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RC Glossary


New to the RC Hobbies? What does buggy, bulkhead, nitro mean in radio control car hobbies? Check out the glossary for remote control cars below.

Brushless Motor --

First introduced in 1962, it took brushless technology a long time to reach the RC car market. These electric motors have stationary wire coils mounted on the inside of the motor can. A rotor (i.e. magnet) spins in the center of these coils. The coils are energized in sequence by the ESC, creating a magnetic field that 'pushes' the rotor, causing it to rotate as needed. Since the coils are stationary, this eliminates the need for brushes to transfer power to a rotating part (as the brushes transfer power to the comm in a brushed motor), hence the name 'brushless'. Brushless motors tend to be more efficient, quieter, smoother, and more powerful than brushed motors, as well as requiring virtually no maintenance. Compared to brushed motors, brushless motors excell at low to medium load applications, but are comparable at high load applications (such as crawling or pulling). However, cogging may be more evident with brushless motors at low speeds. They have a higher power band than brushed motors, so try gearing down a few teeth on the pinion (i.e. go from a 16T pinion to a 14T pinion) than you would with an equivelent brushed motor. A brushless motor reduces EMI (ElectroMagnetic Interference) compared to brushed motors, wich helps reduce glitching. Brushless motors are available in a variety of sizes, and are rated in 1/2 turns (6.5, 7.5, 8.5, ect) or kv (kilovolt), such as 2200 kv or 4200 kv. They come in 2 basic flavors - sensored or sensorless. Brushless motors are 3 phase motors (the A, B, and C wires are each connected to one of the 3 coils (phases) inside the can). Each phase makes up 120* of the 360* of rotation. Most brushless motors run happily at a temperature around 150* to 170*. Never run a schottky diode with a brushless motor (just in case you're wondering). Also See - MOTOR CONVERSION
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