CN218472863U - Hybrid excitation motor based on stator full-slotting structure - Google Patents

Hybrid excitation motor based on stator full-slotting structure Download PDF

Info

Publication number
CN218472863U
CN218472863U CN202220864655.3U CN202220864655U CN218472863U CN 218472863 U CN218472863 U CN 218472863U CN 202220864655 U CN202220864655 U CN 202220864655U CN 218472863 U CN218472863 U CN 218472863U
Authority
CN
China
Prior art keywords
stator
motor
rotor
permanent magnet
claw pole
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
Application number
CN202220864655.3U
Other languages
Chinese (zh)
Inventor
王宇
陈凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing University of Aeronautics and Astronautics
Original Assignee
Nanjing University of Aeronautics and Astronautics
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nanjing University of Aeronautics and Astronautics filed Critical Nanjing University of Aeronautics and Astronautics
Priority to CN202220864655.3U priority Critical patent/CN218472863U/en
Application granted granted Critical
Publication of CN218472863U publication Critical patent/CN218472863U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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

  • Synchronous Machinery (AREA)

Abstract

The utility model discloses a hybrid excitation motor based on a stator full-slotting structure, which comprises a motor shaft, a motor rotor, a claw pole rotor and a motor stator; a first claw pole rotor, a motor rotor and a second claw pole rotor are sequentially arranged along a motor shaft; the first claw pole rotor and the second claw pole rotor are internally provided with an electric excitation winding; the section of the motor rotor is circular, and a plurality of permanent magnet grooves are uniformly formed along the circumference of the inner ring of the rotor; the strip-shaped permanent magnet is embedded along the permanent magnet slot; wherein the adjacent permanent magnets are arranged in opposite polarity, and each strip permanent magnet is magnetized tangentially along the circumferential direction; the motor stator comprises a plurality of stator teeth and corresponding stator slots; the top of each stator tooth is of a full open slot structure, and the edge of each stator tooth is arc-shaped; the root of each stator tooth is connected with the yoke of the stator; armature windings are arranged in the stator slots; the utility model provides a mixed excitation motor structure can effectively improve motor induced electromotive force, improves motor power density, improves air gap flux density, improves the magnetic load.

