CN215601182U

CN215601182U - Inner rotor motor for electric vehicle

Info

Publication number: CN215601182U
Application number: CN202121345789.6U
Authority: CN
Inventors: 高超; 李越; 夏正朋
Original assignee: Yadea Technology Group Co Ltd
Current assignee: Yadea Technology Group Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2022-01-21
Anticipated expiration: 2031-06-17

Abstract

The utility model discloses an inner rotor motor for an electric vehicle, which comprises a stator and a rotor, wherein the stator is provided with a central hole, the rotor can rotate relative to the stator, the rotor comprises a rotating shaft, a magnetic conduction iron core and a plurality of magnetic steels, the magnetic conduction iron core is rotatably arranged in the central hole in a penetrating way, the rotating shaft is fixedly arranged in the magnetic conduction iron core in a penetrating way, the magnetic conduction iron core is provided with a plurality of magnetic steel grooves at intervals along the circumferential direction of the magnetic conduction iron core, the plurality of magnetic steel grooves can contain at least one magnetic steel, the magnetic conduction iron core is provided with a plurality of air groove groups at intervals along the circumferential direction of the magnetic conduction iron core, each air groove group comprises two first air grooves, and the two first air grooves are respectively arranged at two sides of each magnetic steel groove and are communicated with the magnetic steel grooves. The inner rotor motor for the electric vehicle has the advantages of reduced tooth space torque, less noise, stable operation, better use performance, reduced cost, convenient use, simple structure and strong practicability.

Description

Inner rotor motor for electric vehicle

Technical Field

The utility model relates to the technical field of electric vehicles, in particular to an inner rotor motor for an electric vehicle.

Background

With the mass market entry of electric vehicles, people have been developing high-power electric motorcycles and electric vehicles to replace fuel vehicles. Compared with the traditional fuel oil automobile, the electric automobile is equivalent to a battery to replace fuel oil and an electric motor to replace an engine. Because the energy density of the battery is far lower than that of fuel oil, if the cost of using a large-capacity battery is too high, the cost of the whole vehicle equipped with the large-capacity lithium battery is increased and is far higher than the prices of a fuel oil motorcycle and a fuel oil automobile. Because the current high-power permanent magnet rotating motor has the problems of large no-load current, low efficiency, small torque, high temperature rise and poor reliability, the power performance and the continuous running capability of the electric vehicle are far lower than those of a fuel vehicle, so that the performance of the motor with the traditional structure cannot be directly suitable for the electric vehicle. Therefore, the battery and the motor are the core of the electric vehicle and are the key for restricting the development of the electric vehicle.

The motor is a widely used product with huge energy consumption, and how to improve the efficiency of the motor and reduce the energy consumption of the motor becomes the development direction of the motor. The inner rotor motor is frequently used in the existing electric vehicle, because the motor rotates at a high speed, shaking easily occurs, and the cogging torque of the motor is large, so that the motor vibrates, noise is generated, and the stable operation of the motor is influenced, so that the use performance of the inner rotor motor is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an inner rotor motor for an electric vehicle, which aims to solve the problems that the existing motor rotates at a high speed, is easy to shake, and has poor service performance due to more cogging torque.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an inner rotor motor for an electric vehicle, comprising:

a stator provided with a central hole;

the rotor, the rotor can be relative the stator rotates, the rotor includes rotation axis, magnetic conduction iron core and a plurality of magnet steel, magnetic conduction iron core rotates and wears to locate the centre bore, the rotation axis is fixed to wear to locate magnetic conduction iron core, magnetic conduction iron core is provided with a plurality of magnetic steel grooves along its circumference interval, every the magnetic steel groove can hold at least one the magnet steel, magnetic conduction iron core is provided with a plurality of air slot groups along its circumference interval, the air slot group includes two first air slots, two first air slot set up respectively in the both sides in magnetic steel groove and with the magnet steel groove intercommunication.

