阅读说明：本技术 模块化双三相永磁同步电机装置 (Modularized double three-phase permanent magnet synchronous motor device ) 是由 曾凡铨 崔业兵 刘通 冯伟 薛靓 张登明 于 2019-10-24 设计创作，主要内容包括：本发明提供了一种模块化双三相永磁同步电机装置,包括：电机壳体、不导磁转轴4、定子部件1和转子部件2；所述定子部件1截面与转子部件2的截面呈同心圆形状；所述定子部件1与转子部件2设置于电机壳体所限制的空间内；所述转子部件2包括：转子铁芯构件3和永磁体构件；所述转子部件2与定子部件1之间存在预定长度的径向气隙结构；所述永磁体构件黏贴于转子部件2的外表面；所述永磁体构件沿铁芯表面的圆周均匀分布；定子部件1包括：E型铁芯单元；所述E型铁芯单元包括：电枢齿构件601、容错齿构件602；所述电枢齿构件601与容错齿构件602交错排列；不导磁转轴4与转子部件2相连。本发明能够提高电机系统的可靠性。(The invention provides a modularized double three-phase permanent magnet synchronous motor device, which comprises: the motor comprises a motor shell, a non-magnetic rotating shaft 4, a stator part 1 and a rotor part 2; the section of the stator part 1 and the section of the rotor part 2 are in concentric circle shape; the stator part 1 and the rotor part 2 are arranged in a space limited by a motor shell; the rotor unit 2 includes: rotor core member 3 and permanent magnet member; a radial air gap structure with a preset length exists between the rotor part 2 and the stator part 1; the permanent magnet component is adhered to the outer surface of the rotor component 2; the permanent magnet components are uniformly distributed along the circumference of the surface of the iron core; the stator component 1 comprises: an E-shaped core unit; the E-shaped iron core unit comprises: an armature tooth member 601, a fault tolerant tooth member 602; the armature tooth members 601 and the fault-tolerant tooth members 602 are arranged in a staggered mode; the non-magnetic rotating shaft 4 is connected with the rotor component 2. The invention can improve the reliability of the motor system.)

1. A modular double three-phase permanent magnet synchronous motor device is characterized by comprising: the motor comprises a motor shell, a non-magnetic rotating shaft (4), a stator component (1) and a rotor component (2);

the section of the stator part (1) and the section of the rotor part (2) are in concentric circle shape;

the stator part (1) and the rotor part (2) are arranged in a space limited by the motor shell;

the rotor component (2) comprises: a rotor core member (3) and a permanent magnet member;

a radial air gap structure with a preset length exists between the rotor part (2) and the stator part (1);

the permanent magnet component is adhered to the outer surface of the rotor component (2);

the permanent magnet components are uniformly distributed along the circumference of the surface of the iron core;

the stator component (1) comprises: an E-shaped core unit;

the E-shaped iron core unit comprises: an armature tooth member (601), a fault tolerant tooth member (602);

the armature tooth members (601) and the fault-tolerant tooth members (602) are arranged in a staggered mode;

the non-magnetic rotating shaft (4) is connected with the rotor component (2).

2. The modular dual three-phase permanent magnet synchronous motor apparatus of claim 1, wherein the radial air gap structure is a length-adjustable radial air gap structure.

3. The modular dual three-phase permanent magnet synchronous motor device according to claim 1, wherein the number of the E-type core units is 6;

the 6E-shaped iron core units are spliced to form a similar ring shape.

4. The modular dual three-phase permanent magnet synchronous motor device according to claim 3, wherein the E-type core unit comprises: 1 armature tooth component (601), 2 fault-tolerant tooth components (602).

5. A modular twin three-phase permanent magnet synchronous machine arrangement according to claim 1, characterised in that the armature tooth member (601) is wound with a phase concentrated winding (5);

the number of turns of the winding (5) is a predetermined value;

the winding (5) is arranged in the center of the armature tooth member (601).

6. A modular twin three phase PMSM device according to claim 4, characterised in that a predetermined air gap spacing is provided between the fault tolerant teeth members (602) of each E core unit and the fault tolerant teeth members (602) of two adjacent E core units.

