If you were to draw out a fan curve comparing VFD to a VSD( I am using specs from the payback drive) with Kilowatts vs load. You can see at 50% the VFD is under 5% more efficient. That’s pretty close.
Having the motor energized and spinning full speed is not as wasteful as you think...
scottyuk
Yes eddie current drives are for variable torque applications(and in my opinion the only way to do it), and are not used on all constant torque applications because of slip losses. So there are lots of places I would install a VFD and a heavy duty inverter rated motor.But only where a...
V.F.D's just aren't reliable in any working conditions. They are very complicated electronic devices, and unless you are an electronic wiz they are not servicable. I would suggest switching to a V.S.D. I did. You should check out payback.com. I must sound a little one sided, but this mystery...
