Magnetic field generating device and electric motor including the same

Abstract

Provided are a magnetic field generating device and an electric motor with which it is possible to generate a large amount of magnetic flux using a simple construction. The magnetic field generating device is provided with a magnetic pole element, a facing magnetic body opposing the same in an opposing direction, and an inner support member. The magnetic pole element includes a plurality of first iron cores, a plurality of second iron cores, a plurality of third iron cores, a plurality of fourth iron cores, and a plurality of back surface permanent magnets. Each of the plurality of first to fourth iron cores has a magnetic pole surface opposing the facing magnetic body and a back surface on the opposite side thereto, and the plurality of back surface permanent magnets are disposed on the back surfaces of each of the plurality of first to fourth iron cores. The plurality of first and third iron cores are arranged alternately in a first arrangement direction perpendicular to the opposing direction, to form a first iron core row. The plurality of second and fourth iron cores are arranged alternately in the first arrangement direction to form a second iron core row. The inner support member is positioned between the first iron core row and the second iron core row, and supports each of the first iron core row and the second iron core row on both sides of the inner support member in a second arrangement direction.