CN218603340U

CN218603340U - Electronic braking brushless motor structure for vehicle

Info

Publication number: CN218603340U
Application number: CN202223106407.1U
Authority: CN
Inventors: 孙文卓
Original assignee: Shandong Shanbo Electric Machine Group Co ltd
Current assignee: Shandong Shanbo Electric Machine Group Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-03-10
Anticipated expiration: 2032-11-22

Abstract

The utility model belongs to the technical field of permanent magnetism direct current brushless motor, concretely relates to automobile-used electronic braking brushless motor structure, including casing and the inside stator of casing and rotor, its characterized in that adopts 12 grooves 10 utmost points electromagnetic structure, and the groove number of stator is 12 grooves, and the number of poles of rotor is 10 utmost points, is used for reducing the tooth's socket torque and the electromagnetic noise of motor to reduce motor vibration. Compared with other electromagnetic schemes, the 12-slot 10-pole electromagnetic power source has the advantages of large winding coefficient, small positioning torque, no unilateral magnetic pull force and the like, and is easy to realize small noise, small torque fluctuation and large output power density. The electronic brake motor control system removes a vacuum pump, realizes that assistance is provided for vehicle braking according to requirements, and the motor replaces a traditional mechanical valve to drive a piston to supply pressure, so that the hardware cost is reduced, the brake force is directly controlled, the brake time is shortened, the brake response is faster, and a shorter brake distance is created.

Description

Electronic braking brushless motor structure for vehicle

Technical Field

The utility model relates to an automobile-used electronic braking brushless motor structure belongs to permanent magnetism direct current brushless motor technical field.

Background

The brake-by-wire system for automobile is one set of electrically controlled brake system and belongs to the field of chassis control. Compared with the traditional vacuum booster pump type brake system, the brake system has the advantages of quicker response and more accurate control. Traditional braking system leans on brake pedal to drive vacuum booster pump and produces brake pressure, and the motor needs periodic work, for braking system provides the vacuum environment, and the work of motor has consumed the on-vehicle battery energy, has reduced electric automobile's continuation of the journey mileage to motor operating time extension has proposed higher requirement to the motor life-span. The permanent magnet direct current brushless motor is used in an automobile brake-by-wire system as an execution element and provides sufficient running braking force for an automobile.

SUMMERY OF THE UTILITY MODEL

According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: the brushless motor structure for the vehicle electronic brake directly controls the braking force and shortens the braking time.

Automobile-used electronic braking brushless motor structure, including inside stator and the rotor of casing and casing, its characterized in that adopts 12 grooves 10 utmost points electromagnetic structure, the groove number of stator is 12 grooves, the number of poles of rotor is 10 utmost points, is used for reducing the tooth's socket torque and the electromagnetic noise of motor to reduce motor vibration. Compared with other electromagnetic schemes, the 12-slot 10-pole electromagnetic power source has the advantages of large winding coefficient, small positioning torque, no unilateral magnetic pull force and the like, and is easy to realize small noise, small torque fluctuation and large output power density.

The diameter of the inner circle and the outer circle of the stator punching sheet is small, if an integral punching sheet is adopted, the winding manufacturability is poor, and if a single-tooth split type punching sheet is adopted, the assembly manufacturability is poor. As shown in fig. 2, the stator punching sheets are divided into a group of four teeth, two-phase windings can be wound on one group of punching sheets to form a winding with an iron core, and the three groups of windings with the iron core are spliced when the stator is assembled.

Preferably, the included angle between the two arc grooves is 10 degrees, and the cogging torque is optimized.

The rotor adopts a non-uniform air gap and unequal arc magnetic steel structure, and mainly aims to weaken the harmonic content in an air gap magnetic field and reduce the torque amplitude of a tooth socket, thereby improving the motion and control performance of the motor.

Preferably, the rotor pole arc coefficient is 0.89, and the maximum and minimum air gap ratio is 3:1.

preferably, the motor windings are in star connection.

Compared with the prior art, the utility model the beneficial effect who has is:

compared with the traditional braking system, the electronic braking motor control system removes a vacuum pump, realizes that the assistance is provided for the braking of the vehicle as required, and the motor replaces a traditional mechanical valve to drive a piston to supply pressure, so that the hardware cost is reduced, the braking force is directly controlled, the braking time is shortened, the braking response is faster, and the shorter braking distance is created.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural diagram of a stator lamination;

FIG. 3 is a schematic view of the structure of the rotor;

FIG. 4 is a schematic diagram of a patch panel configuration;

FIG. 5 isbase:Sub>A cross-sectional view A-A of FIG. 4;

fig. 6 is a schematic diagram of the winding form.

In the figure: 1. a compression nut; 2. a rear bearing; 3. a stator; 3.1, arc grooves; 4. a rotor; 5. a wiring board; 6. a front bearing; 7. an end cap; 8. a rotating shaft; 9. magnetic steel; 10. a protective sleeve; 11. a connecting plate; 12. three-phase pin insertion; 13. and (5) connecting the star points.

Detailed Description

The invention will be further described with reference to specific examples.

However, the description of the present invention is merely a structural or functional description of an embodiment, and the scope of the present invention is not limited by the embodiments described herein.

For example, the embodiments may have various modifications and various forms, and it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea.

Also, since the objects or effects achieved by the present invention do not mean that a specific embodiment should include all of these or only these effects, the scope of the present invention is not limited thereby.

As shown in fig. 1 to 6, the brushless electric motor structure for vehicle electric braking according to the present embodiment mainly includes a rotor 4, a stator 3, a housing, an end cap 7, a front bearing 6, a rear bearing 2, a terminal block 5, a gland nut 1, and other components, where the front bearing 6 is positioned in the end cap 7, the rear bearing 2 is positioned in the housing, and the rotor 4 is positioned by the front and rear bearings.

The motor adopts a 12-slot 10-pole electromagnetic structure and is used for reducing the cogging torque and the electromagnetic noise of the motor and reducing the vibration of the motor. Compared with other electromagnetic schemes, the 12-slot 10-pole electromagnetic power source has the advantages of large winding coefficient, small positioning torque, no unilateral magnetic pull force and the like, and is easy to realize small noise, small torque fluctuation and large output power density.

The diameter of the inner circle and the outer circle of the stator punching sheet is small, if the integral punching sheet is adopted, the winding manufacturability is poor, the slot filling rate is low, and the requirement of high power density cannot be met; the single-tooth split type punching sheet is adopted, after single-group winding, the single-tooth split type punching sheet needs to be fixed after being shaped by a tool, the number of connecting wire joints is large, the technological requirements on welding and the like are high, and the assembly manufacturability is poor. According to the characteristic of 120-degree distribution of stator windings of the brushless motor, punching sheets are divided into a group of four teeth, two-phase windings can be wound on one group of punching sheets to form three groups of windings with iron cores, the winding mode of each group is completely the same, the three groups of windings can be combined randomly, and the three groups of windings with iron cores are spliced when a stator is assembled; in order to reduce the cogging torque, two circular arc grooves 3.1 are cut on the inner circle of each tooth, and the included angle between the circular arc grooves is 10 degrees, so that the cogging torque is optimized through the design of the included angle.

Rotor 4 comprises pivot 8, magnet steel 9, protective sheath 10, in order to reduce starting torque, adopts inhomogeneous air gap, and the arc magnet steel structure that varies, the polar arc coefficient is 0.89, and the biggest and minimum air gap ratio is 3: the design weakens the harmonic content in the air gap magnetic field and reduces the cogging torque amplitude, thereby improving the motor motion and control performance.

The wiring board 5 is composed of a connecting board 11, three-phase contact pins 12 and star point connecting sheets 13, the wiring board 5 connects and fixes 12 outlet terminals of the motor according to a certain mode, and the outlet terminals and the connecting sheets on the wiring board are welded together by resistance welding to form a star connection structure of the motor winding. The outgoing line of the stator winding is welded on a star point connecting sheet 13 and a three-phase inserting sheet which are arranged on a wiring board and pressed into the shell; n, S utmost point magnet steel 9 are evenly pasted to the rotor outer wall, and the outside is prevented with protective sheath 8 that magnet steel 9 from deviating from, relies on front and back bearing and end cover 7 to fix in the casing, and suitable pretightning force is provided by gland nut 1 for the rear bearing 2, prevents that the rear bearing from deviating from.

The utility model discloses an automobile-used electronic braking brushless motor is at environmental protection and energy saving, intelligence and safety, and today that new energy automobile and autopilot technique constantly have risen is more and more big to automobile-used electronic braking motor demand, and application prospect is very wide.

Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.

Claims

1. A brushless motor structure of electronic brake for vehicle, including the stator (3) and trochanter (4) inside the body and body, characterized by that, adopt the electromagnetic structure of 10 poles of 12 troughs, the slot number of the stator (3) is 12 troughs, the pole number of the trochanter (4) is 10 poles; the stator punching sheet is provided with a group of four teeth, two-phase windings are wound on the punching sheet in one group to form a winding with an iron core, and the whole stator is formed by splicing the three groups of windings with the iron core.

2. The brushless electric machine structure of claim 1, wherein the stator lamination has two circular arc grooves (3.1) formed on the inner circle of each tooth.

3. The brushless electric motor structure for vehicle electric brake according to claim 2, wherein the angle between the two arc grooves (3.1) is 10 °.

4. The brushless electric motor structure with electronic brake for vehicle of claim 1, characterized in that the rotor (4) is of non-uniform air gap, unequal arc magnetic steel structure.

5. The brushless electric motor structure of claim 4, wherein the rotor (4) has a pole arc coefficient of 0.89, and a ratio of maximum to minimum air gaps of 3:1.

6. the brushless electric motor structure for vehicle electric brake according to claim 1, wherein the motor windings are star-connected.