Dynamometers

830 watts would need a reasonable sized Prony brake, but perhaps you only need to run it for 30 seconds at a time. The nice thing about them is how easy they are to calibrate; just use a spring gauge to measure the tension in the belt, and multiply that force by the brake diameter and the rotational speed (all of which are easily measured) and you're done. The heavy metal wheel from a spin bike (to absorb most of the heat) wrapped half-way with a leather belt would do the job nicely.

Clifford Heath.

Which does NOT put power back to the grid

What a putz... If you only knew how much..

Jamie

Thank you. :)

Jamie

No comment.

Jamie

I'm well aware of lot of what Jamie knows that isn't so - he does advertise.

Jamie's unfortunate condition does blind him to the way he looks to the less ill-informed.

--
Bill Sloman, Sydney

0-80rpm and ~800W, would probably fit a stationary bike quite well, it is about the speed and power a very fit a human can do on a bike

-Lasse

You are one hard-headed PITA. Get some balls and call the manufacturer of the controls to which I provided a link in this thread. Ask them. If you do not want to educate yourself, then you are a waste of air.

Chew on this, hard-head...

"Braking

Does the application require the drive to provide braking torque? If so, how much and how often? Even a little braking torque can be an issue if it is continuous. It adds up.

DC drives can easily pump braking energy back to the AC mains. In fact the cost for full regeneration is so reasonable that Nidec-Avtron offers regenerative braking bridges for free up to about 300HP. Above that, non-regenerative DC bridges are available and cost less than their AC drive counterparts. Alternatively, dynamic braking can be provided by adding an external DB contactor and DB resistors. The advantage goes to DC. "

If you think this is helping your case, you are dumber than a fence post. Call the manufacturer to which I referred in my earlier post. Unless you don't want to know that you are wrong.

Oh. Got egg on your face now, eh?

Contacting the manufacturer would be an embarrassment on said subject.

That drive you pointed to is junk to start with, low end, drop it in the basket when it hiccups.

You don't get it. You are the one being thick headed.

Jamie

How bout you calling them, I could go for a laugh!

Jamie

Not only that, you can't interpret the meanings of half the shit said here, no wonder you are confused

Jamie

I did. They confirmed exactly what I said. The drive returns energy to the AC line.

Yes, you would be embarrassed by their reply.

Like you would know? I will be sure to forward this to them to see what they think of you impugning their product in public.

The phrase "Being ignorant is not so bad as being unwilling to learn" fits you to a tee.

I don't think that John S is confused, and since you can't interpret the meanings of half the stuff posted

- inadequate sentence comprehension - you really are confused.

The underlying problem is that when you are confused, you think that the defect is in the stuff that has been posted.

Pity about that.

--
Bill Sloman, Sydney

Please give me the manufacturer's name and the part number again so I can contact them and find out how it works.

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