CN213484729U - Novel high-speed asymmetric integrated rotor type permanent magnet synchronous reluctance motor - Google Patents
Novel high-speed asymmetric integrated rotor type permanent magnet synchronous reluctance motor Download PDFInfo
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- CN213484729U CN213484729U CN202022984502.6U CN202022984502U CN213484729U CN 213484729 U CN213484729 U CN 213484729U CN 202022984502 U CN202022984502 U CN 202022984502U CN 213484729 U CN213484729 U CN 213484729U
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Abstract
The utility model provides a novel high-speed asymmetric integrated rotor formula permanent magnetism synchronous reluctance motor, include: the rotor is integrated by a surface-mounted permanent magnet synchronous motor rotor and two synchronous reluctance motor rotors, and the surface-mounted permanent magnet synchronous motor rotor is clamped between the two synchronous reluctance motor rotors; the surface-mounted permanent magnet synchronous motor rotor and the synchronous reluctance motor rotor are configured with a mounting angle, so that the maximum values of the permanent magnet torque and the reluctance torque of the motor can be superposed at the same current phase angle. The integrated rotor is symmetrically arranged in the axial direction to eliminate axial unbalanced electromagnetic force, and an asymmetric design is adopted in the circumferential rotation direction, namely, the surface-mounted permanent magnet synchronous motor rotor and the synchronous reluctance motor rotor are arranged through a special installation angle, so that the maximum values of the permanent magnet torque and the reluctance torque of the motor can be superposed at the same current phase angle, and two torque components of the motor are fully utilized.
Description
Technical Field
The utility model belongs to the permanent magnetism synchronous reluctance motor field especially relates to a novel high-speed asymmetric integrated rotor formula permanent magnetism synchronous reluctance motor.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In the field of manufacturing of high-end equipment at present, a motor and a driving system are used as main power components, the development level of the motor and the driving system is closely related to the development level of the motor, and the requirements of miniaturization and light weight of the motor are increasingly urgent. Compared with the traditional constant-speed motor, the high-speed motor can be directly connected with a load, a speed change device is omitted, the size and the weight of the motor and the whole system are greatly reduced, the requirement for light weight is met, the reliability is improved, the gear noise is eliminated, and the transmission efficiency of the system is improved. Meanwhile, the high-speed motor has the remarkable advantages of high rotating speed, high power density, high efficiency and the like, so that the high-speed motor has obvious advantages in the field of high-end equipment manufacturing and application. The traditional high-speed motor has certain advantages and disadvantages like high-speed induction motor, high-speed switched reluctance motor, high-speed synchronous reluctance motor, high-speed permanent magnet motor and the like:
the rotor of the high-speed induction motor has a simpler structure and can bear larger centrifugal force, but the loss of the rotor is large, and the power factor and the efficiency are very low. The rotor of the high-speed switched reluctance motor has high mechanical strength, but has large torque pulsation, large mechanical vibration, high noise and large rotor wind abrasion, and needs accurate rotor position signals to control the torque and the current, so that the control is complex. The high-speed synchronous reluctance motor has large torque pulsation, low efficiency and power factor, is between a permanent magnet motor and a switched reluctance motor, and does not have a self-starting function. The high-speed permanent magnet motor has high power density, high power factor and high efficiency, but the mechanical strength of the rotor structure is low, and for a surface-mounted permanent magnet motor, in order to enable a permanent magnet to bear tensile stress generated by high-speed rotation, a protective sleeve is required to protect the permanent magnet, so that certain heat dissipation difficulty is caused. For the embedded permanent magnet motor, the permanent magnets are embedded into the silicon steel sheets of the rotor, and the magnetic leakage of the permanent magnets is serious, so that the design is more complicated. In addition, although the conventional interior permanent magnet motor can generate high permanent magnet torque and reluctance torque, two torque components cannot be fully utilized, fig. 1 shows a torque superposition relationship of the conventional interior permanent magnet motor, the permanent magnet torque and the reluctance torque reach maximum values at different current phase angles, and the electromagnetic torque is vector superposition of the permanent magnet torque and the reluctance torque, which shows that the permanent magnet torque and the reluctance torque which can be generated by the conventional interior permanent magnet motor are only partially utilized. Therefore, the structure and performance of the high-speed motor currently used in the field of high-end equipment manufacturing need to be optimized.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of above-mentioned prior art, this disclosure provides a novel high-speed asymmetric integrated rotor formula permanent magnetism synchronous reluctance motor, make full use of permanent magnetism torque and reluctance torque to performance such as comprehensive promotion motor torque and power density and efficiency.
