EC Motors work when two magnetic fields, one created by the rotor and one by the stator, push on each other. The way these fields are created and controlled vary by motor type:
● EC motors use permanent magnets to create the rotor field and coils electronically controlled by a commutator to create the stator field.
● Brushed DC motors use coils powered by the DC input voltage and controlled by mechanical contacts, or brushes, to create the rotor field. Permanent magnets create the stator field.
● Induction motors use coils powered and controlled by the AC input voltage to create the stator field. The rotor field is then created electromagnetically by the stator field.
EC motors do not have brushes and therefore avoiding the sparking and short lifespan of brushed motors. With electronics controlling the stator and no power lost inducing the rotor field, EC motors offer better performance, are easier to control, and run cooler than (small) induction motors. When high motor efficiency, reliability, and/or controllability is desired in fractional-horsepower applications, EC motors are often employed.