Article
Engineering, Electrical & Electronic
Mohsen Packnezhad, Hosein Farzanehfard
Summary: This article presents a bidirectional buck/boost converter with coupled inductors technique to increase voltage conversion ratio and improve efficiency. By utilizing an active clamp circuit and soft-switching conditions, the converter effectively controls the main switches to enhance performance. The converter provides soft-switching conditions for all switches, solving issues related to current switching and reverse recovery.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Subhendu Bikash Santra, Debashis Chatterjee, Yam P. Siwakoti
Summary: This article proposes a new method to reduce input ripple current and increase voltage conversion ratio in BDC at the low voltage side using parallel coupled inductor and capacitor circuit, eliminating the necessity of interleaved structure. Additionally, zero voltage switching turn on operation of all active switches is achievable utilizing the synchronous rectification principle.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Ramin Rahimzadeh Khorasani, Hamed Moradmand Jazi, Nilanjan Ray Chaudhuri, Arash Khoshkbar-Sadigh, Mahdi Shaneh, Ehsan Adib, Patrick Wheeler
Summary: This article proposes a novel soft switched interleaved boost structure with a simple auxiliary circuit suitable for stand-alone loads or ac grid applications. The structure has high voltage conversion ratio and the capability to add extra switched capacitor cells for very high voltage gain. The converter achieves soft-switching condition with the help of a new auxiliary circuit, resulting in high efficiency at both full-load and light loads. The converter also benefits from the utilization of the leakage inductance, common ground connection, and low conduction losses.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Mohsen Packnezhad, Hosein Farzanehfard
Summary: This article presents a soft-switching buck-boost converter with high step-up/down conversion ratio, utilizing coupled inductors and a simple auxiliary circuit. The design eliminates the reverse recovery problem of switches body diodes, improving the converter efficiency.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Bin Xu, Zhaotian Yan, Wei Zhou, Lu Zhang, Huazhong Yang, Yongpan Liu, Lizhou Liu
Summary: This paper proposes a bidirectional integrated equalizer based on the Sepic-Zeta converter for the hybrid energy storage system (HESS), which achieves balance between the battery string and supercapacitor string and reduces the system complexity.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Yao-Ching Hsieh, Hung-Liang Cheng, En-Chih Chang, Wei-Di Huang
Summary: This article introduces a novel dc-dc LED driver utilizing an interleaved converter, achieving zero-voltage switching with coupled inductors and high efficiency. Experimental results demonstrate that all semiconductor devices operate under ZVS or ZCS conditions, with a measured circuit efficiency as high as 95.0%.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Amin Asghari
Summary: This article presents a new non-isolated interleaved dc-dc converter with extremely extended duty cycle and low current ripple. The converter employs interleaved architecture and complementary operation of switches to achieve zero voltage switching condition and reduce output current ripple, resulting in improved efficiency.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Jaeyeon Lee, Hyeonju Jeong, Tat-Thang Le, Sewan Choi
Summary: A three-phase single-stage bidirectional ac-dc converter with low component count is proposed in this article. The converter is configured by integrating a three-phase ac-dc converter and a three-phase dual active bridge converter. Power factor correction and bidirectional power control are achieved by adjusting the modulation index of sinusoidal pulse width modulation (SPWM) and phase-shift angle between the primary and secondary bridges. The proposed converter features true high-frequency isolation by absorbing the low-frequency components generated by SPWM using fundamental blocking capacitors.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Liangzong He, Xinyong Xu
Summary: This article proposes a bidirectional bridge modular switched-capacitor (BBMSC) dc-dc converter with soft switching and multiple phase shift control methods. The advantages of different phase shift control methods are analyzed and compared by analyzing the topology, phase shift control scheme, and operating states. The comparison of different phase shift control methods is validated by experimental results.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Hong Li, Haitao Du, Yangbin Zeng, Zhidong Qiu, Xiaheng Jiang, Ziqi Chen
Summary: In this paper, a modified interleaved capacitor clamped (MICC) dc-dc converter with non-resonant soft-switching (NRSS) is proposed. By using an auxiliary inductor, the converter achieves zero-current switching for all switches and diodes. The converter consists of an interleaved boost structure as the front stage and the MICC structure with NRSS as the output stage, reducing current ripple and stress on components, and achieving high voltage gain.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Hamzeh J. Ahmad, Makoto Hagiwara
Summary: This article presents an interleaved bidirectional chopper with auxiliary converters for onboard energy storage systems, aiming to reduce the mass and volume of current-smoothing inductors. The proposed chopper consists of multiple subconverters, each including a bidirectional chopper cell, a current-smoothing inductor, and an auxiliary converter. The auxiliary converters can be used to suppress ripple current and protect the low-voltage side against faults.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Jong-Won Lim, Jamil Hassan, Minsung Kim
