Rockwell Automation 8510 AC Spindle Drive System User Manual - Manual (Page 52)

Drive Installation
Chapter 5
5-48
Heat Dissipation The drive must always be mounted in a sealed metal enclosure with the
heat sinks extending through the enclosure wall, or by using the optional
panel mounting brackets (with the heat sinks completely inside the
enclosure). In either case the enclosure must be sized to provide adequate
surface area to allow the heat generated inside the enclosure (by the drive
and other devices) to be dissipated through convection cooling. If this is
not possible, a properly rated enclosure cooling unit must be added to cool
the enclosure.
Typically a nonventilated convection cooled enclosure should be sized such
that 10 watts of power are dissipated for each 1 square foot of enclosure
surface. This area should not include the enclosure bottom or surfaces of
the enclosure mounted against a wall. If smaller enclosures are desired, an
air conditioner or an air to air heat exchanger may be required.
The heat dissipated inside the enclosure is directly related to the power that
is being delivered to the motor. The following table gives the drive thermal
dissipation for different motor power ratings.
Important: For very heavy regenerative load applications, the heat
dissipated inside the enclosure for panel mounted drives may increase by
up to 15%.
Table 5.A
Watts Dissipated Inside Enclosure
Motor Power
Rating
kW / HP
2.2 / 3
3.7 / 5
5.5 / 7.5
7.5 / 10
11 / 15
15 / 20
18.5 / 25
22 / 30
Enclosure
Wall
Mounted
100 W
115 W
135 W
150 W
180 W
200 W
230 W
260 W
Panel
Mounted
290 W
430 W
610 W
720 W
970 W
1110 W
1360 W
1380 W