| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a transformer and its wound core, capable of reducing a difference in average magnetic path lengths of cores located in the inside and on the outside. <P>SOLUTION: The wound core 1 of a three-phase transformer is constituted of two inner cores 2 and 2, adjoining each other on a leg, an outer core 3 provided to surround the inner cores 2 and 2, and side leg cores 4 and 4 provided adjacent to both legs of the outer core 3. A total of stacked thickness of the outer core 3, and the side leg core 4 is specified to be approximately equal to core stacked thickness of the inner core 2. The wound core 1 is constituted, such that the ratio of the respective core thickness is varied by comparing an average magnetic path length of the outer core 3 with a total of the average magnetic path length of the side leg cores 4, so that the core stacked thickness (cross section of the wound core) with the longer average magnetic path length is gradually decreased, also the thickness (cross section of the wound core) with the shorter average magnetic path length is gradually increased, and a total of the core stacked thickness of the outer core 3 and the side leg core 4 is always approximately equal to the core stacked thickness of the inner core 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