In order to achieve the above object, one or more embodiments of the present disclosure provide the following technical solutions:
in a first aspect, a novel high-speed asymmetric integrated rotor type permanent magnet synchronous reluctance motor is disclosed, comprising:
the rotor is integrated by a surface-mounted permanent magnet synchronous motor rotor and two synchronous reluctance motor rotors, and the surface-mounted permanent magnet synchronous motor rotor is clamped between the two synchronous reluctance motor rotors;
the surface-mounted permanent magnet synchronous motor rotor and the synchronous reluctance motor rotor are configured with a mounting angle, so that the maximum values of the permanent magnet torque and the reluctance torque of the motor can be superposed at the same current phase angle;
the stator is composed of a stator core and a stator winding, a plurality of stator slots are uniformly distributed in the stator, the stator winding is wound on the stator slots, and the stator core and the rotor core are formed by axially laminating silicon steel sheets.
According to the further technical scheme, the installation angle is an included angle between a magnetic pole center line of the surface-mounted permanent magnet synchronous motor rotor and center lines of two salient poles of the synchronous reluctance motor rotor.
According to the technical scheme, the rotor is of an axial three-layer structure and comprises a rotating shaft, a rotor core fixed on the rotating shaft is fixed on the rotating shaft, the permanent magnet is tightly attached to the outer wall of the rotor core of the surface-mounted permanent magnet synchronous motor rotor, and each magnetic pole is arranged on the surface-mounted permanent magnet synchronous motor rotor at equal intervals.
Preferably, the number of the magnetic poles of the surface-mounted permanent magnet synchronous motor rotor is set according to specific requirements, and the magnetic poles are identical in structure.
According to a further technical scheme, the magnetic poles of the surface-mounted permanent magnet synchronous motor rotor are formed by arranging five permanent magnets, the middle of the magnetic poles is neodymium iron boron I, the two layers of the magnetic poles are neodymium iron boron II, the two layers of the magnetic poles are ferrites, the permanent magnets of multiple specifications enable air gap flux density waveforms to tend to be sinusoidal, and air gap flux density harmonic content is reduced.
According to the technical scheme, the synchronous reluctance motor rotor is composed of a rotor core and magnetic isolation bridges, each magnetic pole is identical in structure and arranged at equal intervals in the rotating direction, and the magnetic isolation bridges extend along the rotating shaft direction.
According to the technical scheme, each magnetic pole of the synchronous reluctance motor rotor is of a four-layer magnetic isolation bridge structure, each magnetic isolation bridge is arranged layer by layer from the rotating shaft to the edge of the synchronous reluctance motor rotor, the magnetic isolation bridges are gradually reduced from inside to outside from the rotating shaft, the innermost magnetic isolation bridge is the largest and wraps the outer magnetic isolation bridge, and the outermost magnetic isolation bridge is a short strip-shaped magnetic isolation bridge.
Preferably, an auxiliary reinforcing rib is arranged in the middle of each layer of the magnetic isolation bridge.
In a second aspect, a design method of a novel high-speed asymmetric integrated rotor type permanent magnet synchronous reluctance motor is disclosed, which comprises the following steps:
the surface-mounted permanent magnet synchronous motor rotor and the synchronous reluctance motor rotor are provided with a mounting angle, and the mounting angle is an included angle between a magnetic pole central line of the surface-mounted permanent magnet synchronous motor rotor and central lines of two salient poles of the synchronous reluctance motor rotor, so that the maximum values of the permanent magnet torque and the reluctance torque of the motor can be superposed at the same current phase angle.
In a third aspect, a driving system is disclosed, wherein the driving device comprises the asymmetric integrated rotor type permanent magnet synchronous reluctance motor and a controller, the controller is electrically connected with the motor, and the motor is directly connected with a load.
The above one or more technical solutions have the following beneficial effects:
the integrated rotor is symmetrically arranged in the axial direction to eliminate axial unbalanced electromagnetic force, and an asymmetric design is adopted in the circumferential rotation direction, namely, the surface-mounted permanent magnet synchronous motor rotor and the synchronous reluctance motor rotor are arranged through a special installation angle, so that the maximum values of the permanent magnet torque and the reluctance torque of the motor can be superposed at the same current phase angle, and two torque components of the motor are fully utilized.
