HEIDENHAIN MANUALPLUS 620 - Page 974

974 HEIDENHAIN Technical Manual MANUALplus 620
First-order temperature model of the motor
 P: Heat output of the three phases
 KTY: KTY temperature sensor in the winding
 C
th2
: Thermal capacity of the motor housing
 R
th2
: Thermal resistance on the motor housing
 T
th2
: Thermal time constant R
th2
· C
th2
R
th2
KTY
C
th2
P