I'm using Allen Bradley 42MRU-5000 photocells that intermittently fail to operate reliably in a cold, high-humidity environment. The photocells detect pallets of cold vegetables on a conveyor coming out of a hydro-cooler tunnel. They stop the conveyor to await forklifts used to haul pallets...
I'd like to use batteries to power the DC bus, and modify a small VFD to control a larger HP AC induction motor.
Is there any DIY info available about how to "marry" a small VFD to larger capacity output devices? (ie: IGBTs rated for higher voltage/amperage.)
Any help appreciated.
Regards,
rmarotta
Gentlemen,
I have a vfd that I'd like to use on a machine that requires a certain range of power to move material.
Hopefully, this vfd will replace several components. (A reversing contactor, soft starter, and a non-functioning load detector.)
Variable speed is not a primary requirement, but can...
Can the efficiency of a 3 phase air conditioner be increased by controlling it's compressor speed at times of reduced load? If so, would the addition of a VFD on the compressor, (suitably controlled) accomplish this?
Could there be enough savings to justify it?
Regards,
rmarotta
