Power Supply Sizing - Advanced Micro Controls Inc. SMD23E2 User Manual

SMD23E2 & SMD24E2 S
Torque and Power Curves (continued)

Power Supply Sizing

The power supply can be sized based on the power the motor must generate during its operation. As a general
guideline, your supply should be able to produce 150% to 175% of the power the motor can produce. The
power and torque curves on the previous page can be used to determine the maximum power the motor can
generate over its speed range.
Note that the power value that you should use is the maximum power value over the range of speeds that the
motor will be operated at. The power generated by the motor decreases towards the end of its usable speed.
Therefore, the power generated at your machine's operating point may be less than the maximum the motor
can generate at a lower speed.
An SMD23E2-130 will be running at a maximum of 7 RPS and a 48 Vdc supply will be used.
Example 1:
Based on the power curve in figure R1.7 on the previous page, the combinations will generate a
maximum of 40 Watts. Therefore a 48 Vdc supply with a power range of 60 W to 70 W can be
used in the application.
An SMD23E2-240 will be running at a maximum of 9 RPS and a 24 Vdc supply will be used.
Example 2:
Based on the power curve in figure R1.8 on the previous page, the power at this speed is 45 W, but
the maximum power over the entire speed range is 55 W, which occurs at 7 RPS. Therefore, the
55 Watt value should be used, and the 24 Vdc supply should be able to generate 83 W to 97 W.
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PECIFICATIONS
Figure R1.9 SMD24E2-350 Torque and Power Curves
SMD23E2 and SMD24E2 User's Manual
ADVANCED MICRO CONTROLS INC.