CURRENT DETECTION PRINTED BOARD, VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTION PRINTED BOARD, CURRENT/VOLTAGE DETECTOR, CURRENT DETECTOR AND VOLTAGE DETECTOR

• US 20070285089A1
• Filed: 03/19/2007
• Published: 12/13/2007
• Est. Priority Date: 03/31/2006
• Status: Abandoned Application

• Current Assignee: Daihen Corporation
• Original Assignee: Daihen Corporation
• Inventors: Ibuki, Yoshifumi, Omae, Shuji, Ito, Hideo
• Application Number:
  US11/687,973
• Publication Number:
  US 20070285089A1
• Time in Patent Office: Days
• US Class Current: 324/260
• CPC Class Codes: G01R 15/142 Arrangements for simultaneous measurements of several parameters employing techniques covered by groups G01R15/14 - G01R15/26
• CPC Class Codes: G01R 15/18 using inductive devices, e.g. transformers
• CPC Class Codes: G01R 15/181 using coils without a magnetic core, e.g. Rogowski coils

Abstract

A current detection printed board includes: a board having a penetration hole that penetrates the board; and at least one wire that is formed in a coiled shape having both ends by penetrating the board along the periphery of the penetration hole and alternately connecting a front surface layer and a rear surface layer of the board, wherein, when a conductor, in which an AC current flows, is disposed to pass through the inside of the penetration hole, a current flowing in the wire is output through electromagnetic induction.

Claims

1. A current detection printed board comprising:

a board having a cutout; and

at least one wire that is formed in a coiled shape having both ends by penetrating the board along the periphery of the cutout and alternately connecting a front surface layer and a rear surface layer of the board,

wherein, when a conductor, in which an AC current flows, is disposed adjacent to the cutout, a current flowing in the wire through electromagnetic induction is output.

2. The current detection printed board according to claim 1,

wherein the wire includes:

through holes formed at the penetrating portion of the board; and

pattern wires formed on the front surface layer and the rear surface layer.

3. The current detection printed board according to claim 1,

wherein, when a plurality of the wires are formed on the board, both ends or electrically identical portions of each wire are electrically connectable to both ends or electrically identical positions of another wire.

4. A current detection printed board comprising:

a board having a cutout; and

at least one wire that is formed in a coiled shape and has both ends by penetrating between a top conductive layer and a bottom conductive layer of the board along the periphery of the cutout and alternately connecting the top conductive layer and the bottom conductive layer of the board, and/or

at least one wire that is formed in a coiled shape and has both ends by penetrating a part of layers of the board along the periphery of the cutout and alternately connecting a top conductive layer and a bottom conductive layer of the penetrating portion,

wherein, when a conductor, in which an AC current flows, is disposed adjacent to the cutout, a current flowing in the wire through electromagnetic induction is output.

5. The current detection printed board according to claim 4,

wherein the wire includes:

through holes formed at the penetrating portion penetrating between the top conductive layer and the bottom conductive layer of the board or the part of layers of the board; and

pattern wires formed on the top conductive layer and the bottom conductive layer of the penetrating portion.

6. The current detection printed board according to claim 4,

wherein, when a plurality of the wires are formed on the board, both ends or electrically identical portions of each wire are electrically connectable to both ends or electrically identical positions of another wire.

7. The current detection printed board according to claim 4,

wherein the cutout has a substantially semicircular shape.

8. The current detection printed board according to claim 4,

wherein the AC current is an AC current having a frequency of a radio frequency band.

9. A voltage detection printed board comprising:

a board having a cutout; and

a wire that is formed along the periphery of the cutout,

wherein, when a conductor, in which an AC voltage is generated, is disposed adjacent to the cutout, the wire functions as an electrode of a capacitor by making a pair with a portion of the conductor facing the wire.

10. The voltage detection printed board according to claim 9,

wherein the wire includes:

along the periphery of the cutout, a plurality of through holes penetrating the board; and

pattern wires formed on a front surface layer and a rear surface layer of the board so as to connect the through holes.

11. The voltage detection printed board according to claim 9,

wherein the wire includes:

along the periphery of the cutout, a plurality of through holes penetrating between the top conductive layer and the bottom conductive layer of the board or a part of layers of the board; and

a pattern wire formed on at least one layer between the top conductive layer and the bottom conductive layer of the penetrating portion so as to connect the through holes.

12. The voltage detection printed board according to claim 9,

wherein the through holes have a substantially semicircular shape.

13. The voltage detection printed board according to claim 9,

wherein the AC voltage is an AC voltage having a frequency of a radio frequency band.

