Inverter noise

Discussion in 'Tech/Mech General' started by Happycampers1, Feb 10, 2015.

  1. Happycampers1

    Happycampers1 Read Only Funster

    Joined:
    Jun 18, 2014
    Messages:
    71
    Likes Received:
    29
    Location:
    St Leonards, Hampshire
    I have just fitted a 1500/3000w pure sine inverter to my leisure battery and it works fine except for a high pitched whine after a few minutes. Any ideas?
     
  2. gozomike

    gozomike Funster Life Member Life Member

    Joined:
    Mar 16, 2010
    Messages:
    872
    Likes Received:
    662
    Location:
    Warwickshire - sometimes - but not often
    That usually indicates the voltage going into the inverter is too low. How thick & long are the cables??
     
    • Like Like x 1
  3. hilldweller

    hilldweller Funster Life Member

    Joined:
    Dec 5, 2008
    Messages:
    26,431
    Likes Received:
    25,090
    Location:
    Macclesfield
    On full load it could flatten a battery in that time.
     
  4. Daifuse

    Daifuse

    Joined:
    Feb 20, 2013
    Messages:
    184
    Likes Received:
    310
    Location:
    Milford Haven
    Or your battery has a duff cell .......
     
  5. Borderland

    Borderland Funster

    Joined:
    Nov 5, 2014
    Messages:
    399
    Likes Received:
    2,117
    Location:
    Borders
    Inverters work at high frequency and sometimes can sound noisy. It is usually caused by the transformer windings if they have not been properly encapsulated or if the transformer housings are not securely fixed to pcb or chassis of equipment.
     
  6. pappajohn

    pappajohn Funster Life Member

    Joined:
    Aug 26, 2007
    Messages:
    29,463
    Likes Received:
    16,900
    Location:
    YO11 2BD
    Agreed with gozomike.

    Once the voltage drops below a preset level the low voltage alarm will sound.

    The higher the load via the inverter, the lower the available voltage regardless of the batteries off load voltage.
     
    • Like Like x 1
  7. gozomike

    gozomike Funster Life Member Life Member

    Joined:
    Mar 16, 2010
    Messages:
    872
    Likes Received:
    662
    Location:
    Warwickshire - sometimes - but not often
    Correct - that frequency is above that we can hear, once the voltage drops the frequency will drop to a frequency we can hear hence the sound we get.
     
    • Like Like x 1
  8. Gizmouk

    Gizmouk Funster

    Joined:
    Nov 6, 2013
    Messages:
    960
    Likes Received:
    1,711
    Location:
    Essex
    Let the wife back in out of the cold ? :roflmto::roflmto:
     
  9. Happycampers1

    Happycampers1 Read Only Funster

    Joined:
    Jun 18, 2014
    Messages:
    71
    Likes Received:
    29
    Location:
    St Leonards, Hampshire
    Checked the wife! Damn you are good!
     
  10. JeanLuc

    JeanLuc Funster

    Joined:
    Nov 17, 2008
    Messages:
    2,782
    Likes Received:
    1,857
    Location:
    Warwickshire
    To return to the original question from gozomike, how long and thick are the cables between inverter and battery(ies)? Also, what load are you drawing from the inverter (in watts) and how big is/are your leisure battery(ies)?
     
  11. makems

    makems Funster Life Member

    Joined:
    Sep 23, 2011
    Messages:
    2,616
    Likes Received:
    10,677
    Location:
    Ingleby Barwick,,Teesside
    Some inverters have a fan to cool them when under heavy load (ours does) could this be the source of the whining noise?
     
  12. Happycampers1

    Happycampers1 Read Only Funster

    Joined:
    Jun 18, 2014
    Messages:
    71
    Likes Received:
    29
    Location:
    St Leonards, Hampshire
    Thanks guys. The leisure battery is new "apparently" but as it is under warranty the dealer is going to replace it. The cables are the correct size and only about 12" long. I think it must be a low voltage issue as it is fine when the engine is running.
     
  13. davejen

    davejen Funster

    Joined:
    Aug 21, 2008
    Messages:
    1,244
    Likes Received:
    688
    Location:
    Kirkpatrick Fleming Dumfries
    Or, maybe there's a mouse inside?
    Cheers, Dave(y)
     
Loading...

Share This Page