Steady-state analysis of the LLC series resonant converter

Lazar, James; Martinelli, R. M.

doi:10.1109/apec.2001.912451

Cited by 243 publications

(74 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If not well designed, ZVS may be lost at light load and low voltage conditions due to insufficient turn off current [31]. Additional control methods such as extended-phase-shift (EPS) and dual-phaseshift (DPS) can be applied to extend the ZVS operation range [36]- [37].…”

Section: Ac-ac Applicationsmentioning

confidence: 99%

See 1 more Smart Citation

15 kV SiC MOSFET: An Enabling Technology for Medium Voltage Solid State Transformers

et al. 2017

View full text Add to dashboard Cite

Abstract-Due to much higher achievable blocking voltage and faster switching speed, power devices based on wide bandgap (WBG) silicon carbide (SiC) material are ideal for medium voltage (MV) power electronics applications. For example, a 15 kV SiC MOSFET allows a simple and efficient two-level converter configuration for a 7.2 kV solid state transformer (SST) for smart grid applications. Compared with multilevel input series and output parallel (ISOP) solution, this approach offers higher efficiency and reliability, reduced system weight and cost by operating at medium to high switching frequency. However, the main concern is how to precisely implement this device in different MV applications, achieving highest switching frequency while maintaining good thermal performance. This paper reviews the characteristics of 15 kV SiC MOSFET and offers a comprehensive guideline of implementing this device in practical MV power conversion scenarios such as AC-DC, DC-DC and AC-AC in terms of topology selection, loss optimization and thermal management.Index Terms-15 kV SiC MOSFET, efficiency, medium voltage, medium voltage power electronics, reliability, solid state transformer, smart transformer.

show abstract

Section: Ac-ac Applicationsmentioning

confidence: 99%

“…This circuit also shows a good capability in bidirectional power flow and voltage regulation. The turn off current of a normal SPS controlled DAB can be expressed in as [31] (7) Fig. 17.…”

Section: Ac-ac Applicationsmentioning

confidence: 99%

15 kV SiC MOSFET: An Enabling Technology for Medium Voltage Solid State Transformers

et al. 2017

View full text Add to dashboard Cite

show abstract

“…In addition, a very large circulating energy is needed to achieve the ZVS operation of the converter switches. To resolve these problems, the full-bridge LLC resonant converter is frequently used, which has many good characteristics, such as its simple structure, excellent ZVS operation, and the low voltage stress of main power switches [18,19]. However, this converter also has problems, such as a higher current stress and larger conduction loss on both sides of the transformer.…”

Section: Introductionmentioning

confidence: 99%

Simple High Efficiency Full-Bridge DC-DC Converter using a Series Resonant Capacitor

Jeong¹,

Kwon²,

Park³

2016

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-This paper presents a simple high efficiency full-bridge DC-DC converter using a series resonant capacitor. The proposed converter achieves the zero voltage switching of the primary switches under a wide range of load conditions and reduces the high circulating current in the freewheeling mode using the leakage resonant inductance and the series resonant capacitor. Thus, the proposed converter overcomes the drawbacks of the conventional full-bridge DC-DC converter and improves its overall system efficiency. Its structure is simplified by using the leakage inductance of the transformer as the resonant inductance and omitting the DC output filter inductance. Also it can operate over a wide range of input voltages. In this paper, the operational principle, analysis and design example are described in detail. Finally, the experimental results from a 650W (24V/27A) prototype are demonstrated to confirm the operation, validity and features of the proposed converter.

show abstract

“…Theoretically, there will be no switching losses, as the product of voltage over and current through the switch remains zero. With MOSFETs, it is of great importance to use Zero-Voltage Switching (ZVS) to avoid the capacitive discharge losses of the MOSFET output capacitance C OSS [6][1]. In this work a half-bridge topology is chosen because the power of the converter is not big enough so that the use of a full bridge is justified.…”

Section: Introductionmentioning

confidence: 99%

“…Higher efficiency combined with smaller passive components can be achieved [1] [2]. Resonant converters employ soft switching techniques to minimize switching losses and improve EMIgeneration by using sine-shaped waveforms [3].…”

Section: Introductionmentioning

confidence: 99%

Design, construction and control of a quasi-resonant SMPS working at 2 MHz.

Uytterhoeven¹,

Jacqmaer

Driesen

2008

2008 IEEE International Conference on Sustainable Energy Technologies

View full text Add to dashboard Cite

Abstract-Switching Mode Power Supplies with higher switching frequencies are, in general, smaller in size for the same power rating. Resonant converters have an advantage over PWM-type converters because they use soft switching, reducing losses and increasing the energy efficiency of the power electronic circuit. In this paper, a converter is designed having a switching frequency more than 2 MHz. The power is regulated and varies between 15 and 50 W, at a constant output voltage of 15 V. An LLC-type topology is chosen as resonant tank, in which the parasitic transformer leakage inductance is efficiently employed. An experimental converter was built, handling 50 W at 1.4 MHz. The efficiency is up to 60 % at full load..

show abstract

Steady-state analysis of the LLC series resonant converter

Cited by 243 publications

References 6 publications

15 kV SiC MOSFET: An Enabling Technology for Medium Voltage Solid State Transformers

15 kV SiC MOSFET: An Enabling Technology for Medium Voltage Solid State Transformers

Simple High Efficiency Full-Bridge DC-DC Converter using a Series Resonant Capacitor

Design, construction and control of a quasi-resonant SMPS working at 2 MHz.

Contact Info

Product

Resources

About