CN116526796A

CN116526796A - Hybrid excitation multiphase reluctance motor and power generation system

Info

Publication number: CN116526796A
Application number: CN202310038542.7A
Authority: CN
Inventors: 寇宝泉; 赵元胜; 张浩泉
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2023-08-01
Also published as: CN111969822B; CN110545021A; CN110545021B; CN111969822A

Abstract

A mixed excitation multiphase reluctance motor and a power generation system belong to the field of motors. The invention solves the problem of narrow magnetic field adjusting range of the existing hybrid excitation reluctance motor. By adopting a mixed excitation electromagnetic structure of current and permanent magnet common excitation, the adjustable air-gap magnetic field is realized, and the excitation loss is reduced; the exciting winding and the armature winding are both arranged on the stator, and the rotor is not provided with an electric brush and a slip ring, so that the system has high reliability and convenient maintenance, and the motor structure is changed by changing the winding mode and the permanent magnet distribution mode of the exciting winding and the armature winding. The invention is suitable for the fields of new energy power generation, flywheel energy storage, electric vehicle driving and the like of airplanes, ships, locomotive power supplies, wind energy, solar energy, ocean wave energy and the like.

Description

Hybrid excitation multiphase reluctance motor and power generation system

Technical Field

The invention relates to a hybrid excitation multiphase reluctance motor system, and belongs to the field of motors.

Background

The air gap flux density of the hybrid excitation motor is generated by the permanent magnet and the electric excitation winding together, and the magnetic field change part required by the rotation speed (or voltage) adjustment is realized by the auxiliary electric excitation winding. When the direction of the electric excitation magnetic field is the same as that of the permanent magnetic field, the air gap magnetic field is enhanced; when the direction of the electric excitation magnetic field is opposite to that of the permanent magnetic field, the air gap field is weakened. Therefore, by adjusting the current magnitude and direction of the electric excitation winding, not only the field weakening control of the motor can be realized, but also the magnetization control can be performed. The hybrid excitation motor not only inherits the characteristics of high efficiency, large torque/mass ratio and the like of the permanent magnet motor, but also has the advantages of large starting torque and wide speed regulation range when the motor is operated electrically, and has smooth and adjustable air gap field; when in power generation operation, the device has wider voltage regulation capability or wide-range variable-speed constant-voltage output capability. The magnetic field adjusting means of the hybrid excitation motor is simple and direct, and the independent adjustment and control of the motor air gap magnetic field are realized. Therefore, the method has wide application prospect.

Fig. 11 is a sectional view of a three-phase 12/8-pole hybrid excitation doubly salient reluctance motor, wherein a stator and a rotor are of a doubly salient structure, no winding and no permanent magnet are arranged on the rotor, the stator adopts a centralized winding, coils on spatially opposite teeth are connected in pairs, and two groups of coils are connected in series or in parallel to form a three-phase armature winding. Four permanent magnets which are tangentially punched by adopting high-performance permanent magnet materials are embedded in the yoke part of the stator to form a main magnetic field of an air gap of the motor; and an electric excitation winding is arranged in a stator slot adjacent to the permanent magnet. In order to improve the efficiency of electric excitation, the electric excitation with smaller size can obtain larger magnetic field adjusting capability, and a certain size of iron core magnetic conduction bridge is reserved between the permanent magnet and the electric excitation winding in the motor structure. The permanent magnet magnetic leakage is utilized to enable the magnetic conduction bridge to work in a relative saturation state, and the additional parallel magnetic shunt is provided for the electric excitation winding through reasonable selection of the size of the saturated magnetic conduction bridge, so that the purpose of obtaining a larger air gap magnetic flux adjusting range by using smaller direct current excitation magnetic potential is achieved.

However, this motor has the following disadvantages: the magnetic flux provided by the permanent magnet is less, the magnetic circuit flux guide of the series magnetic circuit mixed excitation is small, the excitation current is large, and the magnetic field adjusting range is narrow; the stator core is split along the circumference, and the structural strength of the stator is poor.

Disclosure of Invention

The invention provides a hybrid excitation multiphase reluctance motor and a power generation system, which aim to solve the problem of narrow magnetic field adjusting range of the existing hybrid excitation reluctance motor. The following is a specific structure of 9 kinds of mixed excitation multiphase reluctance motors and a specific structure of a set of power generation system, which are provided by the invention, so as to solve the problems.

The first structure:

the mixed excitation multiphase reluctance motor comprises a stator and a rotor, wherein the stator and the rotor are coaxial and have an air gap, and the rotor is positioned in the stator;

the rotor consists of a rotor core, grooves are formed on the air gap side of the rotor core along the axial direction, and the formed teeth and grooves are alternately arranged along the circumferential direction in sequence;

the stator consists of a stator core, m-phase symmetrical armature windings, exciting windings and permanent magnets; wherein m is the phase number of the motor;

the stator iron core is of a cylindrical structure, grooves are formed in the air gap side of the stator iron core along the axial direction, and the formed teeth and grooves are alternately arranged in sequence along the circumferential direction; the air gap side of the stator core is formed into 4Pmk teeth, and 4Pmk teeth are formed by 2Pmk long teeth and 2Pmk short teeth, and the long teeth and the short teeth are alternately distributed; wherein P is the pole pair number of the motor, and k is a positive integer;

the root of each long tooth is wound with an excitation coil, the winding directions of the excitation coils on the adjacent mk long teeth are the same, the excitation coils on the adjacent mk long teeth are sequentially connected in series end to form 1 excitation coil group, the winding directions of the excitation coils in the adjacent two excitation coil groups are opposite, and all the excitation coil groups are connected in series to form an excitation winding, wherein the number of the excitation coil groups is 2P;

Permanent magnets are embedded in grooves between the long teeth and the short teeth, the permanent magnets are magnetized tangentially, and magnetizing directions of the permanent magnets on the left side and the right side of each long tooth are opposite;

the magnetizing modes of the permanent magnets at the notches on the two sides of the long teeth wound by each exciting coil group are the same;

the magnetizing modes of the permanent magnets at the notches on two sides of the long teeth wound by the two adjacent exciting coil groups are opposite;

the m-phase symmetric armature windings are embedded in the slots between all adjacent long teeth.

Preferably, the permanent magnet is elongated.

The second structure:

the stator iron core is of a cylindrical structure, grooves are formed in the air gap side of the stator iron core along the axial direction, and the formed teeth and grooves are alternately arranged in sequence along the circumferential direction;

the air gap side of the stator iron core is formed into 2Pmk teeth, each tooth is wound with an excitation coil, the winding directions of the excitation coils on every adjacent mk teeth are the same, the excitation coils on the adjacent mk teeth are sequentially connected in series end to form an excitation coil group, the winding directions of the excitation coils in the two adjacent excitation coil groups are opposite, all the excitation coil groups are connected in series to form an excitation winding, wherein the number of the excitation coil groups is 2P, P is the pole pair number of a motor stator magnetic field, and k is a positive integer;

The armature windings with m phases being symmetrical are embedded in grooves formed on the air gap side of the stator core;

j shallow grooves are formed in the air gap surface of each tooth along the axial direction, a permanent magnet is fixed in each shallow groove, the permanent magnets are magnetized radially or in parallel, and j is a positive integer;

the magnetizing directions of j permanent magnets adhered to each tooth are the same;

the magnetizing directions of the permanent magnets on mk teeth wound by each 1 exciting coil group are the same, and the magnetizing directions of the permanent magnets on teeth wound by two adjacent exciting coil groups are opposite.

