• Re: phases

    From Phil Hobbs@21:1/5 to jlarkin@highlandsniptechnology.com on Fri Jun 3 12:32:44 2022
    jlarkin@highlandsniptechnology.com wrote:
    If you take one of those triangular architects rulers, lay it on a
    table, put another ruler flat across the top, and rotate the
    triangular one, you can visualize full-wave rectifying a floating
    3-phase voltage source.



    Half-wave, surely. FW gives you six peaks per cycle.

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs
    Principal Consultant
    ElectroOptical Innovations LLC / Hobbs ElectroOptics
    Optics, Electro-optics, Photonics, Analog Electronics
    Briarcliff Manor NY 10510

    http://electrooptical.net
    http://hobbs-eo.com

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  • From jlarkin@highlandsniptechnology.com@21:1/5 to All on Fri Jun 3 09:20:38 2022
    If you take one of those triangular architects rulers, lay it on a
    table, put another ruler flat across the top, and rotate the
    triangular one, you can visualize full-wave rectifying a floating
    3-phase voltage source.



    --

    Anybody can count to one.

    - Robert Widlar

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  • From Ricky@21:1/5 to Phil Hobbs on Fri Jun 3 10:53:29 2022
    On Friday, June 3, 2022 at 12:32:58 PM UTC-4, Phil Hobbs wrote:
    jla...@highlandsniptechnology.com wrote:
    If you take one of those triangular architects rulers, lay it on a
    table, put another ruler flat across the top, and rotate the
    triangular one, you can visualize full-wave rectifying a floating
    3-phase voltage source.



    Half-wave, surely. FW gives you six peaks per cycle.

    The rulers give you six peaks per cycle. You have to pay attention to the symmetry of the top and bottom of the triangle rotating between flat surfaces. I believe the peak occurs when a corner of the triangle is pointing to the side and the other two
    corners are in a vertical line. The troughs are when either flat surface is touching two corners.

    --

    Rick C.

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  • From John Larkin@21:1/5 to pcdhSpamMeSenseless@electrooptical. on Fri Jun 3 11:32:25 2022
    On Fri, 3 Jun 2022 12:32:44 -0400, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:
    If you take one of those triangular architects rulers, lay it on a
    table, put another ruler flat across the top, and rotate the
    triangular one, you can visualize full-wave rectifying a floating
    3-phase voltage source.



    Half-wave, surely. FW gives you six peaks per cycle.

    Cheers

    Phil Hobbs

    Six diodes select the most positive and most negative wires of the
    three. The output is analogous to the height of the ruler.

    Probably a black Toblerone bar would work better. Or the box it came
    in.

    In a FADEC, three of the diodes are mosfets, three with grounded
    source and common gate drive. When the rectified DC gets too high,
    they turn on the fets and that shorts the source.

    --

    If a man will begin with certainties, he shall end with doubts,
    but if he will be content to begin with doubts he shall end in certainties. Francis Bacon

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