CN117394630A - Bilateral permanent magnet motor with various stator teeth and design method thereof - Google Patents
Bilateral permanent magnet motor with various stator teeth and design method thereof Download PDFInfo
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- CN117394630A CN117394630A CN202311433785.7A CN202311433785A CN117394630A CN 117394630 A CN117394630 A CN 117394630A CN 202311433785 A CN202311433785 A CN 202311433785A CN 117394630 A CN117394630 A CN 117394630A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000013461 design Methods 0.000 title claims abstract description 13
- 230000002146 bilateral effect Effects 0.000 title claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 97
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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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
- H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- 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
-
- 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
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
-
- 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
Abstract
The invention provides a bilateral permanent magnet motor with various stator teeth and a design method thereof, comprising the following steps: the stator comprises a plurality of stator teeth and a stator yoke, wherein the plurality of stator teeth are connected with the stator yoke, and a stator groove is formed between two adjacent stator teeth; an armature winding; the rotor is coupled to the stator, the rotor and the stator are separated by an air gap, the rotor comprises a rotor yoke and a plurality of rotor teeth arranged on the rotor yoke, and a first permanent magnet is embedded between the rotor teeth; the stator teeth are divided into n groups of stator teeth, each groupThe stator teeth groups comprise k stator teeth of different types, and the ends of the k stator teeth in each stator teeth group are sequentially separated by n spi Small stator teeth. The application of the technical scheme can realize: flexible motor slot pole matching selection; obtaining a bilateral permanent magnet motor with smaller cogging torque; when the device is used as a generator, a plurality of electric equipment working at different voltage levels can be matched at the same time.
Description
Technical Field
The invention relates to a bilateral permanent magnet motor with various stator teeth and a design method thereof.
Background
The permanent magnet motor is widely applied to the fields of industrial equipment, electric automobiles, aerospace and the like. Because the permanent magnet with high performance is adopted, the motor has the advantages of small volume, high power density and torque density and high reliability. A commonly used rotor permanent magnet motor places permanent magnets on the rotor side and winds armature windings on the stator side. Some motors also place permanent magnets on the stator side, known as stator permanent magnet motors. In order to further improve the torque density and the power density of the motor, permanent magnets can be simultaneously arranged on the stator side and the rotor side, and both the permanent magnets and the rotor side have positive effects on the torque, so that the motor output can be further increased, and the motor is called a double-sided permanent magnet motor.
The running quality characteristics of motor torque fluctuation amplitude, induced electromotive force waveform, maximum output power and the like are influenced by the matching selection of motor slot poles, and the number of winding poles and total stator tooth dividing number of the magnetic field modulation motor are required to meet a slot pole matching formula. In the existing double-sided permanent magnet motor, stator permanent magnets are uniformly arranged at stator tooth parts, the number of teeth of each stator is the same, and a conventional alternate pole structure is adopted at a rotor part. In addition, the pole pair number of windings selectable by the motor under each slot number is relatively fixed. The situation brings great limitation to the matching of the number of slots and the number of poles of the motor, and meanwhile, the cogging torque of the motor can be influenced. The influence of the cogging torque on the motor is generally reflected by using a cogging torque evaluation factor, wherein the value is the greatest common divisor GCD (N s ，P r ). As the evaluation factor is smaller, the cogging torque of the motor is smaller.
Due to the fact thatThe stator of the bilateral permanent magnet motor has the same number of teeth, the winding pole pair numbers of the motors with different slot numbers are relatively fixed, and after the stator slot numbers are determined, the total number of teeth and the pole number of the motor rotor are determined. The common 12-slot motor has 12 large stator teeth, and the total number of small stator teeth which can be separated under various stator tooth number is 24, 36, 48, … … and 12 x n sp Integer multiples of 12, where n sp Is the number of sub-teeth of a single stator tooth. And 12 slot motor windings employing concentrated windings are typically 4, 5, 7, 8 pairs of poles. According to a slot pole matching formula of the magnetic field modulation motor: p (P) w ＝|P s -P r I, P in r For the pole pair number of the rotor, P w P being the pole pair number of the armature winding s Is the total number of small teeth of the stator. The rotor pole pair number that can be matched for a 12 slot 5 pair pole motor is: p (P) r ＝12*n sp 5. The motor using distributed windings has similar results, and only 5 (P w ) The corresponding winding pole pair numbers are changed. Therefore, the pole pair number selection of the existing permanent magnet motor is limited greatly, the slot pole matching selection is not flexible enough, and the evaluation factor is difficult to reduce to the greatest extent.