Description

Hybrid excitation motor based on stator full-slotting structure
Technical Field
The utility model relates to an excitation motor technical field mainly relates to a mix excitation motor based on stator full open groove structure.
Background
With the rapid development of new energy automobiles and the power generation industry, the traditional permanent magnet synchronous motor is more and more difficult to provide higher torque density and power density for the new energy automobiles and the power generation industry, so that the low-speed direct-drive high-torque, high-efficiency and high-power density motor becomes a new research hotspot.
In order to solve the requirements of low speed, large torque and high power density, the following motor design methods are generally adopted in the prior art:
(1) The pole pair number is increased on the basis of the traditional permanent magnet motor to meet the requirement of low-speed direct drive. The motor in the mode has low torque density and large volume;
(2) The output torque of the device is improved by adopting a mechanical gear speed regulation mode. The mechanical gear structure under the method has the problems of large noise, large volume, lower reliability and easy abrasion;
(3) The split-slot type permanent magnet vernier motor based on the magnetic field modulation effect is adopted and is equivalent to the combination of an ordinary permanent magnet motor and an electromagnetic gear with PR (proportion-to-phase) transformation ratio. But a magnetic field modulation ring is required to be added to realize the magnetic field modulation effect.
When the conventional motor stator slot adopts the pole shoe type semi-closed slot as shown in fig. 2 or the closed slot structure as shown in fig. 3, the flux leakage between the stator teeth is relatively increased as the stator slot is reduced, as shown in fig. 4. Thereby further reducing the amplitude of the air gap flux density harmonic wave, and making the magnetic field modulation effect hard to be reflected. Further reducing the induced electromotive force of the motor and reducing the average torque.
The permanent magnet motor can be divided into a surface-mounted type and a built-in type according to the difference of the space structure of the permanent magnet in the rotor. The surface-mounted permanent magnet is generally tile-shaped and is tightly attached to the outer surface of the rotor core. The surface-mounted permanent magnet motor has equal inductance of a direct axis and a quadrature axis. The permanent magnet of the built-in permanent magnet motor is arranged in the rotor core, and the direct-axis magnetic circuit and the quadrature-axis magnetic circuit of the permanent magnet motor are asymmetric. The performance of the two motors is different, and compared with a surface permanent magnet motor, the built-in permanent magnet motor can fully utilize reluctance torque generated by asymmetry of a rotor magnetic circuit, and the power density of the motor is improved.
Disclosure of Invention
In order to solve the problem that exists among the above-mentioned background art, the utility model provides a hybrid excitation motor based on complete fluting structure of stator, stator tooth portion adopt complete fluting structure, and each permanent magnet magnetizes along circumference tangential, improves motor torque density, improves the induced electromotive force of motor to improve the power density of motor.
The technical scheme is as follows:
a hybrid excitation motor based on a stator full-slotting structure is characterized by comprising a motor shaft, a motor rotor, a claw pole rotor and a motor stator; a first claw pole rotor, a motor rotor and a second claw pole rotor are sequentially arranged along a motor shaft; the first claw pole rotor and the second claw pole rotor are internally provided with an electric excitation winding; the section of the motor rotor is circular, and a plurality of permanent magnet grooves are uniformly formed along the circumference of the inner ring of the rotor; the strip-shaped permanent magnet is embedded along the permanent magnet slot; wherein the adjacent permanent magnets are arranged in opposite polarity, and each strip-shaped permanent magnet is magnetized tangentially along the circumferential direction; the motor stator is sleeved outside the first claw pole rotor, the motor rotor and the second claw pole rotor and comprises a plurality of stator teeth and corresponding stator slots; the top of each stator tooth is of a full-slotted structure, the opening of each stator slot is not shielded, and the edge of each stator tooth is arc-shaped; the root of each stator tooth is connected with the yoke of the stator; air gap reluctance change formed by the stator tooth grooves after slotting in an alternating mode and relative change of permanent magnetic flux modulate a series of rotating space harmonic magnetic fields; an armature winding is arranged in the stator slot; wherein the number of stator slots N s And stator armature winding pole pair number P s Number of pole pairs P of rotor r Satisfies N s ＝P s +P r 。
Furthermore, 16 permanent magnet slots are formed in the motor rotor, the rotor iron core is divided into 16 magnetic poles by the embedded 16 permanent magnets, the polarities of the magnetic poles positioned at 2n-1 are the same, the polarities of the magnetic poles positioned at 2n are the same, n represents the nth rotor pole pair number, and n =1,2, \\ 8230;, 8.
Furthermore, the motor stator is provided with 12 stator slots, armature windings in the stator slots are wound by a consequent pole type winding connection method, and each phase consists of four windings at intervals of 90 degrees, namely four pairs of pole windings.
Further, the speed ω of the stator armature winding field rotation s With the rotational speed omega of the rotor r Satisfies the relationship:
ω s ＝p r /(p r -N s )ω r ＝8/(8-12)ω r ＝-0.5ω r
the minus sign indicates that the two are rotating in opposite directions.
Has the advantages that: the utility model provides a mix excitation motor based on stator full open groove structure not only can improve the torque density of motor, can also realize that the rotor low-speed directly drives and the requirement that stator winding designed according to high-speed magnetic field, compares in traditional PMSM, under the prerequisite that rotor pole pair number is unanimous with the rotational speed, the stator number of teeth is few, and the wire winding is convenient, and the induced electromotive force that also can improve the motor simultaneously is convenient for process, improves the power density of motor. Compared with a split-tooth type stator permanent magnet vernier motor, the split-tooth type stator permanent magnet vernier motor has the advantages that the magnetic adjusting effect of the stator tooth part during full slotting of the stator is utilized, an additional magnetic adjusting block is omitted, meanwhile, the space utilization rate of the stator and the utilization rate of the permanent magnet are improved, and the size of the motor is reduced. The spoke type permanent magnet is adopted for excitation along the tangential direction, so that the air gap flux density can be improved by utilizing the magnetic concentration effect, and the magnetic load is improved. The additional two claw-pole rotors can strengthen the spatial distribution density of the magnetic field, and further improve the power density of the motor.
