Where Is The Temperature High Point Of The Enclosed Motor Windings?

Where is the temperature high point of the enclosed motor windings?

As opposed to radially ventilated and axially ventilated construction motors. Enclosed motor winding heat dissipation path is radially outward through the core to the seat, that is, the use of direct contact for heat conduction, for this reason, the motor seat and the core of the coordination is very important, in the motor production and processing process should be avoided due to deformation of the seat or the size does not meet the requirements of the heat dissipation of bad, at the same time through the number of heat dissipation tendons and heat dissipation area to ensure that the heat conduction effect, including the increase of the outside of the fan to reduce the surface temperature of the seat, improve the heat dissipation effect. At the same time, the heat conduction effect should be ensured by the number of heat dissipation rib and heat dissipation area of the chassis, including the addition of external fan to reduce the surface temperature of the chassis and improve the heat dissipation effect.

Compared with the middle of the winding, the two ends of the winding are in a non-contact condition, and the heat needs to be conducted outward in an indirect way, so the temperature distribution of the winding of this type of motor shows a high distribution at the two ends and a low distribution in the middle. For this type of motor, if the winding end is too full, especially for low-voltage high-power motors, in the end of the space is particularly tight, the end of the processing, protection is particularly important, especially for the 2-pole motors, the winding end will become the electrical faults in the band.

When the motor core adopts laminated segmented structure, due to the advantage of radial heat conduction effect, it can ensure that the overall core temperature is basically in the temperature equalization state.

This ventilated structure of the motor also has a characteristic, because of its heat dissipation path is mainly through the radial effect, and thus will be formed in the radial direction of the objective fact that the inner high and the outer low, when the motor surface for the temperature rise, the temperature inside the motor will be a lot higher, in addition to the stator windings may lead to a very high temperature of the rotor, and in serious cases, there is a serious rotor due to severe heat and the bluing of the serious consequences.