Method for compensation of periodic shaking forces in an electrical rotating field machine
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United States of America Patent
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Sep 15, 1998
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N/A
app pub date -
May 12, 1997
filing date -
Dec 2, 1994
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Abstract
A method for the compensation of periodic shaking forces in an AC-machine having a special winding for the combined generation of a torque and a transverse force. The compensation takes place by a pre-control that acts on the desired force (at the input of the control method) or on the control current, and which is dependent on the flux angle, on the mechanical rotor angle, on the angular velocity of the flux, and on the mechanical angular velocity of the rotor. Additionally, linear and non-linear errors in the control of the transverse force vector such as arise from slot harmonics and winding harmonics and from the material saturation are compensated by a rotation stretching of the control current vector dependent on the flex vector.
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