Drawings
Fig. 1 is a structural cross-sectional view of a hybrid excitation motor based on a stator full open slot structure provided by the invention;
FIG. 2 is a schematic diagram of a semi-closed slot stator structure in the prior art;
FIG. 3 is a schematic view of a prior art closed slot stator configuration;
FIG. 4 is a schematic view of the local flux leakage at the tooth end of the closed slot;
fig. 5 is a schematic cross-sectional view of a motor stator and a motor rotor provided by the present invention;
fig. 6 is an explosion diagram of a hybrid excitation motor structure provided by the present invention;
fig. 7 is a comparison of no-load back electromotive forces output by the motor stator of the present invention under different notches;
FIG. 8 is a non-controlled rectification circuit diagram connected when the motor of the present invention operates as a generator;
fig. 9 shows the voltage comparison of the same load terminal when the motor of the present invention operates as a generator in different stator slots.
Description of reference numerals:
1-stator armature winding; 2-a motor stator; 3-a strip-shaped permanent magnet; 4-a motor rotor; 5-a semi-closed slot stator; 6-closed slot stator; 7-closed slot stator magnetic leakage; 8-motor shaft; 9-a first claw-pole rotor; 10-second claw-pole rotor.
Detailed Description
The following provides a more particular description of the invention, as illustrated in the accompanying drawings.
The utility model provides a mix excitation motor concrete structure based on stator full open groove structure is shown in fig. 1 and fig. 6, and major structure includes motor shaft 8, electric motor rotor 4, claw utmost point rotor and motor stator. The first claw pole rotor 9, the motor rotor 4 and the second claw pole rotor 10 are sequentially and coaxially arranged on a motor shaft 8; the motor stator 2 is sleeved outside the first claw-pole rotor, the motor rotor and the second claw-pole rotor.
The utility model discloses a motor rotor structure as shown in figure 5, the cross-section is the ring form, outwards opens in proper order along the inner circle circumference of rotor has 16 banding permanent magnet grooves. The strip-shaped permanent magnets 3 are embedded along the permanent magnet slots, and each strip-shaped permanent magnet 3 is magnetized tangentially along the circumferential direction. The permanent magnet embedded in the main shaft rotor structure adopts a strip-shaped tangential excitation mode to achieve an obvious magnetic gathering effect and provide reluctance torque for the motor, so that the motor can obtain higher output torque. The embedded 16 permanent magnets divide the rotor core into 16 magnetic poles, wherein the polarities of the magnetic poles at 2n-1 (n =1,2, \ 8230; 8) are the same, the polarities of the magnetic poles at 2n (n =1,2, \ 8230; 8) are the same, and n represents the nth rotor pole pair number; number of pole pairs P of motor rotor in the embodiment r ＝8。
Adopted in the present embodimentThe structure of the motor stator is shown in fig. 5, 12 stator slots are formed in a stator core, and stator teeth and the stator slots are arranged in an alternating manner. Based on the magnetic field modulation principle, the top of the stator tooth is designed to be a full-slotted structure, the stator slot is free of shielding, and the pole shoe structure of the traditional stator is removed. The edge of each stator tooth is arc-shaped, and the root of each stator tooth is connected with the yoke of the stator. Air gap reluctance change formed by the alternative arrangement of the stator tooth grooves after slotting and the relative change of permanent magnetic flux modulate a series of rotating space harmonic magnetic fields; certain torque transmission can be realized by utilizing the coupling of the space harmonic magnetic field. Number of slots N of motor stator in this embodiment s ＝12。
Stator armature windings 1 are wound in the stator slots. The stator armature winding is wound according to four pairs of pole windings, each phase is sequentially connected in series by four groups of windings at intervals of 90 degrees in a consequent manner, namely, a consequent type winding connection method is adopted, for example, A1, A2, A3 and A4 are sequentially connected in a consequent manner to form a phase A, and the other two phases are similarly connected in a consequent manner. The number of pole pairs P of the stator armature winding in the embodiment s ＝4。
Based on the magnetic field modulation effect, the number N of the slots of the stator s And the number of pole pairs P of the stator winding s And the number of pole pairs P of the rotor r Satisfies N s ＝P s +P r The relationship (2) of (c). The embodiment provides a motor structure with 12 slots in a stator, 8 pairs of poles in a rotor and four pairs of poles in a stator armature winding.
In addition, in this embodiment, a first claw-pole rotor 9 and a second claw-pole rotor 10 are coaxially arranged in front of and behind the motor rotor, an electric excitation winding is installed inside the claw-pole rotor, and two additional claw-pole rotors and the main shaft rotor are arranged in parallel to supplement each other, so as to achieve the effect of enhancing the magnetic field intensity, and the whole motor is a hybrid excitation motor.
For the contrast the utility model discloses the motor exports no-load back electromotive force size under different stator notch, keeps the stator armature winding number of turns unchangeable, and it is shown in fig. 7 to change the no-load back electromotive force amplitude of motor that the stator notch shape obtained under the same circumstances, and obviously to see, and the no-load back electromotive force of motor output is the biggest under the full slotted structure of stator, and more is close the sine wave, from this the motor is changeed under the full slotted structure of stator and is obtained higher torque density and power density.
In addition, compare the utility model discloses the motor is taken load end output voltage size after the generator operation under different stator notches, connect the motor three-phase to the output of the uncontrolled rectifier circuit of three-phase, uncontrolled rectifier circuit is as shown in fig. 8; compare load terminal voltage size under external 0.05 omega load, as shown in fig. 9, can see that the load terminal voltage is higher under the full open groove structure of stator, has verified the utility model discloses the advantage place of motor structure.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims (4)

