CN110994833A - Auxiliary magnetic leakage type memory motor with series magnetic circuits - Google Patents
Auxiliary magnetic leakage type memory motor with series magnetic circuits Download PDFInfo
- Publication number
- CN110994833A CN110994833A CN201911163253.XA CN201911163253A CN110994833A CN 110994833 A CN110994833 A CN 110994833A CN 201911163253 A CN201911163253 A CN 201911163253A CN 110994833 A CN110994833 A CN 110994833A
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- permanent magnet
- rotor
- permanent
- permanent magnets
- mixed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
- H02K21/021—Means for mechanical adjustment of the excitation flux
- H02K21/022—Means for mechanical adjustment of the excitation flux by modifying the relative position between field and armature, e.g. between rotor and stator
- H02K21/025—Means for mechanical adjustment of the excitation flux by modifying the relative position between field and armature, e.g. between rotor and stator by varying the thickness of the air gap between field and armature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation
Abstract
The invention discloses an auxiliary magnetic leakage type series magnetic circuit memory motor which comprises a stator, an armature winding, a mixed permanent magnet rotor and a rotating shaft, wherein the mixed permanent magnet rotor surrounds the outer side of the rotating shaft, the stator surrounds the outer side of the mixed permanent magnet rotor, the armature winding is arranged on the stator, each pole on a rotor iron core of the mixed permanent magnet rotor is provided with two tangentially magnetized second permanent magnets and a radially magnetized second permanent magnet, the two first permanent magnets form a V-shaped permanent magnet structure, the bottom of the V-shaped permanent magnet structure is close to the rotating shaft, an auxiliary magnetic leakage magnetic circuit is reserved between the V-shaped permanent magnet structure and the rotating shaft, the second permanent magnet is in a straight shape and is placed on the side, close to an air gap, of a rotor iron core, one end of the second permanent magnet is close to the opening of the V-shaped permanent magnet structure of the current pole. The magnetic field regulating device has a simple topological structure and high mechanical strength, and can effectively solve the problems that the magnetic field regulating range of the memory motor with the series magnetic circuit structure is too narrow and the required magnetic field regulating current is too high.
Description
Technical Field
The invention relates to a permanent magnet memory motor, in particular to an auxiliary magnetic leakage type memory motor with a series magnetic circuit.
Background
Because the Permanent Magnet Synchronous Motor (PMSM) adopts the traditional rare earth Permanent Magnet material (such as neodymium iron boron) with higher magnetic energy product, the PMSM has the advantages of high power density, high efficiency, reliable operation, strong overload capacity and the like, and is an important development direction of motor disciplines. Because of the inherent characteristics of common permanent magnet materials (such as neodymium iron boron), the air gap field in the motor of the traditional permanent magnet synchronous motor is basically kept constant, the speed regulation range is very limited when the motor is operated electrically, and the application of the traditional permanent magnet synchronous motor in wide speed regulation direct drive occasions such as electric automobiles, aerospace and the like is limited to a certain extent, so that the flux-adjustable permanent magnet motor which aims at realizing the effective regulation of the air gap field of the permanent magnet motor is always a hotspot and a difficulty in the field of motor research. The permanent magnet memory motor (hereinafter referred to as 'memory motor') is a novel magnetic flux controllable permanent magnet motor, and adopts a low-coercive-force alnico permanent magnet, and a circumferential magnetic field is generated through a stator winding or a direct-current pulse winding, so that the magnetization intensity of the permanent magnet is changed, and an air gap magnetic field is adjusted, and meanwhile, the permanent magnet has the characteristic that the magnetic density level can be memorized.
The traditional memory motor with a topological structure is developed from a write pole motor, and a rotor of the memory motor is of a sandwich structure formed by an alnico permanent magnet, a nonmagnetic interlayer and a rotor iron core. The special structure can realize the on-line repeated irreversible charging and de-magnetizing of the permanent magnet at any time, and simultaneously reduces the influence of quadrature axis armature reaction on an air gap magnetic field. Most of the existing research focuses on an alternating current magnetic regulation type hybrid permanent magnet memory motor, namely, neodymium iron boron and aluminum nickel cobalt permanent magnets are jointly arranged on a rotor, and a stator winding has two functions of power control and magnetic regulation.
