"Frank Grimes" (FrankGrimes)
06/15/2016 at 23:24 • Filed to: None
0
16|
"Frank Grimes" (FrankGrimes)
06/15/2016 at 23:24 • Filed to: None | 0
| 16 |
How can I lower the speed of a DC motor without dropping the torque?
Slant6
> Frank Grimes
06/15/2016 at 23:27 |
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You mean Electric Space Wizards?
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Frank Grimes
> Slant6
06/15/2016 at 23:33 |
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HAHAHA! I will take advice from any kind of electrical person whether wizard or space wizard or not.
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Slant6
> Frank Grimes
06/15/2016 at 23:36 |
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Are gears an option?
Highlander-Datsuns are Forever
> Frank Grimes
06/15/2016 at 23:36 |
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Lower the voltage? (I’m guessing, did I guess right).
Funktheduck
> Frank Grimes
06/15/2016 at 23:36 |
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Lower voltage?
Sovereign, Purveyor of Coupes
> Frank Grimes
06/15/2016 at 23:37 |
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I’m not the best with electronics, so I’ll try a mechanical solution instead.
If there’s any gears involved, modify it for a larger one with a smaller drive gear. Less speed and more torque.
Though I’m guessing you already knew this.
Daily Drives a Dragon - One Last Lap
> Slant6
06/15/2016 at 23:41 |
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All my friends gave me very strange looks when I showed them this.
interstate366, now In The Industry
> Frank Grimes
06/15/2016 at 23:42 |
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Whatever the opposite of VTEC is.
Berang
> Frank Grimes
06/15/2016 at 23:45 |
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You can put it under load?
The torque shouldn’t lower as the speed lowers, only as the current lowers.
tromoly
> Berang
06/16/2016 at 00:09 |
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That’s what I was thinking, lower the voltage so the RPM drops due to the kV of the motor, but increase the current draw so that the total wattage stays the same.
brianbrannon
> Frank Grimes
06/16/2016 at 00:30 |
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Increasing the load will drop the speed without dropping the torque
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Frank Grimes
> brianbrannon
06/16/2016 at 00:42 |
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Well i guess I should have been more clear. I have a saw that runs 3800 rpm I want to use a blade that the max speed is 1800 rpm but I don’t want to reduce the speed by reducing the input power and thus lose the torque required to cut and stall out the saw.
My original idea was a gear reduction but if it could be done through electrical means and just finding the right controller or something.
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Frank Grimes
> Slant6
06/16/2016 at 00:47 |
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This was my first idea. But its a chop saw I think the circular blade is mounted directly to the motor shaft.
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Frank Grimes
> tromoly
06/16/2016 at 00:48 |
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well i need a saw that normally runs 3800 rpm no load to run 1800 rpm no load but i still need the torque to be able to cut and not stall.
Tekamul
> Frank Grimes
06/16/2016 at 07:07 |
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I don’t believe you can do what you want to do.
There is a linear relationship between max torque at stall, and no load speed. You could do it with a fancy controller that current starves the motor at no load (higher resistance), but I doubt that’s what you’re looking for.
Same torque, lower max speed means different windings.
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Frank Grimes
> interstate366, now In The Industry
06/16/2016 at 16:24 |
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so more power got it.