The motor provided by the invention has various stator teeth with different tooth numbers, has a larger slot pole matching selection range, and is favorable for selecting slot pole matching with low cogging torque and good motor operation quality characteristics. In addition, as the tooth part of the existing permanent magnet synchronous motor has a single structure, the parameters of the induced electromotive force generated on each tooth winding are similar when the permanent magnet synchronous motor works in a generator state. The electric energy requirements of different electric equipment are difficult to be met by a single motor at the same time, a plurality of motors are required to be installed in some complex equipment, or corresponding AC/AC converters are provided, so that serious obstruction is brought to the miniaturization and the light weight of the equipment.
Disclosure of Invention
The invention aims to overcome at least one defect in the prior art and provide a double-sided permanent magnet motor with various stator teeth and a design method thereof.
In order to solve the above technical problems, the present invention provides a double-sided permanent magnet motor with multiple stator teeth, comprising:
the stator comprises a plurality of stator teeth and a stator yoke, wherein the plurality of stator teeth are connected with the stator yoke, and a stator groove is formed between two adjacent stator teeth;
armature windings wound on the stator teeth;
the rotor is coupled to the stator, the rotor and the stator are separated by an air gap, the rotor comprises a rotor yoke and a plurality of rotor teeth arranged on the rotor yoke, and a first permanent magnet is embedded between the rotor teeth;
wherein the stator teeth are divided into n groups of stator teeth groups, each group of stator teeth group comprises k stator teeth of different types, and the end parts of the k stator teeth in each group of stator teeth group are sequentially separated by n spi A small stator tooth, wherein i is the number from the 1 st stator tooth to the kth stator tooth in each stator tooth group, and n spi For the number of small stator teeth, second permanent magnets are embedded between adjacent small stator teeth according to n spi Is to distinguish between different types of stator teeth;
wherein the pole pair number P of the rotor r Pole pair number P of armature winding w And the total number of small stator teeth P s The relation between the two is: p (P) w ＝|P r ―P s |；
In the m-relativistic structure, n should also satisfy:wherein N is s The number of stator slots is m, the number of motor phases is m, and j is any positive integer;
total number of small stator teeth P s The following formula is also satisfied:
in a preferred embodiment, when the double-sided permanent magnet motor operates as a motor, the armature windings are a set of windings, and the principle of distribution of the armature windings is distributed according to a slot electromotive force star pattern.
In a preferred embodiment, when the double-sided permanent magnet motor operates as a generator, the armature winding components are formed into a plurality of sets of windings, the armature windings on the same type of stator teeth are wound into one set of windings, and the principle of single-set winding distribution is distributed according to a slot electromotive force star pattern.
In a further preferred embodiment, the rotor is placed in the stator and the first permanent magnet is magnetic steel.
In a further preferred embodiment, the second permanent magnet is polygonal.
In a further preferred embodiment, the second permanent magnet is square, triangular or diamond shaped.
The invention also provides a design method of the double-sided permanent magnet motor with various stator teeth, the double-sided permanent magnet motor comprises a stator, an armature winding and a rotor, the stator comprises a plurality of stator teeth and a stator yoke, the plurality of stator teeth are connected with the stator yoke, and a stator groove is formed between two adjacent stator teeth; the armature winding is wound on the stator teeth; the rotor is coupled to the stator, the rotor and the stator are separated by an air gap, the rotor comprises a rotor yoke and a plurality of rotor teeth arranged on the rotor yoke, and a first permanent magnet is embedded between the rotor teeth;
the design method comprises the following steps:
dividing the stator teeth into n groups of stator teeth groups, wherein each group of stator teeth group comprises k stator teeth of different types, and the end parts of the k stator teeth in each group of stator teeth group are sequentially separated by n spi A small stator tooth, wherein i is the number from the 1 st stator tooth to the kth stator tooth in each stator tooth group, and n spi For the number of small stator teeth, second permanent magnets are embedded between adjacent small stator teeth according to n spi Is to distinguish between different types of stator teeth;
by making the pole pair number P of the rotor r Pole pair number P of armature winding w And the total number of small stator teeth P s The relationship between them satisfies: p (P) w ＝|P r ―P s |；
In the relative structure of m, let n satisfy:wherein N is s The number of stator slots is m, the number of motor phases is m, and j is any positive integer;
make the total number P of small stator teeth s The following formula is satisfied:
in a preferred embodiment, when the double-sided permanent magnet motor operates as a motor, the armature windings are formed as a set of windings, and the principle of distribution of the armature windings is distributed according to a slot electromotive force star pattern.
