| 摘要 |
<p>PURPOSE:To reduce the maintenance expenses of a flyback transformer and to decrease the power loss of the transformer by molding a variable inductance coil connected to a focusing voltage coil integrally with the transformer and externally adjusting the magnetic core of a variable inductance. CONSTITUTION:A low voltage coil Ll, a high voltage coil Lh and a focusing voltage supplying circuit Fc are provided in a flyback transformer F, and a magnetic core C formed of a pair of ferrite cores is exposed except a coil bobbin penetrating part, a unit dividing coil l3 of the coil Lh is provided in the circuit Fc, a variable inductance I is provided at the connecting point of a rectifying diode D2 and an anode, and the other end of the inductance I is connected to a diode Df. The coil bobbin b of the inductance I is secured as a part of the insulating molding case K of the transformer F to an integrally molded projected post A, the magnetic core C is thus enabled to be adjusted, and the power loss can be reduced.</p> |
