CN111884376A - Single-phase permanent magnet self-starting motor and electric equipment with same - Google Patents
Single-phase permanent magnet self-starting motor and electric equipment with same Download PDFInfo
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- CN111884376A CN111884376A CN202010774745.9A CN202010774745A CN111884376A CN 111884376 A CN111884376 A CN 111884376A CN 202010774745 A CN202010774745 A CN 202010774745A CN 111884376 A CN111884376 A CN 111884376A
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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
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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
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
-
- 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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- 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
Abstract
The invention provides a single-phase permanent magnet self-starting motor and electric equipment with the same. Single-phase permanent magnet self-starting motor, comprising: a stator portion; the outer edge molded line of the permanent magnet of each magnetic pole of the rotor part comprises at least two arc line sections with unequal lengths, so that the geometric center line of the magnetic pole of the rotor part and the geometric center line of the radial direction of the stator part are arranged with an included angle; the circle centers corresponding to the arc line segments with unequal lengths are different. The motor structure with the structure effectively solves the problem that the motor has a starting dead point. The single-phase motor adopting the structure has the characteristics of small volume, light weight, simple structure, convenience for large-scale manufacture and low manufacturing cost.
Description
Technical Field
The invention relates to the technical field of motor equipment, in particular to a single-phase permanent magnet self-starting motor and electric equipment with the same.
Background
As the demand of single-phase motors in the field of home appliances has increased with the rapid development of permanent magnet motors, people have come to consider the application of permanent magnet materials to single-phase asynchronous motors to improve the comprehensive performance of home appliance products.
The single-phase motor is a single-phase winding, the number of switching devices required for driving the main circuit is small, and the hardware cost of the control system is low. However, the magnetic field in the single-phase motor is a pulse vibration magnetic field, and the electromagnetic torque of the motor exists in the position of 0 point. If a specific structure is not adopted, the stopping position of the motor (the point of the cogging torque is 0) is superposed with the point of the electromagnetic torque is 0, and at the moment, the motor cannot be started no matter any current is applied, so that the problem of starting dead points exists. If the motor has started running, the dead point will be overcome and the motor can still run continuously, depending on the inertia torque of the motor. The stator is generally made into a left-right asymmetric structure to solve the starting problem of the single-phase motor, so that the center line of a magnetic circuit deviates from a dead point position, and the motor adopting the structure has low stability.
Disclosure of Invention
The invention mainly aims to provide a single-phase permanent magnet self-starting motor and electric equipment with the same, and aims to solve the problem that dead spots exist in the motor in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a single-phase permanent magnet self-starting motor including: a stator portion; the outer edge molded line of the permanent magnet of each magnetic pole of the rotor part comprises at least two arc line sections with unequal lengths, so that the geometric center line of the magnetic pole of the rotor part and the geometric center line of the radial direction of the stator part are arranged with an included angle; the circle centers corresponding to the arc line segments with unequal lengths are different.
Further, the rotor portion has a plurality of magnetic poles, and the permanent magnets of the respective magnetic poles are made of a material having the same residual magnetization.
Furthermore, the outer edge molded line of the permanent magnet of each magnetic pole of the rotor part comprises a first molded line and a second molded line, the length of the first molded line is smaller than that of the second molded line, the permanent magnet of each magnetic pole comprises a first permanent magnet composition section and a second permanent magnet composition section, the molded line of the outer peripheral surface of the first permanent magnet composition section is the first molded line, and the molded line of the outer peripheral surface of the second permanent magnet composition section is the second molded line.
Furthermore, the permanent magnet of the rotor part is integrally formed by injection molding.
Further, the first and second profiles are disposed asymmetrically with respect to a pole center line of the rotor portion.
Furthermore, the molded lines of the outer peripheral surfaces of the second permanent magnet component sections on the magnetic poles are all arranged identically, the first permanent magnet component section is of a magnetic shoe-shaped structure, the first permanent magnet component section is attached to the outer peripheral surface of the second permanent magnet component section and covers part of the outer surface of the second permanent magnet component section, the molded lines of the outer peripheral surface of the first permanent magnet component section form first molded lines, and the molded lines of the outer peripheral surface of the other part of the second permanent magnet component section which is not covered by the first permanent magnet component section form second molded lines.
