Distribution of motor temperature in different structures
In the calculation of the temperature rise of the motor, the most important thing is to calculate the temperature rise of the winding and the core. These components are both heat-conducting media, which are distributed heat sources. Their temperature is generally spatially distributed according to a certain rule, so that there is a maximum temperature rise and an average temperature rise. Although the heating limit of each part of the motor should be based on the highest temperature rise, in the calculation, as a whole, it is usually only possible to calculate the average temperature rise of the heat-generating component. There is a certain regularity between the average temperature rise and the highest temperature rise. The temperature of the motor can also be measured by the average temperature rise. Ms. References today briefly describe the temperature distribution of several typical structural motors.
Temperature distribution of motors with different structures
●The temperature distribution of the stator windings in the axial direction of the motor with symmetrical radial ventilation system
With this type of ventilation system, the amount of air passing through each radial air duct is substantially the same. At this point, the maximum temperature of the winding and the core occurs in the middle of the motor. The middle part of the stator winding is converted into heat by copper (aluminum) consumption, part of which is dissipated into the air through the core and the air passage, and the other part is conducted along the winding to both ends and is dispersed from the end of the winding into the air. In a class of motors where the effective length is not long, the heat dissipation at the ends plays a significant role in cooling the windings.
●The axial distribution of the stator windings in the axial ventilation system or the hybrid ventilation system
In general, when such an asymmetrical ventilation system is used, the temperature distribution of the stator winding and the core, the position at which the highest temperature occurs, is moved from the middle of the symmetrical ventilation system to the exit of the hot air escape motor.
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