CN210142927U - Stator core and in-wheel motor - Google Patents
Stator core and in-wheel motor Download PDFInfo
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- CN210142927U CN210142927U CN201921139535.1U CN201921139535U CN210142927U CN 210142927 U CN210142927 U CN 210142927U CN 201921139535 U CN201921139535 U CN 201921139535U CN 210142927 U CN210142927 U CN 210142927U
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- stator core
- teeth
- wheel motor
- rim
- tooth
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- 230000005291 magnetic effect Effects 0.000 claims abstract description 25
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003878 thermal aging Methods 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The application discloses stator core and in-wheel motor. The stator core includes teeth uniformly arranged on the outer periphery, the teeth are made of ferromagnetic material, slots are formed between adjacent teeth, and the ratio of the slot area to the tooth area ranges from 0.75 to 0.9 in the cross section. The stator core according to the application can optimize the distribution on the motor magnetic circuit and the circuit.
Description
Technical Field
The application relates to the field of electric vehicles, in particular to a stator core and a hub motor with the same.
Background
The electric vehicle is taken as a new era of travel tool, and has the characteristics of low price, convenience, environmental protection, easy operation and the like, so that the electric vehicle is more and more favored by consumers. At present, more and more rural areas choose electric vehicles as transportation tools, and the cost of the electric vehicles and the stability of the electric vehicles on complex rural roads are main consideration factors for farmers to choose the electric vehicles.
The hub motor is structurally characterized in that an outer rotor type BLDC motor is embedded in the inner side of a hub rim and is welded and fixed, a motor rotor and the hub rim are of an integrated structure, and the motor is electrified and then driven to rotate to directly drive the hub to operate. For a low-speed small-sized electric vehicle, the hub motor has inherent advantages, is integrally designed with a wheel, does not need any transmission system, directly acts driving force on the wheel, and has the characteristics of high driving efficiency, compact structure, high reliability and the like.
The conventional hub motor of the electric vehicle has the problem of low motor conversion efficiency, and under complex road conditions (such as rural roads), the electric vehicle has the problems of insufficient power, weak climbing, short driving mileage, coil burning, Hall device burning and the like, and the motor fails and increases sharply.
SUMMERY OF THE UTILITY MODEL
The main technical problem to be solved by the application is how to optimize the distribution on the magnetic circuit and the electric circuit of the motor.
In order to solve the above technical problem, the present application provides a stator core on the one hand, which includes: the teeth are uniformly arranged on the periphery and made of ferromagnetic materials, grooves are formed between adjacent teeth, and the ratio of the groove area to the tooth area ranges from 0.75 to 0.9 in the cross section.
On the other hand this application provides the in-wheel motor who contains above-mentioned stator core, and it includes and winds around the periphery the rim of stator core, the rim external diameter scope is 260~280mm, and the rim internal diameter scope is 224~230 mm.
According to the technical scheme of the application, the ratio of the groove area to the tooth area is set, so that on one hand, the running efficiency of the hub motor is improved, the power loss of the motor is reduced, the cruising ability of the electric vehicle is increased, and meanwhile, after the running efficiency is improved, the temperature rise of the motor is reduced, the thermal aging risk of the motor is reduced, and the running life of the hub motor is prolonged; on the other hand, the motor output level is improved, the road condition response and the adaptability of the electric vehicle using the hub motor are improved, and the power is more abundant and powerful.
Drawings
The disclosure of the present application is explained with reference to the drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the application. In the drawings, like reference numerals are used to refer to like parts unless otherwise specified. Wherein:
fig. 1 schematically shows in a cross-sectional view a hub electric machine according to an embodiment of the present application;
fig. 2 schematically shows the teeth of the stator core in fig. 1 in an enlarged view;
figure 3 shows schematically the part of figure 1 containing the stator core;
fig. 4 schematically shows the rim of fig. 1.
Detailed Description
Referring to fig. 1, the hub motor according to an embodiment of the present invention includes a hub 1, an a end cap 2, a stator coil 3, a B end cap 4, a main shaft 5, and the like. The wheel hub 1 comprises a wheel rim 1.1, an inflating valve 1.2 embedded from a wheel rim groove, a magnetic conduction ring 1.3 welded on the inner side of the wheel rim, and uniformly distributed permanent magnets 1.4 bonded on the inner side of the magnetic conduction ring through glue. The A end cover 2 comprises an end cover body 2.1, a bearing 2.2 pressed into the inner side of the end cover and an oil seal 2.3 extruded into the outer side of the end cover. Stator solenoid 3 contains inboard iron core support 3.1, and stator core 3.4 fixes on the iron core support, and insulating end plate 3.2 lock joint is on stator core, and winding coil 3.3 sets up on each stator core tooth to connect into the three-phase symmetrical winding according to certain mode, set up the hall element who is used for detecting the position on the stator core simultaneously, hall element pin and three-phase symmetrical winding are drawn forth through the pencil subassembly. The B end cover 4, similar to the A end cover, comprises an end cover body 4.1, a bearing 4.2 pressed into the inner side of the end cover, and an oil seal 4.3 pressed into the outer side of the end cover. The spindle 5 comprises a motor spindle 5.1 and a spline 5.2 embedded in a motor spindle groove.
