Power-loss breakdown of a 750-V, 100-kW, 20-kHz bidirectional isolated DC-DC converter using SiC-MOSFET/SBD dual modules

Akagi, Hirofumi; Yamagishi, T.; Tan, Nadia M. L.; Kinouchi, Shin‐ichi; Miyazaki, Yuji; Koyama, Masato

doi:10.1109/ipec.2014.6869672

Cited by 24 publications

(9 citation statements)

References 18 publications

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“…As (19) demonstrates, leakage inductance Ls is proportional to the square of primary winding turns Np• So by changing the number of primary winding turns, leakage inductance Ls, the key parameter in the energy transfer process of DAB converter, can be adjusted on a large scale, enabling the possibility of reducing loss over wide load range.…”

Section: A Leakage Inductance Variation With Winding Turnsmentioning

confidence: 99%

“…A 750-V 100-kW 20-kHz bidirectional isolated dual active bridge (DAB) dc dc converter is constructed in [19], and its overall power loss is divided into conduction and switching losses produced by the SiC modules, the iron and copper losses due to magnetic devices, and the other unknown loss. An adaptive inductor is proposed in [20] as the main energy transfer element of a phase-shift dual half bridge (DRB) converter so that the circulating energy can be optimized to maintain ZVS at light load and minimize the conduction losses at heavy load as well.…”

mentioning

confidence: 99%

“…However, the phase-shift dual-bridge dc-dc converters such as DAB and DHB converters have been reported in [19] - [25] can operate in the ZVS mode only within a limited region restricted by the converter voltage ratio of input to output and the load condition, and suffer additional conduction losses due to the circulating energy at heavy load. Consequently, high efficiency can be achieved only within a limited load range.…”

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confidence: 99%

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Research on loss reduction of dual active bridge converter over wide load range for solid state transformer application

Wang

Liang

2016

2016 Eleventh International Conference on Ecological Vehicles and Renewable Energies (EVER)

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This paper presents the design of new high frequency transformer isolated bidirectional dc-dc converter modules connected in module-cascaded solid state transformer (SST). A phase-shift dual active bridge (DAB) converter is employed to achieve high-frequency galvanic isolation, bidirectional power flow, and zero voltage switching (ZVS) of all switching devices, which leads to low switching losses even with high-frequency operation. Bidirectional DC-DC converter is crucial to the power transmission in SST. The proposed DAB converter consists of two three-leg bridges and a high-frequency transformer with winding shunting taps. Furthermore, the commutation inductance connected in series with the transformer in the conventional DAB converter is integrated into the transformer windings, thus, enjoying smaller volume and higher power density. By changing the number of primary winding turns, leakage inductance, which is the key parameter in the energy transfer process of DAB converter, can be adjusted on a large scale, enabling the possibility of reducing loss over wide load range. Additionally, time-sharing circuit topology and operation mode are adopted to adapt to the output power by detecting the output current as the feedback. As a result, the efficiency at both light and heavy load can be significantly improved compared with the conventional DAB converter, and, therefore, high efficiency over wide load range and high power density can be achieved. Besides, the additional bridge arm structure along with a flexible control scheme provides possible high-level fault tolerance. Finally, the simulation results on a 2-kW DAB converter module switching at 10kHz are presented to validate the theoretical analysis. Keywords-solid state transformer (SST); dual active bridge (DAB); circulating energy; zero voltage switching (ZVS); high efficiency. 978-1-5090-2464-3/16/$31.00 ©2016 IEEE I. INTRODUCTION Fig.I. The Energy Internet diagram.Sustainable energy distributed generation is paid tremendous attention in the last decade due to energy shortage and environmental pollution issues. However, the inherent intermittence and randomness in renewable energy sources pose stiff challenges for the traditional power management system. In order to achieve optimization control of the entire grid, many promising schemes of the smart grid concept have been put forward by experts until the present time. The Energy Internet is a representative one which provides intelligent energy management (IEM) ports for the plug-and-play integration of the distributed renewable energy resources (DRER), the distributed energy storage devices (DESD), and ac/dc loads, as shown in Fig. l. The intelligent fault management (IFM) is responsible for fault isolation, used for protecting the system. In order to enable intelligent management and remote monitoring, the distributed grid intelligence (DGI) unit, which integrates both advanced control and communication functions, is embedded into the IEM and IFM for fulfilling the needs of the smart grid concept. What's...