1. A hybrid excitation motor based on a stator full-slotting structure is characterized by comprising a motor shaft, a motor rotor, a claw pole rotor and a motor stator; a first claw pole rotor, a motor rotor and a second claw pole rotor are sequentially arranged along a motor shaft; the first claw pole rotor and the second claw pole rotor are internally provided with an electric excitation winding; the section of the motor rotor is circular, and a plurality of permanent magnet grooves are uniformly formed along the circumference of the inner ring of the rotor; the strip-shaped permanent magnet is embedded along the permanent magnet slot; wherein the adjacent permanent magnets are arranged in opposite polarity, and each strip-shaped permanent magnet is magnetized tangentially along the circumferential direction; the motor stator is sleeved outside the first claw pole rotor, the motor rotor and the second claw pole rotor and comprises a plurality of stator teeth and corresponding stator slots; the top of each stator tooth is of a full-slotted structure, the opening of each stator slot is not shielded, and the edge of each stator tooth is arc-shaped; the root of each stator tooth is connected with the yoke of the stator; air gap reluctance change formed by the stator tooth grooves after slotting in an alternating mode and relative change of permanent magnetic flux modulate a series of rotating space harmonic magnetic fields; an armature winding is arranged in the stator slot; wherein the number of stator slots N s And stator armature winding pole pair number P s Number of pole pairs P of rotor r Satisfies N s ＝P s +P r 。
2. The hybrid excitation motor based on the stator full-slotted structure is characterized in that 16 permanent magnet slots are formed in a motor rotor, 16 embedded permanent magnets divide a rotor iron core into 16 magnetic poles, wherein the polarities of 2n-1 magnetic poles are the same, the polarities of 2n magnetic poles are the same, n represents the nth rotor pole pair number, n =1,2, 8230, 8.
3. The hybrid excitation motor based on the stator full slot structure according to claim 2, wherein the motor stator is provided with 12 stator slots, armature windings in the stator slots are wound by a consequent pole type winding connection method, and each phase is composed of four windings spaced by 90 degrees, namely four pairs of pole windings.
4. The hybrid excitation motor based on the stator full-slot structure as claimed in any one of claims 1 to 3, wherein the speed ω of the rotation of the stator armature winding magnetic field is s With the rotational speed omega of the rotor r Satisfies the relationship:
ω s ＝p r /(p r -N s )ω r ＝8/(8-12)ω r ＝-0.5ω r
the minus sign indicates that the two are rotating in opposite directions.
CN202220864655.3U 2022-04-14 2022-04-14 Hybrid excitation motor based on stator full-slotting structure Active CN218472863U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220864655.3U CN218472863U (en) 2022-04-14 2022-04-14 Hybrid excitation motor based on stator full-slotting structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220864655.3U CN218472863U (en) 2022-04-14 2022-04-14 Hybrid excitation motor based on stator full-slotting structure

