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Linear Hall Device Based Field Oriented Control Motor Drive System

  • US 20170272011A1
  • Filed: 06/07/2017
  • Published: 09/21/2017
  • Est. Priority Date: 12/04/2015
  • Status: Active Grant
First Claim
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1. A method for controlling an electric motor, the method comprising:

  • producing a first signal indicative of a strength of a first magnetic field component produced by a set of rotor magnets included within a rotor of the electric motor using a first linear Hall device;

    simultaneously producing a second signal indicative of a strength of second magnetic field component produced by the rotor magnets that is approximately orthogonal to the first magnetic field component using a second linear Hall device;

    calculating an angular position and angular velocity of the rotor based on the first signal and the second signal;

    producing a plurality of phase signals based on the calculated angular position and angular velocity; and

    controlling current in a plurality of field windings of the motor using the plurality of phase signals.

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