CN109067037B - High-torque-density hybrid permanent magnet motor rotor structure - Google Patents
High-torque-density hybrid permanent magnet motor rotor structure Download PDFInfo
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- CN109067037B CN109067037B CN201810938901.3A CN201810938901A CN109067037B CN 109067037 B CN109067037 B CN 109067037B CN 201810938901 A CN201810938901 A CN 201810938901A CN 109067037 B CN109067037 B CN 109067037B
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- 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
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- 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
- H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets
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- 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
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a high-torque-density hybrid permanent magnet motor rotor structure, which belongs to the technical field of motors, wherein a plurality of rectangular grooves (2) are formed in the upper edge of a rotor in the direction vertical to the circumference, the lower ends of the rectangular grooves (2) are communicated with an arch-shaped groove (3), rectangular ferrites (7) are embedded in the communicating grooves, and the magnetization direction of the ferrites (7) is tangential and vertical to the surface of a permanent magnet; the upper end of the rectangular groove (2) is communicated with the T-shaped groove (4); v-shaped grooves (5) are formed in the left side and the right side of the T-shaped groove (4); a reinforcing rib (6) is arranged at the other end part of the V-shaped groove (5) opposite to the opening; neodymium iron boron (8) with the same polarity are embedded in the left groove and the right groove of the V-shaped groove (5); v-arrangement groove (5) are close strengthening rib (6) side and are equipped with dovetail groove (9) in order to restrict the removal of neodymium iron boron (8). The invention can not only improve the torque density of the hybrid permanent magnet motor, but also reduce the magnetic leakage and improve the utilization rate of the permanent magnet and the motor efficiency.
Description
Technical Field
The invention discloses a high-torque-density hybrid permanent magnet motor rotor structure, and belongs to the technical field of motors.
Background
Rare earth materials are widely applied to industrial production of motors and the like, but rare earth is used as a strategic resource, the supply is unstable throughout the year, and the price is continuously increased. Therefore, the non-rare earth permanent magnet with low price and stable supply is adopted, such as the ferrite part replaces the rare earth permanent magnet to be applied to the motor, and the manufacturing cost of the motor can be obviously reduced. However, the magnetic energy product of the ferrite is far lower than that of the neodymium iron boron permanent magnet material, and the coercive force is lower, so that the high torque density of the motor is ensured while the use amount of the rare earth permanent magnet material is reduced through reasonable rotor design. And to improve the demagnetization resistance of the motor, are important points. Aiming at the problems, the two permanent magnets are reasonably arranged through the structural design of the rotor, so that the cost can be reduced, the torque density of the motor can be improved, the loss of an iron core and eddy current can be reduced, and the efficiency of the motor can be improved.
The working principle of the hybrid permanent magnet motor is that two types of hybrid permanent magnets are used as excitation sources and are arranged in a rotor to generate a magnetic field, and the magnetic field interacts with a rotating magnetic field generated by the electrical excitation of a stator, so that the rotor rotates. Although the permanent magnet is arranged in the rotor to have a salient pole effect and can use reluctance torque, magnetic leakage is inevitable, the utilization rate of the permanent magnet is reduced, the magnetic energy product of the ferrite permanent magnet material is far lower than that of neodymium iron boron, the coercive force is also lower, and the ferrite permanent magnet material is easy to demagnetize. Therefore, the permanent magnets are reasonably arranged, and the magnetic isolation grooves can reduce the cost and improve the torque density and the efficiency of the motor.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the rotor structure of the hybrid permanent magnet motor, which not only can reduce the cost of the traditional rare earth permanent magnet motor, but also can improve the torque density of the motor and the efficiency of the motor simultaneously due to the design of the position of the permanent magnet and the magnetic isolation magnetic barrier.
In order to achieve the purpose, the invention adopts the technical scheme that:
a rotor structure of a hybrid permanent magnet motor is characterized in that a plurality of rectangular grooves (2) are formed in the rotor in the direction perpendicular to the circumferential direction, the lower ends of the rectangular grooves (2) are communicated with an arch-shaped groove (3), rectangular ferrites (7) are embedded in the communicating grooves, and the magnetization direction of the ferrites (7) is tangential and perpendicular to the surface of a permanent magnet; the upper end of the rectangular groove (2) is communicated with the T-shaped groove (4); v-shaped grooves (5) are formed in the left side and the right side of the T-shaped groove (4); a reinforcing rib (6) is arranged at the other end part of the V-shaped groove (5) opposite to the opening; neodymium iron boron (8) with the same polarity are embedded in the left groove and the right groove of the V-shaped groove (5); v-arrangement groove (5) are close strengthening rib (6) side and are equipped with dovetail groove (9) in order to restrict the removal of neodymium iron boron (8).
Preferably: the arch-shaped groove (3) is of an arch bridge-shaped structure and comprises an outer layer circular arc and an inner layer circular arc, the inner layer circular arc and the outer layer circular arc are parallel, and the inner layer circular arc close to the rotating shaft is tangent to the ferrite (7) so as to limit the movement of the ferrite (7).
Preferably: the upper layer I-shaped part of the T-shaped groove (4) comprises inner and outer layer arcs which are parallel to the rotor arc. The lower 1-shaped part is communicated with the rectangular groove 2, and the width of the lower 1-shaped part is narrower than that of the rectangular groove 2, so that the movement of the ferrite 7 is limited.
Preferably: the opening of the V-shaped groove (5) points to the stator, and the opening is communicated with the adjacent T-shaped grooves (4) on the two sides.
Preferably: the number of the rectangular grooves (2) is 6, and the ratio of the width to the length of the rectangular grooves is 1: 1.5-2.
Preferably: the ratio of the width of the arch-shaped groove (3) to the width of the ferrite (7) is 1:1.75-2.25, the ratio of the distance from the upper side arc line of the arch-shaped groove (3) to the arc center thereof to the distance from the lower side arc line thereof to the arc center thereof is 1-2: 3.
preferably: the ratio of the width of the 1-shaped part at the lower layer of the T-shaped groove (4) to the width of the ferrite (7) is 1:1.75-2.25, and the ratio of the 1-shaped width at the upper layer of the T-shaped groove to the 1-shaped width is 1-1.25: 1.
Preferably: the width of neodymium iron boron (8) is about 1 with its length ratio: 7.5-8.5, and the ratio of the width of the reinforcing rib (6) to the width of the neodymium iron boron (8) is 0.75-1.25: 1.
Preferably, the lower side of the trapezoidal groove (9) forms an α angle with the end of the neodymium iron boron (8), and the angle of the α is 60-85 degrees.
Preferably, the chamfer (11) and the end of the neodymium iron boron (8) form an included angle of β, and the included angle of β is 120-150 degrees.
Compared with the prior art, the rotor structure of the hybrid permanent magnet motor provided by the invention has the following beneficial effects:
1. the rotor is provided with a rectangular groove along the circumferential direction, the lower side of the rectangular groove is provided with an arched groove communicated with the rectangular groove, and the arched groove is used for adjusting a magnetic flux path and playing a role in planning a magnetic circuit. Therefore, the magnetic leakage can be reduced by optimizing the width of the arched groove, the distance from the arc centers of the upper layer and the lower layer and the length-width ratio of the rectangular groove, and the motor efficiency is high.
2. The T-shaped groove that the circumference department is close to the rectangular channel upside is equipped with the intercommunication, and the T-shaped groove left and right sides is equipped with the V-arrangement groove, has inlayed the same neodymium iron boron of polarity in controlling two grooves, and the direction of magnetization perpendicular to neodymium iron boron surface. The upper side of the neodymium iron boron and the ferrite form a series magnetic circuit, and the lower side of the neodymium iron boron and the ferrite form a parallel magnetic circuit, so that the utilization rate of the permanent magnet can be improved by optimizing the using amount and the position of the ferrite and the neodymium iron boron, the torque density is improved, and the demagnetization resistance of the ferrite is improved.
The V-shaped groove bottom is equipped with the dovetail groove, and the dovetail groove can restrict the removal of neodymium iron boron, and plays the effect that reduces the magnetic leakage. And a reinforcing rib is arranged between the two trapezoidal grooves, so that the mechanical strength of the motor is improved.
And 4, the upper side arc of the T-shaped groove has a certain distance from the circumference of the rotor, so that the magnetic leakage at the aggregation position of three permanent magnets can be effectively reduced while the mechanical strength is ensured, and the motor efficiency is improved.
In conclusion, the hybrid permanent magnet motor can improve the torque density of the hybrid permanent magnet motor, reduce magnetic leakage and improve the utilization rate of the permanent magnet and the motor efficiency.
Drawings
FIGS. 1 to 4 are drawings illustrating embodiment 1
FIG. 1 is a rotor structure diagram of a hybrid permanent magnet motor with high torque density
FIG. 2 is a view showing the structure of a rectangular groove, an arcuate groove and a T-shaped groove
FIG. 3 is a view showing the structure of V-shaped or rectangular groove
Fig. 4 is a schematic view of the magnetization directions of the ndfeb and ferrite permanent magnet materials, and the arrow direction in the figure is the magnetization direction.
The structure comprises a silicon steel sheet 1, a rectangular groove 2, an arched groove 3, a T-shaped groove 4, a V-shaped groove 5, a reinforcing rib 6, a ferrite permanent magnet material 7, a neodymium iron boron permanent magnet material 8, a trapezoid groove 9 and an included angle α between neodymium iron boron and the lower inclined plane of the trapezoid groove.
FIGS. 5 to 8 are drawings illustrating embodiment 2
FIG. 5 is a rotor structure diagram of a hybrid permanent magnet motor with high torque density
FIG. 6 is a structural view of a rectangular groove, an arcuate groove and a rectangular open groove
FIG. 7 is a view showing the structure of V-shaped or rectangular groove
Fig. 8 is a schematic view showing the magnetization directions of the ndfeb and ferrite permanent magnet materials, wherein the arrow direction is the magnetization direction.
The angle gauge comprises a silicon steel sheet 1, a rectangular groove 2, an arc-shaped groove 3, a rectangular open groove 4, a V-shaped groove 5, a reinforcing rib 6, a ferrite permanent magnet 7, a neodymium iron boron permanent magnet 8, a trapezoid groove 9, a reinforcing rib 10, a chamfer 11, α, an included angle between neodymium iron boron and a lower inclined plane of the trapezoid groove, and an included angle between the neodymium iron boron and the chamfer β.
Detailed Description
Example 1
Example 1 of the present invention is further illustrated with reference to FIGS. 1-4.
A rotor structure of a hybrid permanent magnet motor is characterized in that a plurality of rectangular grooves (2) are formed in the rotor in the direction perpendicular to the circumferential direction, the lower ends of the rectangular grooves (2) are communicated with an arch-shaped groove (3), rectangular ferrites (7) are embedded in the communicating grooves, and the magnetization direction of the ferrites (7) is tangential and perpendicular to the surface of a permanent magnet; the upper end of the rectangular groove (2) is communicated with the T-shaped groove (4); v-shaped grooves (5) are formed in the left side and the right side of the T-shaped groove (4); a reinforcing rib (6) is arranged at the other end part of the V-shaped groove (5) opposite to the opening; neodymium iron boron (8) with the same polarity are embedded in the left groove and the right groove of the V-shaped groove (5); v-arrangement groove (5) are close strengthening rib (6) side and are equipped with dovetail groove (9) in order to restrict the removal of neodymium iron boron (8).
The arch-shaped groove (3) is of an arch bridge-shaped structure and comprises an outer layer circular arc and an inner layer circular arc, the inner layer circular arc and the outer layer circular arc are parallel, and the inner layer circular arc close to the rotating shaft is tangent to the ferrite (7) so as to limit the movement of the ferrite (7).
