CN115642768A - Annular magnetic regulating winding memory motor and magnetic regulating method - Google Patents
Annular magnetic regulating winding memory motor and magnetic regulating method Download PDFInfo
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- CN115642768A CN115642768A CN202211377299.3A CN202211377299A CN115642768A CN 115642768 A CN115642768 A CN 115642768A CN 202211377299 A CN202211377299 A CN 202211377299A CN 115642768 A CN115642768 A CN 115642768A
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Abstract
The invention provides a memory motor with an annular magnetic modulation winding and a magnetic modulation method, comprising a stator core; an AC armature winding disposed on the stator core; the annular magnetic regulating winding is placed on the stator core; a rotor core; a variable magnetic flux permanent magnet disposed in the rotor core; a constant flux permanent magnet disposed on the rotor core; a rotating shaft. The stator core is provided with a plurality of axial stator slots towards the air gap side and used for embedding a plurality of alternating current armature winding coils; the stator core is also provided with an annular stator slot towards the air gap side, and the annular stator slot is used for embedding a direct current annular magnetic regulating winding coil; a rotor iron core of the motor is divided into two sections along the axial direction, and variable magnetic flux permanent magnets and constant magnetic flux permanent magnets which are arranged at intervals are placed on iron cores at two ends. The annular magnetic regulating winding of the motor loads forward or reverse direct current pulses to change the magnetization state of the variable magnetic flux permanent magnet so as to regulate the air gap magnetic field intensity.
Description
Technical Field
The invention relates to the field of permanent magnet synchronous motor equipment, in particular to a memory motor with an annular magnetic modulation winding and a magnetic modulation method.
Background
The permanent magnet synchronous motor uses high-performance rare earth permanent magnet materials to improve the efficiency, power density, power factor and design freedom of the motor, and the high-performance rare earth permanent magnet materials gradually become the key research content of a high-performance motor driving system. However, the inherent permanent magnetic field of the permanent magnet synchronous motor is strong and is not easy to adjust, and the rotating speed operation range of the motor is greatly limited; and larger fault current is generated under the condition of weak magnetic fault of high-speed operation of the motor, and the fault tolerance is reduced. In a motor driving system which needs a wide speed regulation range and high fault tolerance performance, such as an electric automobile driving motor, an aviation generator, a machine tool spindle motor and the like, the motor is expected to keep high efficiency, large torque, quick dynamic response, quick fault demagnetization and the like in a wide rotating speed range, and the motor is required to flexibly adjust a no-load air gap magnetic field under different working conditions. Although the magnetic field of the permanent magnet synchronous motor can be adjusted by loading the direct-axis armature current along with the development of a vector control theory and a power electronic technology, the continuously applied magnetic field adjusting current generates extra copper loss and reactive current, the efficiency and the power factor of the motor are reduced, and the advantages of the permanent magnet synchronous motor are weakened.
In response to this problem, a variable flux memory motor structure was proposed in 2001, which has a basic structure similar to a general permanent magnet synchronous motor, including an ac armature winding disposed on a stator core and a permanent magnet disposed on a rotor core. However, compared with the conventional permanent magnet synchronous motor, the variable flux memory motor adopts a special variable flux permanent magnet, the magnetization state of the variable flux permanent magnet can be changed by loading current pulses, and the magnetization state can be memorized and maintained after the current pulses are finished. Therefore, the magnetization state of the permanent magnet is flexibly enhanced or weakened by loading current pulses with different properties, so that the permanent magnet can keep a strong magnetization state when a large torque output requirement is met, and can keep a weak magnetization state when a high rotating speed output requirement is met, and further the motor can keep high-performance output in the whole wide rotating speed operation range.
However, the traditional variable flux memory motor utilizes an alternating current armature winding to load direct-axis pulse current to complete the adjustment of the magnetization state of the variable flux permanent magnet, the armature direct-axis pulse current can occupy the capacity of the alternating current armature winding and an inverter, and the torque output function of the motor is influenced when the pulse current is loaded; more importantly, the amplitude of the armature direct axis pulse current for completing the magnetization state adjustment of the variable magnetic flux permanent magnet generally obviously exceeds the rated current amplitude value of the motor, which brings difficulty to the effective magnetic adjustment of the variable magnetic flux memory motor.
