US 6,608,411 B2Granted

Direct current brushless motor

AssigneeSunonwealth Electric Machine Industry Co., Ltd.

InventorsAlex Horng, Tso-Kuo Yin, Ching-Shen Hong

Life of this patent

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Abstract

A direct current brushless motor includes a base having a receiving chamber whose one end is combined with a cover plate. The other end of the receiving chamber and the cover plate each have a shaft hole, for pivoting the rotation shaft of the rotor. A film printed circuit is mounted on the periphery of the base. The film printed circuit has at least two coil sets, a set of Hall sensing drive member, and a connecting end for connection with a power supply. The coil sets are oppositely distributed on the periphery of the base in an equally angular manner with the receiving chamber serving as a center. After the coil sets are energized, the multiple coil sets and the permanent magnet ring of the rotor may produce mutually repulsive forces, so that the rotor may be driven to rotate successively.

Claims7

Dependent claims

A direct current brushless motor, comprising:

a base, having a single slot extending around a periphery of the base and a receiving chamber whose one end is formed with a shaft hole;
a film printed circuit, having at least two coil sets, a Hall sensing drive member set, and a connecting end for connecting on with a power supply, the film printed circuit being positioned in the signal slot so as to extend around a periphery of the base, and each of the coil sets of the film printed circuit being oppositely distributed on the periphery of the base in an equally angular manner with the receiving chamber serving as a center;
and
a rotor, having a rotation shaft and a permanent magnet ring, the rotation shaft pivoted on the shaft hole of the base, the permanent magnet ring and each of the coil sets around the periphery of the base directly producing mutually repulsive forces, so that the rotor is driven to rotate successively.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 09/987,306Filed 14 Nov 2001
Published: US 2003/0090171 A115 May 2003
Granted: 19 Aug 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H02K 21/14
With stationary armatures and rotating magnets: with magnets rotating within the armatures
H02K 3/26
Windings characterised by the conductor shape, form or construction, e.g. with bar conductors: consisting of printed conductors
H02K 3/47
Fastening of windings on the stator or rotor structure: air-gap windings, i.e. iron-free windings
H02K 29/08
With position sensing devices: using magnetic effect devices, e.g. Hall-plates, magneto-resistors