Patent ID: 7615898
Filing Date: 2009-11-10
Classification: F04D,H02K

Abstract:
1. A DC brushless ceiling fan motor having a stator and a rotor therein, comprising: an integral stator including windings and a central axle, the integral stator is made of a permeable material and is formed by means of a secondary production process; a rotor including a top lid, a lower bottom and a circular casing, wherein the circular casing is located between the top lid and the lower bottom, and a permanent magnet is installed on the inner wall of the circular casing, in addition, the bearings are provided in the inner space of the circular casing located between the top lid and the lower bottom, radial blade shafts extend from the lower, and the blades of the ceiling fan are secured to the blade shafts; at the periphery of the circular casing, there are multiple screw sleeves attached to the top lid and the lower bottom, the top lid contains an opening that corresponds to the screw sleeve, and the lower bottom also contains a screw hole corresponding to the screw sleeve such that a screw can be passed through the opening of the top lid and the hollow screw sleeve and can be secured to the screw hole of the lower bottom; a receiver carrier is provided above the top lid and comprises an inner receiver; the stator is installed between the top lid and the lower bottom by passing the axle through the bearings that are located between the top lid and lower bottom; an electrical controlling circuit that is provided in the rotor; and the electrical controlling circuit comprising of a power filter, a power supply, a frequency converter, a phase detector, a computer microprocessor, a remote control device or a manual control switch, a position encoder, a velocity selection switch and a motor rotating-direction selection switch, wherein the computer microprocessor further includes a pulse width modulation output unit.