For example, shaded pole motors haven’t gone away, even though they’re terrible in every respect. But, try designing a BLDC motor with a microcontroller inside a $50 microwave oven to turn the ...

Somewhere in most engineering educations, there’s a class on induction motors. Students learn about shaded-pole motors, two-phase and three-phase motors, squirrel cage motors, and DC-excited motors.

In this single phase induction motor, ... The invention of the shaded-pole motor allowed self-starting clocks to be made, but since the clock would restart after a power interruption, the loss of time ...