CN113224863A

CN113224863A - Novel permanent magnet auxiliary synchronous reluctance motor structure

Info

Publication number: CN113224863A
Application number: CN202110629346.8A
Authority: CN
Inventors: 戈宝军; 张同斌; 巫志强
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-08-06

Abstract

The invention relates to a novel permanent magnet auxiliary synchronous reluctance motor structure, which belongs to the field of motor structure design and mainly comprises a stator core, a rotor punching sheet, a stator chute, an auxiliary groove, a motor shaft, a vent hole, a W-shaped groove, an inner magnetic bridge and a permanent magnet, wherein the permanent magnet auxiliary synchronous reluctance motor combines the advantages of a permanent magnet synchronous motor and a synchronous reluctance motor, the reluctance torque and the permanent magnet torque are fully utilized, the stator groove of the motor adopts a chute structure, the cogging torque of the motor is favorably inhibited, the auxiliary groove is uniformly and symmetrically distributed on the stator core, the cogging torque of the motor is further reduced, the performance of the motor is improved, the W-shaped groove is uniformly distributed on the rotor punching sheet along the circumferential direction, the permanent magnet is placed in the W-shaped groove, the inner magnetic bridge is arranged at the connection position of the W-shaped groove, the vent hole ratio of the motor is increased, the power factor and the torque density of the motor are improved, and the salient poles are uniformly distributed on the rotor punching sheet, the temperature of the motor is reduced, and the operation efficiency of the motor is improved.

Description

Novel permanent magnet auxiliary synchronous reluctance motor structure

Technical Field

The invention relates to the technical field of motor structures, in particular to a novel permanent magnet auxiliary synchronous reluctance motor structure.

Technical Field

The permanent magnet auxiliary synchronous reluctance motor combines the characteristics of a permanent magnet synchronous motor and a synchronous reluctance motor, fully utilizes reluctance torque and permanent magnet torque, and has the remarkable advantages of high power density, high efficiency, wide speed regulation range, small volume, light weight and the like. Compared with a permanent magnet synchronous motor, the permanent magnet auxiliary synchronous reluctance motor can only use a small amount of rare earth permanent magnets or ferrite as a permanent magnet material, and the same output performance and energy-saving level can be achieved through optimized design. The cogging torque of the permanent magnet-assisted synchronous reluctance motor is generated by the interaction between the permanent magnet field and the armature cogging, and exhibits a periodic variation, which is represented by an additional torque ripple, causing vibration and noise of the motor, so that the cogging torque of the motor is reduced. The salient pole ratio of the motor is a decisive parameter influencing the high efficiency and high torque of the motor, so that the operating performance of the motor can be greatly improved by increasing the salient pole ratio of the motor.

Disclosure of Invention

The invention mainly provides a novel permanent magnet auxiliary synchronous reluctance motor structure which is used for reducing the cogging torque of a motor, increasing the salient pole ratio of the motor and further improving the running performance of the motor.

In order to achieve the above object, the present invention provides the following solutions: the invention provides a novel permanent magnet auxiliary synchronous reluctance motor structure which mainly comprises a stator iron core, a rotor punching sheet, a stator chute, an auxiliary groove, a motor shaft, ventilation openings, W-shaped grooves, inner magnetic bridges and permanent magnets, wherein the rotor punching sheet is embedded in the stator iron core, the rotor punching sheet is coaxial with the stator iron core, the motor shaft is arranged at the center of the rotor punching sheet, the stator chute is deviated from a radial direction by 15 degrees, the auxiliary grooves are symmetrically distributed on the stator iron core, the W-shaped grooves are uniformly distributed on the rotor punching sheet along the circumferential direction, the inner magnetic bridges are distributed at the joints of the W-shaped grooves, the permanent magnets are placed in the W-shaped grooves, and the ventilation openings are uniformly distributed on the rotor punching sheet.

