OEM650/OEM650X • INSTALLATION
31
Sizing Power Supply
Table 2-14 contains power ratings to help system designers size a
power supply. Combinations of motors and current levels other than
those shown may result in power values that are not recommended.
Connection
OEM57 motors may be configured in parallel or series. OEM83
motors must be wired in parallel. Refer to the OEM650 Quick Test.
Motor Size
Motor
Motor Heat +
Drive
Supply
(@75VDC)
Current
Avg. Shaft Power
Heat
Total**
OEM57-40-MOS
2.65A
56 Watts
9 Watts
65 Watts
OEM57-40-MOP
5.3A
56 Watts
19 Watts
75 Watts
OEM57-51-MOS
3.3A
75 Watts
11 Watts
86 Watts
OEM57-51-MOP
6.6A
75 Watts
25 Watts
100 Watts
OEM57-83-MOS
3.8A
86 Watts
13 Watts
99 Watts
OEM57-83-MOP
7.5A
86 Watts
31 Watts
117 Watts
OEM83-62-MO*
4.4A
113 Watts
15 Watts
128 Watts
OEM83-93-MO*
5.6A
133 Watts
20 Watts
153 Watts
OEM83-135-MO*
6.9A
155 Watts
27 Watts
182 Watts
S: Series Configuration P: Parallel Configuration
* 34 size motors are internal wired in Parallel ** User must supply this level of wattage
Table 2-14. Power Sizing
Use the following equation to determine drive heat.
Drive Heat (Watts) = (0.31) (I
M
2
) + (1.13 I
M
) + 3 I
M
=
Motor Current
Calculations
❏
To convert watts to horsepower,
divide by 746
❏
To convert watts to BTU/hour,
multiply by 3.413
❏
To convert watts to BTU/minute,
multiply by 0.0569
Motor Type
OEM650/OEM650X motors are custom-made for use with these
drives and drive/indexers. They are not available as a standard
model from any other manufacturer. These motors are designed for
low loss at rest and at high speed. Motors in the same frame size
from other manufacturers may sustain considerably higher iron
losses than an OEM650/OEM650X motor. OEM motors are wound
to render inductances within a range suitable for OEM Series prod-
ucts. If you do not use an OEM Series motor, you should consult
Compumotor's Applications Engineering Department for assistance
(800-358-9070). OEM650s/OEM650Xs are designed to run 2-phase
PM step motors only. Do not use variable reluctance or DC motors.