The hub is assembled in a way that, on one hand, the spindle 5 is pressed into the shaft hole on the inner side of the stator coil 3 through a press machine, the pressing position is overlapped with the knurl on the spindle 5, and the spindle is fixed through the spline 5.2. On the other hand, the joint of the magnetic conduction ring of the hub 1 and the outer skirt of the B end cover is locked and fixed through a screw. Next, the assembled main shaft 5 and stator coil 3 assembly is embedded into a cavity formed by the hub 1 and the B end cover 4, and the main shaft 5 is fixedly supported on a bearing 4.2 on the inner side of the B end cover. And then, the inner hole of the end cover A2 is sleeved into the main shaft 5, and the skirt edge is fixed on the magnetic conduction ring of the hub 1 and locked by a screw.
The stator coil 3 is fixed on the main shaft 5 as a static part, the A end cover 2 and the B end cover 4 are locked at the end of the magnetic conductive ring of the hub 1, and the stator coil is fixed on the main shaft 5 through a bearing at the inner side to be used as an operation part of the hub motor. The Hall slots distributed at fixed positions are arranged on an iron core of the stator coil, Hall elements are placed in the Hall slots and used for detecting the magnetic pole positions of the hub when the hub operates, the Hall circuit board transmits signals of the Hall elements to an ECU platform of an electric vehicle central control unit, and the ECU alternately energizes winding coils according to certain control logic according to the Hall position signals, so that an N, S rotating magnetic field is formed at the periphery of the stator coil, the rotating magnetic field and permanent magnets on the hub generate interaction force, the hub is pulled to rotate, and the electric vehicle is pushed to run.
Referring to fig. 2, the stator core includes teeth 6.1 uniformly arranged on the outer circumference, the teeth being made of a ferromagnetic material, slots 6.2 being configured between adjacent teeth, and the ratio of the slot area S1 to the tooth area S2 in the cross section is in the range of 0.75 to 0.9. The stator core includes 48 teeth arranged uniformly on the outer circumference, each tooth being configured in a T-shape. The portion of the T-shaped configured tooth perpendicular to the diameter direction may also be referred to as a tooth shoulder, and the groove area is the area from the tooth base to the tooth shoulder portion between adjacent teeth. The stator core is manufactured through a spiral winding, punching, stacking and riveting process. The tooth top contour line of the tooth is a straight line.
The range of the outer diameter d of the stator core is 208-213.4 mm, the range of the width a of the notch is 2.3-2.5 mm, the range of the width b of the tooth part is 6.0-7.0 mm, the range of the width c of the yoke part is 5-6 mm, and the range of the inner diameter e is 160-168 mm.
Preferably, the stator core outer diameter is set to 210mm, the slot width is 2.4mm, the tooth width is 6.8mm, the yoke width is 5mm, and the inner diameter is 164 mm.
Referring to fig. 3, a winding coil 3.3 is provided around the tooth 6.1, the slot being intended to receive said winding coil. The winding coil comprises a copper wire winding and/or an aluminum wire winding.
Referring to fig. 4, the in-wheel motor includes a rim 1.1 surrounding the stator core at an outer circumference, a rim outer diameter f ranging from 260 to 280mm, and a rim inner diameter g ranging from 224 to 230 mm.
Preferably, the rim dress child external diameter sets up to 273.5mm, and the rim internal diameter sets up to 227mm, and magnetic ring internal diameter sets up to 215mm, and magnetic ring thickness sets up to 6mm, and permanent magnet thickness sets up to 2mm, and the screw hole aperture sets up 4 mm.
Preferably, the rim dress child external diameter sets up to 273.5mm, and the rim internal diameter sets up to 228mm, and magnetic ring internal diameter sets up to 215.6mm, and magnetic ring thickness sets up to 6.2mm, and permanent magnet thickness sets up to 2.3mm, and the screw hole aperture sets up 4 mm.
