CN115714485A - Separated type alternating pole permanent magnet motor based on double magnetic field modulation effect - Google Patents
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Abstract
The invention discloses a separated type alternating pole permanent magnet motor based on a double magnetic field modulation effect. The motor is characterized in that the rotor adopts separated alternating pole permanent magnet excitation, wherein, a radial magnetizing surface-mounted permanent magnet based on the initial design of the motor is separated into three permanent magnets along the radial central line and the circumferential central line, an outer permanent magnet with the whole width and two inner permanent magnets with the half width and the like, the two inner permanent magnets rotate towards the inner surface of the rotor by taking the separation point of the circumferential outer side of the permanent magnet as a circular point, and can form a separated permanent magnet structure with the outer permanent magnet, such as an isosceles trapezoid structure, a rectangle structure, a triangle-rectangle combination structure and the like. The permanent magnet structure has high excitation capability under the same permanent magnet consumption, and adjusts the distribution of air gap magnetic fields in the motor, thereby reducing harmonic distortion. The motor disclosed by the invention has the advantages of high power factor, high torque density, high efficiency and the like.
Description
Technical Field
The invention belongs to the field of motor design, and relates to a separated type alternating pole permanent magnet motor based on a double-magnetic field modulation effect.
Background
In the prior art, the development of new energy automobile industry is an important engine in the main direction of automobile industry transformation development, and through the development of the new energy automobile industry, traffic electrification and new energy automobile pure electric drive transformation are promoted; motors play an important role in modern industry; in addition, due to its theoretical zero emission, electric machines are particularly popular in clean energy systems, such as electric vehicles and wind generators, aiming at solving the problems of energy crisis and environmental pollution.
At present, a permanent magnet synchronous motor with high efficiency and high power density can replace a traditional electric excitation motor and is widely researched in various fields; at present, most motor driving systems generally adopt a combination mode of 'a motor + a mechanical reduction gearbox', and high torque output of the whole motor system is realized; however, this method inevitably brings a series of problems such as large volume, low reliability, large friction and noise, etc. In order to solve the problems, a magnetic gear effect is introduced into a permanent magnet synchronous motor to form a magnetic field modulation motor. At present, a magnetic field modulation motor mostly adopts a unilateral permanent magnet excitation structure, and comprises a rotor permanent magnet structure and a stator permanent magnet structure. The rotor permanent magnet motor modulates the space harmonic generated by the excitation of the rotor permanent magnet through a stator side modulation pole, and then interacts with the space harmonic generated by the electrified armature winding to generate electromagnetic torque; the stator permanent magnet motor utilizes magnetic field space harmonic excited by the stator permanent magnet to be modulated by the rotor modulation pole firstly, and then the magnetic field space harmonic interacts with space harmonic generated by the electrified armature magnetic field to generate electromagnetic torque. However, the traditional magnetic field modulation motor adopts single permanent magnet excitation, and the problem of low utilization rate of the internal space of the motor exists.
In order to solve the problem, a motor researcher adopts a permanent magnet motor structure adopting the common excitation of stator and rotor permanent magnets, namely a dual-magnetic field modulation motor. The motor is based on a double-magnetic field modulation effect, the permanent magnet excitation magnetic fields of the stator and the rotor are respectively modulated by the rotor and the stator iron core poles to form bilateral magnetic field modulation, the number and the amplitude of working harmonic waves are increased, and the torque output capacity of the motor is improved.
The invention discloses a separated type alternating pole permanent magnet motor based on a double magnetic field modulation effect, which has the advantages of large output torque, high utilization rate of an internal space, high torque density and high utilization rate of a permanent magnet.
