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Posted by Greg on August 21, 2006, 6:07 pm
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> Also, it turns out there are 2-pole and 4-pole motors. What on earth is
> all that about? I was only just coming to terms with the idea of star
> and delta winding. Nobody mentions what their motor is so I assume that
> can be adjusted internally to either configuration.
As no one has mentioned it, no you can't change the number of poles
internally, a motor is wound one way or the other, the more poles the slower
it turns for a given mains frequency.
Greg
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Posted by Peter Harrison on August 21, 2006, 6:14 pm
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Greg wrote:
>
>> Also, it turns out there are 2-pole and 4-pole motors. What on earth is
>> all that about? I was only just coming to terms with the idea of star
>> and delta winding. Nobody mentions what their motor is so I assume that
>> can be adjusted internally to either configuration.
>
> As no one has mentioned it, no you can't change the number of poles
> internally, a motor is wound one way or the other, the more poles the slower
> it turns for a given mains frequency.
>
> Greg
>
>
I see.
I was thinking of the star vs delta winding pattern which some sources
suggest is a common thing to have configurable by the user.
Pete Harrison
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Posted by John Stevenson on August 21, 2006, 6:19 pm
Please log in for more thread options On Mon, 21 Aug 2006 22:14:20 GMT, Peter Harrison
>Greg wrote:
>>
>>> Also, it turns out there are 2-pole and 4-pole motors. What on earth is
>>> all that about? I was only just coming to terms with the idea of star
>>> and delta winding. Nobody mentions what their motor is so I assume that
>>> can be adjusted internally to either configuration.
>>
>> As no one has mentioned it, no you can't change the number of poles
>> internally, a motor is wound one way or the other, the more poles the slower
>> it turns for a given mains frequency.
>>
>> Greg
>>
>>
>I see.
>
>I was thinking of the star vs delta winding pattern which some sources
>suggest is a common thing to have configurable by the user.
>
>Pete Harrison
Star Delta only applies to 3 phase motors.
--
Regards,
John Stevenson
Nottingham, England.
Visit the new Model Engineering adverts page at:-
http://www.homeworkshop.org.uk/
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Posted by John Stevenson on August 21, 2006, 6:23 pm
Please log in for more thread options On Mon, 21 Aug 2006 22:19:19 GMT, John Stevenson
>On Mon, 21 Aug 2006 22:14:20 GMT, Peter Harrison
>
>>Greg wrote:
>>>
>>>> Also, it turns out there are 2-pole and 4-pole motors. What on earth is
>>>> all that about? I was only just coming to terms with the idea of star
>>>> and delta winding. Nobody mentions what their motor is so I assume that
>>>> can be adjusted internally to either configuration.
>>>
>>> As no one has mentioned it, no you can't change the number of poles
>>> internally, a motor is wound one way or the other, the more poles the slower
>>> it turns for a given mains frequency.
>>>
>>> Greg
>>>
>>>
>>I see.
>>
>>I was thinking of the star vs delta winding pattern which some sources
>>suggest is a common thing to have configurable by the user.
>>
>>Pete Harrison
>
>Star Delta only applies to 3 phase motors.
Oops didn't read the first post correctly, thought we were talking
about single phase.
--
Regards,
John Stevenson
Nottingham, England.
Visit the new Model Engineering adverts page at:-
http://www.homeworkshop.org.uk/
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Posted by Andrew Mawson on August 21, 2006, 6:25 pm
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> >Greg wrote:
> >>
> >>> Also, it turns out there are 2-pole and 4-pole motors. What on
earth is
> >>> all that about? I was only just coming to terms with the idea of
star
> >>> and delta winding. Nobody mentions what their motor is so I
assume that
> >>> can be adjusted internally to either configuration.
> >>
> >> As no one has mentioned it, no you can't change the number of
poles
> >> internally, a motor is wound one way or the other, the more poles
the slower
> >> it turns for a given mains frequency.
> >>
> >> Greg
Do I not remember 'pole switching motors' that varied the speed by
switching the number of poles? iirc my 23 Swiss Launderette washing
machines inherited when I bought my shops used this system to give
three speeds. I scrapped them in the first year as they were over 30
years old and I thought it unsafe that the local kids could poke
fingers through the rust holes in the panels <G>
AWEM
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> all that about? I was only just coming to terms with the idea of star
> and delta winding. Nobody mentions what their motor is so I assume that
> can be adjusted internally to either configuration.