KR101798919B1 - Rotating electric machine - Google Patents

Rotating electric machine Download PDF

Info

Publication number
KR101798919B1
KR101798919B1 KR1020160008951A KR20160008951A KR101798919B1 KR 101798919 B1 KR101798919 B1 KR 101798919B1 KR 1020160008951 A KR1020160008951 A KR 1020160008951A KR 20160008951 A KR20160008951 A KR 20160008951A KR 101798919 B1 KR101798919 B1 KR 101798919B1
Authority
KR
South Korea
Prior art keywords
permanent magnet
rotor
slip ring
magnetic sensor
rotating shaft
Prior art date
Application number
KR1020160008951A
Other languages
Korean (ko)
Other versions
KR20170088707A (en
Inventor
이주형
신승욱
손창수
민율홍
Original Assignee
엘지전자 주식회사
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
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020160008951A priority Critical patent/KR101798919B1/en
Priority to PCT/KR2016/005665 priority patent/WO2017131296A1/en
Priority to CN201690001530.0U priority patent/CN208707481U/en
Publication of KR20170088707A publication Critical patent/KR20170088707A/en
Application granted granted Critical
Publication of KR101798919B1 publication Critical patent/KR101798919B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/003—Structural associations of slip-rings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
    • G01R33/09—Magnetoresistive devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation

Abstract

The present invention relates to a rotating electrical machine, and more particularly, to a rotating electrical machine comprising: a rotor having a rotating shaft, a rotor core coupled to the rotating shaft, and a rotor coil wound around the rotor core; A slip ring coupled to the rotating shaft; A permanent magnet provided on the slip ring; And a magnetic sensor spaced apart from the permanent magnet to detect a rotational position of the permanent magnet. Accordingly, the turning radius of the permanent magnet can be reduced, the installation space can be reduced, the amount of the permanent magnet input can be reduced, and the manufacturing cost can be reduced.

Figure R1020160008951

Description

[0001] ROTATING ELECTRIC MACHINE [0002]

The present invention relates to a rotary electric machine.

As is well known, rotating electrical machines include an electric motor that converts electrical energy into mechanical energy and a generator that converts mechanical energy into electrical energy.

The rotating machine includes a stator and a rotor that rotates with respect to the stator.

The stator includes a stator core and a stator coil wound around the stator core.

The rotor includes a rotating shaft, a rotor core coupled to the rotating shaft, and a permanent magnet or a rotor coil coupled to the rotor core.

The electric machine having the rotor coil is provided with a power supply for the rotor coil so as to supply power to the rotor coil.

The power supply for the rotor coil includes a slip ring coupled to the rotating shaft and a brush that is in electrical contact with the slip ring.

 On the other hand, an inverter for controlling the rotation of the rotor is provided in a part of the rotating electrical machine.

The rotating electrical machine is provided with a rotor rotational position detecting device for detecting the rotational position of the rotor.

The rotor rotational position detecting device includes a permanent magnet and a magnetic sensor for sensing the magnetic field of the permanent magnet.

In such a conventional rotary electric machine, a sensing disk having a rotor or a permanent magnet (hereinafter referred to as "permanent magnet") or a ring-shaped The permanent magnets are provided, and a relatively large space is required for installation, which makes a compact configuration difficult.

In addition, since a plurality of permanent magnets are disposed on the sensing disk or a permanent magnet is formed in a ring shape, the input amount of the relatively expensive permanent magnet increases, resulting in an increase in cost.

In addition, there is a problem that the rotation radius of the sensing disk and the permanent magnet is relatively large, so that damage or shortening of life can be caused by centrifugal force during rotation.

In addition, it is not easy for the permanent magnet to be accurately disposed at a predetermined position, and there is a problem that the sensing reliability is hindered.

KR 10-0677242 B1 KR 20-0451423 Y1

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a rotary electric machine capable of reducing installation space and being compact in construction.

Another object of the present invention is to provide a rotary electric machine capable of reducing the amount of the permanent magnet input and thus reducing the manufacturing cost.

It is still another object of the present invention to provide a rotary electric machine capable of suppressing damage caused by the centrifugal force of a permanent magnet and / or a supporting structure of a permanent magnet.

It is still another object of the present invention to provide a rotating electrical machine in which permanent magnets can be accurately disposed at predetermined positions, thereby enhancing sensing reliability.

