Analysis and implementation of a new zero current switching flyback inverter

Ansari, Sajad Arab; Moghani, Javad Shokrollahi; Mohammadi, Mohammad

doi:10.1002/cta.2577

Cited by 24 publications

(48 citation statements)

References 36 publications

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“…1 A major portion of electrical energy consumption is due to the lighting systems. 1 A major portion of electrical energy consumption is due to the lighting systems.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and implementation of soft‐switched bidirectional buck‐boost DC‐DC converter for solar PV‐fed LED street lighting systems

Veeramallu

Porpandiselvi

Narasimharaju

2019

Circuit Theory & Apps

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This paper presents a single-stage solar photovoltaic (SPV) fed light-emitting diode (LED) street lighting system (LED-SLS) using a novel soft-switched buck-boost bidirectional DC-DC converter (BDC). A coupled inductor (CI) based auxiliary circuit is used in the proposed BDC to achieve soft switching, which leads to improved efficiency with reduced ripple. As SPV power is available during day time alone, a battery storage system (BSS) is used. The BSS is charged from SPV during day time through the proposed CI-BDC. The BSS powers the LED-SLS during night time through the same CI-BDC. The proposed CI-BDC provides various advantages like buck/boost operation in either direction of power flow, zero voltage switching (ZVS) soft-switching, use of single magnetic core, high efficiency, reduced ripple in output current, and simple control. Also, it provides an illumination control of the LED-SLS using pulse-width modulation (PWM) dimming. To maintain high efficiency even at light loads, the proposed CI-BDC works as conventional BDC by turning OFF the auxiliary circuit. Thus, avoiding the high conduction losses in it at light loads. The detailed working principle and design analysis are presented along with simulation results. A prototype of 40 W LED lighting system has been developed, and experimental validation is presented. KEYWORDSbidirectional, buck-boost, coupled inductor, LED driver, soft switching 1990

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“…1 A major portion of electrical energy consumption is due to the lighting systems. 1 A major portion of electrical energy consumption is due to the lighting systems.…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, solar photovoltaic (SPV) systems are playing a vital role in energy utilization due to its various advantages. 1 A major portion of electrical energy consumption is due to the lighting systems. The load on the grid can be reduced by using renewable energy resources.…”

Section: Introductionmentioning

confidence: 99%

Analysis and implementation of soft‐switched bidirectional buck‐boost DC‐DC converter for solar PV‐fed LED street lighting systems

Veeramallu

Porpandiselvi

Narasimharaju

2019

Circuit Theory & Apps

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“…The flyback converter is one of the interesting topologies to increase the voltage gain. Nonetheless, the leakage inductance of the flyback transformer causes voltage spike across the main switch during the turn‐off process …”

Section: Introductionmentioning

confidence: 99%

“…Nonetheless, the leakage inductance of the flyback transformer causes voltage spike across the main switch during the turn-off process. 2,3 In this topology, a passive snubber circuit including diode and capacitor is used to limit the voltage overshoot across the switches. An isolated high gain DC-DC converter with voltage doubler technique and non-dissipative snubber is proposed in Lee et al 12 In Wu et al, 13 a coupled inductor-based converter is presented, which employs switched-capacitor technique to achieve a high voltage conversion gain.…”

Section: Introductionmentioning

confidence: 99%

Single switch quadratic boost converter with continuous input current for high voltage applications

Mirzaee

Ansari

Moghani

2020

Circuit Theory & Apps

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Summary In this paper, a novel non‐isolated very high step‐up DC‐DC converter is presented. The introduced converter benefits from various advantages, namely, very high voltage gain, low voltage stress on the active switch, and continuous input current with low ripple. Therefore, the presented converter is suitable for renewable energy applications. In addition, the energy of the leakage inductance of the coupled inductor is successfully recovered, and the voltage spike of the active switch is clamped during the turn‐off process. Hence, a switch with low Rds−on can be used, which decreases the conduction losses as well as cost of the converter. Furthermore, the voltage stress of the output diode is decreased, which reduces the reverse recovery problem. The steady‐state analysis and design considerations of the proposed converter are discussed. Finally, the theoretical analysis is validated with the experimental results at an output power of 150 W.

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“…The various inverters which can be employed in singlephase grid-connected PV application are reviewed in [3,28]. Among the numerous topologies, flyback inverter is widely used in microinverters because it has many advantages such as simple configuration, low manufacturing cost, high efficiency, no DC-DC step-up converter, and isolation between the input source and public grid [29][30][31]. Hence, the flyback inverter should be modified to support the LVRT capability.…”

Section: Introductionmentioning

confidence: 99%

Fault Ride-Through Capability Enhancement for Microinverter Applications

Ansari

Mizani

Ashouri

et al. 2019

Journal of Renewable Energy

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Due to the fast growth of single-phase grid-connected photovoltaic (PV) systems, the existing grid codes are expected to be modified to guarantee the availability, quality, and reliability of the electrical system. Therefore, the future single-phase PV systems should become smarter and support low voltage ride-through (LVRT) capability, which are required for three-phase wind power systems. In this paper, the operation principle of a flyback inverter in a low-voltage ride-through operation is demonstrated in order to map future challenges. The steady state performance of the flyback inverter under voltage rise and drop conditions at boundary conduction mode (BCM) and discontinues conduction mode (DCM) is studied theoretically. The simulation results of the flyback inverter for various grid faults are presented to verify the theoretical analyses. The results indicate the fact that the flyback inverter at BCM condition can provide LVRT capability for photovoltaic microinverter applications in distributed generation (DG) systems, even though it does not need any auxiliary control branches and any limitations in components design.

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Analysis and implementation of a new zero current switching flyback inverter

Cited by 24 publications

References 36 publications

Analysis and implementation of soft‐switched bidirectional buck‐boost DC‐DC converter for solar PV‐fed LED street lighting systems

Analysis and implementation of soft‐switched bidirectional buck‐boost DC‐DC converter for solar PV‐fed LED street lighting systems

Single switch quadratic boost converter with continuous input current for high voltage applications

Fault Ride-Through Capability Enhancement for Microinverter Applications

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