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garg29
Joined: 17 Nov 2004
Posts: 277
Helped: 3
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 16 Dec 2004 8:28 ac motor speed control |
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hi friends,
me want to design a three phase ac motor speed controller.........the motor ratings are: three phase, ac, 220v,50hz,960rpm,2hp ,induction motor.
please help me out guys ...how to proceed from scrap....should i use traic or igbt'sor what else.[/img]
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pixel
Joined: 16 Sep 2004
Posts: 569
Helped: 59
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| 16 Dec 2004 8:49 Re: ac motor speed control |
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You can controll an AC motor with a v/f or vector regulation.
v/f is more easily, and it usually cold be realiyed on a microcontroller.
Vector controll is a modern approach , which gives much better results, but it needs more programming effort, and usually a specialized DSP.
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IanP
Joined: 05 Oct 2004
Posts: 6347
Helped: 1505
Location: West Coast
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| 16 Dec 2004 10:21 Re: ac motor speed control |
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Here is my advice: DON'T DO IT !!!
It is quite complicated and complex issue and if you can buy a off-the-shelf controller for $300+ it will be 10+++ times cheaper than a controller (little chanses for final success...) you are trying to design and construct..
Go to the beach, mate, don't wast your time !!!
I know, sounds terrible, but it is true, believe me...
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metal
Joined: 21 Dec 2004
Posts: 366
Helped: 13
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| 28 Dec 2004 11:20 ac motor speed control |
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Hello
You can use the diac/thyristor, cause I think you will have problems when using triac.
Try to see the datasheets of TCA785, I remember I have seen some thing about 3-phase motor controlling, here you may use triac, don't know why
Regads
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