In order to achieve the above-mentioned object, the present invention is characterized by comprising: a frame; A stator supported by the frame; A rotor having a rotating shaft, a rotor core coupled to the rotating shaft, and a rotor coil wound around the rotor core, the rotor having a relative motion with respect to the stator; A slip ring coupled to the rotating shaft; A permanent magnet provided on the slip ring; And a magnetic sensor spaced apart from the permanent magnet to detect a rotational position of the permanent magnet.

In an embodiment, the slip ring includes: a body having one end of the rotation shaft received therein; A plurality of electrical conductors spaced from one another around the body; And a permanent magnet coupling part formed on one side of the body so that the permanent magnet can be coupled with the permanent magnet coupling part.

In an embodiment, the permanent magnet coupling portion may be formed at the end of the body along the axial direction of the rotary shaft.

In an embodiment, the permanent magnets and the permanent magnet coupling portions may be formed in a single number, respectively.

In an embodiment, the magnetic sensor may be spaced apart from the permanent magnet along the axial direction.

In an embodiment, the permanent magnet coupling portion may be formed to be recessed along an axial direction at an end portion of the body.

In an embodiment, a display unit may be provided on one side of the permanent magnet coupling unit to indicate the polarity of the rotor coil.

In an embodiment, the magnetic sensor may be configured to be spaced from the permanent magnet by 2.3 to 3.5 mm along the axial direction.

In an embodiment, an inverter may be provided on one side along the axial direction of the rotary shaft.

In an embodiment, the magnetic sensor may be provided on a printed circuit board of the inverter.

In one embodiment of the present invention, the other end of the body has a plurality of legs extending along the axial direction of the rotary shaft, one end of each leg is electrically connected to each of the conductive rings, And a connecting member electrically connected to the rotor coil may be provided.

In an embodiment, a coupling portion for coupling with the rotor coil may be formed at an end of each connecting member.

In an embodiment, each of the engaging portions may be formed to be bent so as to cover an end portion of a lead wire of the rotor coil.

In an embodiment, each of the engaging portions may be configured to be pressed and plastically deformed so as to be closely contacted with the lead wire after the lead wire of the rotor coil is inserted.

In an embodiment, the magnetic sensor may be an AMR sensor having an anisotropic magnetoresistive element.

In an embodiment, the permanent magnet coupling portion may be formed along a circumferential direction of the body.

In the embodiment, the permanent magnet has a circular ring shape, and the permanent magnet coupling portion cuts the outer diameter of the body so as to be inserted along the axial direction so as to be reduced in the radial direction so that the inner diameter of the permanent magnet As shown in Fig.

In an embodiment, the permanent magnet coupling portion may be provided with a permanent magnet fixing member for preventing the permanent magnet from moving in the axial direction.

In an embodiment, the magnetic sensor may be disposed to be spaced apart from the permanent magnet coupling portion along the radial direction of the body.

In an embodiment, an inverter is provided on one side along the axial direction of the rotating shaft, and the magnetic sensor may be provided on a supporting substrate for supporting the components of the inverter.

As described above, according to the embodiment of the present invention, since the permanent magnet coupling portion is provided in the slip ring coupled to the rotary shaft of the rotor, the installation space can be reduced and a compact configuration is possible.

In addition, since the permanent magnet coupling portion is formed at the end of the slip ring, damage to the permanent magnet due to the centrifugal force and / or damage to the structure supporting the permanent magnet can be suppressed.

Further, by forming the permanent magnets and the permanent magnet coupling portions in a single number, the amount of use (input amount) of the permanent magnets can be reduced.

Further, since the permanent magnet coupling portion is formed on the slip ring, the permanent magnet can be disposed relatively accurately at a predetermined position, compared with a case where a new structure is added for supporting the permanent magnet, and the detection reliability can be enhanced .

In addition, since a new structure for coupling permanent magnets is not added, fabrication and assembly can be facilitated, and an increase in manufacturing cost can be suppressed.

1 is a cross-sectional view of a rotating electric machine according to an embodiment of the present invention,
Fig. 2 is a cross-sectional view of the coupled state of the rotation shaft and the slip ring of Fig. 1,
Fig. 3 is a perspective view of the slip ring of Fig. 1,
Figure 4 is a side view of the slip ring of Figure 3,
Fig. 5 is a bottom view of Fig. 3,
Fig. 6 is a plan view of Fig. 3,
7 is a view showing the state before the permanent magnets of FIG. 6 are engaged,
FIG. 8 is a partial cross-sectional view of FIG. 7,
Fig. 9 is an enlarged view of the main part of Fig. 1,
FIGS. 10 and 11 are views for explaining the operation of the permanent magnet and the magnetic sensor of FIG. 9,
12 is a cross-sectional view of a rotating electric machine according to another embodiment of the present invention,
13 is an enlarged view of the main part of Fig. 12,
14 is a side view of Fig.

Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings. In this specification, the same or similar reference numerals are given to the same or similar components in different embodiments, and the description thereof is replaced with the first explanation. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. In addition, it should be noted that the attached drawings are only for easy understanding of the embodiments disclosed in the present specification, and should not be construed as limiting the technical idea disclosed in the present specification by the attached drawings.

1, a rotating electric machine according to an embodiment of the present invention includes a frame 110; A stator 130 supported by the frame 110; A rotor 160 having a rotating shaft 161, a rotor core 181 coupled to the rotating shaft 161 and a rotor coil 181 wound around the rotor core 181 and moving relative to the stator 130, ; A slip ring 260a coupled to the rotation shaft 161; A permanent magnet 220 provided on the slip ring 260a; And a magnetic sensor 230 spaced apart from the permanent magnet 220 to detect a rotational position of the permanent magnet 220.

The frame 110 may be configured to be coupled to both ends of the stator 130, for example.

The frame 110 may include a first frame 112 and a second frame 114 which are coupled to both sides of the stator 130 along the axial direction, for example.

The stator 130 may include a stator core 131 and a stator coil 141 wound around the stator core 131.

In the stator core 131, for example, a rotor accommodating hole 134 in which the rotor 160 is accommodated may be formed.

The stator core 131 may have a plurality of slots 136 and teeth 138 around the rotor receiving hole 134.

The stator core 131 may be formed by inserting and stacking a plurality of electric steel plates 132 having the rotor accommodating hole 134, the slots 136, and the teeth 138.

The rotor 160 may include a rotating shaft 161, a rotor core 181 rotating around the rotating shaft 161, and a rotor coil 181 wound around the rotor core 181.

A shaft hole (174) into which the rotation shaft (161) is inserted may be provided at the center of the rotor core (181).

The rotor core 181 may be provided with a plurality of slots 176 and teeth 178 around the shaft hole 174.

The rotor core 181 may be formed by insulating lamination of a plurality of electrical steel plates 172 provided with the shaft hole 174, the slots 176 and the teeth 178, for example.

The rotary shaft 161 can be rotatably supported on both sides by a bearing 117.

The frame 110 may include a bearing coupling portion 115 to which the bearings 117 are coupled, respectively.

A pulley 165 may be provided at one end of the rotating shaft 161.

The pulley 165 may be connected to the pulley of the engine of the vehicle by a power transmission belt, for example, although not shown in the drawings.

Thus, the rotating electrical machine of the present embodiment can function as a generator that receives driving force from the engine of the vehicle and produces electric energy upon rotation.

Further, the rotating electric machine of the present embodiment can function as a starter or a starter motor that rotates and drives the engine of the vehicle when it is rotated by receiving power from a battery of the vehicle, for example.

The rotor 160 may include, for example, a fan 190 for promoting the movement of air during rotation.

The fan 190 may include a first fan 192 and a second fan 194 provided on both sides of the rotor 160.

Here, the first fan 192 and the second fan 194 may be configured to have different blowing capabilities, for example.

More specifically, for example, the second fan 194 may be configured to have a greater blowing capacity than the first fan 192.

More specifically, for example, the second fan 194 may be configured to have a larger size blade than the size of the blade of the first fan 194.

The rotating electric machine of this embodiment may be configured with an inverter 240. [

The inverter 240 includes, for example, an inverter case 242 for forming a housing space therein, a printed circuit board 245 having a control program, And a supporting substrate 247 having a plurality of switching elements 248 called so-called IGBTs.

The inverter case 242 may be coupled to the second frame 114, for example.

Meanwhile, the rotating electrical machine of the present embodiment may be provided with a rotor coil power supply unit for supplying power to the rotor coil 181.

The rotor coil power supply unit includes, for example, a slip ring 260a coupled to the rotation shaft 161; And a brush (not shown) in electrical contact with the slip ring 260a.

As shown in FIGS. 2 and 3, the slip ring 260a includes a body 262 having one end of the rotation shaft 161 received therein; A plurality of conductor rings (271) formed to be spaced apart from each other around the body (262) by electrical conductors; And a permanent magnet coupling part 270 formed on one side of the body 262 so that the permanent magnet 220 can be coupled thereto.

The body 262 may be formed of, for example, an electrically insulating member.

The body 262 may be made of, for example, engineering plastic called polyphenylene sulfide (PPS).