Disclosure of Invention
Aiming at the problems, the invention aims to further improve the torque output capacity of the magnetic field modulation motor, and discloses a separated type alternating pole permanent magnet motor based on a double-magnetic field modulation effect on the basis of exploring the novel rotor permanent magnet array, the double-magnetic field modulation motor and other technologies;
the rotor is excited by adopting a separated type alternate pole permanent magnet, wherein the radial magnetizing surface-mounted permanent magnet based on the initial design of the motor is separated into three permanent magnets along the radial central line and the circumferential central line of the permanent magnet, namely an outer permanent magnet with the whole width and two inner permanent magnets with the same half width, and the rotating angle value of the two inner permanent magnets towards the inner surface of the rotor by taking the circumferential outer separation point of the permanent magnet as a circular point is calculated according to the optimal air gap magnetic field distribution required by the initial design and is less than 90 degrees so as to ensure the magnetic convergence and magnetic field regulation capability and reduce the air gap magnetic field harmonic distortion rate;
the permanent magnetic excitation field on the rotor and the permanent magnetic excitation field on the stator are respectively modulated by the stator teeth and the rotor core and then coupled with the armature winding, and electromechanical energy conversion is carried out in the air gap magnetic field based on the double-magnetic field modulation effect;
the invention has the characteristics of strong permanent magnet excitation capability of the rotor, more working harmonic waves in an air gap magnetic field and high amplitude, and based on the double-magnetic field modulation effect, the motor has the advantages of high output torque, high torque density, high space utilization rate, high efficiency, high power factor, low harmonic distortion rate, low cogging torque, low torque pulsation and the like, and is suitable for occasions requiring high output torque and high efficiency, such as electric vehicles, multi-electric aircraft driving and the like, and has good development prospect.
The technical scheme of the invention is as follows: the invention relates to a separated type alternating pole permanent magnet motor based on a double magnetic field modulation effect, which comprises a rotor and a stator, wherein the rotor is connected with the stator through a magnetic field;
the rotor comprises a rotating shaft, a bearing, a rotor core, a separated permanent magnet and a rotor core pole,
the stator comprises a stator permanent magnet, a stator tooth top, a stator iron core and an armature winding;
the stator adopts a stator alternating pole permanent magnet structure consisting of a stator permanent magnet and a stator tooth top to assist in excitation and adjust the magnetic field distribution in the motor;
the rotor is excited by adopting a separated type alternate pole permanent magnet, wherein a radial magnetizing surface-mounted permanent magnet based on the initial design of a motor is separated into three permanent magnets along the radial central line and the circumferential central line of the surface-mounted permanent magnet, one whole-width outer permanent magnet and two half-width inner permanent magnets, the rotating angle value of the two inner permanent magnets towards the inner surface of the rotor by taking the circumferential outer separation point of the surface-mounted permanent magnet as a circular point is calculated according to the optimal air gap magnetic field distribution required by the initial design and is less than 90 degrees, so that the magnetism gathering and magnetic field regulating capacity is ensured, and the air gap magnetic field harmonic distortion rate is reduced;
the permanent magnetic excitation field (stator permanent magnet) at the stator side and the permanent magnetic excitation field (outer permanent magnet) at the rotor side are respectively modulated by the rotor iron core pole and the stator tooth crest to form bilateral magnetic field modulation, so that the number and the amplitude of working harmonic waves are increased, and the torque output capability of the motor is improved.
The permanent magnets in the two blocks of the rotor rotate towards the inner surface of the rotor by taking a circumferential outer separation point of the surface-mounted permanent magnets as a circular point, the distance from the separation point to the upper surface and the lower surface of the surface-mounted permanent magnets in the radial direction is greater than 1/4 of the height of the permanent magnets, and the distance from the separation point to the circumferential central line of the surface-mounted permanent magnets in the circumferential direction is greater than 1/8 of the width of the permanent magnets.
Furthermore, the rotation angle value of the two inner permanent magnets towards the inner surface of the rotor by taking the circumferential outer separation points of the permanent magnets as round points is calculated according to the optimal air gap magnetic field distribution required by the initial design and is less than 90 degrees, so that the magnetic gathering and magnetic field adjusting capacity is ensured, and the air gap magnetic field harmonic distortion rate is reduced.
Furthermore, the widths of the two inner permanent magnets must be equal, the maximum width value of the two inner permanent magnets is the width of the outer permanent magnet, and the minimum width is 1/8 of the width of the outer permanent magnet.
