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Method and Arrangement for Reducing the Torque Ripple of a DC Motor

  • US 20170047872A1
  • Filed: 04/23/2015
  • Published: 02/16/2017
  • Est. Priority Date: 04/23/2014
  • Status: Active Grant
First Claim
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1. A method for reducing the torque ripple of a brushless DC motor with a stator, a rotor and a motor control unit by which the motor is controlled in a polyphase manner, with a data memory for storing correction data of the control current of the motor, which data is a function of the angle of rotation, in which correction data is impressed on the instantaneous values for controlling the motor, whereinin a first step for each position of the rotor phase, currents holding the rotor in this position are determined from which reference current data is derived which is stored in a table of the data memory together with the particular position data of the rotor which is determined by a position sensor, andin a second step during the running operation of the motor the position-dependent reference current data filed in the data memory is linked with the control current of the motor in such a manner that the original torque ripple of the motor is canceled or reduced.

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