Summary: This article introduces a bidirectional soft-switching push-pull resonant converter that operates efficiently over a wide range of battery voltages, achieving almost zero-voltage switching at turn-off instants and maintaining high efficiency even during high-frequency operation. Additionally, the converter has a high conversion ratio in both power flow directions without the need for a transformer with a high turns ratio.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Yueshi Guan, Yi Cheng, Tingting Yao, Yijie Wang, Wei Wang, Dianguo Xu
Summary: This article proposes a high-performance modified Y-source dc-dc converter that achieves soft switching characteristics and improved voltage gain. By utilizing one coupled inductor winding and constructing a resonant cell with switch parasitic capacitor, the converter enables zero voltage switching (ZVS) for the switch and zero current switching for the diodes. The control strategy of hybrid pulsewidth modulation and pulse frequency modulation (PFM) ensures ZVS operation within a wide range.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Renjun Hu, Zhixing Yan, Lei Wang, Man-Chung Wong, Jun Zeng, Junfeng Liu, Bihua Hu
Summary: This article proposes an interleaved coupled-inductor (CI) based bidirectional dc-dc converter (BDC) with a higher voltage conversion ratio (VCR). The CI in this topology can function as both a filter inductor and a transformer, improving power density. The turns ratio of the CI is used to improve VCR and reduce voltage stress. The interleaved technique achieves low current ripple and reduced current stress. The control method employs pulsewidth modulation plus phase-shift (PPS) control, achieving soft-switching and high transmission efficiency.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Bo Li, Ping Wang, Zhishuang Wang, Xiaochen Ma, Huakun Bi
Summary: This paper introduces a new soft switching high voltage gain interleaved dc-dc converter for fuel cell vehicles, featuring low input current ripple and high voltage gain. By using a simple auxiliary circuit, all power switches can operate under soft switching conditions effectively. The proposed converter's main characteristics are validated through a 1-kW laboratory prototype.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Baharak Akhlaghi, Hosein Farzanehfard
Summary: This paper presents a new non-isolated high step-up converter with interleaved structure and resonant operation, which achieves high voltage gain and full soft switching performance while utilizing low number of components. The converter also features small size, low cost, low current ripple, and high efficiency.
IET POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Mohsen Packnezhad, Pouria Talebi, Hosein Farzanehfard
Summary: This paper presents a fully soft switched high step-up/down bidirectional converter. The high voltage conversion ratio is achieved using coupled inductors and a switched capacitor, while all active switches operate with zero voltage switching. Active clamp circuits are used in both operating modes to provide soft switching condition for the main switches and absorb the leakage inductance energy. The proposed converter eliminates the reverse recovery problem by using active switches body diodes that turn off at zero current switching (ZCS), and reduces the voltage stress of the main switches compared to the basic bidirectional buck/boost converter.
IET POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Siamak Khalili, Morteza Esteki, Mohsen Packnezhad, Hosein Farzanehfard, S. Ali Khajehoddin
Summary: This article presents a fully soft-switched expandable high step-down dc-dc converter. The integration of synchronous buck and Cuk converters allows for a high step-down voltage conversion ratio and low component count. The splitting of the input voltage reduces the switches' conduction loss and the soft-switching operation of semiconductor devices mitigates switching losses and reverse recovery problems. The converter's efficiency is significantly improved by utilizing a switch for soft-switching operation and synchronous rectification. The converter also features a common ground between input and output and a continuous output current without additional current ripple cancellation methods. The proposed converter's operating principles and analysis are discussed, and the implemented prototype verifies its operation and performance.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Pouria Talebi, Mohsen Packnezhad, Hosein Farzanehfard
Summary: In this article, a fully soft-switched ultra-high-voltage gain converter with very low switch voltage stress is proposed. The converter combines two phases of a high step-up boost converter to achieve ultra-high-voltage gain and very low switch voltage stress. By operating the main and auxiliary switches at zero-voltage switching and turning off all diodes at zero-current switching, the converter mitigates the reverse recovery problem and switching loss. Furthermore, the converter allows the use of MOSFETS with low drain-source resistance to reduce conduction loss.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Maryam Hajilou, Mohsen Packnezhad, Hosein Farzanehfard
Summary: This paper presents a fully soft switched high step-up DC-DC converter based on quasi-Z-source converter. The voltage gain is boosted by combining coupled inductors and switched capacitor techniques. Moreover, a ZVT cell comprising of only a single switch and an inductor coupled to the quasi-Z-source inductor is utilized to reduce the magnetic cores and realize soft switching for all semiconductors without imposing any extra voltage or current stress on the converter elements.
