Abstract: A plane transformer has both a primary plane coil and secondary plane coils fitted in a fitting groove formed on a substrate composed of a magnetic substance. At least either of the primary plane coil and the secondary plane coils is separated into two, so that an output voltage is variably controlled by changing the numbers of turns of the primary and secondary plane coils. The plane transformer can be small in size and thickness, reduces generated heat, and hardly emits electromagnetic noises.
Type:
Grant
Filed:
January 28, 1997
Date of Patent:
May 9, 2000
Assignees:
Alps Electric Co., Ltd., Takashi Yamaguchi, Ichiro Sasada