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Motor control for stability and power supply protection

  • US 9,553,528 B2
  • Filed: 07/16/2015
  • Issued: 01/24/2017
  • Est. Priority Date: 07/02/2013
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a motor comprising windings;

    a switch bridge comprising a plurality of switches configured to couple a power source to the windings;

    a motor controller configured to control the plurality of switches and a duty cycle, wherein a number of the plurality of switches in the switch bridge is closed during the duty cycle to provide a current between the power source and the windings in response to a commanded current;

    an undesired condition identifier configured to identify an undesired condition in the apparatus when the motor is providing power to the power source, wherein the undesired condition is defined with respect to a characteristic of the power source, and wherein the undesired condition is identified when the commanded current is greater than a current limit for the power source; and

    an undesired condition reducer configured to reduce the undesired condition in response to identifying the undesired condition in the apparatus by the undesired condition identifier, wherein the undesired condition reducer is configured to set the commanded current based on the current limit for the power source when the undesired condition is identified when the commanded current is greater than the current limit for the power source.

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