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Speed controller is a device that regulates the amount of power that goes to the electric motor.

The electronic speed controller also known as ESC interprets signals from the receiver and works to provide variation in motor speed and direction and may act as a braking mechanism. There are electronic speed controls for brushed and brushless motors.

If your RC is not equipped with an electronic speed controller and you want to add one, the general considerations are:

* Brushed or Brushless depending on your motor.
* Current rating that is higher than what your motor can pull (to avoid overheating).
* Voltage rating that is at least equal to or higher than the voltage of your battery.
* Low Voltage Cutoff is a feature on some electronic speed controllers that prevents damage to your battery pack by shutting down the ESC if the battery voltage drops too low.

here is a picture of a brushless ESC electric speed control
The red blue and black wires connect to your brushless motor, the red and black wires with the Deans connector on the tip connect to your battery, and the connector terminal wire plugs into your receiver.

  • Brushed motor
With a brushed motor, the speed is controlled simply by restricting the amount of power delivered to the motor. The easiest way for the speed controller to do this is to supply the power is short pulses, many times a second. The longer the pulses, the more power, and the faster the motor turns. Brushed motors connect to the speed controller via two wires; to reverse the direction of the motor, the wires are swapped.
  • Brushless motor
With a brushless motor, power is controlled in the same way, but the speed controller must electronically select between the multiple sets of windings in the motor to make it turn. Most modern brushless speed controllers are known as sensorless controllers and make use of the voltage generated (Back EMF) in the momentarily unpowered windings to determine the position of the motor. Virtually all brushless motors and controllers used in model helicopters have three wires; to reverse the direction of the motor, swap the connections of any two wires.
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Top rated Brushless Motors for your RC Plane, RC Heli, RC Car and RC Boat

These Brushless motors below are considered as the top end motors when it comes to the world of electric motors for your RC hobby. As with quality comes price, these motors below start from $70 and go up to hundreds of dollars. What makes these motors top quality can be from quality craftsmanship, powerful and quality magnets, quality stators, wires and such that can withstand a great amount of heat.

Axi Brushless Motors
Scorpion Brushless Motors
MEGA Brushless Motors
Himax Brushless Motors
Medusa Brushless Motors
Neu Brushless Motors
NOVAK Brushless Motors
Vector Brushless Motors
Hyperion Brushless Motor
Vortex Brushless Motors

Mid Rated and affordable Brushless Motors

These motors below are considered average and to my experience, they perform great considering a low price tag. If you are just getting into electric RC hobby, these brushless motors below are perfect to get you up and going.

Turnigy Brushless Motors
Hacker Brushless Motors
Wicked Brushless Motors
e-flite Brushless Motors
EMAX Brushless Motors
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