How does a brushless electric motor work?

Answer 1

The brush simply acts as a switch to turn the current on to the electromagnets at thew right time during rotation, and to turn it off again.

Brushless motors replace the brush with a reed switch or a hall-effect sensor to accomplish the very same task.

Advantage is that there is no brush to wear out, and no brush friction.

Answer 2

A brush less motor by definition does not have any brushes that contact the rotor ( the center or rotating part). The rotor must be magnetized to have a magnetic field to work against. Power is applied to the stator (outer field or stationary part) causing electromotive force which pushes against the permanent magnet of the stator. The speed is controlled by the frequency(for AC) and voltage (for DC).

Answer 3

it is just a coil of magnet wire (thats what i did in a project for the science fair it was an electric motor without a brush)
and it is charged with electricity and it will be set near some magnets where when the magnet wire coils are charged they will retract away from it and make the rotor spin

pretty cool huh

Answer 4

A "brushless DC motor" is essentially permanent magnet synchronous motor with a built-in shaft position sensor, driven by a special variable frequency drive. Firing of the transistor switches in the drive output are based on the speed, torque, and/or position signals as compared to the shaft position and speed feedback.

https://www.electrikals.com/products/rm-motors/havells?mid=28&cid=641&page=1&pagesize=20

Answer 5

Check out an Induction motor on Google etc...

Answer 6

http://en.wikipedia.org/wiki/Brushless_DC_electric_motor