的传热能力。结果表明，在优化了冷却水通道之后，新的PMSM的冷却水系统可以有效地运行，尽管有更多的热量传递到了壳体上。在传统的PMSM和三个新的PMSM中，新的PMSM b显示出最佳的传热能力。结果表明，在优化了冷却水通道之后，新的PMSM的冷却水系统可以有效地运行，尽管有更多的热量传递到了壳体上。在传统的PMSM和三个新的PMSM中，新的PMSM b显示出最佳的传热能力。