CN114157064B - W-type hybrid excitation permanent magnet reluctance motor rotor structure - Google Patents
W-type hybrid excitation permanent magnet reluctance motor rotor structure Download PDFInfo
- Publication number
- CN114157064B CN114157064B CN202111246373.3A CN202111246373A CN114157064B CN 114157064 B CN114157064 B CN 114157064B CN 202111246373 A CN202111246373 A CN 202111246373A CN 114157064 B CN114157064 B CN 114157064B
- Authority
- CN
- China
- Prior art keywords
- rotor
- pole
- permanent magnet
- layer
- shaped cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention relates to a W-type hybrid excitation permanent magnet reluctance motor rotor structure, which comprises 4 rotor S poles and 4 rotor N poles; the outer surfaces of the S pole and the N pole of the rotor are provided with curved grooves, and a first layer of W-shaped cavity groove and a second layer of W-shaped cavity groove are formed in the curved grooves; the middle positions of the first layer of W-shaped cavity groove and the second layer of W-shaped cavity groove are embedded with high magnetic energy product permanent magnets, the two sides of the inner side of the first layer of W-shaped cavity groove are embedded with medium magnetic energy product permanent magnets, and the two sides of the outer side of the first layer of W-shaped cavity groove are embedded with low magnetic energy product permanent magnets; long-nozzle wine bottle grooves are arranged in the rotor S pole and the rotor N pole; the S poles of the permanent magnets with high magnetic energy product in the S pole and the N pole of the rotor face downwards and upwards respectively, and the S poles of the permanent magnets with low magnetic energy product and the S poles of the permanent magnets with medium magnetic energy product in the S pole and the N pole of the rotor face obliquely downwards and obliquely upwards respectively; the W-type hybrid excitation permanent magnet reluctance motor rotor structure has the advantages of high air gap magnetic field sine degree, good speed regulation characteristic, flexible torque control, high torque density and difficult permanent magnet demagnetization.
Description
Technical Field
The invention relates to the technical field of motor rotors, in particular to a W-shaped hybrid excitation permanent magnet reluctance motor rotor structure.
Background
In recent years, due to the excessive exploitation of rare earth permanent magnetic materials, the reserve amount of rare earth in China is greatly reduced, the price of rare earth is increased year by year, and under the background that the national policy strongly supports the development of electric automobiles, the rare earth crisis adds uncertain factors to the large-scale popularization and application of the electric automobiles. How to reduce the cost of the permanent magnet motor has become a focus of attention in the field of the permanent magnet motor. In recent years, low-performance permanent magnets such as ferrite permanent magnet motors have become hot spots for motor industry research due to low manufacturing cost. However, the residual magnetic density and magnetic energy product of the non-rare earth materials are lower, so that the power density and efficiency of the non-rare earth permanent magnet motor are obviously lower than those of the rare earth permanent magnet motor.
In order to improve the output performance of the non-rare earth low magnetic energy product permanent magnet motor, the reluctance torque is required to make up for the lower permanent magnet torque output. In the process, the motor is often required to operate in a deep weak magnetic state, and the low-magnetic energy product permanent magnet has a low coercive force characteristic and is difficult to bear the weak magnetic action of a large current, so that the non-rare earth motor has the risk of irreversible demagnetization, the problem of contradiction between the improvement of output torque and the avoidance of the irreversible demagnetization is solved, and the key problem which needs to be solved urgently in the field of motors is formed; therefore, a W-type hybrid excitation permanent magnet reluctance motor rotor structure which has high air gap magnetic field sine degree, good speed regulation characteristic, flexible torque control, high torque density and permanent magnet difficult field loss is urgently needed in the production and use industries of the existing non-rare earth low magnetic energy product permanent magnet motors.
Disclosure of Invention
The invention aims to overcome the defects and provide the rotor structure of the W-shaped mixed excitation permanent magnet reluctance motor, which has the advantages of high air gap magnetic field sine degree, good speed regulation characteristic, flexible torque control, high torque density and difficult permanent magnet demagnetization.
The purpose of the invention is realized by the following steps:
a W-type hybrid excitation permanent magnet reluctance motor rotor structure comprises 4 rotor S poles and 4 rotor N poles, wherein the rotor S poles and the rotor N poles are arranged adjacently, and the radian of the circle center of a rotor corresponding to each rotor S pole and each rotor N pole is 45 degrees; the outer surfaces of the S pole and the N pole of the rotor are provided with curved grooves to form a non-uniform surface structure; a first layer of W-shaped cavity groove and a second layer of W-shaped cavity groove are formed in the S pole and the N pole of the rotor respectively, and are arranged in parallel; the bending track of the curved groove is the same as that of the first layer of W-shaped cavity groove; the middle positions of the first layer of W-shaped cavity groove and the second layer of W-shaped cavity groove are embedded with high magnetic energy product permanent magnets, the high magnetic energy product permanent magnets are horizontally arranged, and the magnetization direction is vertical; permanent magnets with medium magnetic energy product are embedded in two sides of the inner sides of the first layer of W-shaped cavity groove and the second layer of W-shaped cavity groove; permanent magnets with low magnetic energy product are embedded in two sides of the outer sides of the first layer of W-shaped cavity groove and the second layer of W-shaped cavity groove; long-mouth wine bottle type grooves are formed in the S pole and the N pole of the rotor and are positioned between two adjacent first-layer W-shaped cavity grooves; the charging and demagnetizing windings are placed in the long-nozzle wine bottle type groove, the charging and demagnetizing windings are copper wire windings, and the winding directions of two adjacent charging and demagnetizing windings are opposite; the S pole of the permanent magnet with high magnetic energy product in the S pole of the rotor faces downwards, and the S poles of the permanent magnet with low magnetic energy product and the permanent magnet with medium magnetic energy product in the S pole of the rotor face obliquely downwards; the S pole of the high magnetic energy product permanent magnet in the N pole of the rotor faces upwards, and the S poles of the low magnetic energy product permanent magnet and the medium magnetic energy product permanent magnet in the N pole of the rotor face obliquely upwards.
The invention relates to a W-type hybrid excitation permanent magnet reluctance motor rotor structure, wherein an included angle between the magnetization direction of a medium magnetic energy product permanent magnet and the vertical direction is more than 42 degrees; and the included angle between the magnetization direction of the low magnetic energy product permanent magnet and the vertical direction is more than 40 degrees.
The invention relates to a W-type hybrid excitation permanent magnet reluctance motor rotor structure.
The invention relates to a W-type hybrid excitation permanent magnet reluctance motor rotor structure, wherein the center of a first layer of W-type cavity groove and the center of a second layer of W-type cavity groove are connected with the circle center of a rotor to form the d-axis direction of the rotor, and the place 22.5 degrees away from the d-axis direction is the q-axis direction of the rotor; the first d-axis flux path passes through the long mouth portion of the long mouth wine bottle-shaped slot; the second d-axis magnetic flux path penetrates through the bottom of the long-mouth wine bottle type groove; the first q-axis magnetic flux path passes through a middle zone surrounded by the second W-shaped cavity groove, the long-mouth wine bottle-shaped groove and the round-corner rectangular cavity; a second q-axis magnetic flux path passes through the middle clamping channel of the first layer of W-shaped cavity groove and the second layer of W-shaped cavity groove; the third q-axis flux path is via a pole island constructed with a curved slot and a first layer of W-shaped cavity slots.
