LINEAR MOTOR

摘要

A linear motor includes: an annular yoke; a rod that penetrates the yoke in a yoke axis direction; a plurality of teeth disposed at equal intervals in the yoke axis direction so as to project from an inner peripheral surface of the yoke; slots respectively formed between adjacent teeth of the plurality of teeth, a plurality of coils respectively disposed in the slots, and permanent magnets arranged and held in the rod in the yoke axis direction. The yoke is configured so that the slots are disposed repeatedly by a reference number determined in accordance with the number of phases of an alternating current passed through the coils, and a width adjusting unit configured to adjust a tooth width is provided in an Nth tooth from a yoke end, the Nth tooth being determined by Equation (1).

主权项

1. A linear motor comprising:
an annular yoke; a rod that penetrates the yoke in a yoke axis direction; a plurality of teeth disposed at intervals in the yoke axis direction so as to project from an inner peripheral surface of the yoke; slots respectively formed between adjacent teeth of the plurality of teeth; a plurality of coils respectively disposed in the slots; and permanent magnets arranged and held in the rod in the yoke axis direction, wherein the yoke is configured so that the slots are disposed repeatedly by a reference number determined in accordance with the number of phases of an alternating current that is passed through the coils, and wherein a width adjusting unit configured to adjust a tooth width is provided in an Nth tooth from a yoke end, the Nth tooth being determined by Equation (1), shown below:
N=S×n+1  (1) S: the reference number of slots, n: a positive integer smaller than a value obtained by dividing the total number of slots by the slot reference number.