Filter with increased first harmonic response and reduced phase shift in a wide frequency band for encoderless drive applications

Filter with increased first harmonic response and reduced phase shift in a wide frequency band for encoderless drive applications

A method and apparatus for use with a controller that supplies voltages to an induction machine via supply lines, the voltages including a fundamental voltage component and an injected voltage component, the line voltages also including harmonic voltage components where the harmonic voltage componen...

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Hauptverfasser: Harbaugh, Mark Melvin, Royak, Semyon
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Sprache:eng
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creator Harbaugh, Mark Melvin
Royak, Semyon
description A method and apparatus for use with a controller that supplies voltages to an induction machine via supply lines, the voltages including a fundamental voltage component and an injected voltage component, the line voltages also including harmonic voltage components where the harmonic voltage components include at least a high frequency first harmonic component having a frequency substantially equal to the sum of the fundamental component frequency and the injected component frequencies, the method for identifying the high frequency first harmonic component and comprising the steps of sensing the line voltages, identifying a zero sequence voltage component of the line voltages, rectifying the zero sequence voltage component to generate a rectified signal and using the rectified signal to identify the high frequency first harmonic component.
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title Filter with increased first harmonic response and reduced phase shift in a wide frequency band for encoderless drive applications
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