A New He Core Transmitter of a Contactless Power Transfer System that is Compatible with Circular Core Receivers and H-shaped Core Receivers

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A New He Core Transmitter of a Contactless Power Transfer System that is Compatible with Circular Core Receivers and H-shaped Core Receivers

Shimizu, Ryotaro / Kaneko, Yasuyoshi / Abe, Shigeru

Contactless power transfer systems for electric vehicles contain two types of transformers (a pair consisting of a transmitter and a receiver): a rectangular (H-shaped) core double-sided winding transformer and a circular core single-sided winding transformer. Since the magnetic field structures of these two transformers differ greatly, these two types of transformers have been incompatible in the past, although a number of compatible receivers have recently been proposed. This paper proposes a novel He core transmitter that is compatible with both types of receivers. The He core transmitter adds a central magnetic pole by dividing the winding coil of the H-shaped core transmitter. This transmitter can change the magnetic field structure by changing the connections of divided windings and can transfer power to both types of receivers. Compatibility tests at 3 kW are carried out, and the test results are presented.