US 2014/0227118 A1 · WATER-PUMP MOTOR USING A WATERPROOF STATOR, AND WATER PUMP

Abstract

Provided are a water pump motor that employs a stator core of an outer winding method that can use a low-cost ferrite magnet by minimizing an air gap between a magnet of a rotor and a stator core, and that heightens a fill factor, to thereby maximize efficiency of the motor, and a water pump using the water pump motor. The water pump motor includes a stator and an inner type rotor, in which the stator includes: a stator core whose inner circumferential portion is annularly interconnected, in which a number of protrusions are radially extended and formed; insulating bobbins that surround the stator core; a coil wound around the outer circumference of each bobbin; and an annular back yoke that surrounds in contact with the outer end of the stator core. The insulating bobbins are annularly molded to surround the inner circumferential portion of the stator core, and entirely surround the inner circumferential portion of the stator core, to thus make the inner side surface play a role of a sealing cover, and the rotor includes ferrite magnets in opposition to the inner side surfaces of the bobbins.

Claims16

Dependent claims

A water pump motor having a stator and an inner type rotor that is placed on the inside of the stator, the water pump motor comprising:

the stator including:
a stator core whose inner circumferential portion is annularly interconnected to allow outer windings, in which a number of protrusions are radially extended and formed;
insulating bobbins that are annularly molded to surround the respective protrusions of the stator core, and entirely surround the inner circumferential portion of the stator core, to thus make the inner side surface play a role of a sealing cover and the outer side surface play a role of limiting an area of a coil winding portion;
a coil wound around the outer circumference of each bobbin;
and
an annular back yoke whose inner circumferential portion is compressed and coupled in contact with the protrusions of the stator core;
and
the rotor including a number of ferrite magnets in opposition to the inner side surfaces of the bobbins.

5 more elements

A water pump comprising:

a pump body whose lower side is open and that is provided with an accommodation space on the inside;
a water pump motor comprising a stator that is coupled on the inner circumferential portion of the pump body, a plurality of magnets that are rotatably driven by the stator, and a rotor that is coupled with a drive shaft at the center thereof;
an impeller that is connected to the distal end of the drive shaft that penetrates the pump body and that is extended upwards;
and
an upper case that is coupled to the upper portion of the pump body to guide inlet and outlet of cooling water circulating by the impeller,
wherein the stator is configured so that an annular back yoke is compressively coupled with protrusions of a stator core whose inner circumferential portion is annularly interconnected to allow outer windings, in which a number of protrusions are radially extended and formed, and insulating bobbins are formed in the protrusions and inner circumferential portion of the stator core, and
the rotor is configured so that a number of ferrite magnets are radially attached on the outer circumference of the rotor core that is coupled to the outer circumference of the drive shaft and plays a role of the back yoke in opposition to the inner circumferential portions of the insulating bobbins.

4 more elements

Dependencies are inferred from the claim text.

Water-pump motor using a waterproof stator, and water pump

Life of this patent

Water-pump motor using a waterproof stator, and water pump

Life of this patent

Abstract

Claims16