Question about Sqealing Inductor.

[punisher69]

I have a pc power and cooling psu. and for some reason a inductor inside it decided to start sqealing. Now i would like to repair this myself and would like some advise from some electronic engineers if there is any on this site. i was thinking of using a polystyrene cement/compound to apply to the coil to stop the vibrations (which is what is causing the squeal). The squealing is harmless but it's annoying as hell to listen to.

Please help.

Thanks.

[saaya]

hmmmmm i had this prob on a mobo coil and covered it in superglue which helped a lot :D i wouldnt really recommend that though... did you contact the pc power guys and asked if they can fix this?

[cadaveca]

hot glue, superglue, etc will usually end squeal...most time cuases by mechanical moving of coil parts; making it so parts can't move makes squeal go away.

[punisher69]

hmmmmm i had this prob on a mobo coil and covered it in superglue which helped a lot :D i wouldnt really recommend that though... did you contact the pc power guys and asked if they can fix this?

I did. They told me that is it most likely one of the inductors that is squealing and i could send it in for repair.

problem #1 is i have removed the case and the cables have been resleeved.

Problem #2 is i don't have a backup PSU so i would be without a comp for quite some time.

#3 i have removed the case and verifyed it is a squealing inductor.

@ cadaveca

The only thing i have with hot glue is that this inductor in the PSU usually gets hot so hotglue would not work well in this case. i need a cement that will withstand high temps. now that i type that I'm thinking of mabey looking @ some high temp RTV sealents. I don't know what superglue is like for withstanding high temps. I'll look into it.

[saaya]

or use that sticky stuff thats used to glue screws so they dont fall out or to seal them so you can see if the screw has been removed. that stuff can take high temps and glues pretty well.

[punisher69]

or use that sticky stuff thats used to glue screws so they dont fall out or to seal them so you can see if the screw has been removed. that stuff can take high temps and glues pretty well.

That would work quite well. Do you know what that stuff is called?

[noXqzs]

loctite?

[GripS]

loctite?

thats the stuff. Only problem is it's very liquid like until it dries. I'm thinking some silicone should do the trick.

[V2-V3]

thats the stuff. Only problem is it's very liquid like until it dries. I'm thinking some silicone should do the trick.



Silicone, Just lay a bead of Silicone on the Inductor.

[saaya]

well the thing is, some coils get quite hot and im not sure if covering them with glue will make them run too hot... thats why id def recommend you to keep your emails with pcpnc where they told you its ok to do this. just incase one guy tells you its ok, later you need an rma for the psu and another guy refuses it cause you covered one of the coils in glue :D

just do what vga and mobo mfgs do with inductors to prevent this, use a thick shrink-hose and put it over the coil and then heat it up so it pulls together and holds the coil tight.

or you put some cover around it and then fill it with this loctite stuff.

[punisher69]

i used some shink-tube and it has cut down the noise a little. I'm looking into possibly getting a larger PSU. As i am running this current 510 deluxe near max all day.

[celemine1Gig]

The real problem is: Squealing means that the inductor is actaully vibrating/resonating a bit. Which means it's causing mechanical stress on the solder joint which could lead to failure sooner or later. I'd try a solution as follows:

Desolder the squealing inductor (if you know what you are doing; otherwise keep your hands off the inside of any PSU) add some soft material (silicon, foam, whatever is suiteable) inbetween the inductors solder pads, so the coil then directly sits on that pad which should then dampen the vibration. Perhaps even the resoldering alone will decrease the resonating. ;)