In a preferred embodiment, when the double-sided permanent magnet motor operates as a generator, the armature winding components are divided into a plurality of sets of windings, the armature windings on the same type of stator teeth are wound into one set of windings, and the principle of single-set winding distribution is distributed according to a slot electromotive force star pattern.
In a further preferred embodiment, the second permanent magnet is polygonal.
In a further preferred embodiment, the second permanent magnet is square, triangular or diamond shaped.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) More flexible motor slot pole cooperation selection. The motor provided by the invention has various stator teeth with different tooth numbers, and the stator of the motor consists of large stator teeth with different tooth numbers. Through adjusting the number of teeth, the motor slot pole matching selection range is larger and more flexible.
(2) And obtaining the double-sided permanent magnet motor with smaller cogging torque. Cogging torque of double sided permanent magnet motors is typically large, and can adversely affect motor performance. The bilateral permanent magnet motor provided by the patent can flexibly adjust the slot pole matching of the motor, obtain smaller cogging torque evaluation factors and obtain the bilateral permanent magnet motor with smaller cogging torque.
(3) When the motor provided by the invention is used as a generator, different windings can be wound on large teeth with different tooth numbers, an intermediate power electronic converter is omitted, and alternating currents with different sizes are generated, so that a plurality of electric equipment working at different voltage levels can be matched at the same time.
Drawings
FIG. 1 is a structural development of a stator in a preferred embodiment of the present invention;
FIG. 2 is a first example of a double sided permanent magnet motor in accordance with a preferred embodiment of the present invention;
FIG. 3 is a second example of a double sided permanent magnet motor in accordance with a preferred embodiment of the present invention;
FIG. 4 is a structural development of the stator and rotor of the double sided permanent magnet motor of FIG. 3;
FIG. 5 is a waveform of motor output torque when two sets of windings of the bilateral permanent magnet motor shown in FIG. 3 are separately transmitted;
FIG. 6 is a waveform of motor output torque when the double-sided permanent magnet motor shown in FIG. 3 is used for synthesizing a set of windings for power transmission;
FIG. 7 shows two sets of induced electromotive forces formed in windings of the double sided permanent magnet motor of FIG. 3 when operating in a generator state;
FIG. 8 is an expanded view of the stator when the second permanent magnet is triangular in the preferred embodiment of the present invention;
fig. 9 is an expanded view of the stator when the second permanent magnet is diamond-shaped in the preferred embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
Certain directional terms used hereinafter to describe the drawings, such as "inner", "outer", "above", "below" and other directional terms, will be understood to have their normal meaning and refer to those directions as they would be when viewing the drawings. Unless otherwise indicated, directional terms described herein are generally in accordance with conventional directions as understood by those skilled in the art.
The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.
The double-sided permanent magnet motor with various stator teeth comprises a stator, an armature winding 2 and a rotor, wherein the stator comprises a plurality of stator teeth 11 and a stator yoke 12, the plurality of stator teeth 11 are connected with the stator yoke 12, and stator slots 13 are formed between two adjacent stator teeth 11; the armature winding 2 is wound on the stator teeth 11; the rotor is coupled to the stator, the rotor and the stator are separated by an air gap 4, the rotor comprises a rotor yoke 31 and a plurality of rotor teeth 32 arranged on the rotor yoke 31, and a first permanent magnet 33 is embedded between the rotor teeth 32.
When the motor is in a motor running state, the rotor generates torque under the action of the magnetic field of the armature winding 2 on the stator and rotates along a set direction; in the generator operating state, the rotor generates an alternating magnetic field during rotation.