The upper layer I-shaped part of the T-shaped groove (4) comprises inner and outer layer arcs which are parallel to the rotor arc. The lower 1-shaped part is communicated with the rectangular groove 2, and the width of the lower 1-shaped part is narrower than that of the rectangular groove 2, so that the movement of the ferrite 7 is limited.
The opening of the V-shaped groove (5) points to the stator, and the opening is communicated with the adjacent T-shaped grooves (4) on the two sides.
The number of the rectangular grooves (2) is 6, and the width and the length of each rectangular groove are respectively 2mm and 3.5 mm.
The width of the arch-shaped groove (3) is 1mm, the width of the ferrite (7) is 2mm, and the distance between the upper side arc line of the arch-shaped groove (3) and the arc center of the arch-shaped groove and the distance between the lower side arc line of the arch-shaped groove (3) and the arc center of the arch-shaped groove are 2.5mm and 3.5mm respectively.
The width of the 1-shaped part at the lower layer of the T-shaped groove (4) is 1mm, and the width of the one-shaped part at the upper layer is 1.15 mm.
The width of neodymium iron boron (8) is 1mm and 8mm respectively rather than length, the width of strengthening rib (6) is 1.05 mm.
The downside of dovetail groove (9) becomes α contained angles with the tip of neodymium iron boron (8), α's contained angle is 75.
Example 2
Example 2 of the present invention is further illustrated with reference to fig. 5-8.
A rotor structure of a hybrid permanent magnet motor is characterized in that a plurality of rectangular grooves (2) are formed in the rotor in the direction perpendicular to the circumferential direction, the lower ends of the rectangular grooves (2) are communicated with an arch-shaped groove (3), rectangular ferrites (7) are embedded in the communicating grooves, and the magnetization direction of the ferrites (7) is tangential and perpendicular to the surface of a permanent magnet; a rectangular open slot (4) is formed in the circumference of the rotor, and the upper end of the rectangular slot (2) is communicated with the rectangular open slot (4); v-shaped grooves (5) are formed in the left side and the right side of the rectangular open groove (4); a reinforcing rib (6) is arranged at the other end part of the V-shaped groove (5) opposite to the opening; neodymium iron boron (8) with the same polarity are embedded in the left groove and the right groove of the V-shaped groove (5); v-arrangement groove (5) are close strengthening rib (6) side and are equipped with dovetail groove (9) in order to restrict the removal of neodymium iron boron (8).
The arch-shaped groove (3) is of an arch bridge-shaped structure and comprises an outer layer circular arc and an inner layer circular arc, the inner layer circular arc and the outer layer circular arc are parallel, and the inner layer circular arc close to the rotating shaft is tangent to the ferrite (7) so as to limit the movement of the ferrite (7).
The directional stator of opening in V-arrangement groove (5), opening part both ends are equipped with strengthening rib (10) to improve mechanical strength, reduce the magnetic leakage.
The number of the rectangular grooves (2) is 6, and the width and the length of each rectangular groove are respectively 2mm and 3.5 mm.
The width of the arch-shaped groove (3) is 1mm, the width of the ferrite (7) is 2mm, and the distance between the upper side arc line of the arch-shaped groove (3) and the arc center of the arch-shaped groove and the distance between the lower side arc line of the arch-shaped groove (3) and the arc center of the arch-shaped groove are 2.5mm and 3.5mm respectively.
The width of the rectangular open slot (4) is 1mm, and the rectangular open slot is arranged along the circumferential direction to form an irregular rotor circumference.
The width of neodymium iron boron (8) is 1mm and 8mm respectively rather than length, the width of strengthening rib (6) is 1.05 mm.
The downside of dovetail groove (9) becomes α contained angles with the tip of neodymium iron boron (8), α's contained angle is 75.
The inclined plane (11) and the end of neodymium iron boron (8) form an β included angle, and the included angle of β is 140 degrees.
