# US 12,191,063 B2 · Reactor

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- Number: US 12,191,063 B2
- Document ID: US12191063B2
- Status: Granted
- Kind: B2
- Application number: 17/538,364
- Filed: 2021-11-30
- Published: 2022-03-24
- Granted: 2025-01-07
- Earliest claimed: 2019-06-03
- Assignees: Alps Alpine Co., Ltd.
- Applicants: Alps Alpine Co., Ltd.
- Inventors: Yoshiaki Nozaki; Yasuhiro Ikarashi; Mitsuo Aratono
- Web page: https://patentgrep.com/patent/US12191063B2

## CPC

- H01F 17/062: {Toroidal core with turns of coil around it}
- H01F 27/2895: {Windings disposed upon ring cores}
- G01R 19/0092: {Measuring current only}
- G01R 33/09: Magnetoresistive devices
- G01R 33/098: {comprising tunnel junctions, e.g. tunnel magnetoresistance sensors}
- G01R 33/10: Plotting field distribution {; Measuring field distribution}
- H01F 27/06: Mounting, supporting, or suspending transformers, reactors, or choke coils {not being of the signal type}
- H01F 27/29: Terminals; Tapping arrangements {for signal inductances}
- H01F 27/292: {Surface mounted devices}
- H01F 27/402: {Association of measuring or protective means}
- G01R 33/0011: {comprising means, e.g. flux concentrators, flux guides, for guiding or concentrating the magnetic flux, e.g. to the magnetic sensor}
- G01R 33/0206: {Three-component magnetometers}
- H01F 27/065: {Mounting on printed circuit boards}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)

## Abstract

A reactor includes a toroidal coil including a winding wound to have an annular outer shape, a bus bar electrically connected to one end of the winding, and a current sensor that measures electric current flowing through the bus bar. The bus bar includes a crossing passing through a central area including an area inside an internal surface of the annular outer shape and an area in which the area extends along a central axis of the annular outer shape, and the current sensor measures electric current flowing through the crossing.

## Claims

### Claim 1

A reactor comprising:
a toroidal coil including a winding wound to have an annular shape;
a bus bar electrically connected to one end of the winding; and
a current sensor that measures electric current flowing through the bus bar,
wherein the bus bar includes a crossing passing through a central area, wherein the central area includes an area inside an internal surface of the annular shape and that extends along a central axis of the annular shape, and
wherein the current sensor measures electric current flowing through the crossing.

### Claim 2 (depends on 1)

The reactor according to claim 1, wherein the current sensor includes a magnetism detecting element that measures an induction field created by the electric current flowing through the crossing.

### Claim 3 (depends on 2)

The reactor according to claim 2, wherein the magnetism detecting element comprises a magnetoresistive sensor.

### Claim 4 (depends on 1)

The reactor according to claim 1, wherein the toroidal coil further includes a toroidal core around which the winding winds.

### Claim 5 (depends on 1)

The reactor according to claim 1, further comprising an insulative base that fixes the toroidal coil and the bus bar together.

### Claim 6 (depends on 5)

The reactor according to claim 5, wherein the base comprises a molding that integrates the toroidal coil with the bus bar.

### Claim 7 (depends on 5)

The reactor according to claim 5,
wherein the current sensor is embedded in the base, and
wherein part of a surface of the base has electrical conductivity.