My motor gets extremely hot - is that a risk?

When carefully touching the motor with your hand, please keep in mind that we normally back away immediately from a temperature of approx. 60°C and do not want to touch the surface any longer. Therefore, for a reliable indication, the measurement with a surface thermometer is safer and more suitable.

When our servo motors are used to their full capacity, temperatures of approx. 100°C may well occur on the motor surface, as the servo motors' insulating material system is designed for a continuous temperature of up to 180°C. In addition, the motors have temperature sensors which, when correctly evaluated in the inverter, provide protection against overtemperature in the event of slow temperature changes.

These temperature sensors cannot follow extremely fast temperature rises (for example, due to a high current input over a longer period – e. g. motor is blocked). The reason for this is the less-than-ideal thermal coupling between the motor winding and the temperature sensor. To protect against such events, i²xt monitoring is usually provided in the inverter.