Re: [ATM] DC Motor for grinding machine question

[Richard <cnc@cncservo.co.uk>]

Hi Rod,

Wednesday, November 8, 2006, 12:49:47 AM, you wrote:

RB> No I had not considered that.  How would it work?

Couldn't be simpler. The inverter converts single phase to three
phase. It varies the voltage and frequency of the three phase to
control the motor speed accoring to the position of a
potentiometer or small DC control voltage input. 3 phase motors
are smaller, cheaper and more efficient than single phase
motors, and a lot quieter and more effecient than DC motors. No
brushes to wear out either.

-- 

Best regards,
  Richard in the UK

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