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JIJESH S NAIR
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Join Date: Aug 2007
Posts: 3

Cycloconverter

08/18/2007 6:46 AM

How can I change the freequancy of 3phase circuit for controling the speed of a 3phase induction motor?
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Nishant
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Join Date: Aug 2007
Location: INDIA
Posts: 58
#1

Re: Cycloconverter

08/18/2007 4:11 PM

Hi,

U can use frequency Controller.

A variable-frequency drive (VFD) is a system for controlling the rotational speed of an alternating current (AC) electric motor by controlling the frequency of the electrical power supplied to the motor. A variable frequency drive is a specific type of adjustable-speed drive. Variable-frequency drives are also known as adjustable-frequency drives (AFD), variable-speed drives (VSD), AC drives, micro drives or inverter drives. Since the voltage is varied along with frequency, these are sometimes also called VVVF (variable voltage variable frequency) drives.

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argentox
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Join Date: Jul 2010
Posts: 12
#6
In reply to #1

Re: Cycloconverter

08/17/2010 7:21 AM

Do you know what type of drive is MOST efficient? ...and why?

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FKIA
Power-User

Join Date: Jul 2007
Location: Somewhere in the hills of Pennsylvania, I think.
Posts: 246
Good Answers: 4
#2

Re: Cycloconverter

08/19/2007 12:00 AM

Just purchase a VFD controller sized for your application and install it per the manufacturer's instructions.

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miketheboilerguy
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Join Date: Mar 2007
Location: South East of Las Vegas just far enough to see the lights but far enough to not hear the coins falling
Posts: 282
Good Answers: 8
#3

Re: Cycloconverter

08/19/2007 12:58 AM

Try looking for a variable speed/frequency drive.

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FKIA
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Join Date: Jul 2007
Location: Somewhere in the hills of Pennsylvania, I think.
Posts: 246
Good Answers: 4
#4
In reply to #3

Re: Cycloconverter

08/19/2007 1:52 PM

Looking is easy. Finding one for this fellow's application is extemely difficult as he didn't specify the electrical supply, nor the motor size and it's electrical requirements. Sorry, but I couldn't resist.

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double_j_b
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United States - Member - I am a Yankee Doodle Boy. Engineering Fields - Manufacturing Engineering - Old School is the best school. Safety - ESD - Safety Mgr that keeps the peace Hobbies - DIY Welding - My Motto:

Join Date: Jan 2007
Location: Broken Arrow, OK, USA
Posts: 838
Good Answers: 26
#5

Re: Cycloconverter

08/20/2007 5:30 PM

I have 2 VFD's running my discharge and return fans on my HVAC unit.

Why 2 you ask??

We want to control the static pressure in both the ductwork and in the office space itself for reasons that are wayy to complicated to get into. I would have to write a book on it.

Suffice it to say they work fantastically and flawlessly.

The company is ABB you might try starting here

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argentox (1); double_j_b (1); FKIA (2); miketheboilerguy (1); Nishant (1)

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