| 摘要 |
<p>PURPOSE: To enable magnetic fluxes to cancel effectively each other by a method wherein a magnetic flux induced in a magnetic path when a loading current is made to flow through a secondary coil is restrained from penetrating through a primary coil which gives an inductive electromotive force to the secondary coil. CONSTITUTION: A primary electric circuit is closed, and when an exciting current 10i is made to flow through the primary circuit, a primary magnetic flux 11f interlinked with the primary coil is produced, and the primary electric circuit is balanced in voltage. As a primary magnetic flux 11f penetrates through a secondary coil 2c wound on the leg of a secondary iron core 2m, an inductive electromotive force is produced in the secondary coil 2c. The secondary coil 2c is connected to a load 21 through a switch 2s and a conductor 9, and when the switch 2s is closed, a load current flows through the secondary troll 2c. At this point, the coils wound on both the legs of the secondary iron core 2m are set equal to each other in number of turns, and the secondary coil 2c is so connected as to become negative in mutual inductance. When a load current flows through the secondary coil 2c, a secondary magnetic flux 22x and an offset magnetic flux 22y are induced in opposite directions to each other, so that, the magnetic fluxes cancel each other.</p> |