Compared with the prior art, the invention has the beneficial effects that:
according to the rotor structure of the W-type hybrid excitation permanent magnet reluctance motor, the curved grooves are formed in the surface of the rotor, and the low-magnetic-energy-product permanent magnets, the medium-magnetic-energy-product permanent magnets and the high-magnetic-energy-product permanent magnets with different magnetic energy products are embedded into the first layer of W-type cavity groove and the second layer of W-type cavity groove, so that the air gap magnetic field sine degree of the motor can be improved, the counter potential sine degree is improved, and the control of the motor is facilitated; the long-mouth wine bottle type groove is arranged, so that the salient pole rate of the rotor is improved; the magnetizing and demagnetizing windings are placed in the long-nozzle wine bottle grooves, exciting currents in the magnetic windings form magnetomotive force, and the direction of the magnetomotive force can be adjusted by adjusting the direction of direct current, so that the permanent magnets are magnetized and demagnetized, the air gap magnetic field is flexibly adjusted, the regulation and control of the motor magnetic field are facilitated, and the speed regulation performance and the torque control flexibility of a motor formed by the rotor are improved; only the magnetizing direction of the high-magnetic-energy-product permanent magnet and the magnetomotive force direction generated by the exciting current of the magnetizing and demagnetizing winding are on the same straight line in the first layer of W-shaped cavity groove and the second layer of W-shaped cavity groove, and the magnetizing direction of the outermost low-magnetic-energy-product permanent magnet and the demagnetizing magnetic force direction have a large angle, so that the low-magnetic-energy-product permanent magnet is less influenced by the current of the magnetizing and demagnetizing winding and is not easy to generate the risk of irreversible demagnetization of the permanent magnet; three layers of q-axis magnetic paths are generated in the rotor by the first layer of W-shaped cavity groove 9, the second layer of W-shaped cavity groove, the long-mouth wine bottle groove and the middle round-corner rectangular cavity groove, so that the q-axis magnetic resistance is smaller than the d-axis magnetic resistance, the salient pole rate of the rotor is improved, and the torque density is improved.
Drawings
Fig. 1 is a structural schematic diagram of a rotor structure of a W-type hybrid excitation permanent magnet reluctance motor according to the present invention.
Fig. 2 is a schematic structural diagram of a rotor permanent magnet arrangement form and a d-q axis magnetic circuit in a rotor structure of a W-type hybrid excitation permanent magnet reluctance motor according to the present invention.
Fig. 3 is a schematic structural diagram of a demagnetizing field below a rotor S pole in a rotor structure of a W-type hybrid excitation permanent magnet reluctance motor according to the present invention.
Fig. 4 is a schematic structural diagram of a demagnetizing field below a rotor N pole in a rotor structure of a W-type hybrid excitation permanent magnet reluctance motor according to the present invention.
Fig. 5 is a schematic structural diagram of a magnetizing field under the S pole of the rotor in the rotor structure of the W-type hybrid excitation permanent magnet reluctance motor according to the present invention.
Fig. 6 is a schematic structural diagram of a magnetizing field under a rotor N pole in a rotor structure of a W-type hybrid excitation permanent magnet reluctance motor according to the present invention.
Fig. 7 is a magnetic density cloud chart of a low-magnetic-energy-product permanent magnet, a medium-magnetic-energy-product permanent magnet and a high-magnetic-energy-product permanent magnet in the rotor structure of the W-type hybrid excitation permanent magnet reluctance motor before and after demagnetization.
FIG. 8 is a graph of a low magnetic energy product permanent magnet, a medium magnetic energy product permanent magnet and a high magnetic energy product permanent magnet before and after demagnetization in a rotor structure of a W-type hybrid excitation permanent magnet reluctance motor.
Wherein: the rotor comprises a rotor S pole 1, a rotor N pole 2, a low magnetic energy product permanent magnet 3, a medium magnetic energy product permanent magnet 4, a high magnetic energy product permanent magnet 5, a long-nozzle wine bottle type groove 6, a magnetizing and demagnetizing winding 7, a round-corner rectangular cavity 8, a first W-shaped cavity groove 9, a second W-shaped cavity groove 10, a first q-axis magnetic flux path 11, a second q-axis magnetic flux path 12, a third q-axis magnetic flux path 13, a first d-axis magnetic flux path 14, a second d-axis magnetic flux path 15 and a curved groove 16.
Detailed Description
Referring to fig. 1 to 8, the rotor structure of a W-type hybrid excitation permanent magnet reluctance motor according to the present invention includes 4S poles 1 and 4N poles 2, where the S poles 1 and the N poles 2 are adjacently disposed, and the radians of the centers of the rotor circles corresponding to the S poles 1 and the N poles 2 are both 45 °; the outer surfaces of the rotor S pole 1 and the rotor N pole 2 are provided with curved grooves 16 to form a non-uniform surface structure; a first layer of W-shaped cavity groove 9 and a second layer of W-shaped cavity groove 10 are formed in the rotor S pole 1 and the rotor N pole 2 respectively, and the first layer of W-shaped cavity groove 9 and the second layer of W-shaped cavity groove 10 are arranged in parallel; the bending track of the curved groove 16 is the same as that of the first layer of W-shaped cavity groove 9; the high magnetic energy product permanent magnet 5 is embedded in the middle of the first layer of W-shaped cavity groove 9 and the second layer of W-shaped cavity groove 10, the high magnetic energy product permanent magnet 5 is horizontally arranged, and the magnetization direction is vertical; the middle magnetic energy product permanent magnets 4 are embedded in two sides of the inner sides of the first layer of W-shaped cavity groove 9 and the second layer of W-shaped cavity groove 10, and the included angle between the magnetization direction of the middle magnetic energy product permanent magnets 4 and the vertical direction is more than 42 degrees; the low magnetic energy product permanent magnets 3 are embedded into two sides of the outer sides of the first layer of W-shaped cavity groove 9 and the second layer of W-shaped cavity groove 10, and the included angle between the magnetization direction of the low magnetic energy product permanent magnets 3 and the vertical direction is more than 40 degrees; the sine degree of an air gap magnetic field of the motor can be improved by arranging the curved groove 16 on the surface of the rotor and embedding the low magnetic energy product permanent magnet 3, the medium magnetic energy product permanent magnet 4 and the high magnetic energy product permanent magnet 5 with different magnetic energy products into the first layer of W-shaped cavity groove 9 and the second layer of W-shaped cavity groove 10, so that the sine degree of a back electromotive force is improved, and the control of the motor is facilitated; round-angle rectangular cavities 8 are formed in the positions, close to the inner surface of the rotor, of the rotor S pole 1 and the rotor N pole 2 and can be used as a third layer of magnetic barriers of the rotor;
long-nozzle wine bottle type grooves 6 are formed in the rotor S pole 1 and the rotor N pole 2, the long-nozzle wine bottle type grooves 6 are located between two adjacent first-layer W-shaped cavity grooves 9, and the long-nozzle wine bottle type grooves 6 are beneficial to improving the salient pole rate of the rotor; the charging and demagnetization windings 7 are placed in the long-nozzle wine bottle type groove 6, the charging and demagnetization windings 7 are copper wire windings, and the winding directions of the two adjacent charging and demagnetization windings 7 are opposite; therefore, when direct current is supplied to the magnetizing and demagnetizing windings 7, one current flow of two adjacent magnetizing and demagnetizing windings 7 is perpendicular to the paper surface and flows from the outside to the inside, and the other current flow is perpendicular to the paper surface and flows from the inside to the outside; the excitation current in the magnetizing and demagnetizing winding 7 forms magnetomotive force, and the direction of the magnetomotive force can be adjusted by adjusting the direction of direct current, so that the permanent magnet can be magnetized and demagnetized, the air gap magnetic field can be flexibly adjusted, the regulation and control of the motor magnetic field are facilitated, and the speed regulation performance and the torque control flexibility of the motor formed by the rotor are improved.
