On Apr 16, 2:29*pm, harry wrote:
...
Power factor control is similar to the design issues of a grid-tie
inverter, with a large enough market to support custom ICs:
http://focus.ti.com/lit/an/slua144/slua144.pdf

*jsw-
An unneccessary complication. Far easier and better to mount PF
correction capacitors on individual motors.-

An incorrect assumption. Those are for more complex loads like
switching power supplies with rectifier inputs.

jsw