Need help replacing this Inductor

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Mace_Hacker

Mace_Hacker

Member
Joined 2008
angelfire.com/poetry/sandcastle/
#1
I am pretty sure this would be called a common mode inductor...or choke?
It's on the power supply board of my shop window AC unit, (LG 18000 btu, 230v)
Had a "friend" helping me service it and...oops.
I got the inductor removed but I can not find it online based on numbers on sticker. I can't find schematics for psb either.
So, is there a way that I can determine the "value" of this inductor so I can order a replacement?
I do not have an induction meter...just a multimeter.
EDIT: The pin pitch is 10x13mm

Thanks in advance!!

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#3
It's an input filter choke. It is on the supply input side. Is it broken / open on the right side ? The AC unit will work fine if shorted, just for testing. On computer PSU's there are usually this type of filters soldered to the IEC plugs. Work out the A rating needed by looking at the fuses. If it is shorted, and the AC doesn't work something further is broken.
 
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#4
Sadly there will be other components also damaged - to melt a winding like that requires lots of current so replacing that switch mode transformer most probably will not solve your problem. Those transformers are designed uniquely for that application and are very unlikely to be "off the shelf". Best bet is to buy a complete replacement power supply unit for that AC from LG.
 
#5
Ok...for the record, it was damaged by my friend moving the loose board around and the inductor bumped against the housing....so it wasn't from normal use and component failure.
I don't have a generator...I do have a 50mhz scope but......I have yet to learn how to use it. lol
I can however...unwind the remaining coil that is undamaged and count the windings....if that would be helpful.
The fuse on the board popped when he arced the inductor. The fuse was T5A (250v 15A)
I am thinking I could "probably" get away with one close in value but, I have no idea the value.
Yes. Buying a new $65 psb would be the easiest thing to do but, not as much fun s fixing this for $10.00.
EDIT:
Below is a picture of the bottom. I didn't see this earlier. Bad lighting. Looks to read ( 5K 22 )
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#6
Ok. MAACO, from what I can find this looks to be pretty close to what I have. As I am want to say...Close enough for government work.

SS11VL-03550
Datasheet
Digi-Key Part Number 399-10538-ND
Manufacturer KEMET
Manufacturer Part Number SS11VL-03550
Description CMC 55MH 300MA 2LN TH
Detailed Description 55mH @ 1kHz 2 Line Common Mode Choke Through Hole 300mA DCR 4.1Ohm
 
#7
MAAC0 said:
It's an input filter choke. It is on the supply input side. Is it broken / open on the right side ? The AC unit will work fine if shorted, just for testing. On computer PSU's there are usually this type of filters soldered to the IEC plugs. Work out the A rating needed by looking at the fuses. If it is shorted, and the AC doesn't work something further is broken.
Click to expand...


Indeed, the actual value of that line choke/filter isn't important.
What is important is the current-carrying capability and mounting arrangement.
 
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