14. A current/voltage detection printed board comprising:

a penetration hole that penetrates the board;

at least one first wire that is formed in a coiled shape and has both ends by penetrating the board along the periphery of a substantially half of the penetration hole and alternately connecting a top conductive layer and a bottom conductive layer of the board, and/or

at least one wire that is formed in a coiled shape and has both ends by penetrating a part of layers of the board along the periphery of the substantially half of the penetration hole and alternately connecting a top conductive layer and a bottom conductive layer of the penetrating portion;

a second wire for output that is connected to all or a part of both ends of the first wire;

a current detection portion that functions to output a current flowing in the first wire through electromagnetic induction when the power transmission conductor, in which an AC current flows, is disposed to pass through the penetration hole;

a third wire that is formed along the periphery of another substantially half of the penetration hole;

a fourth wire for output that is connected to a part of the third wire; and

a voltage detection portion that functions to output a voltage generated in the third wire from the fourth wire when the power transmission conductor, in which an AC voltage is generated, is disposed to pass through the penetration hole, and the third wire makes a pair with a portion of the power transmission conductor facing the third wire and functions as an electrode of a capacitor.

15. The current/voltage detection printed board according to claim 14,

wherein the first wire includes:

through holes formed at the penetrating portion penetrating between the top conductive layer and the bottom conductive layer of the board or the part of layers of the board; and

pattern wires formed on the top conductive layer and the bottom conductive layer of the penetrating portion.

16. The current/voltage detection printed board according to claim 14,

wherein the third wire includes:

along the periphery of the penetration hole, a plurality of through holes penetrating between the top conductive layer and the bottom conductive layer of the board or a part of layers of the board; and

a pattern wire formed on at least one layer between the top conductive layer and the bottom conductive layer of the penetrating portion so as to connect the through holes.

17. The current/voltage detection printed board according to claim 14,

wherein, when a plurality of the first wires are formed on the board, both ends or electrically identical portions of each wire are electrically connectable to both ends or electrically identical positions of another wire.

18. A current/voltage detector that detects an AC current flowing in a power transmission conductor to be used as an AC power transmission path and an AC voltage generated in the power transmission conductor, the current/voltage detector comprising:

a current detection printed board having a first cutout, and including;

at least one first wire that is formed in a coiled shape and has both ends by penetrating between a top conductive layer and a bottom conductive layer of the board along the periphery of the first cutout and alternately connecting the top conductive layer and the bottom conductive layer of the board, and/or

at least one wire that is formed in a coiled shape and has both ends by penetrating a part of layers of the board along the periphery of the first cutout and alternately connecting a top conductive layer and a bottom conductive layer of the penetrating portion, and

a second wire for output that is connected to all or a part of both ends of the first wire,

wherein when the power transmission conductor, in which the AC current flows, is disposed adjacent to the first cutout, the current detection printed board functions to output a current flowing in the first wire through electromagnetic induction; and

a voltage detection printed board having a second cutout, and including;

a third wire that is formed along the periphery of the second cutout; and

a fourth wire for output that is connected to a part of the third wire,

wherein when the power transmission conductor, in which the AC voltage is generated, is disposed adjacent to the second cutout, and the third wire makes a pair with a portion of the power transmission conductor facing the third wire and functions as an electrode of a capacitor, the voltage detection printed board functions to output a voltage generated in the third wire from the fourth wire.

19. The current/voltage detector according to claim 18,

wherein the first wire includes:

through holes formed at the penetrating portion penetrating between the top conductive layer and the bottom conductive layer of the board or the part of layers of the board; and

pattern wires formed on the top conductive layer and the bottom conductive layer of the penetrating portion.

20. The current/voltage detector according to claim 18,

wherein the third wire includes:

along the periphery of the second cutout, a plurality of through holes penetrating between the top conductive layer and the bottom conductive layer of the board or a part of layers of the board; and

a pattern wire formed on at least one layer between the top conductive layer and the bottom conductive layer of the penetrating portion so as to connect the through holes.

21. The current/voltage detector according to claim 18,

wherein, when a plurality of the first wires are formed on the board, both ends or electrically identical portions of each wire are electrically connectable to both ends or electrically identical positions of another wire.

22. The current/voltage detector according to claim 18, further comprising:

a first conversion circuit that converts the current output from the second wire of the current detection printed board into a predetermined voltage level;

a fifth wire that outputs the voltage converted by the first conversion circuit;

a second conversion circuit that converts the voltage output from the fourth wire of the voltage detection printed board into a predetermined voltage level; and

a sixth wire that outputs the voltage converted by the second conversion circuit.

23. The current/voltage detector according to claim 22,

wherein the first conversion circuit is provided on the current detection printed board, and

the second conversion circuit is provided on the voltage detection printed board.

24. The current/voltage detector according to claim 22, further comprising:

a conductor casing that fixes the current detection printed board and the voltage detection printed board therein,

wherein the casing has;

an opening through which a magnetic flux acting on the first wire passes;

an opening that allows the third wire and the power transmission conductor to be not shielded;

an opening through which the fifth wire is led to the outside; and

an opening through which the sixth wire is led to the outside, and

wherein the casing is configured to cover the current detection printed board and the voltage detection printed board, excluding the openings.

