CN-113890220-B - Harmonic magnetic field driving motor

Abstract

A harmonic magnetic field driving motor comprises a plurality of tooth grooves which are arranged on a stator lamination, wherein the number of the tooth grooves is Z, B, on a 360-degree mechanical space of a stator circumference, stator windings are divided into m phases according to a set connection rule, C, a stator assembly with windings is independently arranged in a free space, direct current constant current is applied to any one phase winding, the number of pole pairs of a formed phase winding magnetic field is Pm on the 360-degree mechanical space of the stator circumference, D, the number of coils contained in each phase winding is k=n×Pm (n=1, 2, 3.), E, permanent magnet rotor magnetic steels are sequentially arranged in the circumferential direction according to the sequence of N poles and S poles, the number of pole pairs of the formed rotor magnetic steels is Pr on the 360-degree mechanical space of the rotor circumference, F, a motor air gap is formed in the combined space, and the number of pole pairs Pr of the rotor of the harmonic magnetic field driving motor must meet the conditions that Pr=Z±Pm, wherein the number of the stator grooves of the harmonic magnetic field driving motor is Z=2×m×k.

Inventors

• ZHOU JIANMIN
• HE HAILIANG
• XU NINGNING
• LIU PEIHAI

Assignees

• 宁波恒帅股份有限公司

Dates

Publication Date

20260508

Application Date

20210819

Claims (2)

1. 1. A harmonic magnetic field drive motor, comprising: A. A plurality of tooth grooves are formed in the stator lamination of the stator assembly, and the number of the tooth grooves is Z; B. on 360-degree mechanical space of the circumference of the stator assembly, the stator winding is divided into m phases according to a set connection rule; C. the stator assembly with the stator windings is independently arranged in a free space, a direct current constant current is supplied to any one phase winding, and the pole pair number of a formed phase winding magnetic field is Pm on the 360-degree mechanical space of the circumference of the stator assembly; D. the number of coils included in each phase winding is k=n×pm, n=1, 2,3. E. the permanent magnets of the rotor assembly are sequentially arranged in the circumferential direction according to the sequence of N poles and S poles, and the pole pair number of the formed permanent magnet magnetic field is Pr on a 360-degree mechanical space along the circumference of the rotor; F. forming a motor air gap in the combined space on 360-degree mechanical space of the circumferences of the stator assembly and the rotor assembly; characterized in that the Pr must satisfy the formula pr=zstrpm, wherein z=2×m×k; the control module of the harmonic magnetic field driving motor is fixed to the stator assembly through a positioning column and an elastic fixing clamp which are arranged on the stator assembly.
2. 2. The harmonic field drive motor of claim 1 wherein Z=12, pr=13, pm=1, and k=2.

Description

Harmonic magnetic field driving motor Technical Field The invention relates to a motor, in particular to a harmonic magnetic field driving motor. Background The motor is used as a device for converting electric energy into rotary mechanical energy, and becomes an indispensable and indisputable core device for people to pursue good life. The permanent magnet motor has the advantages of small volume, relatively high efficiency and the like, is widely applied to various industries, particularly the rare earth permanent magnet material has the remarkable advantage of high magnetic energy product, is widely applied to the fields of direct current brushless motors (BLDC) and Permanent Magnet Synchronous Motors (PMSM), and becomes the development direction and trend of leading the main flow of motors. Because rare earth permanent magnet materials belong to non-renewable resources, how to fully improve the utilization rate of the materials becomes an important subject of research in countries around the world. Therefore, compared with the traditional motor, the harmonic magnetic field driving motor is urgently needed to be designed, the motor volume can be reduced under the condition of the same output power, which means that the weight of the motor is synchronously reduced, the use cost of motor materials, particularly the cost of rare earth permanent magnet materials, can be obviously saved, and the competitive advantage of products is greatly improved. Disclosure of Invention The invention aims to provide a harmonic magnetic field driving motor aiming at the defects of the prior art, so that the volume can be reduced and the power density can be improved. The invention solves the problems by adopting the technical scheme that the harmonic magnetic field driving motor comprises a rotor assembly, a stator assembly, a control module and a wire harness, wherein the wire harness is connected with the control module through welding, the control module is fixed on the stator assembly through a positioning column and an elastic fixing clamp, the wire harness penetrates through a radial hole arranged on the stator assembly and is led out from an axial hole, a cylindrical bearing arranged on the stator assembly plays a supporting and positioning role on the rotor assembly, the harmonic magnetic field driving motor is electrified, and the rotor assembly rotates along the circumferential direction, and the main structure is expressed as follows: A. A plurality of tooth grooves are formed in the stator lamination, and the number of the tooth grooves is Z; B. on the 360-degree mechanical space of the circumference of the stator, the stator winding is divided into m phases according to a set connection rule; C. the stator assembly with windings is independently placed in a free space (without motor assembly), a direct-current constant current is conducted to any phase winding, and the pole pair number of a formed phase winding magnetic field is Pm on a 360-degree mechanical space of the circumference of the stator; D. The number of coils included in each phase winding is k=n×pm (n=1, 2, 3.); E. The permanent magnet rotor magnetic steels are sequentially arranged in the circumferential direction according to the N pole and the S pole sequence, and the pole pair number of the formed rotor magnetic steels is Pr on a 360-degree mechanical space along the circumference of the rotor; F. an air gap of the motor is formed in the combined space on 360-degree mechanical space of the circumference of the stator and the rotor. The embodiment of the invention is designed as stator slot number Z=12, rotor magnetic steel pole pair number Pr=13, phase line package pole pair number Pm=1, and phase line package number k=2. More specifically, the harmonic magnetic field driving motor of the present invention is further described: The principle of the harmonic magnetic field driving motor is that A. The necessary condition for the rotation of a motor rotor is that the pole pair number of a magnetic field generated by a stator winding in a motor air gap is equal to the pole pair number of a rotor permanent magnet no matter used for BLDC control or PMSM control, B. After the stator winding is electrified, fundamental magnetomotive force is generated in the motor air gap, a series of harmonic magnetic fields are distributed along the air gap space under the action of stator tooth slot magnetic conductance, C. When the pole pair number of a specific air gap harmonic magnetic field is equal to the pole pair number Pr of a permanent magnet rotor, stable electromagnetic force moment can be output. To satisfy the principle of a harmonic magnetic field drive motor, the following conditions must be met: A. The number of pole pairs Pr of the rotor of the harmonic magnetic field driving motor must meet the following specific expression: ① Sigma H×L=W×I=F, where H is the magnetic field strength, L is the magnetic path length, W is the line, according to amper