Flashing a generator

Discussion in 'The Garage' started by tundra61, Nov 5, 2012.

  1. papalobster

    papalobster With Gusto!

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    Um

    Honda does not make any brushless generators.

    All Baldor Generators I worked on from the 1.7kw PC17 to the TS250 (that largest they made while I was employed there) were all brushless as well. No magnets in any of them.
    #21
  2. DirtyDog

    DirtyDog Omnia mea mecum porto

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    :lurk

    I tried to do the 12V battery trick (suggested by my manual... like jump-starting) AND the reverse corded drill trick to excite mine. Neither worked. Took it apart and the rectifier board was fried. Don't know if it was fried before I tried to excite it or not.

    While trying the 12V battery method, my 110v incandescent bulb illuminated a bit, but didn't stay on. Then it was dead after that.

    Once my new rectifier board arrives, I'll re-diagnose. Hope to have a reliable generator for the potentially shitty winter.

    Still 80 degrees F here.:jkam Should be freezing by next week. :vardy
    #22
  3. Beezer

    Beezer Long timer

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    there are several ways to do the excitation, but on most, the excitation voltage, no matter where it comes from, is fed into a rectifier to convert it to DC, then regulated and sent to coils that excite the main generator windings. the main windings also feed into the control regulator.

    put another way, the initial excitation is from a permanent magnet field and causes a small AC voltage to be generated in the main windings. that voltage is fed into a rectifier/regulator to power the electromagnetic field which produces a much larger excitation, and drives the generator up to system voltage. then system voltage is (also) fed into the R/R circuit for the field, so the main output is also powering it's own field

    I would NOT put 120VAC on a generator that is set up to deliver 12VDC.
    #23
  4. ttpete

    ttpete Rectum Non Bustibus

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    My big generator is an ex-military unit driven by a 4 cylinder Jeep engine, and it has a separate 12 volt generator on the end for excitation and for battery charging. It also cranks the engine up by running it as a motor from the battery. Output is 240/120 volts single phase 3 wire, the same as the house wiring. It only runs at 1800 rpm, so it's very quiet.
    #24
  5. Peanuts

    Peanuts Long timer

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    My standby Honda generator has not been used for a couple of years. I guess I need to dig it out from the back of the shed..... thanks for the advice :)
    #25
  6. DirtyDog

    DirtyDog Omnia mea mecum porto

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    Update- got my gen working today after replacing some parts. I used the corded drill flashing method to re-magnetize the field. Worked like a damn charm.

    Highly recommended for simplicity.
    #26
  7. buickid

    buickid Lets ride!

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    For the record, what was busted?
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  8. DirtyDog

    DirtyDog Omnia mea mecum porto

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    See above. And yes, it's now down to freezing (at night).
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  9. buickid

    buickid Lets ride!

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    Whoops, missed that bit. Stay warm. Forecast calls for a low of 68F on Thursday night here, yikes. :D
    #29
  10. ttpete

    ttpete Rectum Non Bustibus

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    My condolences.......:lol3

    Maybe you'll get a volcanic eruption to warm things up......:rofl
    #30
  11. DirtyDog

    DirtyDog Omnia mea mecum porto

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    Yeah, I rode home from our local, weekly ADV event last night and it was 48 deg. It's the adjusting to winter process that really sucks.

    Anyhow. Sorry for the hi-jack
    #31