Preferably, the permanent magnets are tile-shaped or flat-plate-shaped.

And a third structure:

the rotor is characterized by comprising a rotor core, wherein the air gap side of the rotor core is axially grooved, and the formed teeth and grooves are alternately arranged in turn along the circumferential direction;

the air gap side of the stator core is formed into 2Pmk teeth, each adjacent mk teeth is wound with one exciting coil, the winding directions of the two adjacent exciting coils are opposite, all the exciting coils are connected in series to form an exciting winding, wherein the number of the exciting coils is 2P, P is the pole pair number of a motor stator magnetic field, and k is a positive integer;

the magnetizing directions of the permanent magnets on mk teeth wound by each exciting coil are the same, and the magnetizing directions of the permanent magnets on the teeth wound by the adjacent two exciting coils are opposite.

Preferably, the permanent magnets are tile-shaped or flat-plate-shaped.

Fourth structure:

the stator consists of a stator core, m-phase symmetrical armature windings, exciting windings and permanent magnets; wherein m is the phase number of the motor, and m is more than or equal to 3;

the stator core is of a cylindrical structure, grooves are formed in the air gap side of the stator core along the axial direction, the formed teeth and grooves are alternately arranged in sequence along the circumferential direction, and the air gap side of the stator core is formed into 2mk teeth, wherein k is a positive integer;

Of 2mk teeth formed on the stator core, every two adjacent teeth are divided into a group along the circumferential direction, so that mk groups of teeth are formed, each group of teeth is wound with an armature coil, and all armature coils are connected into m-phase symmetrical armature windings;

each tooth of the stator core is also wound with an excitation coil, the winding directions of the excitation coils on adjacent teeth are opposite, and the excitation coils on all the teeth are connected in series to form an excitation winding;

j shallow slots are formed in the axial direction of each tooth air gap surface of the stator core, a permanent magnet is fixed in each shallow slot, the permanent magnets are magnetized radially or in parallel, and j is a positive integer;

the magnetizing directions of the permanent magnets on the two teeth surrounded by the same armature coil are opposite,

the permanent magnets on adjacent teeth surrounded by adjacent armature coils have the same magnetizing direction.

Preferably, the permanent magnets are tile-shaped or flat-plate-shaped.

Preferably, a magnetic shield is embedded in each slot adjacent to the teeth to which the permanent magnets are affixed.

A fifth structure:

the stator consists of a stator core, m-phase symmetrical armature windings, exciting windings and permanent magnets; wherein m is the phase number of the motor, and m is more than or equal to 3; the method comprises the steps of carrying out a first treatment on the surface of the

with four adjacent teeth as a group, 2mk teeth are divided into mk/2 groups, each of which: the first two teeth are wound with an armature coil together, all the armature coils are connected into m-phase symmetrical armature windings, the second two teeth are wound with an excitation coil respectively, the winding directions of the two excitation coils are opposite, and all the excitation coils are connected in series to form an excitation winding;

the air gap surfaces of two teeth surrounded by the same armature coil are provided with j shallow grooves along the axial direction, a permanent magnet is stuck in each shallow groove, the magnetizing directions of the j permanent magnets stuck on the teeth wound with the armature coil are the same, the permanent magnets are radial magnetizing or parallel magnetizing, and j is a positive integer;

the magnetizing directions of the permanent magnets on the two teeth surrounded by the same armature coil are opposite;

Preferably, the permanent magnets are tile-shaped or flat-plate-shaped.

A sixth structure:

the stator iron core is of a cylindrical structure, grooves are formed in the air gap side of the stator iron core along the axial direction, and the formed teeth and grooves are alternately arranged in sequence along the circumferential direction; the air gap side of the stator core is formed into 3km teeth, wherein k is a positive integer;

among 3km teeth formed on a stator iron core, every adjacent three teeth are divided into a group along the circumferential direction in turn to form mk groups of teeth altogether, wherein the first two teeth in each group of teeth are wound with an armature coil, and all the armature coils are connected into m-phase symmetrical armature windings;

the magnetizing directions of the permanent magnets on the adjacent teeth surrounded by the adjacent armature coils are the same;

each tooth without permanent magnet is wound with an exciting coil, the winding directions of adjacent exciting coils are opposite, and all exciting coils are connected in series to form an exciting winding.

Preferably, the permanent magnets are tile-shaped or flat-plate-shaped.

Seventh structure:

The stator core is of a cylindrical structure, the air gap sides of the stator core are axially grooved, the formed teeth and grooves are sequentially and alternately arranged along the circumferential direction, the air gap sides of the stator core form 2km teeth, each odd or even tooth is wound with an armature coil along the circumferential direction, and all the armature coils are connected into m-phase symmetrical armature windings; wherein k is a positive integer;

j shallow grooves are formed in the axial direction of the air gap surface of each tooth wound with the armature coil, a permanent magnet is fixed in each shallow groove, the permanent magnets are magnetized radially or in parallel, and j is a positive integer;

the magnetizing directions of j permanent magnets adhered to the teeth around which the armature coils are wound are the same, and the magnetizing directions of the permanent magnets on the teeth around which the armature coils are adjacent are the same;

Preferably, the permanent magnets are tile-shaped or flat-plate-shaped.

Eighth structure:

the magnetizing directions of j permanent magnets adhered on each tooth are the same, and the magnetizing directions of the permanent magnets on adjacent teeth are opposite;

each tooth which is not wound with the armature coil is wound with one exciting coil, the winding directions of adjacent exciting coils are opposite, and all the exciting coils are connected in series to form an exciting winding.

Preferably, the permanent magnets are tile-shaped or flat-plate-shaped.

Ninth structure:

the stator core is of a cylindrical structure, slots are formed in the air gap side of the stator core along the axial direction, the formed teeth and slots are orderly and alternately arranged along the circumferential direction, and the air gap side of the stator core is formed into 2km teeth, wherein k is a positive integer;

each tooth of the stator core is wound with an armature coil, and all armature coils are connected into m-phase symmetrical armature windings;

the magnetizing directions of the j permanent magnets adhered on each tooth are the same, and the magnetizing directions of the permanent magnets on the adjacent teeth are opposite.

Preferably, the permanent magnets are tile-shaped or flat-plate-shaped.

