
B-65292EN/03 APPENDIX C.COOLING CONDITION
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C COOLING CONDITION
IC code
IC code means "International Cooling" and it indicates the cooling
system for a motor standardized in IEC34-6.
All FANUC's built-in AC spindle motors are developed under
IC9U7A7 and this means all motors require separated oil cooling
system. We have not recommended other cooling systems.
Actual calorie must be removed
You can calculate easily the actual calories that must be removed
from the built-in motor according to the formula below using data
shown in "I. SPECIFICATIONS". All data are got in the examinations
based on IEC34 using the recommended cooling jacket .
Removed calories Q(W)=
{Coolant temperature rise(K)}×{Flow rate(l/min.)}×{Specific heat(J/gK)}×{Density(g/cm
3
)}×1000
60
Capacity of cooler
Actual calories that must be removed can be calculated easily. But
required minimum capacity of cooler will be different from this, as
there are some heat diffusion to the environment and some heat
production in the other parts used in the cooling system and in the
spindle. Therefore considering safety,
Capacity of cooler =
Calculated calories+Produced calories in other parts
(You can deduct the calories if you know the diffusion to the
environment.)
is preferable.
Coolant temperature setting
Physically, more calories can be removed if the coolant temperature is
set lower. But the lower coolant temperature will cause condensation
in or on the motor, and it will affect the motor life. Therefore,
basically, set the coolant temperature higher than the room
temperature.