how much difference will it make if I replace the squirrel cage in an AHU where all dimensions are identical except for the number of blades.
original has 16, and my new blade will only have 10.
will there be a need to speed the fan up to move the same amount of air?
I'm having a problem with a 75kw doubleshaft electric motor, it drives two hydraulic pumps and when these pumps reach their high pressure the motor is drawing 200+ amps (it is rated at 118A @460vac) this situation only lasts for a second or two at a time, but it happens 10-12 times a minute and...
Rewinding single phase motors are few and far between these days. When they they do come in they are special or obsolete, my question about the rewinding o them is this: WHY do the main windings seem to be installed in layers? It used to be a four pole winding with six leads would have two...
I have a VFD, when we hook a motor to it the shaft just rocks back and forth; when the same motor is hooked up to the drive next to it it works fine... Why are the motor shafts just rocking back and forth on this drive and not running? I have tested the the diodes and transistors as well as the...
