To achieve the simplification of a coil configuration, the simplification of a whole motor-coil structure in a motor, and loosening of regulations to the minimal radius of a winding in a high-temperature superconductive coil.

A method of winding a motor coil is to bring the coil into contact with a plurality of iron cores or air cores 8-1 to 8-12 along the peripheral direction. Further, the motor coil is constituted of two sets of coils: one set of coils periodically reversing the contact surfaces from outer side to inner side and vice versa to cause a reversing period every two iron cores or air cores; and another set of coils disposed at the reversing position shifted by half period from the coil.