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Digital motor control system

  • US 5,321,343 A
  • Filed: 02/16/1993
  • Issued: 06/14/1994
  • Est. Priority Date: 02/16/1993
  • Status: Expired due to Fees
First Claim
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1. A control system for controlling energization of a dc motor with ac power, said control system comprising:

  • converter means having a plurality of switches sequentially gating portions of half cycles of said ac power to said dc motor in response to sequentially generated firing signals to provide dc power to said motor; and

    digital processor means comprising means digitally generating plural parallel control loops each controlling a selected motor parameter in response to an associated parameter signal, each said control loop including digital means applying selected control action to the associated parameter signal to generate an associated intermediate control signal, a common digital integrator means, means selecting one of said associated intermediate control signals for application to said common digital integrator means to generate a resultant control signal having an integral of said selected control action which is applied to the selected one of said associated intermediate control signals, and means generating said firing signals in response to said resultant control signal.

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