# US 2019/0356246 A1 · Vibration powered generator

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- Number: US 2019/0356246 A1
- Document ID: US20190356246A1
- Status: Published application
- Kind: A1
- Application number: 16/474,122
- Filed: 2017-12-20
- Published: 2019-11-21
- Earliest claimed: 2016-12-27
- Assignees: Tohoku Steel Co., Ltd.
- Applicants: TOHOKU STEEL Co., Ltd.
- Inventors: Ryuichi ONODERA; Tsuyoki TAYAMA; Takenobu SATO; Takashi EBATA; Fumio NARITA
- Web page: https://patentgrep.com/patent/US20190356246A1

## CPC

- H02N 2/188: {adapted for resonant operation}
- G01R 33/18: Measuring magnetostrictive properties
- H10N 35/101: {with mechanical input and electrical output, e.g. generators, sensors}
- H02N: ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR

## Abstract

A vibration powered generator capable of vibrating at a plurality of resonance frequencies to generate electric power with a simpler structure is provided. A vibration powered generator has an elongated magnetostrictive material having one end attached to a vibrating body, in which the magnetostrictive material vibrates due to vibration of the vibrating body whereby the vibration powered generator generates electric power with the aid of an inverse magnetostrictive effect of the magnetostrictive material. A cross-sectional shape vertical to a longitudinal direction of the magnetostrictive material has an asymmetrical shape with respect to a straight line extending along a vibration direction thereof due to vibration of the vibrating body.

## Claims

### Claim 1

A vibration powered generator having an elongated magnetostrictive material having one end attached to a vibrating body, in which the magnetostrictive material vibrates due to vibration of the vibrating body whereby the vibration powered generator generates electric power with the aid of an inverse magnetostrictive effect of the magnetostrictive material, wherein
a cross-sectional shape vertical to a longitudinal direction of the magnetostrictive material has an asymmetrical shape with respect to a straight line extending along a vibration direction thereof due to vibration of the vibrating body.

### Claim 2 (depends on 1)

The vibration powered generator according to claim 1, wherein the magnetostrictive material is configured to rotate about an axis extending along the longitudinal direction in a state of being attached to the vibrating body.

### Claim 3 (depends on 1)

The vibration powered generator according to claim 1, wherein
the magnetostrictive material has a cross-sectional shape vertical to the longitudinal direction such that a largest width and a largest thickness are different, and a largest width direction and a largest thickness direction are inclined with respect to the vibration direction.

### Claim 4 (depends on 3)

The vibration powered generator according to claim 3, wherein an angle between the largest width direction and/or the largest thickness direction and the vibration direction can be changed in a state in which the magnetostrictive material is attached to the vibrating body.

### Claim 5 (depends on 3)

The vibration powered generator according to claim 3, wherein
a ratio of the largest width of the magnetostrictive material to the largest thickness can be changed in a state in which the magnetostrictive material is attached to the vibrating body.

### Claim 6 (depends on 3)

The vibration powered generator according to claim 3, wherein
when the largest width of the magnetostrictive material is b and the largest thickness is h, a value of b/h is between 2.5 and 5.0.

### Claim 7 (depends on 1)

The vibration powered generator according to claim 1, wherein
the magnetostrictive material has a shape in which the cross-sectional shape changes along the longitudinal direction.

### Claim 8 (depends on 1)

The vibration powered generator according to claim 1, wherein
the magnetostrictive material is formed of a Fe—Co-based alloy.

### Claim 9 (depends on 1)

The vibration powered generator according to claim 1, wherein
a composite material obtained by bonding a magnetostrictive material and a soft magnetic material is used instead of the magnetostrictive material.