As the maximum current is a very important characteristic in power system design, it may be necessary to examine other motor options if your motor’s maximum current is deemed too high by your power system design teammates. Fortunately, different motors that meet your power requirements may have different current draws when providing the same power. Below is an example of this. Both motors in the example assume the same efficiencies of the gear and motor, although in practice there may be slight differences based on the combination selected. The example only focuses on the operating point case. You can see in Figure 21 below that operating point is very close to the max operating voltage on the first potential motor’s torque-speed curve, but that same operating point is far below the max operating voltage on the second potential motor’s torque-speed curve as shown in Figure 22. The voltage and current requirement calculations for the two potential motor selections are shown below.