7. The modular dual three-phase permanent magnet synchronous motor device of claim 1, wherein the number of permanent magnet members is 12;

the 12 permanent magnet components are uniformly distributed along the circumference of the surface of the iron core;

the 12 permanent magnet components are magnetized along the radial direction, and the magnetizing directions of the permanent magnet components are alternately opposite;

the surfaces of the 12 permanent magnet members were injected with third harmonic components.

8. A modular twin three-phase PMSM device according to claim 5, characterised in that the windings (5) constitute two sets of three-phase windings, respectively, with a 30 ° phase difference between the two sets.

Technical Field

The invention relates to the field of synchronous motors, in particular to a modularized double three-phase permanent magnet synchronous motor device, and particularly relates to a novel modularized double three-phase permanent magnet synchronous motor device.

Background

Multi-electric/all-electric aircraft use electric propulsion systems instead of internal combustion engine power, thereby achieving many advantages and unique qualities. The most outstanding advantages are energy saving, environmental protection, high efficiency, low energy consumption, near zero emission, low noise and vibration level, good riding comfort and being a real environment-friendly airplane. In addition, the device has the characteristics of safety, reliability (no explosion and fuel leakage), simple structure, convenience in operation and use, good maintainability, low cost, good economy and the like. There are also many advantages in design: the overall layout is flexible, and the optimal layout, the unconventional innovative layout and the like can be adopted. However, the requirements of the multi-electric/all-electric aircraft on the motor driving system are severe, and the requirements are mainly embodied in the following aspects: 1) high power density. This has been one of the main development directions of electric motors, especially in aircraft motors. Aircraft consume large amounts of electrical energy in flight and the demand for motor power density is increasing day by day. The power density of the traditional motor is 0.5kW/kg, while the requirement of the airplane motor on the power density at least reaches 1.5kW/kg, and the long-term target is more to reach 7 kW/kg; although the reliability and the replacement period of the motor of the airplane are strictly regulated, the motor still has the possibility of early failure in extremely severe environments, such as high salinity, high humidity areas and the like, and under the condition, if the motor can perform short-time fault-tolerant operation in a certain mode, more time can be provided for the forced landing or escape of the airplane, the survival possibility of personnel is improved, and the life safety is better ensured.

EHA and EMA based on double three-phase permanent magnet motors have been widely used in multi-electric/all-electric aircraft. And the technology is blocked in China, so that EHA and EMA used for airplanes in China are mostly imported, and the localization of novel EHA and EMA is greatly restricted. However, the redundancy design of the new servomechanism is also in the launch phase in the foreign aerospace field. Therefore, the manned carrier rocket servo mechanism technology in future in China can realize moderate leap-type development aiming at the requirements on the basis of pursuing foreign advanced technology. The design of dual-redundancy permanent magnet motors for EHA and EMA applications is already at hand. The dual-redundancy permanent magnet synchronous motor is a product formed by combining a redundancy technology and a permanent magnet synchronous motor. The permanent magnet synchronous motor has the advantages of wide speed regulation range, fast dynamic response, high power density and the like, and can improve the safety and reliability of a motor system.

Patent document CN109980799A discloses a synchronous machine comprising a stator with stator coils and a rotor with rotor poles and permanent magnets, wherein the end side of each rotor pole facing the stator has undulations in the radial direction which are superimposed on the basic profile. There is still room for improvement in improving the safety and reliability of the motor system.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a modular double three-phase permanent magnet synchronous motor device.

According to the invention, the modularized double three-phase permanent magnet synchronous motor device comprises: the motor comprises a motor shell, a non-magnetic rotating shaft 4, a stator part 1 and a rotor part 2; the section of the stator part 1 and the section of the rotor part 2 are in concentric circle shape; the stator part 1 and the rotor part 2 are arranged in a space limited by a motor shell; the rotor unit 2 includes: rotor core member 3 and permanent magnet member; a radial air gap structure with a preset length exists between the rotor part 2 and the stator part 1; the permanent magnet component is adhered to the outer surface of the rotor component 2; the permanent magnet components are uniformly distributed along the circumference of the surface of the iron core; the stator component 1 comprises: an E-shaped core unit; the E-shaped iron core unit comprises: an armature tooth member 601, a fault tolerant tooth member 602; the armature tooth members 601 and the fault-tolerant tooth members 602 are arranged in a staggered mode; the non-magnetic rotating shaft 4 is connected with the rotor component 2.

