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Thread: Searching for a motor..

              
   
   
  1. #1
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    Searching for a motor..

    Hello everyone,
    I am trying to find motors that fit a specific set of constraints (or as close as I can get).
    DC preferred but not required. 8-1/2 inches or less in diameter. 2-1/2 inches or less in length. 4kw-10kw rating. 200V continuous.

    Any help provided is much appreciated!
    Thank you, Redshirt.

  2. #2
    Empulse R #24 frodus's Avatar
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    200V continuous? Is that your battery pack voltage?

    There's a controller in between, usually, that uses PWM to control the motor, so you may have 200V on one side, but the motor itself may see varying levels of 200V on its input.

    What is this for? Pack size?

    2.5" length is going to be pretty hard to find, if you can even find it.

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    Quote Originally Posted by Redshirt View Post
    2-1/2 inches or less in length.
    1/2" for each bearing, and 1" for brushes, leaves 1/2" for the rotor..??
    "obstacles suck but challenges are fun"

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    200V motor voltage.

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    Empulse R #24 frodus's Avatar
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    Quote Originally Posted by Redshirt View Post
    200V motor voltage.
    I get that 200V is the max, but is it just going to be sitting there at max RPM the entire time?

    Usually there's a motor controller involved, to control speed and limit current.


    There's not likely a motor that small on the market for what you want to do. There's not really a reason for a 200V motor that small with that low power.

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    Quote Originally Posted by frodus View Post
    I get that 200V is the max
    Well, usually max is higher than continuous but for these purposes just drop a link for either/both.

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    Please post any links to motors you find, thank you.

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    Seņor Member podolefsky's Avatar
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    What is your application? There might be an alternative that would work if you can change some of your constraints or tell us more about what you're trying to do.

    Some hub motors are close to that size - Crystalyte H40 for example. But not 200V and not 4kW. The Crown is close to 4kW, but a little larger and still not 200V.

    http://www.crystalyte.com/
    - Noah Podolefsky -
    The GSX-E

  9. #9
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    Nice, thanks podolefsky!

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    Senior Member __Tango's Avatar
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    Can you use an outrunner? How about the revolt RV120-short (http://www.revolt.org.il/rv-120/rv-120pro-short/)?



    http://www.revolt.org.il/wp-content/...1/RV-120Sh.png

    It says max 96V, but you could contact them and maybe have it wound with a lower KV (rpm/volt) so it can handle the higher voltage.
    EVs: 2007 Zapino Scooter, Honda VF500 Conversion (electriceptor.wordpress.com), Red Nissan LEAF SL (Arrived!)

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