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Processes
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State of the Art of Sliding-Mode Controller for Energy Efficiency...
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State of the Art of Sliding-Mode Controller for Energy Efficiency Improvement

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Energy Systems".

Deadline for manuscript submissions: closed (1 August 2022) | Viewed by 4294

Special Issue Editors

Dr. Hsin-Jang Shieh

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Guest Editor
Department of Electrical Engineering, National Dong Hwa University, Hualien 97401, Taiwan
Interests: power converters; motor drives; control systems technology
Special Issues, Collections and Topics in MDPI journals
Dr. Ying-Zuo Chen

E-Mail
Guest Editor
Department of Electrical Engineering, National Dong Hwa University, Hualien 97401, Taiwan
Interests: AC motor drives and generators; power converters; photovoltaic power systems; micropositioning systems; sliding-mode control and applications

Special Issue Information

Dear Colleagues,

With the demand for energy-efficient power systems growing in many applications, control techniques to improve transient performance or energy efficiency have acquired a particularly important role. Among the available control techniques for control systems, the sliding-mode control (or variable structure control) approach has received much attention in various applications due to its robustness againt disturbances and uncertainties and its superior transient response properties. As a result, numerous studies have been carried out on the applications of (higher-order or advanced) sliding-mode control techniques to improve energy efficiency or transient performance in motor drives, energy storage and supply systems, and power generators and converters.

The aim of this Special Issue on “State of the Art of Sliding-Mode Controllers for Energy Efficiency Improvement” is to present up-to-date research on energy-efficiency-improved power and/or energy conversion systems by controllers, especially advanced sliding-mode controllers. Topics include but are not limited to the following:

  • Energy conversion and systems
  • Power electronics and converters
  • Renewable power devices and systems
  • Efficiency and performance improvements
  • Sliding-mode controllers
  • System modeling and control

Prof. Dr. Hsin-Jang Shieh
Dr. Ying-Zuo Chen
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • energy conversion and systems
  • power electronics and converters
  • renewable power devices and systems
  • efficiency and performance improvements
  • sliding-mode controllers
  • system modeling and control

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Published Papers (2 papers)

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Research

11 pages, 3477 KiB  
Article
Optimization of a Multilevel Inverter Design Used for Photovoltaic Systems under Variable Switching Controllers
by Ayoob Alateeq, Yasser Almalaq and Abdulaziz Alateeq
Processes 2022, 10(6), 1159; https://doi.org/10.3390/pr10061159 - 9 Jun 2022
Cited by 6 | Viewed by 1789
Abstract
Among multilevel inverters (MLIs), two-level inverters are the most common. However, this inverter type cannot maintain total harmonic distortion (THD) due to its limited number of levels. Reductions in THD are inversely proportional to the number of levels where increased output occurs in [...] Read more.
Among multilevel inverters (MLIs), two-level inverters are the most common. However, this inverter type cannot maintain total harmonic distortion (THD) due to its limited number of levels. Reductions in THD are inversely proportional to the number of levels where increased output occurs in diverse ways, and the use of fewer components with low harmonic distortion is necessary for such reductions. This work proposes a seven-level (7L) MLI design with a small number of components and low harmonic distortion. The proposed MLI is combined with switched capacitor (SC) cells to promote output levels and at the same time to boost the input voltage. The connections between the capacitor and the source are based on the series to parallel topology, where the charging and discharging of the SC cells are caused by fluctuations in their connection. The output of the SC cell is combined with an H-bridge inverter controlled by a proposed PWM controller. The simulation result of the SC 7L inverter was completed using LTspice software. A comparison of the proposed topology with that of other current MLI led to better validation results. The proposed design shows a reduction in the THD with fewer components. The cost and size of the proposed inverter is minimal due to the smaller number of components. Ohmic load and inductive ohmic load were used as loads for the system. Full article
(This article belongs to the Special Issue State of the Art of Sliding-Mode Controller for Energy Efficiency Improvement)
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16 pages, 5588 KiB  
Article
The Design and Magnetic Field Analysis of a Double Rotor Permanent Magnet Braking Device
by Jinhua Tang and Yanyan Zuo
Processes 2022, 10(2), 346; https://doi.org/10.3390/pr10020346 - 11 Feb 2022
Cited by 1 | Viewed by 1746
Abstract
During long-term continuous braking, high-intensity braking, or frequent braking, the temperature of the brake disc or brake drum will increase significantly, resulting in a decrease in the friction coefficient, the aggravation of the wear degree, and the dangerous heat recession of partial or [...] Read more.
During long-term continuous braking, high-intensity braking, or frequent braking, the temperature of the brake disc or brake drum will increase significantly, resulting in a decrease in the friction coefficient, the aggravation of the wear degree, and the dangerous heat recession of partial or even total loss of braking efficiency. This paper focuses on an innovative double rotor permanent magnet braking device, which is located on the inner side of the wheel hub, to improve the heat decay resistance of the friction braking device. The structure and principle of the double rotor permanent magnet braking device were given, and its main structural parameters were designed, calculated, and optimized. The geometric model and finite element model of the double rotor permanent magnet braking device were established. The static and transient magnetic field analysis and the braking torque characteristic analysis of the double rotor permanent magnet braking device were carried out by using Maxwell electromagnetic analysis software. The results show that the magnetic flux density in the working area of the double rotor permanent magnet braking device increases with the increase in rotation speed, the braking torque changes with the change of rotation speed, and the maximum braking torque occurs in the low-speed area, which is consistent with the theoretical calculation results. This provides a theoretical basis for the follow-up prototype test of the double rotor permanent magnet braking device. Full article
(This article belongs to the Special Issue State of the Art of Sliding-Mode Controller for Energy Efficiency Improvement)
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