Design Principles of a Symmetrically Coupled Inductor Structure for Multiphase Synchronous Buck Converters

Nagaraja, Haikady N.; Kastha, Debaprasad; Petra, A

doi:10.1109/tie.2010.2048830

Cited by 74 publications

(22 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…To reduce the volume and to increase the efficiency of interleaved converters, CIs can be implemented [23]- [29]. A realization of a CI arrangement and the respective magnetic equivalent circuit is shown in Fig.…”

Section: Implementing a Nonideal CImentioning

confidence: 99%

General Analysis and Design Guideline for a Battery Buffer System With DC/DC Converter and EDLC for Electric Vehicles and its Influence on Efficiency

Schroeder¹,

Fuchs

2015

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

In this paper, the general design of a battery buffer system (BBS) consisting of a dc/dc converter and electric double layer capacitors for an electric vehicle is presented. This is intended to save the regenerative braking energy and to support the battery during acceleration. The design of a multiphase converter in interleaved operation with nonideal coupled inductors is stated to minimize volume and power losses while maintaining given current ripple limitations. A reduced sensor current-sharing control method is developed and its correct choice of the sensor position is explained. The peak efficiency of the designed and built converter can be measured to nearly 99%. The corresponding BBS is implemented in a lead-acid battery powered electric lift truck propulsion system. The system operation with and without the BBS is compared to examine the behavior and the overall efficiency. It can be shown that the traction battery stress can be strictly reduced as well as the temperature rise in the battery. Furthermore, the efficiency can be increased in the range of 5-6%. The battery's lifetime improvement is estimated by means of the difference in the temperature rise to approximately 20%.Index Terms-Battery efficiency, dc-dc converter, electric double layer capacitor (EDLC), electric vehicle, interleaved, power electronics.

show abstract

Section: Implementing a Nonideal CImentioning

confidence: 99%

General Analysis and Design Guideline for a Battery Buffer System With DC/DC Converter and EDLC for Electric Vehicles and its Influence on Efficiency

Schroeder¹,

Fuchs

2015

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

show abstract

“…For the TPI and the PMTPI, the differences between R c , R g , R g1 , and R PM values are determined by μ r of the material according to equation (1). μ r of air is ~1, μ r of 3C20 ferrite (which is used in fabricated TPI and PMTPI in this paper) is ~5500 [25], μ r of NdFeB magnet (which is used in PMTPI) is ~1.05 [26].…”

Section: Operation Principle Of the Pmtpimentioning

confidence: 99%

“…Power inductor is one of the critical components in switching power converters such as buck converter, boost converter and buck-boost converter [1][2][3][4][5][6][7][8][9][10][11]. A power inductor is usually made up of one or more conductor windings (e.g.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of High-Current Toroid Power Inductor With NdFeB Magnet for DC–DC Power Converters

Dang

Qahouq

2015

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

This paper presents an experimental evaluation of a high current toroid power inductor (TPI) with NdFeB permanent magnet (PMTPI). By adding a small piece of fabricated NdFeB-N35EH magnet (magnet volume is ~0.36% of the PMTPI ferrite core volume) in the air gap of the TPI, the saturation current of the PMTPI is doubled with the same size and inductance value. The desired dimensions of the NdFeB-N35EH PM are calculated before fabrication and then the fabricated PM is characterized. The ~6.8 μH PMTPI is tested in a 5V to 2V buck power converter. Results show that compared to a TPI with the same size and inductance (~6.8μH) without the PM, the saturation current of the PMTPI is doubled (from 7A to 14A). Compared to another TPI with a larger size needed to double the saturation current, the ferrite core weight of the PMTPI is reduced to 53.6% and the core volume is reduced to 59.2%. Experimental results also show that the addition of the NdFeB-N35EH PM does not introduce additional power losses and increase of temperature for the PMTPI and does not affect the power converter efficiency.

show abstract

“…Generally, when DC-DC converters are connected in parallel, the interleaving method is employed to reduce the output current ripples of inductors [14]- [17]. The ripple reduction of output current due to interleaving effect is represented as…”

Section: B Reduction Of Current Ripple In Coupled Inductormentioning

confidence: 99%

1.5MVA grid-connected interleaved inverters using coupled inductors for wind power generation system

Shin

Lee

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

View full text Add to dashboard Cite

In this paper, grid-connected interleaved voltage source inverters for PMSG wind power generation system with coupled inductors is introduced. In parallel operation, the undesirable circulating current flows between inverters. There are some differences in circulating currents according to source configuration. It is mathematically analyzed and simulated for the verification of analysis. In case of interleaved inverters, the uncontrollable circulating current in switching frequency level flows between inverter modules regardless of source configuration such as common or separated if filter inductance which is placed between inverters is significantly low. In order to suppress high frequency circulating current, the coupled inductors are employed in each phase. A case of 1.5MVA grid-connected interleaved inverters using coupled inductors prototype for the PMSG wind power generation Back To Back converters in parallel are introduced and experimentally verified the proposed topology.

show abstract

Design Principles of a Symmetrically Coupled Inductor Structure for Multiphase Synchronous Buck Converters

Cited by 74 publications

References 8 publications

General Analysis and Design Guideline for a Battery Buffer System With DC/DC Converter and EDLC for Electric Vehicles and its Influence on Efficiency

General Analysis and Design Guideline for a Battery Buffer System With DC/DC Converter and EDLC for Electric Vehicles and its Influence on Efficiency

Evaluation of High-Current Toroid Power Inductor With NdFeB Magnet for DC–DC Power Converters

1.5MVA grid-connected interleaved inverters using coupled inductors for wind power generation system

Contact Info

Product

Resources

About