The power generation system is realized by adopting any one of the hybrid excitation multiphase reluctance motors, and the system also comprises a power converter and a direct current excitation power supply;

driving a rotor of the reluctance motor to rotate through a prime motor inertia flywheel;

the DC excitation power supply is used for supplying power to the excitation winding of the reluctance motor so as to regulate the air gap field between the stator and the rotor of the reluctance motor, when the rotor of the reluctance motor rotates, the magnetic force lines of the air gap field are changed with the magnetic flux of the armature winding of the reluctance motor, counter electromotive force is generated on the armature winding, the counter electromotive force generated by the armature winding is subjected to power conversion through the power converter, and the converted electric energy supplies power to the pulse load.

The invention has the beneficial effects that the invention relates to a mixed excitation multiphase reluctance motor system, and the mixed excitation electromagnetic structure of current and permanent magnet common excitation is adopted, so that the air gap magnetic field is adjustable, and the excitation loss is reduced; the rotor has simple structure and high strength, is suitable for high-speed operation, and has small volume and light weight; the exciting winding and the armature winding are arranged on the stator, the rotor is not provided with an electric brush and a slip ring, the reliability of the system is high, the cost is low, and the maintenance is convenient; no additional air gap exists in the electric excitation magnetic flux path, the excitation power is low, and the system efficiency is high; the air gap magnetic field is simple to adjust and has a large adjusting range.

The hybrid excitation multiphase reluctance motor can be used as a motor and a generator, and is operated as a motor, and has the advantages of large starting torque and wide constant power speed regulation range; when the generator is operated as a generator, the generator has wider voltage regulation capability or wide-range variable-speed constant-voltage output capability.

The hybrid excitation multiphase reluctance motor system has the characteristics of simple structure, small volume, light weight, high reliability, adjustable air gap magnetic field and the like, and has good application prospects in the fields of power generation of new energy sources such as aircrafts, ships, locomotive power sources, wind energy, solar energy, ocean wave energy and the like, flywheel energy storage, electric vehicle driving and the like.

Drawings

FIG. 1 is a cross-sectional view of a hybrid excitation multiphase reluctance motor according to embodiment 1;

FIG. 2 is a cross-sectional view of a hybrid excitation multiphase reluctance motor according to embodiment 2;

fig. 3 and 4 are each a sectional view of the hybrid-excitation multiphase reluctance motor described in embodiment 3;

FIG. 5 is a cross-sectional view of a hybrid excitation multiphase reluctance motor according to embodiment 4;

FIG. 6 is a cross-sectional view of a hybrid excitation multiphase reluctance motor according to embodiment 5;

FIG. 7 is a cross-sectional view of a hybrid excitation multiphase reluctance motor according to embodiment 6;

FIG. 8 is a cross-sectional view of a hybrid excitation multiphase reluctance motor according to embodiment 7;

FIG. 9 is a cross-sectional view of a hybrid excitation multiphase reluctance motor according to embodiment 8;

fig. 10 is a sectional view of a hybrid excitation multiphase reluctance motor according to embodiment 9;

FIG. 11 is a cross-sectional view of a three-phase 12/8 pole hybrid excitation doubly salient reluctance motor in the prior art; reference numeral 3 is a magnetic bridge;

fig. 12 is a schematic diagram of a generator system implemented using the hybrid-excitation multiphase reluctance motor according to embodiment 11.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.

Nine different configurations of the hybrid-excitation multiphase reluctance motor are provided for the present invention, see in particular embodiments 1 to 9.

Example 1:

referring to fig. 1, a hybrid excitation multiphase reluctance motor according to the embodiment 1 is described, which includes a stator 1 and a rotor 2, both of which are coaxial and have an air gap, the rotor 2 being located in the stator 1;

the rotor 2 is composed of a rotor core, slots are formed on the air gap side of the rotor core along the axial direction, and the formed teeth and slots are alternately arranged along the circumferential direction in turn;

the stator 1 is composed of a stator core 1-1, m-phase symmetrical armature windings 1-2, exciting windings and permanent magnets 1-4; wherein m is the phase number of the motor;

the stator core 1-1 is of a cylindrical structure, slots are formed on the air gap side of the stator core along the axial direction, and the formed teeth and slots are alternately arranged in turn along the circumferential direction; the air gap side of the stator core 1-1 is formed into 4Pmk teeth, and 4Pmk teeth are formed by 2Pmk long teeth 1-1-1 and 2Pmk short teeth 1-1-2, and the long teeth 1-1-1 and the short teeth 1-1-2 are alternately distributed; wherein P is the pole pair number of the motor, and k is a positive integer;

the tooth root of each long tooth 1-1-1 is wound with one excitation coil 1-3, the winding directions of the excitation coils 1-3 on the adjacent mk long teeth 1-1-1 are the same, the excitation coils 1-3 on the adjacent mk long teeth 1-1-1 are sequentially connected in series end to form 1 excitation coil group, the winding directions of the excitation coils 1-3 in the adjacent two excitation coil groups are opposite, and all the excitation coil groups are connected in series to form an excitation winding, wherein the number of the excitation coil groups is 2P;

Permanent magnets 1-4 are embedded in grooves between the long teeth 1-1-1 and the short teeth 1-1-2, the permanent magnets 1-4 are magnetized tangentially, and magnetizing directions of the permanent magnets 1-4 on the left side and the right side of each long tooth 1-1-1 are opposite; the magnetizing modes of the permanent magnets 1-4 at the notches on the two sides of the long tooth 1-1-1 wound by each exciting coil group are the same; the magnetizing modes of the permanent magnets 1-4 at the notches on two sides of the long tooth 1-1 wound by the two adjacent exciting coil groups are opposite;

the m-phase symmetric armature windings 1-2 are embedded in the slots between all adjacent two long teeth 1-1-1.

The permanent magnet 1-4 of this embodiment 1 is embedded in the groove between the long tooth 1-1-1 and the short tooth 1-1-2, and each long tooth 1-1-1 is excited individually, and this structure is a parallel magnetic circuit, and excitation efficiency is high, and the permanent magnet does not have the risk of demagnetizing.

The structure of the embodiment 1 can effectively regulate the air gap magnetic field, has good weak magnetic energy, is a distributed winding structure, and can realize high-speed operation.

In fig. 1, the values of m are 3, p are 4, k are 1, the total number of the long teeth 1-1-1 is 24, the exciting coils on every adjacent 6 long teeth 1-1-1 are sequentially connected in series end to form 1 exciting coil group, the winding directions of exciting coils of two adjacent exciting coil groups are opposite, and 4 exciting coil groups of the whole stator are connected in series to form an exciting winding. The three-phase symmetrical armature winding is embedded in the deep groove between the long teeth 1-1-1. Permanent magnets 1-4 are embedded in the notch between the long teeth 1-1-1 and the short teeth 1-1-2, the permanent magnets 1-4 are magnetized tangentially, the magnetizing directions of the permanent magnets at two adjacent notches of each long tooth 1-1-1 are opposite, and the magnetizing directions of the permanent magnets 1-4 at the notches corresponding to the 6 long teeth 1-1-1 are the same; the magnetizing directions of permanent magnets at the positions of the corresponding notches of the long teeth 1-1-1 wound by the adjacent two-pole exciting coil groups are opposite.

The preferred embodiment is described with reference to fig. 1. The preferred form of example 1 is that the permanent magnets 1-4 are elongated.