Further, the molded lines of the outer peripheral surfaces of the first permanent magnet constituent segments are all arranged identically.
Further, the permanent magnets on the multiple magnetic poles are arranged in an annular structure along the circumferential direction of the stator part, and the outer edge molded lines of the permanent magnets of the oppositely arranged magnetic poles are arranged symmetrically about the center of a circle of an inner circle of the annular structure.
Further, an extension line of the geometric center line of the first profile in the radial direction of the rotor portion passes through the center of the inner circle of the permanent magnet of the rotor portion, and/or an extension line of the geometric center line of the second profile passes through the center of the inner circle of the permanent magnet of the rotor portion.
Further, the center of the circle of the first molded line is on the molded line of the inner circle of the permanent magnet of the rotor part, and/or the center of the circle of the second molded line is coincident with the center of the circle of the rotor part.
Further, the geometric centre line of the stator part in the radial direction passes through two oppositely arranged stator teeth.
Further, the geometric center line of the magnetic pole of the rotor part is the geometric center line of two oppositely arranged magnetic poles.
According to another aspect of the present invention, there is provided an electromotive device including a single-phase permanent magnet self-starting motor as described above.
By applying the technical scheme of the invention, the outer edge molded line of each magnetic pole of the rotor part comprises at least two arc line sections with unequal lengths, and the circle center positions of the arc line sections with unequal lengths are arranged at different positions, so that the motor winding can ensure that a deflection angle exists between the geometric center line of the magnetic pole on the rotor part and the geometric center line of the stator part under the state of no electricity, the rotor part deflects the dead point position of the motor, when the motor winding is electrified, the motor generates electromagnetic starting torque and becomes main torque due to the arrangement of the deflection of the rotor to the dead point position, and the rotor part continuously rotates under the action of the electromagnetic torque. The motor structure with the structure effectively solves the problem that the motor has a starting dead point. The single-phase motor adopting the structure has the characteristics of small volume, light weight, simple structure, convenience for large-scale manufacture and low manufacturing cost.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural view of a first embodiment of a single-phase permanent-magnet self-starting motor according to the present invention;
fig. 2 shows a schematic structural view of a second embodiment of a single-phase permanent-magnet self-starting motor according to the present invention;
fig. 3 shows a schematic structural view of an embodiment of the rotor portion according to the invention.
Wherein the figures include the following reference numerals:
10. a stator portion; 11. stator teeth;
20. a rotor portion; 21. a first profile; 22. a second profile; 23. a first permanent magnet component section; 24. the second permanent magnet constitutes a segment.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
Referring to fig. 1 to 3, according to an embodiment of the present application, a single-phase permanent magnet self-starting motor is provided.
As shown in fig. 1, the single-phase permanent magnet self-starting motor includes a stator portion 10 and a rotor portion 20. The rotor portion 20 is disposed in the stator portion 10, and the outer edge profile of the permanent magnet of each magnetic pole of the rotor portion 20 includes at least two arc line segments with unequal lengths, so that the geometric center line (shown as B in fig. 1) of the magnetic pole of the rotor portion 20 is disposed at an angle (shown as a in fig. 1) with respect to the geometric center line (shown as a in fig. 1) in the radial direction of the stator portion 10. The circle centers corresponding to the arc line segments with unequal lengths are different.
In this embodiment, the outer edge profile of each magnetic pole of the rotor portion includes at least two arc line segments with unequal lengths, and the circle center positions of the arc line segments with unequal lengths are arranged at different positions, so that the motor winding can be ensured to be in an electroless state, a deflection angle exists between the geometric center line of the magnetic pole on the rotor portion and the geometric center line of the stator portion, the rotor portion is deflected from the dead point position of the motor, when the motor winding is electrified, due to the fact that the rotor is deflected from the dead point position, the motor will generate electromagnetic starting torque and become main torque, and the rotor portion will rotate continuously under the effect of electromagnetic torque. The motor structure with the structure effectively solves the problem that the motor has a starting dead point. The single-phase motor adopting the structure has the characteristics of small volume, light weight, simple structure, convenience for large-scale manufacture and low manufacturing cost.
