batteries, motors, and esc?
09-04-2008, 10:38 PM
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batteries, motors, and esc?
hi, i am new to the hobby and have been bombarded with all the little accessories and parts on all the websites. For example, what exactly is exactly is a speed controller, and what do its amp rating have to do with. How do you know what batteries go with witch engines and speed controllers?? And what is the difference between all of these different brushless and brushed engines?I know i have a lot of questions, but i hope someone will have the time to answer them. Thanks a bunch in advance
09-04-2008, 11:01 PM
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RE: batteries, motors, and esc?
Good question. I've often wondered about these same things, but I haven't gotten around to asking yet!
What I'd like to know, in the same line of questions, is "Can I use my 72Mhz 7 channel Futaba Tx + Rx to fly an electric? Does the ESC hook up to the Rx?"
(btw, ESC = Electronic Speed Control; ie: a throttle for electric motors to tell it how fast to spin by letting "X" amount of power flow through when the throttle stick is at position "X")
Brushed vs Brushless motors are different types of electric motors. Brushed motors have wire "brushes" (like on a pot scrubber) on the core of the motor (or the "walls" of the core; either way...) that made physical contact with the sides of the motor's core to make an electric connection and thus "make it spin" (without going into what I remember from "Power Transformation and Distribution" class @ GaTech). Brushless motors use an electromagnetic force to generate a field that makes the core of the motor spin (yeah, it's a "cliff note" explanation...) - there is no "physical" contact between the spinning core and the housing. Brushed motors will wear out over time (sometimes a LONG time!) due to friction, wear/tear, etc... from the physical contact whereas Brushless motors don't have that problem and have a longer lifespan (and I believe they spin faster and tend to be more energy efficient b/c they don't have to contend with friction)
What I'd like to know, in the same line of questions, is "Can I use my 72Mhz 7 channel Futaba Tx + Rx to fly an electric? Does the ESC hook up to the Rx?"
(btw, ESC = Electronic Speed Control; ie: a throttle for electric motors to tell it how fast to spin by letting "X" amount of power flow through when the throttle stick is at position "X")
Brushed vs Brushless motors are different types of electric motors. Brushed motors have wire "brushes" (like on a pot scrubber) on the core of the motor (or the "walls" of the core; either way...) that made physical contact with the sides of the motor's core to make an electric connection and thus "make it spin" (without going into what I remember from "Power Transformation and Distribution" class @ GaTech). Brushless motors use an electromagnetic force to generate a field that makes the core of the motor spin (yeah, it's a "cliff note" explanation...) - there is no "physical" contact between the spinning core and the housing. Brushed motors will wear out over time (sometimes a LONG time!) due to friction, wear/tear, etc... from the physical contact whereas Brushless motors don't have that problem and have a longer lifespan (and I believe they spin faster and tend to be more energy efficient b/c they don't have to contend with friction)
09-05-2008, 12:30 AM
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RE: batteries, motors, and esc?
Head over to the electric forums there is a specific forum for just these questions,,,yes the esc plugs into your rx in the throttle channel your 7c rx may be a bit big for a foamie plane, go with a Berg rx if your not using 2.4 stuff ,,you dont want to jam the throttle full on or you risk frying the esc or bec battery eliminator circuit thats why there are normal and "burst" rates....Rog
09-05-2008, 03:04 PM
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RE: batteries, motors, and esc?
ORIGINAL: loveflying!!
hi, i am new to the hobby and have been bombarded with all the little accessories and parts on all the websites. For example, what exactly is exactly is a speed controller, and what do its amp rating have to do with. How do you know what batteries go with witch engines and speed controllers?? And what is the difference between all of these different brushless and brushed engines?I know i have a lot of questions, but i hope someone will have the time to answer them. Thanks a bunch in advance
hi, i am new to the hobby and have been bombarded with all the little accessories and parts on all the websites. For example, what exactly is exactly is a speed controller, and what do its amp rating have to do with. How do you know what batteries go with witch engines and speed controllers?? And what is the difference between all of these different brushless and brushed engines?I know i have a lot of questions, but i hope someone will have the time to answer them. Thanks a bunch in advance
With BRUSHLESS motors, the windings have to be energized at specific times to get the motor to turn. The ESC handles this.
The Rating shows you how much power the ESC is capable of handling.
In turn the power consumed by the motor is DIRECTLY related to the size of the prop used.
If you put a prop on an electric plane, that is too large for the motor, the motor will still attempt to draw the electricity from the ESC, but the motor will heat up and melt...
So you have to match the ESC and motor to what prop you are going to use.... and the latter is determined by the plane size and expected performance.
Re: Brushless Brushed
Brushless motors are more efficient and powerful for a lighter weight than their brushed equivalents. Also brushed motors last a long time, while brushless motors can be used up in a season or two.