The prior art CN108599418A provides a rotor core of a magnetic circuit series type hybrid permanent magnet controllable flux motor and a motor, the motor adopts a series magnetic circuit structure, the magnetizing effect of a low-coercivity permanent magnet can be enhanced, and the working point of the permanent magnet is improved. However, in the structure, the magnetizing magnetomotive force needs to pass through two permanent magnets, the required full magnetizing current and the capacity of the inverter are increased, and meanwhile, the field adjusting range of the motor is narrow due to the forward action of the neodymium iron boron permanent magnet on the alnico permanent magnet.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides an auxiliary magnetic leakage type memory motor with a series magnetic circuit, aiming at the problems in the prior art, and solving the problems of over-narrow magnetic regulation range, over-high required magnetic regulation current and the like in the series magnetic circuit type memory motor in the traditional structure.
The technical scheme is as follows: the invention relates to an auxiliary magnetic leakage type series magnetic circuit memory motor which comprises a stator, an armature winding, a mixed permanent magnet rotor and a rotating shaft, wherein the mixed permanent magnet rotor surrounds the outer side of the rotating shaft, the stator surrounds the outer side of the mixed permanent magnet rotor, the armature winding is arranged on the stator, each pole on a rotor iron core of the mixed permanent magnet rotor is provided with two tangentially magnetized first permanent magnets and a radially magnetized second permanent magnet, the two first permanent magnets form a V-shaped permanent magnet structure, the bottom of the V-shaped permanent magnet structure is close to the rotating shaft, an auxiliary magnetic leakage magnetic circuit is reserved between the V-shaped permanent magnet structure and the rotating shaft, the second permanent magnet is in a straight shape and is placed on the side, close to an air gap, of a rotor iron core, one end of the second permanent magnet is close to the opening of the V-shaped permanent magnet structure of the.
Furthermore, the V-shaped permanent magnet structure is symmetrical about the radial direction, and the included angle is not more than 90 degrees.
Furthermore, the difference angle of the magnetizing directions of the two first permanent magnets of the same pole is consistent with the included angle of the V-shaped permanent magnet structure, the two first permanent magnets of the same pole and the second permanent magnet form a series magnetic circuit, the magnetizing directions of the second permanent magnets of adjacent poles are opposite, and the magnetizing directions of the first permanent magnets close to the two ends of the second permanent magnet are opposite.
Furthermore, the number of the second permanent magnets is even, and the number of the first permanent magnets is twice that of the second permanent magnets.
Further, the first permanent magnet is a neodymium iron boron permanent magnet, and the second permanent magnet is an alnico permanent magnet.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages:
1. according to the invention, the auxiliary magnetic leakage magnetic circuit is arranged between the V-shaped permanent magnet bottom and the rotating shaft, so that most of a permanent magnet magnetic field is short-circuited in the rotor under the condition of weak magnetism of the motor, and the magnetic regulation range of the motor is improved;
2. the auxiliary magnetic leakage magnetic circuit is arranged on the straight-axis path, so that the straight-axis path is provided for the magnetic regulation magnetomotive force, and the magnetic regulation current is reduced;
3. according to the invention, the V-shaped permanent magnet structure formed by the first permanent magnet and the second permanent magnet are spatially layered, so that the risk of accidental demagnetization of the first permanent magnet by the magnetic regulating current is reduced;
4. compared with other series magnetic circuit improved memory motors, the invention has the advantages of simple rotor structure and high mechanical strength.
Drawings
FIG. 1 is a cross-sectional view of an electric machine of the present invention;
FIG. 2 is a magnetic flux distribution plot of a second permanent magnet of the motor of the present invention when magnetized in the forward direction;
fig. 3 is a magnetic force line distribution diagram when the second permanent magnet of the motor of the present invention is magnetized in the reverse direction.
