1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

12VDC Geared Motor Battery Advice

Discussion in 'Electrics UK' started by Reedswood, 8 Sep 2013.

  1. Reedswood

    Reedswood

    Joined:
    24 Jul 2012
    Messages:
    28
    Thanks Received:
    0
    Location:
    Sussex
    Country:
    United Kingdom
    I've just bought a wired Geared Motor 12VDC 8RPM which I'd like to use as part of a rotating spit set up, and wonder what would be the best battery to hook it up with and use for maximum output; I did see info on this elsewhere, but lost the link on my browser crash, so just hoping to get some advice on this to ensure I don't burn it out!

    Thanks!
     
  2. Sponsored Links
  3. Ian2008

    Ian2008

    Joined:
    10 Mar 2008
    Messages:
    71
    Thanks Received:
    15
    Location:
    Norfolk
    Country:
    United Kingdom
    Without the rating of the motor it is not possible to help.
    what is the motor rating, it will (should) be on a plate or sticker on the motor.
    With this info we can help
     
    • Thanks Thanks x 1
  4. big-all

    big-all

    Joined:
    12 Jul 2004
    Messages:
    18,322
    Thanks Received:
    1,406
    Location:
    Surrey
    Country:
    United Kingdom
    for example if your motor is about 1 amp/12watt will run for around 6h30-7h on a 7.2 ah battery

    you will only burn out the motor if you overload it
    12v is the engine and ah is the fuel tank
     
    • Thanks Thanks x 1
  5. Reedswood

    Reedswood

    Joined:
    24 Jul 2012
    Messages:
    28
    Thanks Received:
    0
    Location:
    Sussex
    Country:
    United Kingdom
    Hi, and thanks for the replies...it's this one I've got:

    [​IMG]
     
  6. big-all

    big-all

    Joined:
    12 Jul 2004
    Messages:
    18,322
    Thanks Received:
    1,406
    Location:
    Surrey
    Country:
    United Kingdom
    you need to know the power consumption to know the battery required
    but on such a small motor a 7 ah battery would should last the average bbq length off around 4hrs but purely a guess without the power consumption figures
     
    • Thanks Thanks x 1
  7. JohnW2

    JohnW2

    Joined:
    28 Jan 2011
    Messages:
    43,878
    Thanks Received:
    2,772
    Location:
    Buckinghamshire
    Country:
    United Kingdom
    Indeed, but whether such a tiny motor even with its gearing, would be able to turn a significantly loaded BBQ spit is, I would have thought, a less certain matter.

    Kind Regards, John
     
  8. big-all

    big-all

    Joined:
    12 Jul 2004
    Messages:
    18,322
    Thanks Received:
    1,406
    Location:
    Surrey
    Country:
    United Kingdom
    a gearing off several hundred to 1 even several thousand to one suspect it will have the power if not the strength in the gearing
     
    • Thanks Thanks x 1
  9. winston1

    winston1

    Joined:
    11 Jan 2010
    Messages:
    5,935
    Thanks Received:
    436
    Location:
    London
    Country:
    United Kingdom
    Very unlikely. AH capacities are quoted at the 20 hour rate, i.e. your 7.2AH bayberry would last 20 hours at 0.36A. At higher loads the capacity drops.
     
  10. Sponsored Links
  11. JohnW2

    JohnW2

    Joined:
    28 Jan 2011
    Messages:
    43,878
    Thanks Received:
    2,772
    Location:
    Buckinghamshire
    Country:
    United Kingdom
    Gearing will not increase the power, only the torque, but you may be right. However, I definitely would not out any money on it!

    Kind Regards, John
     
    • Thanks Thanks x 1
  12. big-all

    big-all

    Joined:
    12 Jul 2004
    Messages:
    18,322
    Thanks Received:
    1,406
    Location:
    Surrey
    Country:
    United Kingdom
    i fully agree unless it is specifically made for the purpose off rotating several kilos of badly balanced meat it will fail
     
  13. Jackrae

    Jackrae

    Joined:
    20 Nov 2012
    Messages:
    2,107
    Thanks Received:
    349
    Location:
    Dumfriesshire
    Country:
    United Kingdom
    Plus the heat travelling up the spit shaft will melt the plastic gear wheels that model motors invariably contain
     
  14. mikeyd

    mikeyd

    Joined:
    17 Jul 2007
    Messages:
    783
    Thanks Received:
    75
    Country:
    United Kingdom
    You can not burn it out unless yo give it more than 12V.
    We can't say how much current or power it needs. The data plate you showed missed that important detail out.

    Post a picture, and we'll have a guess. Or have another look at the spec's and if there are any figures stating Amps or Watts, or even HP, then reply.
     
  15. JohnW2

    JohnW2

    Joined:
    28 Jan 2011
    Messages:
    43,878
    Thanks Received:
    2,772
    Location:
    Buckinghamshire
    Country:
    United Kingdom
    I'm not so sure about that, if it grinds to a halt, under power, due to the strain of trying to rotate the hog!

    Kind Regards, John
     
  16. big-all

    big-all

    Joined:
    12 Jul 2004
    Messages:
    18,322
    Thanks Received:
    1,406
    Location:
    Surrey
    Country:
    United Kingdom
    are you saying the battery would be far more inefficient at 1 amp ??
    i have made the assumption off 3-10% loss at 1 amp ??
     
  17. winston1

    winston1

    Joined:
    11 Jan 2010
    Messages:
    5,935
    Thanks Received:
    436
    Location:
    London
    Country:
    United Kingdom
    Yes.
     
Loading...

Share This Page