Title :
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
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;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4799-5205-2
DOI :
10.1109/CPEM.2014.6898541
