Mitsubishi Electric Engineering Company, Limited

Hiromori Nomura

Ken Onishi

Yujiro Shirahata

Masataka Bando

Keiji Shibata

The vibration power generator includes: a plurality of permanent magnets () integrated together to have given inter-magnet gaps under a state in which the same poles of the permanent magnets are opposed to each other; and a plurality of coils () arranged on respective outer peripheries of the plurality of permanent magnets so as to have a distance from the plurality of permanent magnets, and is configured to generate an electric power through relative movement of the plurality of permanent magnets and the plurality of coils. A relationship between a length of the opposed coils and a length of the permanent magnet is set so that the length of the coils is larger than the length of the permanent magnet and equal to or smaller than a sum of the length of the permanent magnet and a length of the inter-magnet gap.

Vibration power generator

A DC-DC converteraccumulates power generated by a power source in a power storage element, converts power from an input into a predetermined voltage to supply the predetermined voltage to a load connected to an output, and is activated to start power feeding when an input voltage exceeds Vd. A power source control sectionis connected to the output of the converterto obtain power to operate, and controls the power supply to the load while changing an operation mode according to the power source energy. The sectionis activated by the start of the power supply by the converter to operate in a low power-consumption mode with only the detected power source energy monitor, and starts the power supply to the load when the energy exceeds a level in which the input voltage becomes equal to Vdhigher than Vd

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Tokyo, Japan

Hiromori Nomura