Recent content by IEEE

Thank you for all answers. I definitely had the wrong info on the variable speed drives. Last question on this subject if I may. What would be typical maintenance on a Variable speed drive? Can it run 365 days a year without interruptions? Do they all need to be mounted on a well vented...

As the title says, I need to raise the RPM of a 3ph 480VAC motor by approximately 20%. I looked into Variable speed drives but from what I have seen, they are used to drive the motor from 20-100% of input voltage. Any ideas on what to look for? For reference, motor power is 3HP. Thank...

Current for the spikes should be fairly low. At 600VDC, current consumption is around 10-12 Amps. Rise and fall time should be fairly quick, I would say around 10% of the spike duration. It is not the rise and fall time I am concerned about, it is really how to produce the spikes on top...

yungman, I am currently building a test setup to replicate what the rail equipment would see when powered by a sub station. I will be using an AC-DC power supply to feed the 600VDC to the test unit, not a sub-station. I also need to be able to modulate the amplitude of the...

Thank you for the quick reply berkeman. I am somewhat familiar with the fast transients tests but I doubt that the same equipment could be used in this case. For my experiment, I need to be able to generate the spikes "on top" of the 600VDC nominal voltage. The fast transients created...

Hi, I have an issue I hope you guys will help me solve. I need to re-create a problem seen on Rail equipment where high voltage spikes are affecting equipment (resistive load) normally running on 600VDC. I thought about using a simple RC circuit to produce the spikes over the 600VDC...