In the present embodiment, the rotor portion 20 has a plurality of magnetic poles, and the permanent magnets of the respective magnetic poles are made of a material having the same residual magnetization. The arrangement can reduce the processing difficulty of the rotor part.
As shown in fig. 3, the outer edge profile of the permanent magnet of each pole of the rotor portion 20 includes a first profile 21 and a second profile 22. The length of the first molded line 21 is smaller than that of the second molded line 22, the permanent magnet of each magnetic pole comprises a first permanent magnet composition section 23 and a second permanent magnet composition section 24, the molded line of the outer peripheral surface of the first permanent magnet composition section 23 is the first molded line 21, and the molded line of the outer peripheral surface of the second permanent magnet composition section 24 is the second molded line 22. The permanent magnet of the rotor portion 20 is integrally injection molded. The first and second profiles 21, 22 are disposed asymmetrically with respect to the pole center line of the rotor portion 20. The arrangement can ensure that the central line of the magnetic pole and the geometric central line of the stator part are not collinear, and the motor is ensured to have no dead point.
In another embodiment of the present application, the molded lines of the outer peripheral surfaces of the second permanent magnet composition segments 24 on the magnetic poles are all arranged identically, the first permanent magnet composition segment 23 is a magnetic shoe-shaped structure, the first permanent magnet composition segment 23 is attached to the outer peripheral surface of the second permanent magnet composition segment 24 and covers part of the outer surface of the second permanent magnet composition segment 24, the molded line of the outer peripheral surface of the first permanent magnet composition segment 23 forms the first molded line 21, and the molded line of the outer peripheral surface of the second permanent magnet composition segment 24 of another part which is not covered by the first permanent magnet composition segment 23 forms the second molded line 22. The arrangement also enables the motor to play a self-starting role, so that the motor does not have the problem of dead points. In the present embodiment, the molded lines of the outer peripheral surfaces of the first permanent magnet constituent segments 23 may be all provided identically.
Further, the permanent magnets on the plurality of magnetic poles are arranged in an annular structure along the circumferential direction of the stator portion 10, and the outer edge molded lines of the permanent magnets of the oppositely arranged magnetic poles are arranged symmetrically with respect to the center of the circle of the inner circle of the annular structure. An extension line of a geometric center line of the first profile 21 in the radial direction of the rotor portion 20 passes through the center of the inner circle of the permanent magnet of the rotor portion 20, and an extension line of a geometric center line of the second profile 22 passes through the center of the inner circle of the permanent magnet of the rotor portion 20. This arrangement can improve the efficiency of the motor.
Specifically, as shown in fig. 3, the center of the first profile 21 is on the profile of the inner circle of the permanent magnet of the rotor portion 20, and the center of the second profile 22 coincides with the center of the rotor portion 20.
As shown in fig. 1, the radial geometric center line of the stator portion 10 passes through two oppositely disposed stator teeth 11. The geometric center line of the magnetic pole of the rotor portion 20 is the geometric center line of two oppositely disposed magnetic poles. This arrangement can improve the performance of the motor.
The single-phase permanent magnet self-starting motor in the above embodiments may also be used in the technical field of small household appliances, that is, according to another aspect of the present invention, there is provided an electric device, including a single-phase permanent magnet self-starting motor, where the single-phase permanent magnet self-starting motor is the above single-phase permanent magnet self-starting motor.
Specifically, the magnetic field in the single-phase motor is a pulse vibration magnetic field, and the electromagnetic torque of the motor exists in the position of 0 point. If a specific structure is not adopted, the stopping position of the motor (the point of the cogging torque is 0) is superposed with the point of the electromagnetic torque is 0, and at the moment, the motor cannot be started no matter any current is applied, so that the problem of starting dead points exists.
