| 摘要 |
<p>The invention relates to a current detector using a magnetic balance system and method of manufacturing same. A plurality of taps N, N-1, N-2, N+1, and N+2 are connected to the output side of the secondary coil, and provided on the winding side of a secondary coil in winding device including a bobbin 120 and PCB 130 at prescribed intervals. The taps respectively correspond to different numbers of turns. Connector sections 200N, 200N-1, 200N-2, 200N+1, and 200N+2 as a tap switching devise is provided. When the tap N is selected to be used, and the connector sections 200N-1, 200N-2, 200N+1, and 200N+2 corresponding to the other taps N-1, N-2, N+1, and N+2 are cut by laser-trimming and electrically disconnected, thereby altering the number of turns of the secondary coil and adjusting the accuracy. Further minute accuracy adjustment is performed by cutting a trimming resistance 203N common to all the taps by laser-trimming.</p> |
