Results 1 to 7 of 7

Thread: Inverter Beeping

  1. #1
    Maximum Bitrate
    Join Date
    Jun 2002
    Location
    Malaysia
    Posts
    624

    Inverter Beeping

    I have a problem with my inverter in that when I hit the brakes at night with the headlights and airconditioning on, the inverter beeps and shuts off. This also happens sometimes when I'm moving very slow.

    I'm guessing that this is because the voltage from the battery and alternator drops so low (below 11V) or so and that's why its giving me the alarm.

    Is there a fix for this? I've tried searching the forums but I cant find anything related to this specific problem, or else someone will have to teach me to select the right keywords =P

    I have however read related threads, some suggest using a voltage regulator (I'm thinking the LM7812) and some using a capacitor. But where do I connect these and what values do I use? Assume I have no basics in electronics at all.

    And oh yeah, if I put a capacitor/regulator at the inputs of the inverter, would that complete the circuit and be a cause to battery drain?

    THanks in advance.

  2. #2
    FLAC MP3DUB's Avatar
    Join Date
    Jan 2002
    Location
    Chicagoland, IL
    Posts
    1,783
    Heh, unfortunately, the only solution might be to get a bigger (higher powered) alternator. You might (as you said) try like a 1F capacitor between the battery and inverter to see if it will help, but it sounds like a prolonged power drop, and not just a dip.
    -Nick

    _____________________________
    Since when is insanity a bad thing?
    www.mp3vw.com

  3. #3
    Maximum Bitrate
    Join Date
    Jun 2002
    Location
    Malaysia
    Posts
    624
    You know, its not that everytime I hit the brakes the thing beeps. Its just when I press it for a prolonged period of time, like at a long traffic light. My battery registers about 14.1-14.3V without anything on after starting the car. Doesnt that sound about right?

    Is there like a voltage regulator that can buff up the voltage a little so that the inverter doesnt scream like it does?

  4. #4
    Maximum Bitrate
    Join Date
    Jan 2001
    Location
    Adelaide, SA, Australia
    Posts
    456
    I'd have a stab in the dark and suggest that your battry may be dieing. If it does it after prolonged use of the brake with the air-con / headlights / brakelights (plus carputer) on. Either that and/or the altenator is getting a little tired and not provding enough current to match your current draw.

    How do you have the inverter wired? acc line? directally off the battery?
    http://www.mp3vl.tk Plans and progress on my install - (Updated 28 June 02)
    Australian mp3car Portal
    mp3car related links Check them out / Add some
    mp3car FAQ - RTFF

    [########==]80% Assembling
    -=Current Progress: Working Sproggy supply, building box.=-

  5. #5
    FLAC MP3DUB's Avatar
    Join Date
    Jan 2002
    Location
    Chicagoland, IL
    Posts
    1,783
    Also, to see exactly whats going on with your elec system, hook up a multimeter to the system/cig adapater/anything to see how the voltage is fluxuating.
    -Nick

    _____________________________
    Since when is insanity a bad thing?
    www.mp3vw.com

  6. #6
    Rob
    Rob is offline
    Maximum Bitrate Rob's Avatar
    Join Date
    Aug 2001
    Location
    Missing In Action
    Posts
    779
    I had a simular problem, see here and I a bigger battery worked great.
    And you say people actually pay money for M$ Windows?
    www.mp3mini.co.uk (Does what it says on the URL) www.openclassic.co.uk (The new car, with zero rust!) www.rob-web.co.uk (My other site)
    Total re-design underway: on the whole progress is very slow as the car is taking up too much time :)

  7. #7
    Maximum Bitrate
    Join Date
    Jun 2002
    Location
    Malaysia
    Posts
    624
    When I bought the battery for my car (2-3 months ago) I bought the biggest one that could fit in my car heh. Even then they had to modify and adjust the battery stand so that I could put it in.

    But recently my alternator died out. And I replaced it with an old reconditioned alternator. That could be the cause of my problems. My inverter hasnt beeped in a long time though. I've been running at night with high beams and with the wipers on, even when I stayed stationary for 5 mins. I'm not really sure what I did except for wiring my inverter straight to the battery this time instead of through the cigarette lighter.

    I have a multimeter, it reads about 14.1-14.3V upon start-up, but drops to 12V with everything on except for the carpc.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •