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

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.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1A to 1D are diagrams showing an example of a current detection printed board 1 according to the invention.

FIG. 2 is a diagram showing a case where a power transmission conductor 66, in which an AC current flows, and an insulator 69 covering the power transmission conductor 66 are disposed to pass through a penetration hole 101 provided in the current detection printed board 1.

FIGS. 3A to 3E are diagrams showing another example of the current detection printed board 1 according to the invention.

FIGS. 4A and 4B are diagram showing another example of a coiled wire 10.

FIG. 5 is diagram showing another example of the current detection printed board 1 according to the invention.

FIG. 6 is a connection diagram of the current detection printed board 1 shown in FIG. 5.

FIG. 7 is a diagram showing another example of the current detection printed board 1 according to the invention.

FIGS. 8A to 8E are diagrams showing the arrangement examples of the first coiled wire 10-1 and the second coiled wire 10-2.

FIGS. 9A to 9D are diagrams showing an example of a voltage detection printed board 2 according to the invention.

FIGS. 10A to 10E are diagrams showing another example of the voltage detection printed board 2 according to the invention.

FIGS. 11A and 11B show another example of a ring-shaped wire 30.

FIGS. 12A to 12C are schematic exterior views of a current/voltage detector 3 according to a third embodiment of the invention.

FIGS. 13A and 13B are diagrams showing the schematic configuration of the current/voltage detector 3 shown in FIGS. 12A to 12C.

FIGS. 14A to 14C are diagrams of a casing main body 300.

FIGS. 15A and 15B are diagrams three-dimensionally showing the casing main body 30.

FIGS. 16A and 6B are diagrams when the current detection printed board 1 and the voltage detection printed board 2 are mounted on the casing main body 300 in a state where a current detector cover 301 and a voltage detector cover 302 are not mounted.

FIG. 17 is a cross-sectional view showing a case where the power transmission conductor 66 and the insulator 69 covering the power transmission conductor 66 penetrate the current/voltage detector 3.

FIGS. 18A and 18B show an example of an application of a second shield portion 314.

FIGS. 19A and 19B show a modification of the current detection printed board 1, the voltage detection printed board 2, and the casing.

FIG. 20 is a diagram showing an example where the current detection printed board 1 and the voltage detection printed board 2 are accommodated in separate casings, thereby forming the current detector 310 and the voltage detector 320 separately.

FIG. 21 is a diagram showing an application when the current detector 310 and the voltage detector 320 are provided separately.

FIG. 22 is a diagram showing a case where the voltage detector 320 is disposed near the input and the current detector 310 is disposed at the back of the voltage detector 320.

FIG. 23 is a diagram showing a fixing method of the insulator 69.

FIG. 24 is a diagram showing a fixing method of the insulator 69 when only the current detector 310 is used separately.

FIG. 25 is a diagram showing a case where the sizes of the power transmission conductor 66 and the insulator 69 are suited to the size of the current/voltage detector 3 in the current/voltage detector 3 shown in FIG. 23.

FIG. 26 is a block diagram of an example of a high-frequency power supply system that uses an impedance matching device.

FIG. 27 is a schematic circuit diagram of a current detector 80 and a voltage detector 90 provided between an input terminal and a matching circuit 67 of an impedance matching device 63.

FIG. 28 is a schematic exterior view of the current detector 80 and the voltage detector 90.

FIGS. 29A to 29C are explanatory views illustrating the configuration of the current detector 80 and the voltage detector 90 shown in FIG. 28.

FIG. 30 is a circuit diagram showing a case where the current detector 80 and the voltage detector 90 are provided between the matching circuit and the output terminal in the impedance matching device.

Claims

1. A current detection printed board comprising: a board having a penetration hole that penetrates the board; andat 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.

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 in 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 penetration hole that penetrates the board; andat 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 penetration hole and alternately connecting the top conductive layer and the bottom conductive layer of the board, and/orat least one wire that is formed in a coiled shape and has both ends by penetrating a part of layers of the board 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 to pass through the inside of the penetration hole, a current flowing in the wire is output through electromagnetic induction.

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 in 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 penetration hole has a circular shape, and the wire is formed in a circular shape along the periphery of the penetration hole.

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 penetration hole that penetrates the board; anda wire that is formed along the periphery of the penetration hole,wherein, when a conductor, in which an AC voltage is generated, is disposed to pass through the penetration hole, 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 penetration hole, a plurality of through holes penetrating the board; and pattern wires formed on a top conductive layer and a bottom conductive 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 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.

12. The voltage detection printed board according to claim 9, wherein the through holes have a circular shape, and the wire is formed in a circular shape along the periphery of the penetration hole.

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 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 penetration hole that penetrates the board, and including: at least one first wire that is formed in a coiled shape and has both ends by penetrating the board along the periphery of the first penetration hole and alternately connecting a front surface layer and a rear surface layer of the board; anda 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 an AC current flows, is disposed to pass through the first penetration hole, a current flowing in the first wire is output through electromagnetic induction; anda voltage detection printed board having a second penetration hole that penetrates the board, and including: a third wire that is formed along the periphery of the second penetration hole; anda fourth wire for output that is connected to a part of the third wire,wherein when the power transmission conductor, in which an AC voltage is generated, is disposed to pass through the second penetration hole, 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, and a voltage generated in the third wire is output from the fourth wire.

15. The current/voltage detector according to claim 14, wherein the first 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.

