Abstract
A parametric motor has numerous attractive features not found in ordinary motors, such as over-load protection, Simple construction, low cost, and low noise. This paper discusses the mechanism of iron loss occurring in the core of a parametric motor, with a view to further improving the motor's characteristics and putting it to practical use. It is shown that a greater part of the iron loss in the motor occurs in the common magnetic circuit, and is caused by an alternating magnetic flux along a direction perpendicular to the plane of the lamination. It is also shown that the eddy current loss occurring in the common magnetic circuit when the common magnetic circuit is radially excited is closely related to the magnetization process due to the domain wall displacement.