The S pole of the permanent magnet 5 with high magnetic energy product in the rotor S pole 1 faces downwards, and the S poles of the permanent magnet 3 with low magnetic energy product and the permanent magnet 4 with medium magnetic energy product in the rotor S pole 1 face obliquely downwards; when the rotor S pole 1 is demagnetized, the current of the demagnetization winding 7 filled in the long-nozzle wine bottle groove 6 on the right side of the first layer of W-shaped cavity groove 9 is vertical to the paper surface and flows from outside to inside, and the current of the demagnetization winding 7 filled in the long-nozzle wine bottle groove 6 on the left side is vertical to the paper surface and flows from inside to outside, so that the direction of a generated demagnetization magnetic field is vertical and upward, and is opposite to the overall downward magnetic field generated by the low magnetic energy product permanent magnet 3, the medium magnetic energy product permanent magnet 4 and the high magnetic energy product permanent magnet 5, and a demagnetization effect is generated; for the high magnetic energy product permanent magnet 5, because the magnetic field direction of the high magnetic energy product permanent magnet 5 is vertical downward, the direct current magnetic field plays a role in demagnetizing the high magnetic energy product permanent magnet 5 in the weak magnetic speed increasing process of the motor; for the low-magnetic-energy-product permanent magnet 3 and the medium-magnetic-energy-product permanent magnet 4, because the magnetic field direction and the demagnetizing field direction form a certain angle, the demagnetizing effect of the direct-current demagnetizing field on the two types of permanent magnets is weaker, so that the low-magnetic-energy-product permanent magnet 3 and the medium-magnetic-energy-product permanent magnet 4 are free from the risk of irreversible demagnetization, and the large-current heavy-load operation of the motor of the low-magnetic-energy-product permanent magnet 3 becomes possible; when the rotor S pole 1 is magnetized, the current of the demagnetization winding 7 filled in the long-nozzle wine bottle groove 6 on the right side of the first layer of W-shaped cavity groove 9 is vertical to the paper surface and flows outwards from the inner part, the current of the demagnetization winding 7 filled in the long-nozzle wine bottle groove 6 on the left side is vertical to the paper surface and flows inwards from the outer part, therefore, the direction of the generated demagnetization magnetic field is vertical downwards, the generated demagnetization magnetic field is the same as the overall downwards magnetic field generated by the low magnetic energy product permanent magnet 3, the medium magnetic energy product permanent magnet 4 and the high magnetic energy product permanent magnet 5, and the magnetizing effect is generated.
The S pole of the permanent magnet 5 with high magnetic energy product in the rotor N pole 2 faces upwards, and the S poles of the permanent magnet 3 with low magnetic energy product and the permanent magnet 4 with medium magnetic energy product in the rotor N pole 2 face obliquely upwards; when the N pole 2 of the rotor is demagnetized, the current of the demagnetizing winding 7 filled in the long-nozzle wine bottle groove 6 on the right side of the first layer of W-shaped cavity groove 9 is vertical to the paper surface and flows from the inner part to the outer part, the current of the demagnetizing winding 7 filled in the long-nozzle wine bottle groove 6 on the left side is vertical to the paper surface and flows from the outer part to the inner part, so that the direction of a generated demagnetizing magnetic field is vertical to the lower part and is opposite to the overall upward magnetic field generated by the low magnetic energy product permanent magnet 3, the medium magnetic energy product permanent magnet 4 and the high magnetic energy product permanent magnet 5, and a demagnetizing effect is generated; for the high magnetic energy product permanent magnet 5, because the magnetic field direction of the high magnetic energy product permanent magnet 5 is vertical upwards, the direct current magnetic field plays a role in demagnetizing the high magnetic energy product permanent magnet 5 in the weak magnetic speed increasing process of the motor; for the low-magnetic-energy-product permanent magnet 3 and the medium-magnetic-energy-product permanent magnet 4, because the magnetic field direction and the demagnetizing field direction form a certain angle, the demagnetizing effect of the direct-current demagnetizing field on the two types of permanent magnets is weaker, so that the low-magnetic-energy-product permanent magnet 3 and the medium-magnetic-energy-product permanent magnet 4 are free from the risk of irreversible demagnetization, and the large-current heavy-load operation of the motor of the low-magnetic-energy-product permanent magnet 3 becomes possible; when the N pole 2 of the rotor is magnetized, the current of the demagnetizing winding 7 filled in the long-nozzle wine bottle groove 6 on the right side of the first layer of W-shaped cavity groove 9 is vertical to the paper surface and flows from the outside to the inside, the current of the demagnetizing winding 7 filled in the long-nozzle wine bottle groove 6 on the left side is vertical to the paper surface and flows from the inside to the outside, so that the direction of the generated demagnetizing magnetic field is vertical and upward, and the generated demagnetizing magnetic field is the same as the overall upward magnetic field generated by the low magnetic energy product permanent magnet 3, the medium magnetic energy product permanent magnet 4 and the high magnetic energy product permanent magnet 5, and the magnetizing effect is generated.
