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ESC again- Rating? — Parallax Forums

ESC again- Rating?

ArchiverArchiver Posts: 46,084
edited 2001-06-24 13:34 in General Discussion
Hobby/RC ESC's are typically rated for so many cells and so many
motor turns. The more generous suppliers actually tell us volts and
amps.
Question: Most of these ESC's are "rated" at 7.2 or 8.4 volts. Any
reason to think they'll fry at 12 to 14v? Anyone have experience?

patmat

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-06-19 20:08
    At 06:58 PM 6/19/01 +0000, you wrote:
    >Hobby/RC ESC's are typically rated for so many cells and so many
    >motor turns. The more generous suppliers actually tell us volts and
    >amps.
    >Question: Most of these ESC's are "rated" at 7.2 or 8.4 volts. Any
    >reason to think they'll fry at 12 to 14v? Anyone have experience?
    >
    >patmat

    My experience:
    It's real neat to see them SMOKE.... but they'll only do it once!!

    [noparse]:o[/noparse])
    Beau Schwabe IC Mask Designer
    National Semiconductor Wired Communications Division
    500 Pinnacle Court, Suite 525 Mail Stop GA1 Norcross, GA 30071
  • ArchiverArchiver Posts: 46,084
    edited 2001-06-19 21:23
    I have controllers that will run up to 14 cells and can be found that use up to
    32 cells. most manufactures spec the
    number of cells the ESC's will handle (1.2 volts per cell)

    patmat2350@a... wrote:

    > Hobby/RC ESC's are typically rated for so many cells and so many
    > motor turns. The more generous suppliers actually tell us volts and
    > amps.
    > Question: Most of these ESC's are "rated" at 7.2 or 8.4 volts. Any
    > reason to think they'll fry at 12 to 14v? Anyone have experience?
    >
    > patmat
    >
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  • ArchiverArchiver Posts: 46,084
    edited 2001-06-19 21:50
    Is this that "do once" mode I've seen on some H-bridge designs?

    Personally, I would build my own H-bridges or buy a robot-specific control
    module like the MotorMind B or the kits Mondo Tronics sells.
    Original Message

    > >Hobby/RC ESC's are typically rated for so many cells and so many
    > >motor turns. The more generous suppliers actually tell us volts and
    > >amps.
    > >Question: Most of these ESC's are "rated" at 7.2 or 8.4 volts. Any
    > >reason to think they'll fry at 12 to 14v? Anyone have experience?

    > It's real neat to see them SMOKE.... but they'll only do it once!!
  • ArchiverArchiver Posts: 46,084
    edited 2001-06-24 13:34
    The extra volatge would probably not be a problem, but if you run the same
    amount of current thru you will probably excedd the power handling og the
    FETs.
    > Hobby/RC ESC's are typically rated for so many cells and so many
    > motor turns. The more generous suppliers actually tell us volts and
    > amps.
    > Question: Most of these ESC's are "rated" at 7.2 or 8.4 volts. Any
    > reason to think they'll fry at 12 to 14v? Anyone have experience?
    >
    > patmat
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