BRUSHLESS DIRECT CURRENT (BLDC) MOTOR

摘要

A brushless direct current (BLDC) motor includes a magnet which includes N poles and S poles extending in the up-down direction. The N poles and S poles are arranged to alternate with each other, surround an exterior of a shaft, and have a cylindrical shape when assembled. The magnet has upper and lower tapered portions in upper and lower portions thereof, with the diameter decreasing in the direction toward opposite ends, and a fixing center groove formed in the middle thereof. Fixing caps respectively have inclined portions at positions corresponding to the upper and lower tapered portions of the magnet so that the tapered portions fit into the inclined portions, thereby fixing an axial position of the magnet. A center ring is fitted into the center groove of the magnet in order to prevent the magnet from being dislodged while a rotor is rotating.

主权项

1. A brushless direct current motor comprising:
a magnet including N poles and S poles extending in an up-down direction, wherein the N poles and S poles are arranged so as to alternate with each other, surround an exterior of a shaft, and have a cylindrical shape when assembled, wherein the magnet has upper and lower tapered portions in upper and lower portions thereof, the upper and lower tapered portions narrowing in a direction toward opposite ends, and a fixing center groove disposed in a middle thereof; fixing caps respectively having inclined portions at positions corresponding to the upper and lower tapered portions of the magnet so that the tapered portions fit into the inclined portions, thereby fixing an axial position of the magnet; and a center ring fitted into the center groove of the magnet to prevent the magnet from being dislodged while a rotor is rotating.