The in-wheel motor further comprises a magnetic ring 1.3 arranged on the inner periphery of the rim, the inner diameter h of the magnetic ring ranges from 214 mm to 218mm, the thickness l of the magnetic ring ranges from 5mm to 8mm, a permanent magnet 1.4 is arranged on the inner periphery of the magnetic ring, and the thickness k of the permanent magnet ranges from 1.8mm to 2.5 mm.
The permanent magnets are uniformly attached to the inner periphery of the magnetic conduction ring in an N, S alternating mode in sequence, and can be of a viscose structure or a plastic package structure. Permanent magnets with the same size are uniformly distributed on the inner side of the magnetic conduction ring, and preferably, the permanent magnets are arranged into 52 pieces. The outline of the permanent magnet can be in a square shape, a concentric tile shape or an eccentric tile shape.
According to the utility model discloses an in-wheel motor's advantage lies in, guarantees that current in-wheel motor dress child size is unchangeable, optimizes motor circuit and magnetic circuit structure. On one hand, the running efficiency of the hub motor is improved, the power loss of the motor is reduced, the endurance capacity of the electric vehicle is increased, and meanwhile, after the running efficiency is improved, the temperature rise of the motor is reduced, the thermal aging risk of the motor is reduced, and the running life of the hub motor is prolonged; on the other hand, the output level of the hub motor is also improved, the road condition response and the adaptability of the electric vehicle using the hub motor are improved, and the power is more abundant and powerful.
Claims (10)
1. A stator core, characterized in that the stator core (3.4) comprises teeth (6.1) arranged uniformly at the periphery, which teeth are made of ferromagnetic material, between adjacent teeth grooves (6.2) are configured, in cross-section the ratio of the groove area (S1) to the tooth area (S2) is in the range of 0.75-0.9.
2. The stator core according to claim 1, wherein the stator core comprises 48 teeth arranged uniformly around an outer circumference, each tooth configured in a T-shape.
3. The stator core according to claim 2, wherein the stator core has an outer diameter ranging from 208 to 213.4mm, a slot width ranging from 2.3 to 2.5mm, a tooth width ranging from 6.0 to 7.0mm, a yoke width ranging from 5 to 6mm, and an inner diameter ranging from 160 to 168 mm.
4. The stator core according to claim 1 wherein the stator core is manufactured by a spiral coil punch stack riveting process.
5. The stator core according to claim 4, wherein tooth top contours of the teeth are straight lines.
6. A stator core according to claim 1, characterized in that winding coils (3.3) are provided around the teeth, the slots being intended to receive the winding coils.
7. The stator core according to claim 6, wherein the winding coil comprises a copper wire winding and/or an aluminum wire winding.
8. An in-wheel motor with a stator core according to any one of claims 1 to 7, characterized in that the in-wheel motor comprises a rim (1.1) around the stator core, the rim outer diameter being in the range of 260 to 280mm and the rim inner diameter being in the range of 224 to 230 mm.
9. The in-wheel motor according to claim 8, characterized in that the in-wheel motor comprises a magnetic conduction ring (1.3) arranged on the inner periphery of the rim, the inner diameter of the magnetic conduction ring ranges from 214 mm to 218mm, the thickness of the magnetic conduction ring ranges from 5mm to 8mm, a permanent magnet (1.4) is arranged on the inner periphery of the magnetic conduction ring, and the thickness of the permanent magnet ranges from 1.8mm to 2.5 mm.
10. The in-wheel motor of claim 9, wherein the permanent magnets are evenly distributed on the inner circumference of the flux ring and the number of permanent magnets is 52.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921139535.1U CN210142927U (en) | 2019-07-19 | 2019-07-19 | Stator core and in-wheel motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921139535.1U CN210142927U (en) | 2019-07-19 | 2019-07-19 | Stator core and in-wheel motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210142927U true CN210142927U (en) | 2020-03-13 |
Family
ID=69736695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921139535.1U Active CN210142927U (en) | 2019-07-19 | 2019-07-19 | Stator core and in-wheel motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210142927U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023190784A1 (en) * | 2022-03-31 | 2023-10-05 | ニデック株式会社 | Motor and vehicle |
-
2019
- 2019-07-19 CN CN201921139535.1U patent/CN210142927U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023190784A1 (en) * | 2022-03-31 | 2023-10-05 | ニデック株式会社 | Motor and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231205 Address after: No. 126, Suhong West Road, Suzhou Industrial Park, Jiangsu Province 215021 Patentee after: BOSCH AUTOMOTIVE PRODUCTS (SUZHOU) Co.,Ltd. Address before: 315336 No.29 Xiaotang Road, Hangzhou Bay New District, Ningbo City, Zhejiang Province Patentee before: BOSCH (NINGBO) E-SCOOTER MOTOR Co.,Ltd. |
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| TR01 | Transfer of patent right |