Referring to fig. 1, the stator teeth 11 are divided into n groups of stator teeth, each group of stator teeth comprises k stator teeth 11 of different types, and the ends of the k stator teeth 11 in each group of stator teeth are sequentially separated by n spi A small stator tooth 111, where i is the number of the 1 st to the k th stator teeth 11 in each stator tooth group, n spi For the number of small stator teeth, second permanent magnets 14 are embedded between adjacent small stator teeth 111 according to n spi Is different to distinguish different types of stator teeth 11; wherein the pole pair number P of the rotor r Pole pair number P of armature winding 2 w And the total number P of small stator teeth 111 s The relation between the two is: p (P) w ＝|P r ―P s I (I); in the m-relativistic structure, n should also satisfy:wherein N is s The number of stator slots 13 is m, the number of motor phases is m, and j is any positive integer; total number P of small stator teeth 111 s The formula also needs to be satisfied:
when the motor is operated, the stator is powered with alternating current in the armature winding 2 to generate a rotating magnetic field, the rotating magnetic field is modulated to act on the air gap 4 to generate a plurality of harmonic waves, wherein the harmonic waves with the harmonic wave components of Ps-Pr pairs can interact with the magnetic field of the armature winding 2 to generate stable torque; when the generator is operated, the stator generates different levels of voltage on different types of stator teeth 11 windings under the action of the magnetic field. Therefore, the winding method of the armature winding 2 is correspondingly changed when the motor is operated and when the generator is operated. When the double-sided permanent magnet motor operates as a motor, the armature winding 2 is a set of windings, and the principle of distribution of the armature winding 2 is distributed according to a slot electromotive force star pattern. When the double-sided permanent magnet motor operates as a generator, the armature windings 2 are divided into a plurality of sets of windings, the armature windings 2 on the same type of stator teeth 11 are wound into one set of windings, and the principle of single-set winding distribution is distributed according to a slot electromotive force star pattern.
The armature winding 2 on the stator is connected to a power source (electric state) or a load (electric state) and is separated from the rotor by an air gap 4; the stator comprises a plurality of groups of stator teeth 11, the armature windings 2 on the same type of stator teeth 11 are led out through wires after being connected with each other, a plurality of groups of lead wires can be led out according to different tooth numbers (the number of small stator teeth 111), and the lead wires can be connected in series to form a group of lead wires.
The rotor further comprises a rotor core 34 and rotor magnet steel (first permanent magnets 33), which are placed inside the stator.
When the motor is operated, magnetomotive force is generated by the second permanent magnet 14 of the stator, and a large number of harmonic magnetic fields with different pole pairs are generated in the air gap after the modulation of the stator teeth 11. In addition, the magnetic field generated by the first permanent magnet 33 of the rotor is modulated by the salient pole teeth of the stator and the rotor to generate a plurality of harmonic waves with different pole pairs. The armature winding 2 on the stator is connected with an alternating current power supply, generates a rotating magnetic field in the air gap after being electrified, and generates harmonic magnetic fields with different pole pairs in the air gap through modulation. The magnetic fields of the three parts interact to generate electromagnetic torque pushing rotation on the rotor. When the generator is operated, the rotor rotates, the magnetic field forms induced electromotive forces with different voltage levels in the armature windings 2 on different types of stator teeth 11, the induced electromotive forces generate current in a closed loop, and then the current is supplied to different electric equipment by leads. Compared with the traditional motor with the same slot number, the motor can be applied to design different rotor pole numbers, so that slot pole matching is more flexible. The application motor with smaller cogging torque evaluation factors can be screened out, and the cogging torque of the motor is effectively reduced.
The second permanent magnet 14 is square, the second permanent magnet 14 is square magnetic steel, the processing cost of the rectangular magnetic steel is low relative to the fan-shaped magnetic steel, the magnetic steel yield is high, and the influence on the performance of the motor is small. In some simple alternatives, the second permanent magnet 14 may also be triangular or diamond-shaped.
The invention also provides a design method of the double-sided permanent magnet motor with various stator teeth, the double-sided permanent magnet motor comprises a stator, an armature winding 2 and a rotor, the stator comprises a plurality of stator teeth 11 and a stator yoke 12, the plurality of stator teeth 11 are connected with the stator yoke 12, and a stator groove 13 is formed between two adjacent stator teeth 11; the armature winding 2 is wound on the stator teeth 11; the rotor is coupled to the stator, the rotor and the stator are separated by an air gap 4, the rotor comprises a rotor yoke 31 and a plurality of rotor teeth 32 arranged on the rotor yoke 31, and a first permanent magnet 33 is embedded between the rotor teeth 32; the design method comprises the following steps: dividing the stator teeth 11 into n groups of stator teeth groups, wherein each group of stator teeth group comprises k stator teeth 11 of different types, and the ends of the k stator teeth 11 in each group of stator teeth group are sequentially separated by n spi A small stator tooth 111, where i is the number of the 1 st to the k th stator teeth 11 in each stator tooth group, n spi For the number of small stator teeth 111 in the stator teeth 11, second permanent magnets 14 are embedded between adjacent small stator teeth 111 according to n spi Is different to distinguish different types of stator teeth 11; by making the pole pair number P of the rotor r Pole pair number P of armature winding 2 w And the total number P of small stator teeth 111 s The relationship between them satisfies: p (P) w ＝|P r ―P s I (I); in the relative structure of m, let n satisfy:
wherein N is s The number of stator slots 13 is m, the number of motor phases is m, and j is any positive integer; make the total number P of small stator teeth 111 s The following formula is satisfied: />
When the double-sided permanent magnet motor operates as a motor, the armature winding 2 is made to be a set of windings, and the principle of distribution of the armature winding 2 is distributed according to a slot electromotive force star pattern.
