Asynchronous motor and method for operating an asynchronous motor
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United States of America Patent
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Dec 20, 2016
Grant Date -
May 21, 2015
app pub date -
Nov 18, 2014
filing date -
Nov 18, 2013
priority date (Note) -
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Abstract
In a method for operating an asynchronous motor including a main winding and an auxiliary winding, a start capacitor is connected in series with the auxiliary winding before the asynchronous motor is started up and is disconnected at a point in time, which is to be determined, after the asynchronous motor is started up. The voltage of the auxiliary winding is measured and at least one mathematical model is used, which models the voltage amplitude of the voltage of the auxiliary winding in relation to time and includes at least one parameter of the dynamic process of the motor starting procedure, which is determined on the basis of the mathematical model and the course of the amplitude or the effective value of the measured voltage of the auxiliary winding, and the point in time for disconnecting the start capacitor is determined by means of the determined parameter.
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