KR20120056623A - Permanent magnet linear and rotating type synchronous motor - Google Patents

Abstract

PURPOSE: A permanent magnetic type linear synchronous motor and a rotary type synchronous motor are provided to enhance power density by attaching a permanent magnet and a coil to a mover at the same time. CONSTITUTION: A mover(10) is composed of three permanent magnets(20), a coil(30), and an iron core(40). The coil is composed of an A-shaft wire(31), a B-shaft wire(32), and a C-shaft wire(33). A first protrusion unit(41), a second protrusion unit(42), and a third protrusion unit(43) are formed at the lower side of the iron coil. A stator(50) is composed of the iron core including a chisel lot(51) structure. The iron core of the stator and the mover is laminated to a movement direction of the stator.

Description

Permanent magnet linear and rotating type synchronous motor

The present invention relates to a permanent magnet linear synchronous motor and a rotary synchronous motor, and more particularly, to a permanent magnet linear synchronous motor and a rotary synchronous motor capable of realizing high power density.

In the case of a general permanent magnet linear synchronous motor, first, a three-phase winding is placed on the stator, and a permanent magnet is placed on the corresponding mover. A linear motion can be obtained in the form of a mobile armature that arranges.

The two types of linear motors are selectively applied to logistics movements or machine tool transfers requiring relatively short distances in the production site.

 However, in case of long distance transfer, expensive permanent magnets are placed in the stator, which is the actual moving path in the case of mobile armature type, and the price is high.In the case of mobile field type, the three-phase winding is placed on the stator. Since a separate power converter must be installed for each section, there is a disadvantage that the structure of the stator is complicated and costs a lot of maintenance.

In addition, the surface of coils or permanent magnets that play an electrically or magnetically active role in a relatively poor production environment or external environment may be exposed to provide a cause of failure and accident.

In order to solve the above problems, rotary motors and power converters such as rack-pinions are used in applications requiring linear motion, but this is also difficult for maintenance, limit of rated speed, noise and vibration, mechanical Due to the fine particles generated in the power converter has a problem such that the operation is restricted in a clean environment.

Therefore, the stator of the linear synchronous motor is inexpensive, easy to maintain, and requires a high environmental resistance and a high output linear synchronous motor.

The present invention provides a permanent magnet type linear synchronous motor that can be made to overcome the above problems by constructing the stator only with the iron core and mounting the permanent magnet and the coil at the same time to increase the thrust density and at the same time the price competitiveness It is for that purpose.

In addition, it is another object of the present invention to provide a permanent magnet type synchronous motor capable of increasing the power density and improving the price competitiveness by mounting the rotor only with the iron core and mounting the permanent magnet and the coil at the same time.

In order to achieve the above object, the present invention is made of an iron core and is formed with a projection including a first projection, a second projection and a third projection in the longitudinal direction, the A-phase winding, B-phase winding and C sequentially A mover in which phase windings are disposed; A stator having a gap between the mover and a tooth slot structure having a tooth slot structure at a period of twice the interval (2τp), the stator being disposed along the moving direction of the mover; And a permanent magnet set consisting of a plurality of unit magnets disposed on a surface of the mover at each end of the protrusion that faces the tooth slot structure, wherein the magnetization direction of the plurality of unit magnets is a Halbach array. It is arranged repeatedly based on.

Preferably, the B-phase winding and the C-phase winding have the protrusions arranged so as to have a phase difference of 2nπ ± 2π / 3 (n is an integer) at an electrical angle with respect to the A-phase winding, and magnetization of the unit magnets. The direction is characterized in that arranged repeatedly every 2τp.

More preferably, the magnetization direction of the unit magnet is characterized in that arranged repeatedly in the order ↓, ←, ↑ starting with →.

Preferably, the magnetization direction of the unit magnet is characterized in that it is repeatedly arranged in the order ↑, ←, ↓ starting with →.

Preferably, the magnetization direction of the unit magnets are repeatedly arranged in the order of starting with →, ↓, ←, nonmagnetic iron core of the mover having a unit magnet width.

