ADJUSTMENT METHOD FOR SPEED-CONTROLLED ELECTRONIC DRIVE AND APPARATUS FOR IMPLEMENTING THE SAME
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United States of America Patent
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Issued Date -
May 5, 2016
app pub date -
Oct 28, 2015
filing date -
Nov 5, 2014
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Abstract
The present disclosure describes an adjustment method and apparatus for implementing the method for a speed-controlled electric drive of an electric vehicle. In the method, a rotational speed of the electric drive is controlled by a frequency converter on the basis of a constrained speed reference. The method comprises determining the rotational speed, receiving an unconstrained speed reference, calculating the constrained speed reference on the basis of the unconstrained speed reference, wherein a rate of change of the constrained speed reference is limited to a predefined range, and if a value of the determined rotational speed is between the values of the constrained speed reference and the unconstrained speed reference, setting the value of the constrained speed reference the same as the value of the determined rotational speed.
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