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... can be improved and the power loss of the motor can be reduced. It can also reduce the noise and vibration generated during the operation of the motor, and improve the smooth operation and reliability of the motor [14][15][16]. The basic parameters are shown in Table 1 below. The established finite element simulation of the 2D motor is shown in Fig. 1. The hairpin winding structure is shown in Fig. 2. ...
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... from Fig. 9, under the same conditions, the heat dissipation capacity of the double-layer tank water jacket is significantly better than that of the commonly used single-layer tank water jacket, and the maximum temperature is reduced by 23.8°C. The maximum temperature is reduced by 37°C compared to natural ventilation cooling. As can be seen in Fig. 10, there is a temperature difference between the upper and lower windings. The heat dissipation conditions of the windings close to the teeth of the stator core are better than those close to the yoke of the stator core. Therefore, the temperature of the winding close to the tooth part of the stator core is low, and the end temperature ...
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... of the windings close to the teeth of the stator core are better than those close to the yoke of the stator core. Therefore, the temperature of the winding close to the tooth part of the stator core is low, and the end temperature is higher because the end winding is seriously heated and the heat dissipation conditions are poor. As can be seen in Fig. 11, the overall temperature difference of the permanent magnet is not large. Due to the presence of an air gap, the radial heat dissipation of the permanent magnet is less, and there is a certain amount of convective heat transfer at the end, so the temperature near the stator end is high and the outside temperature is ...
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... the temperature distribution map in Fig. 9 that there is also a certain difference in the heat dissipation uniformity of the two water jackets. In order to facilitate the analysis, the temperature distribution contour of the shaft/diameter section of the hub motor and the temperature variation curve along the shaft were intercepted, as shown in Figs. 12 and 13, respectively. As can be seen from Fig. 12, the temperature of the motor is inconsistent at the inlet and outlet of the single-layer water jacket. This indicates that the side of the jacket near the inlet dissipates heat better than the side near the outlet. This is due to the absorption of water in the water jacket and the absorption ...
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... is also a certain difference in the heat dissipation uniformity of the two water jackets. In order to facilitate the analysis, the temperature distribution contour of the shaft/diameter section of the hub motor and the temperature variation curve along the shaft were intercepted, as shown in Figs. 12 and 13, respectively. As can be seen from Fig. 12, the temperature of the motor is inconsistent at the inlet and outlet of the single-layer water jacket. This indicates that the side of the jacket near the inlet dissipates heat better than the side near the outlet. This is due to the absorption of water in the water jacket and the absorption of part of the heat generated by the ...
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... dissipation capacity. From the perspective of heat transfer, because the winding is close to the inner wall of the water jacket, the heat dissipation effect of the water jacket on the winding is better. The end windings accumulate largely, so the temperature gradient along the axial direction of the windings is larger. It can also be seen from Fig. 12 that the temperature distribution of the hub motors of the two water jackets is along the axial direction. On the side of the water inlet, the temperature difference of the motor is only 0.5°C∼1°C, while the temperature difference on the side of the water outlet is 4°C∼5°C. This shows that the doublelayer cooling water jacket can make ...
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... can be seen from the radial temperature variation diagram in Fig. 13. The overall temperature distribution of the hub motor with a double-layer water jacket is relatively uniform, which is determined by the symmetry of the structure. It can also be seen from Fig. 13 that the temperature difference between the two water jackets along the radial direction gradually increases, and the temperature ...
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... can be seen from the radial temperature variation diagram in Fig. 13. The overall temperature distribution of the hub motor with a double-layer water jacket is relatively uniform, which is determined by the symmetry of the structure. It can also be seen from Fig. 13 that the temperature difference between the two water jackets along the radial direction gradually increases, and the temperature difference increases from 1°C∼2°C close to the water jacket to 7°C∼9°C inside, indicating that the cooling water jacket in the double-layer tank has stronger heat dissipation ability for each component ...
