WO2011055922A2 - Molded motor - Google Patents

Molded motor Download PDF

Info

Publication number
WO2011055922A2
WO2011055922A2 PCT/KR2010/007309 KR2010007309W WO2011055922A2 WO 2011055922 A2 WO2011055922 A2 WO 2011055922A2 KR 2010007309 W KR2010007309 W KR 2010007309W WO 2011055922 A2 WO2011055922 A2 WO 2011055922A2
Authority
WO
WIPO (PCT)
Prior art keywords
circuit board
rotor
stator core
coils
resin material
Prior art date
Application number
PCT/KR2010/007309
Other languages
French (fr)
Other versions
WO2011055922A3 (en
Inventor
Jeong Cheol Jang
Gyeong Su Park
Original Assignee
New Motech Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020090105754A external-priority patent/KR101070963B1/en
Priority claimed from KR1020090105757A external-priority patent/KR101104009B1/en
Application filed by New Motech Co., Ltd. filed Critical New Motech Co., Ltd.
Publication of WO2011055922A2 publication Critical patent/WO2011055922A2/en
Publication of WO2011055922A3 publication Critical patent/WO2011055922A3/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
    • H02K2211/03—Machines characterised by circuit boards, e.g. pcb
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements

Definitions

  • the present invention relates to a molded motor, and more particularly, to a molded motor that has a structure in which a circuit board has a left and right symmetrical shape to obtain a compact size and reduce a quantity of resin material used for molding and sensors for sensing the magnetic poles of a rotor are lowered in mounting positions such that the sensors are directly mounted on the circuit board to remove the need for supports used for supporting the sensors, thereby allowing the circuit board to be easily manufactured.
  • a molded motor largely includes a stator assembly formed by molding a resin material along an outer circumference of a stator core on which coils are wound to have a hollow portion and a rotor insertedly mounted into the hollow portion of the stator assembly.
  • the molded motor prevents water from entering the interior of the stator assembly, thereby avoiding the corrosion of the stator core.
  • the resin material molded for the stator assembly is made of a thermosetting resin having a low molding temperature, thereby giving no influence to a circuit board and mounting elements disposed thereon.
  • FIG.1 is a perspective view showing the outer appearance of a general molded motor
  • FIG.2 is a sectional view showing the general molded motor.
  • the molded motor includes a stator assembly 1 molded out of thermosetting resin to form a body, a rotor 2 adapted to be inserted into a hollow portion of the stator assembly 1, and upper and lower bearing caps 3a and 3b adapted to be coupled to both sides of the hollow portion of the stator assembly 1 so as to cover upper and lower bearings (not shown) rotatably supporting a rotor shaft 2a of the rotor 2.
  • the stator assembly 1 includes a stator core 1a made by laminating the stacked layers of steel plates having teeth protruded annularly inwardly, an insulator 1b adapted to cover the stator core 1a for insulation, coils (not shown) adapted to be wound on the teeth of the stator core 1a, a circuit board 1c adapted to mount elements for controlling currents applied to the coils thereon so as to control the starting and rotating speed of the rotor 2 and to mount sensors 1c-2 attached on the top portions of supporters thereon, and a resin material 1d adapted to surroundingly mold an assembly of the stator core 1a, the coils and the circuit board 1c.
  • FIGS.3 and 4 show the plan and side views of the circuit board 1c constituting the stator assembly 1.
  • the circuit board 1c has a through hole H formed to pass through the center thereof, a plurality of supports 1c-1 fixedly arranged to be equally spaced apart from each other along the through hole H, and the sensor 1c-2 mounted on each of the plurality of supports 1c-1 so as to sense the magnetic poles of the rotor 2.
  • the circuit board 1c has a terminal 1c-3 disposed on a terminal connection portion S1 protruded to one side thereof for the connection to an external terminal (not shown) in such a manner as to be connected to a circuit provided on the circuit board 1c, and it has control elements 1c-4 mounted on the top portion of an element mounting portion S2 protruded laterally from one side thereof.
  • the molding range should be extended to the portion corresponding to the element mounting portion S2 disposed at one side of the terminal connection portion S1, such that a quantity of the resin material 1d consumed is increased to raise the manufacturing cost.
  • the supports 1c-1 should be additionally manufactured to raise the mounting positions of the sensors 1c-2 such that the magnetic poles of the rotor 2 can be sensed through the sensors 1c-2 from the sides of the rotor 2. After the sensors 1c-2 are mounted on the supports 1c-1, thus, the supports 1c-1 should be attached on the circuit board 1c, thereby making the manufacturing process of the circuit board 1c more complicated and raising the manufacturing cost by the additional manufacturing and attaching processes of the supports 1c-1.
  • FIGS.5 and 6 are perspective and sectional views showing a portion wherein the terminal 1c-3 is exposed to one side of the resin material 1d in the conventional molded motor.
  • the terminal 1c-3 is protrudedly exposed to the outside of the resin material 1d in such a manner as to be connected to the external terminal, and gaps G may be formed at a portion where the resin material 1d and the terminal 1c-3 are connected, such that water enters the gaps G.
  • the present invention has been made in view of the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a molded motor that has a structure in which a circuit board has a left and right symmetrical shape, without having any element mounting area thereon, thereby obtaining a compact size and reducing a quantity of resin used for molding.
  • a molded motor including: a stator assembly having a hollow portion; bearings disposed at both side inlets of the hollow portion of the stator assembly; and a rotor having a rotor shaft supported by means of the bearings in such a manner as to be inserted into the hollow portion of the stator assembly, wherein the stator assembly includes: a stator core made by laminating the stacked layers of steel plates and having teeth protruded annularly inwardly; an insulator adapted to cover the stator core for insulation; coils adapted to be wound on the teeth of the stator core; a circuit board 1c adapted to mount an element for controlling currents applied to the coils thereon so as to control the starting and rotating speed of the rotor and to mount sensors for sensing the magnetic poles of the rotor, the circuit board having a through hole formed at the center thereof and a terminal connection portion disposed at one side thereof so as to allow a terminal protruded
  • the sensors are mounted on the circuit board in such a manner as to be positioned over or under the magnetic poles of the rotor inserted into the hollow portion of the stator assembly.
  • gaps formed between the terminal exposed protrudedly from one side of the resin material and the resin material are sealed.
  • a molded motor including: a stator assembly having a hollow portion; bearings disposed at both side inlets of the hollow portion of the stator assembly; and a rotor having a rotor shaft supported by means of the bearings in such a manner as to be inserted into the hollow portion of the stator assembly, wherein the stator assembly includes: a stator core made by laminating the stacked layers of steel plates and having teeth protruded annularly inwardly; an insulator adapted to cover the stator core for insulation; coils adapted to be wound on the teeth of the stator core; a circuit board adapted to mount an element for controlling currents applied to the coils thereon so as to control the starting and rotating speed of the rotor and to mount sensors for sensing the magnetic poles of the rotor; and a resin material adapted to surroundingly mold the assembly of the stator core, the insulator, the coils and the circuit board, such that the circuit board is
  • the molded motor according to the present invention has the following advantages:
  • the circuit board has a left and right symmetrical shape, without having any element mounting area thereon, thereby obtaining a compact size and reducing a quantity of resin used for molding.
  • the sensors for sensing the magnetic poles of the rotor are lowered in position in such a manner as to be directly mounted on the circuit board, without having any supports for supporting the sensors, thereby allowing the circuit board to be easily manufactured.
  • the sealing member is formed along the connection line between the terminal protrudedly exposed to the outside of the resin material and the resin material, thereby preventing water from being penetrated through the gaps formed between the terminal and the resin material.
  • FIG.1 is an exploded perspective view showing a conventional molded motor.
  • FIG.2 is a sectional view showing the conventional molded motor.
  • FIG.3 is a plan view showing a circuit board of a stator assembly in the conventional molded motor.
  • FIG.4 is a side view showing the circuit board of the stator assembly in the conventional molded motor.
  • FIG.5 is a perspective view showing a portion of the stator assembly in the conventional molded motor wherein a terminal is exposed to the outside.
  • FIG.6 is a sectional view showing the portion of the stator assembly in the conventional molded motor wherein the terminal is exposed to the outside.
  • FIG.7 is an exploded perspective view showing a molded motor according to the present invention.
  • FIG.8 is a sectional view showing the molded motor according to the present invention.
  • FIG.9 is a plan view showing a circuit board of a stator assembly in the molded motor according to the present invention.
