| 摘要 |
PURPOSE: To facilitate winding and assembly by forming a toroidal transformer from an open magnetic core having an annular sector that is parallel with an annular principal electric circuit defined by an air gap, and is placed between an internal electric winding and an external electric winding. CONSTITUTION: A subassembly is provided with a first electric winding of an appropriate number of turns wound around an electric circuit 20, that is, an internal electric winding 26. A magnetic core 42 is made of a laminate of rectangular magnetic metal sheets that is installed and bent from the outer side in the radial direction in the notch in a bar 35. After the installation, the metal sheets of the magnetic core 42 are held in an appropriate position in the notch by a peripheral tape 43 that insulates and holds the magnetic core 42 in position. An external winding 48 covers part of the magnetic core 42, the internal winding and a second air gap 47. This facilitates winding and assembling operations. |