In the academic paper of Hybrid Variable-Magnetic-Force Motors published in 2011, the authors propose to complete the Magnetic field regulation of the Variable Magnetic flux memory motor by using a special annular Magnetic regulating winding. The motor comprises a stator core, an alternating current armature winding and a direct current annular magnetic regulating winding, wherein the alternating current armature winding and the direct current annular magnetic regulating winding are embedded in the stator core, the rotor core is divided into two sections along the axial direction, an interval is arranged between the two sections, the constant magnetic flux permanent magnets magnetized along the radial direction are placed on the two sections of the cores to form rotor magnetic poles, and the variable magnetic flux permanent magnets magnetized along the axial direction are placed between the two sections of the rotor cores. In this way, the magnetic field of the motor can be adjusted by loading direct current pulses on the annular magnetic field adjusting winding. However, it should be noted that the variable magnetic flux permanent magnet in the technical scheme has only one piece, and the axial magnetization is adopted, so that the magnetic regulation capacity is limited; the constant-flux permanent magnet generates only one polarity of magnetic poles in any one core segment, forming a continuous-pole structure.
In an academic paper published in 2003, namely "Current-Pole Permanent-magnetic Machine With Extended Field-Weakening Capability", an author proposes a hybrid excitation motor structure which utilizes a special annular magnetic adjusting winding to complete air gap magnetic Field adjustment. The motor comprises a stator core, an alternating current armature winding and a direct current annular magnetic regulating winding, wherein the alternating current armature winding and the direct current annular magnetic regulating winding are embedded in the stator core, the rotor core is divided into two sections along the axial direction, a constant magnetic flux permanent magnet which is magnetized along the radial direction adopts a continuous-pole structure and is placed on the two sections of the core to form a rotor magnetic pole, and the annular magnetic regulating winding loads constant direct current to regulate an air gap magnetic field. It should be pointed out that the permanent magnet without variable magnetic flux in the technical scheme belongs to the field of hybrid excitation motors and does not belong to a variable magnetic flux memory motor, and the loaded direct current magnetic regulating current can be used for regulating the air gap magnetic field force only if the direct current magnetic regulating current exists all the time, so that the copper consumption required by the motor magnetic regulation is large, and the direct current loses the magnetic regulating energy once being removed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a memory motor with an annular magnetic modulation winding and a magnetic modulation method.
The invention provides a memory motor with an annular magnetic regulating winding, which comprises a stator core, an alternating current armature winding, an annular magnetic regulating winding, a rotor core, a variable magnetic flux permanent magnet, a constant magnetic flux permanent magnet and a rotating shaft, wherein:
a plurality of axially through stator slots are uniformly distributed on the air gap side of the stator core along the circumferential direction and used for embedding an alternating current armature winding;
an annular stator slot is arranged on the air gap side of the axial middle position of the stator core and used for embedding a direct-current annular magnetic regulating winding coil;
the rotor core is positioned inside the stator core; the rotor iron core is divided into a first rotor section iron core and a second rotor section iron core which are independent along the axial direction, and a non-magnetic conduction interval is arranged between the first rotor section iron core and the second rotor section iron core;
the first rotor section iron core and the second rotor section iron core are respectively provided with a variable magnetic flux permanent magnet and a constant magnetic flux permanent magnet, and the two permanent magnets form magnetic poles with opposite polarities and are arranged at intervals along the circumferential direction;
the rotating shaft is positioned in the rotor core and is coaxial with the stator core and the rotor core, and the rotating shaft and the rotor core can rotate around the rotating shaft.
Preferably, the alternating current armature winding and the annular magnetic regulating winding are independent from each other, and alternating current is loaded on the alternating current armature winding; the annular magnetic regulating winding is loaded with forward or reverse direct current.
Preferably, the variable flux permanent magnets are placed on two segments of the rotor core, providing radial magnetic fields that act as different poles on the two rotor segment cores.
Preferably, the variable magnetic flux permanent magnet is a permanent magnet with adjustable and memorable remanence, the remanence of the permanent magnet can be changed after the annular magnetic regulation winding is loaded with the direct current pulse, and the changed remanence of the permanent magnet can be memoried after the direct current pulse current is finished.
Preferably, the constant flux permanent magnets are placed on two segments of the rotor core, providing radial magnetic fields that act as different poles on the two rotor segment cores.
