Re: Increased power to Gecko 201's

> >
> Torque at rest will not change at all. The high speed torque will

improve

> about twice at any speed above a crawl. And, so, whatever your top

speed

> is now (I'm assuming you are limited by the motors losing steps)

should

> roughly double. Also, your motors will run quite a bit hotter. I'm
> guessing those big motors run pretty cool now, so that may not be a

problem.

> This is a 50 VAC transformer (or 100 VCT with a 2-diode rectifier)?
>
> (If your speed limit is due to the computer's speed at producing

step

> pulses,
> then you'll get no benefit, of course.)
>
> Jon

Jon, I am not disputing what you say but I don't understand the
physics here. If you limit the current to 6A by controlling the
pulse width how can you get more power out (torque) when the input
power remains the same? Does charging and discharging the inductance
faster show up in efficency gains? I can see how the stepper would
move postion faster but is it a 1:1 ratio gain? I assumed the larger
heat rise is due to IR losses to an extent. Am I making false
assumptions that the pulse width per pulse is not limited to whatever
products the current? Help me out on the concept and where the power
gain comes from.

TC