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Electronics => Electronics => Topic started by: Steve Joblin on July 01, 2008, 10:56:23 AM

Title: Inexpensive brushless DC motor controller
Post by: Steve Joblin on July 01, 2008, 10:56:23 AM
I've been searching for a cost effective brushless DC motor controller that can control a 24V 250W motor via PWM... The only ones I have found seem to be hundreds of dollars... does anyone know where I can find an inexpensive one, or does it make more sense to make it myself?
Title: Re: Inexpensive brushless DC motor controller
Post by: izua on July 01, 2008, 12:02:32 PM
At that power you shouldn't expect something cheap, you know.
Title: Re: Inexpensive brushless DC motor controller
Post by: BANE on July 01, 2008, 06:50:53 PM
I just purchused this one yesterday, I'll tell you how it works then it comes in.
http://www.robotshop.ca/home/products/robot-parts/motor-controllers/brushed-motor-controllers/all-brushed-motor-controllers/solarbotics-l298-motor-driver-kit.html (http://www.robotshop.ca/home/products/robot-parts/motor-controllers/brushed-motor-controllers/all-brushed-motor-controllers/solarbotics-l298-motor-driver-kit.html)
Bane
Title: Re: Inexpensive brushless DC motor controller
Post by: airman00 on July 01, 2008, 07:27:53 PM
Quote from: BANE on July 01, 2008, 06:50:53 PM
I just purchused this one yesterday, I'll tell you how it works then it comes in.
http://www.robotshop.ca/home/products/robot-parts/motor-controllers/brushed-motor-controllers/all-brushed-motor-controllers/solarbotics-l298-motor-driver-kit.html (http://www.robotshop.ca/home/products/robot-parts/motor-controllers/brushed-motor-controllers/all-brushed-motor-controllers/solarbotics-l298-motor-driver-kit.html)
Bane

I never knew they made a board for the L298 , i've always used the chip by itself
Title: Re: Inexpensive brushless DC motor controller
Post by: BANE on July 01, 2008, 07:45:51 PM
Quote
I just purchused this one yesterday, I'll tell you how it works then it comes in.
http://www.robotshop.ca/home/products/robot-parts/motor-controllers/brushed-motor-controllers/all-brushed-motor-controllers/solarbotics-l298-motor-driver-kit.html
Bane
I never knew they made a board for the L298 , i've always used the chip by itself
I was about to have one custom made for like $50 before i found this one
Bane
Title: Re: Inexpensive brushless DC motor controller
Post by: bens on July 01, 2008, 07:52:58 PM
The L298 is not a brushless motor driver.
Title: Re: Inexpensive brushless DC motor controller
Post by: BANE on July 01, 2008, 08:04:27 PM
Whoops, should have read the post :D.  Your right, does he want a Stepping motor driver or something?  If not, i'm of no help :P

Bane
Title: Re: Inexpensive brushless DC motor controller
Post by: hgordon on July 01, 2008, 09:27:55 PM
Do you need forward & reverse, or just a single direction ?  A 10A controller shouldn't cost too much, though I'm not 100% certain about the voltage - the brushless controllers with which I'm familiar generally aren't used above 15V, e.g.
   http://hobby-lobby.com/speed-control.htm
Title: Re: Inexpensive brushless DC motor controller
Post by: TrickyNekro on July 02, 2008, 02:35:51 AM
Quote from: BANE on July 01, 2008, 08:04:27 PM
Whoops, should have read the post :D.  Your right, does he want a Stepping motor driver or something?  If not, i'm of no help :P

Bane

L298 is not a stepper motor driver either.... It's a dual H-bridge... if you want to connect a stepper interface it with L297 to have stepper control...

But L298 can be used for brushless motors... as far as you have some other goodies on board....
To make a brushless motor controller you need both extended programming and electronics knowledge...

Lefteris