More preferably, a half width of the last non-magnetic iron core width of the protrusion is formed at the beginning to form a half width iron core at both ends.

More preferably, the cross-sections of the individual unit magnets are formed in a combination of a parallelogram and a rhombus that can be continuously coupled in a 2τp section in order to increase the bonding strength.

In addition, the present invention is formed of an annular iron core and formed with a projection including a first projection, a second projection and a third projection in the radially inner direction, the projections A-phase winding, B-phase winding and C-phase winding sequentially A stator in which it is placed; The rotor and the stator of the annular iron core which is located inside the annular stator and is formed with a period of two times (2τp) of the pole spacing in the tooth slot structure on the surface in the radially outward direction while having a gap between the stator and the stator Each protruding end includes a permanent magnet set consisting of a plurality of unit magnets disposed on a surface opposite to the tooth slot structure of the rotor, and the magnetization direction of the plurality of unit magnets is based on a Halbach array. It is placed repeatedly.

In addition, the present invention is formed of an annular iron core and formed with a projection including a first projection, a second projection and a third projection in the radially outward direction, and the A-phase winding, B-phase winding and C-phase winding sequentially A stator in which it is placed; The rotor of the annular iron core and the stator, which is located outside the annular stator and is formed with a period of two times (2τp) of the pole spacing with a tooth slot structure on a surface in a radially inner direction while having a gap between the stator and the stator. Each protruding end includes a permanent magnet set consisting of a plurality of unit magnets disposed on a surface opposite to the tooth slot structure of the rotor, and the magnetization direction of the plurality of unit magnets is based on a Halbach array. It is placed repeatedly.

Preferably, the B-phase winding and the C-phase winding have the protrusions arranged so as to have a phase difference of 2nπ ± 2π / 3 (n is an integer) at an electrical angle with respect to the A-phase winding, and magnetization of the unit magnets. The direction is characterized in that arranged repeatedly every 2τp.

More preferably, the magnetization direction of the unit magnet is characterized in that it is repeatedly arranged in the order ↓, ←, ↑ starting from the start in the counterclockwise direction.

Preferably, the magnetizing direction of the unit magnet is characterized in that it is repeatedly arranged in the order ↑, ←, ↓ in the counterclockwise direction from the beginning to the beginning.

Preferably, the magnetization direction of the unit magnet is repeatedly arranged in the order of the non-magnetized iron core of the stator having a unit magnet width ↓, ←, in the counterclockwise direction from the beginning to the beginning →.

More preferably, a half width of the last non-magnetic iron core width of the protrusion is formed at the beginning to form a half width iron core at both ends.

Preferably, the cross-section of the individual unit magnets is characterized in that formed in a combination of a parallelogram and a rhombus that can be continuously coupled in a 2τp interval in order to increase the bonding strength.

1 is a cross-sectional view illustrating a first embodiment of a permanent magnet linear synchronous motor according to the present invention,
2 is a cross-sectional view illustrating a second embodiment of a permanent magnet linear synchronous motor according to the present invention;
3 is a cross-sectional view illustrating a third embodiment of a permanent magnet linear synchronous motor according to the present invention;
4 is a cross-sectional view illustrating a fourth embodiment of a permanent magnet linear synchronous motor according to the present invention;
5 is a cross-sectional view for explaining the fixed shape of the permanent magnet in the permanent magnet linear synchronous motor according to the present invention,
6 is a graph comparing the no-load linkage flux of the permanent magnet linear synchronous motor according to the present invention,
7 is a graph comparing the generated thrust of the permanent magnet linear synchronous motor according to the present invention,
8 is a graph comparing suction force of the permanent magnet linear synchronous motor according to the present invention.
9 is a cross-sectional view illustrating a fifth embodiment of a permanent magnet type synchronous motor according to the present invention;
10 is a cross-sectional view illustrating a sixth embodiment of a permanent magnet type synchronous motor according to the present invention;
11 is a cross-sectional view illustrating a seventh embodiment of a permanent magnet type synchronous motor according to the present invention;
12 is a cross-sectional view for explaining an eighth embodiment of a permanent magnet type synchronous motor according to the present invention;
13 is a cross-sectional view illustrating a ninth embodiment of a permanent magnet type synchronous motor according to the present invention;
14 is a cross-sectional view illustrating a tenth embodiment of a permanent magnet type synchronous motor according to the present invention;
15 is a cross-sectional view illustrating an eleventh embodiment of a permanent magnet type synchronous motor according to the present invention;
16 is a cross-sectional view illustrating a twelfth embodiment of the permanent magnet type synchronous motor according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, the first embodiment of the present invention will be described with reference to FIG.

