The motor calculations presented here apply to changing conditions of a blower motor when pulley adjustments are made. However, these calculations are useful wherever electric motors are used. These simple calculations can be used to solve motor installation and troubleshooting problems in a variety of applications. These motor formulas and related information are also basic to understanding energy consumption, power consumption by motor-driven devices, and the motor side of performing energy audits.
Fundamental to these useful calculations is some understanding of the information contained on a motor data plate.