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Section: A Leakage Inductance Variation With Winding Turnsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Research on loss reduction of dual active bridge converter over wide load range for solid state transformer application

Wang

Liang

2016

2016 Eleventh International Conference on Ecological Vehicles and Renewable Energies (EVER)

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“…In the power electronics field, on the other hand, SiC (Silicon Carbide) has recently been attracting significant attention for its dominant features such as lower power loss, high‐speed and high‐temperature operation . The SiC's dielectric breakdown electric field is larger than that of Si by about a digit and thus the SiC chip thickness can be reduced to 1/10 of the Si thickness thereby reducing on‐resistance in conductive mode theoretically by two digits or more.…”

Section: Introductionmentioning

confidence: 99%

Converter Using SiC‐MOSFET for Ultra‐High‐Speed Elevator

Katoh

Mori

Matsumoto

et al. 2017

Electrical Engineering Japan

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SUMMARY In this study, we developed a converter based on SiC (Silicon Carbide)‐MOSFET for use in ultra‐high‐speed elevators, with a reduced volume of 15% compared with the conventional converter. We succeeded in reducing the power loss of the converter unit by 56% compared to the conventional converter in one round trip under high temperature condition. Recently, because of their useful characteristics, wide‐gap semiconductors, such as SiC and GaN, have gained considerable attention for use in various applications in the power electronics systems. Therefore, we studied the use of a converter in elevator systems based on SiC‐MOSFET. We used a 1200 V/800 A SiC‐MOSFET module for the converter unit. We developed a prototype of the converter unit and the control panel by applying for the SiC‐MOSFET module for an ultra‐high‐speed elevator. As a result, the setting area of the control panel (main part) becomes less than 43% of the conventional panel. We tried to demonstrate the working of a 68‐kW elevator by applying the prototype control panel. Because of the characteristic of the switching loss of SiC‐MOSFET, the power loss of the converter unit has almost no dependence on temperature. An energy‐saving effect of approximately 17% was achieved in the total elevator system in one round trip under high‐temperature condition.

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“…The Dual Active Bridge DC-DC Converter is most often the topology of choice for applications where bi-directional power flow is required between two DC sources, with its inherent capability to transfer energy in either direction without control complexity or increased component count [1] and its particular advantages of efficiency [2], galvanic isolation and high power density. However, to maintain high DAB conversion efficiency it is desirable to operate as much as possible using Zero-Volt-Switching (ZVS) to minimise device switching losses, particularly as the converter switching frequencies increase with fast switching Silicon-Carbide and Gallium-Nitride (GaN) devices [3].…”

Section: Introductionmentioning

confidence: 99%

Identifying ZVS soft switching boundaries for bi-directional dual active bridge DC-DC converters using frequency domain analysis

Riedel

Holmes

McGrath

2015

2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)

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Dual Active Bridge (DAB) converters offer an unmatched capability to transfer energy in either direction between two DC sources, while also providing galvanic isolation and high conversion efficiency. However, to operate at high efficiencies, the bridges must operate with Zero-Voltage-Switching (ZVS) over as wide an operating range as possible. The conventional approach to determine ZVS operation uses time domain analysis with ideal AC coupling inductances, which only approximately identifies the ZVS boundaries. This paper proposes a new approach using frequency domain analysis of the bridge switching patterns, which accurately predicts the ZVS boundaries over a full range of operating conditions while also accommodating more complex AC coupling structures and practical impedance non-idealities. An exact theoretical analysis is presented for two level modulation of the two bridges coupled through a general impedance structure. An analytical solution is then presented for a single coupling impedance, while boundaries for more complex coupling structures and practical impedances are solved by numerical integration. ZVS boundaries for selected systems are validated by matching simulation and experimental results.

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Power-loss breakdown of a 750-V, 100-kW, 20-kHz bidirectional isolated DC-DC converter using SiC-MOSFET/SBD dual modules

Cited by 24 publications

References 18 publications

Research on loss reduction of dual active bridge converter over wide load range for solid state transformer application

Research on loss reduction of dual active bridge converter over wide load range for solid state transformer application

Converter Using SiC‐MOSFET for Ultra‐High‐Speed Elevator

Identifying ZVS soft switching boundaries for bi-directional dual active bridge DC-DC converters using frequency domain analysis

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