A contactless charger with LLC tank and microcontroller

Yang, Yueh-Ru

doi:10.1109/iecon.2009.5415378

Cited by 8 publications

(5 citation statements)

References 2 publications

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“…4. The availability of the LLC converter has been reported and this topology has been already applied for the wireless power transfer [17], [18]. The ZVS of transistors and the ZCS of diodes achieve high efficiency.…”

Section: A Circuit Configuration and Parameter Designmentioning

confidence: 99%

Contactless DC Connector Based on GaN LLC Converter for Next-Generation Data Centers

Hayashi

Toyoda

Ise

et al. 2015

IEEE Trans. on Ind. Applicat.

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An inductively coupled contactless dc connector has been proposed for the next-generation 380-V dc distribution system in data centers. A LLC resonant dc-dc converter topology with gallium nitride (GaN) power transistors has been applied to realize the short-distance highly efficient contactless power transfer. A prototype of a 1.2-kW 384-to 192-V connector has been fabricated and the conversion efficiency of over 95% with the power density of 8.1 W/cm 3 has been confirmed experimentally under 1000-kHz operation. The design consideration has been carried out and the potential to achieve 10.0 W/cm 3 has been also shown taking the feature of the GaN power device and the characteristics of the magnetic core material for the transformer into account. The contactless dc connector integrates the functioning of an isolated dc-dc converter into a connector for space saving, and the dc current can be cut off without arc because of the inductive coupling. The proposed connector contributes to realizing a highly efficient, space saving, and reliable future 380-V dc distribution system. Index Terms-Contactless power supply, dc power distribution, dc-dc power converters, gallium nitride (GaN).0093-9994 , he has been with Osaka University.He is engaged in research and development of power converter control in distribution systems and the design methodology for high power density converter using SiC and GaN power devices. Currently, he is mainly engaged in the development of high power density dc power supplies for 380-V dc distribution systems. His research concerns dc power connectors using LLC resonant circuits.Toshifumi Ise was born in 1957. He received the B.Eng., M. Eng., and Doctor of Engineering degrees in electrical engineering

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Section: A Circuit Configuration and Parameter Designmentioning

confidence: 99%

Contactless DC Connector Based on GaN LLC Converter for Next-Generation Data Centers

Hayashi

Toyoda

Ise

et al. 2015

IEEE Trans. on Ind. Applicat.

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“…The circuit configuration of the L LLC converter has been reporte [10] [11]. The zero voltage swit diodes achieve high efficiency.…”

Section: Circuit Configuration Bamentioning

confidence: 99%

Contactless DC connector based on ISOP-IPOS topology for high power density 380 V DC power feeding system

Hayashi

Toyoda

Ise

et al. 2014

2014 16th European Conference on Power Electronics and Applications

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Contactless DC connector has been proposed for high power density 380 V DC power feeding system. A LLC resonant DC-DC converter topology with GaN power transistors and Si-SBDs has been applied to realize high frequency and high efficiency inductively-coupled contactless DC connector. ISOP (input series and output parallel)-IPOS (input parallel and output series) connection topology has been also employed to develop 380 V DC connector. Prototype of a 1.2 kW 384 V-192 V DC connector to constitute a part of 384 V-384 V connector has been fabricated, and maximum efficiency of 96.5% with the ideal power density of 5.4 W/cm 3 has been confirmed experimentally under 500 kHz operation. Design consideration for the proposed connector has been also conducted, and the approach for achieving higher power density of 10 W/cm 3 has been presented.

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“…In the secondary of r T , the voltage doubler and magnetron can be roughly integrated as a resistive load because the capacitance of 1 C and 2 C are small and the secondary leakage inductance limits the current of magnetron. While all circuit parameters are transferred to the primary of the transformer [13], the transition-mode ZVS inverter can be redrawn as a simplified circuit shown in Fig. 5, where the pulsating DC input voltage d V is regarded as a constant in a switching cycle.…”

Section: Circuit Analysismentioning

confidence: 99%

“…Moreover, ancillary circuits can be added in the inverter [2]. At present, many candidate circuits can be selected for magnetron drive [1][2][3][4][5][6][7][8][9][10][11][12][13]. However, for AC110V microwave ovens, due to simplicity and low cost, the voltagefed quasi-E resonant inverters were widely used [1].…”

Section: Introductionmentioning

confidence: 99%

A magnetron power supply with transition-mode ZVS inverter

Yang

2013

2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS)

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This paper designs a transition-mode zero-voltageswitching inverter for cooker magnetrons. The inverter drives a leakage transformer to generate high voltage and stabilize current. While switch is ON, pulsating input voltage magnetizes the transformer. And, while switch is OFF, the transformer resonates with a parallel capacitor. For achieving zero-voltage switching, a transition-mode driver L6561 is utilized to detect the ending of resonance and drives an insulated-gate-bipolar transistor. The ON time of transistor is controlled to regulate the magnetron power and is set to be inversely proportional to the input voltage. To demonstrate the analyses and designs of this paper, a 1kW ZVS inverter is implemented.I.

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A contactless charger with LLC tank and microcontroller

Cited by 8 publications

References 2 publications

Contactless DC Connector Based on GaN LLC Converter for Next-Generation Data Centers

Contactless DC Connector Based on GaN LLC Converter for Next-Generation Data Centers

Contactless DC connector based on ISOP-IPOS topology for high power density 380 V DC power feeding system

A magnetron power supply with transition-mode ZVS inverter

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