An analytical approach to steady-state current control properties of power converters featuring discrete-time switching

Power converters with semiconductors switching only at predefined, equidistant instants - known as ldquodiscrete-time switchingrdquo, ldquosynchronized switchingrdquo or ldquoclocked commutationrdquo - show considerably different current control behavior compared to pulse-width modulated (PWM) conve...

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Main Authors: Ammann, U., Vargas, R., Rees, S., Serm, J., Roth-Stielow, J.
Format: Conference Proceeding
Language:English
Subjects:
Approximation methods
Control systems
Converters
Discrete-time switching
Modulation schemes
Neodymium
Predictive control
Pulse width modulation
Switches
Switching frequency
Synchronized switching
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creator Ammann, U.
Vargas, R.
Rees, S.
Serm, J.
Roth-Stielow, J.
description Power converters with semiconductors switching only at predefined, equidistant instants - known as ldquodiscrete-time switchingrdquo, ldquosynchronized switchingrdquo or ldquoclocked commutationrdquo - show considerably different current control behavior compared to pulse-width modulated (PWM) converters with linear current con trollers. This paper presents and explains some of the effects of discrete-time-switching on output current waveforms, especially when using a predictive switching state selection algorithm. Typical characteristics of generated switching state patterns are presented. A single-phase and a three-phase inverter controlled by a predictive discrete-time modulation strategy are considered. Analytical, experimental and simulation results show that average switching frequency and error current RMS are well defined, in spite of the inherent randomness of the control scheme.
doi_str_mv 10.1109/PESC.2008.4592322
format conference_proceeding
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This paper presents and explains some of the effects of discrete-time-switching on output current waveforms, especially when using a predictive switching state selection algorithm. Typical characteristics of generated switching state patterns are presented. A single-phase and a three-phase inverter controlled by a predictive discrete-time modulation strategy are considered. 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ispartof 2008 IEEE Power Electronics Specialists Conference, 2008, p.2535-2542
issn 0275-9306
2377-6617
language eng
recordid cdi_ieee_primary_4592322
source IEEE Electronic Library (IEL) Conference Proceedings
subjects Approximation methods
Control systems
Converters
Discrete-time switching
Modulation schemes
Neodymium
Predictive control
Pulse width modulation
Switches
Switching frequency
Synchronized switching
title An analytical approach to steady-state current control properties of power converters featuring discrete-time switching
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