Example 2:

referring to fig. 1, a hybrid excitation multiphase reluctance motor according to the present embodiment 2 is described, and includes a stator 1 and a rotor 2, which are coaxial and have an air gap, and the rotor 2 is located in the stator 1;

the stator core 1-1 is of a cylindrical structure, slots are formed on the air gap side of the stator core along the axial direction, and the formed teeth and slots are alternately arranged in turn along the circumferential direction;

the air gap side of the stator core 1-1 is formed into 2Pmk teeth in a conformal way, each tooth is wound with one exciting coil 1-3, the winding directions of the exciting coils 1-3 on every adjacent mk teeth are the same, the exciting coils 1-3 on the adjacent mk teeth are sequentially connected in series end to form an exciting coil group, the winding directions of the exciting coils 1-3 in the two adjacent exciting coil groups are opposite, all the exciting coil groups are connected in series to form an exciting winding, wherein the number of the exciting coil groups is 2P, P is the pole pair number of a motor stator magnetic field, and k is a positive integer;

The armature windings 1-2 with m phases being symmetrical are embedded in slots formed on the air gap side of the stator core 1-1;

j shallow grooves are formed in the air gap surface of each tooth along the axial direction, a permanent magnet 1-4 is fixed in each shallow groove, the permanent magnets 1-4 are magnetized radially or in parallel, and j is a positive integer;

the magnetizing directions of j permanent magnets 1-4 adhered to each tooth are the same;

the magnetizing directions of the permanent magnets 1-4 on mk teeth wound by each 1 exciting coil group are the same, and the magnetizing directions of the permanent magnets 1-4 on teeth wound by two adjacent exciting coil groups are opposite.

The permanent magnets 1-4 of this embodiment 2 are disposed at the tooth tops, each tooth is excited individually, the m-phase symmetric armature windings can be arranged in the slots formed on the air gap side of the stator core 1-1 in a centralized or distributed manner, and compared with the structure of the conventional permanent magnets embedded on the stator teeth, the structure has improved mechanical strength, the design of the permanent magnets is more flexible and various, the stator teeth can be provided with a structure of a magnetic bridge, and the magnetic resistance of the electro-magnetic circuit is ensured to be smaller, wherein the magnetic bridge is arranged at the position between the adjacent permanent magnets on each tooth.

This structure of embodiment 2 can realize magnetic field adjustment by changing the magnitude of the exciting current, and the range of the magnetic field is determined by the exciting current density, and the efficiency of electric excitation is high due to the structure of the magnetic bridge, and the current density required for this structure is smaller in the same magnetic adjustment range.

In fig. 2, 24 teeth are formed on the stator core 1-1, m has a value of 3, p has a value of 4, k has a value of 1, each stator core 1-1 tooth is wound with an exciting coil, the winding directions of the exciting coils on every adjacent 6 teeth are the same, the exciting coils on the 6 teeth are sequentially connected in series end to form 1 exciting coil group, the winding directions of the exciting coils of the adjacent two-pole exciting coil groups are opposite, and the 4 exciting coil groups of the whole stator are connected in series to form an exciting winding. The three-phase symmetrical armature winding is embedded in the armature core slot. 2 permanent magnets 1-4 with the same magnetizing direction are adhered on the surface of each tooth, the permanent magnets 1-4 are radially magnetized, the magnetizing directions of the permanent magnets 1-4 on 6 teeth wound by each 1 exciting coil group are the same, and the magnetizing directions of the permanent magnets 1-4 on the teeth wound by the adjacent two-pole exciting coil groups are opposite.

The preferred embodiment is described with reference to fig. 2. The preferred form of example 2 is that the permanent magnets 1-4 are tile-shaped or plate-shaped.

Example 3:

referring to fig. 3 and 4, the hybrid excitation multiphase reluctance motor according to embodiment 3 includes a stator 1 and a rotor 2, which are coaxial and have an air gap, and the rotor 2 is located in the stator 1;

the air gap side of the stator core 1-1 is formed into 2Pmk teeth, each adjacent mk teeth is wound with one exciting coil 1-3, the winding directions of the two adjacent exciting coils 1-3 are opposite, all the exciting coils 1-3 are connected in series to form an exciting winding, wherein the number of the exciting coils 1-3 is 2P, P is the pole pair number of a motor stator magnetic field, and k is a positive integer;

the magnetizing directions of the permanent magnets 1-4 on mk teeth wound by each exciting coil 1-3 are the same, and the magnetizing directions of the permanent magnets 1-4 on the teeth wound by the adjacent two exciting coils 1-3 are opposite.

The permanent magnet 1-4 of this embodiment 3 is disposed at the tooth top, mk teeth wound by each exciting coil are excited intensively, m-phase symmetric armature windings can be arranged in slots formed on the air gap side of the stator core 1-1 in a centralized or distributed manner, the magnetic field directions on three teeth wound by each exciting coil in fig. 3 and 4 are the same, and the structure of the magnetic bridge can be designed to reduce the reluctance of the electric exciting circuit.

This configuration of fig. 3 and 4 allows the magnetic field on the three teeth around which each field coil is wound to be adjusted by adjusting the magnitude of an electrical field current, thereby changing the air gap density.

In fig. 3, 12 teeth are formed on the stator core 1-1, m has a value of 3, p has a value of 2, k has a value of 1, each adjacent 3 teeth is wound with one exciting coil to form 1 exciting coil, the winding directions of the adjacent two exciting coils are opposite, and 4 exciting coils of the whole stator are connected in series to form an exciting winding. The three-phase symmetrical armature winding is embedded in the armature core slot, and the armature winding is a non-overlapping winding. 2 permanent magnets 1-4 with the same magnetizing direction are stuck on the surface of each tooth; the magnetizing directions of the permanent magnets 1-4 on the 3 teeth wound by each 1 exciting coil are the same, and the magnetizing directions of the permanent magnets 1-4 on the teeth wound by the adjacent two exciting coils are opposite.

In fig. 4, 24 teeth are formed on the stator core 1-1, m has a value of 3, p has a value of 4, k has a value of 1, each adjacent 3 teeth is wound with one exciting coil to form 1 exciting coil, the winding directions of the adjacent two exciting coils are opposite, and 8 exciting coils of the whole stator are connected in series to form an exciting winding. The three-phase symmetrical armature winding is embedded in the armature core slot. 2 permanent magnets 1-4 with the same magnetizing direction are adhered on the surface of each tooth, the magnetizing directions of the permanent magnets 1-4 on 3 teeth wound by each 1 exciting coil are the same, and the magnetizing directions of the permanent magnets 1-4 on the teeth wound by two adjacent exciting coils are opposite.

The preferred embodiment is described with reference to fig. 3 and 4, and the preferred form of example 3 is that the permanent magnets 1-4 are tile-shaped or flat-plate-shaped.

