CN112436700A

CN112436700A - Double-high axial motor

Info

Publication number: CN112436700A
Application number: CN202011270579.5A
Authority: CN
Inventors: 邓曦; 钟浩
Original assignee: Chongqing Changan Industry Group Co Ltd
Current assignee: Chongqing Changan Industry Group Co Ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-03-02

Abstract

The utility model provides a two high axial motors, includes sectional type armature, rotor dish, bearing pressure disk, characterized by: the bearing is fixed on the stator by the bearing pressure plate, the iron core is fixed by the sectional armature by the stator bar and is connected with the outer motor shell, the iron core is made of a separated soft magnetic composite material and is wound by a flat copper wire, the whole structure is of a double outer rotor and inner stator clamping structure, the iron core is designed into an arc-shaped surface according to the length or different pole numbers from the wire inlet end, the arc is small or not arranged, and the proper arc is arranged far from the wire inlet end; the inlet wire ends of the same phase are selected to be in the middle of the number of poles as much as possible, and the inlet wire ends of the different phases are selected to be at equal angular positions of the circumference as much as possible, for example, a three-phase motor, the inlet wire ends balance the influence of the voltage drop between the opposite poles of the same phase and the different phases on the electromagnetism in sequence by 120 degrees. The invention improves the power and the torque of the motor, adopts the double-sided design to fully utilize the permanent magnet and saves materials.

Description

Double-high axial motor

Technical Field

The invention belongs to the technical field of motors, and particularly relates to a double-high axial motor.

Background

The scheme of the permanent magnet synchronous motor as the mainstream vehicle motor is repeatedly proved, but at present, due to the relation of design and process, the permanent magnet synchronous motor mainly adopts the radial magnetic field design as the main part, the power density of the axial motor with the structure is usually not high, after the position of an efficiency point is deviated, the rotating speed is higher, and the design requirements on a reduction gear and the like are increased. The direct-drive type hub motor can be applied to a direct-drive type hub motor.

In the field of electric machines, axial disc type electric machines are generally represented by high power electric machines, and due to the special stator structure, a large amount of magnetic flux can be generated, but the problem caused by the high magnetic flux is that the stator and the iron core are deformed, and torque pulsation and electromagnetic noise caused by the deformation are more serious.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a double-high axial motor capable of effectively reducing back electromotive force torque pulsation.

The invention relates to a double-high axial motor, which comprises a sectional armature, a rotor disc and a bearing pressure plate, wherein an armature iron core adopts an axial motor separation type design and has no magnetic yoke loss, the bearing pressure plate fixes a bearing on a stator, the sectional armature fixes the iron core by using a stator bar and is connected with an outer motor shell, the iron core is a separated soft magnetic composite material and is wound by a flat copper wire, the whole body is of a double outer rotor internal stator clamping structure, the iron core is designed into an arc surface according to the length or different pole numbers of a distance from a wire inlet end, the arc setting is small or not, and the arc setting is proper; the inlet wire ends of the same phase are selected to be in the middle of the number of poles as much as possible, and the inlet wire ends of the different phases are selected to be at equal angular positions of the circumference as much as possible, for example, a three-phase motor, the inlet wire ends balance the influence of the voltage drop between the opposite poles of the same phase and the different phases on the electromagnetism in sequence by 120 degrees.

