Article
Computer Science, Information Systems
Guozheng Zhang, Yingjie Su, Zhanqing Zhou, Qiang Geng
Summary: In this paper, a DPWM strategy for NPC three-level inverter is proposed to reduce CMV and switching loss by modifying reference voltage, adjusting carriers, and implementing NPV control method. The feasibility and effectiveness of the proposed strategy are tested on a rapid control prototype platform based on RT-Lab.
Article
Automation & Control Systems
Andrei Blinov, Oleksandr Korkh, Andrii Chub, Dmitri Vinnikov, Dimosthenis Peftitss, Staffan Norrga, Ilya i Galkin
Summary: This article presents a high gain pure sine-wave inverter based on the full-bridge dc-ac high-frequency link cycloconverter topology for telecom or general-purpose applications. The improved quasi-resonant modulation method allows reduction of ringing and turn-off losses of the dc-side switches. This is achieved with minimal energy circulation and requires no multi-mode operation or extra auxiliary clamping circuits. The soft switching can be provided even if relatively large lossless snubber capacitors are connected across the input side transistors. Moreover, two of the switches at the ac side operate at the fundamental frequency, while the rest feature zero current turn-off.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Automation & Control Systems
Abraham Marquez, Vito Giuseppe Monopoli, Anatolii Tcai, Jose I. Leon, Giampaolo Buticchi, Sergio Vazquez, Marco Liserre, Leopoldo Garcia Franquelo
Summary: The cascaded H-bridge converter (CHB) is a suitable solution for various applications, but the discontinuous pulsewidth modulation (DPWM) used in this article to reduce switching losses leads to high harmonic distortion in the output voltage. The method proposed in this article cleverly groups the cells to mitigate basebands harmonic distortion and applies a variable-angle PS-PWM technique to reduce sidebands harmonics content, demonstrating good performance in experimental results.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Qiang Wang, Liang Li, Youzheng Wang
Summary: To improve efficiency, a novel efficient resonant pole inverter is proposed. The main switching devices achieve zero-voltage switching, ensuring reliable efficiency improvement. The maximum voltage and current are limited to avoid damage and the auxiliary circuits have constant conducting states, ensuring control reliability. Experimental results show soft-switching and an efficiency of 98.8% at rated power, indicating higher reliability compared to other inverters.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2023)
Article
Engineering, Electrical & Electronic
Salman Khan, Deshang Sha, Xiangshuai Jia, Sunbo Wang
Summary: A dual-transformer-based LLC resonant converter is proposed in this article, which regulates output voltage through fixed-frequency phase-shift pulsewidth modulation control scheme and designs magnetic components with switching frequency equal to the resonant frequency, achieving soft switching and high efficiency.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Jinyi Deng, Changsheng Hu, Keyan Shi, Min Chen, Dehong Xu
Summary: This article studies the soft-switching technique to improve the power density and performance of T-type three-level inverters. A novel zero-voltage switching (ZVS) PWM scheme is proposed for active clamping three-phase T-type inverters, which enables ZVS operation of all switches and reduces switching loss. The scheme is evolved from discontinuous PWM and modified for T-type inverters, allowing all switches to operate at a fixed frequency. To suppress current surge, the carriers used in the ZVS PWM scheme are phase shifted. Finally, the proposed ZVS PWM scheme is validated on a 10 kW/150 kHz SiC-based ZVS T-type inverter prototype.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Shahid Ali Khan, Dukju Ahn
Summary: This study proposes a tunable resonant tank and its control method for push-pull parallel-resonant inverter in wireless power transfer application. Real-time tuning maximizes output power and guarantees soft switching. This method achieves higher efficiency compared to conventional switch-controlled capacitor.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
P. M. Lingom, Joseph Song-Manguelle, Rodolfo Flesch, Tao Jin
Summary: This article proposes a novel SC-PWM scheme that simplifies the implementation of phase disposition PWM method, enhances control flexibility of multilevel converters, and develops an optimized switching strategy for CHB multilevel inverters.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Andres Mora, Roberto Cardenas, Ricardo P. Aguilera, Alejandro Angulo, Pablo Lezana, Dylan Dah-Chuan Lu
Summary: The proposed model predictive control (MPC) strategy based on optimal switching sequence concepts optimally achieves control of the average trajectory of active and reactive powers as well as dc-link capacitor voltages without using weighting factors. Experimental results demonstrate improved steady-state performance and fixed-switching frequency while maintaining fast dynamic responses.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Vladimir Strelkov, Andrey Dar'enkov, Elena Sosnina, Andrey Shalukho, Ivan Lipuzhin
Summary: Quasiresonant converters are efficient and stable with small dimensions, with the main advantages of a wide range of regulation and low output voltage ripple achieved by energy recuperation. The development of a mathematical model and analysis on electromagnetic processes in the AQRC demonstrates adjustability in output voltage and standard electromagnetic compatibility.
JOURNAL OF POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Sang-Won Lee, Minsung Kim, Young-Kyun Cho
Summary: This paper proposes a slam control method to improve the efficiency of a boost converter at light load condition while maintaining its voltage conversion ratio. By applying full duty-ratio to the switch during predetermined time, the light load efficiency is significantly increased and the output voltage is sufficiently boosted. In addition, quasi-resonant operation enables zero voltage switching, reducing further switching loss.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Vicente Esteve, Jose Jordan, Enrique J. Dede, Juan L. Bellido
Summary: This paper presents an enhanced Asymmetrical Modulation for Half-Bridge Series Resonant Inverters in Induction Heating Applications to improve system reliability. The method distributes the losses across the components using enhanced asymmetrical pulse width modulation (EAPWM), reducing the cyclic increase in junction temperature of the power devices. The presented design rules have been validated through the implementation of a 25 kW, 100 kHz inverter and testing on an induction heating test bench.
IET POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Djordje Stojic, Predrag Ninkovic, Milan Lukic, Tomasz Tarczewski
Summary: A modified multifrequency resonant current controller with a novel controller structure and parameter tuning procedure is proposed in this paper, along with an original anti-windup algorithm. The control structure enables simpler parameter tuning, faster settling times, and operation with a smaller margin between the controller cutoff frequency and maximum multifrequency controller harmonic frequency, as demonstrated through simulations and experimental tests.
INTERNATIONAL TRANSACTIONS ON ELECTRICAL ENERGY SYSTEMS
(2021)
Article
Engineering, Multidisciplinary
Mahima Gupta, Abhijeet Prem
Summary: This work proposes a PWM approach to modify the shape of the switching voltages to overcome the disadvantages of the fast transition times without any increase in switching losses. In fact, several of the switching transitions feature ZVS operation, resulting in reduced switching losses. The paper discusses the analytical details of the approach using a simple DC-DC boost-buck converter and extends it to a DC to three-phase AC converter using the principles of space vector modulation. The paper presents detailed simulation and comparative results in terms of voltage over-shoots over long cables, loss calculations and electromagnetic noise. Results from a laboratory-scale working prototype confirm the benefits of the proposed approach in terms of EMI and loss reduction.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Junjie Feng, Qiang Li, Fred C. Lee, Minfan Fu
Summary: The study focuses on omnidirectional wireless power transfer (WPT) systems and the use of LCCL-LC resonant converter topology. The research proposes a design methodology for achieving ZVS operation, and experimental results validate the success of ZVS operation in achieving a peak system efficiency of 82% at 5-W output power.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
