CN213637238U

CN213637238U - Novel stator and rotor structure of high-speed permanent magnet synchronous motor

Info

Publication number: CN213637238U
Application number: CN202023083269.0U
Authority: CN
Inventors: 戈宝军; 姜汉; 张同斌
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-07-06
Anticipated expiration: 2030-12-18

Abstract

The utility model provides a novel high-speed PMSM's stator-rotor structure belongs to motor structure technical field. The stator portion includes: a stator core, a stator winding; the rotor portion includes: a rotor core, a permanent magnet, and a vent hole; the motor stator part adopts a pestle-shaped groove structure, the bottom of the groove is embedded with a stator winding, and part of air gaps are reserved at the notch part; the stator winding adopts a duplex winding structure, so that the potential waveform can be effectively improved, and higher harmonics can be inhibited; the heat dissipation performance of the motor can be improved by the aid of the sharp end structure of the pestle-shaped groove; the motor rotor part is provided with a permanent magnet and a vent hole, the permanent magnet adopts an inner arc structure and is arranged in the rotor iron core, and the structure is favorable for improving the power density of the motor and improving the dynamic performance of the motor; the ventilation holes are symmetrical about the rotor core, so that magnetic flux at the aligned position is reduced, vibration and noise of the motor are reduced, and the ventilation holes are matched with the rotor slots to enable the motor to obtain good heat dissipation performance.

Description

Novel stator and rotor structure of high-speed permanent magnet synchronous motor

Technical Field

The utility model relates to a novel high-speed PMSM structure belongs to motor structure technical field.

Background

In recent years, high-speed permanent magnet synchronous motors are widely applied to various fields of industrial production and life, compared with traditional permanent magnet synchronous motors, the high-speed permanent magnet synchronous motors have the advantages of high power density, high efficiency, high reliability, easiness in control and the like, and are well favored by people.

Disclosure of Invention

The utility model aims at providing a novel high-speed PMSM structure to solve high-speed PMSM at high-speed operation in-process heat dissipation scheduling problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a high-speed permanent magnet synchronous motor structure, 6 utmost point 36 groove motors is proposed, and the stator body includes: a stator core, a stator winding; the stator core is of a punching sheet structure with a groove formed inside, the stator groove is divided into two parts, a winding is embedded at the bottom of the groove, and the stator winding is of a double-winding structure, so that the improvement of an electromotive force waveform, the inhibition of higher harmonics and the reduction of the loss and the heating of a motor are facilitated; the structure of the notch portion improves the heat dissipation performance of the motor.

As an improvement of the technical scheme, the rotor is in a mode of embedding the permanent magnet, when the permanent magnet runs at a high speed, the permanent magnet is easy to fall off from the surface of the rotor in the surface-mounted permanent magnet synchronous motor, the permanent magnet of the embedded permanent magnet synchronous motor is positioned in the rotor, and a pole shoe made of ferromagnetic substances is arranged between the outer surface of the permanent magnet and the outer surface of the rotor, so that the permanent magnet synchronous motor can run at a high speed. The unique structure of the permanent magnet can ensure that the motor has higher power density and reduce the loss of the motor.

As an improvement of the technical scheme, the rotor core is provided with symmetrical ventilation holes, and the symmetrical ventilation holes enhance the heat dissipation performance of the motor on one hand, reduce the magnetic flux at the aligned position on the other hand, and reduce the loss of the motor.

Through foretell novel high-speed PMSM can effectively improve high-speed PMSM heat dissipation problem, reduce the motor loss, make the motor obtain better performance.

Drawings

Fig. 1 is a schematic structural diagram of the high-speed permanent magnet synchronous motor of the present invention.

Fig. 2 is a schematic view of a stator "pestle" slot configuration.

Fig. 3 is a schematic view of a rotor structure.

Shown in the figure: 1. a stator core; 2. a stator winding; 3. a rotating shaft; 4. A rotor core; 5 a permanent magnet; 6. a vent hole.

Detailed Description

For making the utility model discloses technical means, creation characteristic, efficiency and the requirement of realizing reach and understand understandable effect, combine specific embodiment below, right the utility model discloses do further explanation.

Referring to the attached figure 1, the utility model provides a novel high-speed permanent magnet synchronous motor, its characterized in that: stator slot type, permanent magnet structure and mode of placement, stator ventilation hole.

The stator slot shape, see fig. 2, uses a unique "pestle" shaped slot with the bottom of the slot partially embedding the winding and the air gap of the slot portion matching with the ventilation holes of the rotor core to improve the heat dissipation performance of the motor.

The stator winding adopts the duplex winding structure, can effectively improve the electromotive force wave form, restraines the higher harmonic, reduces the loss and the heating of motor.

The permanent magnet adopts an inner arc structure to reduce the loss of the motor.

The ventilation holes are symmetrically arranged on the rotor iron core, and the magnetic flux at the aligned position can be changed through the symmetrical ventilation holes, so that the loss and vibration of the motor are reduced, the ventilation and heat dissipation performance of the motor is increased, and the heat dissipation of the motor is facilitated.

The present embodiments are merely exemplary of the present patent and do not limit the scope of the patent, and those skilled in the art may make modifications to the parts thereof without departing from the spirit and scope of the patent.

Claims

1. a novel high-speed permanent magnet synchronous motor stator and rotor structure, it is characterized in that: the motor is a 6-pole 36-slot rotating magnetic pole type structure, and the stator slot uses a " pestle " shape slot structure, and the stator winding uses a double-winding structure, and each permanent magnet uses The inner arc structure is embedded in the rotor iron core, and a ventilation hole is opened on the rotor iron core.

2. A novel high-speed permanent magnet synchronous motor stator and rotor structure as claimed in claim 1, characterized in that: double windings are embedded at the bottom of the stator slot, and an air gap is left at the slot, and the length ratio of the two parts is about 1.15 :1.

3. a kind of novel high-speed permanent magnet synchronous motor stator and rotor structure as claimed in claim 1 is characterized in that: use 6 permanent magnets with the same structure, size and material, each permanent magnet mechanical angle is 50 °, evenly built-in on the rotor core.

4. A novel high-speed permanent magnet synchronous motor stator and rotor structure as claimed in claim 1, characterized in that 6 circular ventilation holes are opened on the rotor iron core, the positions of which are symmetrical with respect to the rotor iron core, and the diameter is 8 mm.