Title :
Sampling of discontinuous voltage and current signals in electrical drives: a system approach
Author :
Blasko, Vladimir ; Kaura, Vikram ; Niewiadomski, Walter
Author_Institution :
Standard Drives Div., Rockwell Autom.-Allen Bradley Company, Mequon, WI, USA
Abstract :
Various methods for sampling of voltage and current signals in electrical drives are analyzed and compared, two new methods for sampling the discontinuous voltage and current signals in a pulsewidth modulation drive are proposed. The methods are based on sampling the instantaneous values and locally averaged values (over one carrier period) of signals. Analytical expressions for adjustment of digital current regulators and achievable bandwidths with the various sampling methods are derived. The results are experimentally verified
Keywords :
electric current measurement; electric drives; machine testing; machine theory; signal sampling; voltage measurement; achievable bandwidths; carrier period; digital current regulators; discontinuous current signal sampling; discontinuous voltage signal sampling; electrical drives; instantaneous values; locally averaged values; pulsewidth modulation drive; system approach; AC motors; Analog computers; Bandwidth; Drives; Industry Applications Society; Pulse modulation; Pulse width modulation; Sampling methods; Space vector pulse width modulation; Voltage;
Journal_Title :
Industry Applications, IEEE Transactions on
