This is something I touched on in another post , Id like to seek out more opinions on it .
I want to try a single phase VFD to to provide a variable voltage and frequency input to a mains transformer , that way I could tune both voltage and frequency , reduce core loss in the transformer,reduce magnetic radiation from it ,and make PSU filtering much more effective at say 400hzx2 . Comercial motor drives are coming in cheap from China ,typically .5kw is the smallest . Extra filtering between VFD and transformer might be a good plan , would a standard mains filter like used in modern switchers be appropriate here?
I might try the idea out at work next week , I could have the VFD and logging multimeter attached to the transformer then sweep the frequency under load and measure the resulting ripple after a bridge and cap . Would a current clamp meter in close proximity to the transformer give an indication of how much magnetic leakage was being radiated ?
I want to try a single phase VFD to to provide a variable voltage and frequency input to a mains transformer , that way I could tune both voltage and frequency , reduce core loss in the transformer,reduce magnetic radiation from it ,and make PSU filtering much more effective at say 400hzx2 . Comercial motor drives are coming in cheap from China ,typically .5kw is the smallest . Extra filtering between VFD and transformer might be a good plan , would a standard mains filter like used in modern switchers be appropriate here?
I might try the idea out at work next week , I could have the VFD and logging multimeter attached to the transformer then sweep the frequency under load and measure the resulting ripple after a bridge and cap . Would a current clamp meter in close proximity to the transformer give an indication of how much magnetic leakage was being radiated ?