Preferably, the air groove group further includes two second air grooves, the two second air grooves are respectively disposed on two sides of the magnetic steel groove and are communicated with the magnetic steel groove, and the first air groove and the second air groove are respectively disposed at two ends of the magnetic steel groove.

Preferably, the air slot group comprises a third air slot, and the third air slot is arranged on the outer peripheral surface of the magnetic iron core and is communicated with the magnetic steel slot.

Preferably, the groove wall of one end of the magnetic steel groove is provided with a first protrusion, the groove wall of the other end of the magnetic steel groove is provided with a second protrusion, and the first protrusion and the second protrusion can be respectively abutted to two ends of the magnetic steel.

Preferably, the magnetic conductive iron core is provided with a plurality of lightening holes at intervals along the circumferential direction.

Preferably, the number of the magnetic steel grooves is 10-14.

Preferably, the stator is provided with a positioning groove on an outer circumferential surface thereof.

Preferably, the stator is provided with a plurality of coil inserting grooves at intervals along the circumferential direction of the stator, and the coil inserting grooves are used for accommodating coil windings.

Preferably, a plurality of fourth air grooves are formed in the inner circumferential surface of the stator at intervals in the circumferential direction, and the plurality of fourth air grooves and the plurality of caulking grooves are communicated with each other in a one-to-one correspondence.

An electric vehicle comprises the inner rotor motor for the electric vehicle.

The utility model has the beneficial effects that: the utility model provides an inner rotor motor for an electric vehicle, which comprises a stator and a rotor, wherein the stator is provided with a central hole, the rotor can rotate relative to the stator, the rotor comprises a rotating shaft, a magnetic conducting iron core and a plurality of magnetic steels, the magnetic conducting iron core is rotatably arranged in the central hole in a penetrating way, the rotating shaft is fixedly arranged in the magnetic conducting iron core in a penetrating way, the magnetic conducting iron core is provided with a plurality of magnetic steel grooves at intervals along the circumferential direction of the magnetic conducting iron core, each magnetic steel groove can contain at least one magnetic steel, the magnetic conducting iron core is provided with a plurality of air groove groups at intervals along the circumferential direction of the magnetic conducting iron core, each air groove group comprises two first air grooves, and the two first air grooves are respectively arranged at two sides of each magnetic steel groove and are communicated with the magnetic steel grooves. Magnetic conduction iron core is provided with a plurality of magnetic steel grooves along its circumference interval, the magnetic steel groove is rectangular shape, set up magnetic conduction iron core into spoke formula structure, the tooth's socket torque that enables the motor to have reduces, and two first air grooves use the magnetic steel groove to set up as symmetry axis symmetry, and communicate with the magnetic steel groove, be the butterfly type, first air groove can play the effect that separates magnetism, can the noise reduction, guarantee the even running of motor, make the motor have better performance, therefore, the carrier wave energy saving device is low in cost, high durability and convenient use, and is simple in structure, and has very strong practicality.

Drawings

Fig. 1 is a schematic structural view of an inner rotor motor for an electric vehicle according to an embodiment of the present invention;

fig. 2 is an enlarged view at a in fig. 1.

In the figure:

1. a magnetically permeable iron core; 2. a rotating shaft; 3. a magnetic steel groove; 41. a first air tank; 42. a second air tank; 43. a third air tank; 5. lightening holes; 6. a first protrusion; 7. a second protrusion; 8. magnetic steel; 9. and (4) self-buckling points.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides an inner rotor motor for an electric vehicle, which has the advantages of reduced tooth space torque, less noise, stable operation, better service performance, reduced cost, convenient use, simple structure and strong practicability.

