Well, I don't know of any freebies like that myself, but Google could be your friend.
220 to 110AC would give you with a full rectified wave 110*1.4142~=156 volts.
You still haven't told us your current requirement...
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Well, I don't know of any freebies like that myself, but Google could be your friend.
220 to 110AC would give you with a full rectified wave 110*1.4142~=156 volts.
You still haven't told us your current requirement...
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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oky I have A dc motor work at 110VDC , so I build driver circuits to give us variable voltage to motor , using PWM and PIC
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Again, how much current do you need (ma, A)
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
|
I need 3A of current
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3A for your DC motor or the rest of the circuit?
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
|
3A for a motor, thanks mister for your patient
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I'm not a motor professional and I feel It may depend of the motor type you're going to use, but this is what I would try.
The Driver motor will be PWM, so just choose Mosfet/IGBT one who can handle your current and voltage range + certain amount of safety.
Your software will handle the voltage range by reducing the PWM duty cycle. You should monitor the voltage across your motor using a PIC adc pin like regular voltage regulator do. This way you ensure to have smooth and constant voltage, and why not monitor the current as well to add some safety to it?
Maybe the following links would help.
http://f-cpu.seul.org/~nico/astromec...rick_motor.pdf
http://ww1.microchip.com/downloads/e...tes/00894a.pdf
http://ww1.microchip.com/downloads/e...tes/00898a.pdf
http://www.microchip.com/stellent/id...param=en026178
How much current you need for your 12V line?
Last edited by mister_e; - 1st February 2009 at 19:11.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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