Preferably, the first rotor segment iron core is provided with a variable magnetic flux permanent magnet and a constant magnetic flux permanent magnet, the two permanent magnets respectively and independently form a rotor magnetic pole, the variable magnetic flux permanent magnet forms an S pole, the constant magnetic flux permanent magnet forms an N pole, and the variable magnetic flux permanent magnet and the constant magnetic flux permanent magnet are arranged at intervals along the circumferential direction;
the second rotor section iron core is also provided with a variable magnetic flux permanent magnet and a constant magnetic flux permanent magnet, the two permanent magnets respectively and independently form a rotor magnetic pole, the variable magnetic flux permanent magnet forms an N pole, the constant magnetic flux permanent magnet forms an S pole, and the variable magnetic flux permanent magnet and the constant magnetic flux permanent magnet are arranged at intervals along the circumferential direction.
Preferably, the stator core and the rotor core are made of silicon steel stamped sheets through pressing and stacking; the constant magnetic flux permanent magnet is made of neodymium iron boron, and the variable magnetic flux permanent magnet is made of aluminum nickel cobalt; the rotating shaft is made of magnetic conductive materials.
Preferably, the constant-flux permanent magnet and the variable-flux permanent magnet are both of an embedded V-shaped structure and are placed on the rotor iron core.
According to the invention, the magnetic regulating method based on the annular magnetic regulating winding memory motor comprises the following steps:
an alternating current loading step: the alternating current armature winding loads alternating current to finish the electromagnetic power output of the motor, and corresponding main magnetic flux only circulates in a two-dimensional plane vertical to the axial axis of the motor;
and D, direct current pulse loading: the ring-shaped magnetic regulating winding loads forward or reverse direct current pulses to complete the adjustment of the magnetization state of the variable magnetic flux permanent magnet, corresponding main magnetic flux flows in a three-dimensional space, and a flow path comprises a stator iron core, a first rotor section iron core, a rotating shaft and a second rotor section iron core.
Compared with the prior art, the invention has the following beneficial effects:
1. the motor is provided with two sets of independent electric loops, wherein one set of electric loop is formed by an alternating current armature winding and is used for loading alternating current to output electromagnetic power; the other set of electric loop is composed of an annular magnetic regulating winding and is used for loading direct current pulses to realize air gap magnetic field regulation; the two sets of electric loops are mutually isolated, the design parameters are flexible, the control modes are various, the magnetic regulating current of the annular magnetic regulating winding does not occupy the current capacity of the alternating current armature winding, and the capacity of an inverter connected with the alternating current armature winding is favorably reduced.
2. The motor of the invention adjusts the magnetization state of the variable magnetic flux permanent magnet on the rotor by loading forward or reverse direct current pulses on the annular magnetic regulating winding, so as to change the air gap magnetic field intensity, thereby realizing high-performance operation of the motor in a wide rotating speed range according to the working condition requirement, and the magnetic regulating direct current loading time is very short, and the copper consumption in the magnetic regulating process is very small.
3. The motor simultaneously adopts the variable magnetic flux permanent magnet and the constant magnetic flux permanent magnet which respectively serve as different magnetic poles in the two rotor iron core sections, so that the motor has wide magnetic regulation range and high power density; in addition, the same permanent magnet is used as magnetic poles with different polarities in the two rotor core sections, so that the direct current pulse loaded by the annular magnetic regulating winding can be ensured to have a good magnetic regulating effect.
4. In the motor, in any rotor core section, the magnetic poles formed by the variable magnetic flux permanent magnets and the magnetic poles formed by the constant magnetic flux permanent magnets are arranged at intervals and are in a series structure on a magnetic circuit, so that the working point of the variable magnetic flux permanent magnets can be relatively stable, and accidental demagnetization can be avoided.
5. The phase number, the pole slot number, the alternating current armature winding type and the rotor permanent magnet type of the motor are flexible and diversified, so that the annular magnetic regulating winding memory motor has a wide application range.
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 (a) is a schematic 1/4 model three-dimensional structure diagram of a memory motor with a circular magnetic modulation winding according to an embodiment of the present invention.
Fig. 1 (b) is a schematic cross-sectional view of a 1/4 model of the corresponding two rotor core segments.