Referring to fig. 7 and 8, under the action of the dc demagnetization current, the high magnetic energy product permanent magnet 5 is most affected by the demagnetization current, and as the load current increases, the difference between the magnetic flux density before and after demagnetization is about 0.5T; the low magnetic energy product permanent magnet 3 and the medium magnetic energy product permanent magnet 4 have a certain included angle between the magnetization direction and the direct current demagnetizing current, so that the demagnetizing current has small influence on the magnetic density value; before and after demagnetization, the magnetic density of the high magnetic energy product permanent magnet 5 is changed by about 0.5T, and the low magnetic energy product permanent magnet 3 is positioned at the outermost side of each magnetic pole, so that the influence of direct current demagnetization current on the low magnetic energy product permanent magnet is minimum, and the magnetic density is basically unchanged before and after demagnetization. Therefore, the permanent magnet arranged in the W shape has the function of irreversible demagnetization resistance, and the flexibility and the variability of the air gap magnetic field are realized, and the use reliability of the motor is favorably enhanced.
The connecting line of the centers of the first layer of W-shaped cavity groove 9 and the second layer of W-shaped cavity groove 10 and the circle center of the rotor forms the direction of a d axis of the rotor, and the position 22.5 degrees away from the direction of the d axis is the direction of a q axis of the rotor; the first d-axis magnetic flux path 14 penetrates through the long-mouth part of the long-mouth wine bottle type groove 6, and permanent magnets of an S pole 1 and an N pole 2 of two adjacent rotors are connected in series; the second d-axis magnetic flux path 15 penetrates through the bottom of the long-mouth wine bottle type groove 6, and permanent magnets of the S pole 1 and the N pole 2 of the two adjacent rotors are connected in series; the first q-axis magnetic flux path 11 passes through a middle zone surrounded by the second layer of W-shaped cavity groove 10, the long-mouth wine bottle-shaped groove 6 and the round-corner rectangular cavity 8; a second q-axis magnetic flux path 12 passes through the middle clamping channel of the first layer W-shaped cavity groove 9 and the second layer W-shaped cavity groove 10; a third q-axis flux path 13 via a pole island constructed with a curved slot 16 and a first layer of W-shaped cavity slots 9; therefore, the q-axis magnetic resistance is smaller than the d-axis magnetic resistance, so that the salient pole rate of the rotor is improved, and the torque density is improved.
In addition: it should be noted that the above-mentioned embodiment is only a preferred embodiment of the present patent, and any modification or improvement made by those skilled in the art based on the above-mentioned conception is within the protection scope of the present patent.
Claims (4)
1. A W-type hybrid excitation permanent magnet reluctance motor rotor structure comprises 4 rotor S poles (1) and 4 rotor N poles (2), wherein the rotor S poles (1) and the rotor N poles (2) are arranged adjacently, and the radians of the centers of the rotor circles corresponding to the rotor S poles (1) and the rotor N poles (2) are both 45 degrees; the outer surfaces of the S pole (1) and the N pole (2) of the rotor are provided with curved grooves (16) to form a non-uniform surface structure; a first layer of W-shaped cavity groove (9) and a second layer of W-shaped cavity groove (10) are formed in the rotor S pole (1) and the rotor N pole (2), and the first layer of W-shaped cavity groove (9) and the second layer of W-shaped cavity groove (10) are arranged in parallel; the bending track of the curved groove (16) is the same as that of the first layer of W-shaped cavity groove (9); the middle positions of the first layer of W-shaped cavity groove (9) and the second layer of W-shaped cavity groove (10) are embedded with high magnetic energy product permanent magnets (5), the high magnetic energy product permanent magnets (5) are horizontally arranged, and the magnetization direction is vertical; the two sides of the inner sides of the first layer of W-shaped cavity groove (9) and the second layer of W-shaped cavity groove (10) are embedded with the permanent magnet (4) with medium magnetic energy product; permanent magnets (3) with low magnetic energy product are embedded in two sides of the outer sides of the first layer of W-shaped cavity groove (9) and the second layer of W-shaped cavity groove (10); long-nozzle wine bottle grooves (6) are formed in the rotor S pole (1) and the rotor N pole (2), and the long-nozzle wine bottle grooves (6) are located between two adjacent first-layer W-shaped cavity grooves (9); the charging and demagnetizing windings (7) are placed in the long-nozzle wine bottle type groove (6), the charging and demagnetizing windings (7) are copper wire windings, and the winding directions of the two adjacent charging and demagnetizing windings (7) are opposite; the S pole of the high magnetic energy product permanent magnet (5) in the S pole (1) of the rotor faces downwards, and the S poles of the low magnetic energy product permanent magnet (3) and the medium magnetic energy product permanent magnet (4) in the S pole (1) of the rotor face obliquely downwards; the S pole of the high magnetic energy product permanent magnet (5) in the N pole (2) of the rotor faces upwards, and the S poles of the low magnetic energy product permanent magnet (3) and the medium magnetic energy product permanent magnet (4) in the N pole (2) of the rotor face obliquely upwards.
2. The rotor structure of the W-type hybrid excitation permanent magnet reluctance machine according to claim 1, wherein: the included angle between the magnetization direction of the medium magnetic energy product permanent magnet (4) and the vertical direction is more than 42 degrees; the included angle between the magnetization direction of the low magnetic energy product permanent magnet (3) and the vertical direction is more than 40 degrees.
3. The rotor structure of the W-type hybrid excitation permanent magnet reluctance machine according to claim 1, wherein: round-corner rectangular cavities (8) are formed in the positions, close to the inner surface of the rotor, of the S pole (1) and the N pole (2) of the rotor.
4. The rotor structure of the W-type hybrid excitation permanent magnet reluctance motor according to claim 3, wherein: the center of the first layer of W-shaped cavity groove (9) and the center of the second layer of W-shaped cavity groove (10) are connected with the circle center of the rotor to form a d-axis direction of the rotor, and a place 22.5 degrees away from the d-axis direction is in a q-axis direction of the rotor; a first d-axis magnetic flux path (14) passes through the long-mouth portion of the long-mouth wine bottle groove (6); a second d-axis magnetic flux path (15) passes through the bottom of the long-mouth wine bottle type groove (6); the first q-axis magnetic flux path (11) penetrates through a middle zone surrounded by the second W-shaped cavity groove (10), the long-mouth wine bottle-shaped groove (6) and the round-corner rectangular cavity (8); a second q-axis magnetic flux path (12) passes through a middle clamping channel of the first layer of W-shaped cavity groove (9) and the second layer of W-shaped cavity groove (10); the third q-axis flux path (13) is via a pole island constructed with a curved slot (16) and a first layer of W-shaped cavity slots (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111246373.3A CN114157064B (en) | 2021-10-26 | 2021-10-26 | W-type hybrid excitation permanent magnet reluctance motor rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111246373.3A CN114157064B (en) | 2021-10-26 | 2021-10-26 | W-type hybrid excitation permanent magnet reluctance motor rotor structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114157064A CN114157064A (en) | 2022-03-08 |
