Do all battery chargers hum?

[rwoofer]

Mine stops me going to sleep so I have to turn it off at night....

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[halcyon]

No, depends on design and installation.

Brian

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[kilkerr1]

Ours does this. It seems the longer it's on the louder it gets. The white noise fills the house and drives me mad so I, like you, have to turn it off. Don't know if it's meant to do that or what...



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[rwoofer]

How does the installation effect it ie. is there something I can do about my installation that will cure it?

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[Talbot]

easy, install it in the shed down the bottom of the garden, Guarantee the hum will not then be so noticeable /forums/images/icons/smile.gif

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[Twister_Ken]

Most smell quite neutral, but if it's a problem, try a squirt of Lynx.

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[cameronke]

The hum comes from the transformer and is an indication of the quality of the transformer and the load upon it.

Higher quality transformers have good tight laminations (the interleaving plates of steel that surround the copper windings) and will be much quieter for a given load. Often a finished transformer is vacuum impregnated in varnish so (unfortunately) it is not possible to tighten the laminations.

Sorry cant help more

Regards
Cameron

<hr width=100% size=1>Work to live, live to sail

 

[Jeremy_W]

Only if they don\'t know the words NM

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[ColinW]

You can get battery chargers which use switched mode power supply technology. These don't have a transformer, so no hum. The bad news is they cost £100 and upwards!


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[rwoofer]

Must admit I have not noticed a difference with load - it always hums at the same loudness. I will listen more carefully.

By the way this is the boat charger which is a 40amp model charging 260amp/hour service batteries.

RB

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[halcyon]

Transformer battery charger's do not have to hum either, all a matter of design.

Brian

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[Magic_Sailor]

Depends when they last washed. nm.

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[ColinW]

Sorry, if it's the boat charger then it probably IS a switched mode design. Switched mode supplies don't usually hum but if they have a noisy cooling fan then that can sound similar. Another possibility is if you are connecting to shore via an isolation transformer. It might be the isolation transformer which is humming, not your charger.


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[denver]

hello,
Its worth noting that most battery chargers are cheap for what they are and one of the arears of money saving is the transformer.Since our mains frequency is 50Hz it rattles in tune to it, unless it is as your other writer surjests a switch mode type A quality trnsformer with those sort of ratings could cost uo to £50.
If it dri ves you to mad take it out of the charger and dip it in penertrating insulation varnish, that will shut it up hi. good luck
Colline



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[StugeronSteve]

Nope. There are a few that whistle. /forums/images/icons/smile.gif

<hr width=100% size=1>Think I'll draw some little rabbits on my head, from a distance they might be mistaken for hairs.

 

[Tekkie]

Leave the lyricks next to the charger

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[DogStar]

Re: Leave the lyricks next to the charger

My Sterling 4 stage charging panel is silent. My previous little Halfords job sounded like the missus was playing with her rabbit all the time. Very hard to sleep. It cost over a hundred quid, but I trust it a hell of a lot more. Will run off anything between 100 - 260 volts, too.

<hr width=100% size=1>I'd rather have a bottle in front of me than a frontal lobotomy!