As shown in fig. 1 and 2, the inner rotor motor for an electric vehicle includes a stator and a rotor, wherein the stator is provided with a center hole, the rotor can rotate relative to the stator, the rotor includes a rotating shaft 2, a magnetic conductive iron core 1 and a plurality of magnetic steels 8, the magnetic conductive iron core 1 rotates to penetrate through the center hole, the rotating shaft 2 is fixedly penetrated through the magnetic conductive iron core 1, the magnetic conductive iron core 1 is provided with a plurality of magnetic steel slots 3 along a circumferential interval thereof, each magnetic steel slot 3 can accommodate at least one magnetic steel 8, the magnetic conductive iron core 1 is provided with a plurality of air slot sets along a circumferential interval thereof, the air slot set includes two first air slots 41, and the two first air slots 41 are respectively disposed on two sides of the magnetic steel slots 3 and communicated with the magnetic steel slots 3. Magnetic conduction iron core 1 is provided with a plurality of magnetic steel grooves 3 along its circumference interval, magnetic steel groove 3 is rectangular shape, set up magnetic conduction iron core 1 into spoke formula structure, the tooth's socket torque that enables the motor to have reduces, and two first air grooves 41 use magnetic steel groove 3 to set up as symmetry axis symmetry, and communicate with magnetic steel groove 3, be the butterfly type, first air groove 41 can play the effect that separates magnetism, can the noise reduction, guarantee the even running of motor, make the motor have better performance, therefore, the carrier wave prepaid electric energy meter is convenient to use, moreover, the steam generator is simple in structure, and has very strong practicality. Preferably, magnetic core 1 still is provided with a plurality of from knot point 9, and a plurality of from knot point 9 all evenly spaced along magnetic core 1's circumference sets up, and the rotor that can be convenient for is folded from knot point 9 and is pressed as an organic whole to the setting.

Preferably, the air slot group further includes two second air slots 42, the two second air slots 42 are respectively disposed on two sides of the magnetic steel slot 3 and are communicated with the magnetic steel slot 3, and the first air slot 41 and the second air slot 42 are respectively disposed on two ends of the magnetic steel slot 3. The second air groove 42 is arc-shaped, and the second air groove 42 can play a role of magnetic isolation.

Preferably, the air slot group comprises a third air slot 43, and the third air slot 43 is arranged on the outer circumferential surface of the magnetically permeable iron core 1 and is communicated with the magnetic steel slot 3. The magnetic lines of force cannot pass through the third air slot 43 and the second air slot 42, only the middle part between the magnetic steel slot 3 and the adjacent magnetic steel slot 3 can be used as a transmission path, and the third air slot 43 and the second air slot 42 can ensure that most of the magnetic lines of force reach the air gap through the transmission path and are transmitted to the stator, so that the electromagnetic induction is realized, and the magnetic flux leakage can be reduced.

Preferably, the cell wall of 3 one ends in magnet steel groove is provided with first arch 6, and the cell wall of the other end is provided with second arch 7, and first arch 6 and second arch 7 can respectively with the both ends butt of magnet steel 8. First arch 6 and second arch 7 can carry on spacingly to magnet steel 8, can resist the centrifugal force of magnet steel 8 when the rotor is rotatory to be fixed in magnet steel 8 in magnet steel groove 3.

Preferably, the magnetically permeable iron core 1 is provided with a plurality of lightening holes 5 at intervals along the circumferential direction thereof. The lightening holes 5 are triangular or circular, and are uniformly provided with a plurality of lightening holes 5 at intervals along the circumferential direction of the magnetic conductive iron, so that the rotor can be prevented from shaking in the rotating process due to the overlarge mass of the magnetic conductive iron, the light-weighted requirement is met, and the magnetic leakage can be reduced.

Preferably, the number of the magnetic steel grooves 3 is 10-14. Each magnetic steel groove 3 is embedded with at least one magnetic steel 8, and the magnetic flux of each pole of the spoke type rotor is provided by the magnetic steels 8 in the two adjacent magnetic steel grooves 3 in parallel, so that larger magnetic flux of each pole can be obtained, and the structure has obvious advantages especially when the number of pole pairs of the motor is large.