  • FIG.10 is a side view showing the circuit board of the stator assembly in the molded motor according to the present invention.
  • FIG.11 is a perspective view showing a portion of the stator assembly in the molded motor according to the present invention wherein a terminal is exposed to the outside.
  • FIG.12 is a sectional view showing the portion of the stator assembly in the molded motor according to the present invention wherein the terminal is exposed to the outside.
  • FIGS.7 and 8 are exploded perspective and sectional views showing a molded motor according to the present invention
  • FIGS.9 and 10 are plan and side views showing a circuit board of a stator assembly in the molded motor according to the present invention
  • FIGS.11 and 12 are perspective and sectional views showing a portion of the stator assembly in the molded motor according to the present invention wherein a terminal is exposed to the outside.
  • the molded motor according to the present invention includes a stator assembly 10, a rotor 20, and bearing caps 30 and 30’.
  • the stator assembly 10 has a hollow body made by molding an assembly of a stator core 11, an insulator 12, coils (not shown) and a circuit board 13 to a resin material 14.
  • the stator core 11 of the stator assembly 10 is formed by laminating the stacked layers of steel plates and has a plurality of teeth protruded annularly inwardly.
  • the insulator 12 serves to cover the stator core 11 through the connection to the stator core 11 so as to insulate the stator core 11 from the coils and is formed through resin injection molding.
  • the coils serve to generate the magnetic forces from the magnetic poles of the rotor 20 to produce the force rotating the rotor 20 and receive electric currents from an element disposed on the circuit board 13 to produce a magnetic field.
  • the coils are wound on the teeth of the stator core 11.
  • the circuit board 13 is coupled to one side of the insulator 12 and mounts an element 13c for controlling the electric currents applied to the coils so as to control the starting and rotating speed of the rotor 20 and sensors 13b for sensing the magnetic poles of magnets 21 of the rotor 20 thereon.
  • the circuit board 13 has a through hole 13a formed at the center thereof and a terminal connection portion S formed at one side thereof in such a manner as to permit a terminal 13d to be connected protrudedly thereto. Accordingly, the circuit board 13 has a left and right symmetrical structure with respect to the terminal connection portion S. According to the present invention, since only the terminal connection portion S is protruded from one side of the circuit board 13, the whole volume of the circuit board 13 is decreased to reduce the resin material 14 for molding in quantity.
  • the sensors 13b are mounted on the circuit board 13 in such a manner as to be arranged to be equally spaced apart from each other along the through hole 13a, and according to the present invention, the sensors 13b are mounted directly on the circuit board 13 in such a manner as to be positioned over or under the magnetic poles of the magnets 21 of the rotor 20 inserted into a hollow portion 10’ of the stator assembly 10.
  • the sensors 13b are positioned over the top ends of the magnets 21 of the rotor 20.
  • the sensors 13b are mounted directly on the circuit board 13, without having any supports, thereby easily manufacturing the circuit board 13 and lowering the manufacturing cost.
  • the resin material 14 is applied to surroundingly mold the assembly.
  • the stator assembly 10 molded out of the resin material 14 is formed to have the hollow portion 10’ at the center thereof, into which the rotor 20 is insertedly disposed.
  • the terminal 13d for connection to the external terminal (not shown) is protrudedly exposed to one side of the resin material 14.
  • a sealing member 15 such as silicone, resin, adhesive, or the like. The formation of the sealing member 15 enables the gaps G formed upon the connection between the terminal 13d and the resin material 14 to be completely closed.
  • the rotor 20 includes the magnets 21 having the magnetic poles formed therearound and a rotor shaft 22 coupled to the magnets 21 in such a manner as to be penetrated vertically therethrough, and the rotor 20 is supported by means of the bearing caps 30 and 30’ such that the magnets 21 are mounted to be positioned at the interior of the hollow portion 10’ of the stator assembly 10.
  • the bearing caps 30 and 30’ are disposed to close the both side inlets of the hollow portion 10’ of the stator assembly 10, and thus, the rotor shaft 22 of the rotor 20 is supported by means of the bearings provided in the interiors of the bearing caps 30 and 30’.
  • the molded motor that has a structure in which the circuit board has a left and right symmetrical shape, without having any element mounting area thereon, thereby obtaining a compact size and reducing a quantity of resin used for molding.