Detailed Description
The embodiment provides an auxiliary leakage flux type series magnetic circuit memory motor, as shown in fig. 1, comprising a stator 1, an armature winding 2, a hybrid permanent magnet rotor 3 and a rotating shaft 4. The rotating shaft 4, the mixed permanent magnet rotor 3 and the stator 1 are arranged in sequence from inside to outside. The stator 1 comprises stator core teeth 1.1 and stator yokes 1.2, the stator core teeth 1.1 are arranged between the stator yokes 1.2 and the hybrid permanent magnet rotor 3, cavities 1.3 are formed between adjacent stator core teeth 1.1 and used for placing three-phase armature windings 2 wound on the stator core teeth 1.1, and the hybrid permanent magnet rotor 3 is arranged around the outer portion of a rotating shaft 4. Each utmost point of rotor core is provided with two first permanent magnets 3.1 that the tangential magnetizes and a second permanent magnet 3.2 that radially magnetizes, V style of calligraphy permanent magnet structure 3.3 is constituteed to two adjacent first permanent magnets 3.1, V style of calligraphy permanent magnet structure 3.3 bottom is close to pivot 4, and leave supplementary magnetic leakage magnetic circuit 3.4 with pivot 4 within a definite time, second permanent magnet 3.1 is a style of calligraphy, place and lean on the air gap side at the rotor core, one end is close to the opening part of this utmost point's V style of calligraphy permanent magnet structure, the other end is close to the V style of calligraphy permanent magnet structure opening part of adjacent utmost point. V-shaped permanent magnet structure 3.3 is about radial symmetry, and V-shaped permanent magnet structure 3.3 contained angle is no longer than 90 degrees. The magnetizing directions of the two first permanent magnets 3.1 under the same pole are tangential, the difference angle of the magnetizing directions is consistent with the size of the included angle of the V-shaped permanent magnet structure 3.3, the first permanent magnets 3.1 and the second permanent magnets 3.2 under the same pole form a series magnetic circuit, the magnetizing directions of the second permanent magnets 3.2 of adjacent poles are opposite, and the magnetizing directions of the first permanent magnets 3.1 at the two ends of the second permanent magnets 3.2 are opposite. In this embodiment, the first permanent magnets 3.1 are eight in number and the second permanent magnets 3.2 are four in number. The first permanent magnet 3.1 is a neodymium iron boron permanent magnet, and the second permanent magnet 3.2 is an aluminum nickel cobalt permanent magnet.
With reference to fig. 2 and 3, the operation principle of the auxiliary leakage flux type series magnetic circuit memory motor of the present embodiment is as follows: the permanent magnetic flux starts from the north pole of the first permanent magnet 3.1 arranged tangentially on the rotor core along the circumference, passes through the other first permanent magnet 3.1 in the V-shaped permanent magnet structure 3.3, and a part of the permanent magnetic flux returns to the south pole of the original first permanent magnet 3.1 directly and a part of the permanent magnetic flux reaches the south pole of the second permanent magnet 3.2. If the second permanent magnet 3.2 is magnetized along the magnetic flux direction of the first permanent magnet 3.1 along the circumferential radial direction, the second permanent magnet 3.2 is in a magnetizing state, the two types of permanent magnet magnetic fluxes flow in the same direction after being superposed, pass through an air gap, reach the stator core teeth 1.1, pass through the stator yoke 1.2, pass through the second permanent magnet 3.2 in the same path and return to the south pole of the first permanent magnet 3.1; if the second permanent magnet 3.2 is magnetized in the circumferential radial direction against the magnetic flux direction of the first permanent magnet 3.1, the second permanent magnet 3.2 is in a field weakening state, most of the permanent magnetic flux is short-circuited, and a small part returns to the south pole of the first permanent magnet 3.1 according to the path. The magnetic field lines of the second permanent magnet 3.2 in the two magnetization states are distributed as shown in fig. 2 and 3. Meanwhile, three-phase alternating current with the same rotating speed as the mixed permanent magnet rotor 3 is introduced into the motor armature winding 2, and the rotating magnetic fields formed by the stator and the rotor interact with each other, so that electromechanical energy conversion is realized. The designed auxiliary leakage magnetic circuit 3.4 can widen the magnetic adjusting range of the motor and effectively reduce the required magnetic adjusting current.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (5)
1. The utility model provides an auxiliary leakage formula series magnetic circuit memory motor, includes stator, armature winding, mixed permanent magnet rotor and pivot, mixed permanent magnet rotor centers on the pivot outside, the stator centers on the mixed permanent magnet rotor outside, armature winding sets up on the stator, its characterized in that: each utmost point is provided with the first permanent magnet of two tangential magnetizations and the second permanent magnet of a radial magnetization on the rotor iron core of mixed permanent magnet rotor, and V style of calligraphy permanent magnet structure is constituteed to two first permanent magnets, V style of calligraphy permanent magnet structure bottom is close to the pivot, and leaves supplementary magnetic leakage magnetic circuit between the pivot, the second permanent magnet is a style of calligraphy, places and leans on the air gap side at the rotor iron core, and one end is close to the opening part of this utmost point V style of calligraphy permanent magnet structure, and the other end is close to the V style of calligraphy permanent magnet structure opening part of adjacent utmost point.
