Electric Motors

In short: An electric motor converts electrical energy into rotary motion.

In more detail: It works with magnetic fields: current through coils generates forces on a rotor.

In Depth

Designs

• DC motor: simple, formerly with brushes (wear out), today often brushless (BLDC).
• Induction motor: robust, widespread in industry.
• Permanent-magnet synchronous motor (PMSM): high efficiency, in many electric cars.

Advantages

Efficiency over 90 percent, full torque from standstill, little maintenance. Also used in fans (fans), hard drives and robots (robotics). See electric cars.

See also: Electric Cars, Fans, Microcontroller