Abstract

The present invention relates to a molded motor including a stator assembly having a stator core made by laminating the stacked layers of steel plates and having teeth protruded annularly inwardly, an insulator adapted to cover the stator core for insulation, coils adapted to be wound on the teeth of the stator core, a circuit board adapted to mount an element for controlling currents applied to the coils thereon so as to control the starting and rotating speed of a rotor and to mount sensors for sensing the magnetic poles of the rotor, the circuit board having a through hole formed at the center thereof and a terminal connection portion disposed at one side thereof so as to allow a terminal protrudedly connected thereto, and a resin material adapted to surroundingly mold the assembly of the stator core, the insulator, the coils and the circuit board.

Description

MOLDED MOTOR
The present invention relates to a molded motor, and more particularly, to a molded motor that has a structure in which a circuit board has a left and right symmetrical shape to obtain a compact size and reduce a quantity of resin material used for molding and sensors for sensing the magnetic poles of a rotor are lowered in mounting positions such that the sensors are directly mounted on the circuit board to remove the need for supports used for supporting the sensors, thereby allowing the circuit board to be easily manufactured.
A molded motor largely includes a stator assembly formed by molding a resin material along an outer circumference of a stator core on which coils are wound to have a hollow portion and a rotor insertedly mounted into the hollow portion of the stator assembly. The molded motor prevents water from entering the interior of the stator assembly, thereby avoiding the corrosion of the stator core. Typically, the resin material molded for the stator assembly is made of a thermosetting resin having a low molding temperature, thereby giving no influence to a circuit board and mounting elements disposed thereon.
FIG.1 is a perspective view showing the outer appearance of a general molded motor, and FIG.2 is a sectional view showing the general molded motor. In the drawings, the molded motor includes a stator assembly 1 molded out of thermosetting resin to form a body, a rotor 2 adapted to be inserted into a hollow portion of the stator assembly 1, and upper and lower bearing caps 3a and 3b adapted to be coupled to both sides of the hollow portion of the stator assembly 1 so as to cover upper and lower bearings (not shown) rotatably supporting a rotor shaft 2a of the rotor 2. The stator assembly 1 includes a stator core 1a made by laminating the stacked layers of steel plates having teeth protruded annularly inwardly, an insulator 1b adapted to cover the stator core 1a for insulation, coils (not shown) adapted to be wound on the teeth of the stator core 1a, a circuit board 1c adapted to mount elements for controlling currents applied to the coils thereon so as to control the starting and rotating speed of the rotor 2 and to mount sensors 1c-2 attached on the top portions of supporters thereon, and a resin material 1d adapted to surroundingly mold an assembly of the stator core 1a, the coils and the circuit board 1c.
In the meantime, FIGS.3 and 4 show the plan and side views of the circuit board 1c constituting the stator assembly 1. Referring to the drawings, the circuit board 1c has a through hole H formed to pass through the center thereof, a plurality of supports 1c-1 fixedly arranged to be equally spaced apart from each other along the through hole H, and the sensor 1c-2 mounted on each of the plurality of supports 1c-1 so as to sense the magnetic poles of the rotor 2. Also, the circuit board 1c has a terminal 1c-3 disposed on a terminal connection portion S1 protruded to one side thereof for the connection to an external terminal (not shown) in such a manner as to be connected to a circuit provided on the circuit board 1c, and it has control elements 1c-4 mounted on the top portion of an element mounting portion S2 protruded laterally from one side thereof.
In the case of the conventional molded motor having the terminal connection portion S1 and the element mounting portion S2, so as to carry out the molding out of the resin material 1d, the molding range should be extended to the portion corresponding to the element mounting portion S2 disposed at one side of the terminal connection portion S1, such that a quantity of the resin material 1d consumed is increased to raise the manufacturing cost.
In the case of the conventional molded motor, further, the supports 1c-1 should be additionally manufactured to raise the mounting positions of the sensors 1c-2 such that the magnetic poles of the rotor 2 can be sensed through the sensors 1c-2 from the sides of the rotor 2. After the sensors 1c-2 are mounted on the supports 1c-1, thus, the supports 1c-1 should be attached on the circuit board 1c, thereby making the manufacturing process of the circuit board 1c more complicated and raising the manufacturing cost by the additional manufacturing and attaching processes of the supports 1c-1.
On the other hand, FIGS.5 and 6 are perspective and sectional views showing a portion wherein the terminal 1c-3 is exposed to one side of the resin material 1d in the conventional molded motor. The terminal 1c-3 is protrudedly exposed to the outside of the resin material 1d in such a manner as to be connected to the external terminal, and gaps G may be formed at a portion where the resin material 1d and the terminal 1c-3 are connected, such that water enters the gaps G.
