RE: How does a brushless motor work?

RE: How does a brushless motor work?
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RE: How does a brushless motor work? - 1/18/2008 8:56:11 PM

Posts: 1521
Joined: 10/31/2002
From: Lyndonville, VT, USA
Status: offline

Greetings Ron,
Good stuff in that link.
I was recently looking at some information regarding the GM/Chevrolet Volt concept car. The idea of a plug in hybrid with a purely electrical drive (gas engine/generator for maintaining charge on cross country trips) looks very promising, with a range of around 65Km without running gas, I could make 3 to 4 trips to town per day on an overnite charge, that would save a lot of gas and since most of the electricity in my area is Hydro and Nuke, a lot less carbon emissions.
Best Regards,
Pete

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RE: How does a brushless motor work? - 1/21/2008 7:39:12 PM

bil2

Posts: 108
Joined: 9/10/2005
From: Dade City, FL, USA
Status: offline

When GM was doing battery research in the 1980's they had a sign hanging on the lab's wall:
Far.
Fast.
Cheap.

Pick any two.....

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RE: How does a brushless motor work? - 1/21/2008 7:52:35 PM

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From: Lyndonville, VT, USA
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Yeah, but we want it all

Dare to dream

Pete

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RE: How does a brushless motor work? - 1/21/2008 8:13:19 PM

bil2

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From: Dade City, FL, USA
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As I've told my children (until they moved out) - Everything/all things is not an option....

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RE: How does a brushless motor work? - 2/9/2008 7:56:29 PM

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Joined: 11/6/2007
From: , UT, USA
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How about the Tesla car. Any of you ever heard about that? I am thinking about going to the Junkyard and finding a nice old car (geo metro for the win), and converting it much like the tesla is.

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RE: How does a brushless motor work? - 3/24/2008 9:51:12 AM

Stokes

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Joined: 5/12/2006
From: Wellen, GERMANY
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hiya all. I've been building RC boats and working with BL motors for a while now. I bought a catamaran a couple of days ago, intended to be run on twin brushless outrunners. Now as far as i knew all i needed was two outrunners, two BESCs, two drive shafts and counter-rotating props, a y-cable to connect the two BESCS in parallel and feed into 1 receiver channel. Problem is i bought the boat from ebay, as an unfinished build, and amongst the bits and bobs (all new), the guy i bought it from supplied a v-tail servo mixer. Why? have no idea what this does (although i'm guessing its used mostly for aircraft applications), and since i'm only running 1 servo for steering, the only remaining possibility is to hook up the two bescs to it....any reason for doing this?

thanks in advance.....

(in reply to shinob1)

RE: How does a brushless motor work? - 3/24/2008 3:59:35 PM

bil2

Posts: 108
Joined: 9/10/2005
From: Dade City, FL, USA
Status: offline

My guess is, the guy's wondering, "Where did I put that v-tail mixer, hmmmm?"

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RE: How does a brushless motor work? - 3/24/2008 6:43:56 PM

ron_van_sommeren

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From: Nijmegen/the NetherlandsNetherlands, NETHERLANDS
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Better start a new thread Stokes, this is a FAQ.

< Message edited by ron_van_sommeren -- 3/24/2008 6:44:16 PM >

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RE: How does a brushless motor work? - 3/24/2008 9:47:01 PM

Stokes

Posts: 186
Joined: 5/12/2006
From: Wellen, GERMANY
Status: offline

yes that was my question, and i'm sorry i presented you guys with an ooq (one off question) rather than a faq...will start my thread when i get the motors and bescs - thanks anyway

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RE: How does a brushless motor work? - 5/13/2008 8:08:51 PM

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Joined: 2/28/2008
From: Harvard, IL, USA
Status: offline

quote:

ORIGINAL: Matt Kirsch

A popular myth that I fell victim to myself. Turns out that even though the ESC does switch the polarity back and forth on the various phases of the motor to make it turn, it's still putting out DC voltage. It's similar to AC, but the wave is a "square" type. Unlike AC, where the voltage gradually changes from maximum + to minimum -, producing a "sine" wave, this switched DC changes from full + to full - instantly.

The picture below kind of shows what I mean. This is what you'd see on the screen of an oscilliscope if you compared true AC to what the brushless ESC is doing, sort of, kinda, maybe

ac current runs above and below 0v (thats why we call it alternating current). dc current runs 0v or higher. sorry if i'm wrong all my text books show a very different graph

(in reply to Matt Kirsch)

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All Forums >> Electric Aircraft Universe >> Brushed/Brushless motors, speed controls, gear drives >> RE: How does a brushless motor work?
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