E-4
Specifications
Power Dissipation
The OMNIDRIVE controller dissipates power that results in cabinet heating. The following table lists
power dissipation values for the OMNIDRIVEs. Calculate the cabinet cooling requirements using the
power dissipation information and formulas below.
Maximum power losses are shown to help size a NEMA 12 or equivalent enclosure and to ensure the
required ventilation. Typical power losses are about one-half maximum power losses.
When sizing an enclosure with no active method of heat dissipation, the following equation approximates
the size of enclosure necessary:
T
F
= 4.08 * (Q/A) + 1.1 where:
T
F
= Temperature difference between inside air and outside ambient (
°
F)
Q = Heat generated in enclosure (watts)
A = Enclosure surface area in ft
2
= (2dw + 2dh + 2wh) / 144
d = Depth in inches
h = Height in inches
w = Width in inches
Bus Capacitance
(
µ
F)
1170
1950
2730
Peak Power Output
b
(kWatts @ 120 V
rms
)
(kWatts @ 240 V
rms
)
0.9
1.8
1.3
2.7
2.7
5.5
Continuous Power Output
b
(kWatts @ 120 V
rms
)
(kWatts @ 240 V
rms
)
0.3
0.6
0.6
1.2
1.2
2.5
a. Bus capacitance energy absorption is based on the following equations:
b. Power outputs are based on the following equation:
Current as % of
Rated Continuous
Current
ODM-005,
ODM-005i
ODM-010,
ODM-010i
ODM-020,
ODM-020i
100
48 W
48 W
50W
NOTE
: These values do not include external shunt regulator power (regenerated power).
T
ABLE
E.1
OMNIDRIVE Power Ratings
(continued)
ODM-005,
ODM-005i
ODM-010,
ODM-010i
ODM-020,
ODM-020i
ε
1
2
---
C V
2
f
(
)
1
2
---
C V
2
i
(
)
–
=
ε
1
2
---
C
420
(
)
2
1
2
---
C
325
(
)
2
–
=
1
2
---
C
420
2
325
2
–
(
)
⋅
C
35387
(
)
=
if C = 17 x 470uF
,
ε
282
=
Output Power (in kWatts)
3
2
---
0.85
(
)
(input rms Volts)(output Amps)
=
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