Title :
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
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;
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
DOI :
10.1109/APEC.1997.581507
