Signal-bandwidth evaluation for electric power calculation in PWM driven motors

Author

Lindenthaler, D.

Author_Institution

Inst. of Electr. Meas. & Meas. Signal Process., Graz Univ. of Technol., Graz, Austria

fYear

2014

fDate

24-29 Aug. 2014

Firstpage

626

Lastpage

627

Abstract

This investigation contributes to the power calculation of electric motors which are driven by pulse-width-modulation (PWM). In digital measurement systems, PWM signals have an undesired property: their spectra are broadly extended. The fulfilment of the sampling theorem requires the band limitation of the signals, which in turn influences the result of the power calculation. This paper presents a method for the calculation of the band limitation error for PWM signals and analyses the magnitude of this error in a numerical study.

Keywords

PWM invertors; digital instrumentation; electric motors; error analysis; measurement errors; power measurement; signal sampling; PWM electric motor; PWM signal; band limitation error calculation; digital measurement system; electric power calculation; pulse width modulation; sampling theorem; signal bandwidth evaluation; Bandwidth; Computational modeling; Electric motors; Power measurement; Power systems; Pulse width modulation; AC machines; energy efficiency; measurement uncertainty; motor drives; power measurement; pulse width modulation inverters;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on

Conference_Location

Rio de Janeiro

ISSN

0589-1485

Print_ISBN

978-1-4799-5205-2

Type

conf

DOI

10.1109/CPEM.2014.6898541

Filename

6898541