
10.HEAT DISSIPATION SVM B-65322EN/02
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10 HEAT DISSIPATION
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]
SVM1-4i
H001 20 Ka1: 8.1
SVM1-20i
H002 20 Ka1: 7.7
SVM1-40i
H003 20 Ka1: 7.1
SVM1-80i
H004 20 Ka1: 6.7
(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 Specification
a
[W]
K
[W/Arms]
SVM1-4i
H001 20 Kb1: 8.1
SVM1-20i
H102 20 Kb1: 7.7
SVM1-40i
H003 20 Kb1: 1.4
SVM1-80i
H004 20 Kb1: 0.7