Stack-type stator using multi-layer substrate, slim motor using same, and blower for air purification system

A slim motor comprising:

• a base plate;
• a support shaft having one end fixed to the base plate;
• a bushing rotatably supported on the support shaft;
• a rotor having a central portion of a back yoke coupled to an outer periphery of the bushing and a plurality of magnets disposed at a lower portion of the back yoke;
• and a stack-type stator disposed above the base plate so as to face the rotor, wherein the stack-type stator comprises:
• a multi-layer substrate having a plurality of first through holes;
• a plurality of coil patterns formed on respective substrates of the multi-layer substrate and each respectively surrounding the plurality of first through holes and forming a plurality of turns;
• a stator yoke disposed at a lower portion of the multi-layer substrate and having a plurality of second through holes each respectively at a position corresponding to each first through hole;
• and plurality of divided cores each having one side protruding above a respective coil pattern formed on the uppermost layer of the multi-layer substrate and the other side being coupled to the corresponding second through hole of the stator yoke through the first through hole of the multi-layer substrate, and wherein the corresponding first and second through holes are arranged in a radial direction in a rectangular shape, the divided core is formed of a plurality of iron pieces laminated along the radial direction, and the plurality of iron pieces each comprises one side protruding from both ends thereof in a round shape to form a shoe portion, and the other side protruding in a rectangular shape to form a tooth portion.

A blower for an air purification system comprising:

• an axial gap type motor;
• and an impeller coupled to the axial gap type motor to suck air in a vehicle,
• wherein the axial gap type motor comprises:
• a stack-type stator disposed above a base plate;
• and
• a rotor disposed in opposition to the stack-type stator with an air gap above the stack-type stator,
• wherein the stack-type stator comprises:
• a multi-layer substrate having a first through hole;
• a coil pattern formed on the respective substrates of the multi-layer substrate and to surround the first through hole and to form a plurality of turns;
• a stator yoke disposed at a lower portion of the multi-layer substrate and having a second through hole at a position corresponding to the first through hole;
• and
• a divided core having one side protruding above the coil pattern formed on the uppermost layer of the multi-layer substrate and the other side being coupled to the second through hole of the stator yoke through the first through hole of the multi-layer substrate,
• wherein the base plate is a stator yoke, and
• wherein the first and second through holes are arranged in a radial direction in a rectangular shape, the divided core is formed of a plurality of iron pieces laminated along the radial direction, and the plurality of iron pieces each comprises one side protruding from both ends thereof in a round shape to form a shoe portion, and the other side protruding in a rectangular shape to form a tooth portion.