Title :
Spectral analysis of DC link ripple currents in three-phase AC/DC/AC PWM converters feeding AC machines
Author :
Park, Young Wook ; Lee, Dong-Choon ; Seok, Jul-Ki
Author_Institution :
Sch. of´´Electr. Eng. & Comput. Sci., Yeungnam Univ., Kyongbuk, South Korea
Abstract :
In this paper, DC link ripple currents for three-phase AC/DC/AC PWM converters feeding adjustable speed AC machine drives are analysed in a frequency domain. The expression of the harmonic currents is developed by using switching functions and exponential Fourier series expansion. The effect of the displacement angle between the switching periods of line-side converters and motor-side inverters on the DC link ripple currents is investigated. Also, the influence of asynchronization of PWM is observed. The result of analysis is compared with frequency spectrum which results from PSIM simulation
Keywords :
AC motor drives; AC-AC power convertors; AC-DC power convertors; DC-AC power convertors; Fourier analysis; PWM invertors; PWM power convertors; frequency-domain analysis; harmonic analysis; harmonic distortion; power conversion harmonics; rectifying circuits; spectral analysis; DC link ripple currents; PSIM simulation; PWM asynchronization; adjustable speed AC machine drives; computer simulation; displacement angle; exponential Fourier series expansion; frequency domain analysis; frequency spectrum; harmonic currents; line-side converters; motor-side inverters; spectral analysis; switching functions; switching periods; three-phase AC/DC/AC PWM power converters; Capacitors; Fourier series; Frequency; Power harmonic filters; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Space vector pulse width modulation; Spectral analysis; Switching converters;
Conference_Titel :
Industrial Electronics Society, 2001. IECON '01. The 27th Annual Conference of the IEEE
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-7108-9
DOI :
10.1109/IECON.2001.975926
