Applied Motion STM17C-3CE - Manual (Page 10)

Current Selection
The maximum supply currents required by the STM17 are shown in the charts below at different power supply voltage
inputs. The STM17 power supply current is lower than the winding currents because it uses switching amplifiers to con-
vert a high voltage and low current into lower voltage and higher current. The more the power supply voltage exceeds
the motor voltage, the less current will be required from the power supply.
It is important to note that the current draw is significantly different at higher speeds depending on the torque load to
the motor. Estimating how much current is necessary may require a good analysis of the load the motor will encounter.
Note: all curves were measured at 20,000 steps/rev, 1.8A motor current, maximum torque load
0.6
0.8
1.0
1.2
up
pl
y
C
ur
re
nt
A
)
STM17X-1
12V 24V 48V
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0 10 20 30 40 50
M
ax
S
up
pl
y
C
ur
re
nt
(A
)
rps
STM17X-1
12V 24V 48V
10
STM17 Hardware Manual
920-0034 rev A
9/30/2010