Preferably, the radial air gap structure is a length-adjustable radial air gap structure.

Preferably, the number of the E-type core units is 6; the 6E-shaped iron core units are spliced to form a similar ring shape.

Preferably, the E-core unit includes: 1 armature tooth member 601, 2 fault tolerant tooth members 602;

preferably, the armature tooth member 601 is wound with a concentrated winding 5; the number of turns of the winding 5 is a predetermined value; the winding 5 is disposed at the center position of the armature tooth member 601.

Preferably, a preset air gap interval is arranged between the fault-tolerant tooth member 602 of each E-shaped iron core unit and the fault-tolerant tooth members 602 of two adjacent E-shaped iron core units; ensures complete isolation between motor phases, thereby improving the fault-tolerant operation capability of the motor,

preferably, the number of the permanent magnet members is 12; the 12 permanent magnet components are uniformly distributed along the circumference of the surface of the iron core; the 12 permanent magnet components are magnetized along the radial direction, and the magnetizing directions of the permanent magnet components are alternately opposite; the surfaces of the 12 permanent magnet members were injected with third harmonic components.

Preferably, the windings 5 respectively form two sets of three-phase windings, and the phase difference between the two sets of three-phase windings is 30 °.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention avoids the limitations of the existing motors with unequal tooth structures and modular motors, and improves the torque density of the motor by increasing the fundamental wave winding coefficient of the motor;

2. the invention avoids the serious influence on the cogging torque of the motor caused by the introduction of the air gap interval; the invention avoids the influence of overlarge magnetic flux gap on the periodicity of the cogging torque and improves the safety and the reliability of a motor system.

3. The invention applies the redundancy technology to the motor windings, namely two sets of armature windings are adopted in one set of motor system. In the aspect of motor control, a fault-tolerant control mode is adopted for two sets of windings, and each set of windings is respectively provided with a driver. The two sets of windings can work simultaneously, and when one set of windings fails, the other set of windings can still work normally. Namely, the reliability of the motor system is improved by adopting a winding redundancy technology.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural diagram of a cross-sectional model of the present invention.

FIG. 2 is a schematic diagram of a three-phase winding in a cross-sectional model of the motor of the present invention;

FIG. 3 is a comparison of no-load flux linkage between the motor of the present invention and a prior art motor;

FIG. 4 is a comparison of the air gap flux density of the motor of the present invention with that of a prior art motor;

FIG. 5 is a graph comparing the output torque of the motor of the present invention with that of the conventional motor

In the figure:

stator part 1 winding 5

A rotor part 2; set of three-phase windings 501

Rotor core member 3 armature tooth member 601

Non-magnetic-conductive rotating shaft 4 fault-tolerant tooth component 602

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

According to the invention, the modularized double three-phase permanent magnet synchronous motor device comprises: the motor comprises a motor shell, a non-magnetic rotating shaft 4, a stator part 1 and a rotor part 2; the section of the stator part 1 and the section of the rotor part 2 are in concentric circle shape; the stator part 1 and the rotor part 2 are arranged in a space limited by a motor shell; the rotor unit 2 includes: rotor core member 3 and permanent magnet member; a radial air gap structure with a preset length exists between the rotor part 2 and the stator part 1; the permanent magnet component is adhered to the outer surface of the rotor component 2; the permanent magnet components are uniformly distributed along the circumference of the surface of the iron core; the stator component 1 comprises: an E-shaped core unit; the E-shaped iron core unit comprises: an armature tooth member 601, a fault tolerant tooth member 602; the armature tooth members 601 and the fault-tolerant tooth members 602 are arranged in a staggered mode; the non-magnetic rotating shaft 4 is connected with the rotor component 2.

Preferably, the radial air gap structure is a length-adjustable radial air gap structure.

Preferably, the number of the E-type core units is 6; the 6E-shaped iron core units are spliced to form a similar ring shape.

Preferably, the E-core unit includes: 1 armature tooth member 601, 2 fault tolerant tooth members 602;

preferably, the armature tooth member 601 is wound with a concentrated winding 5; the number of turns of the winding 5 is a predetermined value; the winding 5 is disposed at the center position of the armature tooth member 601.