The permanent magnet linear synchronous motor 100 according to the present invention includes a mover 10 and a stator 50.

The mover 10 is composed of a permanent magnet set 20, the winding 30 and the iron core 40, the winding 30 is the A phase winding 31, B phase winding 32, C phase winding ( It consists of three phases of 33).

The iron core 40 has a first protrusion 41, a second protrusion 42, and a third protrusion 43 downwardly based on the base 44 covering the entire area in an 'E' shape.

Meanwhile, the A-phase winding 31 is wound around the first protrusion 41, the B-phase winding 32 is wound around the second protrusion 42, and finally, the C-phase winding around the third protrusion 43. 33 is wound up.

The B-phase winding 32 and the C-phase winding 33 are spatially arranged to have a phase difference of 2nπ ± 2π / 3 (n is an integer) at an electric angle with respect to the A-phase winding 31.

The protrusions 41, 42, 43 have the same width b, the width may be an integer multiple of the pole spacing tau p, in the case of 6τp in the embodiment. The spacing w between the protrusions 41, 42, and 43 is arranged such that b + w becomes 2 nτp ± 2 / 3τp (n is an integer), and in the embodiment, has a size of 2τp + 2 / 3τp.

Permanent magnet set 20 is disposed on the protrusions 41, 42, 43. The permanent magnet set 20 is composed of twelve (M1, M2, ..., M12) of the same unit magnet 21, each unit magnet 21 forms a magnetizing direction according to a predetermined rule.

The magnetization direction of the unit magnet 21 according to the first embodiment of the present invention is a magnetization direction is formed in a repetitive pattern every 2τp twice the pole interval based on the Halbach array.

As shown in FIG. 1, the magnetization directions of the unit magnets 21 are M1: →, M2: ↓, M3: ←, M4: ↑, and the remaining unit magnets 21 are magnetized in such a manner that the above sequence is repeated. Form. Here, the magnetization direction "→" means that the pole direction of the magnet is arranged in SN.

That is, the magnetizing direction is formed by first rotating the 90 ° magnetizing direction clockwise starting from →.

However, if necessary, the initial magnetization direction can be selectively changed.

The stator 50 according to the first embodiment of the present invention has a simple structure and is composed of an iron core including a tooth slot 51 structure as shown in FIG. 1.

The size a of the unit tooth slot 51 of the stator 50 is formed to be 2τp to work with the mover 10.

The iron cores of the mover 10 and the stator 20 are preferably stacked in the moving direction of the mover 10 to reduce iron loss, and also have a predetermined angle in a direction perpendicular to the traveling direction to reduce the ripple of thrust. It is more preferable to skew at an angle

Next, a second embodiment of the present invention will be described.

Since the second embodiment is the same as the first embodiment except for the magnetizing direction, only the magnetizing direction will be described.

The magnetizing direction of the second embodiment of the present invention is characterized in that it is formed by first rotating the magnetizing direction by 90 degrees in the counterclockwise direction starting from '→'.

That is, M1: →, M2: ↑, M3: ←, M4: ↓, and the remaining unit magnets 21 are formed by repeating the above pattern.

Next, a third embodiment of the present invention will be described.

Since the third embodiment also shows a difference only in the magnetization direction of the unit magnet 20, only the magnetization direction will be described.

The third embodiment is configured to replace the iron core 40 by removing the unit magnet 21 in the '↑' direction in the first embodiment shown in FIG.

Therefore, the unit magnets 21 of M4, M8 and M12 are removed, and the iron core 40 is formed at the position, which is advantageous in fixing the unit magnets 21.

