[CEATEC] TDK's Noncontact Power Supply Enables Power Transmission at 2 cm Distance

Oct 4, 2007
Hiroki Yomogita, Nikkei Electronics
Barrel-shaped self-propelled robot is noncontact-supplied with power.
Barrel-shaped self-propelled robot is noncontact-supplied with power.
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Power is supplied from the station on the left side.
Power is supplied from the station on the left side.
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Ferrite material
Ferrite material
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Demonstration of the transmission coil and receiving coil
Demonstration of the transmission coil and receiving coil
[Click to enlarge image]

TDK Corporation exhibited ferritic core material used in the noncontact power supply system at CEATEC.

The ferrite material, which is used to manufacture coils for noncontact power supply systems, minimizes the loss and improves power transmission efficiency, according to the company. TDK built and demonstrated a noncontact power supply system adopting the material. It is intended for delivery systems in clean rooms, where handling of power cables is a nuisance, for example.

The demonstrated system incorporates TDK's dye-sensitized solar cell and electric double layer capacitor. The power generated by the solar cell and accumulated in TDK's electric double layer capacitor is supplied to the barrel-shaped robot through the noncontact power supply system. Then the power is supplied to equipment from the moving robot.

The demonstration is aimed at showing technologies in the dye-sensitized solar cell, the electric double layer capacitor and the noncontact power supply system at the same time.

The frequency applied to the coil during noncontact power supply is several tens of kHz, according to the company. The power transmission efficiency between the transmission coil and the receiving coil is explained to be about 50%. The demonstration showed that the power supply is possible even if the transmission coil and the receiving coil are apart from each other roughly by 2 cm.