The motor will not burn out if the inner temperature wouldn’t up to the inner insulation grade. For instance, inner insulation will not burn if the inner temperature is no more than 130°C (266°F), so a surface temperature of 70-90°C (158-194°F) is safe, which will not influence the motor’s service life.

Sometimes we get complaints from synchronous AC motor users that their’s motor does not work. We can not find the proper reason until we got a picture of her or his power source.