EMC of Wideband Power Sources

Dariusz Brodecki, Ernest Stano, Mateusz Andrychowicz and Piotr Kaczmarek
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Dariusz Brodecki: Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-924 Lodz, Poland
Ernest Stano: Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-924 Lodz, Poland
Mateusz Andrychowicz: Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-924 Lodz, Poland
Piotr Kaczmarek: Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-924 Lodz, Poland

Energies, 2021, vol. 14, issue 5, 1-14

Abstract: In this paper the results of the EMC tests of the wideband power sources: the PWM-based power source and audio power amplifier are discussed. They are intended to be used to supply the measuring system developed for evaluation of the wideband transformation accuracy of instrument transformers. Therefore, it is required to detect possible interferences that may be caused by the power supply to its operation and that may cause a decrease in its accuracy. The tests concern the conducted emission in the frequencies range from 150 kHz to 30 MHz and the radiated emission in the frequencies range from 30 MHz to 1 GHz. Moreover, the level of conducted disturbances in frequencies range from 100 Hz to 5 kHz generated into the supplying current is measured and the immunity of both wideband power sources to low frequency conductive disturbances in the supplying voltage and current is tested. Then, the voltage gain error and phase shift of the output voltage are measured. The EMC tests of both power sources show lack of compliance with the requirement of the standard IEC 61326-1. However, in system application of the audio power amplifier is possible if required increased immunity to conducted emission of the measuring system is ensured.

Keywords: wideband power sources; gain error; PWM inverter; power amplifier; generation of distorted current; EMC; higher harmonics; conducted emission; radiated emission (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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