Sampling methods for discontinuous voltage and current signals and their influence on bandwidth of control loops of electrical drives

Author

Blasko, Vladimir ; Kaura, Vikram ; Niewiadomski, Walter

Author_Institution

Allen Bradley, Mequon, WI, USA

Volume

1

fYear

1997

fDate

23-27 Feb 1997

Firstpage

520

Abstract

Two new methods for sampling the discontinuous voltage and current signals in a PWM invertor-fed AC motor drive are proposed. The methods are based on sampling the instantaneous values and locally averaged values (over one carrier period) of signals. The analytical expressions for adjustment of digital current regulators and achievable bandwidths with the different sampling methods are derived. The results are experimentally verified

Keywords

AC motor drives; DC-AC power convertors; PWM invertors; control system synthesis; electric current control; machine control; machine testing; voltage control; AC motor drive; PWM invertor; achievable bandwidths; carrier period; control design; control loops; control performance; current regulator; digital current regulators; discontinuous current signal sampling; discontinuous voltage signal sampling; instantaneous values; locally averaged values; AC motors; Bandwidth; Counting circuits; Drives; Microprocessors; Pulse width modulation; Sampling methods; Space vector pulse width modulation; Synchronous motors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 1997. APEC '97 Conference Proceedings 1997., Twelfth Annual

Conference_Location

Atlanta, GA

Print_ISBN

0-7803-3704-2

Type

conf

DOI

10.1109/APEC.1997.581507

Filename

581507