Hello All,
An interesting idea was raised today by my colleague. Let's say you have 3 phase, 2 speed (3600/1800 RPM) consequent winding motor and you're running it at no load at 3600 RPM. Shut the power off, reconnect for the lower speed and energize. At point of energizing the low speed...
Hello all,
I've been doing a bit of a search online for companies that deal with testing motors in north east US. In particular, I'm looking for a place that can test (heat run) 1000+ HP @ 3600 RPM continuous. So far, several places that I found have the power required but can't sustain...
Hello All,
I have an aluminum (6061) disk with slots cut into it. Aluminum fins (also 6061) will be inserted into the slots and joined using dip brazing. As far as I know, dip brazing process involves a bath of sodium, potassium, lithium and aluminum. Has anyone ever heard of using...
I recently ran into an issue of how does the air gap of a 3 phase induction motor relate to the motor's starting current. Even though many other performance characteristics of the motor change as well, the starting/locked rotor current was my focus. It appears that with a larger air gap the...
Our Wheatstone Bridge that has been in use for a good 40 - 50 years has finally come to a point where it needs to be replaced by a new unit. I searched several places that might possibly sell one but they didn't have any. Can anyone please recommend a place that sells them.
eemotor
Hello to all,
I've been going through NEMA and IEEE standards trying to conclude the generally accepted minimum stall time for a 4000V, 3ph., 60HZ, 1250HP induction motor. NEMA specifies that that motors should be able to withstand locked rotor currents for at least 12 seconds. However, this...
