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DESCRIPTION DESIGN DATE
EDIT
FANUC SERVO AMPLIFIER
βi series DESCRIPTIONS
B-65322EN/02-02
13. Heat disspaton
The amount of heat dissipation depends on the SVM model and the current that flows
through the servo motor. For the current that flows through a servo motor, reference the
continuous rated current of each servo motor. (For the continuous rated current of each
servo motor, refer to the servo motor descriptions.) As the current that flows through a servo
motor, the root-mean-square value of the current that flows through an actual servo motor on
a machine can be used. The amount of heat dissipation indicated below assumes the use of
HRV2.
(1) Total amount of heat dissipation
The total amount of heat dissipation is calculated
according to the following expression:
Total amount of heat dissipation= a + Ka1 × b1
a: Amount of heat dissipation determined by the SVM
model [W]
Ka1: Coefficient determined by the SVM [W/Arms]
b1: Current flowing through the servo motor [Arms]
Total amount of heat dissipation
Name Specification
a
[W]
K
[W/Arms]
SVM1-10HVi
H001 20 Ka1: 10.8
SVM1-20HVi
H002 20 Ka1: 11.1
SVM1-40HVi
H003 20 Ka1: 11.1
(2) Residual amount of heat in the cabinet
By placing the heat sink section outside the cabinet, the
residual amount of heat in the cabinet can be calculated
according to the expression below.
Residual amount of heat in the cabinet= a + Kb1 × b1
a: Amount of heat dissipation determined by the SVM
model [W]
Kb1: Coefficient determined by the SVM [W/Arms]
b1: Current flowing through the servo motor [Arms]
Residual amount of heat in the cabinet
Name
Specificatio
n
a
[W]
K
[W/Arms]
SVM1-10HVi
H001 20 Ka1: 2.2
SVM1-20HVi
H002 20 Ka1: 2.2
SVM1-40HVi
H003 20 Ka1: 1.1