CURRENT/VOLTAGE DETECTION PRINTED BOARD AND CURRENT/VOLTAGE DETECTOR

• US 20090058398A1
• Filed: 08/29/2008
• Published: 03/05/2009
• Est. Priority Date: 08/31/2007
• Status: Active Grant

• Current Assignee: Daihen Corporation
• Original Assignee: Daihen Corporation
• Inventors: IBUKI, Yoshifumi
• Granted Patent: US 8,179,122 B2
• Time in Patent Office: Days
• US Class Current: 324/126
• CPC Class Codes: G01R 15/181 using coils without a magnetic core, e.g. Rogowski coils

Abstract

A printed board, includes: a first shield portion, configured to reduce an influence of an electric field in combination with a casing accommodating the printed board, at least a part of the first shield portion being formed with a plurality of through holes; and a second shield portion, configured to reduce the influence of the electric field in combination with the casing, at least a part of the second shield portion being formed with a plurality of through holes, wherein the second shield portion is arranged alongside of the first shield portion.

Claims

1. A printed board, comprising:

a first shield portion, configured to reduce an influence of an electric field in combination with a casing accommodating the printed board, at least a part of the first shield portion being formed with a plurality of through holes; and

a second shield portion, configured to reduce the influence of the electric field in combination with the casing, at least a part of the second shield portion being formed with a plurality of through holes, wherein

the second shield portion is arranged alongside of the first shield portion.

2. The printed board according to claim 1, wherein

each of the first shield portion and the second shield portion includes an unshielded portion.

3. The printed board according to claim 1, wherein

no unshielded portion is provided with respect to the first shield portion and the second shield portion.

4. A printed board, configured to detect an AC current flowing in a power transmission conductor and an AC voltage generated in the power transmission conductor, the power transmission conductor being used as an AC power transmission path, the printed board comprising:

a first wire, configured to detect the AC voltage;

a shield portion, configured to reduce an influence of an electric field of the AC current in combination with a casing accommodating the printed board, at least a part of the shield portion being formed with a plurality of through holes; and

a second wire, configured to detect the AC current, wherein;

the printed board is formed with a penetration hole;

the first wire is provided between the penetration hole and the shield portion; and

the shield portion is provided between the first wire and the second wire.

5. The printed board according to claim 4, wherein

the through holes are arranged in a substantially circular shape.

6. The printed board according to claim 4, wherein

the through holes are arranged in a substantially circular shape and in at least two lines.

7. A detector, configured to detect an AC current flowing in a power transmission conductor and an AC voltage generated in the power transmission conductor, the power transmission conductor being used as an AC power transmission path, the detector comprising:

a casing; and

a printed board comprising;

a first wire, configured to detect the AC voltage;

a shield portion, configured to reduce an influence of an electric field of the AC current in combination with the casing accommodating the printed board, at least a part of the shield portion being formed with a plurality of through holes; and

a second wire, configured to detect the AC current,

wherein;

the printed board is formed with a penetration hole;

the first wire is provided between the penetration hole and the shield portion;

the shield portion is provided between the first wire and the second wire; and

the casing covers the printed board excluding the penetration hole.

8. The detector according to claim 7, wherein

the through holes are arranged in a substantially circular shape.

9. The detector according to claim 7, wherein

the through holes are arranged in a substantially circular shape and in at least two lines.

10. The detector according to claim 7, wherein

the shield portion includes an unshielded portion where the influence of the electric field is not reduced.

11. The detector according to claim 10, wherein

the unshielded portion is provided between a first surface and a second surface of the printed board.

12. The detector according to claim 10, wherein

the unshielded portion is provided between the printed board and the casing.

13. The detector according to claim 7, wherein

the casing includes:

a main body, configured to fix the print board; and

a cover portion, configured to accommodate the print board.

14. The detector according to claim 7, wherein

the print board includes a plurality of layers laminated each other;

the first wire is formed with a plurality of through holes arranged at the periphery of the penetration hole, the through holes penetrating between at least a part of the layers; and

the first wire includes a pattern wire connecting the through holes.

15. The detector according to claim 7, wherein

the AC current has a frequency of a radio frequency band.