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eltech
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Induction Motors

04/17/2011 6:27 PM

Can somebody please explain how a two speed motor eg. 2/6 pole motor can run in three speeds,
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JRaef
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#1

Re: Induction Motors

04/17/2011 6:50 PM

Because Off is a speed (zero speed)?

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Tornado
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#2

Re: Induction Motors

04/17/2011 7:02 PM

Have you tried prayer? Maybe God could explain this.

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rhkramer
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#3

Re: Induction Motors

04/17/2011 7:21 PM

Do you have a two speed 2/6 pole motor that runs at three different speeds?

Tell us more about it:

  • AC or DC?
  • If AC, single phase or three phase?
  • What are the three speeds?
  • What is it used for / in?
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Anonymous Poster #1
#4

Re: Induction Motors

04/17/2011 9:49 PM

If its SRIM use rotor rheostat control, if you can design it. I think its SCIM which reduce starting current for its 2 speed operation.
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eltech
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#5

Re: Induction Motors

04/18/2011 1:18 AM

I did some googling and found this info: consequent-pole motors-This is a three phase induction motor.

http://books.google.com.au/books?id=E9nP3VBRO6AC&pg=PA317&lpg=PA317&dq=what+is++consequent-pole+motors&source=bl&ots=y651iV7vD5&sig=LvWdUSpLWMX9v120iYFJ467ofNw&hl=en&ei=Kr6rTb6sFIeurAfDrJWnCA&sa=X&oi=book_result&ct=result&resnum=6&ved=0CCsQ6AEwBQ#v=onepage&q=what%20is%20%20consequent-pole%20motors&f=false
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rhkramer
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#6
In reply to #5

Re: Induction Motors

04/18/2011 7:29 AM

Wunderbar!

I'm not the OP, but it looks like an excellent answer to me--sounds like it is a 3 speed (and 3 phase) consequent pole motor as described on page 319 of that link (the 2nd page you can view, iirc).
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JRaef
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#7
In reply to #5

Re: Induction Motors

04/18/2011 9:20 AM

Technically? Wrong!

Here is what you asked:

"Can somebody please explain how a two speed motor eg. 2/6 pole motor can run in three speeds..." emphasis added.

What you have found is a three speed motor! Not a two speed motor run in 3 speeds. Had you asked the question properly many of us would have answered properly, i.e.

"Can somebody please explain how a two winding motor can run in three speeds?"

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Anonymous Poster (1); eltech (1); JRaef (2); rhkramer (2); Tornado (1)

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