25. The current/voltage detector according to claim 24, wherein the casing includes:

a first casing that fixes the current detection printed board;

a second casing that fixes the voltage detection printed board;

a first cover that covers the first casing; and

a second cover that covers the second casing, and

wherein the first casing and the second casing are disposed such that the first cutout provided in the current detection printed board and the second cutout provided in the voltage detection printed board are substantially coaxially located.

26. The current/voltage detector according to claim 24, wherein the casing includes:

a first casing that fixes the current detection printed board;

a second casing that fixes the voltage detection printed board,

a first cover that covers the first casing; and

a second cover that covers the second casing, and

wherein the first cutout provided in the current detection printed board and the second cutout provided in the voltage detection printed board are substantially the same size, and the first casing and the second casing are disposed such that the first cutout and the second cutout are combined to be opposed to each other and the combined portion has a substantially circular shape.

27. The current/voltage detector according to claim 25,

wherein a shield member that reduces the amount of an electromagnetic wave entering from a side of the first wire into a side of the first conversion circuit is provided in at least one of the first casing and the first cover, and

wherein a shield member that reduces the amount of an electromagnetic wave entering from a side of the third wire into a side of the second conversion circuit is provided in at least one of the second casing and the second cover.

28. The current/voltage detector according to claim 25,

wherein the first casing and the second casing are formed in a single body.

29. The current/voltage detector according to claim 24,

wherein the casing includes a fixing unit that substantially fixes the relative position between the power transmission conductor, and the current detection printed board and the voltage detection printed board.

30. The current/voltage detector according to claim 18,

wherein the first cutout and the second cutout have a substantially semicircular shape.

31. The current/voltage detector according to claim 18,

wherein the AC power is AC power having a frequency of a radio frequency band.

32. A current detector that detects an AC current flowing in a power transmission conductor to be used as an AC power transmission path, the current detector comprising:

a current detection printed board having a first cutout, and including;

at least one first wire that is formed in a coiled shape and has both ends by penetrating between a top conductive layer and a bottom conductive layer of the board along the periphery of the first cutout and alternately connecting the top conductive layer and the bottom conductive layer of the board, and/or

at least one wire that is formed in a coiled shape and has both ends by penetrating a part of layers of the board along the periphery of the first cutout and alternately connecting a top conductive layer and a bottom conductive layer of the penetrating portion, and

a second wire for output that is connected to all or a part of both ends of the first wire,

wherein when the power transmission conductor, in which the AC current flows, is disposed adjacent to the first cutout, the current detection printed board functions to output a current flowing in the first wire through electromagnetic induction.

33. The current detector according to claim 32, further comprising:

a first conversion circuit that converts the current output from the second wire of the current detection printed board into a predetermined voltage level; and

a third wire that outputs the voltage converted by the first conversion circuit.

34. The current detector according to claim 33,

wherein the first conversion circuit is provided on the current detection printed board.

35. The current detector according to claim 33, further comprising a conductor casing that fixes the current detection printed board therein,

wherein the casing has:

an opening through which a magnetic flux acting on the first wire passes; and

an opening through which a third wire is led to the outside, and

wherein the casing is configured to cover the current detection printed board, excluding the openings.

36. The current detector according to claim 32,

wherein the first cutout has a substantially semicircular shape.

37. The current detector according to claim 32,

wherein the AC power is AC power having a frequency of a radio frequency band.

38. A voltage detector that detects an AC voltage generated in a power transmission conductor to be used as an AC power transmission path, the voltage detector comprising:

a voltage detection printed board having a first cutout, and including;

a first wire that is formed along the periphery of the first cutout, and

a second wire for output that is connected to a part of the first wire,

wherein when the power transmission conductor, in which the AC voltage is generated, is disposed adjacent to the first cutout, and the first wire makes a pair with a portion of the power transmission conductor facing the first wire and functions as an electrode of a capacitor, the voltage detection printed board functions to output a voltage generated in the first wire from the second wire.

39. The voltage detector according to claim 38, further comprising:

a first conversion circuit that converts the voltage output from the second wire of the voltage detection printed board into a predetermined voltage level; and

a third wire that output the voltage converted by the first conversion circuit.

40. The voltage detector according to claim 39,

wherein the first conversion circuit is provided on the voltage detection printed board.

41. The voltage detector according to claim 39, further comprising a conductor casing that fixes the voltage detection printed board therein,

wherein the casing has:

an opening that allows the first wire and the power transmission conductor to be not shielded, and

an opening through which the third wire is led to the outside; and

the casing is configured to cover the voltage detection printed board, excluding the openings.

42. The voltage detector according to claim 38,

wherein the first cutout has a substantially semicircular shape.

43. The current detector according to claim 38,

wherein the AC power is AC power having a frequency of a radio frequency band.