Hi all,
I'm designing a motor controller board for consumer and industrial usage and have some doubts about the power supply aspect. I'm trying to see if I can integrate the power supply into the board's design to simplify assembly and stock-keeping. The problem is, the product will be running off common household mains (110-240VAC) as well as industrial voltages up to 600VAC. Handling household mains is not a problem as I can use off the shelf components or modules, but once I include industrial voltage ranges in my search, nothing suitable comes up.
My board (sans motor) will consume less than 10W of power at 12V. Is there a sensible way to include a cheap on-board switching supply that accepts 110-600VAC? Industrial voltages are three phase, but I figured I can run off two out of the three delta lines since an unbalance of 10W shouldn't have much effect on the system. Is this a good idea?
One idea I came across is to use a multi-tap transformer at the rectification stage of the switching supply to step the voltage down to something the switcher can handle. Is this idea feasible?