Power Density Optimization of 700 kHz GaN-Based Auxiliary Power Module for Electric Vehicles

Naradhipa, Adhistira M.; Kim, Sangjin; Yang, Daeki; Choi, Sewan; Yeo, In‐Young; Lee, Younsik

doi:10.1109/tpel.2020.3026328

Cited by 51 publications

(8 citation statements)

References 31 publications

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“…After substituting ( 9) into (7) and simplifying ( 7) by ignoring a 'large' L M , the transfer function can be approximated as (10).…”

Section: B Blocking Capacitor (C B ) Designmentioning

confidence: 99%

“…Due to the benefits of zero-voltage switching (ZVS), phase shifted full bridge (PSFB) isolated converters are widely used in many modern industrial applications, such as renewable energy conversion [1], electric vehicle charging [2], [3], and telecommunication systems' power supply [4], [5]. PSFB converter has the benefits of wide gain range and fixed switching frequency over LLC resonant converter [6], has lower switch voltage rating compared to active clamp converter [7], and lower complexity than dual active bridge (DAB) converter [8], for unidirectional power flow.…”

Section: Introductionmentioning

confidence: 99%

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Improved Circuit Design and Adaptive Burst Mode Control in PSFB Converters for Higher Efficiency Over a Wide Power Range

2022

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This paper presents an improved circuit design of Gallium Nitride (GaN) based phase shifted full bridge (PSFB) converters along with a new adaptive burst mode control strategy, to achieve high efficiency over a wide power range, including light loads. The main challenges of PSFB converters addressed in this paper are: load-dependent zero-voltage switching (ZVS), transformer saturation, and secondary side ringing. Since switching losses of GaN FETs are dominant at light loads, adaptive burst mode control can be employed to improve the efficiency at lower output power. By periodically switching output current between 0 A and minimum ZVS current, adaptive burst mode control can enable both smaller effective switching frequency and lower switching losses. A correction factor 'k' is adopted in the adaptive burst mode control's current loop PI calculation so that the output current can switch fast without any overshoot that increases switches' current stress. To verify the effectiveness of the proposed circuit and controller design, a 375 V input, 70 V output, 800 W PSIM simulation model as well as experimental prototype are developed and tested. The experimental results demonstrate the practical benefits of the proposed adaptive burst mode control.INDEX TERMS Phase shifted full bridge (PSFB), zero-voltage switching (ZVS), burst mode control, Gallium Nitride (GaN) FETs, wide range efficiency improvement.

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“…After substituting ( 9) into (7) and simplifying ( 7) by ignoring a 'large' L M , the transfer function can be approximated as (10).…”

Section: B Blocking Capacitor (C B ) Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improved Circuit Design and Adaptive Burst Mode Control in PSFB Converters for Higher Efficiency Over a Wide Power Range

2022

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“…Power modules used in such as automobiles and electric power devices for new energy have been miniaturized and increased in power density due to the cost reduction demand [1,2]. The heat generation density per unit volume also increases due to the miniaturization and high‐power density of equipment.…”

Section: Introductionmentioning

confidence: 99%

Electrical Treeing Breakdown Characteristics of Epoxy/Spherical Boron Nitride with Card‐House Structure Composites

Murakami

Noda

Kawashima

et al. 2021

IEEJ Transactions Elec Engng

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A spherical boron nitride with a card‐house structure (sBNch) was developed to enhance the filler's thermal property. To develop a thermal conductive insulating composite material with higher thermal conductive and acceptable electrical breakdown strength, an epoxy (EP)/an sBNch composite was produced. The treeing breakdown voltage of the composite using a needle‐rod electrode and the thermal conductivity were measured. The treeing breakdown voltage of EP/sBNch composite with the sBNch content of 50 wt% was higher than that of EP without the sBNch. The protrusion on the surface of the sBNch increases the effective distance between the electrodes. The thermal conductivity of EP/sBNch composite with the sBNch content of 50 wt% was higher than that of EP. From these results, the sBNch is considered a strong candidate filler of a thermally conductive composite. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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“…In recent years, the Phase-Shifted Full-Bridge (PSFB) converter has been widely used in several applications such as renewable energy power systems [1,2], energy storage systems for electric vehicles [3][4][5], railway applications [6], server power supply unit [7], telecom power supplies or data centers [8,9], etc.…”

Section: Introductionmentioning

confidence: 99%

Small-Signal Modeling of Phase-Shifted Full-Bridge Converter Considering the Delay Associated to the Leakage Inductance

et al. 2021

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This paper demonstrates that in the Phase-Shifted Full-Bridge (PSFB) buck-derived converter, there is a random delay associated with the blanking time produced by the leakage inductance. This random delay predicts the additional phase drop that is present in the frequency response of the open-loop audio-susceptibility transfer function when the converter shows a significant blanking time. The existing models of the PSFB converter do not contemplate the delay and gain differences associated to voltage drop produced in the leakage inductor of the transformer. The small-signal model proposed in this paper is based on the combination of two types of analysis: the first analysis consists of obtaining a small-signal model using the average modeling technique and the second analysis consists of studying the natural response of the power converter. The dynamic modeling of the Phase-Shifted Full-Bridge converter, including the random delay, has been validated by simulations and experimental test.

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Power Density Optimization of 700 kHz GaN-Based Auxiliary Power Module for Electric Vehicles

Cited by 51 publications

References 31 publications

Improved Circuit Design and Adaptive Burst Mode Control in PSFB Converters for Higher Efficiency Over a Wide Power Range

Improved Circuit Design and Adaptive Burst Mode Control in PSFB Converters for Higher Efficiency Over a Wide Power Range

Electrical Treeing Breakdown Characteristics of Epoxy/Spherical Boron Nitride with Card‐House Structure Composites

Small-Signal Modeling of Phase-Shifted Full-Bridge Converter Considering the Delay Associated to the Leakage Inductance

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