Novel Core Structure and Iron-loss Modeling for Contactless Power Transfer System of Electric Vehicle

Chigira, Masato; Nagatsuka, Yuichi; Kaneko, Yasuyoshi; Abe, Shigeru; Yasuda, Toru; Suzuki, Akira

doi:10.1541/ieejias.132.9

Cited by 17 publications

(4 citation statements)

References 8 publications

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“…The beating described above appears in i con , and distortion also appears in the v con output on the AC side when a distorted v ast i calculated by Eqs. (1) and (3) is used for carrier comparison, resulting in waveforms that differ in each half interval.…”

Section: Resultsmentioning

confidence: 99%

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Power Flow Control of a Power Conversion Circuit for Contactless Power Transformer Systems with Coil Misalignment

Kitazawa

Kondo

Kashiwagi

2015

Electrical Engineering Japan

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The coupling coefficient between the coils of a noncontact power supply system is reduced by coil misalignment. This reduces the output voltage and the active power in the coils. To cope with these problems, an instantaneous current control method is applied to a single-phase contactless power transformer system in order to apply the equivalent impedance of the PWM rectifier at the load side of the transformer. We propose a control method to supply power constantly to the load even when there is a misalignment in the receiving coils. The limit of the transferred power associated with the proposed control method is investigated. The proposed system, including the control method, is verified by experimental tests over a power range of several tens of watts. C⃝ 2015 Wiley Periodicals, Inc. Electr Eng Jpn, 193(1): 55-64, 2015; Published online in Wiley Online Library (wileyonlinelibrary.com).

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Section: Resultsmentioning

confidence: 99%

“…Given these benefits, they are used to supply power to mobile vehicles. Research on applications to electric vehicles and railway cars has been underway in recent years [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Power Flow Control of a Power Conversion Circuit for Contactless Power Transformer Systems with Coil Misalignment

Kitazawa

Kondo

Kashiwagi

2015

Electrical Engineering Japan

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“…To solve this problem, Auckland University has proposed a new transformer structure compatible with both solenoid type and circular type transformers. By installing a transformer called DDQP and BPP on a receiver, power supply can be realized even if a DD with the same magnetic field structure with a solenoid type transformer or a circular transformer is installed in a transmitter. This has a structure such that magnetic flux from all directions is interlinked using plural stacked circular coils, but some points are unclear on coil exchange, choice of resonant capacitor, etc.…”

Section: Introductionmentioning

confidence: 99%

The Circuit Analysis and Performance Evaluation of an Hc Type Magnetic Coupling Contactless Power Transformer that is Compatible with Both Solenoid and Circular Type Transformers

Yamada

Shimizu

Kobayashi

et al. 2017

Electrical Engineering Japan

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SUMMARYThere are two types of the transformers in a contactless power transfer system: solenoid type (H-shaped) and circular type transformers. These two types of transformers are not compatible because their magnetic field structures are different. An Hc type transformer that is compatible with both transformer types has been proposed. The Hc type receiver adds a central magnetic pole by dividing the winding coil of the H-shaped receiver. The Hc type receiver can change the magnetic field structure by changing the connections of the divided windings and can receive power from both types of transmitters. In this study, we conducted a circuit analysis and evaluated the performance of the Hc type transformer.

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“…As a result, it has the advantages of ease of maintenance and problem‐free operation because problems such as contact failures, current leakage, and shorts do not occur. Applications have already been realized at low power levels in electric toothbrushes and electric shavers, and research on its use in electric vehicles is also being performed . This technology has reached several kilowatts to tens of kilowatts, but in order to extend it further in the future, the establishment of an optimal design method at even higher power and consistent with the applications in question is essential.…”

Section: Introductionmentioning

confidence: 99%

A Method for Designing a High‐Power Contactless Power Transformer Considering Reactive Power

Yamamoto

Maruyama

Kondo

et al. 2015

Elect Comm in Japan

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SUMMARY Problems in high‐power contactless power transmission systems using series and parallel resonance capacitors arise from the maximum voltage limit of the series capacitor due to high reactive power. In this study, the characteristics of the reactive power are analyzed using an equivalent circuit and a contactless power transfer system is designed with the reactive power characteristics taken into consideration. The self‐inductance and the frequency can be used to determine the distribution of reactive power on the primary side and the secondary side. In addition, the optimal winding number, size of the coil, and the appropriate frequency are investigated through electromagnetic field analysis.

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Novel Core Structure and Iron-loss Modeling for Contactless Power Transfer System of Electric Vehicle

Cited by 17 publications

References 8 publications

Power Flow Control of a Power Conversion Circuit for Contactless Power Transformer Systems with Coil Misalignment

Power Flow Control of a Power Conversion Circuit for Contactless Power Transformer Systems with Coil Misalignment

The Circuit Analysis and Performance Evaluation of an Hc Type Magnetic Coupling Contactless Power Transformer that is Compatible with Both Solenoid and Circular Type Transformers

A Method for Designing a High‐Power Contactless Power Transformer Considering Reactive Power

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