How to determine temperature rise stability and thermal stability?

    Temperature stability and thermal stability are actually the same thing. For the motor, when the temperature change does not exceed 2 ℃ within 1 h after the motor has been operated under the specified conditions for a certain time, the temperature rise of the motor is said to be stable, and the heating state of the motor is called thermal stable state.

    How long does it take for a general motor to reach thermal stability?

    For large motor and 4-pole system, the working period is usually longer.

    What is the relationship between the insulation grade of insulating material and the temperature rise limit of motor?

    The temperature that different grades of insulation materials can bear (the temperature that can make the service life longer) what is the difference between different grades of motor insulation materials and the temperature rise limit of motor are shown in the table below.