Resonance Reduction for AC Drives With Small Capacitance in the DC Link

Lászlo Máthé, Lajos Török, Dong Wang, Dezso Sera

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

25 Citationer (Scopus)


Pulse-width modulated ac drives equipped with a small dc-link capacitor are becoming an attractive solution for electric drive applications with moderate requirements for shaft dynamic performance. However, when these drives are fed from a weak grid, a resonance between the line side impedance and the dc-link capacitor appears. Due to this resonance, the total harmonic distortion and the partially weighted harmonic distortion of the line currents are increased, which may raise compatibility problems with the ac line harmonic standards. This paper proposes a novel dc-link voltage compensation method, which can reduce the amplitude of the aforementioned oscillation, while the large dc-link voltage variation, caused by the rectification, can be eliminated from the motor current. The method has been experimentally validated and the results show excellent performance. © 2017 IEEE.
TidsskriftIEEE Transactions on Industry Applications
Udgave nummer4
Sider (fra-til)3814-3820
Antal sider7
StatusUdgivet - jul. 2017


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