Example 4:

referring to fig. 5, a hybrid excitation multiphase reluctance motor according to the present embodiment 4 is described, and includes a stator 1 and a rotor 2, which are coaxial and have an air gap, and the rotor 2 is located in the stator 1;

the stator 1 is composed of a stator core 1-1, m-phase symmetrical armature windings, exciting windings and permanent magnets 1-4; wherein m is the phase number of the motor, and m is more than or equal to 3;

The stator core 1-1 is of a cylindrical structure, grooves are formed in the air gap side of the stator core along the axial direction, the formed teeth and grooves are alternately arranged in sequence along the circumferential direction, and 2mk teeth are formed on the air gap side of the stator core 1-1 in a conformal manner, wherein k is a positive integer;

of 2mk teeth formed on the stator core 1-1, two teeth adjacent to each other in turn are divided into one group along the circumferential direction, so as to form mk groups of teeth, each group of teeth is wound with one armature coil 1-2, and all the armature coils 1-2 are connected into m-phase symmetrical armature windings;

each tooth of the stator core 1-1 is also wound with an excitation coil 1-3, the winding directions of the excitation coils 1-3 on adjacent teeth are opposite, and the excitation coils 1-3 on all the teeth are connected in series to form an excitation winding;

j shallow slots are formed in the axial direction of each tooth air gap surface of the stator core 1-1, a permanent magnet 1-4 is fixedly adhered in each shallow slot, the permanent magnets 1-4 are magnetized radially or in parallel, and j is a positive integer;

the magnetizing directions of the permanent magnets 1-4 on the two teeth surrounded by the same armature coil 1-2 are opposite,

the permanent magnets 1-4 on adjacent teeth surrounded by adjacent armature coils 1-2 are magnetized in the same direction.

The permanent magnets 1 to 4 of this embodiment 4 are provided at the tooth tops, each of which is individually excited, and this structure is a flux reversing motor.

This structure of embodiment 4 is a flux reversing motor structure that can adjust the magnetic field on each tooth to vary the air gap field strength.

In fig. 5, 24 teeth are formed on the stator core 1-1, m has a value of 3, k has a value of 4, one armature coil is wound on the 1 st and 2 nd teeth of the stator core 1-1, one armature coil is wound on the 3 rd and 4 th teeth, and so on, all the armature coils are connected into three-phase symmetrical armature windings. 2 permanent magnets 1-4 with the same magnetizing direction are stuck on the surface of each tooth, and the permanent magnets 1-4 are radially magnetized; the magnetizing directions of the permanent magnets 1-4 on the two teeth surrounded by the same coil are opposite, and the magnetizing directions of the permanent magnets 1-4 on the adjacent teeth surrounded by the adjacent coils are the same. Each tooth of the stator core 1-11-1 is also wound with an excitation coil, the winding directions of the excitation coils on adjacent teeth are opposite, and the excitation coils on all the teeth are connected in series to form an excitation winding.

The preferred embodiment is described with reference to fig. 5, and the preferred form of example 4 is that the permanent magnets 1-4 are tile-shaped or flat-plate-shaped.

The preferred embodiment is illustrated with reference to fig. 5, example 4, in which a magnetic shield is embedded in each groove adjacent to the teeth to which the permanent magnets 1-4 are attached. The magnetic shield is composed of a high conductivity material such as copper, aluminum, etc. The magnetic isolation plates can be placed to reduce magnetic leakage among grooves and improve the density of air gaps .

Example 5:

referring to fig. 6, a hybrid excitation multiphase reluctance motor according to the present embodiment is described as embodiment 5, which includes a stator 1 and a rotor 2, both of which are coaxial and have an air gap, the rotor 2 being located in the stator 1;

the stator 1 is composed of a stator core 1-1, m-phase symmetrical armature windings, exciting windings and permanent magnets 1-4; wherein m is the phase number of the motor, and m is more than or equal to 3; the method comprises the steps of carrying out a first treatment on the surface of the

with four adjacent teeth as a group, 2mk teeth are divided into mk/2 groups, each of which: the first two teeth are wound with an armature coil 1-2 together, all the armature coils 1-2 are connected into m-phase symmetrical armature windings, the second two teeth are wound with an excitation coil 1-3 respectively, the winding directions of the two excitation coils 1-3 are opposite, and all the excitation coils 1-3 are connected in series to form an excitation winding;

the air gap surfaces of two teeth surrounded by the same armature coil 1-2 are provided with j shallow grooves along the axial direction, a permanent magnet 1-4 is stuck in each shallow groove, the magnetizing directions of the j permanent magnets 1-4 stuck on the teeth wound with the armature coil 1-2 are the same, the two permanent magnets are radial magnetizing or parallel magnetizing, and j is a positive integer;

The magnetizing directions of the permanent magnets 1-4 on the two teeth surrounded by the same armature coil 1-2 are opposite;

The permanent magnets 1-4 of this embodiment 5 are arranged on the tooth tops surrounded by the armature coils, and one exciting coil is wound on each tooth without the permanent magnets 1-4, and this structure can reduce the amount of permanent magnets and has small electro-magnetic resistance.

In this structure of embodiment 5, since there is no permanent magnet on the tooth where the exciting winding is located, the magnetic resistance is small and the efficiency is high when exciting.

In fig. 6, 40 teeth are formed on the stator core 1-1, m has a value of 5, k has a value of 4, one armature coil is wound on the 1 st and 2 nd teeth of the stator core 1-1, one armature coil is wound on the 5 th and 6 th teeth, and so on, all the armature coils are connected into five symmetrical armature windings. The permanent magnets 1-4 are stuck in shallow grooves on the tooth surfaces surrounded by the armature coils, 2 permanent magnets 1-4 with the same magnetizing direction are stuck and fixed on each tooth surface, the permanent magnets 1-4 are radially magnetized, and the magnetizing directions of the permanent magnets 1-4 on two teeth surrounded by the same armature coil are opposite. Each tooth of the stator core 1-1 without the permanent magnet 1-4 is wound with an exciting coil, the winding directions of the exciting coils on adjacent teeth are opposite, and all the exciting coils are connected in series to form an exciting winding.

The preferred embodiment is described with reference to fig. 6, and the preferred form of example 5 is that the permanent magnets 1-4 are tile-shaped or flat-plate-shaped.

Referring to fig. 6, illustrating the preferred embodiment, example 5 is a preferred embodiment in which a magnetic shield is embedded in each slot adjacent to the teeth to which permanent magnets 1-4 are bonded. The magnetic shield is composed of a high conductivity material such as copper, aluminum, etc. The magnetic isolation plates can be placed to reduce magnetic leakage among grooves and improve the density of air gaps .

Example 6:

referring to fig. 7, a hybrid excitation multiphase reluctance motor according to the present embodiment is described as embodiment 6, which includes a stator 1 and a rotor 2, both of which are coaxial and have an air gap, the rotor 2 being located in the stator 1;

the stator core 1-1 is of a cylindrical structure, slots are formed on the air gap side of the stator core along the axial direction, and the formed teeth and slots are alternately arranged in turn along the circumferential direction; the air gap side of the stator core 1-1 is formed into 3km teeth, wherein k is a positive integer;

among 3km teeth formed on the stator core 1-1, three teeth adjacent to each other in turn are divided into a group along the circumferential direction to form mk groups of teeth altogether, wherein the first two teeth in each group of teeth are wound with one armature coil 1-2, and all the armature coils 1-2 are connected into m-phase symmetrical armature windings;

the magnetizing directions of the permanent magnets 1-4 on adjacent teeth surrounded by the adjacent armature coils 1-2 are the same;

each tooth without the permanent magnet 1-4 is wound with one exciting coil 1-3, the winding directions of the adjacent exciting coils 1-3 are opposite, and all the exciting coils 1-3 are connected in series to form an exciting winding.

