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Thread: The task (lawn mower topic)

  1. #61

    Re: The task (lawn mower topic)

    That's not too bad. Although 190 F *is* hot enough to congeal an egg ... but not hot enough to destroy most linear ICs like a regulator (typically rated to 150C or so for junction temperature.)

  2. #62

    Re: The task (lawn mower topic)

    jwatte, seems it tops out at 190F with heavy mowing, hilly terrain. when on flat blacktop 175F.

    the only problem with having unlimited batteries, is you then end up adding things like computers,
    compasses, gyros, GPS, ultrasonic.

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  3. #63

    Re: The task (lawn mower topic)

    ... radars, railguns, electric arc based armor, ...

    :-D

  4. #64

    Re: The task (lawn mower topic)

    ... radars, railguns, electric arc based armor, ...
    jwatte, I was thinking more like big 110vac inverter for backup power for when the lights go out, or a 110vac weed wacker.

    but, lidar looks like something that would be fun to play with.

  5. #65

    Re: The task (lawn mower topic)

    ... radars, railguns, electric arc based armor, ...
    jwatte, lucky for me I got all that kind of stuff out of my system as a youth.
    my first job in electronics back in the mid 70's was fixing radar guided missiles for the army, so now I think
    shoveling snow and cutting grass, but my mind is wondering towards automating farm equipment.

  6. #66

    Re: The task (lawn mower topic)

    with the failure of 2 external fan alternators in 2 seasons I installed a internal fan type.
    it does run much cooler (160deg).

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  7. Re: The task (lawn mower topic)

    Quote Originally Posted by Tommy_T View Post
    with the failure of 2 external fan alternators in 2 seasons I installed a internal fan type.
    it does run much cooler. (160deg).

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    Why did you stop updating this topic? You have a fluent expression. Did the fan types you installed managed to cool?

  8. #68

    Re: The task (lawn mower topic)

    Did the fan types you installed managed to cool?
    danniel, yes the internal fan type alternator did run much cooler then the external fan type.

    With the external fan type alternator I would have to monitor the alternator temperature very closely
    and stop frequently to let it cool down before continuing mowing to keep from burning it up(220deg).

    with the internal fan type alternator installed I was able to mow continually.

    but even with the internal fan type alternator the 500cfm blower are still required to keep the alternator
    within operating temperature.

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  9. #69

    Re: The task (lawn mower topic)

    but even with the internal fan type alternator the 500cfm blower are still required to keep the alternator
    within operating temperature.
    That's actually pretty crazy. When a car battery is low, the alternator will have to produce a fair amount of current for a fair amount of time; I wonder if you can kill the alternator in your car by doing that on a hot day?

  10. #70

    Re: The task (lawn mower topic)

    jwatte, if a cars cooling fan failed, and something in the charging system shorted to ground( causing a constant 40Amp draw)
    and the car moved at very slow pace(lawn mower speed), I could see the alternator failing.

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