Current detection printed board, voltage detection printed board, current/voltage detection printed board, current/voltage detector, 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.

1 . A current detection printed board comprising:
 a board formed with a cutout having a substantially semicircular shape and adapted to be disposed adjacent to a conductor in which an AC current flows;   a first current transformer consisting of a first single wire extending at a periphery of the cutout while penetrating a first layer of the board and alternately passing over a front face and a rear face of the first layer;   a second current transformer consisting of a second single wire extending at the periphery of the cutout while penetrating a second layer of the board and alternately passing over a front face and a rear face of the first layer;   a first terminal electrically connected to a first end of the first current transformer;   a second terminal electrically connected to a second end of the first current transformer;   a third terminal electrically connected to a first end of the second current transformer; and   a fourth terminal electrically connected to a second end of the second current transformer;   
     
     
         2 . The current detection printed board according to  claim 1 , wherein:
 the second terminal and the third terminal are electrically connected, so that the first current transformer is electrically connected to the second current transformer in series.   
     
     
         3 . The current detection printed board according to  claim 1 , wherein:
 the first terminal and the third terminal are electrically connected, and the second terminal and the fourth terminal are electrically connected, so that the first current transformer is electrically connected to the second current transformer in parallel.   
     
     
         4 . The current detection printed board according to  claim 1 , wherein:
 the first layer is formed with a plurality of first through holes; and   the first single wire includes printed patterns passing over the front face and the rear face of the first layer, and parts penetrating the first through holes.   
     
     
         5 . The current detection printed board according to  claim 1 , wherein:
 the front face of the first layer is a front face of the board.   
     
     
         6 . The current detection printed board according to  claim 1 , wherein:
 the rear face of the first layer is a rear face of the board.   
     
     
         7 . The current detection printed board according to  claim 1 , further comprising:
 a current converter provided on the board and electrically connected to the first current transformer.   
     
     
         8 . The current detection printed board according to  claim 1 , wherein:
 the first layer includes at least a pair of conductive layers sandwiching an insulative layer therebetween.   
     
     
         9 . The current detection printed board according to claim  1 , wherein:
 the second layer is formed with a plurality of second through holes; and   the second single wire includes printed patterns passing over the second front face and the second rear face, and parts penetrating the second through holes.   
     
     
         10 . The current detection printed board according to  claim 1 , wherein:
 the front face of the second layer is a front face of the board.   
     
     
         11 . The current detection printed board according to  claim 1 , wherein:
 the rear face of the second layer is a rear face of the board.   
     
     
         12 . The current detection printed board according to  claim 1 , wherein:
 the second layer is identical with the first layer.   
     
     
         13 . The current detection printed board according to  claim 1 , wherein:
 the second layer is different from the first layer.   
     
     
         14 . The current detection printed board according to  claim 1 , wherein:
 the first current transformer and the second current transformer extend so as to form a double helix.