
6.HEAT DISSIPATION B-65282EN/05
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6.1.2 Servo Amplifier Module
The amount of heat dissipation by the SVM 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 by the SVM is calculated
according to the following expression:
Total amount of heat dissipation
= a + Ka1 × b1 + Ka2 × b2 + Ka3 × b3
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]
Ka2 : Coefficient determined by the SVM [W/Arms]
b2 : Current flowing through the servo motor [Arms]
Ka3 : Coefficient determined by the SVM [W/Arms]
b3 : Current flowing through the servo motor [Arms]
SVM 1-axis (Total amount of heat dissipation)
Name Specification
a
[W]
K
[W/Arms]
SVM1-20i
H103 13 Ka1: 5.0
SVM1-40i
H104 13 Ka1: 4.6
SVM1-80i
H105 13 Ka1: 4.3
SVM1-160i
H106 17 Ka1: 4.7
SVM1-360i
H109 25 Ka1: 4.9