Accordingly, the present invention has been made in view of the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a molded motor that has a structure in which a circuit board has a left and right symmetrical shape, without having any element mounting area thereon, thereby obtaining a compact size and reducing a quantity of resin used for molding.
It is another object of the present invention to provide a molded motor that has a structure in which sensors for sensing the magnetic poles of a rotor are lowered in mounting positions in such a manner as to be directly mounted on the circuit board, without having any supports for supporting the sensors, thereby allowing the circuit board to be easily manufactured.
It is still another object of the present invention to provide a molded motor that is configured wherein a sealing member is formed along a connection line between a terminal protrudedly exposed to the outside of a resin material and the resin material, thereby preventing water from being penetrated through the gaps formed between the terminal and the resin material.
The above objects and other objects of the present invention will be easily achieved by a preferred embodiment of the present invention as will be described below.
To accomplish the above objects, according to an aspect of the present invention, there is provided a molded motor including: a stator assembly having a hollow portion; bearings disposed at both side inlets of the hollow portion of the stator assembly; and a rotor having a rotor shaft supported by means of the bearings in such a manner as to be inserted into the hollow portion of the stator assembly, wherein the stator assembly includes: a stator core made by laminating the stacked layers of steel plates and having teeth protruded annularly inwardly; an insulator adapted to cover the stator core for insulation; coils adapted to be wound on the teeth of the stator core; a circuit board 1c adapted to mount an element for controlling currents applied to the coils thereon so as to control the starting and rotating speed of the rotor and to mount sensors for sensing the magnetic poles of the rotor, the circuit board having a through hole formed at the center thereof and a terminal connection portion disposed at one side thereof so as to allow a terminal protrudedly connected thereto; and a resin material adapted to surroundingly mold the assembly of the stator core, the insulator, the coils and the circuit board.
According to the present invention, desirably, the sensors are mounted on the circuit board in such a manner as to be positioned over or under the magnetic poles of the rotor inserted into the hollow portion of the stator assembly.
According to the present invention, desirably, gaps formed between the terminal exposed protrudedly from one side of the resin material and the resin material are sealed.
To accomplish the above objects, according to another aspect of the present invention, there is provided a molded motor including: a stator assembly having a hollow portion; bearings disposed at both side inlets of the hollow portion of the stator assembly; and a rotor having a rotor shaft supported by means of the bearings in such a manner as to be inserted into the hollow portion of the stator assembly, wherein the stator assembly includes: a stator core made by laminating the stacked layers of steel plates and having teeth protruded annularly inwardly; an insulator adapted to cover the stator core for insulation; coils adapted to be wound on the teeth of the stator core; a circuit board adapted to mount an element for controlling currents applied to the coils thereon so as to control the starting and rotating speed of the rotor and to mount sensors for sensing the magnetic poles of the rotor; and a resin material adapted to surroundingly mold the assembly of the stator core, the insulator, the coils and the circuit board, such that the circuit board is connected to a terminal exposed protrudedly from one side of the resin material and gaps formed between the exposed terminal and the resin material are sealed.
Under the above-mentioned structure, the molded motor according to the present invention has the following advantages:
Firstly, the circuit board has a left and right symmetrical shape, without having any element mounting area thereon, thereby obtaining a compact size and reducing a quantity of resin used for molding.
Secondly, the sensors for sensing the magnetic poles of the rotor are lowered in position in such a manner as to be directly mounted on the circuit board, without having any supports for supporting the sensors, thereby allowing the circuit board to be easily manufactured.
Thirdly, the sealing member is formed along the connection line between the terminal protrudedly exposed to the outside of the resin material and the resin material, thereby preventing water from being penetrated through the gaps formed between the terminal and the resin material.
FIG.1 is an exploded perspective view showing a conventional molded motor.
FIG.2 is a sectional view showing the conventional molded motor.
FIG.3 is a plan view showing a circuit board of a stator assembly in the conventional molded motor.
FIG.4 is a side view showing the circuit board of the stator assembly in the conventional molded motor.
FIG.5 is a perspective view showing a portion of the stator assembly in the conventional molded motor wherein a terminal is exposed to the outside.
FIG.6 is a sectional view showing the portion of the stator assembly in the conventional molded motor wherein the terminal is exposed to the outside.
FIG.7 is an exploded perspective view showing a molded motor according to the present invention.
FIG.8 is a sectional view showing the molded motor according to the present invention.
