Just looking for a sanity check here. I'm evaluating the feasibility of picking up a nice 10 horse air compressor for my home shop and would like the ability to vary it's operating speed (within published design specs). It's already got a three phase motor, so I need only furnish a VFD.
In order to run a 10 horsepower VFD off of single phase, I'll either have to de-rate the whole installation or see about installing an external single-phase rectifier to feed the DC bus terminals. That's why I'm slowing down and asking a question here.
Are the DC bus terminals on drives generally intended for external rectification? Or are they there for e.g. external filter caps, etc? They are usually sized for 100% of the input and output terminals' wire size, which leads me to believe they are there for a power application of some sort. I know some drives utilize features like active rectification and single-phase lockout which might not play nice if there is no voltage on the AC line terminals.
Any thoughts?
In order to run a 10 horsepower VFD off of single phase, I'll either have to de-rate the whole installation or see about installing an external single-phase rectifier to feed the DC bus terminals. That's why I'm slowing down and asking a question here.
Are the DC bus terminals on drives generally intended for external rectification? Or are they there for e.g. external filter caps, etc? They are usually sized for 100% of the input and output terminals' wire size, which leads me to believe they are there for a power application of some sort. I know some drives utilize features like active rectification and single-phase lockout which might not play nice if there is no voltage on the AC line terminals.
Any thoughts?