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IndustryArena Forum > CNC Electronics > Servo Motors / Drives > Speed control (not a servo amp) for BLDC motors?
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  1. #1
    Join Date
    May 2005
    Posts
    674

    Speed control (not a servo amp) for BLDC motors?

    I'm thinking about using a Parker brand frameless kit motor to power a mill spindle. I'm particularly drawn to the direct drive ability and low profile. They are BLDC motors.

    Is there a way to power and control these motors without a servo amp, but rather a simple and less expensive speed control? I'm not yet familiar with BLDC motors.

    These are the motors.
    http://www.parker.com/ead/cm2.asp?cmid=10547

    Some of them are supplied with an integrated commutation assembly.

    Any help would be appreciated.

  2. #2
    Join Date
    Dec 2003
    Posts
    24223
    You would requires some kind of drive that can accept a commutation signal. And use the correct commutation detectors, phased correctly, it looks like they supply these.
    Also the rotor is P.M. so some kind of BLDC drive is required.
    To use them in any other simpler fashion you would have to feed the three windings with three phases and make a squirel cage rotor/armature in place of the PM, but this may not be feasable.
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.

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