Illustration of a six-pole stator. One way an hvacr service tech can determine that s/he is making good motor replacement decisions in the field is to understand the concept of motor speed so that the ...

Speed Control of Motors Speed, torque, and horsepower are three inter-related parameters in motor control. The speed of a motor, measured in revolutions per minute (rpm), defines a motor's ability to ...

Variable-speed drives are a powerful yet underused tool for boosting energy efficiency, reducing emissions, and optimizing ...

Learning Outcomes Understand how to specify the proper AC or DC motor for a machine design. Integrate the motor to a machine, based on analysis of motor equations for voltage, current, torque and ...

A two-speed DC motor utilizing a dual armature winding has been developed as an improved solution to fan speed control with respect to cost, reliability, power conversion efficiency, electro-magnetic ...