Any electrical motor, from an idealized viewpoint, consists of two sets of magnets—one set stationary, one set free to move—placed in special geometric relation to one another. For most ...

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 ...

DSPs more than double induction motor operating efficiency from 40% (typical of microcontroller-based solutions) to as high as 90% by injecting energy into stator at more optimum times.

Appliances such as refrigerators and space-heating and -cooling equipment for buildings and homes account for a large slice of U.S. electricity consumption. More-sophisticated appliance controls ...

Fig. 2. Four types of bearing currents can flow through this inverter-powered motor. Fig. 2 above shows an inverter-driven motor system with the inverter connected to the motor through a shielded ...