The surface-mounted permanent magnet synchronous motor rotor consists of an iron core and three permanent magnets, wherein the three permanent magnets are arranged and tightly attached to the outer surface of the iron core according to specifications. In view of the characteristics of high ferrite permeability, high resistivity, low loss and high-temperature demagnetization resistance, the permanent magnet rotor adopts two kinds of neodymium iron boron and one kind of ferrite permanent magnet configuration, each pole is formed by five permanent magnets in an arrangement mode, the middle part is neodymium iron boron I, the two outward layers are neodymium iron boron II, the two outermost layers are ferrites, and the permanent magnets of four magnetic poles are uniformly distributed on the surface of the rotor.
The rotor of the synchronous reluctance motor is composed of an iron core and magnetic isolation bridges, each pole is identical in structure, a four-layer magnetic isolation bridge structure is adopted, an auxiliary reinforcing rib design is adopted in the middle of each layer of magnetic isolation bridge, torque pulsation can be effectively reduced, mechanical strength is improved, and stable, efficient and reliable operation of the motor is guaranteed.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
FIG. 1 is a diagram of a conventional motor torque overlay;
FIG. 2 is a torque overlay relationship diagram for an electric machine in an embodiment of the present disclosure;
FIG. 3 is a schematic view of a stator structure of an electric machine in an embodiment of the present disclosure;
FIG. 4 is a schematic view of an integrated rotor of an electric machine in an embodiment of the present disclosure;
FIG. 5 is a top view of a surface-mounted PMSM rotor according to the embodiments of the present disclosure;
FIG. 6 is a top view of a synchronous reluctance machine rotor according to an embodiment of the present disclosure;
wherein: 1. stator core, 2, stator winding, 3, stator slot, 4, synchronous reluctance motor rotor, 5, surface-mounted permanent magnet synchronous motor rotor, 6, neodymium iron boron I, 7, neodymium iron boron II, 8, ferrite, 9, pivot, 10, rotor core, 11, magnetic isolation bridge, 12, strengthening rib.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
Example one
The embodiment discloses a novel high-speed asymmetric integrated rotor type permanent magnet synchronous reluctance motor which comprises a rotor and a stator.
For more clearly illustrating the present embodiment, the specific structure of the motor is described as follows:
referring to fig. 3, the stator of the present disclosure is composed of a stator core 1 and a stator winding 2, six stator slots 3 are uniformly distributed in the stator, the stator winding 2 is wound on the stator slots 3, and X in the figure is an incoming line direction of the stator winding and is an outgoing line direction of the stator winding. The stator and rotor iron cores are formed by axially laminating silicon steel sheets. The number of stator slots and the distribution form of stator windings can be changed, and the distribution of six slots and concentrated windings is only used for illustration. And the stator structure does not need to be specially designed, and the traditional stator meeting the conditions can be obtained.
Referring to fig. 4, 5 and 6, the present disclosure provides a novel high-speed asymmetric rotor integrated permanent magnet synchronous reluctance motor, in which the rotor is an axial three-layer structure, and includes a rotating shaft 9 and a rotor core 10 fixed to the rotating shaft. The surface-mounted permanent magnet synchronous motor rotor 5 adopts a multi-specification permanent magnet design, permanent magnets are tightly attached to the outer wall of a rotor core 10 of the surface-mounted permanent magnet synchronous motor rotor 5, each magnetic pole is arranged on the surface-mounted permanent magnet synchronous motor rotor at equal intervals, the number of the magnetic poles can be set according to specific requirements, four magnetic poles or more magnetic poles are arranged in the surface-mounted permanent magnet synchronous motor rotor, but the configuration form of each magnetic pole is the same as that of the following magnetic poles, each magnetic pole is the same in structure and is formed by arranging five permanent magnets, the middle part is neodymium iron boron I6, the outer two layers are neodymium iron boron II 7, the outermost two layers are ferrite 8, the air gap flux density waveform tends to be sinusoidal due to the multi-specification permanent magnet design, the air gap flux density harmonic content is effectively reduced, the iron core loss is remarkably reduced in a. The permanent magnet protective sleeve of the surface-mounted permanent magnet synchronous motor rotor is not shown on the schematic diagram. The synchronous reluctance motor rotor 4 is composed of a rotor core 10 and a magnetic isolation bridge 11, and may have a four-pole structure or a plurality of magnetic poles, but it is necessary that the arrangement form of each magnetic pole is the same as the arrangement form of the magnetic poles described below, each magnetic pole has the same structure and is disposed at equal intervals in the rotation direction, and the magnetic isolation bridge 11 extends in the rotation axis direction. Each pole adopts four layers of magnetic isolation bridges 11, each layer of magnetic isolation bridges 11 are arranged layer by layer from the rotating shaft 9 to the edge of the synchronous reluctance motor rotor, the magnetic isolation bridges 11 are gradually reduced from the rotating shaft 9 from inside to outside, the innermost magnetic isolation bridge is the largest and can wrap the outer magnetic isolation bridge, and the outermost layer is a short strip-shaped magnetic isolation bridge. The middle of each layer of magnetic isolation bridge 11 is provided with the auxiliary reinforcing rib 12, so that the torque pulsation can be effectively reduced, the mechanical strength can be enhanced, and the stable, efficient and reliable operation of the motor can be ensured.