16. The current/voltage detector according to claim 14, wherein the third wire includes: along the periphery of the second penetration hole, a plurality of through holes penetrating the board; and pattern wires formed on the front surface layer and the rear surface layer of the board to connect the through holes.

17. 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 penetration hole that penetrates the board, 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 penetration hole and alternately connecting the top conductive layer and the bottom conductive layer of the board, and/orat least one wire that is formed in a coiled shape and has both ends by penetrating a part of layers of the board and alternately connecting a top conductive layer and a bottom conductive layer of the penetrating portion, anda 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 an AC current flows, is disposed to pass through the first penetration hole, a current flowing in the first wire is output through electromagnetic induction; anda voltage detection printed board having a second penetration hole that penetrates the board, and including: a third wire that is formed along the periphery of the second penetration hole; anda fourth wire for output that is connected to a part of the third wire,wherein when the power transmission conductor, in which an AC voltage is generated, is disposed to pass through the second penetration hole, 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, and a voltage generated in the third wire is output from the fourth wire.

18. The current/voltage detector according to claim 17, 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.

19. The current/voltage detector according to claim 17, 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.

20. The current/voltage detector according to claim 17, wherein, when a plurality of the first wires are formed in the board, both ends or electrically identical portions of each wire are electrically connectable to both ends or electrically identical positions of another wire.

21. The current/voltage detector according to claim 17, wherein the first penetration hole provided in the current detection printed board and the second penetration hole provided in the voltage detection printed board are substantially coaxially located.

22. The current/voltage detector according to claim 17, 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; anda sixth wire that outputs the voltage converted by the second conversion circuit.

23. The current/voltage detector according to claim 17, wherein the first conversion circuit is provided on the current detection printed board, andthe second conversion circuit is provided on the voltage detection printed board.

24. The current/voltage detector according to claim 17, further comprising: a conductor casing that fixes the current detection printed board and the voltage detection printed board therein,wherein the casing has: on an axis passing through the first penetration hole provided in the current detection printed board and the second penetration hole provided in the voltage detection printed board, a penetration hole through which the power transmission conductor passes;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; andan opening through which the sixth wire is led to the outside, andwherein 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; anda second cover that covers the second casing, andthe first casing and the second casing are disposed such that both sides thereof overlap each other.

26. 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.

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

31. 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 penetration hole that penetrates the board, and including: at least one first wire that is formed in a coiled shape and has both ends by penetrating the board along the periphery of the first penetration hole and alternately connecting a front surface layer and a rear surface layer of the board, anda 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 an AC current flows, is disposed to pass through the first penetration hole, a current flowing in the first wire is output through electromagnetic induction.

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 penetration hole that penetrates the board, 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 penetration hole and alternately connecting the top conductive layer and the bottom conductive layer of the board, and/orat least one first wire that is formed in a coiled shape and has both ends by penetrating a part of layers of the board and alternately connecting a top conductive layer and a bottom conductive layer of the penetrating portion; anda 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 an AC current flows, is disposed to pass through the first penetration hole, and a current flowing in the first wire is output 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; anda 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 32, further comprising: a conductor casing that fixes the current detection printed board therein,wherein the casing has: on an axis passing through the first penetration hole provided in the current detection printed board;a penetration hole through which the power transmission conductor passes;an opening through which a magnetic flux acting on the first wire passes; andan opening through which a third wire is led to the outside, andwherein the casing is configured to cover the current detection printed board, excluding the openings.

36. The current detector according to claim 35, wherein the casing includes:a first casing that fixes the current detection printed board; anda first cover that covers the first casing.

37. The current detector according to claim 36, wherein a shield member that reduces the amount of an electromagnetic wave entering from the first wire into the first conversion circuit is provided in at least one of the first casing and the first cover.

38. The current detector according to claim 35, wherein the casing includes a fixing unit that substantially fixes the relative position between the power transmission conductor and the current detection printed board.

39. The current detector according to claim 32, wherein the AC power is AC power having a frequency of a radio frequency band.

40. 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 penetration hole that penetrates the board, and including: a first wire that is formed along the periphery of the first penetration hole, anda second wire for output that is connected to a part of the first wire,wherein when the power transmission conductor, in which an AC voltage is generated, is disposed to pass through the first penetration hole, the first wire functions as an electrode of a capacitor by making a pair with a portion of the power transmission conductor facing the first wire, and a voltage generated in the first wire is output from the second wire.

41. The voltage detector according to claim 40, 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; anda third wire that output the voltage converted by the first conversion circuit.

42. The voltage detector according to claim 41, wherein the first conversion circuit is provided on the voltage detection printed board.

43. The voltage detector according to claim 40, further comprising: a conductor casing that fixes the voltage detection printed board therein,wherein the casing has: on an axis passing through the first penetration hole provided in the voltage detection printed board;a penetration hole through which the power transmission conductor passes;an opening that allows the first wire and the power transmission conductor to be not shielded, andan opening through which the third wire is led to the outside; andthe casing is configured to cover the voltage detection printed board, excluding the openings.

44. The voltage detector according to claim 43, wherein the casing includes:a first casing that fixes the voltage detection printed board; anda first cover that covers the second casing.

45. The voltage detector according to claim 44, 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.

46. The voltage detector according to claim 43, wherein the casing includes a fixing unit that substantially fixes the relative position between the power transmission conductor and the voltage detection printed board.

47. The current detector according to claim 40, wherein the AC power is AC power having a frequency of a radio frequency band.