Recent content by Eclectic

Yes, at this point, though, I'm just wanting to use the motor windings as a transformer, or with caps as a filter. I don't care about pulling or pushing mechanical power from the thing... If someone could point me to a source of cheap, available 5-10 kva 3 phase transformers, I could care less...

Ok, forget the motor/generator/rotating core/squirrel cage/rotor slip/flywheel thing entirely for a moment. If I was to cut off the conductive shunts on the ends of the rotor, I would for all intents have turned the motor into a transformer, right? There would be a closed flux path through...

Dave, yes, that's more of the kind of answer I was looking for, in fact, the small amount of slip that does exist may actually be blocking the magnetic flux path through the rotor, impeding transformer action. The links I came up with on the google search are actually very educational and...

PeterH: I don't think your posts are a waste either: just the "It can't be done" attitude. You would seem to be saying a rotary phase converter can not possibly work because it is an induction machine. A google search on "induction generator" has been very helpful...

Peterh: You are throwing terms around as if they were pronouncements from GOD. You are not giving any REASON why the arrangement is not working as a transformer with a rotating core element providing some resonant filtering action at the operating frequency. The goal here is to come up with an...

You may rest assured. I would prefer experimental evidence. I haven't heard anything yet that would convince me that an experiment is not worthwhile. (Aren't you glad we don't live in Deadwood?)

Yes. But. I'm not talking about one motor driving another as a generator. I'm talking about a single motor with two sets of windings cowound around the same stator poles. The VFD is driving one set of windings 3 phase, the other set of windings is the output, so as to isolate the VFD from...

Do you have any references? I'd think the rotor would be excited by the driving coils, and at a minimum, there should be a transformer action from two sets of coils cowound into the same stator poles. I'm planning on testing the idea, but wondered who else might have actually tried it and...

A lot of high horsepower 3 phase dual voltage motors have two sets of windings, parallel for 240V, series for 480V. Has anyone tried driving one set of windings with a VFD and powering a 3 phase bus with the other set of windings? Essentially you would be using the motor as a rotary...

I recently bought a used WWII era surface grinder off Ebay that has automatic electric feed. The Y crossfeed mechanism is missing, however. It looks like someone started to repair it and gave up. Does anyone have manuals or repair documentation for Reid Grinders? Anyone with a 2B they could take...

I recently bought a used WWII era surface grinder off Ebay that has automatic electric feed. The Y crossfeed mechanism is missing, however. It looks like someone started to repair it and gave up. Does anyone have manuals or repair documentation for Reid Grinders? Anyone with a 2B they could...

I'd think a small 1-2HP idler motor with small run caps between each leg to make it look like a purely resistive load at 60 hz would effectively act like an LC filter/snubber. The caps should take out any high frequency voltage spikes that could damage the VFD's outputs