2. The auxiliary leakage flux type memory motor of claim 1, wherein: the V-shaped permanent magnet structure is symmetrical in the radial direction, and the included angle is not more than 90 degrees.
3. The auxiliary leakage flux type memory motor of claim 1, wherein: the difference angle of the magnetizing directions of the two first permanent magnets of the same pole is consistent with the included angle of the V-shaped permanent magnet structure, the two first permanent magnets of the same pole and the second permanent magnet form a series magnetic circuit, the magnetizing directions of the second permanent magnets of adjacent poles are opposite, and the magnetizing directions of the first permanent magnets close to the two ends of the second permanent magnet are opposite.
4. The auxiliary leakage flux type memory motor of claim 1, wherein: the number of the second permanent magnets is even, and the number of the first permanent magnets is twice that of the second permanent magnets.
5. The auxiliary leakage flux type memory motor of claim 1, wherein: the first permanent magnet is a neodymium iron boron permanent magnet, and the second permanent magnet is an aluminum nickel cobalt permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911163253.XA CN110994833A (en) | 2019-11-25 | 2019-11-25 | Auxiliary magnetic leakage type memory motor with series magnetic circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911163253.XA CN110994833A (en) | 2019-11-25 | 2019-11-25 | Auxiliary magnetic leakage type memory motor with series magnetic circuits |
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| Publication Number | Publication Date |
|---|---|
| CN110994833A true CN110994833A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911163253.XA Pending CN110994833A (en) | 2019-11-25 | 2019-11-25 | Auxiliary magnetic leakage type memory motor with series magnetic circuits |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112072811A (en) * | 2020-08-03 | 2020-12-11 | 东南大学 | Embedded-permanent magnet reluctance type mixed magnetic pole type memory motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012029563A (en) * | 2005-03-01 | 2012-02-09 | Toshiba Corp | Permanent magnet type rotary electric machine |
| CN109802541A (en) * | 2019-02-20 | 2019-05-24 | 哈尔滨工业大学 | The double V-shaped adjustable magnetic flux memory motor of hybrid permanent magnet |
| CN109936230A (en) * | 2019-03-28 | 2019-06-25 | 东南大学 | A kind of series circuit type two-layer hybrid permanent magnetism memory electrical machine |
-
2019
- 2019-11-25 CN CN201911163253.XA patent/CN110994833A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012029563A (en) * | 2005-03-01 | 2012-02-09 | Toshiba Corp | Permanent magnet type rotary electric machine |
| CN109802541A (en) * | 2019-02-20 | 2019-05-24 | 哈尔滨工业大学 | The double V-shaped adjustable magnetic flux memory motor of hybrid permanent magnet |
| CN109936230A (en) * | 2019-03-28 | 2019-06-25 | 东南大学 | A kind of series circuit type two-layer hybrid permanent magnetism memory electrical machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112072811A (en) * | 2020-08-03 | 2020-12-11 | 东南大学 | Embedded-permanent magnet reluctance type mixed magnetic pole type memory motor |
| CN112072811B (en) * | 2020-08-03 | 2022-03-08 | 东南大学 | Embedded-permanent magnet reluctance type mixed magnetic pole type memory motor |
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Application publication date: 20200410 |
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