FIG.9 is a plan view showing a circuit board of a stator assembly in the molded motor according to the present invention.
FIG.10 is a side view showing the circuit board of the stator assembly in the molded motor according to the present invention.
FIG.11 is a perspective view showing a portion of the stator assembly in the molded motor according to the present invention wherein a terminal is exposed to the outside.
FIG.12 is a sectional view showing the portion of the stator assembly in the molded motor according to the present invention wherein the terminal is exposed to the outside.
Hereinafter, an explanation on a molded motor according to the present invention will be in detail given with reference to the attached drawings.
FIGS.7 and 8 are exploded perspective and sectional views showing a molded motor according to the present invention, FIGS.9 and 10 are plan and side views showing a circuit board of a stator assembly in the molded motor according to the present invention, and FIGS.11 and 12 are perspective and sectional views showing a portion of the stator assembly in the molded motor according to the present invention wherein a terminal is exposed to the outside.
Referring to FIGS.7 and 8, the molded motor according to the present invention includes a stator assembly 10, a rotor 20, and bearing caps 30 and 30’. The stator assembly 10 has a hollow body made by molding an assembly of a stator core 11, an insulator 12, coils (not shown) and a circuit board 13 to a resin material 14.
The stator core 11 of the stator assembly 10 is formed by laminating the stacked layers of steel plates and has a plurality of teeth protruded annularly inwardly. The insulator 12 serves to cover the stator core 11 through the connection to the stator core 11 so as to insulate the stator core 11 from the coils and is formed through resin injection molding. The coils serve to generate the magnetic forces from the magnetic poles of the rotor 20 to produce the force rotating the rotor 20 and receive electric currents from an element disposed on the circuit board 13 to produce a magnetic field. The coils are wound on the teeth of the stator core 11. The circuit board 13 is coupled to one side of the insulator 12 and mounts an element 13c for controlling the electric currents applied to the coils so as to control the starting and rotating speed of the rotor 20 and sensors 13b for sensing the magnetic poles of magnets 21 of the rotor 20 thereon. Referring to the drawings, the circuit board 13 has a through hole 13a formed at the center thereof and a terminal connection portion S formed at one side thereof in such a manner as to permit a terminal 13d to be connected protrudedly thereto. Accordingly, the circuit board 13 has a left and right symmetrical structure with respect to the terminal connection portion S. According to the present invention, since only the terminal connection portion S is protruded from one side of the circuit board 13, the whole volume of the circuit board 13 is decreased to reduce the resin material 14 for molding in quantity.
In the meantime, the sensors 13b are mounted on the circuit board 13 in such a manner as to be arranged to be equally spaced apart from each other along the through hole 13a, and according to the present invention, the sensors 13b are mounted directly on the circuit board 13 in such a manner as to be positioned over or under the magnetic poles of the magnets 21 of the rotor 20 inserted into a hollow portion 10’ of the stator assembly 10. In the drawings, the sensors 13b are positioned over the top ends of the magnets 21 of the rotor 20. According to the present invention, the sensors 13b are mounted directly on the circuit board 13, without having any supports, thereby easily manufacturing the circuit board 13 and lowering the manufacturing cost.
In a state where the assembly of the stator core 11, the insulator 12, the coils and the circuit board 13 is inserted, the resin material 14 is applied to surroundingly mold the assembly. The stator assembly 10 molded out of the resin material 14 is formed to have the hollow portion 10’ at the center thereof, into which the rotor 20 is insertedly disposed.
On the other hand, in the state where the resin material 14 is formed, the terminal 13d for connection to the external terminal (not shown) is protrudedly exposed to one side of the resin material 14. According to the characteristics of the present invention, gaps G formed between the terminal 13d and the resin material 14 connected to each other are closed by means of a sealing member 15 such as silicone, resin, adhesive, or the like. The formation of the sealing member 15 enables the gaps G formed upon the connection between the terminal 13d and the resin material 14 to be completely closed.
The rotor 20 includes the magnets 21 having the magnetic poles formed therearound and a rotor shaft 22 coupled to the magnets 21 in such a manner as to be penetrated vertically therethrough, and the rotor 20 is supported by means of the bearing caps 30 and 30’ such that the magnets 21 are mounted to be positioned at the interior of the hollow portion 10’ of the stator assembly 10.
The bearing caps 30 and 30’ are disposed to close the both side inlets of the hollow portion 10’ of the stator assembly 10, and thus, the rotor shaft 22 of the rotor 20 is supported by means of the bearings provided in the interiors of the bearing caps 30 and 30’.
While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.
According to the present invention, there is provided the molded motor that has a structure in which the circuit board has a left and right symmetrical shape, without having any element mounting area thereon, thereby obtaining a compact size and reducing a quantity of resin used for molding.