Further explanation in the above scheme shows that the remanence of neodymium iron boron I is large, the remanence of 7 neodymium iron boron II is small, and the remanence of the two are different, as shown in FIG. 4. The magnetic isolation bridge has the function of changing the magnetic circuit structure, so that the magnetic resistance of dq cycles is unequal, and the reluctance torque is generated. Each magnetic pole of the surface-mounted permanent magnet synchronous motor rotor is formed by three permanent magnets (namely neodymium iron boron I6, neodymium iron boron II 7 and ferrite 8). The multi-specification permanent magnet design enables the air gap flux density waveform to tend to be sinusoidal, effectively reduces the air gap flux density harmonic content, obviously reduces the iron core loss in a high-frequency and high-speed operating environment, and simultaneously reduces the torque ripple.
The motor rotor is axially integrated by one surface-mounted permanent magnet synchronous motor rotor 5 and two synchronous reluctance motor rotors 4, the surface-mounted permanent magnet synchronous motor rotor 5 is clamped between the two synchronous reluctance motor rotors, the segmented rotors have high flexibility, an axial eddy current circulation path can be blocked, and eddy current loss is effectively reduced under a high-speed working condition. The two rotors are configured by a special mounting angle (delta), as shown in fig. 2, delta is defined as an included angle between a d axis and a q axis, wherein the d axis is defined as a magnetic pole center line of a surface-mounted permanent magnet synchronous motor rotor, and the q axis is defined as a center line of two salient poles of a synchronous reluctance motor rotor.
The technical scheme is that the asymmetric integrated rotor type permanent magnet synchronous reluctance motor is suitable for high-speed application occasions, the high-speed motor is different from a common motor in that the speed of a gearbox is required to be increased and then is connected with a load, but can be directly connected with the load, and mechanical complexity and maintenance cost are reduced. Loading specific objects: the patent also has a plurality of specific application scenes, for example, the fields of high-speed driving equipment such as distributed power generation systems of airplanes and naval vessels, high-grade numerical control machine tool spindles, natural gas conveying high-speed centrifugal compressors, energy storage flywheels and the like.
The power relation is as follows: the motor is connected with a high-speed load, a speed change device is omitted, high-speed direct drive is realized, the size and the weight of the motor and the whole system are greatly reduced, the reliability is improved, the gear noise is eliminated, and the transmission efficiency of the system is improved.
This novel high-speed motor has integrateed multiple performance and has promoted the technique, under the prerequisite that does not increase motor machine manufacturing and the cooling degree of difficulty, promotes the performance such as the torque and the power density, power factor, efficiency and the torque ripple of motor comprehensively, and this novel high-speed motor has following characteristics:
(1) the motor rotor is integrated by a multi-specification permanent magnet surface-mounted permanent magnet synchronous motor rotor and an asymmetric magnetic isolation bridge synchronous reluctance motor rotor, the integrated rotor is symmetrically arranged in the axial direction to eliminate axial unbalanced electromagnetic force, an asymmetric design is adopted in the circumferential rotation direction, namely, the surface-mounted permanent magnet synchronous motor rotor and the synchronous reluctance motor rotor are arranged through a special offset angle, so that the maximum values of the permanent magnet torque and the reluctance torque of the motor can be superposed at the same current phase angle, two torque components of the motor are fully utilized, and the electromagnetic torque of the motor can be obviously improved on the premise of not changing the size, the using amount of the permanent magnet and the material of the motor. Meanwhile, the rotors which are axially integrated and configured have high flexibility in design and quantity, the segmented rotors can block the axial eddy current circulation path, the eddy current loss is effectively reduced under the high-speed working condition, and the overall performances of the motor such as efficiency and the like are greatly improved.
(2) The rotor of the surface-mounted permanent magnet synchronous motor adopts a multi-specification permanent magnet design, a special permanent magnet forming process is not needed, the air gap flux density waveform tends to be sinusoidal by optimizing the design size, the width of each permanent magnet is optimized when the object is optimized, and the width is optimized to meet the condition that the air gap flux density waveform tends to be sinusoidal. The design of ferrite with high magnetic conductivity, high resistivity, low loss and high temperature demagnetization resistance matched with neodymium iron boron is adopted, and the design also has obvious effect on reducing the cost and the loss of the motor.
(3) The reluctance rotor has higher mechanical strength and higher reluctance torque, can effectively reduce the using amount of the permanent magnet of the motor by matching with the permanent magnet motor, and has obvious effects on the aspects of saving the material cost of the motor, reducing the loss of an iron core and a magnet and the like. Meanwhile, the reluctance rotor adopts an auxiliary reinforcing rib design, so that torque pulsation can be effectively reduced, mechanical strength is enhanced, and stable, efficient and reliable operation of the motor is ensured.
Example two
The embodiment discloses a design method of a novel high-speed asymmetric integrated rotor type permanent magnet synchronous reluctance motor, which comprises the following steps:
the surface-mounted permanent magnet synchronous motor rotor and the synchronous reluctance motor rotor are provided with a mounting angle, and the mounting angle is an included angle between a magnetic pole central line of the surface-mounted permanent magnet synchronous motor rotor and central lines of two salient poles of the synchronous reluctance motor rotor, so that the maximum values of the permanent magnet torque and the reluctance torque of the motor can be superposed at the same current phase angle.
EXAMPLE III
The embodiment discloses a driving system, and the driving device comprises the asymmetric integrated rotor type permanent magnet synchronous reluctance motor and a controller, wherein the controller is electrically connected with the motor, and the motor is directly connected with a load.
This novel motor has integrateed multiple performance and has promoted the technique, under the prerequisite that does not increase motor machine manufacturing and the cooling degree of difficulty, reduce air gap flux density harmonic and promote permanent magnet torque through the many specifications of optimal design permanent magnet size, promote reluctance torque and reduce torque ripple through optimizing the magnetic isolation bridge, and through the design of the integrated configuration angle of rotor axial make permanent magnet torque and reluctance torque's maximum value superpose in the same electric current phase place angle department, as shown in fig. 2, permanent magnet torque and reluctance torque can be fully utilized, thereby promote performances such as motor torque and power density and efficiency comprehensively, and effectively reduce torque ripple. Compared with the traditional high-speed permanent magnet motor, the permanent magnet motor has the advantages of small permanent magnet consumption, low cost, less magnetic field harmonic wave, small torque pulsation, reduced motor loss under the high-speed working condition and high efficiency; compared with the traditional synchronous reluctance motor, the power factor and the efficiency are improved, the electromagnetic torque can be improved and the torque pulsation can be reduced by effectively superposing the reluctance torque and the permanent magnet torque, and the synchronous reluctance motor has a self-starting function; compared with a permanent magnet auxiliary type synchronous reluctance motor, the permanent magnet synchronous reluctance motor has the advantages of high permanent magnet utilization rate, less magnetic field harmonic waves, high permanent magnet torque and high rotor design freedom, and can fully improve the salient pole ratio and improve the reluctance torque. In addition, compared with various traditional high-speed motors, the axial multi-section rotor integration can effectively block an eddy current circulation path, and eddy current loss of the rotor under the high-speed condition is greatly reduced.
