ELECTROMAGNETIC COIL DEVICE

摘要

The purpose of the present invention is to provide an electromagnetic coil device that can reduce surge voltage generated in the electromagnetic coil without providing a diode for surge voltage reduction. The electromagnetic coil device is characterized by being provided with the following: an electromagnetic coil around which a coil wire is wound; a first electrical conductor provided near the electromagnetic coil and electrically insulated from the electromagnetic coil; and a second electrical conductor provided to the first electrical conductor, or provided between the first electrical conductor and the electromagnetic coil, and electrically insulated from the electromagnetic coil, wherein the second electrical conductor is provided so that an eddy current flows if the current flowing in the electromagnetic coil changes.