Claims (4)

  1. A molded motor comprising:
    a stator assembly 10 having a hollow portion 10’;
    bearings disposed at both side inlets of the hollow portion 10’ of the stator assembly 10; and
    a rotor 20 having a rotor shaft 22 supported by means of the bearings in such a manner as to be inserted into the hollow portion 10’ of the stator assembly 10,
    wherein the stator assembly 10 comprises:
    a stator core 11 made by laminating the stacked layers of steel plates and having teeth protruded annularly inwardly;
    an insulator 12 adapted to cover the stator core 11 for insulation;
    coils adapted to be wound on the teeth of the stator core 11;
    a circuit board 13 adapted to mount an element 13c for controlling currents applied to the coils thereon so as to control the starting and rotating speed of the rotor 20 and to mount sensors 13b for sensing the magnetic poles of the rotor 20, the circuit board 13 having a through hole 13a formed at the center thereof and a terminal connection portion S disposed at one side thereof so as to allow a terminal 13d protrudedly connected thereto; and
    a resin material 14 adapted to surroundingly mold the assembly of the stator core 11, the insulator 12, the coils and the circuit board 13.
  2. The molded motor according to claim 1, wherein the sensors 13b are mounted on the circuit board 13 in such a manner as to be positioned over or under the magnetic poles of the rotor 20 inserted into the hollow portion 10’ of the stator assembly 10.
  3. The molded motor according to claim 1 or 2, wherein gaps G formed between the terminal 13d exposed protrudedly from one side of the resin material 14 and the resin material 14 are sealed.
  4. A molded motor comprising:
    a stator assembly 10 having a hollow portion 10’;
    bearings disposed at both side inlets of the hollow portion 10’ of the stator assembly 10; and
    a rotor 20 having a rotor shaft 22 supported by means of the bearings in such a manner as to be inserted into the hollow portion 10’ of the stator assembly 10,
    wherein the stator assembly 10 comprises:
    a stator core 11 made by laminating the stacked layers of steel plates and having teeth protruded annularly inwardly;
    an insulator 12 adapted to cover the stator core 11 for insulation;
    coils adapted to be wound on the teeth of the stator core 11;
    a circuit board 13 adapted to mount an element 13c for controlling currents applied to the coils thereon so as to control the starting and rotating speed of the rotor 20 and to mount sensors 13b for sensing the magnetic poles of the rotor 20; and
    a resin material 14 adapted to surroundingly mold the assembly of the stator core 11, the insulator 12, the coils and the circuit board 13, such that the circuit board 13 is connected to a terminal 13d exposed protrudedly from one side of the resin material 14, and gaps G formed between the exposed terminal 13d and the resin material 14 are sealed.
PCT/KR2010/007309 2009-11-04 2010-10-23 Molded motor WO2011055922A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2009-0105754 2009-11-04
KR1020090105754A KR101070963B1 (en) 2009-11-04 2009-11-04 Molded-type motor
KR1020090105757A KR101104009B1 (en) 2009-11-04 2009-11-04 Molded-type motor
KR10-2009-0105757 2009-11-04

Publications (2)

Publication Number Publication Date
WO2011055922A2 true WO2011055922A2 (en) 2011-05-12
WO2011055922A3 WO2011055922A3 (en) 2011-10-13

Family

ID=43970501

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2010/007309 WO2011055922A2 (en) 2009-11-04 2010-10-23 Molded motor

Country Status (1)