For example, the body 262 may have a rotation shaft receiving portion 264 formed therein to receive one end of the rotation shaft 161 therein.

The body 262 may have a cylindrical shape.

The plurality of conductive rings 271 may be formed.

Each of the conductor rings 271 may be formed as an electrical conductor in a ring shape.

Each of the conductor rings 271 may be formed of, for example, a copper (Cu) member.

The conductive rings 271 may be spaced from each other along the axial direction.

The conductive ring 271 may be supported so as to be insulated from each other by the body 262.

The conductive ring 271 may have a larger inner diameter than the inner diameter of the body 262.

The conductive ring 271 may have a larger outer diameter than the outer diameter of the body 262.

Accordingly, each of the conductor rings 271 may protrude outward along the radial direction as compared with the outer diameter surface of the body 262. [

Each of the conductive rings 271 is exposed to the outside and the inner diameter and a portion of both sides of the conductive ring 271 are inserted into the inside of the body 262 to be insulated by the body 262 have.

A pair of legs 280 extending toward the rotor coil 181 may be provided on one side of the body 262.

Each of the legs 280 may have a connecting member 282 connected to the conductor ring 271 at one end and connected to the rotor coil 181 at the other end.

Each of the connecting members 282 may be formed as a long plate-like member having a rectangular cross-section, as shown in Figs. 3 and 4, for example.

Each of the connecting members 282 may be formed of the same material as the conductive ring 271, for example.

Each of the connecting members 282 may be formed of a copper (Cu) member.

Each of the connecting members 282 may be integrally connected to the corresponding conductor ring 271 so as to be energized.

Each of the connecting members 282 can be welded to the conductive ring 271, for example.

Each of the legs 280 may extend in the axial direction from one end of the body 262 and extend radially outward to have a substantially L shape.

Each of the connecting members 282 may extend outside the end of the leg 280 and be exposed to the outside.

A connecting piece 285 may be provided at an end of each of the connecting members 282 so that each end of the rotor coil 181 can be energized.

Each of the connecting pieces 285 may be formed in a curved cross-sectional shape with one side opened, for example, as shown in Figs.

Each of the connecting pieces 285 may be electrically connected to the end of the connecting member 282 at one end and may be spaced apart from the end of the connecting member 282 at the other end .

After the respective ends of the rotor coil 181 are inserted into the respective connecting pieces 285, the ends of the connecting piece 285 and the rotor coil 181 are pressed so as to be in close contact with each other, (E. G., Caulking) so as to maintain a predetermined thickness.

Meanwhile, a permanent magnet coupling part 270 may be formed on one side of the body 262.

The permanent magnet coupling part 270 may extend from one end of the body 262 along the axial direction.

The permanent magnet coupling part 270 may be formed at the end of the body 262. [

Accordingly, the size of the permanent magnets 220 is reduced to a size corresponding to the diameter of the rotation shaft 161, so that the amount of the permanent magnets 220 can be reduced, thereby reducing manufacturing costs.

In addition, since the permanent magnets 220 are not spaced along the radial direction of the rotation shaft 161, the radius of rotation can be reduced, and the installation space can be reduced, so that a compact configuration can be realized.

Since the permanent magnet 220 is disposed at the end of the rotation shaft 161, the permanent magnet 220 can be damaged by the centrifugal force during rotation and / or the structure for supporting the permanent magnet 220, The occurrence of damage to the magnet coupling portion 270 can be suppressed.

Further, since the permanent magnet 220 is configured to be coupled to the end of the slip ring 260a, the permanent magnet 220 can be accurately disposed at a predetermined assembly position with respect to the center of the rotation shaft 161, .

The permanent magnets 220 may be formed in a rectangular shape, for example.

In this embodiment, the case where the permanent magnets 220 are formed in the shape of a rectangular plate is illustrated, but this is merely an example, and may be configured to have a polygonal shape or a disc shape.

The permanent magnet coupling portion 270 may include an insertion groove 275 that is recessed along the axial direction so that the permanent magnet 220 can be received along the axial direction.

The permanent magnet coupling portion 270 may be formed to communicate with the rotation shaft receiving portion 264 through a through hole 277, for example.

A polarity indicating portion 266 may be formed around the insertion groove 275 of the permanent magnet coupling portion 270 to indicate the polarity of the rotor coil 181.

The polarity indicator 266 may be formed to correspond to the legs 280, respectively.

The polarity display unit 266 may be configured to include characters (e.g., +, -) indicating polarity.

