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|26th September 2007, 11:36 AM||#1|
Join Date: Aug 2006
Digital zero-voltage SPS with PID contrlol and feed forward
I´m thinkin of building a SMPS for private needs and i want a SMPS. As I´m an automotive engineer I have a lot of interest in control systems etc so I´m thinking of a digitally controlled SMPS.
Basic design is:
230V in - rectifier - Zero-voltage half/full/quasiwave switching MOSFET/transistor -~100V DC output.
The system should be controlled via a digitally PID controlled current-mode controller. Best would be if it had instant current feed-forward control but also a voltage control that works over time.
Output voltage should be in the order of 50-120V.
as you all understand this PSU will be HOT! on-line for my private needs. But I guess there should be no difference in the design if one instead chose to use a transformer for off-line applications. It's just the wiring who will change sligthly?
Anyways, have other people though of a similar topology/design? Is there already a nice availabe microchip for this kind of operation or is it best to program my own PIC computer ? (That won't be a problem if it's the best way).
I´m fishing for tips advice and hopefully help here as I´m not an experienced electrical engineer. Please let me know what you think of the concept!!
Thanks in advance
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