How to Calculate Motor Temperature Under Load: A Motion Control Classroom video

Welcome to Design World’s “How to Calculate” series … where you learn how to apply the most important equations for sizing, selecting, and comparing linear motion and motion control products. In this session, brought to you by ElectroCraft, we’ll learn how to calculate motor temperature under load.

[TheSilverSmitih]

I'm having trouble understanding the reasoning behind the calculation. If maximum allowable temperature is the sum of the ambient temperature, the temperature rise, and the safety margin, then does that mean increasing the ambient temperature of my motor's environment will increase the maximum allowable temperature of the motor winding insulation?

For a class A motor operating in a 40°C ambient temperature, the maximum allowable temperature is 105°C.

But, if my class A motor is operating in a 100°C environment, the temperature rise is 60°C, and the temperature margin is 5°C, then would my maximum allowable temperature be 165°C?

Intuitively it doesn't make sense to me that increasing the ambient temperature would increase the maximum allowable temperature. I'd be grateful if you could explain this to me.