Furthermore, the separation point is arranged on the circumferential outer side of the surface-mounted permanent magnet, the rotating angle of the inner permanent magnet is less than 90 degrees, and the separation type permanent magnet is of an isosceles trapezoid structure;
the separation point is arranged on the circumferential outer side of the surface-mounted permanent magnet, the rotating angle of the inner permanent magnet is equal to 90 degrees, and the separation type permanent magnet is of a rectangular structure;
the separation point is not positioned at the outer side of the periphery of the permanent magnet, the rotating angle of the inner permanent magnet is less than 90 degrees, and the separation type permanent magnet is of a triangular-rectangular structure.
The stator permanent magnet and the stator tooth top form a stator alternating pole permanent magnet structure to assist excitation and adjust the magnetic field distribution in the motor; the separated permanent magnet and the rotor iron core pole form a rotor alternate pole permanent magnet structure which is used as a main excitation source to establish a main magnetic circuit in the motor;
the permanent magnet excitation field (inner permanent magnet) on the rotor and the permanent magnet excitation field (stator permanent magnet) on the stator are respectively modulated by the stator teeth and the rotor iron core pole and then coupled with the armature winding, and electromechanical energy conversion is carried out in the air gap magnetic field based on the double-magnetic field modulation effect;
due to the two-layer modulation effect, the motor has higher working harmonic amplitude than a traditional single magnetic field modulation motor.
Further, according to the magnetic field modulation theory, when three-phase sine alternating current is injected into the armature winding to generate a pole pair number P a When the space armature magnetic field is adopted, the number of pole pairs of the rotor surface-mounted permanent magnet is P r The number of pole pairs of the stator permanent magnet is P s Number of rotor core poles N r Number of stator core poles N s And satisfies the following relation: p a ＝|P r -P s |，P s ＝N s ，P r ＝N r 。
The invention has the beneficial effects that: the invention is characterized in that: 1. on the basis of a single magnetic field modulation motor, a permanent magnet is applied to a slot of a stator, so that the motor has a compact motor topological structure, and the utilization rate of the internal space of the motor is further improved; 2. the relative motion of the stator alternating pole permanent magnet array and the rotor alternating pole permanent magnet array increases the working harmonic amplitude through the double magnetic field modulation effect, improves the utilization rate of an air gap magnetic field, reduces the leakage magnetic flux, and further improves the torque density; 3. the rotor built-in permanent magnet array forms a main magnetic circuit, the air gap flux density is high, the harmonic distortion is small, and the electromechanical energy conversion rate is high; 4. the stator armature adopts a connection mode of fractional slot concentrated windings, and the motor has the advantages of low loss, high efficiency, short winding end, small cogging torque and the like.
Drawings
FIG. 1 is a schematic diagram of the general structure of the present invention;
FIG. 2 is a schematic diagram of the structure of two separated permanent magnets of the present invention, in which the inner permanent magnet and the outer permanent magnet form an isosceles trapezoid, a rectangle, a triangle-rectangle combination, etc.;
FIG. 3 is a schematic view of the motor with an isosceles trapezoid structure formed by the permanent magnets and the outer permanent magnets;
FIG. 4 is a schematic structural diagram of a motor with a rectangular structure formed by permanent magnets and outer permanent magnets according to the present invention;
FIG. 5 is a schematic structural diagram of a motor with a triangular-rectangular structure formed by permanent magnets and outer permanent magnets according to the present invention;
FIG. 6 is a schematic view of the stator and its magnetization direction in the present invention;
FIG. 7 is a schematic view of a rotor and its magnetization direction in accordance with the present invention;
FIG. 8 is a two-dimensional cross-sectional view of the present invention;
FIG. 9 is a structural view of a rotor hybrid permanent magnet excitation of the present invention;
FIGS. 10-11 are block diagrams of dual field modulated motors having other stator alternating pole configurations in accordance with embodiments of the present invention;
in the figure: 1 is a rotor, 101 is a rotor core, 102 is a separate permanent magnet, 102-1 is an outer permanent magnet, 102-2 is an inner permanent magnet, and 103 is a rotor core pole;
2 is stator, 201 is stator permanent magnet, 202 is stator tooth top, 203 is stator core, 204 is armature winding;
401 is a housing, 402 is a rotating shaft, 403 is a bearing,
601 is a high magnetic energy product permanent magnet and 602 is a low magnetic energy product permanent magnet.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the following detailed description is made with reference to the accompanying drawings:
as shown in the figure, the split type consequent pole permanent magnet motor based on the dual magnetic field modulation effect according to the present invention includes a stator 2, a rotor 1, an armature winding 204, a stator permanent magnet array (a stator permanent magnet 201, a stator tooth top 202, a stator core 203), a rotor outer layer permanent magnet array (an outer permanent magnet 102-1), and a rotor inner layer permanent magnet array (an inner permanent magnet 102-2), wherein a layer of air gap is left between the stator 2 and the rotor 1.
