ELECTROMAGNETIC COILS, METHOD OF MANUFACTURING SAME, AND INSULATING TAPES

摘要

An electromagnetic coil having an insulating coating formed by alternately laminating, on a coil conductor, a mica layer including mica and a reinforcing layer including fiber reinforcing material, inorganic particles and resin, wherein the inorganic particles include secondary agglomerate particles formed by agglomeration of primary particles of hexagonal crystal boron nitride. The electromagnetic coil is provided with an insulating coating that suppresses external outflow of inorganic particles and ensures favorable thermal conductivity. Furthermore, the invention also provides an insulating tape having a mica layer including mica and a reinforcing layer including fiber reinforcing material, inorganic particles and resin, which is layered on the mica layer, wherein the inorganic particles include secondary agglomerate particles formed by agglomeration of primary particles of hexagonal crystal boron nitride. This insulating tape is provided with an insulating coating that suppresses external outflow of inorganic particles and ensures favorable thermal conductivity.

主权项

1. An electromagnetic coil having an insulating coating formed by alternately laminating, on a coil conductor, a mica layer including mica, and a reinforcing layer including a fiber reinforcing material, inorganic particles and resin,
wherein a thickness t3 of the mica layer is in a range of 60 μm≦t3≦150 μm, the fiber reinforcing material has opening sections in which the length of one edge is 50 μm or more, and the inorganic particles include secondary agglomerate particles formed by agglomeration of primary particles of hexagonal crystal boron nitride.