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Groups > sci.electronics.design > #461580 > unrolled thread
| Started by | "Dave, I can't do that" <davenpete@gmail.com> |
|---|---|
| First post | 2017-05-24 12:47 -0700 |
| Last post | 2017-05-29 23:30 -0400 |
| Articles | 1 on this page of 21 — 12 participants |
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How to find max-current? "Dave, I can't do that" <davenpete@gmail.com> - 2017-05-24 12:47 -0700
Re: How to find max-current? makolber@yahoo.com - 2017-05-24 13:42 -0700
Re: How to find max-current? "Dave, I can't do that" <davenpete@gmail.com> - 2017-05-25 12:12 -0700
Re: How to find max-current? bitrex <bitrex@de.lete.earthlink.net> - 2017-05-24 20:16 -0400
Re: How to find max-current? Phil Allison <pallison49@gmail.com> - 2017-05-24 17:54 -0700
Re: How to find max-current? Don Y <blockedofcourse@foo.invalid> - 2017-05-24 17:56 -0700
Re: How to find max-current? "Dave, I can't do that" <davenpete@gmail.com> - 2017-05-25 12:10 -0700
Re: How to find max-current? Don Y <blockedofcourse@foo.invalid> - 2017-05-25 13:18 -0700
Re: How to find max-current? John S <Sophi.2@invalid.org> - 2017-05-24 22:54 -0500
Re: How to find max-current? "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-05-25 08:45 -0500
Re: How to find max-current? "Dave, I can't do that" <davenpete@gmail.com> - 2017-05-25 12:07 -0700
Re: How to find max-current? Neon John <no@never.com> - 2017-05-27 15:38 -0400
Re: How to find max-current? tabbypurr@gmail.com - 2017-05-27 13:49 -0700
Re: How to find max-current? krw@notreal.com - 2017-05-27 20:04 -0400
Re: How to find max-current? tabbypurr@gmail.com - 2017-05-27 17:34 -0700
Re: How to find max-current? Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2017-05-28 09:56 -0400
Re: How to find max-current? Neon John <no@never.com> - 2017-05-28 18:55 -0400
Re: How to find max-current? Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2017-05-28 23:15 -0400
Re: How to find max-current? Neon John <no@never.com> - 2017-05-29 12:05 -0400
Re: How to find max-current? Neon John <no@never.com> - 2017-05-28 18:52 -0400
Re: How to find max-current? Bob Engelhardt <BobEngelhardt@comcast.net> - 2017-05-29 23:30 -0400
Page 2 of 2 — ← Prev page 1 [2]
| From | Bob Engelhardt <BobEngelhardt@comcast.net> |
|---|---|
| Date | 2017-05-29 23:30 -0400 |
| Message-ID | <ogip1k01pu@news4.newsguy.com> |
| In reply to | #461580 |
On 5/24/2017 3:47 PM, Dave, I can't do that wrote: > ... > I there some rule of thumb by which I can guesstimate the max current I can **safely** put into them to get 1/3-hp or 1/2-hp? ... The current limit is determined by the heat it generates. Motors fall into classes according to the heat rise that they can tolerate. You might be able to guess the class of your motor, or you could assume some middle-of-the-ground. I used 100C for a motor that I tested. I measured the temperature by measuring the resistance of the windings. Or, to put it more accurately, I measured the change in temperature by measuring the change in resistance. I did this while applying the max current that I had to the motor with the rotor locked. Bob
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