A Controllable 45-kW Current Source for DC Machines

Schwarz, Francisc C.; Klaassens, J.B.

doi:10.1109/tia.1979.4503684

Cited by 38 publications

(7 citation statements)

References 4 publications

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“…The resonant converter [21] and dual active bridge (DAB) converter [22] have received a lot of attention due to lower switching losses. The schematic of a DAB DC to DC converter is shown in Fig.…”

Section: System Configurationmentioning

confidence: 99%

H-bridge multilevel voltage source converter for direct grid connection of renewable energy systems

Islam

Guo

Zhu

2011

2011 IEEE PES Innovative Smart Grid Technologies

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The conventional approach based on low-voltage converter with power frequency transformer is commonly employed for grid connection of offshore renewable power generation systems. Because of the heavy weight and large size of the transformer, the system can be expensive and complex for installation and maintenance. As an alternative approach to achieve a compact and light direct grid connection, a high-voltage converter using series connected H-bridge (SCHB) multilevel converter topology is proposed in this paper. Since the SCHB converter requires a large number of isolated and balanced DC supplies, a high frequency transformer link is employed to couple the SCHB to the single low voltage DC supply. This paper presents the design and simulation of the proposed system. Index Terms--Renewable energy, direct grid connection, Hbridge multilevel converter, high-frequency transformer.

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Section: System Configurationmentioning

confidence: 99%

H-bridge multilevel voltage source converter for direct grid connection of renewable energy systems

Islam

Guo

Zhu

2011

2011 IEEE PES Innovative Smart Grid Technologies

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“…These include the single active-bridge (SAB) converters and resonant converters with the transformer in series with the resonant inductor. The SAB has significantly higher peak currents compared with traditional resonant converters [3]. An SRC can be considered as an SAB with a large inductance.…”

Section: Converter Topology Selectionmentioning

confidence: 99%

“…As a result, the device voltage is well defined, but the device can be damaged by a shoot-through fault. These converters are normally classified as series, parallel, or series-parallel resonant types [3]- [5]. The SRC connects the transformer primary in series with the resonant inductor and is the only converter that has a current stiff link.…”

Section: B Voltage-fed Topologiesmentioning

confidence: 99%

Design considerations and topology selection for a 120-kW IGBT converter for EV fast charging

Kutkut¹,

Divan

Novotny

et al. 1998

IEEE Trans. Power Electron.

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“…The medium frequency transformer (MFT) is one of the key components in the isolated dc-dc converters [1][2][3][4] related to: smart grids [5], photovoltaic power plants [6], wind power plants [7], and electric vehicle charging [8,9]. The three-phase topology is considered for high power applications where the high power density and high efficiency are required.…”

Section: Introductionmentioning

confidence: 99%

Effective Permeability of Multi Air Gap Ferrite Core 3-Phase Medium Frequency Transformer in Isolated DC-DC Converters

et al. 2020

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The magnetizing inductance of the medium frequency transformer (MFT) impacts the performance of the isolated dc-dc power converters. The ferrite material is considered for high power transformers but it requires an assembly of type “I” cores resulting in a multi air gap structure of the magnetic core. The authors claim that the multiple air gaps are randomly distributed and that the average air gap length is unpredictable at the industrial design stage. As a consequence, the required effective magnetic permeability and the magnetizing inductance are difficult to achieve within reasonable error margins. This article presents the measurements of the equivalent B(H) and the equivalent magnetic permeability of two three-phase MFT prototypes. The measured equivalent B(H) is used in an FEM simulation and compared against a no load test of a 100 kW isolated dc-dc converter showing a good fit within a 10% error. Further analysis leads to the demonstration that the equivalent magnetic permeability and the average air gap length are nonlinear functions of the number of air gaps. The proposed exponential scaling function enables rapid estimation of the magnetizing inductance based on the ferrite material datasheet only.

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A Controllable 45-kW Current Source for DC Machines

Cited by 38 publications

References 4 publications

H-bridge multilevel voltage source converter for direct grid connection of renewable energy systems

H-bridge multilevel voltage source converter for direct grid connection of renewable energy systems

Design considerations and topology selection for a 120-kW IGBT converter for EV fast charging

Effective Permeability of Multi Air Gap Ferrite Core 3-Phase Medium Frequency Transformer in Isolated DC-DC Converters

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