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Old 11th March 2003, 10:50 AM   (permalink)
Default DC 220V Motor - speed control

Hi everyone,
for first i'm sorry for my bad english and for my low knowloedge....

I need an help, because i have to control this motor:
D.C. PERMANENT MAGNET MOTOR
CLASS F
230 V 225 W 2150 RPM

I want to control it with a SAFE elettronic circuit, someone can help me?
Where can i search in the web for a schematics?

Thank you very much.
Jumbolino is offline  
Old 11th March 2003, 06:14 PM   (permalink)
Default

Do you call 230V DC a safe thing? There are many circuits available for 12V DC and so and you can modify their power stage to suit your requirement but 230V DC is too dangerous than 230V AC. Be careful while experimenting. Try this circuit, its an open loop controller.
http://www.solorb.com/elect/solarcirc/pwm1/index.html
http://www.solorb.com/elect/solarcirc/pwm2/
You'll have to put a high voltage/current MOSFET.
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kinjalgp is offline  
Old 11th March 2003, 08:19 PM   (permalink)
Default Safe

For "SAFE" I mean to have something that works good.
I understand that 230V DC isn't safe, but i have a 220 DC motor to control....
Do you advise a SCR driver?
Jumbolino is offline  
Old 11th March 2003, 10:14 PM   (permalink)
Default

Hi Jumbolino,

Do you mean a light dimmer switch?
They are for AC, you might be able to
run one through a bridge rectifier
to the motor, assuming its run from
the AC mains.
The packaging will usually say its not
meant for inductive loads, so you may
find it wont cope.

Make sure that the unit is properly
earthed, don't rely on "double
insulation".
An AC electric shock can hurt, but a
DC electric shock can 'grab' and make
it difficult to let go, so take care.

Regards, John
john1 is offline  
Old 12th March 2003, 03:01 AM   (permalink)
Default Re: Safe

Quote:
Originally Posted by Jumbolino
For "SAFE" I mean to have something that works good.
I understand that 230V DC isn't safe, but i have a 220 DC motor to control....
Do you advise a SCR driver?
Have you looke d at the above given pages? They are MOSFET based.
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