The rotor has high flexibility in design, the permanent magnet torque and the reluctance torque can be superposed at the same current phase angle through a specific configuration angle, the electromagnetic torque is obviously improved, the segmented rotor can block an axial eddy current circulation path, and the eddy current loss is effectively reduced. The permanent magnet surface-mounted permanent magnet synchronous motor rotor adopts a multi-specification permanent magnet design, so that the air gap flux density tends to be sinusoidal, the air gap flux density harmonic content is effectively reduced, the iron core loss is obviously reduced in a high-frequency and high-speed operating environment, and meanwhile, the torque pulsation is reduced. The application of the reluctance synchronous motor rotor can effectively reduce the using amount of the permanent magnet of the traditional high-speed permanent magnet synchronous motor, and has remarkable effects on the aspects of saving the material cost of the motor, reducing the loss of the iron core and the magnet and the like. Meanwhile, the reluctance rotor can adopt the design of an asymmetric magnetic isolation bridge and an auxiliary reinforcing rib, so that the torque pulsation can be effectively reduced, the mechanical strength can be enhanced, and the stable, efficient and reliable operation of the motor can be ensured.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (9)
1. The utility model provides a novel high-speed asymmetric integrated rotor formula PMSM, characterized by includes:
the rotor is integrated by a surface-mounted permanent magnet synchronous motor rotor and two synchronous reluctance motor rotors, and the surface-mounted permanent magnet synchronous motor rotor is clamped between the two synchronous reluctance motor rotors;
the surface-mounted permanent magnet synchronous motor rotor and the synchronous reluctance motor rotor are configured with a mounting angle, so that the maximum values of the permanent magnet torque and the reluctance torque of the motor can be superposed at the same current phase angle;
the stator is composed of a stator core and a stator winding, a plurality of stator slots are uniformly distributed in the stator, the stator winding is wound on the stator slots, and the stator core and the rotor core are formed by axially laminating silicon steel sheets.
2. The new high-speed asymmetric integrated rotor PMSM as claimed in claim 1, wherein said mounting angle is the angle between the centerline of the rotor pole of the surface-mounted PMSM and the centerline of the two salient poles of the PMSM rotor.
3. The new high speed asymmetric integrated rotor PMSM as claimed in claim 1, wherein said rotor is an axial three-layer structure, said rotor includes a shaft, a rotor core fixed to the shaft, permanent magnets are attached to the outer wall of the rotor core of the rotor of the surface-mounted PMSM, and each magnetic pole is equally spaced on the rotor of the surface-mounted PMSM.
4. The novel high-speed asymmetric integrated rotor type permanent magnet synchronous reluctance motor as claimed in claim 3, wherein the number of the magnetic poles of the rotor of the surface-mounted permanent magnet synchronous motor is set according to specific requirements, and each magnetic pole has the same structure.
5. The new high speed asymmetric integrated rotor PMSM as claimed in claim 4, characterized by that the poles of said rotor of surface mounted PMSM are made up of five permanent magnets arranged, the middle layer is NdFeB I, the two outer layers are NdFeB II, the two outermost layers are ferrites, the multi-specification permanent magnets make the air gap flux density wave tend to be sinusoidal, reducing the air gap flux density harmonic content.
6. A new high-speed asymmetric integrated rotor type permanent magnet synchronous reluctance motor as claimed in claim 1, wherein said synchronous reluctance motor rotor is composed of a rotor core and magnetic isolation bridges, each magnetic pole structure is the same and arranged at equal intervals in the rotation direction, the magnetic isolation bridges extend along the rotation axis direction.
7. The new high-speed asymmetric integrated rotor permanent magnet synchronous reluctance machine as claimed in claim 6, wherein each magnetic pole of said synchronous reluctance machine rotor adopts four layers of magnetic isolation bridges, each layer of magnetic isolation bridge is arranged from the rotating shaft to the edge of the synchronous reluctance machine rotor layer by layer, the magnetic isolation bridges are gradually reduced from the rotating shaft from inside to outside, the innermost magnetic isolation bridge is the largest and wraps the outer magnetic isolation bridge, and the outermost layer is a short strip magnetic isolation bridge.
8. A novel high-speed asymmetric integrated rotor type permanent magnet synchronous reluctance motor as claimed in claim 6 or 7, characterized in that an auxiliary reinforcing rib is arranged in the middle of each layer of magnetic isolation bridge.
9. A drive system, characterized in that said drive unit comprises a new high-speed asymmetric integrated rotor type permanent magnet synchronous reluctance motor as claimed in any one of the above claims 1 to 8 and a controller, the controller is electrically connected to the motor, and said motor is directly connected to the load.
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| CN112688511A (en) * | 2020-12-10 | 2021-04-20 | 山东大学 | Asymmetric integrated rotor type permanent magnet synchronous reluctance motor, method and application |
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| CN112688511A (en) * | 2020-12-10 | 2021-04-20 | 山东大学 | Asymmetric integrated rotor type permanent magnet synchronous reluctance motor, method and application |
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