METHOD OF OPERATING AN ELECTRIC MOTOR
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United States of America Patent
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app pub date -
Nov 18, 2016
filing date -
Nov 21, 2015
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Abandoned
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Abstract
In a method of operating an electric motor, a pulse-width-modulated basic signal having a pulse width modulation frequency is generated for an electric variable of the electric motor. A control unit generates for the electric variable a sinusoidal additional signal at a sinusoidal frequency in an acoustically audible frequency range, and adds the basic signal and the additional signal to form an acoustic signal for the electric variable. The electric variable with the acoustic signal can be made available to the electric motor.
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