Fig. 2 is a schematic diagram of the magnetic flux flow direction and magnetic flux regulation principle of a memory motor with a ring-shaped magnetic regulation winding according to an embodiment of the present invention.
Fig. 3 shows a no-load back-emf waveform diagram of a memory motor with a toroidal magnetic tuning winding loaded with a forward dc current pulse and a reverse dc current pulse according to an embodiment of the present invention.
The figures show that:
AC armature winding 2
Annular magnetic regulating winding 3
First rotor core segment 41
Second rotor core segment 42
First constant flux permanent magnet 51
Second constant flux permanent magnet 52
Variable flux permanent magnet 6
First variable flux permanent magnet 61
Second variable flux permanent magnet 62
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.
FIG. 1 (a) is a schematic diagram of a 1/4 model three-dimensional structure of a memory motor with a ring-shaped magnetic modulation winding according to the present invention; fig. 1 (b) is a schematic cross-sectional view of a 1/4 model of the corresponding two rotor core segments. The embodiment of the invention is a three-phase stator 48-slot/rotor 8-pole motor, and due to the symmetry of the motor, a 1/4 model can sufficiently represent key characteristics of the motor. As shown in the figure, the motor of the present embodiment includes a stator core 1, an ac armature winding 2, a toroidal field-adjusting winding 3, a rotor core 4, a constant-flux permanent magnet 5, a variable-flux permanent magnet 6, and a rotating shaft 7. The stator core 1 is axially provided with a plurality of axially through stator slots, and the stator slots are axially through and used for placing the alternating current armature winding 2; the stator core 1 is provided with an annular stator slot at the axial central position for placing an annular armature winding 3; the rotor core 4 is positioned inside the stator core 1 and is axially divided into two independent rotor core sections, namely a first rotor core section 41 and a second rotor core section 42, and an axial non-magnetic-conduction interval is arranged between the two sections; the axial length of the non-magnetic conduction interval is equivalent to that of the annular groove of the stator; the first rotor core section 41 is uniformly provided with a first constant magnetic flux permanent magnet 51 and a first variable magnetic flux permanent magnet 61, the two permanent magnets respectively and independently form a rotor magnetic pole, the two permanent magnets respectively form magnetic poles with opposite polarities and are arranged at intervals, wherein the first constant magnetic flux permanent magnet 51 forms an N pole, and the first variable magnetic flux permanent magnet 61 forms an S pole; the second constant-flux permanent magnet 52 and the second variable-flux permanent magnet 62 are uniformly placed on the second rotor core section 42, the two permanent magnets respectively and independently form a rotor magnetic pole, the two permanent magnets respectively form magnetic poles with opposite polarities and are arranged at intervals, wherein the second constant-flux permanent magnet 52 forms an S pole, and the second variable-flux permanent magnet 62 forms an N pole; the rotating shaft 7 is positioned in the rotor core 4, has magnetic permeability and is coaxial with the stator core 1 and the rotor core 4; the rotor core 4 and the rotating shaft 7 rotate around the rotating shaft in synchronization.
Specifically, the stator core 1 and the rotor core 4 of the motor of the embodiment are made of silicon steel stamped sheets through lamination; the constant magnetic flux permanent magnet 5 is made of neodymium iron boron, the variable magnetic flux permanent magnet 6 is made of aluminum nickel cobalt, and both the permanent magnets are used for generating radial magnetic flux; the rotating shaft 7 is made of magnetic conductive material.
The constant flux permanent magnet 5 and the variable flux permanent magnet 6 of the motor of the embodiment both adopt an embedded V-shaped structure and are placed on the rotor core 4. On the first rotor core section 41, the first constant-flux permanent magnet 51 forming the N pole and the first variable-flux permanent magnet 61 forming the S pole are connected in series in a magnetic circuit, and the first constant-flux permanent magnet 51 helps to stabilize the operating point of the first variable-flux permanent magnet 61 and avoid accidental demagnetization. On the second rotor core segment 42, the second constant-flux permanent magnet 52 constituting the S pole and the second variable-flux permanent magnet 62 constituting the N pole are connected in series in a magnetic circuit, and the second constant-flux permanent magnet 52 helps stabilize the operating point of the second variable-flux permanent magnet 62 and prevent accidental demagnetization. Further, at a certain rotor circumferential position, the N pole on the first rotor core segment 41 is constituted by a first constant-flux permanent magnet 51, and the N pole on the second rotor core segment 42 at the same rotor circumferential position is constituted by a second variable-flux permanent magnet 62; at another rotor circumferential position after 45 degrees of rotation, the S-pole on the first rotor core segment 41 is formed by a first variable-flux permanent magnet 61, and the S-pole on the second rotor core segment 42 at the same rotor circumferential position is formed by a second constant-flux permanent magnet 52. In this way, the magnetic poles formed by the permanent magnets 5 with constant magnetic flux and the permanent magnets 6 with variable magnetic flux are arranged at intervals in a single rotor core section, and are alternately arranged between the two rotor core sections.
