Applied Motion STM23C-3CE - Manual (Page 9)

Choosing a Power Supply
When choosing a power supply, there are many things to consider. If you are manufacturing
equipment that will be sold to others, you probably want a supply with all the safety agency approvals. If size and
weight are an issue use a switching supply.
You must also decide what size of power supply (in terms of voltage and current) is needed for your application.
Voltage
The STM23 series drives are designed to give optimum performance between 24 and 48 volts DC. Choosing the
voltage depends on the performance needed and Motor+Drive heating that is acceptable and/or does not cause
a drive over-temperature. Higher voltages will give higher speed performance but will cause the Motor+Drive to
operate at higher temperatures. Using power supplies with voltage outputs that are near the drive maximum may
reduce the operational duty-cycle significantly. See the chart below to determine thermal performance at different
power supply voltages
If you choose an unregulated power supply, make sure the no load voltage of the supply
does not exceed the drive’s maximum input voltage specification.
STM23-3 Max Duty cycle vs Speed
5 Amps @Ambient of 40°C
Mounted to a 6.4" x 6.4" x .25" Aluminum Plate
0
20
40
60
80
100
0 10 20 30 40 50
Speed (RPS)
%
D
u
ty
C
y
c
le
12V Duty Cy c le
24V Duty Cy c le
48V Duty Cy c le
65V Duty Cy c le
STM23-2 Max Duty cycle vs Speed
5 Amps @Ambient of 40°C
Mounted to a 6.4" x 6.4" x .25" Aluminum Plate
0
20
40
60
80
100
0 10 20 30 40 50
Speed (RPS)
%
D
ut
y
Cy
cl
e
12V Duty Cy c le
24V Duty Cy c le
48V Duty Cy c le
65V Duty Cy c le
9
STM23 Hardware Manual
920-0021F
2/14/2012