Temperature Rise

The temperature rise of a motor is due to the difference between the

absorbed power and the output power of the motor. This difference is

the power loss.

Temperature rise is also related to the fact that power loss, in the form

of heat from the motor, is not rapidly absorbed by the ambient air

(thermal resistance). The thermal resistance of the motor can be greatly

reduced by ventilation.

Important

The nominal operating characteristics correspond to the voltagetorque-

speed characteristics required for continuous operation at

an ambient temperature of 20˚ C. Only intermittent duty is possible

outside these operating conditions : without exception, all checks

concerning extreme operating conditions must be performed in

the actual customer application conditions in order to ensure safe

operation.