US 2012/0068581 A1 · FAN AND MOTOR THEREOF

Abstract

A motor includes a base plate, a stator, a rotor, a circuit board and a Hall element. The stator is disposed on the base plate. The rotor is disposed around the stator, and includes a rotating shaft and a magnetic assembly. The rotating shaft is extended to a center part of the stator. The magnetic assembly includes plural magnets. The circuit board is arranged between the stator and the base plate and comprises a Hall element. A first gap and a second gap are arranged between every two adjacent magnets. The first gap is in the vicinity of the Hall element, and opposed to the second gap. The distance of a vacant portion of the first gap is shorter than the distance of the second gap, thereby facilitating continuous and steady magnetic induction between the Hall element and the magnetic assembly.

Claims10

Dependent claims

A motor of a brushless fan, said motor comprising:

a base plate;
a stator disposed on said base plate;
a rotor disposed around said stator, and comprising a rotating shaft and a magnetic assembly, wherein said rotating shaft is extended to a center part of said stator, and said magnetic assembly comprises plural magnets;
and
a circuit board arranged between said stator and said base plate, and comprising a Hall element;
wherein a first gap and a second gap are arranged between every two adjacent magnets, said first gap is in the vicinity of said Hall element and opposed to said second gap, and the distance of a vacant portion of said first gap is shorter than the distance of said second gap, thereby facilitating continuous and steady magnetic induction between said Hall element and said magnetic assembly.

3 more elements

Dependencies are inferred from the claim text.

Fan and motor thereof

Life of this patent

Fan and motor thereof

Life of this patent

Abstract

Claims10