A practical approach to inductive power transfer systems for transportation applications using boucherot bridge method

2014 IEEE International Electric Vehicle Conference (IEVC)

Dickson

et al. 2014

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High reliability and cost effectiveness of power electronics components has resulted in very high interest in inductive power transfer techniques among academic and industrial professionals. Since the major interest is directed towards automotive industry for battery charging, a special transformer with a large gap and relatively large leakage inductance is used. In order to achieve desired voltage levels high frequencies in the order of 20 to 100 kHz are preferred, producing high levels of reactive power which if not compensated limits power and efficiency. Thus, there is a need to tune or compensate the significant inductance of the windings. There are four basic transformer tuning topologies reported in literature, each one being a combination of series and/or parallel. This paper presents all four topologies and associated input to output dependences based on a Boucherot Bridge model of a transformer.

Section: Parallel-parallel Methods (Pp)mentioning

confidence: 99%

“…2 [11]. The transformer also has two series inductors and , which introduce the reactive impedance in the primary and the secondary sides.…”

Section: A Transformer Equivalent Circuitmentioning

confidence: 99%

Boucherot Bridge based zero reactive power inductive power transfer topologies with a single phase transformer

2014 IEEE International Electric Vehicle Conference (IEVC)

Dickson

et al. 2014

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“…The evolution of two coupled inductors with a mutual inductance M, a transformer, into a current source is shown in Figure 5 and also in [10]. The transformer differs from the current source of Figure 4(a) by having the additional two inductors ‫ܮ‬ ଵ and ‫ܮ‬ ଶ , which introduce the reactive impedance in the primary and a the secondary sides.…”

Section: Wpt Transformer -A Current Sourcementioning

confidence: 99%

Effects of parallel load-side compensation in wireless power transfer

2015 IEEE Electrical Power and Energy Conference (EPEC)

Dickson

et al. 2015

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High reliability and ever increasing cost-effectiveness of power electronics components and digital processors have resulted in high interests in inductive power transfer techniques. The interest is directed mostly at electric and hybrid passenger car battery charging, although the first solutions have already been conceptualized and turned into homologated products for much higher power levels for bus and light rail vehicles. Transformers used for automotive applications have a large air gap and relatively low coupling coefficients. High levels of output power require tuning techniques in order to eliminate or decrease the associated reactive power. In this paper a parallel load side compensation technique and its consequences are described. The analysis is done by utilizing a novel method based on Boucherot Bridge model for the wireless power transformer. The analytical results are confirmed by circuit simulation using the transformer parameters derived from finite element electromagnetic analysis.

“…Recently, emerging technologies such as electric and hybrid vehicles demand high power density converters with improved efficiencies [2][3][4][5]. Also the trend of introducing wireless power transfer for static and dynamic energy exchange with vehicles has revived the attention to resonant converters [6][7][8][9]. SRC has multiple advantages: intrinsic low switching losses (allowing high frequency operation and higher power density), taking advantage of inevitable parasitic inductances as a part of resonant tank, lower EMI levels, a single-capacitor output filer, flat efficiency versus load power, and intrinsic short circuit protection.…”

Section: Introductionmentioning

confidence: 99%

A line and load independent constant-frequency zero-voltage-switching series resonant converter

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

Jain

et al. 2014

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Frequency modulation is often used in series resonant converters to gain output voltage regulation. Variable frequency however brings challenges for EMI filter and switch driver design and the desirable zero voltage switching cannot be maintained at light load conditions. This paper presents timedomain steady-state analysis of fixed-frequency series resonant converters with phase shift modulation. Three operation modes are identified and the mode boundaries are demonstrated. Based on this a passive robust auxiliary circuit is proposed to ensure the zero voltage switching of the converter in all three modes. The achievement of zero voltage switching is confirmed by experimental results.