The application provides a permanent magnet structure of rotor, this structure comprises single permanent magnet, and this permanent magnet excircle adopts multistage arc structure. By adopting the permanent magnet with the structure, the point with the cogging torque of 0 and the point with the electromagnetic torque of 0 can be deviated on the premise of not changing the shape of the pole shoe of the stator core, and the self-starting can be realized after the power is on. The permanent magnet can be of an integrally formed magnetic ring structure or of a block surface-mounted magnetic shoe structure.
The single-phase motor sequentially energizes the windings according to the position of the rotor, and the permanent magnet rotor continuously rotates under the action of electromagnetic torque. If the electrifying sequence is changed, the permanent magnet rotor continuously rotates in the opposite direction under the action of the reverse electromagnetic torque. When α is 0, α is pi/2, α is 3 pi/2, and α is pi, the electromagnetic torque is 0 regardless of how the winding is energized, that is, a dead point in operation is formed. If the motor has started running, the dead point will be overcome and the motor can still run continuously, depending on the inertia torque of the motor. In the prior art motor, when the stator winding is in a non-electric state, due to the existence of the salient pole reluctance torque, the center line of the rotor magnetic pole is positioned at the position where α is 0, α is pi/2, α is 3 pi/2, and α is pi. At this time, no electromagnetic torque is applied to the motor, and the motor cannot be started. The motor structure solves the dead point problem of the single-phase brushless direct current motor, and leads the center line of the magnetic pole of the permanent magnet rotor to deviate from the dead point position of alpha which is 0, alpha which is pi/2, alpha which is 3 pi/2 and alpha which is pi when the motor stator winding is in a non-electric state.
In the present application, due to the asymmetric left-right and uneven air gap of the rotor salient pole, the salient pole center line α ═ 0, α ═ pi/2, α ═ 3 pi/2, the air gap reluctance on both sides of α ═ pi is unequal, and the reluctance on the side with the smaller air gap is small, so that the magnetic pole center line is deviated from the position where α ═ 0, α ═ pi/2, α ═ 3 pi/2, and α ═ pi in the non-electric state, and is deviated from the side with the smaller reluctance by an angle α under the action of the reluctance torque. In the non-electric state, the magnetic pole center line of the permanent magnet rotor stops near alpha, once the winding is electrified, the rotor deviates from the dead point position, electromagnetic starting torque is generated and becomes main torque, and the rotor continuously rotates under the action of the electromagnetic torque.
The rotor adopts the multistage arc structure, and every section arc corresponds different centre of a circle and radius, and the back electromotive force that every section arc produced all has the difference, superposes through the back electromotive force that the multistage arc produced, obtains final rotor back electromotive force. The final back electromotive force waveform is adjusted by adjusting the circle center and the radius of each section of arc, so that the odd harmonic of the back electromotive force is reduced, the back electromotive force waveform is more sinusoidal, the motor efficiency is improved, and the noise of the motor is reduced.
As shown in fig. 2, this embodiment is a schematic view of an embodiment in which the magnetic pole center line of the rotor portion coincides with the geometric center line of the stator portion when the winding is electrified.
In the above preferred embodiment, the stator core pole shoe shape can also adopt the solution of the self-starting problem of the common single-phase brushless dc motor, such as uneven air gap, tooth offset, etc., to further improve the self-starting capability of the motor.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A single-phase permanent magnet self-starting motor, comprising:
a stator portion (10);
the rotor part (20) is arranged in the stator part (10), the outer edge molded line of the permanent magnet of each magnetic pole of the rotor part (20) comprises at least two arc line segments with unequal lengths, so that the geometric center line of the magnetic pole of the rotor part (20) and the geometric center line of the radial direction of the stator part (10) are arranged in an included angle mode;
the circle centers corresponding to the arc line segments with unequal lengths are different.
