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Tokyo, Japan

Patent
Saitama University and Technova | Date: 2012-02-07

According to one embodiment, contactless power transfer apparatus includes: transmission coil; primary capacitor; reception coil opposing transmission coil through gap; and secondary capacitor. Specification of frequency of the transmission coil and that of the reception coil are equal. At least one of electrical power specification and gap length specification of the transmission coil differ from the reception coil. When the electrical power specification of the power transmission coil differ from that of the power reception coil, the power is supplied from the transmission coil to the reception coil by using smaller one of the power of the transmission coil and of the reception coil as maximum power. When the gap length specification of the transmission coil differs from that of the reception coil, the transmission coil opposes the reception coil through the gap length, which is the specification of the transmission coil.


Patent
Saitama University and Technova | Date: 2012-02-20

Provided is a contactless power transfer device for a moving object. Each of a power transmission coil and a power receiving coil comprises an H-shaped core, and first, second and third search coils are installed on a magnetic pole object of the H-shaped core of the power transmission coil. A y-direction positional deviation between the power transmission coil and the power receiving coil is detected using voltages measured at the first and second search coils, and an x-direction positional deviation is detected using voltages measured at the third search coils.


Patent
Saitama University and Technova | Date: 2012-01-18

A half-bridge inverter is used for a high frequency alternating current power supply to be connected to a primary side of a contactless power transformer, and a voltage-doubler rectifier is used to convert a secondary-side alternating current output of the contactless power transformer into a direct current.


Patent
Technova | Date: 2012-09-07

In an example of a system, power is transferred from a transmission coil to a reception coil by electromagnetic induction. A detecting unit calculates a difference between a standard value and a measured value, detects presence of a metallic foreign object on the transmission coil based on the difference, and outputs a signal when the metallic foreign object is detected. The standard value is obtained by supplying electrical power to the transmission coil when a metallic foreign object is absent on the transmission coil. The measured value is obtained by supplying electrical power to the transmission coil. If P


Patent
Technova | Date: 2013-05-21

A contactless power transfer transformer includes main body. The main body includes magnetic pole core members, winding wire core member, and wire. The winding wire core member is orthogonal to the magnetic pole core members and connects one portion of each of the pair of parallel magnetic pole core members with each other. The main body is fixed to fixing plate having a magnetic shield function and heat dissipation function. The connecting position of the winding wire core member with respect to the magnetic pole core members is located toward one side from a center in the longitudinal direction of the magnetic pole core members. At least a space between the pair of the magnetic coil core members each containing an end portion longer in distance to the connecting position is used as an arrangement space of component electrically connected to the electric wire.

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