Preferably, the stator is provided with a positioning groove on an outer circumferential surface thereof. The constant head tank can fix a position when the stator assembles to prevent that the stator from appearing rotating, fix spacing effectual.

Preferably, the stator is provided with a plurality of coil inserting grooves at intervals along the circumferential direction thereof, the coil inserting grooves being used for accommodating coil windings. The coil winding can be fixed by the wire embedding groove.

Preferably, the inner circumferential surface of the stator is provided with a plurality of fourth air grooves at intervals along the circumferential direction thereof, and the plurality of fourth air grooves and the plurality of caulking grooves are communicated with each other in a one-to-one correspondence manner. The fourth air grooves are rectangular or arc-shaped grooves, the plurality of fourth air grooves are uniformly distributed at intervals along the circumferential direction of the stator, the number of fundamental wave periods of the cogging torque of the stator can be increased, the fourth air grooves can generate new cogging torque to compensate the original cogging torque, and therefore the amplitude of the total cogging torque is reduced.

The utility model also provides an electric vehicle which comprises the inner rotor motor for the electric vehicle.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An inner rotor motor for an electric vehicle, comprising:

a stator provided with a central hole;

the rotor, the rotor can be relative the stator rotates, the rotor includes rotation axis (2), magnetic conduction iron core (1) and a plurality of magnet steel (8), magnetic conduction iron core (1) rotates to wear to locate the centre bore, rotation axis (2) are fixed to wear to locate magnetic conduction iron core (1), magnetic conduction iron core (1) is provided with a plurality of magnet steel grooves (3) along its circumference interval, every magnet steel groove (3) can hold at least one magnet steel (8), magnetic conduction iron core (1) is provided with a plurality of air slot groups along its circumference interval, the air slot group includes two first air slots (41), two first air slots (41) set up respectively in the both sides of magnet steel groove (3) and with magnet steel groove (3) intercommunication.

2. The inner rotor motor for the electric vehicle according to claim 1, wherein the air slot set further includes two second air slots (42), the two second air slots (42) are respectively disposed at two sides of the magnetic steel slot (3) and communicate with the magnetic steel slot (3), and the first air slot (41) and the second air slot (42) are respectively disposed at two ends of the magnetic steel slot (3).

3. The inner rotor motor for an electric vehicle according to claim 1, wherein the air slot group includes a third air slot (43), and the third air slot (43) is provided in an outer peripheral surface of the magnetically permeable core (1) and communicates with the magnetic steel slot (3).

4. The inner rotor motor for the electric vehicle according to claim 1, wherein a first protrusion (6) is provided on a wall of one end of the magnetic steel slot (3), and a second protrusion (7) is provided on a wall of the other end of the magnetic steel slot, and the first protrusion (6) and the second protrusion (7) can abut against both ends of the magnetic steel (8), respectively.

5. An inner rotor motor for an electric vehicle according to any one of claims 1 to 4, wherein the magnetically permeable core (1) is provided with a plurality of weight-reducing holes (5) at intervals along a circumferential direction thereof.

6. An inner rotor motor for an electric vehicle according to any of claims 1 to 4, wherein the number of the magnetic steel slots (3) is 10 to 14.

7. An inner rotor motor for an electric vehicle according to any one of claims 1 to 4, wherein a positioning groove is provided on an outer peripheral surface of the stator.

8. An inner rotor motor for an electric vehicle according to any one of claims 1 to 4, wherein the stator is provided with a plurality of caulking grooves at intervals in a circumferential direction thereof, the caulking grooves being adapted to receive coil windings.

9. The inner rotor motor for an electric vehicle according to claim 8, wherein a plurality of fourth air grooves are provided in the inner peripheral surface of the stator at intervals in the circumferential direction thereof, and the plurality of fourth air grooves and the plurality of caulking grooves communicate with each other in a one-to-one correspondence.

10. An electric vehicle comprising the inner rotor motor for an electric vehicle according to any one of claims 1 to 9.