Brushless RC Motors
Levelling the Playing Field for Electric Cars
Brushless rc motors have abridged the age old gap in playing field of nitro and electric cars.
Not too far in the past when it came to power electric radio controlled cars were a distant second to nitro and gas rc cars. But things are changing with advances in technology. Introduction of brushless motors is one such welcome change that is all set to get in the power status to electric racing.
Brushless motors have been well accepted by racers world wide. Many manufacturers have come up with motors that suit the tough racing environment of the present day. With every passing day they are trying to push in new up gradations at reduced prices which seems lucrative to the rc enthusiast in me. Having said that I would like to make it clear that brushless motors are expensive than their brushed counter parts.
Working of Brushless RC Motors
The way these motors work is very similar to the working of brushed motors. Like the brushed ones there is interaction between two sets of magnets, one being electro magnets and the other being permanent magnets.
One prominent difference of brushless motors is that here the electromagnets are static in their position while the permanent magnets rotate. This is just the opposite of what happened in brushed motors.
Brushes were essential in motors because of the rotating electro magnets. However in brushless motors the electro magnets are stationary. Thus there is no need of having brushes in such motors. There are Electronic Speed Controllers that take care of flipping the voltage of the electromagnets.
Types of Brushless Motors
Brushless motors could divided into two categories viz inrunner and outrunner. This categorization is based on the position of the rotating permanent magnets.
In inrunner motors the rotating permanent motor is set inside the electromagnets. In outrunner motors the permanent magnet is set outside the stationary electro magnetic coils.
Inrunner brushless motors turn faster and thus have a greater RPM. This means a more efficient motor. However this comes at a price. These motors deliver less torque and are noisy.
Outrunner motors on the other hand have lesser revolutions per minute but deliver more torque. These motors operate quietly.
Where to Buy Brushless Motors
Brushless rc motors though expensive as compared to brushed motors, I believe is worthwhile.
You can find cheap brushless motors on eBay. EBay is a place to find great bargains on hobby products related to RC. You will need to have a free account with them to bid on any items on eBay.
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