Compared with the prior art, the invention has the following technical effects: the stator slot of motor adopts the chute structure, help inhibiting the tooth's socket torque of motor, the even symmetric distribution of supplementary groove is on stator iron core simultaneously, the tooth's socket torque of motor has further been reduced, the performance of motor has been improved, along circumferencial direction evenly distributed W type groove on the rotor punching, place the permanent magnet in W type groove, the salient pole ratio of increase motor, the power factor and the torque density of motor have been improved, the setting of interior magnetic bridge helps improving the mechanical strength of rotor, the vent evenly distributed is on the rotor punching, be favorable to reducing the temperature of motor, improve motor operating efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below. It is to be understood that the drawings described below are merely exemplary of some of the embodiments of the invention. It is also possible for a person skilled in the art to obtain them from these figures without the inventive effort of other efforts.

Fig. 1 is a schematic structural diagram of a novel permanent magnet-assisted synchronous reluctance motor structure according to the present invention.

Fig. 2 is a schematic cross-sectional view of a W-shaped groove of a rotor punching sheet of a novel permanent magnet auxiliary synchronous reluctance motor structure according to the present invention.

Description of reference numerals: 1. a stator core; 2. rotor punching sheets; 3. a stator chute; 4. an auxiliary groove; 5. a motor shaft; 6. a vent; 7. a W-shaped groove; 8. an inner magnetic bridge; 9. and a permanent magnet.

Detailed Description

The invention explicitly and completely describes the technical scheme in the embodiment. The described embodiments are only a part of the embodiments of the present invention, and not all embodiments. The implementation of the embodiments of the invention also relates to other embodiments that can be obtained by a person skilled in the art without inventive work.

The first embodiment is as follows: as shown in fig. 1, the present embodiment provides a novel permanent magnet assisted synchronous reluctance motor structure, which includes a stator core 1, a rotor punching sheet 2, a stator chute 3, an auxiliary groove 4, a motor shaft 5, a vent 6, and a W-shaped groove 7; the rotor punching sheet 2 is embedded in the stator core 1, the rotor punching sheet 2 is coaxial with the stator core 1, the motor shaft 5 is arranged at the center of the rotor punching sheet 2, the stator chute 3 is a radial 15-degree angle, the auxiliary grooves 4 are symmetrically distributed on the stator core 1, the W-shaped grooves 7 are uniformly distributed on the rotor punching sheet 2 along the circumferential direction, and the ventilation openings 6 are uniformly distributed on the rotor punching sheet 2.

In the embodiment, the stator chute 3 is at an angle deviating from the radial direction by 15 degrees, and the auxiliary slots 4 are symmetrically distributed on the stator core 1, so that the cogging torque of the motor is reduced. The improved stator slot type in the embodiment is beneficial to reducing the cogging torque in the running process of the motor, and is greatly helpful to reducing the noise and vibration of the motor. The W-shaped grooves 7 are uniformly distributed on the rotor punching sheet 2 along the circumferential direction, so that the salient pole ratio of the motor is improved, and the salient pole ratio of the permanent magnet auxiliary synchronous reluctance motor is a decisive parameter influencing the high efficiency and high torque of the motor. The ventilation opening 6 has good exhaust performance, reduces the temperature of the motor and improves the operation efficiency of the motor.

As shown in fig. 2, comprises an inner magnetic bridge 8 and a permanent magnet 9; the inner magnetic bridges 8 are distributed at the joints of the W-shaped grooves 7, and the permanent magnets 9 are placed in the W-shaped grooves 7. The arrangement of the inner magnetic bridges 8 contributes to the mechanical strength of the rotor.

In the present invention, the principles and embodiments of the present invention are described by specific examples, and the above description of the embodiments is only for assisting understanding of the basic method and idea of the present invention; also, the manner in which the concepts of the present invention are applied and the scope of application have changed to those of ordinary skill in the art. In view of the above, the contents of the specification should not be construed as limiting the present invention.

Claims

1. The utility model provides a novel synchronous reluctance motor structure is assisted to permanent magnetism, its characterized in that includes stator core, rotor punching, stator chute, auxiliary tank, motor shaft, vent, W type groove, interior magnetic bridge and permanent magnet, the rotor punching embedded in the stator core, the rotor punching with the stator core is coaxial, the motor shaft is established rotor punching center department, the stator chute is skew radial 15 degrees angles, auxiliary tank symmetric distribution is in on the stator core, W type groove is in along circumferencial direction evenly distributed on the rotor punching, interior magnetic bridge distributes in W type groove junction, the permanent magnet place in W type inslot, vent evenly distributed is in on the rotor punching.