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tomstephens
Associate

Join Date: Sep 2012
Posts: 27

3 Phase Fan, Large Industrial Model, As Generator

09/09/2012 1:05 PM

I have some large 3 phase fans that I would like to turn into DIY wind turbines . Have I any chance of getting current from the motor , in ' reverse ' , or should I fix a pulley on them to drive alternators , or is there a better way to do it ? Any advice very much appreciated . Tom , UK
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Joshi
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Join Date: Oct 2007
Location: India
Posts: 1246
Good Answers: 34
#1

Re: 3 phase fan , large industrial model , as generator

09/09/2012 1:28 PM

Consider if following could be an option.

Find a buyer for all your large fans, find a suitable wind turbine for your needs and buy it. Live happily there after.
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
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#2

Re: 3 Phase Fan, Large Industrial Model, As Generator

09/10/2012 3:53 AM

In order to turn a motor into a generator, one needs a magnetic field. Where will this come from, please?

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pnaban
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Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#3
In reply to #2

Re: 3 Phase Fan, Large Industrial Model, As Generator

09/10/2012 10:56 PM

You can run as induction generator excited by grid supply.

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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#6
In reply to #3

Re: 3 Phase Fan, Large Industrial Model, As Generator

08/29/2024 7:04 AM

Invitation declined.

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pritam
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Engineering Fields - Mechanical Engineering - New Member India - Member - New Member

Join Date: Aug 2008
Location: City of destiny, INDIA
Posts: 775
Good Answers: 67
#4

Re: 3 Phase Fan, Large Industrial Model, As Generator

09/19/2012 11:36 PM

It may be possible to run motor as generator, but fans as turbines will be highly inefficient.

We have an air (medium pressure) turbine connected with 3 phase 6.6 kV break generator connected to main supply grid. Ones air fails it acts like a motor, drawing current from grid, but direction of rotation does not change. It is not advisable, so machine trips with an interlock in a shortwhile.
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pnaban
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Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#5

Re: 3 Phase Fan, Large Industrial Model, As Generator

09/20/2012 7:45 AM

I remember watching one in "you tube".

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