The permanent magnets 1-4 of this embodiment 6 are disposed on the tooth tops surrounded by the armature coils, one exciting coil is wound on each tooth without the permanent magnets 1-4, the magnetic field adjustment can be achieved by changing the magnitude of exciting current, and the range of the magnetic field is determined by the exciting current density, wherein the part between the adjacent permanent magnets on each tooth is a magnetic bridge and the structure of the magnetic bridge is adopted, so that the efficiency of electric excitation is high, and the current density required by the structure is smaller under the condition of the same magnetic adjustment range.

In fig. 7, 18 teeth are formed on the stator core 1-1, m has a value of 3, and k has a value of 2; in the circumferential direction, one armature coil is wound around the 1 st and 2 nd teeth of the stator core 1-1, one armature coil is wound around the 4 th and 5 th teeth, and so on, and all the armature coils are connected into three-phase symmetrical windings. The permanent magnets 1-4 are stuck in shallow grooves on the tooth surfaces surrounded by the armature coils, 2 permanent magnets 1-4 with the same magnetizing direction are stuck and fixed on each tooth surface, the permanent magnets 1-4 are radially magnetized or magnetized in parallel, the magnetizing directions of the permanent magnets 1-4 on two teeth surrounded by the same armature coil are opposite, and the magnetizing directions of the permanent magnets 1-4 on adjacent teeth surrounded by two adjacent coils are the same. Each tooth of the stator core 1-1 without the permanent magnet 1-4 is wound with an excitation coil, the winding directions of adjacent excitation coils are opposite, and the excitation coils on all the teeth are connected in series to form an excitation winding.

The preferred embodiment is described with reference to fig. 7, and the preferred form of example 6 is that the permanent magnets 1-4 are tile-shaped or flat-plate-shaped.

Referring to fig. 7, illustrating the preferred embodiment, example 6 is a preferred embodiment in which a magnetic shield is embedded in each slot adjacent to the teeth to which permanent magnets 1-4 are bonded. The magnetic shield is composed of a high conductivity material such as copper, aluminum, etc. The magnetic isolation plates can be placed to reduce magnetic leakage among grooves and improve the density of air gaps .

Example 7:

referring to fig. 8, a hybrid excitation multiphase reluctance motor according to the present embodiment 7 is described, and includes a stator 1 and a rotor 2, which are coaxial and have an air gap, and the rotor 2 is located in the stator 1;

the stator core 1-1 is of a cylindrical structure, slots are formed on the air gap side of the stator core along the axial direction, the formed teeth and slots are alternately arranged in turn along the circumferential direction, the air gap side of the stator core 1-1 is formed into 2km teeth, each odd or even tooth is wound with one armature coil 1-2 along the circumferential direction, and all the armature coils 1-2 are connected into m-phase symmetrical armature windings; wherein k is a positive integer;

j shallow grooves are formed in the axial direction of the air gap surface of each tooth wound with the armature coil 1-2, a permanent magnet 1-4 is stuck in each shallow groove, the permanent magnets 1-4 are magnetized radially or in parallel, and j is a positive integer;

the magnetizing directions of j permanent magnets 1-4 adhered to the teeth around which the armature coils 1-2 are wound are the same, and the magnetizing directions of the permanent magnets 1-4 on the teeth around which the armature coils 1-2 are adjacent are the same;

The permanent magnets 1-4 of this embodiment 7 are disposed on the tooth tops surrounded by the armature coils, one exciting coil is wound on each tooth without the permanent magnets 1-4, the magnetic field adjustment can be achieved by changing the magnitude of exciting current, and the range of the magnetic field is determined by the exciting current density, wherein the part between the adjacent permanent magnets on each tooth is a magnetic bridge and the structure of the magnetic bridge is adopted, so that the efficiency of electric excitation is high, and the current density required by the structure is smaller under the condition of the same magnetic adjustment range.

In fig. 8, 12 teeth are formed on the stator core 1-1, m has a value of 3, and k has a value of 2; an armature coil is wound on each odd or even number of teeth of the stator core 1-1, and all the armature coils are connected into three-phase symmetrical windings. The permanent magnets 1-4 are stuck and fixed in shallow grooves on the tooth surfaces of the stator core 1-1, around which armature coils are wound, 2 permanent magnets 1-4 with the same magnetizing direction are stuck and fixed on each tooth surface, and the permanent magnets 1-4 are radially magnetized; the magnetizing directions of the permanent magnets 1-4 on the adjacent teeth are the same. Each tooth of the stator core 1-1 without the permanent magnet 1-4 is wound with an excitation coil, the winding directions of adjacent excitation coils are opposite, and all the excitation coils are connected in series to form an excitation winding.

The present preferred embodiment is described with reference to fig. 8, and a preferred manner of example 7 is that the permanent magnets 1 to 4 are tile-shaped or flat-plate-shaped.

Example 8:

referring to fig. 9, a hybrid excitation multiphase reluctance motor according to the embodiment 8 is described, which includes a stator 1 and a rotor 2, both of which are coaxial and have an air gap, the rotor 2 being located in the stator 1;

The magnetizing directions of j permanent magnets 1-4 adhered on each tooth are the same, and the magnetizing directions of the permanent magnets 1-4 on adjacent teeth are opposite;

each tooth which is not wound with the armature coil 1-2 is wound with one exciting coil 1-3, the winding directions of the adjacent exciting coils 1-3 are opposite, and all the exciting coils 1-3 are connected in series to form an exciting winding.

In this embodiment 8, all the tooth tops are provided with permanent magnets 1-4, each odd-numbered or even-numbered tooth is wound with an armature coil, each tooth which is not wound with an armature coil is wound with an exciting coil, the magnetic field can be adjusted by changing the exciting current, and the range of the magnetic field is determined by the exciting current density, wherein the part between the adjacent permanent magnets on each tooth is a magnetic bridge and the structure of the magnetic bridge is adopted, so that the efficiency of electric excitation is high, and the current density required by the structure is smaller under the condition of the same magnetic adjusting range.

In fig. 9, 12 teeth are formed on the stator core 1-1, m has a value of 3, and k has a value of 2; an armature coil is wound on each odd or even number of teeth of the stator core 1-1, and all the armature coils are connected into three-phase symmetrical armature windings. The permanent magnets 1-4 are stuck and fixed in shallow grooves on the tooth surface of each stator core, and 2 permanent magnets 1-4 with the same magnetizing direction are stuck and fixed on the tooth surface; the permanent magnets 1-4 are magnetized in the radial direction, and the magnetizing directions of the permanent magnets 1-4 on adjacent teeth are opposite. The teeth of the stator core, which are not wound with the armature coils, are wound with an exciting coil, the winding directions of the exciting coils on adjacent teeth are opposite, and the exciting coils on all the teeth are connected in series to form an exciting winding.