The stator armature (armature winding 204) adopts a connection mode of fractional slot concentrated winding, penetrates through corresponding stator slots, and is electrified with three-phase sine alternating current to generate a rotating armature magnetic field.
Furthermore, the invention adopts a stator alternating pole permanent magnet structure consisting of a stator permanent magnet and a stator tooth top; the rotor 1 is excited by adopting a separated type alternate pole permanent magnet (a separated permanent magnet 102), wherein a radial magnetizing surface-mounted permanent magnet based on the initial design of a motor is separated into three permanent magnets along the radial central line and the circumferential central line of the surface-mounted permanent magnet, an outer permanent magnet 102-1 with the whole width and two inner permanent magnets 102-2 with the same half width and the like, the two inner permanent magnets 102-2 rotate towards the inner surface of the rotor 1 by taking the circumferential outer side separation point of the surface-mounted permanent magnet as a circular point, and can form a separated permanent magnet structure with the outer permanent magnet 102-1 in an isosceles trapezoid, rectangle, triangle-rectangle combination structure and other structures;
the permanent magnets 102-2 in the two blocks are distributed to form an optimized magnetic gathering structure, the excitation direction of the structure is the same as that of the outer permanent magnet 102-1, excitation is improved, and air gap magnetic field distribution is optimized;
the permanent magnet excitation structure has high excitation capacity under the same permanent magnet consumption, and adjusts the distribution of an air gap magnetic field in the motor to reduce harmonic distortion;
the separated permanent magnet 102 and the rotor core pole 103 form a rotor alternating pole permanent magnet structure, and serve as a main excitation source to establish a main magnetic circuit in the motor.
Because the stator 2 and the rotor 1 have the separated permanent magnets 102 arranged alternately on the outer layer, the stator tooth top 202 and the stator permanent magnet 201 form an alternating pole structure, and the outer permanent magnet 102-1 in the separated permanent magnet 102 and the rotor core pole 103 form an alternating pole structure;
when the motor works, the permanent magnetic excitation field (outer permanent magnet 102-1) on the rotor 1 and the permanent magnetic excitation field (stator permanent magnet 201) on the stator are respectively modulated by the stator teeth (stator tooth top 202) and the rotor iron core pole 103 to generate a double magnetic field modulation effect, namely the permanent magnetic excitation field (outer permanent magnet 102-1) of the rotor is modulated by the stator tooth top 202,
the stator permanent magnetic excitation magnetic field (stator permanent magnet 201) is modulated by the rotor core pole 103 to generate a bidirectional modulation effect, an effective harmonic component with a certain pole pair number and a rotating speed is formed in an air gap, and the harmonic component is effectively coupled with an armature winding, so that electromechanical energy conversion is realized.
The number of the stator tooth tops 202 is recorded as N s The number of rotor core poles 103 is N r The number of pole pairs of the stator permanent magnet 201 is P s The number of pole pairs of the rotor surface-mounted permanent magnet (outer permanent magnet 102-1) is P r Three-phase sinusoidal alternating current is fed to the stator d-armature winding 204 to generate a pole pair number P a Each of the space armature magnetic fields of (1) satisfies the following relational expression: p is a ＝|P r -P s |，P s ＝N s ，P r ＝N r 。
The invention has the advantages of high output torque, high torque density, high space utilization rate, high efficiency, high power factor, low harmonic distortion rate, low cogging torque, low torque ripple and the like, and is suitable for occasions requiring high output torque and high efficiency, such as electric vehicles, multi-electric aircraft driving and the like, and has good development prospect.
Example 1
As shown in fig. 1 and 2, the present invention discloses a split type alternating pole permanent magnet motor based on a dual magnetic field modulation effect, which comprises a stator 2, a rotor 1, an armature winding 204, a stator permanent magnet array (a stator permanent magnet 201, a stator tooth top 202, a stator core 203), a rotor outer layer permanent magnet array (an outer permanent magnet 102-1), and a rotor inner layer permanent magnet array (an inner permanent magnet 102-2), wherein a layer of air gap is left between the stator 2 and the rotor 1. Stator teeth are uniformly distributed in the stator iron core 203 along the circumference, and a stator permanent magnet 201 is applied between two adjacent stator tooth tops 202; the separated permanent magnet 102-1 and the iron core pole 103 form a rotor alternating pole permanent magnet structure, the stator permanent magnet 201 and the stator tooth crest 202 form a stator alternating pole permanent magnet structure, and the armature winding 204 is embedded in radial equidirectional stator slots; permanent magnets 102-1 which are magnetized in the radial direction and are arranged alternately and two inner permanent magnets 102-2 with half width and the like are uniformly adhered to the outer surface of the rotor 1 along the circumference, and a surface-mounted permanent magnet circumferential outer separation point is taken as a circular point to rotate towards the inner surface of the rotor 1 to form a rotor inner permanent magnet array (the inner permanent magnets 102-2);
the rotating shaft 402, the rotor 1, the rotor permanent magnet 102 and the rotor iron core pole 103 are coaxially sleeved.
Specifically, as shown in fig. 1, the present invention includes a rotor 1 and a stator 2, wherein the rotor 1 includes a rotating shaft 402, a bearing 403, a separated permanent magnet 102, a rotor core pole 103;
the separated permanent magnet 102 of the rotor 1 is an isosceles trapezoid permanent magnet excitation structure formed by separating a surface-mounted permanent magnet into three permanent magnets, wherein an outer permanent magnet 102-1 with the whole width and a rotor iron core pole 103 are alternately arranged to form an outer permanent magnet array of the rotor; two inner permanent magnets 102-2 with half width and the same height rotate to the inner surface of the rotor by taking a circumferential outer separation point of the surface-mounted permanent magnet as a circular point to form a rotor inner permanent magnet array; the permanent magnetic excitation field on the rotor and the permanent magnetic excitation field on the stator are respectively modulated by the stator teeth and the rotor core 101 and then coupled with the armature winding 204, and electromechanical energy conversion is carried out in the air gap magnetic field based on a double-magnetic field modulation effect; only a single layer of air gap between the stator 2 and the rotor 1 is involved, with a compact motor topology.
As shown in fig. 6, the stator permanent magnet 201 and the stator tooth top 202 form a stator alternating pole permanent magnet structure to assist excitation and adjust magnetic field distribution in the motor;
the rotor 1 is excited by adopting separated alternating-pole permanent magnet, the permanent magnet structure has high excitation capacity under the same permanent magnet consumption, and the distribution of an air gap magnetic field in the motor is adjusted to reduce harmonic distortion;
the stator permanent magnet and the rotor permanent magnet can be excited by mixed permanent magnets, the rotor permanent magnet is replaced by a permanent magnet with higher remanence, and the stator permanent magnet is replaced by a permanent magnet with lower remanence, so that a mixed permanent magnet excitation structure is formed, the manufacturing cost of the motor is reduced, and the rotor is prevented from generating magnetic saturation during high-speed operation.
