| 摘要 |
<p>PURPOSE: To provide an electromagnetic device in which a withstand voltage between winding wires can be ensured and which can be reduced in size and cost. CONSTITUTION: A groove section 11a for wiring primary winding n1 is provided at one end of the barrel section of a bobbin 10 and, at the same time, a spiral groove section 11b for wiring secondary wiring n21 having a diameter larger than that of the primary winding n1 is provided in the remaining part of the barrel section of the bobbin 10. In addition, two spiral groove sections 11c for wiring another secondary winding n22 having a smaller diameter are provided on the bottom of the groove section 11b. Then one secondary winding n2 is formed by connecting the terminating end of the winding n21 with the starting end of the winding n22 on the outside of the bobbin 10.</p> |