The alternating current armature winding 2 and the annular magnetic regulating winding 3 are mutually independent, the alternating current armature winding 2 is similar to an armature winding of a traditional alternating current motor and consists of a plurality of coils, and the current flow direction in the winding inside the stator core is parallel to the axial direction of a rotating shaft of the motor; the alternating current armature winding 2 loads alternating current and can output the power of the motor so as to complete the conversion between the mechanical energy and the electric energy of the motor, namely output the electromagnetic power; the annular magnetic regulating winding 3 only comprises a coil, the coil is positioned at the axial center of the stator core, and the plane where the current flow direction in the coil is positioned is vertical to the axis of the rotating shaft of the machine; accordingly, the annular magnetic regulating winding 3 is loaded with direct current in a forward direction or a reverse direction to complete the magnetization state regulation of the variable-flux permanent magnet, namely, to change the air-gap magnetic field strength of the motor. Specifically, the ac armature winding 2 of the motor of this embodiment loads three-phase symmetric ac current, interacts with radial magnetic fluxes generated by the permanent magnet 5 with constant magnetic flux and the permanent magnet 6 with variable magnetic flux on the rotor core, and outputs electromagnetic power, thereby completing energy conversion between mechanical energy and electrical energy of the motor. The annular magnetic regulating winding 3 of the motor of the embodiment loads a forward or reverse direct current pulse, so that a three-dimensional magnetic field containing radial magnetic flux and axial magnetic flux is generated, the residual magnetism of the variable magnetic flux permanent magnet 6 is increased or reduced, the no-load air gap magnetic field intensity of the motor is changed, the corresponding magnetic flux flow path is a three-dimensional path, and the flow path comprises a stator core, two sections of rotor cores and a rotating shaft. And after the direct current pulse is finished, the regulated remanence of the variable magnetic flux permanent magnet 6 is memorized and reserved. Specifically, the remanence of the variable magnetic flux permanent magnet 6 is adjustable and memorable, the remanence of the variable magnetic flux permanent magnet can be changed by loading a direct current pulse through the annular magnetism adjusting winding, and the changed remanence of the variable magnetic flux permanent magnet can be memorable after the direct current pulse current is finished. Therefore, the residual magnetism state of the variable magnetic flux permanent magnet and the corresponding no-load air gap magnetic field intensity can be flexibly adjusted according to different operation working conditions of the motor. When a stronger air gap magnetic field is needed to improve the torque output capacity, a positive direct current pulse is loaded in the annular magnetic regulating winding, the remanence of the variable magnetic flux permanent magnet is improved, the air gap magnetic field is enhanced, and the large torque output is realized; when a weaker air gap magnetic field is needed to expand the high-rotation-speed operation capacity, reverse direct current pulses are loaded in the annular magnetic regulating winding, the residual magnetism of the variable-flux permanent magnet is reduced, the air gap magnetic field is weakened, and high-rotation-speed operation is achieved.
More specifically, the number of phases of the motor and the number of the stator and rotor tooth grooves are flexible and various, and the number or the form of the arrangement can be adjusted according to the specific conditions of each embodiment. The structure of the ac armature winding may be a distributed winding, or a concentrated winding. The permanent magnets placed on the rotor core can adopt a surface-mounted structure or an embedded structure. The axial lengths of the two rotor core segments may be the same or different; the permanent magnets placed in the two rotor core segments may be the same or different in shape and size.
