CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] Re: ...power...

Posted by NCS
on 2002-02-14 14:17:05 UTC
>The voltage rating on a step motor simply means if you apply 3VDC
>across that motor's coil, 4 amps of current will flow. In other words
>it has 0.75 ohms resistance.

Oops! I think I was being too subtle.

The original post was in reference to the current required from a power
supply.

No need for a 10amp 60 volt supply--that's 600W, enough to heat
a small room.

If three motors draw 10A max. at 3V, then one would either need
a 3V 10A supply (not-recommended, low high-speed torque)

OR

a 60V supply (20 times the voltage) at 0.5 A (1/20th the current)

A supply that delivers 60V at 10A is overkill.
(I think 60V at 2A would provide a reasonable power margin.)




>> 10A x 60 V = 600W or 200W per motor.
>> 200W / 3V = 66.6 A per motor.
>>
>> Uh-oh, somethings not right!

Discussion Thread

NCS 2002-02-14 14:17:05 UTC Re: [CAD_CAM_EDM_DRO] Re: ...power... rsgoldner 2002-02-14 14:32:29 UTC Re: ...power... (Need Mariss) mariss92705 2002-02-14 14:56:05 UTC Re: ...power... mariss92705 2002-02-14 15:17:13 UTC Re: ...power... (Need Mariss) rsgoldner 2002-02-14 15:27:35 UTC Re: ...power... (Need Mariss) studleylee 2002-02-14 15:46:26 UTC Re: ...power... Gecko ready stuff...FYI dave_ace_me 2002-02-14 17:23:38 UTC uh, Mariss, can you clear up my confusion ? mariss92705 2002-02-14 17:57:53 UTC Re: uh, Mariss, can you clear up my confusion ? ccs@m... 2002-02-14 19:15:43 UTC Re: [CAD_CAM_EDM_DRO] uh, Mariss, can you clear up my confusion ? dave_ace_me 2002-02-14 20:09:27 UTC Re: uh, Mariss, can you clear up my confusion ? mariss92705 2002-02-14 22:17:24 UTC Re: uh, Mariss, can you clear up my confusion ? Jon Elson 2002-02-14 23:12:05 UTC Re: [CAD_CAM_EDM_DRO] Re: ...power... dave_ace_me 2002-02-15 05:06:57 UTC Re: uh, Mariss, can you clear up my confusion ? NCS 2002-02-21 14:47:27 UTC Re: [CAD_CAM_EDM_DRO] Re: ...power...