Just starting off in scale crawling? Confused whether you
should choose brushed or brushless? Here's a little explanation on the pros and
cons!
So first thing we need to do is talk about the differences
between a brushed motor and a brushless motor. A brushed motor has the magnets
on the casing, and the windings on the rotor. Brushed motors are usually lower
cost, higher maintenance, and better for low speed control. They contain
"brushes", which needs to be replaced every so often to maintain the
best performance, whereas brushless doesn't require these "brushes"
to operate. Brushed motors are also fully operable underwater, and won't be
damaged.
Brushless motors are inside out, meaning that they have the
windings on the can, and the magnets on the rotor. Brushless also come as
sensored or sensorless. Sensored Motors have an additional multi-wire loom that
connects the ESC to the motor, which tells your ESC the exact position of the
rotor inside your brushless motor through three Hall Effect sensors. This gives
you better control over your throttle. Sensorless doesn't have that, so they
determine the position of the rotor using back-EMF (Electromotive Force). This
will usually lead to "cogging" at the low end of your throttle
spectrum. Brushless motors can be used underwater, but only if you do some
waterproofing first. Inside the brushless motor, there's a board that can short
if it meets water, so best to keep it dry!
So what's good for scale crawling? Brushed motors, like Snow
Panther, are usually known as the go-to type of motor for scale crawling, and
for good reason. Low throttle control is much easier to achieve with a brushed
set-up, and the cost to replace brushed motors makes it an affordable
undertaking. You don't even need to replace entire brushed motors, just replace
the brushes in it and take care of your motors and you'll be just fine.
Completely submergible in water, and usually easy to set-up, there's a reason
why brushed motors are currently king.
Brushless set-ups can work for you if you'd prefer. The good
thing about them is that they're much easier to maintain. You don't have to
replace brushes and they're much more power efficient than a brushed setup.
However, at low throttle speeds, if you're using a sensorless set-up, cogging
is much more prevalent. Sensored brushless systems can work to your advantage
though if you decide to. It's a bigger initial investment, but with proper maintenance,
care, and driving, it will last you a lot longer! Set-ups such as Hobbywing's
Brushless Systems can be both affordable and effective!
Let us know if you have any questions! If you want us to
explain anything, please email us at editorial@asiatees.com!
Author: Chris Chu
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