The arrangement of the unit magnet 21 as described above has the advantage that can be used at the same time by the force due to the change of the electromagnetic force and the magnetoresistance to increase the generated thrust by increasing the no-load back EMF.

Next, a fourth embodiment according to the present invention will be described.

As shown in FIG. 4, the fourth embodiment has the same arrangement of unit magnets 21 as in the third embodiment, but distributes half of the iron core 40 replaced by the M12 to both ends 61 and 62. It is a structure. The arrangement as described above is a structure that is convenient to fix to the iron core 40 by uniting the three unit magnets 21 because the M4, M8 portion of the ends and the middle of the protrusions (41, 42, 43) is formed of an iron core (40) The mechanical electrical characteristics are almost the same as in the third embodiment.

On the other hand, since the unit magnet 21 is manufactured separately and must be inserted or fixed to the lower end of the protrusions 41, 42, 43, in the case of a rectangular cross section, it is easy to fall off after fixing and should be firmly fixed.

However, as shown in FIG. 5, when the cross section of the unit magnets 21 is formed by combining a trapezoid and a parallelogram instead of a rectangle, the unit magnets 21 are structurally stable because the entire unit magnets 21 do not fall down. There is a characteristic.

In addition, the no-load linkage flux, the generating thrust and the suction force for the above three embodiments are shown in FIGS. 6, 7 and 8, respectively.

Here, array 1 represents the first embodiment, array 2 represents the second embodiment, and array 3 represents the third embodiment.

6 is a comparison of the amount of linkage flux in one phase according to the position of the mover in the no-load state in which no current is applied to the three-phase winding, and arrangement 3 (third embodiment) has the largest value, which is the counter electromotive force in the no-load state. This cursor means that the output can be large when the same current is applied.

7 and 8 compare the thrust and suction force per unit length generated when applying a three-phase magnetic force of 1000 AT in each phase. Arrangement 3 (third embodiment), which has a thrust component due to electromagnetic force and a thrust component due to a change in magnetic resistance, has the largest thrust, but also has the largest value in the ripple and suction force of the thrust. Thrust ripple can be largely eliminated by skewing the core of the stator or mover at an angle perpendicular to the travel.

The following describes embodiments of the permanent magnet type synchronous motor 200 according to the present invention.

First, the fifth embodiment will be described with reference to FIG.

As shown in FIG. 9, the permanent magnet type synchronous motor 200 according to the present invention includes a rotor 210 and a stator 250.

The rotor 210 has the same structure as the stator 50 of the linear electric motor of the first embodiment, but shows a difference only in the one that is deformed in an annular shape.

Also has a tooth slot 211 and the period of the tooth slot 211 is 2τp.

The stator 250 has the same structure as that of the mover 10 of the first embodiment, except that the stator 250 is only deformed in an annular shape.

Next, a sixth embodiment will be described with reference to FIG.

In the sixth embodiment, as shown in FIG. 10, in the first embodiment, the mover 10 is annularly disposed by the stator 210, and the stator 50 of the linear motor is annularly rotated by the rotor 210. Only difference is shown.

At this time, the stator 250 is characterized in that located inside the rotor 210, the structure of the relatively replace the position of the stator 250 and the rotor 210 of the fifth embodiment.

Next, a seventh embodiment will be described with reference to FIG.

As shown in FIG. 11, the seventh embodiment has the same structure as the stator 50 of the linear motor of the second embodiment, except that the rotor 210 is only deformed in an annular shape.

The stator 250 has the same structure as that of the mover 10 of the second embodiment, except that the stator 250 is only deformed in an annular shape.

Next, an eighth embodiment will be described with reference to FIG.

As shown in FIG. 12, the eighth embodiment annularly arranges the mover 10 as the stator 250 in the second embodiment, and moves the stator 50 of the linear motor to the outer circumference of the stator 250. The difference is only shown in the annular arrangement of the rotor 210.

Therefore, the eighth embodiment has a structure in which the relative positions of the stator 250 and the rotor 210 of the seventh embodiment are replaced.

Next, a ninth embodiment will be described with reference to FIG.

