Development of 50-kW Isolated DC/DC Converter with High-Voltage IGBTs

Jalakas, Tanel; Vinnikov, Dmitri; Laugis, Juhan

doi:10.1109/cpe.2007.4296566

Cited by 18 publications

(11 citation statements)

References 2 publications

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“…This research mostly covers the half-bridge topology based the APS converter ( Fig. 2) developed for the 3 kV DC rolling stock [3]. General specifications are presented in Table II.…”

Section: Rectifier-stage Output Filtermentioning

confidence: 99%

Efficiency Optimization of the High-Power Isolated DC/DC Converters through THD and Losses Reduction in Isolation Transformers

Vinnikov¹,

Bolgov²

2024

RE&PQJ

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Abstract. This paper describes a method of improving efficiency of the high-power transformer-isolated DC/DC converters by means of proper selection of an inverter switch duty cycle. The paper revises old suggestions and recommendations for choosing the maximal duty cycle value on the basis of physical limits imposed by new solid-state devices. The resulting improved efficiency of the converter is described considering losses in separate energy conversion stages.

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“…This research mostly covers the half-bridge topology based the APS converter ( Fig. 2) developed for the 3 kV DC rolling stock [3]. General specifications are presented in Table II.…”

Section: Rectifier-stage Output Filtermentioning

confidence: 99%

Efficiency Optimization of the High-Power Isolated DC/DC Converters through THD and Losses Reduction in Isolation Transformers

Vinnikov¹,

Bolgov²

2024

RE&PQJ

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“…A simplified circuit diagram of the converter is shown in Fig. 1 [6]. and IGBT current path when T B is in on-state (c).…”

Section: Introductionmentioning

confidence: 99%

Simplified digital average current mode control algorithm for half- or full-bridge isolated DC/DC converters

Roasto

Vinnikov

2009

2009 35th Annual Conference of IEEE Industrial Electronics

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This paper proposes a new digital average current mode control method (AVCMC). Instead of sampling and summing the transformer primary current over the switching period, the average is calculated merely using two current values. Analysis of the primary current shape allows a simplified equation to be derived for the digital AVCMC. The method is adoptable in cases where current is growing linearly. In order to estimate maximal possible errors introduced by nonlinearity of the current slope, the paper analyzes and simulates different current shapes. Simulation results are verified on a real test prototype.

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“…This converter is based on two Infineon 200 A 6.5 kV IGBT modules (FZ200R65KF1). Investigations have shown that the experimental converter is capable of providing required performance within the whole range of rolling stock supply voltage of 2.2…4.0 kV and a wide power range -10…50 kW [1]. The converter consists of primary and secondary parts galvanically isolated by the high frequency transformer.…”

Section: Introductionmentioning

confidence: 99%

On Implementation Possibilities of High-Voltage IGBTs in Resonant Converters

Blinov

Vinnikov

2012

Technological Innovation for Value Creation

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Abstract. The conventional hard switching half-bridge topology used as a rolling stock auxiliary power supply unit has limited switching frequency due to high power losses in semiconductors. The study analyses LLC and LCC topologies in attempt to improve the performance of the converter and presents a simulation of the operation and an estimation of power losses.Keywords: resonant converter, half bridge, power losses. IntroductionAlong with the development of 6.5 kV IGBT modules, complex applications managed by series connection of numerous lower voltage semiconductors could be simplified by replacing them with a single 6.5 kV module, which would enable simple and reliable two-level half-bridge (HB) voltage-source inverter (VSI) topologies to be implemented for the rolling stock auxiliary power units. This research focuses on an experimental half-bridge converter recently developed at Tallinn University of Technology. This converter is based on two Infineon 200 A 6.5 kV IGBT modules (FZ200R65KF1). Investigations have shown that the experimental converter is capable of providing required performance within the whole range of rolling stock supply voltage of 2.2…4.0 kV and a wide power range -10…50 kW [1]. The converter consists of primary and secondary parts galvanically isolated by the high frequency transformer. The primary part is a square-wave twolevel half-bridge PWM inverter and the secondary part consists of a full-bridge rectifier and an LC filter. Such converters (Fig. 1a) are very simple in control and protection, have reduced component count and provide good reliability.Main concerns of this topology relate to parasitic oscillations after IGBT turn-off (Fig. 1b) [2], high power losses in semiconductors due to hard switching and consequently, limited switching frequency (around 2 kHz) because of thermal issues. This imposes increased requirements on the passive components of the converter and associated cooling system. As a result this leads to increased price and reduced power density of the converter. Several ways exist of how to improve the switching process of semiconductor switches in the HB inverters, which can be classified as asymmetrical, auxiliary switch, and resonant converters [3].This however, requires increased number of components including controlled switches. Due to increased complexity the reliability is expected to be decreasing.

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Development of 50-kW Isolated DC/DC Converter with High-Voltage IGBTs

Cited by 18 publications

References 2 publications

Efficiency Optimization of the High-Power Isolated DC/DC Converters through THD and Losses Reduction in Isolation Transformers

Efficiency Optimization of the High-Power Isolated DC/DC Converters through THD and Losses Reduction in Isolation Transformers

Simplified digital average current mode control algorithm for half- or full-bridge isolated DC/DC converters

On Implementation Possibilities of High-Voltage IGBTs in Resonant Converters

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