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Discussion Groups | BasicX | Controlling an electro magnet
Discussion forum for the BasicX family of microcontroller chips.
Controlling an electro magnet - i_cohen - Aug 2 6:58:47 2007
Hello all,
Does anyone know what is the best way to variably control a 12v
electro magnet through a bx24? I need to be able to smoothly change
its power and this is a ~20W thing.
Thanks,
Idan
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Does anyone know what is the best way to variably control a 12v
electro magnet through a bx24? I need to be able to smoothly change
its power and this is a ~20W thing.
Thanks,
Idan
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Re: Controlling an electro magnet - Scott Carlson - Aug 2 7:30:16 2007
PWM out to an amplifier.
On 8/2/07, i_cohen wrote:
>
> Hello all,
>
> Does anyone know what is the best way to variably control a 12v
> electro magnet through a bx24? I need to be able to smoothly change
> its power and this is a ~20W thing.
>
> Thanks,
> Idan
>
>
>
--
Scott R Carlson
Mechanical Engineering, Rochester Institute of Technology
[Non-text portions of this message have been removed]
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
On 8/2/07, i_cohen
>
> Hello all,
>
> Does anyone know what is the best way to variably control a 12v
> electro magnet through a bx24? I need to be able to smoothly change
> its power and this is a ~20W thing.
>
> Thanks,
> Idan
>
>
>
--
Scott R Carlson
Mechanical Engineering, Rochester Institute of Technology
[Non-text portions of this message have been removed]
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Re: Controlling an electro magnet - Tom Becker - Aug 2 12:11:26 2007
> ... variably control a 12v electro magnet through a bx24...
This sounds little different from PWM of a small motor. I'm sure you
can use any brushed-DC-motor control solution like a 2-Amp H-Bridge
http://www.st.com/stonline/products/literature/ds/1773.pdf , which
will allow you to vary the magnet from full-attraction to
full-repulsion, in 256 levels (8-bit PWM) to 1024 levels (10-bit).
Many small motor driver boards like this
http://www.lynxmotion.com/Product.aspx?productID=92&CategoryID=10 will
do, too, I'm sure.
You can also use a discrete power transistor as a high-speed switch to
achieve the same end.
Tom
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
This sounds little different from PWM of a small motor. I'm sure you
can use any brushed-DC-motor control solution like a 2-Amp H-Bridge
http://www.st.com/stonline/products/literature/ds/1773.pdf , which
will allow you to vary the magnet from full-attraction to
full-repulsion, in 256 levels (8-bit PWM) to 1024 levels (10-bit).
Many small motor driver boards like this
http://www.lynxmotion.com/Product.aspx?productID=92&CategoryID=10 will
do, too, I'm sure.
You can also use a discrete power transistor as a high-speed switch to
achieve the same end.
Tom
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )