Stator rectifier burned up

Discussion in 'General VFR Discussions' started by rickeyer, May 23, 2017.

  1. vegaquark

    vegaquark New Member

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    Don't worry, we are here to help each other and learn.
    Afaik both of them are MOSFET wich stands for the type of technology used on the transistors (with helps improve switching speed from conducting to battery to conducting to stator/earth (shunting) or not conducting at all (on series regulator)) , but they are arrenged in different ways (shunting or series)
    There was a video talking on this MOSFET thing, wich is even more important than the fact of shunt or series regulator because if you use mosfet, transition times and thus heat on the regulator will be lower.
    This is the video https://www.youtube.com/watch?v=mEr6xSGLC48
    But the video calls shunt to the old type of SCR (Silicon Controlled Rectifier) shunt type rectifiers, and MOSFET to the new shunt MOSFET based rectifiers... Anyway both of them are shunt type regulators.
    Series regulator does not switch between shortcircuit to ground or conducting to battery, but open circuit and conducting to battery.
     


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  2. OOTV

    OOTV Member

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    It's all good. I think the other important take away from this and other post of similar ilk, is use quality components! :nod:
     


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  3. Allyance

    Allyance Member

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    According to Roadstercycle, the Series type R/R are best suited for racers who disconnect their lights, thus drastically reducing the load. With shunt types, all that current that would go to the lights, would get shunted to ground, thus producing more heat. Stock systems on bikes are designed to be balanced, keeping the load near the output of the R/R to reduce current shunted to ground. Why aren't all R/Rs series? don't know.
     


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  4. vegaquark

    vegaquark New Member

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    Should be because of high tension peaks generated on coils when setting them to open circuit after asking amps from them. That's how spark plugs generate their sparks, using a coil and suddenly opening the circuit after the coil is charged.
    The stator is full of coils, and insulation on them have limits. Series are good for low power consuption because fewer sparks would happen, but not suitable for heavy loads because of this.
    Also series stators wont add any drag to the crankshaft when you dont demand power from them while shunting will drag constantly (less than 1hp at 5000rpm, but there it is)
     


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  5. squirrelman

    squirrelman Member

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    nothing from china !

    :playful:
     


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