| 摘要 |
<p>PURPOSE:To reduce leakage flux occurring in the vicinity of a gap and prevent abnormal heating of a coil in the vicinity of the gap by making at least one of opposite magnetic core parts of regions forming the gap into a shape wherein a lateral cross-sectional area at a tip is smaller than that at a base. CONSTITUTION:First legs 2a, 3a and second Legs 2b, 3b of first and second magnetic cores 2,3 having a U-shaped cross section are respectively placed in opposite locations via gaps 5, while a first coil 6 and a second coil 7 are wound to cover these gaps 5 inside. Each of the opposite first legs 2a, 3a and second legs 2b, 3b is formed in such a shape that a lateral cross-sectional area B at a tip is smaller than a lateral cross-sectional area A at a base. Thus concentration of leakage flux can be dispersed into a plurality of coils so that abnormal heating of the coils can be prevented.</p> |
