We have someone asking us about rotor testing for broken/cracked bars and joints. We use the growler test on all the rotors. They brought up an induced current loop test in the spec they sent us. I can find information on testing the stator, but the test on a rotor is slim information. About...
I am working with electric submersible motors filled with a mineral oil. The oil acts as both a cooling fluid and lubricant for the motor. The motors operate in sea water with a normal ambient rating of 30°C. The motor shell material thickness depends on the material being used, but is no...
I have a question on bolt preload and have been getting confused. I am trying to calculate the bolt preload for an end plate so we are able to pressure test the motor. Do I set the bolt pre-load to what will hold the end plate in place without fluid leaking so the bolt does not pass its yield...
One of our customers has asked us at what angle of misalignment will problems start to occur. I am at a loss as to how to solve this, as all specs I have show no space. The customer is the one who has chosen the spline and coupling, and they are making the coupling themselves. I do know the...
Is there a standard (IEEE, UL, CE, etc.) that covers water detectors in an oil filled motor, oil bath, or even just genericaly?
We have been using the stripped ends of two wires as our detection probes for the few motors we make that are not filled with water on purpose.
We are building an 80V 3 phase squirrel cage motor to operate at 79 Hz. Our problem comes when testing the motor, we have no power source to test it at the rated speed. If I keep a constant V/Hz ratio and run it at 60 Hz, do I use the torque at the test points and convert the recorded Hp to...