As shown in FIG. 13, the ninth embodiment has the same structure as the stator 50 of the linear motor of the third embodiment, but only the one deformed in an annular shape.

The stator 250 has the same structure as that of the mover 10 of the third embodiment, but shows a difference only in the one transformed into an annular shape.

Next, a tenth embodiment will be described with reference to FIG.

As shown in FIG. 14, the tenth embodiment has an annular arrangement of the mover 10 with the stator 250 in the third embodiment, and the stator 50 of the linear electric motor is disposed outside the circumference of the stator 250. The difference is shown only in the annular arrangement of the rotor 250.

Therefore, the tenth embodiment has a structure in which the relative positions of the stator 250 and the rotor 210 of the ninth embodiment are replaced.

Next, an eleventh embodiment will be described with reference to FIG.

As shown in FIG. 15, the eleventh embodiment has the same structure as that of the stator 50 of the linear motor of the fourth embodiment, except that the rotor 210 is only deformed in an annular shape.

The stator 250 has the same structure as that of the mover 10 of the fourth embodiment, except that the stator 250 is only deformed in an annular shape.

Finally, a twelfth embodiment will be described with reference to FIG.

In the twelfth embodiment, as shown in FIG. 16, in the fourth embodiment, the mover 10 is annularly arranged with the stator 250, and the stator 50 of the linear electric motor is disposed outside the circumference of the stator 250. The difference is shown only in the annular arrangement of the rotor 250.

Therefore, the twelfth embodiment has a structure in which the relative positions of the stator 250 and the rotor 210 of the tenth embodiment are replaced.

In addition, if necessary, the permanent magnet set 20 of the permanent magnet type synchronous motor 200 may arrange the unit magnets 21 in a structure as shown in FIG. 5.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, And all of the various forms of embodiments that can be practiced without departing from the technical spirit.

10: mover 20: three permanent magnets
21: unit magnet 30: winding
31: A phase winding 32: B phase winding
33: winding of phase C 40: iron core
41: first protrusion 42: second protrusion
43: third protrusion 44: base
50: stator 51: tooth slot
61, 62: end 100: permanent magnet linear synchronous motor
200: permanent magnet type synchronous motor 210: rotor
211: Chislot 250: Stator
251: Chislot

Claims (19)

A mover made of an iron core and having a protrusion including a first protrusion, a second protrusion, and a third protrusion in a longitudinal direction, and the A-phase winding, the B-phase winding, and the C-phase winding sequentially disposed on the protrusion;
A stator having a gap between the mover and a tooth slot structure having a tooth slot structure at a period of twice the interval (2τp), the stator being disposed along the moving direction of the mover; And
Comprising a permanent magnet set consisting of a plurality of unit magnets disposed on the surface opposite to the tooth slot structure of the fixing portion at each end of the protrusion,
The magnetization direction of the plurality of unit magnets are permanent magnet type linear synchronous motor that is repeatedly arranged based on the Halbach array (Halbach array).
The method according to claim 1, wherein the B-phase winding and the C-phase winding is the projection is arranged so that each can have a phase difference of 2nπ ± 2π / 3 (n is an integer) with respect to the electrical phase, A,
The magnetization direction of the unit magnet is a permanent magnet type linear synchronous motor, characterized in that arranged repeatedly every 2τp.
The permanent magnet type linear synchronous motor according to claim 2, wherein the magnetization direction of the unit magnet is repeatedly arranged in the order of ↓, ←, ↑ starting with →.
The permanent magnet linear synchronous motor according to claim 2, wherein the magnetization direction of the unit magnet is repeatedly arranged in the order of ↑, ←, ↓ in order of →.
The permanent magnet linear synchronous motor of claim 2, wherein the magnetization direction of the unit magnet is repeatedly arranged in the order of?,?,?, And non-magnetic iron core of the mover having a unit magnet width.
The permanent magnet type linear synchronous motor according to claim 5, wherein half the width of the last non-magnetic iron core width of the protrusion is formed at the beginning to form half width iron cores at both ends.
The permanent magnet linear synchronous motor of claim 3 or 4, wherein the cross-sections of the individual unit magnets are formed of a combination of parallelograms and rhombuses that can be continuously coupled in a 2τp section in order to increase bonding strength.
The permanent magnet type according to claim 5 or 6, wherein the cross-sections of the nonmagnetic iron cores of the individual unit magnets and the mover are formed of a combination of parallelograms and lozenges that can be continuously coupled in a 2τp section in order to increase bonding strength. Linear synchronous motor.
A stator formed of an annular iron core and having a protrusion including a first protrusion, a second protrusion, and a third protrusion in a radially inner direction, and the A phase windings, the B phase windings, and the C phase windings sequentially disposed on the protrusions;
A rotor of an annular iron core which is located inside the annular stator and has a gap between the stator and is formed at a period of two times (2τp) of the pole spacing in a tooth slot structure on a radially outer surface;
Each protrusion end of the stator includes a permanent magnet set consisting of a plurality of unit magnets disposed on a surface facing the tooth slot structure of the rotor,
The magnetization direction of the plurality of unit magnets is a permanent magnet rotary synchronous motor that is repeatedly arranged based on the Halbach array (Halbach array).
A stator formed of an annular iron core and having a protrusion including a first protrusion, a second protrusion, and a third protrusion in a radially outward direction, and the A-phase winding, the B-phase winding, and the C-phase winding sequentially disposed on the protrusion;
A rotor of an annular iron core which is located outside the annular stator and is formed at a period of twice the interval between poles (2τp) with a tooth slot structure on a surface in a radially inner direction while having a space between the stator;
Each protrusion end of the stator includes a permanent magnet set consisting of a plurality of unit magnets disposed on a surface facing the tooth slot structure of the rotor,
The magnetization direction of the plurality of unit magnets is a permanent magnet rotary synchronous motor that is repeatedly arranged based on the Halbach array (Halbach array).
The method according to claim 10 or 11, wherein the B-phase winding and the C-phase winding, the protrusions are arranged so as to have a phase difference of 2nπ ± 2π / 3 (n is an integer) at an electrical angle with respect to the A-phase winding,
The magnetization direction of the unit magnet is a permanent magnet type synchronous motor, characterized in that it is repeatedly arranged every 2τp.
12. The permanent magnet type synchronous motor of claim 11, wherein the magnetization direction of the unit magnet is repeatedly arranged in the order of ↓, ←, ↑ in the order of counterclockwise from the beginning.
The permanent magnet rotating synchronous motor according to claim 11, wherein the magnetization direction of the unit magnet is repeatedly arranged in the order of ↑, ←, ↓ starting from the beginning in the counterclockwise direction.
12. The permanent magnet type of claim 11, wherein the magnetization direction of the unit magnet is repeatedly arranged in the order of non-magnetic iron core of the stator having a unit magnet width from ↓, ←, starting from the counterclockwise direction at the beginning. Rotary synchronous motors.
15. The permanent magnet type synchronous motor of claim 14, wherein half the width of the last non-magnetic iron core width of the protrusion is formed at the beginning to form a half width iron core at both ends.
The permanent magnet rotating synchronous motor according to claim 12, wherein the cross-sections of the individual unit magnets are formed of a combination of parallelograms and rhombuses that can be continuously coupled in a 2τp section in order to increase bonding strength.
The permanent magnet rotary synchronous motor of claim 13, wherein the cross-sections of the individual unit magnets are formed of a combination of parallelograms and rhombuses that can be continuously coupled in a 2τp section in order to increase bonding strength.
15. The permanent magnet rotating synchronization according to claim 14, wherein the cross-sections of the nonmagnetic iron cores of the individual unit magnets and the mover are formed of a combination of parallelograms and rhombuses that can be continuously coupled in a 2τp section in order to increase coupling strength. Electric motor.
16. The permanent magnet rotating synchronization according to claim 15, wherein the cross-sections of the nonmagnetic iron cores of the individual unit magnets and the mover are formed of a combination of parallelograms and rhombuses that can be continuously coupled in a 2? P interval in order to increase coupling strength. Electric motor.

Images