Further referring to fig. 2, the three-dimensional magnetic field flow direction when the ring-shaped magnetic field regulating winding 3 is loaded with the forward direct current pulse can be seen, and the magnetic regulating mechanism of the motor can be further explained. At this time, the magnetic field adjusting flow path is as shown by the arrow, and flows from the stator core portion corresponding to the first rotor core section 41 to the air gap side along the radial direction, and enters the first rotor core section 41 through the air gap, the magnetic flux flowing direction is the same as the magnetization direction of the variable magnetic flux permanent magnet magnetic pole 61, further, the magnetic field adjusting magnetic flux flows through the rotating shaft along the axial direction, and then flows out through the first rotor core section 42 along the radial direction, at this time, the magnetic field adjusting flow direction is the same as the magnetization direction of the variable magnetic flux permanent magnet magnetic pole 62, and then, the magnetic field adjusting magnetic field flows out through the air gap along the radial direction, and enters the stator core, forming a closed loop. It can be seen that the passage of the magnetic field is a three-dimensional magnetic circuit comprising a radial direction and an axial direction. The flowing direction of the magnetic field is consistent with the direction of the magnetic poles 61 and 62 of the variable magnetic flux permanent magnet, namely, the magnetic field is enhanced, the magnetization state of the variable magnetic flux permanent magnet 6 is improved, and the no-load air gap magnetic field is enhanced.
If the annular magnetic regulating winding 3 is loaded with reverse direct current pulses, the path of the three-dimensional magnetic regulating magnetic field is consistent with that when the forward direct current pulses are loaded, but the direction is opposite. Accordingly, the flow direction of the magnetic field is opposite to the magnetization direction of the magnetic poles 61 and 62 of the variable-flux permanent magnet, namely, the demagnetizing effect is achieved, the magnetization state of the variable-flux permanent magnet 6 is reduced, and the no-load air gap magnetic field is weakened.
In summary, it can be seen that the magnetization state of the variable-flux permanent magnet can be effectively changed by loading the forward or reverse direct current pulse on the ring-shaped magnetic regulating winding 3, so as to realize air-gap magnetic field regulation.
To better illustrate the implementation effect of the present application, fig. 3 schematically shows a no-load back-emf waveform diagram of the ac armature winding after the forward dc current pulse and the reverse dc current pulse are applied to the ring-shaped magnetic regulating winding of the ring-shaped magnetic regulating winding memory motor according to the present embodiment. It can be seen that after the annular magnetic regulating winding is loaded with direct current pulse currents in different directions, the no-load alternating-current back electromotive force amplitude of the motor is obviously changed, and a good magnetic regulating effect is reflected.
Aiming at the defects in the prior art, the invention arranges a set of independent annular magnetic regulating winding on the stator, and adopts variable magnetic flux permanent magnets and constant magnetic flux permanent magnets on two isolated rotor iron core sections to form a rotor N pole and a rotor S pole in an interlaced manner, and can change the magnetization state of the variable magnetic flux permanent magnets by loading forward or reverse direct current pulses on the annular magnetic regulating winding, thereby realizing air gap magnetic field regulation. The direct current magnetic regulating current pulse is only loaded on the annular magnetic regulating winding, the magnetic regulation is flexible and convenient, the magnetic regulating current is irrelevant to the alternating current armature winding, and the alternating current capacity of the motor is not influenced; on the other hand, the variable magnetic flux permanent magnet and the constant magnetic flux permanent magnet are magnetized along the radial direction and are distributed and placed in the two rotor iron core sections, so that the motor is ensured to have good power density and a good magnetic regulation range.
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.
Claims (8)
1. The utility model provides a magnetic winding memory motor is transferred to annular, its characterized in that, includes stator core, interchange armature winding, magnetic winding is transferred to annular, rotor core, variable magnetic flux permanent magnet, invariable magnetic flux permanent magnet and pivot, wherein:
a plurality of axially through stator slots are uniformly distributed on the air gap side of the stator core along the circumferential direction and used for embedding an alternating current armature winding;
an annular stator slot is arranged on the air gap side of the axial middle position of the stator core and used for embedding a direct-current annular magnetic regulating winding coil;
the rotor core is positioned inside the stator core; the rotor iron core is divided into a first rotor section iron core and a second rotor section iron core which are independent along the axial direction, and a non-magnetic conduction interval is arranged between the first rotor section iron core and the second rotor section iron core;
the first rotor section iron core and the second rotor section iron core are respectively provided with a variable magnetic flux permanent magnet and a constant magnetic flux permanent magnet, and the two permanent magnets form magnetic poles with opposite polarities and are arranged at intervals along the circumferential direction;
the rotating shaft is positioned in the rotor core and is coaxial with the stator core and the rotor core, and the rotating shaft and the rotor core can rotate around the rotating shaft.
