Vibration power generator

Patent metadata

Field	Value
Publication number	US-9787162-B2
Application number	US-201214397763-A
Country	US
Kind code	B2
Filing date	May 2, 2012
Priority date	May 2, 2012
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

The vibration power generator includes: a plurality of permanent magnets ( 1, 2 ) 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 ( 3, 4 ) 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.

First claim

The invention claimed is:

1. A vibration power generator, comprising:
a plurality of permanent magnets integrated together to have given inter-permanent magnet gaps under a state in which the same poles of the plurality of 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,
the vibration power generator being configured to generate an electric power through relative movement of the plurality of permanent magnets and the plurality of coils,
wherein, of the plurality of coils, the coil opposed to each of the plurality of permanent magnets comprises divided coils that are divided into N pieces, where N is equal to or greater than 2, so as to have a given inter-coil gap between the coils, and
wherein a relationship between a length of the divided coils opposed to each other and a length of the permanent magnet is set so that the length of the divided coils is equal to or more than 1/N of the length of the permanent magnet and equal to or less than 1/N of a sum of the length of the permanent magnet and a length of the inter-permanent magnet gap.

2. A vibration power generator according to claim 1 ,
including a spring, wherein the plurality of permanent magnets can be subjected to vibration from the spring, to generate an electric power, and
wherein one end of each of two coils among the N divided coils opposed to each of the plurality of permanent magnets is located on an outer periphery of an end portion of each of the plurality of permanent magnets or at a position of the inter-permanent magnet gap in a stationary state.

3. A vibration power generator according to claim 1 , further comprising a material having a relative permeability of more than 1 inserted between the plurality of permanent magnets and at end portions of the plurality of permanent magnets.

4. A vibration power generator according to claim 1 ,
wherein the N divided coils are each connected in series to the N divided coils arranged on the outer peripheries of adjacent ones of the plurality of permanent magnets, and
wherein the vibration power generator further comprises N rectifier circuits for inputting a coil output.

Assignees

• Nomura Hiromori
• Onishi Ken
• Bando Masataka
• Mitsubishi Electric Eng

Inventors

• Nomura Hiromori
• Onishi Ken
• Bando Masataka

Classifications

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K35/02 Primary

  with moving magnets and stationary coil systems · CPC title

• H02K16/00

  Machines with more than one rotor or stator {(machines for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts H02K51/00; permanent magnet machines with multiple rotors or stators relatively rotated for vectorially combining the excitation fields or the armature voltages H02K21/029)} · CPC title

• H02P9/00

  Arrangements for controlling electric generators for the purpose of obtaining a desired output · CPC title

• H02K7/1876 Primary

  with reciprocating, linearly oscillating or vibrating parts · CPC title