Examine Feasibility Of The Selected External Heatsink; External Heatsink Selection - YASKAWA GA500 Series Installation Manual

■

Examine Feasibility of the Selected External Heatsink

When you select an external heatsink, if installation conditions, for example installation space,
limit your selection, use the formula to calculate the heatsink plate temperature and examine the
external heatsink.
If T value is lower than the maximum temperature of the heatsink, you can use the selected
HSP
external heatsink.
Monitor Heatsink Plate Temperature on page 10
Refer to
temperature.
◆

External Heatsink Selection

The examples show applicable heatsink selection for drive model 2006 when C6-01 = 1
[Normal / Heavy Duty Selection = Normal Duty Rating].
These are examples of calculations for the external heatsink from MIZUTANI ELECTRIC IND.
CO., LTD.
• Universal Type Heat Sink EF Series, EF (98) L:150 (thermal resistance Rθ
• Universal Type Heat Sink EK Series, EK (95) L:150 (thermal resistance Rθ
Symbol
P
Loss
T
HSP_max
T
Amb
Rθ
HSP
Rθ
HSP-EHS
YASKAWA TOEP C710617 0SA YASKAWA AC Drive GA500 Installation Manual
Table 8.1 External Heatsink Selection
25.0 W
90 °C (194 °F)
40 °C (104 °F)
0.05 K/W
H = 128 mm
A D = 68 mm
th
A = 0.7 × 0.128 m × 0.068 m = 6.1 × 10
th
2.0 W/(m∙K)
λ
Thermal conductivity of Oil-based compound X-23-7795 from Shin-Etsu
Comp
Chemical Co., Ltd.
100 μm
d
Comp
Recommended compound thickness (when applied)
8 External Heatsink Selection
to monitor drive heatsink plate
Value
-3 2
m
= 1.6 K/W)
EHS
= 1.1 K/W)
EHS
25