As shown in fig. 7, the rotor 1 is excited by adopting a separated type alternate pole permanent magnet, wherein a radial magnetizing surface-mounted permanent magnet based on the initial design of the motor is separated into three permanent magnets along the radial central line and the circumferential central line, one whole-width outer permanent magnet 102-1 and two half-width inner permanent magnets 102-2, the two inner permanent magnets 102-2 rotate towards the inner surface of the rotor by taking the circumferential outer separation point of the permanent magnet as a circular point, and form a separated type permanent magnet 102 structure with an isosceles trapezoid structure with the outer permanent magnet 102-1, the permanent magnet structure has high excitation capability under the same permanent magnet consumption, air gap magnetic field distribution in the motor is optimized, and harmonic distortion is reduced.
As shown in fig. 9, the rotor 1 is excited by using a separated alternating-pole permanent magnet, the radial magnetizing surface-mounted permanent magnet based on the initial design of the motor is separated into three permanent magnets along the radial center line and the circumferential center line, one outer permanent magnet 102-1 with the whole width and two inner permanent magnets 102-2 with the half width and the like, the two inner permanent magnets 102-2 rotate towards the inner surface of the rotor 1 by taking the separation point of the circumferential outer side of the permanent magnet as a circular point, and form a separated permanent magnet structure with an isosceles trapezoid structure with the outer permanent magnet 102-1, wherein the two inner permanent magnets 102-2 can be replaced by a permanent magnet with a low magnetic energy product with a lower value of remanence than that of the outer permanent magnet 102-1, so as to form a mixed permanent magnet excitation structure and reduce the harmonic distortion of an air gap magnetic field.
As shown in fig. 10 and 11, the alternating pole permanent magnet structure formed by the stator permanent magnet 201 and the stator tooth crest 202 disclosed by the present invention can be further developed into other two structures: each stator permanent magnet 201 and the adjacent stator tooth top 202 form an alternating pole structure, so that the using amount of the permanent magnets can be greatly saved, and the stator tooth top 202 can also be used as a modulation pole to adjust an air gap magnetic field; each stator tooth top 202 is provided with a plurality of sub-teeth, and the stator permanent magnet 201 and the adjacent stator tooth top 202 form an alternating pole structure.
Finally, it should be understood that the embodiments described herein are merely illustrative of the principles of embodiments of the present invention; other variations are also possible within the scope of the invention; thus, by way of example, and not limitation, alternative configurations of embodiments of the invention may be considered consistent with the teachings of the invention; accordingly, the embodiments of the invention are not limited to the embodiments explicitly described and depicted.
Claims (9)
1. A separated type alternating pole permanent magnet motor based on double magnetic field modulation effect is characterized in that,
comprises a rotor (1) and a stator (2);
the rotor (1) comprises a rotor iron core (101) and a plurality of separated permanent magnets (102) arranged on the rotor iron core (101);
the stator (2) comprises a stator permanent magnet (201), a stator tooth top (202), a stator iron core (203) and an armature winding (204);
the separated permanent magnet (102) is formed by separating a radially magnetized surface-mounted permanent magnet into three permanent magnets along the radial center line and the circumferential center line of the surface-mounted permanent magnet, namely an outer permanent magnet (102-1) with the whole width and two inner permanent magnets (102-2) with the same half width and the same height;
the two inner permanent magnets (102-2) rotate towards the inner surface of the rotor (1) by taking a circumferential outer separation point of the surface-mounted permanent magnet as a circular point, and the rotated inner permanent magnet (102-2) and the outer permanent magnet (102-1) can form a separated permanent magnet structure with an isosceles trapezoid structure, a rectangular structure, a triangular-rectangular combination structure and other structures;
the two inner permanent magnets (102-2) are arranged to form an optimized magnetic gathering structure, and the excitation direction of the structure is the same as that of the outer permanent magnet (102-1).
2. The separated type alternate pole permanent magnet motor based on the dual magnetic field modulation effect according to claim 1,
the rotation angle of the two inner permanent magnets (102-2) towards the inner surface of the rotor (1) is smaller than 90 degrees by taking the circumferential outer separation point of the surface-mounted permanent magnets as a dot.