7, an operation groove 367 may be provided around the insertion groove 275 of the permanent magnet coupling portion 270. The operation groove 367 may be a jig or a tool to which the tool is coupled, as shown in FIG.

As shown in FIGS. 7 and 8, at the corners of the permanent magnet coupling portion 270, the interference of the edges of the permanent magnets 220 is suppressed when the permanent magnets 220 are inserted The interference preventing portion 272 can be formed.

The interference preventing portion 272 may be formed in a cylindrical shape having a predetermined radius around the corner of the permanent magnet coupling portion 270, for example.

The four corners of the insertion groove 275 extend in communication with the respective interference preventing portions 272 so that the permanent magnets 220 are separated from the respective corners of the permanent magnets 220 when the permanent magnets 220 are coupled, The engagement of the permanent magnets 220 can be facilitated and damage to the corners of the permanent magnets 220 can be suppressed.

Meanwhile, a magnetic sensor 230 may be provided on one side of the permanent magnet coupling portion 270 to sense the magnetic field of the permanent magnet 220.

The magnetic sensor 230 may be disposed so as to be spaced apart from the permanent magnet 220 along the axial direction of the rotation shaft 161, for example, as shown in FIG.

The magnetic sensor 230 may be provided on the printed circuit board 245 of the inverter 240, for example.

The magnetic sensor 230 may be disposed at a distance of 2.0 to 3.8 mm from the surface of the permanent magnet 220, for example.

In this embodiment, the magnetic sensor 230 is disposed at a distance of 2.9 mm from the permanent magnet 220, but the gap may be appropriately adjusted within a range of 2.0 mm to 3.8 mm.

As shown in FIG. 10, the permanent magnets 220 may be configured to have different magnetic poles (N poles, S poles) along the plate surface direction.

For example, the permanent magnet 220 may be magnetized such that an upper side is an N pole and a lower side is an S pole.

Thus, the permanent magnets 220 can be formed in the upper and lower directions in the figure.

The magnetic sensor 230 is a so-called anisotropic magnetoresistive (AMR) type magnetoresistive device in which the resistance becomes maximum when the directions of current and magnetization (magnetic flux) in the ferromagnetic metal are parallel to each other, ) Effect using an anisotropic magnetoresistive transducer.

The magnetic sensor 230 may be configured to have a sensing surface parallel to the magnetic axis of the permanent magnet 220.

10 and 11, the center (x) of the permanent magnet 220 is disposed so as to correspond to the center (x) of the magnetic sensor 230, Can be rotated.

The resistance of the thin film changes as the magnetic axis (magnetic flux direction) of the permanent magnet 220 is changed in parallel or perpendicular to the flow of the current of the magnetic sensor 230 by the rotation of the rotation shaft 161 And outputs the detection signal to the outside as a detection signal.

The slip ring 260a can be coupled to the rotation shaft 161 so that the end of the rotation shaft 161 is inserted into the body 262 of the slip ring 260a.

A corresponding end of the rotor coil 181 is inserted into the connecting piece 285 of the leg 280 of the slip ring 260a and the connecting piece 285 is pressed to connect the connecting piece 285 and the rotor coil 181 are brought into close contact with each other and plastic deformed so as to maintain a close contact state.

The permanent magnet coupling part 270 of the slip ring 260a may be coated with an adhesive and then the permanent magnet 220 may be inserted and coupled.

At this time, the permanent magnet 220 confirms the polarity indication portion 266 around the permanent magnet coupling portion 270 before inserting the permanent magnet coupling portion 270, and detects the polarity direction of the rotor coil 181 (Magnetic flux direction) of the permanent magnets 220 may be arranged so as to be perpendicular to each other (for example, when the polarity display portion 266 is arranged in the left-right direction in the figure).

On the other hand, when operation is started and power is supplied to the stator coil 141 and the rotor coil 181, respectively, a magnetic field is formed by the stator coil 141 and the rotor coil 181, (Suction and / or repulsion), the rotor 160 can be rotated about the rotation shaft 161. [

When the rotation shaft 161 is rotated, the slip ring 260a is rotated and the upper magnetic sensor 230 is rotated by the rotation of the slip ring 260a due to the rotation of the slip ring 260a It is possible to detect a change in magnetoresistance according to the change of the magnetic axis of the magnet 220 and to output it as a sense signal to the outside.

Hereinafter, another embodiment of the present invention will be described with reference to Figs. 12 to 14. Fig.

