Thermal Time constant of motor
I am looking some information about Thermal Time constant of Kollmorgen motors.
I find the white paper "Kollmorgen Managing Servo Motor Overloads WhitePaper.pdf" which is very interesting..
But when I look some figures in detail, I am slightly at a loss...
Take for example a AKM41E :
On the Motor database of the S300/S700 (mdb46) , we see a Thermal Time constant of 20 sec
On the Workbench, we see a value for the Coil Thermal time constant of 5,436 mHz..
Even with the formulae Coil Termal Constant in mHz = 1000 / (2*PI*(Thermal Time constant in sec)/30.0)) , I don't see any coincidence between these 2 figures...
In fact, for an application, I need 22 Nm rms during 2 minutes, then 18 Nm during 1 minutes, and the motor is disabled during 15 minutes.
I try to see if a Cartdridge C052D with 16.9 Nm in nominal torque could sustain such a cycle...
Thanks for your help.