When the double-sided permanent magnet motor operates as a generator, the armature winding 2 is divided into a plurality of sets of windings, the armature windings 2 on the same type of stator teeth 11 are wound into one set of windings, and the principle of single-set winding distribution is distributed according to a slot electromotive force star pattern.
Fig. 2 shows a structure of the applied motor in which the motor stator is composed of two types of stator big teeth, wherein the first type of stator big teeth comprises three small teeth and the second type of stator big teeth comprises two small teeth. Where n=6, n sp1 ＝2，n sp2 ＝3，m＝3，N s =12, k=2, P is found according to the formula s ＝30。
Fig. 3 shows another motor sample provided by the embodiment of the present invention, which includes:
and (3) a stator: 12 first type stator teeth 11 and 12 second type stator teeth 11 arranged in turn in the circumferential direction on the stator yoke 12, each second type stator tooth 11 being located between two first type stator teeth 11. Each stator tooth 11 is wound with a winding. The teeth of each first type of stator tooth 11 are separated by two small stator teeth 111, which are embedded with 1 second permanent magnet 14.
A rotor: 26 empty slots are circumferentially arranged on the rotor yoke 31, each empty slot is embedded with a first permanent magnet 33, the slots are separated by rotor teeth 32, and one empty slot is arranged in the center of the rotor structure as a rotating shaft. The stator and the rotor are separated by an air gap. Fig. 4 is an expanded view of the stator and rotor teeth 32 and the yoke structure of the motor of this example.
When the motor works in a motor state, the motor of the sample can be controlled by two sets of windings, and the two sets of windings can be combined into one set to control the motor. The number of turns of windings and current density are kept unchanged, and when the windings are divided into two sets of windings to transmit power respectively, the waveform of the output torque of the motor is shown in figure 5. When the resultant set of windings is operated, the motor output torque waveform is as shown in fig. 6. When the motor works in the generator state, the prime motor drives the rotating shaft to enable the rotor to rotate, 26 first permanent magnets 33 on the rotor form a rotating magnetic field, the rotating magnetic field and the magnetic field generated by the second permanent magnets 14 on 12 first-type stator teeth 11 in the stator jointly act, induced electromotive force is formed in windings on 24 stator teeth 11, and two groups of three-phase alternating currents are formed after the induced electromotive force is led out through wires, as shown in fig. 7.
Fig. 8 shows an alternative to the stator teeth 11, the second permanent magnets 14 employed in the construction of the stator teeth 11 being triangular permanent magnets.
Fig. 9 shows an alternative to the stator teeth 11, the second permanent magnets 14 employed in the construction of the stator teeth 11 being diamond-shaped permanent magnets.
The foregoing is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art will be able to make insubstantial modifications of the present invention within the scope of the present invention disclosed herein by this concept, which falls within the actions of invading the protection scope of the present invention.