The utilization rate of the permanent magnet is improved by reasonably designing two mixed permanent magnet structures, a plurality of rectangular grooves are arranged on a rotor which takes the axis of a rotating shaft as the center of a circle, tangential magnetized ferrite magnetic steel is embedded in the rectangular grooves, and the magnetization direction is vertical to the magnetic steel surface; the bottom of the rectangular groove is provided with an arched groove communicated with the rectangular groove, and the arched groove is used for adjusting a magnetic flux path and reducing the end magnetic leakage of ferrite; the upper end of the rectangular groove is provided with a T-shaped groove/a rectangular open groove which is communicated with the rectangular groove, the groove plays a role in magnetic isolation, the end part magnetic leakage of two mixed permanent magnets is reduced, and the utilization rate of the permanent magnets is improved; v-shaped grooves are formed in the left side and the right side of the T-shaped groove, neodymium iron boron permanent magnet steel with the same magnetic pole is embedded in the V-shaped grooves, and the magnetization direction of the steel is perpendicular to the surface of the steel; the upper end of the neodymium iron boron and the ferrite form a series magnetic circuit, so that the occurrence of demagnetization caused by the influence of an armature can be effectively resisted, and meanwhile, the ferrite with low magnetic energy can be magnetized due to the series connection of magnetic chains; the lower end and the upper end of the neodymium iron boron form a parallel magnetic circuit; v-arrangement groove bottom is equipped with the strengthening rib, through the width of optimizing the strengthening rib, reduces the magnetic leakage and increases mechanical strength. Through two kinds of mixed permanent magnet structures of rational design and all kinds of magnetism-isolating grooves, improve the permanent magnet utilization ratio, improve the torque performance, reduce the magnetic leakage, reduce iron core loss and eddy current loss, improve motor efficiency.
An embodiment of the motor 1 is illustrated in fig. 1-4.
As shown in fig. 1; the rotor structure of the hybrid permanent magnet motor is provided with 6 rectangular grooves vertically along the circumferential direction, and ferrite magnetic steel is embedded in the grooves.
As shown in fig. 2; the lower end of the rectangular groove is communicated with the arched groove, and the upper end of the rectangular groove is communicated with the T-shaped groove; the width of the arch-shaped groove is 1mm, the distance between the upper side arc line of the arch-shaped groove and the arc center of the arch-shaped groove and the distance between the lower side arc line of the arch-shaped groove and the arc center of the arch-shaped groove are 2.5mm and 3.5mm respectively, the width of the ferrite is 2mm, the length of the ferrite is 3.5mm, the width of the 1-shaped part at the lower layer of the T-shaped groove is 1mm, and the width of the one-shaped part at the upper layer of the T-.
As shown in figure 3, a reinforcing rib is arranged at the bottom of the V-shaped groove, neodymium iron boron with the same polarity is embedded in the left groove and the right groove of the V-shaped groove, a trapezoidal groove is arranged on the side of the V-shaped groove close to the reinforcing rib to limit the movement of the neodymium iron boron, the width and the length of the neodymium iron boron are respectively 1mm and 8mm, the width of the reinforcing rib is 1.05mm, the lower side of the trapezoidal groove and the end part of the neodymium iron boron form a α included angle, and the α included angle is 75 degrees
As shown in FIG. 4, the spoke-shaped rectangular ferrite is magnetized tangentially, the neodymium iron boron in the V-shaped groove is magnetized radially, and the spoke-shaped rectangular ferrite and the ferrite form a series magnetic circuit.
An embodiment of the motor 2 is illustrated in fig. 5-8.
As shown in fig. 5; the rotor structure of the hybrid permanent magnet motor is provided with 6 rectangular grooves vertically along the circumferential direction, and ferrite magnetic steel is embedded in the grooves.
As shown in fig. 6; the lower end of the rectangular groove is communicated with the arched groove, and the upper end of the rectangular groove is communicated with the rectangular open groove; the width of the arch-shaped groove is 1mm, the distance between the upper side arc line of the arch-shaped groove and the arc center of the arch-shaped groove and the distance between the lower side arc line of the arch-shaped groove and the arc center of the arch-shaped groove are 2.5mm and 3.5mm respectively, the width of the ferrite is 2mm, the length of the ferrite is 3.5mm, and the width of the rectangular opening groove is 1 mm.
