Table of Contents
Advertisement
9 Conditions of Acceptability
■
Select External Heatsink by Thermal Resistance
Replace the value of
Resistance on page
The thermal resistance of the external heatsink "EF(98) L: 150" is 1.6 K/W, so you can use
it. Yaskawa recommends the external heatsink "EK (95) L: 150" to prevent overheat if
there is a temporary temperature increase or a decrease in the cooling capacity of the
external heatsink because of dust and unwanted material.
■
Examine Feasibility of the Selected External Heatsink
The thermal resistance of the external heatsink "EF (98) L: 150" is 1.6 K/W. You can use
the formula to calculate the heatsink plate temperature.
The temperature of the heatsink plate is lower than the maximum value of 90 °C, so you
can use it. Because the thermal transfer area is 70% of the drive mounting area, and the
environmental conditions can change because dust and unwanted material can decrease
the cooling capacity of the external heatsink, Yaskawa recommends "EK (95) L: 150"
heatsink to achieve Rθ
9
Conditions of Acceptability
Machines and devices integrated with this product must satisfy the following conditions
for compliance with UL standards.
Refer to the manuals packaged with the drive for additional UL compliance requirements.
1.
Install finless-type drives into a ventilated enclosure with a minimum enclosure
volume shown in
30
Table 8.1
into the formula in
28.
= 1.1 K/W (T
EHS
Table
9.1.
Table 9.1 Minimum Enclosure Volume
Model
B001 - B006
2001 - 2012
B010 - B012
2018 - 2042
4001 - 4023
2056 - 2070
4031, 4038
YASKAWA TOEP C710617 0SB YASKAWA AC Drive GA500 Installation Manual
Select External Heatsink by Thermal
= 68.95 °C).
HSP
Minimum Volume
cm
3
(in
3
)
9850
(600)
15750
(960)
42000
(2560)
Advertisement
Table of Contents