Country Link
WO (1) WO2011055922A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105637746A (en) * 2013-10-22 2016-06-01 三菱电机株式会社 Molded stator, molded electric motor, and air conditioner
CN105659476A (en) * 2013-10-24 2016-06-08 三菱电机株式会社 Stator, electric motor, and air conditioner
PL422414A1 (en) * 2017-07-31 2019-02-11 ABB Spółka z ograniczoną odpowiedzialnością Set of sensors for testing electric machines with housing made from plastics

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6002185A (en) * 1998-06-03 1999-12-14 Mitsubishi Denki Kabushiki Kaisha Molded motor
JP2001197706A (en) * 2000-01-17 2001-07-19 Nidec Shibaura Corp Molded motor with built-in circuit
JP2003319615A (en) * 2002-04-23 2003-11-07 Matsushita Electric Ind Co Ltd Mold type motor
JP2005261002A (en) * 2004-03-09 2005-09-22 Mitsubishi Electric Corp Stator of motor, manufacturing process of stator of motor, air conditioner, refrigerator and fan

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0851741A (en) * 1994-08-05 1996-02-20 Sanwa Chem Kk Molded motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6002185A (en) * 1998-06-03 1999-12-14 Mitsubishi Denki Kabushiki Kaisha Molded motor
JP2001197706A (en) * 2000-01-17 2001-07-19 Nidec Shibaura Corp Molded motor with built-in circuit
JP2003319615A (en) * 2002-04-23 2003-11-07 Matsushita Electric Ind Co Ltd Mold type motor
JP2005261002A (en) * 2004-03-09 2005-09-22 Mitsubishi Electric Corp Stator of motor, manufacturing process of stator of motor, air conditioner, refrigerator and fan

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105637746A (en) * 2013-10-22 2016-06-01 三菱电机株式会社 Molded stator, molded electric motor, and air conditioner
EP3062421A4 (en) * 2013-10-22 2017-07-05 Mitsubishi Electric Corporation Molded stator, molded electric motor, and air conditioner
US10084357B2 (en) 2013-10-22 2018-09-25 Mitsubishi Electric Corporation Molded stator, molded electric motor, and air conditioner
CN105659476A (en) * 2013-10-24 2016-06-08 三菱电机株式会社 Stator, electric motor, and air conditioner
EP3062423A4 (en) * 2013-10-24 2017-07-12 Mitsubishi Electric Corporation Stator, electric motor, and air conditioner
PL422414A1 (en) * 2017-07-31 2019-02-11 ABB Spółka z ograniczoną odpowiedzialnością Set of sensors for testing electric machines with housing made from plastics

Also Published As

Publication number Publication date
WO2011055922A3 (en) 2011-10-13

Similar Documents

Publication Publication Date Title
WO2011055920A2 (en) Stator for compressor motor
US7057318B2 (en) Electric motor
WO2011055921A2 (en) Fan motor for circulating cooled air
CN102957289B (en) Stator and the EPS motor with the stator
EP2162970B1 (en) Stator for aspiration motor, aspiration motor and in-car sensor using the same
US11843296B2 (en) Motor and air conditioner
CN1489880A (en) Electroacoustic transducer
WO2011055922A2 (en) Molded motor
JP2006034094A (en) Isolator of stator slot
ITTO950009A1 (en) IMPROVEMENTS TO BRUSHLESS MOTORS, IN PARTICULAR FOR DIRECT DRIVING OF THE WASHING MACHINE BASKET
WO2014084553A1 (en) Bldc motor for electrical equipment
CN104317032A (en) Miniature tilt-shift type optical anti-vibration voice coil motor structure facilitating production and assembling method
CN101577455B (en) A motor for a multi-stage circuit and a conductive wire connector thereof
CN106208530B (en) Motor with a stator having a stator core
WO2014042340A1 (en) Motor with hall sensor cover and waterproof cover
CN109417335A (en) Motor and pump installation
WO2014106983A1 (en) Fan motor
JPS6032534A (en) Small-sized motor
US7417342B2 (en) Holder for winding wires for stators of electric motors
WO2012141415A1 (en) Stator of motor and method for manufacturing the stator
JPS5849074A (en) Brushless motor
KR20010051577A (en) Magnetic assembly structure used for compact electric apparatus, method of fabricating the magnetic assembly structure, and compact electric apparatus adopting the magnetic assembly structure
WO2019151766A1 (en) Motor
CN1427526A (en) Motor
CN114876955A (en) Magnetic suspension bearing and compressor

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10828457

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10828457

Country of ref document: EP

Kind code of ref document: A2