METHOD FOR MANUFACTURING COIL ON TOROIDAL MAGNETIC CIRCUIT AND COIL ON TOROIDAL MAGNETIC CIRCUIT

摘要

PURPOSE: To make compact, precise and low-priced coils by a method wherein a conductor coated with a thermal adhesive vanish is wound on a cylindrical mandrel to manufacture linear coils, and a lip-like part of an air gap is separated to open a toroidal magnetic circuit. ;CONSTITUTION: A toroidal magnetic core 1 with an air gap is a circular ring having an air gap 2 of width e. Coils 4 are arranged around the toroidal magnetic core 1 with an air gap and are formed of a copper wire coated with a thermal adhesive insulating varnish. The coils 4 have an extension length L shorter than that of the toroidal magnetic core 1; and an inner diameter slightly larger than a diameter ϕ of a rod constituting a toroidal core. Winding is adhered sequentialy by heating at a temperature between 140 and 160°C. Lip-like parts 6, 7 are separated in vertical directions (arrows 8, 9) to the plane of the core, and the coil 4 is slid on the core 1 in the direction of arrow 10.;COPYRIGHT: (C)1996,JPO