Preferably, a preset air gap interval is arranged between the fault-tolerant tooth member 602 of each E-shaped iron core unit and the fault-tolerant tooth members 602 of two adjacent E-shaped iron core units; ensures complete isolation between motor phases, thereby improving the fault-tolerant operation capability of the motor,

preferably, the number of the permanent magnet members is 12; the 12 permanent magnet components are uniformly distributed along the circumference of the surface of the iron core; the 12 permanent magnet components are magnetized along the radial direction, and the magnetizing directions of the permanent magnet components are alternately opposite; the surfaces of the 12 permanent magnet members were injected with third harmonic components.

Preferably, the windings 5 respectively form two sets of three-phase windings, and the phase difference between the two sets of three-phase windings is 30 °.

Specifically, in one embodiment, the stator of the motor is composed of 6E-shaped iron cores, adjacent E-shaped iron cores are separated by air gaps, non-separated stator teeth are armature teeth, the windings adopt single-layer concentrated windings, each armature tooth is provided with a phase winding, the winding 501 forms one set of three-phase windings, the other windings form the other set of three-phase windings, and the phase difference between the two sets of windings is 30 degrees. The widths of the armature teeth, the fault-tolerant teeth and the air gap intervals are adjusted, so that the slot pitch and the pole pitch of the motor are equal, the winding coefficient of the motor is improved, and the torque density of the motor is improved.

Fig. 3 is a comparison diagram of no-load flux linkage between the motor of the present invention and the existing motor, and the two motors have the same rotor and winding parameters except for the inconsistency of the stator model parameters, so that it can be seen that the flux linkage of the motor of the present invention is 16% higher than that of the existing motor. Fig. 4 is a comparison of the air gap flux densities of the motor of the present invention and a prior art motor. Fig. 5 is a graph comparing output torques of the motor of the present invention and the conventional motor, and it can be seen that the output torque of the motor of the present invention is 0.42Nm more than that of the conventional motor and the torque ripple is 19.2% less than that of the conventional motor.

While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.

The invention is a novel modularized double three-phase permanent magnet synchronous motor, but can also be used as a general high-reliability power conversion device, and is suitable for the application fields of other servo motors. The user can flexibly and conveniently realize the functions of the system by modifying hardware parameters and the like according to the special application field of the system.

Because the fractional slot concentrated winding is adopted, the distribution coefficient of the motor is 1, and therefore, the factors determining the winding coefficient of the motor become the pole pitch and the slot pitch. When the motor rotor is fixed, the pole pitch of the motor rotor does not change, and the slot pitch and the pole pitch need to be consistent when the maximum fundamental wave winding coefficient is obtained. To 12 groove 10 utmost points motors of tooth width such as tradition, the groove square is less than the polar distance, can't make fundamental wave winding coefficient be 1, consequently adopt two three-phase PMSM of novel modularization, through the width of adjustment armature tooth, make the groove square of an E type iron core equal to the polar distance, thereby ensure that the fundamental wave winding coefficient is 1, nevertheless this moment because armature tooth width is great, under the prerequisite of guaranteeing that the groove area is unchangeable, the tooth width of supplementary tooth is too narrow, supplementary tooth supersaturation, thereby greatly reduced the output torque of motor. Therefore, the sizes of the armature teeth and the auxiliary teeth are adjusted, and the width of the stator teeth with the largest fundamental wave coefficient is selected when the maximum no-load flux density of the motor stator is ensured to be lower than 1.5T.

The invention avoids the limitations of the existing motors with unequal tooth structures and modular motors, and improves the torque density of the motor by increasing the fundamental wave winding coefficient of the motor; the invention avoids the serious influence on the cogging torque of the motor caused by the introduction of the air gap interval; the invention avoids the influence of overlarge magnetic flux gap on the periodicity of the cogging torque and improves the safety and the reliability of a motor system.

Those skilled in the art will appreciate that, in addition to implementing the system and its various devices, modules, units provided by the present invention as pure computer readable program code, the system and its various devices, modules, units provided by the present invention can be fully implemented by logically programming method steps in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system and various devices, modules and units thereof provided by the invention can be regarded as a hardware component, and the devices, modules and units included in the system for realizing various functions can also be regarded as structures in the hardware component; means, modules, units for performing the various functions may also be regarded as structures within both software modules and hardware components for performing the method.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.