As shown in fig. 7, a reinforcing rib is arranged at the bottom of the V-shaped groove, neodymium iron boron with the same polarity is embedded in the left groove and the right groove of the V-shaped groove, a trapezoidal groove is arranged on the side of the V-shaped groove close to the reinforcing rib to limit the movement of the neodymium iron boron, the width and the length of the neodymium iron boron are respectively 1mm and 8mm, the width of the reinforcing rib is 1.05mm, an included angle α is formed between the lower side of the trapezoidal groove and the end of the neodymium iron boron, an included angle β is formed between a 75-degree chamfer (11) and the end of the neodymium iron boron (8), and an included.
As shown in fig. 8, the spoke-shaped rectangular ferrite is magnetized tangentially, the neodymium iron boron in the V-shaped groove is magnetized radially, and forms a series magnetic circuit with the ferrite.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A rotor structure of a hybrid permanent magnet motor is characterized in that a plurality of rectangular grooves (2) are formed in the rotor in the direction perpendicular to the circumferential direction, the lower ends of the rectangular grooves (2) are communicated with an arch-shaped groove (3), rectangular ferrites (7) are embedded in the communicating grooves, and the magnetization direction of the ferrites (7) is perpendicular to the surface of a permanent magnet in the tangential direction; the upper end of the rectangular groove (2) is communicated with the T-shaped groove (4); v-shaped grooves (5) are formed in the left side and the right side of the T-shaped groove (4); a reinforcing rib (6) is arranged at the other end part of the V-shaped groove (5) opposite to the opening; neodymium iron boron (8) with the same polarity are embedded in the left groove and the right groove of the V-shaped groove (5); a trapezoidal groove (9) is formed in the side, close to the reinforcing rib (6), of the V-shaped groove (5) to limit the movement of the neodymium iron boron (8);
the arch-shaped groove (3) is of an arch bridge-shaped structure and comprises an outer layer circular arc and an inner layer circular arc, the inner layer circular arc and the outer layer circular arc are parallel, and the inner layer circular arc close to the rotating shaft is tangent to the ferrite (7) so as to limit the movement of the ferrite (7).
2. A hybrid permanent magnet machine rotor structure according to claim 1, characterized in that the "one" upper part of the T-shaped slot (4) comprises inner and outer layer arcs, both of which are parallel to the rotor arc; the lower layer 1-shaped part is communicated with the rectangular groove 2, and the width is narrower than that of the rectangular groove 2 so as to limit the movement of the ferrite 7.
3. A hybrid permanent magnet machine rotor structure according to claim 1, characterized in that the opening of the V-shaped groove (5) is directed towards the stator and communicates with the adjacent T-shaped grooves (4) on both sides.
4. The rotor structure of the hybrid permanent magnet motor according to claim 1, wherein the number of the rectangular grooves (2) is 6, and the ratio of the width to the length of the rectangular grooves is 1 (1.5-2).
5. The rotor structure of the hybrid permanent magnet motor according to claim 1, wherein the ratio of the width of the arch-shaped groove (3) to the width of the ferrite (7) is 1 (1.75-2.25), and the ratio of the distance from the upper arc line to the arc center of the arch-shaped groove (3) to the distance from the lower arc line to the arc center of the arch-shaped groove is (1-2): 3.
6. the rotor structure of the hybrid permanent magnet motor according to claim 2, wherein the ratio of the width of the lower layer 1-shaped part of the T-shaped groove (4) to the width of the ferrite (7) is 1 (1.75-2.25), and the ratio of the width of the upper layer 1-shaped part to the width of the upper layer 1-shaped part is 1 (1-1.25): 1.
7. A hybrid permanent magnet machine rotor structure according to claim 1, characterized in that the ratio of the width of the neodymium iron boron (8) to its length is about 1: (7.5-8.5), and the ratio of the width of the reinforcing rib (6) to the width of the neodymium iron boron (8) is (0.75-1.25): 1.