The rotating electric machine of this embodiment includes a frame 110, as shown in the foregoing description and in Fig. 12; A stator 130 supported by the frame 110; A rotor 160 having a rotating shaft 161, a rotor core 181 coupled to the rotating shaft 161 and a rotor coil 181 wound around the rotor core 181 and moving relative to the stator 130, ; A slip ring 260b coupled to the rotation shaft 161; A permanent magnet 222 provided on the slip ring 260b; And a magnetic sensor 310 spaced apart from the permanent magnet 222 to detect the rotational position of the permanent magnet 222. [

The stator 130 may include a stator core 131 and a stator coil 141 wound around the stator core 131.

A rotor coil power supply unit for supplying power to the rotor coil 181 may be provided on one side of the rotation shaft 161.

The rotor coil power supply unit may include a slip ring 260b provided on the rotary shaft 161 and a brush (not shown) brought into electric contact with the slip ring 260b.

Meanwhile, the slip ring 260b may include a body 262 having one end of the rotation shaft 161 housed therein, for example, as shown in the foregoing description and FIG. 13; A plurality of conductor rings (271) formed to be spaced apart from each other around the body (262) by electrical conductors; And a permanent magnet coupling part 270 formed on one side of the body 262 to receive the permanent magnet 222.

The body 262 may be embodied as a cylindrical shape, for example, with an electrical insulating member.

The body 262 may have a cylindrical shape with one end thereof inserted into the rotary shaft 161 to be inserted therein.

The permanent magnet coupling part 270 may be formed on the outer surface of the body 262 so that the permanent magnet 222 can be inserted and coupled.

The permanent magnet 222 may be embodied as a circular ring, for example.

Thus, the size of the permanent magnet 222 can be reduced corresponding to the size of the slip ring 260b, so that the amount of the permanent magnet 222 can be reduced.

In addition, since the size of the turning radius of the permanent magnet 222 can be reduced, the installation space can be reduced and a compact configuration can be realized

In addition, since the size of the rotation radius of the permanent magnet 222 can be reduced, damage to the permanent magnet 222 due to the centrifugal force and damage to the structure for supporting the permanent magnet 222 can be suppressed.

The permanent magnet coupling portion 270 may be formed in consideration of the radial thickness of the permanent magnet 222. [

More specifically, for example, the permanent magnet 222 may have an outer diameter surface corresponding to the outer diameter surface of the body 262. [

The permanent magnets 222 may have the same outer diameter as the outer diameter of the body 262, for example.

The permanent magnet coupling portion 270 may be formed to have an outer diameter face 279 and a step 278 which are smaller than the outer diameter of the body 262 so as to contact the inner diameter face of the permanent magnet 222, As shown in FIG.

The permanent magnet coupling part 270 may have a reduced outer diameter as compared with the outer diameter of the body 262.

The permanent magnet coupling part 270 may be formed to be cut along the axial direction from the end of the body 262.

Accordingly, the permanent magnet 222 can be inserted and coupled along the axial direction from the end of the body 262.

The permanent magnet coupling part 270 may be provided with a permanent magnet fixing member 290 disposed to be in contact with one side of the permanent magnet 222 to restrict axial clearance of the permanent magnet 222.

The permanent magnet fixing member 290 may be integrally fixed to the permanent magnet coupling portion 270.

The permanent magnet fixing member 290 may be integrally joined to the permanent magnet coupling portion 270 by an adhesive, for example.

The permanent magnet fixing member 290 may be configured to be screwed with the permanent magnet coupling portion 270, for example.

In addition, the permanent magnet fixing member 290 may be fused to the permanent magnet coupling portion 270, for example.

In this embodiment, the case where the permanent magnet 222 is formed in a circular ring shape is illustrated, but it may be formed in an arc shape.

The permanent magnets 222 may be configured such that different magnetic poles are disposed along the circumferential direction.

A magnetic sensor 310 for sensing the magnetic field of the permanent magnet 222 may be provided on one side of the permanent magnet 222.

The magnetic sensor 310 may be a Hall sensor (Hall effect sensor) using a Hall effect in which a potential difference is generated in a direction perpendicular to a current in a conductor when a magnetic field is formed perpendicularly to the direction of the current, A Hall sensor 314, and the like.

The magnetic sensor 310 may include a plurality of hall sensors 314.

14, the magnetic sensor may include a substrate 312 and a plurality of Hall sensors 314 disposed on the substrate 312 to be spaced apart from each other.

The plurality of hall sensors 314 may be disposed on the same circumference of the permanent magnet 222 on the same arc.

The magnetic sensor 310 may be provided on the support substrate 247 of the inverter 240, for example.

