Saturated core in inductor

peranders · 01:25 PM

I have a 3-phase inductor which will become a bit heavy if it is specified for 16 A, 3 x 400 VAC. The thing is that the equipment only consumes approx. 10 A so what happens with the temperature if the winding is OK regarding cross section but the core goes into saturation? The inductance will of course be reduced but what happen more? Anything dangerous such as hot core?

My interest is focused on the big beast in the picture, 10 mH at 16A, 30 kg.

If you wonder: The picture is taken with an iPhone, with the "bad" 2 Mpx camera.

Eva · 27th August 2009, 04:05 PM

What is the purpose of the inductor?

peranders · 27th August 2009, 04:15 PM

It's for an old motor drive to reduce harmonics. The motor is a 3-phase motor. New regulations stipulates more clean current than before.

Juergen Knoop · 27th August 2009, 06:13 PM

I don't understand your problem?

A 16A motor choke can be used with motors up to 16A.
It may get hot then, but it is the constructors duty to provide adequate ventilation.
Regards

peranders · 27th August 2009, 06:30 PM

Since the customer is keen on ordering an inductor as small as possible is my question is in my first post. Right now I don't have the opportunity to test so I asked here if anyone had some insight in 50 Hz magnetic parts.

Juergen Knoop · 27th August 2009, 06:36 PM

then order a 10A choke...
regards

peranders · 27th August 2009, 08:24 PM

The question was what happened with the core saturated but I'll guess you don't have a clue about the answer.

Juergen Knoop · 27th August 2009, 08:33 PM

cores always suffer from increased losses, when saturated.
Thats basic EE...I still don't understand your problem?

regards

infinia · 27th August 2009, 09:10 PM

Uhh adding a saturated cored inductor is sure to distort the mains even more than the motor alone. Counter productive.

infinia · 27th August 2009, 09:38 PM

Can you find the cause first. is the neutral balanced OK. In the long run it maybe better to upgrade the controller/motor instead.

27th August 2009, 04:05 PM	#2
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	What is the purpose of the inductor? __________________ I use to feel like the small child in The Emperor's New Clothes tale

27th August 2009, 04:15 PM	#3
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	It's for an old motor drive to reduce harmonics. The motor is a 3-phase motor. New regulations stipulates more clean current than before. __________________ /Per-Anders (my first name) or P-A as my friends call me

27th August 2009, 06:30 PM	#5
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Since the customer is keen on ordering an inductor as small as possible is my question is in my first post. Right now I don't have the opportunity to test so I asked here if anyone had some insight in 50 Hz magnetic parts. __________________ /Per-Anders (my first name) or P-A as my friends call me

27th August 2009, 08:24 PM	#7
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	The question was what happened with the core saturated but I'll guess you don't have a clue about the answer. __________________ /Per-Anders (my first name) or P-A as my friends call me

27th August 2009, 09:10 PM	#9
infinia diyAudio Member Join Date: May 2005 Location: Californication	Uhh adding a saturated cored inductor is sure to distort the mains even more than the motor alone. Counter productive. __________________ like four million tons of hydrogen exploding on the sun like the whisper of the termites building castles in the dust


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27th August 2009, 06:13 PM	#4
Juergen Knoop diyAudio Member Join Date: Jan 2007 Blog Entries: 3	I don't understand your problem? A 16A motor choke can be used with motors up to 16A. It may get hot then, but it is the constructors duty to provide adequate ventilation. Regards

27th August 2009, 06:36 PM	#6
Juergen Knoop diyAudio Member Join Date: Jan 2007 Blog Entries: 3	then order a 10A choke... regards

27th August 2009, 08:33 PM	#8
Juergen Knoop diyAudio Member Join Date: Jan 2007 Blog Entries: 3	cores always suffer from increased losses, when saturated. Thats basic EE...I still don't understand your problem? regards

27th August 2009, 09:38 PM	#10
infinia diyAudio Member Join Date: May 2005 Location: Californication	Can you find the cause first. is the neutral balanced OK. In the long run it maybe better to upgrade the controller/motor instead. __________________ like four million tons of hydrogen exploding on the sun like the whisper of the termites building castles in the dust

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