Claims (10)
1. A double sided permanent magnet motor having multiple stator teeth, comprising:
the stator comprises a plurality of stator teeth and a stator yoke, wherein the plurality of stator teeth are connected with the stator yoke, and a stator groove is formed between two adjacent stator teeth;
armature windings wound on the stator teeth;
the rotor is coupled to the stator, the rotor and the stator are separated by an air gap, the rotor comprises a rotor yoke and a plurality of rotor teeth arranged on the rotor yoke, and a first permanent magnet is embedded between the rotor teeth;
wherein the stator teeth are divided into n groups of stator teeth groups, each group of stator teeth group comprises k stator teeth of different types, and the end parts of the k stator teeth in each group of stator teeth group are sequentially separated by n spi A small stator tooth, wherein i is the number from the 1 st stator tooth to the kth stator tooth in each stator tooth group, and n spi For the number of small stator teeth, second permanent magnets are embedded between adjacent small stator teeth according to n spi Is to distinguish between different types of stator teeth;
wherein the pole pair number P of the rotor r Pole pair number P of armature winding w And the total number of small stator teeth P s The relation between the two is: p (P) w ＝|P r ―P s |；
In the m-relativistic structure, n should also satisfy:wherein N is s The number of stator slots is m, the number of motor phases is m, and j is any positive integer;
total number of small stator teeth P s The following formula is also satisfied:
2. a double sided permanent magnet machine with multiple stator teeth as claimed in claim 1 wherein: when the double-sided permanent magnet motor operates as a motor, the armature winding is a set of windings, and the principle of distribution of the armature winding is distributed according to a slot electromotive force star pattern.
3. A double sided permanent magnet machine with multiple stator teeth as claimed in claim 1 wherein: when the bilateral permanent magnet motor operates as a generator, the armature winding component is divided into a plurality of sets of windings, the armature windings on the same type of stator teeth are wound into one set of windings, and the principle of single set of windings distribution is distributed according to a slot electromotive force star pattern.
4. A double sided permanent magnet machine with multiple stator teeth as claimed in claim 1 wherein: the rotor is placed in the stator, and the first permanent magnet is magnetic steel.
5. A double sided permanent magnet machine with multiple stator teeth as claimed in claim 1 wherein: the second permanent magnet is polygonal.
6. A double sided permanent magnet machine with multiple stator teeth as claimed in claim 5 wherein: the second permanent magnet is square, triangular or diamond.
7. The design method of the double-sided permanent magnet motor with various stator teeth comprises a stator, an armature winding and a rotor, wherein the stator comprises a plurality of stator teeth and a stator yoke, the plurality of stator teeth are connected with the stator yoke, and a stator groove is formed between two adjacent stator teeth; the armature winding is wound on the stator teeth; the rotor is coupled to the stator, the rotor and the stator are separated by an air gap, the rotor comprises a rotor yoke and a plurality of rotor teeth arranged on the rotor yoke, and a first permanent magnet is embedded between the rotor teeth;
the design method comprises the following steps:
dividing the stator teeth into n groups of stator teeth groups, wherein each group of stator teeth group comprises k stator teeth of different types, and the end parts of the k stator teeth in each group of stator teeth group are sequentially separated by n spi A small stator tooth, wherein i is the number from the 1 st stator tooth to the kth stator tooth in each stator tooth group, and n spi For the number of small stator teeth, second permanent magnets are embedded between adjacent small stator teeth according to n spi Is to distinguish between different types of stator teeth;
by making the pole pair number P of the rotor r Electric powerPole pair number P of pivot winding w And the total number of small stator teeth P s The relationship between them satisfies: p (P) w ＝|P r ―P s |；
In the relative structure of m, let n satisfy:wherein N is s The number of stator slots is m, the number of motor phases is m, and j is any positive integer;
make the total number P of small stator teeth s The following formula is satisfied:
8. the method of designing a double sided permanent magnet motor with multiple stator teeth of claim 7, wherein: when the double-sided permanent magnet motor operates as a motor, the armature winding is made to be a set of windings, and the principle of distribution of the armature winding is distributed according to a slot electromotive force star pattern.
9. The method of designing a double sided permanent magnet motor with multiple stator teeth of claim 7, wherein: when the bilateral permanent magnet motor operates as a generator, the armature winding component is divided into a plurality of sets of windings, the armature windings on the same type of stator teeth are wound into one set of windings, and the principle of single set of winding distribution is distributed according to a slot electromotive force star pattern.
10. The method of designing a double sided permanent magnet motor with multiple stator teeth of claim 7, wherein: the second permanent magnet is square, triangular or diamond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311433785.7A CN117394630A (en) | 2023-10-31 | 2023-10-31 | Bilateral permanent magnet motor with various stator teeth and design method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311433785.7A CN117394630A (en) | 2023-10-31 | 2023-10-31 | Bilateral permanent magnet motor with various stator teeth and design method thereof |
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| CN117394630A true CN117394630A (en) | 2024-01-12 |
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| CN202311433785.7A Pending CN117394630A (en) | 2023-10-31 | 2023-10-31 | Bilateral permanent magnet motor with various stator teeth and design method thereof |
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| CN (1) | CN117394630A (en) |
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