| 摘要 |
<p>PURPOSE:To obtain the electromagnetic device of simple constitution with which inductance or output can be changed as well reducing heating power by a method wherein a split-core part with which main magnetic flux will be branched off is provided at a part of the core which forms a main magnetic circuit, and two control windings are provided on said split core part, thereby enabling to control the main magnetic flux. CONSTITUTION:Pertaining to the assembling of the titled device, a main winding 2 is wound around an E-type core 11, the split core part 3 whereon control windings 41 and 42 are wound around is arranged on the center leg end part of the E-type core 11, and after an I-type core 12 has been opposed to the side leg of the E-type core 11 and the split core part 3, the core 11 is fixed. Then, with regard to the electric characteristics of the device, magnetic flux A is generated when a DC current is applied to the control windings 41 and 42 from a DC power source 5, no main magnetic flux runs (or reduced) on the main winding 2 when the split core part 3 is magnetically saturated by the magnetic flux A, and the value of inductance can be changed. When no DC current is supplied from the power source 5, the main magnetic flux by the main winding 2 is branched off and interlinked as in B and C on the control windings 41 and 42. A voltage is induced on the control windings 41 and 42, but the windings have the polarity with is cancelled each other.</p> |
