Zero-Voltage Switching Operation of Transformer Class-E Inverter at Any Coupling Coefficient

Ayachit, Agasthya; Corti, Fabio; Reatti, Alberto; Kazimierczuk, Marian K.

doi:10.1109/tie.2018.2838059

Cited by 67 publications

(48 citation statements)

References 15 publications

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“…Where I p = i ref , and according to previous studies, 28,29 if the leakage inductance of the transformer is finite, the effective turns ratio between the primary and secondary will change. Thus, the relationship between the primary current I p and the secondary current I s of the transformer is achieved by Equation 16.…”

Section: Proposed Zcs Flyback Invertermentioning

confidence: 98%

Analysis and implementation of a new zero current switching flyback inverter

Ansari

Moghani

Mohammadi

2018

Circuit Theory & Apps

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In this paper, a novel zero current switching (ZCS) flyback inverter in discontinuous conduction mode (DCM) is proposed. In the proposed flyback inverter, the ZCS for the primary switch is achieved by adding a simple auxiliary circuit to the conventional flyback inverter. Also, the auxiliary switch is turned on and turned off at ZCS condition. Therefore, the switching losses of the switches are negligible, which increases the efficiency and allows higher switching frequency and more compact design. The resonant auxiliary cell is activated only in short transition times that makes its conduction losses negligible. Furthermore, the voltage overshoot of the main switch is limited during the turn-off process, which allows utilization of lower voltage metal-oxide semiconductor field-effect transistors (MOSFETs) with low conduction losses and low cost. The detailed operation of the flyback inverter with auxiliary circuit and design considerations are presented. Simulation and experimental results are presented to verify the performance of the proposed inverter.

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Section: Proposed Zcs Flyback Invertermentioning

confidence: 98%

Analysis and implementation of a new zero current switching flyback inverter

Ansari

Moghani

Mohammadi

2018

Circuit Theory & Apps

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“…Since the input impedance of the proposed resonant circuit is controlled at the inductive load, Q 1~Q8 can be turned on under zero voltage switching. The power loss analysis of the resonant converter or inverters has been discussed in [17,18] for fixed switching frequency. However, the switching frequency of the resonant converter is variable.…”

Section: Circuit Analysis and Design Proceduresmentioning

confidence: 99%

Implementation of a Parallel-Series Resonant Converter with Wide Input Voltage Range

Lin¹

2019

Energies

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A new resonant converter is presented to have the advantages of soft switching operation on power devices, without reverse recovery current loss on power diodes and wide input voltage range operation. Resonant converter with frequency modulation is adopted in the proposed circuit to accomplish the low switching loss on power switches and possible zero current switching operation on fast recovery diodes. To improve the problem of limit voltage range operation in the conventional resonant converter, a new parallel-series structure resonant converter is studied to achieve wide input voltage operation capability, such as from Vin,min to 4Vin,min. A 1.8 kW laboratory circuit is implemented, and the measured results are provided to confirm the theoretical analysis and circuit performance.

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“…Both K coefficient and turn ratio have important roles in converter operation mode, and also with selecting appropriate K coefficient the resonant tank current can be reduced to the desired value. In fact, the effect of K coefficient has been studied clearly in Ayachit and Kazimierczuk and Ayachit et al; however, they did not analyze LLC converters. If the K value increases, the resonance current will decrease; in addition, the increase of K of certain extent has no significant effect on current magnitude regarding the exponential relation between K and resonant current magnitude.…”

Section: Designing Proceduresmentioning

confidence: 99%

A new design strategy for DC/DC LLC resonant converter: Concept, modeling, and fabrication

Khosrogorji

Soori

Torkaman

2019

Circuit Theory & Apps

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Summary In this paper, a new design procedure for LLC converter has been introduced. In fact, this method is a computer‐based design algorithm based on a numerical technique. In the process of designing, the value of the resonant element is obtained by solving the LLC converter fundamental equation. This converter will be controlled by using state feedback, such as output voltage variable. As a matter of fact, in a control system, the change of output voltage (because of load variation) will affect the switching frequency, so the output voltage will be tuned. In the designing process, the fundamental equations of LLC converter are obtained, and the value of the resonant elements is calculated. Also, a comparison analysis is carried out between the proposed and typical methods. The simulation is done to investigate the validity of the proposed method. Moreover, a prototype is manufactured, and the experimental test is done to evaluate its applicability.

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Zero-Voltage Switching Operation of Transformer Class-E Inverter at Any Coupling Coefficient

Cited by 67 publications

References 15 publications

Analysis and implementation of a new zero current switching flyback inverter

Analysis and implementation of a new zero current switching flyback inverter

Implementation of a Parallel-Series Resonant Converter with Wide Input Voltage Range

A new design strategy for DC/DC LLC resonant converter: Concept, modeling, and fabrication

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