IET POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Navid Molavi, Hosein Farzanehfard
Summary: This article presents a nonisolated resonant light-emitting diode (LED) driver based on the LCLC resonant network. The adopted LCLC network provides load-independent current for the LED string and optimizes the soft switching range and rms current of the semiconductor devices. A single auxiliary switch with pulsewidth modulation (PWM) control is used to regulate the output current within a wide input voltage range. The auxiliary switch also provides PWM dimming and open-load protection features. The theoretical analysis and the impact of the auxiliary switch snubber capacitor on the load-independent output current characteristic are discussed.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Saeed Zare, Hosein Farzanehfard
Summary: This article presents a novel single-switch discontinuous current-source gate driver (CSD) suitable for ultralow voltage applications with voltage boosting capability. The CSD ensures a constant and high gate current during switching transitions, reducing both turn-ON and turn-OFF transient intervals and consequently the switching losses. Other advantages include low number of components, high C dv dt immunity, and the ability to decrease the drain-source ON-resistance (R-DS(on)).
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Shirin Askari, Hosein Farzanehfard
Summary: In this article, a simple and efficient nonisolated constant output current resonant converter is proposed, which is applicable to wide input voltage range and high-efficiency applications. The proposed converter combines a buck-boost converter with a half-bridge LCC resonant converter to improve the adjustable voltage conversion ratio. It achieves a constant output current feature and high efficiency through direct power feeding and cascaded outputs structure. The converter operates at the resonant frequency and can achieve zero-voltage switching and zero-current switching operations.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Baharak Akhlaghi, Hosein Farzanehfard, Dhananjay Thiruvady, Rasoul Faraji, Fatemeh Shiri
Summary: In this paper, a novel interleaved high step-up (HSU) converter is proposed with a large voltage gain and common input-output grounding. The converter achieves soft switching (SS) performance for all the semiconductors over a wide range of load variations by using only one zero voltage transition (ZVT) auxiliary circuit with one auxiliary switch and low number of elements, leading to advantages of high efficiency and low complexity, expense, and size. The simulation results are presented to confirm the effectiveness of the proposed converter.
2023 14TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE, PEDSTC
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Maryam Hajilou, Shirzad Gholami, Hosein Farzanehfard
Summary: An ultra-high step-up quadratic converter is presented, utilizing voltage multiplier cells and coupled inductors to boost voltage gain. The converter incorporates an active clamp circuit to absorb leakage inductance energy and enable soft switching conditions, eliminating switching and capacitive turn-on losses. Additionally, the diodes benefit from a zero current condition at turn-off, mitigating the reverse recovery problem. With reduced voltage stress, low on-resistance switches can be used, resulting in reduced conduction losses and increased efficiency. The proposed converter features a common ground and continuous input current, addressing the instability issue associated with conventional boost converters. Experimental implementation of a 48V to 380V, 200W prototype validates the theoretical analysis.
2023 14TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE, PEDSTC
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Ali Masoud, Mohsen Packnezhad, Hosein Farzanehfard
Summary: This paper presents a single-switch ultra-high step-up DC-DC converter with low voltage stress based on quadratic Y-sources topology. The converter's continuous input current makes it suitable for photovoltaic applications. The duty cycle of the proposed converter is wide, unlike many converters based on impedance-source networks. By combining quadratic boost and Y-source structures, the proposed converter achieves ultra-high voltage gain with only one switch. The converter's usual high switch voltage stress drawback is significantly reduced by shifting the switch to the low voltage side. The theoretical analysis, simulation circuit, and comparison section support the advantages of the proposed converter.
2023 14TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE, PEDSTC
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Erfan Meshkati, Hosein Farzanehfard
Summary: A family of non-isolated high step-up multi-input DC-DC converters is proposed for a battery-photovoltaic power system. The converter combines three-port boost and buck topologies and utilizes switched capacitor technique to achieve continuous battery current and low voltage stress on semiconductor elements. This design improves battery lifetime and efficiency.
2023 14TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE, PEDSTC
(2023)
Article
Automation & Control Systems
Fereshteh Ahmadi, Hosein Farzanehfard, Ehsan Adib
Summary: This article presents a new fully soft-switched nonisolated high-step-down converter that achieves improved efficiency through simplified circuit structure and the use of special switches and rectifiers.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Atefe Shameli, Mohammad Moghsoudi, Hosein Farzanehfard
Summary: This article presents a new bridgeless Cuk power factor correction converter that achieves full soft switching operation for all semiconductor components. The converter operates in discontinuous conduction mode (DCM) to achieve low input current total harmonic distortion (THD) without the need for any input filter. Despite higher current stress on semiconductors, the proposed converter achieves high efficiency due to its soft switching operation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
