Electronic speed controller is also called ESC; it is a necessary upgrade part for your RC model. High power systems for RC model can be very dangerous, ECS allows for easy speed control adjustment, essentially providing an electronically-generated three phase electric power low voltage source of energy for the motor.

Nowadays, brushless motors have become very popular with radio controlled hobbyists because of their efficiency, power, longevity and light weight in comparison to traditional brushed motors. In additional, speed controls determine whether your vehicle can go in reverse. If you are not racing on a track, you’ll probably want to get a reverse speed control.

Here is a quick guide on how to choose your motor electronic speed controller for your brushless motor.

Brushless motor types and ESC
There are two types of brushless motor. The sensored motor includes sensors to transfer exact information to the speed control, making the sensor speed control more precise. These motors are highly prized by experienced racers who are always looking for an edge in the competition.

On the contrary, sensorless speed controls and motors can only estimate the position of the rotor. And speed control has to make its best guess to what is the correct pulse to send to make the motor go forward or reverse when the transmitter trigger is pulled or pushed. However, by coming to a complete stop, letting off the trigger, and then applying forward throttle again you will generally then go forward.

Limits and price
ESCs are available with many different features, limits, and price ranges. An ESC will have a power limit. To handle more power, the ESC needs to be larger, heavier, and is more expensive. It’s important to know the peak current your motor is going to pull at full throttle. An ESC’s limit is the lowest number of turns that it can handle. The lower turn motors it can handle, the more expensive.

This determines the current rating you should look for in an ESC. Always choose an ESC with a current rating that is higher than what you need. If the motor is going to pull 12A, a 25A-rated ESC is a much better choice than a 10A-rated one. The 10A ESC will probably overheat and cook, even if you only fly at half throttle.

All ESCs have voltage limits. Some even have more than one! Choose an ESC that is designed to work with an equal or higher voltage.