The magnetic sensor 310 is not specifically shown in the drawing, but may be connected to the controller so as to be able to output a detection result.

The substrate 312 of the magnetic sensor 310 is connected to the Hall sensor 314 through a cable 315 connected to the hall sensor 314 in a signal transmission manner, And a connector 317 connected thereto.

The permanent magnet 222 is coupled to the permanent magnet coupling portion 270 of the body 262 of the slip ring 260b and the permanent magnet fixing member 290 can be integrally fixed .

The slip ring 260b is coupled to the end of the rotary shaft 161 and the ends of the rotor coil 181 are connected to the connecting piece 285 of the leg 280 of the slip ring 260b, (285), respectively.

The support substrate 247 of the inverter 240 is coupled to the slip ring 260b and the magnetic sensor 310 may be disposed around the permanent magnet 222.

When the operation is started and power is supplied to the stator coil 141 and the rotor coil 181, the stator coil 141 and the rotor coil 181 are rotated by the magnetic fluxes formed by the stator coil 141 and the rotor coil 181, May be rotated about the rotation axis 161. [

When the rotation shaft 161 is rotated, the slip ring 260b is rotated, and the magnetic sensor 310 senses the magnetic field of the permanent magnet 222 and outputs it as a detection signal to the outside.

The foregoing has been shown and described with respect to specific embodiments of the invention. However, the present invention may be embodied in various forms without departing from the spirit or essential characteristics thereof, so that the above-described embodiments should not be limited by the details of the detailed description.

Further, even when the embodiments not listed in the detailed description have been described, it should be interpreted broadly within the scope of the technical idea defined in the appended claims. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

110: frame 115: bearing coupling part
117: bearing 130: stator
131: stator core 132, 172:
141: stator coil 160: rotor
161: rotating shaft 171: rotor core
181: Rotor coil 190: Fan
192: first fan 194: second fan
220, 222: permanent magnet 230, 320: magnetic sensor
240: inverter 242: inverter case
245: printed circuit board 247: supporting substrate
248: switching element 260a, 260b: slip ring
262: Body 264:
266: polarity display section 267: operation groove
270: permanent magnet coupling portion 271: conductor ring
272: interference preventing portion 275: insertion groove
277: through hole 278: step
279: Outer surface 280: Leg
282: connecting member 285: connecting piece
290: permanent magnet fixing member 314: hall sensor
315: Cable 317: Connector

Claims (13)

frame;
A stator supported by the frame;
A rotor having a rotating shaft, a rotor core coupled to the rotating shaft, and a rotor coil wound around the rotor core, the rotor moving relative to the stator;
A slip ring coupled to the rotating shaft;
A permanent magnet provided on the slip ring; And
A magnetic sensor that is spaced apart from the permanent magnet to detect a rotational position of the permanent magnet;
Lt; / RTI >
Wherein the slip ring comprises:
A body having one end of the rotating shaft received therein;
A permanent magnet coupling part formed at an end of the body so as to be recessed along an axial direction of the rotary shaft so that the permanent magnet can be engaged; And
And an interference preventing portion formed to extend in a radial direction around the edge of the permanent magnet coupling portion to suppress interference between the edges of the permanent magnet. The method according to claim 1,
Wherein the slip ring comprises a plurality of conductor rings spaced from one another around the body by electrical conductors. delete 3. The method of claim 2,
Wherein the permanent magnets and the permanent magnet coupling portions are formed in a single number, respectively. 3. The method of claim 2,
Wherein the magnetic sensor is spaced apart from the permanent magnet along the axial direction. 6. The method of claim 5,
And a display unit for indicating the polarity of the rotor coil is provided on one side of the permanent magnet coupling unit. 6. The method of claim 5,
Wherein the magnetic sensor is disposed at a distance of 2.3 to 3.5 mm from the permanent magnet. 8. The method of claim 7,
An inverter is provided on one side along the axial direction of the rotary shaft,
Wherein the magnetic sensor is provided on a printed circuit board of the inverter. 3. The method of claim 2,
And a plurality of legs extending along the axial direction of the rotary shaft at the other end of the body,
Wherein one end of each of the legs is electrically connected to each of the conductor rings, and the other end of the legs is connected to the rotor coil so as to be energizable. 10. The method according to any one of claims 1, 2, and 4 to 9,
Wherein the magnetic sensor is an AMR sensor. delete delete delete
KR1020160008951A 2016-01-25 2016-01-25 Rotating electric machine KR101798919B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020160008951A KR101798919B1 (en) 2016-01-25 2016-01-25 Rotating electric machine
PCT/KR2016/005665 WO2017131296A1 (en) 2016-01-25 2016-05-27 Electric rotation machine
CN201690001530.0U CN208707481U (en) 2016-01-25 2016-05-27 Rotate electricapparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160008951A KR101798919B1 (en) 2016-01-25 2016-01-25 Rotating electric machine

Publications (2)

Publication Number Publication Date
KR20170088707A KR20170088707A (en) 2017-08-02
KR101798919B1 true KR101798919B1 (en) 2017-11-17

Family

ID=59398208

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160008951A KR101798919B1 (en) 2016-01-25 2016-01-25 Rotating electric machine

Country Status (3)

Country Link
KR (1) KR101798919B1 (en)
CN (1) CN208707481U (en)
WO (1) WO2017131296A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3091961A1 (en) * 2019-01-22 2020-07-24 Psa Automobiles Sa ROTATING COLLECTOR FOR A SPOOL ROTOR OF AN ELECTRIC MACHINE.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700103344A1 (en) * 2017-09-15 2019-03-15 Eldor Corp Spa ROTATING MANIFOLD FOR AN ELECTRIC MACHINE
DE102018218430A1 (en) * 2018-10-29 2020-04-30 Bühler Motor GmbH Magnet holder, sensor magnet assembly, electric motor with a sensor magnet assembly and method for producing a sensor magnet assembly
KR102607264B1 (en) * 2019-01-23 2023-11-28 에이치엘만도 주식회사 Device for controlling electric drive

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007055135A1 (en) * 2005-11-14 2007-05-18 Kabushiki Kaisha Yaskawa Denki Magnetic encoder device
US20130200757A1 (en) * 2012-02-03 2013-08-08 Robert Bosch Gmbh Electric machine
KR101364028B1 (en) * 2012-10-02 2014-02-19 엘지전자 주식회사 Electric motor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5744895A (en) * 1995-01-31 1998-04-28 Nippondenso Co., Ltd. System for driving electric vehicles
JP2000032713A (en) * 1998-07-10 2000-01-28 Mitsuba Corp Electric motor unit
JP5558534B2 (en) * 2012-08-29 2014-07-23 三菱電機株式会社 Rotating electric machine
EP2905876B1 (en) * 2012-10-01 2018-11-21 Mitsubishi Electric Corporation Electric drive apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007055135A1 (en) * 2005-11-14 2007-05-18 Kabushiki Kaisha Yaskawa Denki Magnetic encoder device
US20130200757A1 (en) * 2012-02-03 2013-08-08 Robert Bosch Gmbh Electric machine
KR101364028B1 (en) * 2012-10-02 2014-02-19 엘지전자 주식회사 Electric motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3091961A1 (en) * 2019-01-22 2020-07-24 Psa Automobiles Sa ROTATING COLLECTOR FOR A SPOOL ROTOR OF AN ELECTRIC MACHINE.

Also Published As

Publication number Publication date
WO2017131296A1 (en) 2017-08-03
KR20170088707A (en) 2017-08-02
CN208707481U (en) 2019-04-05

Similar Documents

Publication Publication Date Title
US10047754B2 (en) Brushless motor and fan using the motor
KR101798919B1 (en) Rotating electric machine
CN108631477B (en) Electric motor
JP2014099971A (en) Motor
JP2013042633A (en) Motor
JP2007060844A (en) Rotating electric machine with magnetic sensor
JP2007014184A (en) Electric machine, stator structure of electric machine, manufacturing method therefor, and dc motor, brushless dc motor in particular
JP6333479B2 (en) Permanent magnet motor
JP2009303473A (en) Motor and fan using the motor
JPWO2005107049A1 (en) Brushless motor
JP6409321B2 (en) Inner rotor type brushless motor
JP2007267565A (en) Coreless motor
JP7293680B2 (en) motor and blower
JP2007151314A (en) Motor
CN108631473B (en) Electric motor
JP6584331B2 (en) Single-phase brushless motor and method for manufacturing single-phase brushless motor
JP2019103322A (en) Outer rotor type motor
WO2017221702A1 (en) Motor and pump device
KR20130108227A (en) Hall sensor fastening structure of bldc motor
JP5869306B2 (en) Rotor and motor
JP2007221977A (en) Brushless motor
GB2563518A (en) Sensor magnet, rotor, electric motor, and air conditioner
JP3741091B2 (en) DC brushless motor and sealless pump using it
CN111758207B (en) Motor with driving circuit
JP2006180580A (en) Rotary electric machine

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant