Electromagnetic device

An electromagnetic device comprising:

• an outer peripheral iron core;
• and
• at least three iron core coils which are in contact with the inner surface of the outer peripheral iron core, wherein
• the at least three iron core coils each include an iron core, and at least one of a primary coil and a secondary coil, which are wound around the iron core,
• the at least three iron core coils are arranged on a circumference of a circle, and the iron core of one iron core coil of the at least three iron core coils is integral with the iron cores of the other iron core coils adjacent to the one iron core coil, and each of the iron cores of the at least three iron core coils are integrally formed as a single iron core;
• each of the iron cores of the at least three iron core coils converge on a center of the outer peripheral iron core;
• the outer peripheral iron core is comprised of a plurality of outer peripheral iron core portions and each of radially outside ends of the iron cores of the at least three iron core coils, which are inserted among the outer peripheral iron core portions;
• and
• each of the radially outside ends of the iron cores extend to an outer peripheral surface of the outer peripheral iron core.