CN219979316U

CN219979316U - Outer rotor rotary transformer for hub motor

Info

Publication number: CN219979316U
Application number: CN202321020619.XU
Authority: CN
Inventors: 周伟
Original assignee: Jiangsu Xinwei Power Technology Co ltd
Current assignee: Jiangsu Xinwei Power Technology Co ltd
Priority date: 2023-04-28
Filing date: 2023-04-28
Publication date: 2023-11-07
Anticipated expiration: 2033-04-28

Abstract

The utility model discloses an outer rotor rotary transformer for an in-wheel motor, and aims to provide an outer rotor rotary transformer for an in-wheel motor, which is characterized by comprising a rotary rotor iron core, wherein a rotary stator assembly is further arranged in the rotary rotor iron core, and the rotary stator assembly comprises a rotary stator iron core in the rotary rotor iron core, enameled wires positioned around the rotary stator iron core and outgoing wires arranged on enamelling wires.

Description

Outer rotor rotary transformer for hub motor

Technical Field

The utility model relates to the field of electric vehicle hub motor equipment, in particular to an outer rotor rotary transformer for a hub motor.

Background

The wheel hub motor technology is also called as in-wheel motor technology, and is characterized in that the power, the transmission and the braking device are integrated into the wheel hub, so that the mechanical part of the electric vehicle is greatly simplified. The in-wheel motor technology is not new things, and as early as 1900, an electric automobile with a front wheel equipped with an in-wheel motor has been manufactured, and in the 70 th century, the technology is applied to the fields of mine transport vehicles and the like. For the hub motor used by the passenger car, the day system manufacturer develops the technology earlier, and is in the leading position at present, and international automobile huge heads including general and Toyota are also involved in the technology.

The in-wheel motor driving system is mainly divided into two structural types according to the rotor type of the motor: an inner rotor type and an outer rotor type. The outer rotor adopts a low-speed outer rotor motor, the highest rotating speed of the motor is 1000-1500r/min, a speed reduction device is not arranged, and the rotating speed of the wheels is the same as that of the motor; the inner rotor type adopts a high-speed inner rotor motor, and is provided with a reducer with a fixed transmission ratio, and the rotating speed of the motor can reach 10000r/min to obtain higher power density. With the advent of more compact planetary gear reducers, inner rotor type in-wheel motors are more competitive in terms of power density than low speed outer rotors.

At present, chinese patent publication No. CN101282071a discloses a permanent magnet synchronous hub motor for directly driving wheels of electric vehicles, which comprises a shaft, a left end cover, a rotor, a stator, a right end cover and a rotary transformer, wherein the shaft is provided with a bearing, the inner rings of the left end cover and the right end cover are in interference fit with the bearing, the stator is sleeved on a bracket of the shaft, the left end cover, the right end cover and the rotor are connected into a whole through bolts, and the rotor is formed by alternately pasting magnetic steel glue on the inner wall of the bracket with rare earth magnetic steel.

The permanent magnet synchronous hub motor for directly driving the electric vehicle wheels can be arranged in the wheel hubs to directly drive the wheels, so that the traditional various transmission devices are omitted, the whole vehicle structure is simplified, the transmission efficiency is improved, and the space is effectively utilized; the utility model is an external rotor motor, has no reduction gear mechanism, small volume and high specific power, and can reduce the weight of the whole vehicle; the starting moment is large, the energy consumption is low, and the continuous mileage and the service life of the battery can be improved; the operation is stable and reliable, the control performance is good, and the maintenance cost of the vehicle is reduced, but at present, the common practice in the industry is to adopt a Hall sensor or an inner rotor rotary transformer, the Hall sensor has poor precision and low reliability, and the installation mode of the inner rotor rotary transformer is not suitable for an in-wheel motor.

Disclosure of Invention

The utility model aims to provide an outer rotor rotary transformer for an in-wheel motor, which has the advantages of high precision and reliability, and the installation mode of the inner rotor rotary transformer is suitable for the in-wheel motor.

The technical aim of the utility model is realized by the following technical scheme:

the utility model provides an external rotor rotary transformer for in-wheel motor, includes the rotor core, still be equipped with the rotor subassembly in the rotor core, the rotor subassembly includes the rotor core in the rotor core, is located the enameled wire all around of rotor core and is located the lead-out wire that is equipped with on the enamelling wire.

Further set up: an insulating framework which is circumferentially distributed is further arranged between the enameled wire and the rotary rotor iron core.

Further set up: the surface of the rotary rotor iron core is also provided with a plurality of mounting holes.

Further set up: and the rotary stator iron core is also provided with an installation key.

Further set up: the rotary stator iron core center is also provided with a rotating shaft, the rotating shaft is also provided with a snap spring for the shaft, and the rotating shaft is positioned outside the snap spring for the shaft and is also provided with a hub.

In summary, the utility model has the following beneficial effects: the power is big, more energy-conserving, and power density is higher, and the mounting means is fit for in-wheel motor.

Drawings

The utility model is further described below with reference to the accompanying drawings.

Fig. 1 is a front view of an outer rotor resolver for an in-wheel motor;

fig. 2 is a side view of an outer rotor resolver for an in-wheel motor;

FIG. 3 is a schematic view of the overall structure of an outer rotor resolver for an in-wheel motor;

fig. 4 is a schematic diagram of an installation structure of an outer rotor resolver for an in-wheel motor.

In the figure, 1, a rotary stator assembly; 2. rotating the rotor core; 3. a mounting hole; 4. installing a key; 5. a lead-out wire; 6. an insulating skeleton; 7. enamelled wires; 8. a rotating stator core; 9. clamping springs for shafts; 10. a hub; 11. and (3) rotating the shaft.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings.

The technical scheme adopted by the utility model is as follows: the utility model provides an external rotor resolver for in-wheel motor, as shown in fig. 1, fig. 2 and fig. 3, including the rotor core 2, still be equipped with in the rotor core 2 and revolve the stator subassembly 1, the rotor subassembly 1 includes the rotor core 8 that revolves in the rotor core 2, be located the enameled wire 7 and be located the lead-out wire 5 that are equipped with on the enameled wire 7 all around of revolving the stator core 8, still be equipped with circumference distributed's insulating skeleton 6 between enameled wire 7 and the rotor core 2, rotor core 2 surface still is equipped with a plurality of mounting holes 3, still be equipped with installation key 4 on the rotor core 8, the rotor core 8 center still is equipped with axis of rotation 11, still be equipped with on axis of rotation 11 and use jump ring 9, axis of rotation 11 is located the outer hub 10 that still is equipped with of jump ring 9.

The main working principle is as follows: as shown in fig. 4, the whole device comprises a rotary rotor iron core and a rotary stator assembly 1, wherein the rotary rotor iron core and the rotary stator assembly 1 are provided with an air gap; the inner hole of the rotary rotor core is provided with arc-shaped bulges which can divide the number of poles of the motor of the hub 10. The rotational stator assembly 1 comprises: enameled wire 7, rotary stator iron core, outgoing wire 5 and insulating framework 6; the rotary rotor iron core is uniformly provided with mounting holes 3 which are arranged on a motor hub 10 of the hub 10 through screws; the inner hole of the rotary stator core is provided with a mounting key 4, the rotary stator assembly 1 is fixed on a rotating shaft 11 through the mounting key 4, and the rotating shaft 11 is provided with a shaft clamping spring 9 for limiting the axial displacement of the rotary stator assembly 1. The number of poles of the rotary transformer is even, the rotary transformer is arranged on the rotating shaft 11, the mounting holes 3 are uniformly distributed on the rotary rotor core 2 and are arranged on the motor hub 10 of the hub 10 through screws, and the number of poles can be selected to be 10, 14, 20, 28 and 30.

The foregoing is a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation and variation of the above embodiment according to the technical substance of the present utility model falls within the scope of the technical solution of the present utility model.

Claims

1. An external rotor rotary transformer for an in-wheel motor is characterized in that: the rotary transformer comprises a rotary transformer core (2), a rotary transformer stator assembly (1) is further arranged in the rotary transformer core (2), and the rotary transformer stator assembly (1) comprises a rotary transformer core (8) in the rotary transformer core (2), enameled wires (7) positioned around the rotary transformer core (8) and outgoing wires (5) arranged on the enameled wires (7).

2. The external rotor resolver for an in-wheel motor according to claim 1, wherein: an insulating framework (6) which is circumferentially distributed is further arranged between the enameled wire (7) and the rotary rotor iron core (2).

3. The external rotor resolver for an in-wheel motor according to claim 2, wherein: the surface of the rotary rotor iron core (2) is also provided with a plurality of mounting holes (3).

4. An outer rotor resolver for an in-wheel motor according to claim 3, wherein: and the rotary stator iron core (8) is also provided with an installation key (4).

5. The external rotor resolver for an in-wheel motor according to claim 4, wherein: the rotary stator core (8) is characterized in that a rotating shaft (11) is further arranged at the center of the rotary stator core (8), a clamp spring (9) for a shaft is further arranged on the rotating shaft (11), and a hub (10) is further arranged outside the clamp spring (9) for the shaft, wherein the rotating shaft (11) is arranged on the rotating shaft.