8. A hybrid permanent magnet machine rotor structure according to claim 1 or 7, characterized in that the underside of the trapezoidal groove (9) forms an angle α with the end of the neodymium iron boron (8), the angle α is 60-85 °.
9. A rotor structure of a hybrid permanent magnet motor according to claim 1 or 7, wherein a chamfer (11) at one end of the V-shaped groove (5) near the ferrite (7) forms an angle of β with the end of the NdFeB (8), and the angle of β is 120-150 °.
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| CN201810938901.3A CN109067037B (en) | 2018-08-17 | 2018-08-17 | High-torque-density hybrid permanent magnet motor rotor structure |
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| CN109546772A (en) * | 2018-11-27 | 2019-03-29 | 东南大学 | A kind of novel hybrid permanent magnet type permanent-magnet magnetic resistance synchronous motor rotor structure |
| CN109742881A (en) * | 2019-02-20 | 2019-05-10 | 哈尔滨工业大学 | Tandem type has the adjustable flux electric machine of hybrid permanent magnet of anti-salient pole nature |
| CN110739822B (en) * | 2019-11-08 | 2020-09-15 | 南京航空航天大学 | Parallel magnetic circuit memory motor and operation method |
| CN113364181B (en) * | 2021-06-29 | 2022-08-23 | 广东工业大学 | Reverse salient pole less rare earth permanent magnet synchronous motor rotor and motor thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007151372A (en) * | 2005-11-07 | 2007-06-14 | Asmo Co Ltd | Embedded magnet type motor |
| JP2008193809A (en) * | 2007-02-05 | 2008-08-21 | Asmo Co Ltd | Embedded magnet type motor |
| JP2009131140A (en) * | 2007-11-28 | 2009-06-11 | Asmo Co Ltd | Magnet-embedded motor |
| JP2009153365A (en) * | 2007-11-28 | 2009-07-09 | Asmo Co Ltd | Magnet embedded motor |
| JP2009268338A (en) * | 2007-11-28 | 2009-11-12 | Asmo Co Ltd | Embedded magnet type motor |
| CN103078465A (en) * | 2012-12-31 | 2013-05-01 | 浙江迈雷科技有限公司 | Permanent magnet synchronous motor used for air conditioner compressor |
| CN104104168A (en) * | 2014-07-16 | 2014-10-15 | 东南大学 | Stator and rotor structure of built-in permanent magnet brushless direct current motor |
| CN107968502A (en) * | 2017-12-21 | 2018-04-27 | 珠海格力电器股份有限公司 | Rotor and magneto |
| CN108023421A (en) * | 2017-12-21 | 2018-05-11 | 珠海格力电器股份有限公司 | Rotor and magneto |
-
2018
- 2018-08-17 CN CN201810938901.3A patent/CN109067037B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007151372A (en) * | 2005-11-07 | 2007-06-14 | Asmo Co Ltd | Embedded magnet type motor |
| JP2008193809A (en) * | 2007-02-05 | 2008-08-21 | Asmo Co Ltd | Embedded magnet type motor |
| JP2009131140A (en) * | 2007-11-28 | 2009-06-11 | Asmo Co Ltd | Magnet-embedded motor |
| JP2009153365A (en) * | 2007-11-28 | 2009-07-09 | Asmo Co Ltd | Magnet embedded motor |
| JP2009268338A (en) * | 2007-11-28 | 2009-11-12 | Asmo Co Ltd | Embedded magnet type motor |
| CN103078465A (en) * | 2012-12-31 | 2013-05-01 | 浙江迈雷科技有限公司 | Permanent magnet synchronous motor used for air conditioner compressor |
| CN104104168A (en) * | 2014-07-16 | 2014-10-15 | 东南大学 | Stator and rotor structure of built-in permanent magnet brushless direct current motor |
| CN107968502A (en) * | 2017-12-21 | 2018-04-27 | 珠海格力电器股份有限公司 | Rotor and magneto |
| CN108023421A (en) * | 2017-12-21 | 2018-05-11 | 珠海格力电器股份有限公司 | Rotor and magneto |
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