According to the invention, mixed wiring is adopted, the wire inlet end is unfolded in a distributed mode as much as possible when entering the armature, counter electromotive force is more easily generated at the pole at the farthest end of the wire arrangement, according to the sequence of reasonably distributing the wire arrangement of the motor, the influence on the counter electromotive force of the armature on the motor structure is eliminated by separating the wire arrangement and processing the iron core with slightly inconsistent size, and the outer surface of the stator iron core at the far end on the processed stator iron core is in a larger arc shape, so that the electromagnetic effect is improved, and the counter electromotive force at the far end is reduced; if the number of the in-phase poles of the motor is even, an outgoing line is arranged in the middle of the wiring, and if the number of the in-phase poles of the motor is odd, the outgoing line is arranged at the most middle pole, so that the fluctuation amount on the relative position in the same phase can be well balanced; distributing the positions of incoming lines according to the number of phases, if the phases are three, the incoming lines mutually form an included angle of 120 degrees, and thus, the fluctuation among the phases can be balanced; because the incoming line close to one end of the control side can be better controlled by the controller, the current of the far-end pole is slightly reduced because of the influence of the interelectrode resistance, and in order to improve the output, an arc-shaped surface can be arranged on the far-end pole iron core, so that the salient pole rate of the far end is improved; pole shoes with arcuate faces may also be provided.

Compared with the prior art, the invention has the beneficial effects that: the back electromotive force of the middle flat cable can be effectively reduced.

Drawings

FIG. 1 is an armature bar;

FIG. 2 is a schematic illustration of an in-phase feed line;

FIG. 3 is a schematic illustration of different phase incoming lines;

FIG. 4 is a distal terminal core;

FIG. 5 is a near line end core;

FIG. 6 is a single-sided axial motor;

fig. 7 is a double-sided axial motor.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

Examples

The double high axial motor according to the present embodiment is shown in fig. 6 and 7: the hybrid wiring is adopted, the wire inlet end is unfolded in a distributed mode as much as possible when entering the armature, the pole at the farthest end of the wire arrangement is easier to generate counter electromotive force, according to the sequence of reasonably distributing the wire arrangement of the motor, the influence on the counter electromotive force of the armature on the motor structure is eliminated by separating the wire arrangement and the iron core with slightly inconsistent processing size, the outer surface of the stator iron core at the far end on the processed stator iron core is in a larger arc shape, the electromagnetic effect is further improved, and the counter electromotive force at the far end is reduced;

according to the difference of the number of the same-phase poles of the motor, if the number of the same-phase poles of the motor is an even number pole, an outgoing line is arranged in the middle of the wiring, and if the number of the same-phase poles of the motor is an odd number pole, the outgoing line is arranged at the most middle pole, so that the fluctuation amount on the relative position on the same phase can be well balanced, as shown in fig. 2 and 3; distributing the positions of incoming lines according to the number of phases, if the phases are three, the incoming lines mutually form an included angle of 120 degrees, and thus, the fluctuation among the phases can be balanced; because the incoming line close to one end of the control side can be better controlled by the controller, the current of the far-end pole is slightly reduced because of the influence of the interelectrode resistance, and in order to improve the output, an arc-shaped surface can be arranged on the far-end pole iron core, so that the salient pole rate of the far end is improved; pole shoes with arc-shaped faces can also be arranged, as shown in fig. 4 and 5; the soft magnetic composite material may be processed into the configuration shown in fig. 3, as the distal pole may be made of a core with an arcuate chamfer, and the pole near the feed line segment may be used.

Claims

1. The utility model provides a two high axial motors, includes sectional type armature, rotor dish, bearing pressure disk, characterized by: the bearing is fixed on the stator by the bearing pressure plate, the iron core is fixed by the sectional armature by the stator bar and is connected with the outer motor shell, the iron core is made of a separated soft magnetic composite material and is wound by a flat copper wire, the whole structure is of a double outer rotor and inner stator clamping structure, the iron core is designed into an arc-shaped surface according to the length or different pole numbers from the wire inlet end, the arc is small or not arranged, and the proper arc is arranged far from the wire inlet end; the inlet wire ends of the same phase are selected to be in the middle of the number of poles as much as possible, and the inlet wire ends of the different phases are selected to be at equal angular positions of the circumference as much as possible, for example, a three-phase motor, the inlet wire ends balance the influence of the voltage drop between the opposite poles of the same phase and the different phases on the electromagnetism in sequence by 120 degrees.