Publications (1)

Publication Number Publication Date
CN218472863U true CN218472863U (en) 2023-02-10

Family

ID=85133906

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220864655.3U Active CN218472863U (en) 2022-04-14 2022-04-14 Hybrid excitation motor based on stator full-slotting structure

Country Status (1)

Country Link
CN (1) CN218472863U (en)

Similar Documents

Publication Publication Date Title
CN108011484B (en) Magnetic gear composite motor
CN101699713B (en) Rotor sectional type flux switching motor and method for improving sine degree of back electromotive force thereof
CN109617267B (en) Split-slot type magnetic field modulation permanent magnet motor suitable for hybrid electric vehicle
CN111969822B (en) Mixed excitation multi-phase reluctance motor and power generation system
CN109104014B (en) Four-phase double-winding vernier motor
CN101969257B (en) Hybrid excitation permanent magnet motor with tooth harmonic excitation
CN111146881A (en) Stator and rotor double-armature winding multiple electromagnetic torque single air gap reluctance motor structure
CN103248189A (en) Bipolar stator-surface-mounting type permanent magnet motor
CN112467951A (en) Double-stator alternate-pole brushless hybrid excitation motor
CN201956763U (en) Permanent magnet direct drive motor
CN111277092B (en) Stator modularized double-rotor alternating pole permanent magnet motor
CN103618392B (en) Stator and rotor dual-permanent-magnet excitation harmonic motor
CN111245187B (en) Annular winding dual-rotor flux reversal motor
CN110417215B (en) Axial flux permanent magnet synchronous motor matched with multi-pole slots
Allahyari et al. High power factor dual-rotor Halbach array permanent-magnet Vernier machine
CN202889138U (en) Parallel type composite excitation brushless direct-current motor
CN101951105A (en) Modularized permanent magnet synchronous generator
CN218472863U (en) Hybrid excitation motor based on stator full-slotting structure
Wang et al. Novel DC-saturation-relieving hybrid reluctance machine with skewed permanent magnets for electric vehicle propulsion
Zhang et al. An improved brushless doubly fed generator with interior PM rotor for wind power applications
Wang et al. A new partitioned stator field modulation machine with H-shape permanent magnet excitation
CN115714485A (en) Separated type alternating pole permanent magnet motor based on double magnetic field modulation effect
CN204538925U (en) The hybrid excitation permanent magnet motor of biharmonic excitation
CN115603536A (en) Double-stator hybrid excitation flux reverse motor based on direct current bias
CN211405627U (en) Stator and rotor double-armature winding multiple electromagnetic torque single air gap reluctance motor structure

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant