Real time digital feedback control of three phase PWM inverter with quick transient response suitable for uninterruptible power supply

Author

Kawamura, Atsuo ; Ishihara, Kiyoshi

Author_Institution

Dept. of Electr. & Comput. Eng., Yokohama Nat. Univ., Japan

fYear

1988

fDate

2-7 Oct. 1988

Firstpage

728

Abstract

A digital control technique is proposed to obtain sinusoidal three-phase PWM (pulsewidth-modulated) inverter output. Sensing two line-to-line voltages the required pulse patterns for deadbeat response are computed in real time, based on the predicted voltages by an observer at 18 kHz sampling frequency. This closed-loop voltage control inherently results in a very low total harmonic distortion and a very quick transient response with less filter capacity. The authors describe the modeling technique, theoretical analysis, simulations, and experimental results.<>

Keywords

closed loop systems; digital control; feedback; invertors; pulse width modulation; transient response; voltage control; closed-loop voltage control; deadbeat response; digital feedback control; low total harmonic distortion; modeling technique; observer; quick transient response; real-time control; three phase PWM inverter; uninterruptible power supply; Digital control; Feedback control; Frequency; Pulse inverters; Pulse width modulation inverters; Sampling methods; Space vector pulse width modulation; Total harmonic distortion; Transient response; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1988., Conference Record of the 1988 IEEE

Conference_Location

Pittsburgh, PA, USA

Type

conf

DOI

10.1109/IAS.1988.25143

Filename

25143