NDLI: Analysis and characterization of DC Bus ripple current of two-level inverters using the equivalent centered harmonic approach

Content Provider	IEEE Xplore Digital Library
Author	Ayhan, U. Hava, A.M.
Copyright Year	2011
Description	Author affiliation: Middle East Technical University, Dept. of Electrical and Electronics Engineering, Ankara, 06800, Turkey (Ayhan, U.; Hava, A.M.)
Abstract	The dc bus PWM ripple current of three-phase two-level voltage source inverters is a function of the PWM method, the load current magnitude, power factor angle, and the modulation index. Thus, the ripple current characteristics are highly involved and difficult to understand. Using the double Fourier integral approach, this paper investigates the ripple current characteristics thoroughly for a wide range of operating conditions and PWM methods. Then, the equivalent harmonic approach is used to lump the ripple current carrier frequency component and its sidebands to the center as a single frequency equivalent (and the same done for the multiples of the carrier). With this approach the capacitor ESR based losses are predicted easily and the dominant frequency range can be understood better. Thus, a better inverter and dc bus capacitor design can be achieved. Analysis is supported by means of simulations and a high degree of correlation is obtained. The paper additionally evaluates and suggests PWM methods for various inverter applications with the dc bus ripple performance being the main constraint. Thus, it is beneficial for the design engineer.
Starting Page	3830
Ending Page	3837
File Size	876450
Page Count	8
File Format	PDF
ISBN	9781457705427
e-ISBN	9781457705410
DOI	10.1109/ECCE.2011.6064289
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Space vector pulse width modulation Capacitors Harmonic analysis Amplitude modulation Inverters
Content Type	Text
Resource Type	Article

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