3. The separated type alternating pole permanent magnet motor based on the dual magnetic field modulation effect according to claim 1,
the distance between the separation point and the upper surface and the lower surface of the surface-mounted permanent magnet in the radial direction is more than 1/4 of the height of the surface-mounted permanent magnet, and the distance between the separation point and the circumferential center line of the surface-mounted permanent magnet in the circumferential direction is more than 1/8 of the width of the surface-mounted permanent magnet;
when the separation point is positioned at the circumferential outer side of the surface-mounted permanent magnet and the rotating angle of the inner permanent magnet (102-2) is less than 90 degrees, the separation type permanent magnet (102) is in an isosceles trapezoid structure;
when the separation point is positioned at the circumferential outer side of the surface-mounted permanent magnet and the rotating angle of the inner permanent magnet (102-2) is equal to 90 degrees, the separation type permanent magnet (102) is in a rectangular structure;
when the separation point is not positioned at the circumferential outer side of the surface-mounted permanent magnet and the rotating angle of the inner permanent magnet (102-2) is less than 90 degrees, the separation type permanent magnet (102) is in a triangular-rectangular structure.
4. The separated type alternating pole permanent magnet motor based on the dual magnetic field modulation effect according to claim 1,
the widths of the two inner permanent magnets (102-2) are equal, the maximum width value of the two inner permanent magnets is the width of the outer permanent magnet (102-1), and the minimum width value of the two inner permanent magnets is 1/8 of the width of the outer permanent magnet (102-1).
5. The separated type alternating pole permanent magnet motor based on the dual magnetic field modulation effect according to claim 1,
a rotor core pole (103) is connected between the outer permanent magnet (102-1) of the two adjacent separated permanent magnets (102) and between the inner permanent magnet (102-2) and the other spaced inner permanent magnet (102-2).
6. The separated type alternating pole permanent magnet motor based on the dual magnetic field modulation effect according to claim 1,
the inner permanent magnet (102-2) is replaced by a permanent magnet (602) with a low magnetic energy product and a lower remanence value than the outer permanent magnet (102-1), so that a hybrid permanent magnet excitation structure is formed;
the outer permanent magnet (102-1) is replaced by a high-magnetic energy product permanent magnet (601) with a higher remanence value than that of the inner permanent magnet (102-2), so that a hybrid permanent magnet excitation structure is formed.
7. The separated type alternate pole permanent magnet motor based on the dual magnetic field modulation effect according to claim 1,
stator permanent magnets (201) are arranged between two adjacent stator tooth tops (202), and the stator tooth tops (202) and the stator permanent magnets (201) are alternately arranged to form an alternating pole structure;
and armature windings (204) are arranged on the other sides of the stator permanent magnets (201).
8. The separated type alternate pole permanent magnet motor based on the dual magnetic field modulation effect according to claim 1,
a shell (401) is arranged outside the stator (2), a rotating shaft hole is formed in the shell (401), a rotating shaft (402) is arranged in the rotating shaft hole, and the rotating shaft (402) penetrates through the rotating shaft hole and then is arranged on the rotor (1).
9. The separated type alternating pole permanent magnet motor based on the dual magnetic field modulation effect according to claim 8,
a bearing (403) is installed in the rotating shaft hole and outside the rotating shaft (402).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211472919.1A CN115714485A (en) | 2022-11-17 | 2022-11-17 | Separated type alternating pole permanent magnet motor based on double magnetic field modulation effect |
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| CN202211472919.1A CN115714485A (en) | 2022-11-17 | 2022-11-17 | Separated type alternating pole permanent magnet motor based on double magnetic field modulation effect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115891500A (en) * | 2023-03-09 | 2023-04-04 | 西南交通大学 | Magnetic wheel structure of magnetic suspension automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115891500A (en) * | 2023-03-09 | 2023-04-04 | 西南交通大学 | Magnetic wheel structure of magnetic suspension automobile |
| CN115891500B (en) * | 2023-03-09 | 2023-05-12 | 西南交通大学 | Magnetic wheel structure of magnetic suspension automobile |
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