BOBBIN FOR TRANSFORMER AND TRANSFORMER ITSELF

摘要

PROBLEM TO BE SOLVED: To improve dielectric strength performance between windings and that between a winding and a core member, while reducing production costs. SOLUTION: A bobbin for transformer 1 is equipped with an inside spool 2 and an outside spool 3. The inside spool 2 is constituted in a cylindrical shape having no bottom, enabling core members to be inserted into an inside space 2b, and enabling the 1st conductor to be wound. The outside spool 3 is constituted in a cylindrical shape having no bottom, enabling the inside spool 2 which is wound by the 1st conductor to be inserted, and enabling the 2nd conductor to be wound. In addition, the bobbin for transformer 1 is equipped with insulating spool cases 4 and 5 for expanding either or both of the creeping distance between the 1st conductor and the 2st conductor, which are wound on both spools 2 and 3 respectively, and the creeping distance between the inserted core member and either of the 1st conductor or the 2nd conductor.