Patent ID: 8569628

Claim:
An insulated wire to be used for a coil for electrical equipment controlled by an inverter having an insulation film composed of a plurality of layers provided on a conductor, wherein: the plurality of layers comprises a first film layer and a second film layer; the first film layer is made of a first resin composition formed by graft-polymerizing a graft compound with an ethylene-tetrafluoroethylene copolymer and is provided on a circumference of the conductor; the second film layer is made of a second resin composition being a polymer alloy made of a polyether ether ketone resin and a polyamide resin and is provided on a circumference of the first film layer; the storage elastic modulus of the second resin composition is 1 GPa or more at 20° C., and 10 MPa or more at 200° C.; the insulated wire has a partial-discharge start voltage of 1500 V or more and is configured to be used for a coil for electrical equipment controlled by an inverter; and the insulated wire has an adhesion property that, when a five-coil worth length of insulated wire is wound onto a winding rod having a diameter equivalent to a diameter of the conductor, and inspected for abnormalities selected from the group consisting of cracks, flaws, wrinkles and peeling an optical microscope at a magnification of 50, the insulation film does not exhibit any of said abnormalities.