Asymmetric Carrier Random PWM

Laszlo Mathe, Florin Lungeanu, Peter Omand Rasmussen, John Kim Pedersen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

8 Citations (Scopus)


This paper presents a new fixed carrier frequency random PWM method, where a new type of carrier wave is proposed for modulation. Based on the measurements, it is shown that the spread effect of the discrete components from the motor current spectra is very effective independent of the modulation index. The flat motor current spectrum generates an acoustical noise close to the white noise, which may improve the acoustical performance of the drive. The new carrier wave is easy to implement digitally, without employing any external circuits. The modulation method can be used in open, as well as in closed loop motor control applications.
Original languageEnglish
Title of host publicationProceedings of the IEEE International Symposium on Industrial Electronics, ISIE 2010
Number of pages6
PublisherIEEE Press
Publication dateJul 2010
ISBN (Print)978-1-4244-6390-9
Publication statusPublished - Jul 2010
Event2010 IEEE International Symposium on Industrial Electronics, ISIE 2010 - Bari, Italy
Duration: 4 Jul 20107 Jul 2010


Conference2010 IEEE International Symposium on Industrial Electronics, ISIE 2010
SponsorThe Institute of Electrical and Electronics Engineers (IEEE), IEEE Industrial Electronics Society (IES), IEEE Control Systems Society (CSS), Society of Instrument and Control Engineers (SICE-Japan), Polytechnic University of Bari

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