| CN114157064B true CN114157064B (en) | 2023-01-03 |
Family
ID=80458665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111246373.3A Active CN114157064B (en) | 2021-10-26 | 2021-10-26 | W-type hybrid excitation permanent magnet reluctance motor rotor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114157064B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009232505A (en) * | 2008-03-19 | 2009-10-08 | Yaskawa Electric Corp | Rotating field type synchronous machine |
| CN107968502A (en) * | 2017-12-21 | 2018-04-27 | 珠海格力电器股份有限公司 | Motor rotor and permanent magnet motor |
| CN109510347A (en) * | 2017-09-15 | 2019-03-22 | 丰田自动车株式会社 | Rotating electric machine |
| CN112072811A (en) * | 2020-08-03 | 2020-12-11 | 东南大学 | Embedded-permanent magnet reluctance type mixed magnetic pole type memory motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4489002B2 (en) * | 2005-10-26 | 2010-06-23 | 三菱電機株式会社 | Hybrid excitation rotating electric machine and vehicle equipped with hybrid excitation rotating electric machine |
-
2021
- 2021-10-26 CN CN202111246373.3A patent/CN114157064B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009232505A (en) * | 2008-03-19 | 2009-10-08 | Yaskawa Electric Corp | Rotating field type synchronous machine |
| CN109510347A (en) * | 2017-09-15 | 2019-03-22 | 丰田自动车株式会社 | Rotating electric machine |
| CN107968502A (en) * | 2017-12-21 | 2018-04-27 | 珠海格力电器股份有限公司 | Motor rotor and permanent magnet motor |
| CN112072811A (en) * | 2020-08-03 | 2020-12-11 | 东南大学 | Embedded-permanent magnet reluctance type mixed magnetic pole type memory motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114157064A (en) | 2022-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108599418A (en) | A kind of rotor core and motor of magnetic circuit tandem type hybrid permanent magnet controllable flux motor | |
| CN109088494B (en) | Built-in hybrid permanent magnet memory motor with parallel local magnetic circuits | |
| CN104578659B (en) | A kind of Magneticflux-switching type hybrid permanent magnet memory electrical machine in parallel | |
| CN103078466B (en) | Magnetism-gathering-type magnetic flux switching permanent magnet memory motor | |
| CN103066719B (en) | A kind of magneticfocusing stator permanent magnetic type vernier motor | |
| CN108110980A (en) | Mid-series type has the adjustable flux electric machine of hybrid permanent magnet of passive adjustable magnetic magnetic barrier | |
| CN104467334B (en) | A kind of stator magneticfocusing hybrid permanent magnet memory electrical machine | |
| CN110707841B (en) | Magnetism-gathering type double-salient-pole hybrid permanent magnet memory motor | |
| CN109951038B (en) | Bilateral excitation type tangential magnetic steel mixed excitation brushless motor | |
| CN112072811B (en) | Embedded-permanent magnet reluctance type mixed magnetic pole type memory motor | |
| CN109995211A (en) | A kind of stator is the same as polar form hybrid permanent magnet memory electrical machine | |
| CN105811616A (en) | Tangential sectional type magnetic steel and permanent magnet synchronous motor rotor equipped with same | |
| CN109936230A (en) | A kind of series circuit type two-layer hybrid permanent magnetism memory electrical machine | |
| CN113014009B (en) | Permanent magnet series-parallel type variable magnetic circuit adjustable magnetic flux motor | |
| CN104578636A (en) | Double-stator axial magnetic field flux-switching type mixing permanent magnetic memory motor | |
| CN101562384B (en) | Magnetic-field-enhanced permanent-magnetic switching flux linkage motor with high fault tolerance | |
| CN112311180B (en) | Double-stator hybrid excitation type axial magnetic field flux switching motor | |
| CN107425629B (en) | Permanent magnet motor rotor | |
| CN109831082B (en) | Built-in magnetic steel hybrid excitation motor based on brushless alternating current excitation | |
| CN110350689A (en) | Composite permanent magnet motor | |
| CN109950992A (en) | Separated type combination magnetic pole hybrid permanent magnet is adjustable flux permanent magnet synchronous motor | |
| CN110739822B (en) | Parallel magnetic circuit memory motor and operation method | |
| CN111262356B (en) | Low-cost high-power density single-phase high-speed hybrid excitation permanent magnet motor and method | |
| CN114157064B (en) | W-type hybrid excitation permanent magnet reluctance motor rotor structure | |
| CN110138165B (en) | Composite magnetic circuit stator split type axial permanent magnet motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |