Digital Control of Power Electronics

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".

Deadline for manuscript submissions: closed (20 May 2024) | Viewed by 9546

Special Issue Editors


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Guest Editor
CISE - Electromechatronic Systems Research Centre, University of Beira Interior, Calçada Fonte do Lameiro, P-6201-001 Covilhã, Portugal
Interests: digital control of power electronic converters; fault diagnosis and fault-tolerant control of ac motor drives and wind turbine systems
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Guest Editor
CISE—Electromechatronic Systems Research Centre, University of Beira Interior, Calçada Fonte do Lameiro, P - 6201-001 Covilhã, Portugal
Interests: diagnosis and fault tolerance of electrical machines, power electronics and drives
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The state of the art indicates that the behavior and performance of power electronics can be significantly improved by introducing more advanced digital control technologies. In classical digital control, PI and hysteresis controllers have been used due to their simplicity and low parameters dependence. However, these controllers show limitations in terms of dynamic response or control performance. In recent years, model predictive control has been a powerful advanced digital control technology due to its superior control performance and excellent dynamic response. Nevertheless, this control technique suffers from excessive tuning and computational requirements, as well as high model/parameters dependence.

At present, great effort is being focused on development in the digital control of power electronics, which presents critical features such as high control performance and fast dynamic response, robustness against noise/variation of parameters/faults etc., low tuning/computational requirements, simple implementation and model/parameters independence.

The aim of this Special Issue is to provide an opportunity for scientists, researchers, and practicing engineers to share and disseminate their latest discoveries and results in the aforementioned fields, indicating the future trends for the digital control of power electronics.

Topics include, but are not limited to, the following research areas:

  • New digital control techniques for power electronics;
  • Stability and robustness of digital control;
  • Low-complexity digital algorithms;
  • Model-free digital control approaches;
  • Implementation issues of digital algorithms;
  • Artificial intelligence and data-driven approaches in digital control.

Dr. Imed Jlassi
Prof. Dr. Antonio J. Marques Cardoso
Guest Editors

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Published Papers (6 papers)

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Research

26 pages, 14822 KiB  
Article
Response Time Reduction of DC–DC Converter in Voltage Mode with Application of GaN Transistors and Digital Control
by Kaspars Kroičs, Kristiāns Gaspersons and Ahmad Elkhateb
Electronics 2024, 13(5), 901; https://doi.org/10.3390/electronics13050901 - 27 Feb 2024
Viewed by 793
Abstract
This paper discusses the potential to decrease the response time of a DC–DC converter through the substitution of Si transistors with GaN transistors and the implementation of digital control techniques. This paper introduces an improved methodology for designing digital voltage controllers by analyzing [...] Read more.
This paper discusses the potential to decrease the response time of a DC–DC converter through the substitution of Si transistors with GaN transistors and the implementation of digital control techniques. This paper introduces an improved methodology for designing digital voltage controllers by analyzing discretization delays and subsequently implementing a modified analog controller design method. The theoretical analysis was verified using an experimental prototype of a 100 W 48 V to 12 V GaN-based DC–DC converter. A digital controller that allows a 50 kHz bandwidth to be achieved based on an STM32G4 microcontroller was developed, and the design of the controller is discussed in detail. The converter was operated with a 500 kHz switching frequency using a 6 µH inductor and a 20 µF ceramic capacitor output filter. Although the digital control introduced a 1.2 µs delay, a converter response time equal to 40 µs was achieved. Simulation models were created and their results were verified via comparisons with experimental results obtained with an AP310 frequency response analyzer. Full article
(This article belongs to the Special Issue Digital Control of Power Electronics)
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15 pages, 6025 KiB  
Article
Hybrid Control-Based Closed-Loop Soft Start-Up Method for LLC Resonant Converters
by Tian Gao, Youzhi Wang, Yongming Gao, Gang Sun, Haoyue Wang and Jing Hou
Electronics 2023, 12(22), 4563; https://doi.org/10.3390/electronics12224563 - 7 Nov 2023
Viewed by 1041
Abstract
LLC resonant converters are prone to generating a large inrush current during the start-up process, which will cause damage to the resonant elements and threaten the safe operation of the circuit. In this study, we investigate the soft-start method to suppress the inrush [...] Read more.
LLC resonant converters are prone to generating a large inrush current during the start-up process, which will cause damage to the resonant elements and threaten the safe operation of the circuit. In this study, we investigate the soft-start method to suppress the inrush current of an LLC resonant converter. Based on the traditional frequency-decreasing method, we integrate PWM control to broaden the output voltage gain range during the start-up. Additionally, to ensure the smooth establishment of the output voltage, the controller performs the closed-loop control of the duty cycle and frequency in sequence based on the rate of output voltage rise. A prototype experiment based on STM32F334C8T6 is established to experimentally validate the presented soft start-up method. The experiment results indicate that the soft start-up method improves the start-up performance, reduces the maximum inrush current by 47.5% compared with that of the frequency-decreasing method, and builds up the output voltage quickly. The start-up process is smooth, which improves the reliability of the LLC resonant converter. Full article
(This article belongs to the Special Issue Digital Control of Power Electronics)
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16 pages, 18338 KiB  
Article
Low-Cost Real-Time Control Platform with Embedded Isolated Electrical Sensors for Power Electronics
by Luis Ramon Merchan-Villalba, Jose Merced Lozano-Garcia, Francisco Gonzalez-Longatt, Juan Manuel Ramirez-Arredondo, Alejandro Pizano-Martinez and Juan Gabriel Avina-Cervantes
Electronics 2023, 12(15), 3320; https://doi.org/10.3390/electronics12153320 - 3 Aug 2023
Cited by 1 | Viewed by 1149
Abstract
This paper presents a versatile, low-cost real-time control platform with embedded isolated inputs and outputs for direct usage in electrical applications. The inputs correspond to voltage and current measurements, while the outputs are digital signals with isolated power supply. The validation for the [...] Read more.
This paper presents a versatile, low-cost real-time control platform with embedded isolated inputs and outputs for direct usage in electrical applications. The inputs correspond to voltage and current measurements, while the outputs are digital signals with isolated power supply. The validation for the platform considers the implementation of the power electronics topologies where the control algorithms are implemented in Simulink. The topologies are the interleaved three-phase buck converter, push–pull converter, H-bridge, and thyristor-based AC load controller. The control for them involves voltage feedback, current feedback, linear control algorithms, and the implementation of a discrete PLL algorithm for the last topology. Hence, the platform demonstrates the effectiveness of performing real-time control for some power electronics topologies. Full article
(This article belongs to the Special Issue Digital Control of Power Electronics)
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15 pages, 4484 KiB  
Article
Property Preservation of Object-Oriented Petri Reduction Net Based Representation for Embedded Systems
by Chuanliang Xia, Yan Sun, Bin Shen and Maibo Guo
Electronics 2023, 12(8), 1955; https://doi.org/10.3390/electronics12081955 - 21 Apr 2023
Viewed by 1229
Abstract
Embedded systems are widely used in automotive electronics, smart home, smart medical, aerospace and other fields. Aiming at the problem of formal modeling and verification analysis of embedded systems, a solution is proposed using extended Petri net reduction operations. Petri net based representation [...] Read more.
Embedded systems are widely used in automotive electronics, smart home, smart medical, aerospace and other fields. Aiming at the problem of formal modeling and verification analysis of embedded systems, a solution is proposed using extended Petri net reduction operations. Petri net based representation for embedded system (PRES+) and the object-oriented technology are combined to obtain the object-oriented PRES+ (OOPRES+). Two kinds of subnet reduction rules of OOPRES+ are presented. The preservation of boundedness and liveness of the reduction net system has been investigated to alleviate the problem of state space explosion of OOPRES+. The modeling and analysis of the embedded control system of a smart restaurant is used as an example to verify the effectiveness of the subnet reduction rules. Results obtained can provide an effective way to examine the reduction property of Petri net systems, and present a powerful means to model and verify the large-scale complex embedded systems. Full article
(This article belongs to the Special Issue Digital Control of Power Electronics)
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14 pages, 2178 KiB  
Article
Synchronization and Control of a Single-Phase Grid-Tied Inverter under Harmonic Distortion
by Kamyar Seifi and Mehrdad Moallem
Electronics 2023, 12(4), 860; https://doi.org/10.3390/electronics12040860 - 8 Feb 2023
Cited by 1 | Viewed by 2335
Abstract
Grid-connected inverters in renewable energy systems must provide high-quality power to the grid according to regulatory standards such as the IEEE 1547. To provide high-quality current control when the inverter is connected to a distorted grid, the frequency and phase information of the [...] Read more.
Grid-connected inverters in renewable energy systems must provide high-quality power to the grid according to regulatory standards such as the IEEE 1547. To provide high-quality current control when the inverter is connected to a distorted grid, the frequency and phase information of the fundamental harmonic of the grid should be accurately obtained. This paper examines controller design for a single-phase inverter when there is distortion in the grid voltage. The control structure is designed to enhance the quality of the injected current into the grid. To this end, a frequency-locked loop (FLL) sinusoidal tracking controller which is able to reject the grid harmonics is proposed. Thus, the contribution of this paper is a new frequency-locked loop structure with adaptive notch filters that can provide accurate estimation of grid phase and frequency and improve the performance of single-phase inverters working under harmonic distortion. We also present an explanation of how the proposed adaptive nonlinear scheme can be discretized for digital implementation on a microcontroller. Experimental and simulation results are presented to demonstrate the performance of the proposed controller in eliminating distortion and enhancing the quality of the produced power. Full article
(This article belongs to the Special Issue Digital Control of Power Electronics)
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16 pages, 3131 KiB  
Article
Model Free Predictive Current Control Based on a Grey Wolf Optimizer for Synchronous Reluctance Motors
by Abdelkader Mahmoudi, Imed Jlassi, Antonio J. Marques Cardoso and Khaled Yahia
Electronics 2022, 11(24), 4166; https://doi.org/10.3390/electronics11244166 - 13 Dec 2022
Cited by 4 | Viewed by 1668
Abstract
A Model-based predictive current control (MBPCC) has recently become a powerful advanced control technology in industrial drives. However, MBPCC relies on the knowledge of the system model and parameters, being, therefore, very sensitive to parameters errors. In the case of the synchronous reluctance [...] Read more.
A Model-based predictive current control (MBPCC) has recently become a powerful advanced control technology in industrial drives. However, MBPCC relies on the knowledge of the system model and parameters, being, therefore, very sensitive to parameters errors. In the case of the synchronous reluctance motor (SynRM), where the parameters vary due to its ferromagnetic structure and nonlinear magnetic properties, MBPCC performance would suffer significantly. Accordingly, in this paper, a Grey Wolf Optimizer based model-free predictive current control (GW-MFPCC) of SynRM is proposed, to skip all the effects of the model dependency and parameters uncertainty. The proposed method predicts the stator current through tracking the minimum cost function using the grey wolf optimizer. The proposed GW-MFPCC scheme is compared to MBPCC, and its effectiveness is evaluated and confirmed by experimental results. Full article
(This article belongs to the Special Issue Digital Control of Power Electronics)
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