The preferred embodiment is described with reference to fig. 9, and the preferred form of example 8 is that the permanent magnets 1-4 are tile-shaped or flat-plate-shaped.

Example 9:

referring to fig. 10, a hybrid excitation multiphase reluctance motor according to the present embodiment 9 is described, and includes a stator 1 and a rotor 2, which are coaxial and have an air gap, and the rotor 2 is located in the stator 1;

the stator core 1-1 is of a cylindrical structure, slots are formed in the air gap side of the stator core along the axial direction, the formed teeth and slots are alternately arranged in turn along the circumferential direction, and the air gap side of the stator core 1-1 is formed into 2km teeth, wherein k is a positive integer;

each tooth of the stator core 1-1 is wound with an armature coil 1-2, and all the armature coils 1-2 are connected into m-phase symmetrical armature windings;

the magnetizing directions of the j permanent magnets 1-4 adhered on each tooth are the same, and the magnetizing directions of the permanent magnets 1-4 on the adjacent teeth are opposite.

All tooth tops of the embodiment 9 are provided with permanent magnets 1-4, each tooth of the stator core 1-1 is wound with an armature coil, and all armature coils are connected into m-phase symmetrical armature windings; each tooth of the stator core 1-1 is also wound with an excitation coil, the winding directions of the excitation coils on adjacent teeth are opposite, and the excitation coils on all the teeth are connected in series to form an excitation winding;

the magnetic field can be adjusted by changing the exciting current, and the range of the magnetic field is determined by the exciting current density, wherein the part between the adjacent permanent magnets on each tooth is a magnetic bridge, and the structure of the magnetic bridge is adopted, so that the electric excitation efficiency is high, and the current density required by the structure is smaller under the condition of the same magnetic adjusting range.

In fig. 10, 12 teeth are formed on the stator core 1-1, m has a value of 3, and k has a value of 2; one armature coil is wound on each tooth of the stator core 1-1 in the circumferential direction, and all the armature coils are connected into three-phase symmetrical armature windings. The permanent magnets 1-4 are stuck and fixed in shallow grooves on the tooth surface of each stator core, and 2 permanent magnets 1-4 with the same magnetizing direction are stuck and fixed on the tooth surface; the permanent magnets 1-4 magnetize the permanent magnets 1-4 on the adjacent teeth in opposite magnetizing directions. Each tooth of the stator core 1-1 is also wound with an exciting coil, the winding directions of the exciting coils on adjacent teeth are opposite, and the exciting coils on all the teeth are connected in series to form an exciting winding.

The present preferred embodiment is described with reference to fig. 10, and the preferred form of example 9 is that the permanent magnets 1-4 are tile-shaped or flat-plate-shaped.

Example 10:

referring to fig. 10, a power generation system realized by the hybrid-excitation multiphase reluctance motor according to one of embodiments 1 to 9, which further includes a power converter and a dc excitation power supply, will be described in embodiment 9;

the rotor 2 of the reluctance motor is driven to rotate by the inertial flywheel of the prime motor;

the direct current excitation power supply is used for supplying power to the excitation winding of the reluctance motor, so that an air gap magnetic field between the stator 1 and the rotor 2 of the reluctance motor is regulated, when the rotor 2 of the reluctance motor rotates, magnetic force lines of the air gap magnetic field and magnetic flux of an armature winding of the reluctance motor are changed, counter electromotive force is generated on the armature winding 1-2, the counter electromotive force generated by the armature winding 1-2 is subjected to power conversion through the power converter, and electric energy is supplied to the pulse load after the conversion.

In this embodiment 10, the exciting winding can adjust the air-gap field generated by the permanent magnet at the air gap between the stator 1 and the rotor 2, and according to the principle that the magnetic path runs the minimum path of magnetic resistance, the magnetic path structure of the reluctance motor changes when the inertial flywheel drives the rotor to rotate, the magnetic resistance changes, and the magnetic flux intersecting the armature winding changes, so that back electromotive force is generated on the armature winding.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.

Claims

1. The mixed excitation multiphase reluctance motor comprises a stator (1) and a rotor (2), wherein the stator (1) and the rotor (2) are coaxial and have an air gap, and the rotor (2) is positioned in the stator (1);

the rotor (2) is composed of a rotor core, slots are formed on the air gap side of the rotor core along the axial direction, and the formed teeth and slots are alternately arranged along the circumferential direction in sequence;

the stator (1) is composed of a stator core (1-1), m-phase symmetrical armature windings (1-2), exciting windings and permanent magnets (1-4); wherein m is the phase number of the motor;

the stator iron core (1-1) is of a cylindrical structure, grooves are formed on the air gap side of the stator iron core along the axial direction, and the formed teeth and grooves are alternately arranged in turn along the circumferential direction;

The air gap side of the stator core (1-1) is formed into 2Pmk teeth, each adjacent mk teeth is wound with one exciting coil (1-3), the winding directions of the two adjacent exciting coils (1-3) are opposite, all the exciting coils (1-3) are connected in series to form an exciting winding, wherein the number of the exciting coils (1-3) is 2P, P is the pole pair number of a motor stator magnetic field, and k is a positive integer;

the armature windings (1-2) with m phases being symmetrical are embedded in grooves formed on the air gap side of the stator core (1-1);

j shallow grooves are formed in the air gap surface of each tooth along the axial direction, a permanent magnet (1-4) is fixed in each shallow groove, the permanent magnets (1-4) are magnetized radially or in parallel, and j is a positive integer;

the magnetizing directions of j permanent magnets (1-4) adhered on each tooth are the same;

the magnetizing directions of the permanent magnets (1-4) on mk teeth wound by each exciting coil (1-3) are the same, and the magnetizing directions of the permanent magnets (1-4) on the teeth wound by the adjacent two exciting coils (1-3) are opposite.

2. The mixed excitation multiphase reluctance motor comprises a stator (1) and a rotor (2), wherein the stator (1) and the rotor (2) are coaxial and have an air gap, and the rotor (2) is positioned in the stator (1);

The stator (1) is composed of a stator core (1-1), m-phase symmetrical armature windings, exciting windings and permanent magnets (1-4); wherein m is the phase number of the motor, and m is more than or equal to 3;

the stator core (1-1) is of a cylindrical structure, slots are formed on the air gap side of the stator core along the axial direction, the formed teeth and slots are alternately arranged in turn along the circumferential direction, and 2mk teeth are formed on the air gap side of the stator core (1-1) in a conformal manner, wherein k is a positive integer;

of 2mk teeth formed on the stator core (1-1), two teeth adjacent to each other in turn are divided into one group along the circumferential direction, so that mk groups of teeth are formed together, one armature coil (1-2) is wound on each group of teeth, and all the armature coils (1-2) are connected into m-phase symmetrical armature windings;

each tooth of the stator core (1-1) is also wound with an excitation coil (1-3), the winding directions of the excitation coils (1-3) on adjacent teeth are opposite, and the excitation coils (1-3) on all the teeth are connected in series to form an excitation winding;

j shallow grooves are formed in the axial direction of each tooth air gap surface of the stator core (1-1), a permanent magnet (1-4) is fixedly adhered in each shallow groove, the permanent magnets (1-4) are magnetized radially or in parallel, and j is a positive integer;

the magnetizing directions of the permanent magnets (1-4) on the two teeth surrounded by the same armature coil (1-2) are opposite,

The magnetizing directions of the permanent magnets (1-4) on adjacent teeth surrounded by the adjacent armature coils (1-2) are the same.