2. The single-phase permanent-magnet self-starting motor according to claim 1, characterized in that the rotor portion (20) has a plurality of magnetic poles, and the permanent magnets of each magnetic pole are made of a material having the same residual magnetization.
3. The single-phase permanent magnet self-starting motor according to claim 1 or 2, wherein the outer edge profile of the permanent magnet of each magnetic pole of the rotor portion (20) comprises a first profile (21) and a second profile (22), the length of the first profile (21) is smaller than the length of the second profile (22), the permanent magnet of each magnetic pole comprises a first permanent magnet composition section (23) and a second permanent magnet composition section (24), the profile of the outer circumferential surface of the first permanent magnet composition section (23) is the first profile (21), and the profile of the outer circumferential surface of the second permanent magnet composition section (24) is the second profile (22).
4. The single-phase permanent-magnet self-starting motor according to claim 3, characterized in that the permanent magnets of the rotor portion (20) are integrally injection molded.
5. A single-phase permanent-magnet self-starting motor according to claim 3, characterized in that the first profile (21) and the second profile (22) are arranged asymmetrically in relation to the pole centre line of the rotor part (20).
6. The single-phase permanent magnet self-starting motor according to claim 3, wherein the profiles of the outer peripheral surfaces of the second permanent magnet constituent segments (24) on the respective magnetic poles are all arranged identically, the first permanent magnet constituent segment (23) has a magnetic shoe-shaped structure, the first permanent magnet constituent segment (23) is attached to the outer peripheral surface of the second permanent magnet constituent segment (24) and covers a portion of the outer surface of the second permanent magnet constituent segment (24), the profile of the outer peripheral surface of the first permanent magnet constituent segment (23) forms the first profile (21), and the profile of the outer peripheral surface of the second permanent magnet constituent segment (24) on the other portion which is not covered by the first permanent magnet constituent segment (23) forms the second profile (22).
7. The single-phase permanent magnet self-starting motor according to claim 6, wherein the profiles of the outer circumferential surfaces of the first permanent magnet constituent segments (23) are all identically arranged.
8. The single-phase permanent-magnet self-starting motor according to any of claims 1, 2, 4 to 7, wherein the permanent magnets on a plurality of magnetic poles are arranged in a ring structure around the circumference of the stator portion (10), and the outer edge profiles of the permanent magnets of the oppositely arranged magnetic poles are arranged centrosymmetrically with respect to the center of the circle of the inner circle of the ring structure.
9. A single-phase permanent-magnet self-starting motor according to claim 3, characterized in that the extension of the geometric centre line of the first profile (21) in the radial direction of the rotor part (20) passes the centre of the inner circle of the permanent magnets of the rotor part (20) and/or the extension of the geometric centre line of the second profile (22) passes the centre of the inner circle of the permanent magnets of the rotor part (20).
10. A single-phase permanent-magnet self-starting motor according to claim 3, characterized in that the centre of the first profile (21) is on the profile of the inner circle of the permanent magnets of the rotor part (20) and/or the centre of the second profile (22) coincides with the centre of the rotor part (20).
11. A single phase permanent magnet self-starting motor according to claim 1, characterized in that the geometric centre line of the stator part (10) in radial direction passes over two oppositely arranged stator teeth (11).
12. The single-phase permanent-magnet self-starting motor according to claim 1, characterized in that the geometric centre line of the poles of the rotor portion (20) is the geometric centre line of two oppositely arranged poles.
13. An electrically powered device comprising a single phase permanent magnet self-starting motor, wherein the single phase permanent magnet self-starting motor is a single phase permanent magnet self-starting motor as claimed in any one of claims 1 to 12.
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| CN202010774745.9A CN111884376B (en) | 2020-08-04 | 2020-08-04 | Single-phase permanent magnet self-starting motor and electric equipment with same |
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| CN202010774745.9A CN111884376B (en) | 2020-08-04 | 2020-08-04 | Single-phase permanent magnet self-starting motor and electric equipment with same |
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| CN111884376B CN111884376B (en) | 2023-05-09 |
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