2. The toroidal field modulated winding memory motor of claim 1, wherein said ac armature winding and said toroidal field modulated winding are independent of each other, the ac armature winding being loaded with an ac current; the annular magnetic regulating winding is loaded with forward or reverse direct current.
3. A circular modulated flux winding memory machine according to claim 1, characterized in that the variable flux permanent magnets are placed on two segments of the rotor core providing radial magnetic fields that act as different poles on the two rotor segment cores.
4. The ring-shaped magnetic modulation winding memory motor according to claim 1, wherein the variable magnetic flux permanent magnet is a permanent magnet with adjustable and memorable remanence, the remanence of the permanent magnet can be changed after the ring-shaped magnetic modulation winding is loaded with a direct current pulse, and the changed remanence of the permanent magnet can be memoried after the direct current pulse current is finished.
5. A circular modulated flux winding memory machine according to claim 1, characterized in that said constant flux permanent magnets are placed on two segments of the rotor core, providing radial magnetic fields that act as different poles on the two rotor segment cores.
6. The circular field modulated winding memory motor of claim 1, wherein:
the variable magnetic flux permanent magnet and the constant magnetic flux permanent magnet are placed on the first rotor section iron core, the two permanent magnets respectively and independently form a rotor magnetic pole, the variable magnetic flux permanent magnet forms an S pole, the constant magnetic flux permanent magnet forms an N pole, and the variable magnetic flux permanent magnet and the constant magnetic flux permanent magnet are arranged at intervals along the circumferential direction;
the second rotor section iron core is also provided with a variable magnetic flux permanent magnet and a constant magnetic flux permanent magnet, the two permanent magnets respectively and independently form a rotor magnetic pole, the variable magnetic flux permanent magnet forms an N pole, the constant magnetic flux permanent magnet forms an S pole, and the variable magnetic flux permanent magnet and the constant magnetic flux permanent magnet are arranged at intervals along the circumferential direction.
7. The circular flux modulating winding memory motor of claim 1, wherein the stator core and the rotor core are laminated with silicon steel laminations; the constant magnetic flux permanent magnet is made of neodymium iron boron, and the variable magnetic flux permanent magnet is made of aluminum nickel cobalt; the rotating shaft is made of magnetic conductive materials.
8. The magnetic tuning method of the circular magnetic tuning winding memory motor according to any one of claims 1 to 7, characterized by comprising the following steps:
an alternating current loading step: the alternating current armature winding loads alternating current to complete the electromagnetic power output of the motor, and corresponding main magnetic flux only circulates in a two-dimensional plane vertical to the axial axis of the motor;
and D, direct current pulse loading: the ring-shaped magnetic regulating winding loads forward or reverse direct current pulses to complete the adjustment of the magnetization state of the variable magnetic flux permanent magnet, corresponding main magnetic flux flows in a three-dimensional space, and a flow path comprises a stator iron core, a first rotor section iron core, a rotating shaft and a second rotor section iron core.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211377299.3A CN115642768A (en) | 2022-11-04 | 2022-11-04 | Annular magnetic regulating winding memory motor and magnetic regulating method |
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| CN202211377299.3A CN115642768A (en) | 2022-11-04 | 2022-11-04 | Annular magnetic regulating winding memory motor and magnetic regulating method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117239969A (en) * | 2023-11-15 | 2023-12-15 | 湖南大学 | Outer rotor variable magnetic flux alternating pole permanent magnet synchronous motor |
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2022
- 2022-11-04 CN CN202211377299.3A patent/CN115642768A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117239969A (en) * | 2023-11-15 | 2023-12-15 | 湖南大学 | Outer rotor variable magnetic flux alternating pole permanent magnet synchronous motor |
| CN117239969B (en) * | 2023-11-15 | 2024-03-15 | 湖南大学 | Outer rotor variable magnetic flux alternating pole permanent magnet synchronous motor |
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