3. The mixed excitation multiphase reluctance motor comprises a stator (1) and a rotor (2), wherein the stator (1) and the rotor (2) are coaxial and have an air gap, and the rotor (2) is positioned in the stator (1);

the stator (1) is composed of a stator core (1-1), m-phase symmetrical armature windings, exciting windings and permanent magnets (1-4); wherein m is the phase number of the motor, and m is more than or equal to 3; the method comprises the steps of carrying out a first treatment on the surface of the

with four adjacent teeth as a group, 2mk teeth are divided into mk/2 groups, each of which: the first two teeth are wound with an armature coil (1-2) together, all the armature coils (1-2) are connected into m-phase symmetrical armature windings, the second two teeth are wound with an excitation coil (1-3) respectively, the winding directions of the two excitation coils (1-3) are opposite, and all the excitation coils (1-3) are connected in series to form an excitation winding;

The air gap surfaces of two teeth surrounded by the same armature coil (1-2) are provided with j shallow grooves along the axial direction, a permanent magnet (1-4) is stuck in each shallow groove, the magnetizing directions of the j permanent magnets (1-4) stuck on the teeth wound with the armature coil (1-2) are the same, the permanent magnets are radial magnetizing or parallel magnetizing, and j is a positive integer;

the magnetizing directions of the permanent magnets (1-4) on the two teeth surrounded by the same armature coil (1-2) are opposite;

4. The mixed excitation multiphase reluctance motor comprises a stator (1) and a rotor (2), wherein the stator (1) and the rotor (2) are coaxial and have an air gap, and the rotor (2) is positioned in the stator (1);

the stator iron core (1-1) is of a cylindrical structure, grooves are formed on the air gap side of the stator iron core along the axial direction, and the formed teeth and grooves are alternately arranged in turn along the circumferential direction; the air gap side of the stator core (1-1) is formed into 3km teeth, wherein k is a positive integer;

Among 3km teeth formed on the stator core (1-1), each adjacent three teeth are divided into a group along the circumferential direction in turn to form mk groups of teeth altogether, wherein the first two teeth in each group of teeth are wound with an armature coil (1-2), and all the armature coils (1-2) are connected into m-phase symmetrical armature windings;

the magnetizing directions of the permanent magnets (1-4) on adjacent teeth surrounded by the adjacent armature coils (1-2) are the same;

each tooth without the permanent magnet (1-4) is wound with one exciting coil (1-3), the winding directions of the adjacent exciting coils (1-3) are opposite, and all the exciting coils (1-3) are connected in series to form an exciting winding.

5. The mixed excitation multiphase reluctance motor comprises a stator (1) and a rotor (2), wherein the stator (1) and the rotor (2) are coaxial and have an air gap, and the rotor (2) is positioned in the stator (1);

the stator core (1-1) is of a cylindrical structure, the air gap side of the stator core is axially grooved, the formed teeth and grooves are sequentially and alternately arranged along the circumferential direction, the air gap side of the stator core (1-1) is conformally formed with 2km teeth, each odd or even tooth is wound with an armature coil (1-2) along the circumferential direction, and all the armature coils (1-2) are connected into m-phase symmetrical armature windings; wherein k is a positive integer;

j shallow grooves are formed in the axial direction of the air gap surface of each tooth wound with the armature coil (1-2), a permanent magnet (1-4) is stuck in each shallow groove, the permanent magnets (1-4) are magnetized radially or in parallel, and j is a positive integer;

the magnetizing directions of j permanent magnets (1-4) adhered to the teeth around which the armature coils (1-2) are wound are the same, and the magnetizing directions of the permanent magnets (1-4) on the teeth around which the armature coils (1-2) are adjacent are the same;

6. The mixed excitation multiphase reluctance motor comprises a stator (1) and a rotor (2), wherein the stator (1) and the rotor (2) are coaxial and have an air gap, and the rotor (2) is positioned in the stator (1);

the magnetizing directions of j permanent magnets (1-4) adhered on each tooth are the same, and the magnetizing directions of the permanent magnets (1-4) on adjacent teeth are opposite;

each tooth which is not wound with the armature coil (1-2) is wound with one exciting coil (1-3), the winding directions of the adjacent exciting coils (1-3) are opposite, and all the exciting coils (1-3) are connected in series to form an exciting winding.

7. The mixed excitation multiphase reluctance motor comprises a stator (1) and a rotor (2), wherein the stator (1) and the rotor (2) are coaxial and have an air gap, and the rotor (2) is positioned in the stator (1);

the stator core (1-1) is of a cylindrical structure, grooves are formed in the air gap side of the stator core along the axial direction, the formed teeth and grooves are alternately arranged in sequence along the circumferential direction, and the air gap side of the stator core (1-1) is conformal with 2km teeth, wherein k is a positive integer;

an armature coil (1-2) is wound on each tooth of the stator core (1-1), and all the armature coils (1-2) are connected into m-phase symmetrical armature windings;

The magnetizing directions of the j permanent magnets (1-4) adhered on each tooth are the same, and the magnetizing directions of the permanent magnets (1-4) on the adjacent teeth are opposite.

8. Hybrid-excitation multiphase reluctance machine according to one of claims 1 to 7, characterized in that the permanent magnets (1-4) are tile-shaped or plate-shaped.

9. Hybrid-excitation multiphase reluctance machine according to one of claims 4, 5, 6, characterized in that a magnetic barrier is embedded in each slot adjacent to the tooth to which the permanent magnet (1-4) is affixed.

10. A power generation system implemented using the hybrid excitation multiphase reluctance machine according to any one of claims 1 to 7, characterized in that the system further comprises a power converter and a dc excitation power source;

driving a rotor (2) of the reluctance motor to rotate through a prime motor inertia flywheel;

the direct current excitation power supply is used for supplying power to an excitation winding of the reluctance motor, so that an air gap magnetic field between a stator (1) and a rotor (2) of the reluctance motor is regulated, when the rotor (2) of the reluctance motor rotates, magnetic force lines of the air gap magnetic field and magnetic flux of an armature winding of the reluctance motor are changed, counter electromotive force is generated on the armature winding (1-2), the counter electromotive force generated by the armature winding (1-2) is subjected to power conversion through the power converter, and electric energy is supplied to a pulse load after the conversion.