KR102416020B1 - High Efficiency Motor - Google Patents

Abstract

The present invention relates to a high efficiency motor capable of controlling useful magnetic flux quantity through clustering of permanent magnets. The high efficiency motor capable of controlling useful magnetic flux quantity through clustering of permanent magnets includes: permanent magnets disposed on an outer side in a radial direction of an armature and manufactured using an annular sector plate; a plurality of permanent magnet insertion holes manufactured for clustering of the permanent magnets to insert the permanent magnets in a slot format; and a permanent magnet supporting module integrally forming the plurality of permanent magnet insertion holes to support the permanent magnets and performing a function of prediction and management by useful magnetic flux quantity measurement.

Description

High-efficiency motor capable of controlling effective magnetic flux through permanent magnet clustering

The present invention relates to a high-efficiency electric motor capable of effective magnetic flux control through clustering of permanent magnets, and more specifically, an efficient lot of magnets to stabilize the characteristics of the motor through effective magnetic flux control. It is possible to manage, and it is possible to easily control changes in the characteristics of magnets and residual magnetic flux density (Br), which can vary depending on the lot, which is a factor that destabilizes the characteristics of the motor, and predicts a constant effective magnetic flux. It relates to a high-efficiency motor capable of controlling the effective magnetic flux through clustering of permanent magnets, which can be managed and the efficiency of the motor can be significantly improved than before.

Total flux refers to the total number of magnetic force lines from one pole of a magnet that pass through the coil wound around the slot of the armature and return to the opposite pole.

No matter how large the amount of magnetic flux emitted from the magnet, if the effective magnetic flux passing through the coil in the corresponding slot of the armature and returning to the opposite pole is small, the remaining amount of magnetic flux is lost.

Therefore, it is economical and efficient to use the magnet in the motor, that is, the electric motor, to make the effective magnetic flux amount of all the magnetic flux emitted by the magnet as much as possible.

On the other hand, when the effective magnetic flux in a motor is insufficient, the motor rotation speed (rpm) at no load increases, the torque of the motor decreases, the current value (ampere) rises, and heat generation in the coil of the motor becomes severe. .

In order to solve this problem, conventional methods include ① increasing the thickness of the magnet, ② changing the material of the magnet to one with a higher residual magnetic flux density (Br) than the current material, ③ increasing the length and width of the magnet. method has been used.

However, these methods are inevitably an uneconomical alternative in that mold costs are additionally generated.

As another way to solve this problem, external magnetization or full magnetization can be made, but the demagnetization problem due to the temporary drop in the permeance coefficient that can occur in internal magnetization and the upgrade of the magnetizing power and magnetization ), technology development is required in that it cannot be a good alternative.

In addition, there are considerable parts to be managed in many aspects of a normal electric machine. This will be described with reference to FIG. 1 .

1 is a typical structural diagram of an electric motor.

Referring to this, in a conventional electric motor, a fixed part is called a stator, and a rotating part is called a rotor. It is common that the field 10 is a stator and the armature 20 is a rotor.

As the main parts of the electric motor, there are a field 10, an armature 20, a commutator 30, a brush 40, and the like, as shown by reference parts in FIG. 1 .

The field 10 is also referred to as a field magnet, and is responsible for generating a main magnetic flux.

The field 10 interacts with the armature 20 to construct a magnetic circuit, and the armature 20 receives the magnetic flux created by the field 10 to obtain rotational force.

Since the magnetic field 10 only needs to generate a required magnetic flux, a current flows relatively less than the armature 20, and a permanent magnet or an electromagnet is used to create a magnetic flux. 1 is an example using a permanent magnet.

At this time, if the magnetic field 10 is applied as a permanent magnet as shown in FIG. 1 , there is an advantage that magnetic flux can be generated without a separate winding. However, it also includes a problem in that it is difficult to control the speed because the magnetic flux cannot be controlled.

The armature 20 is also called an armature and generates a torque through Fleming's left hand rule by breaking the magnetic flux generated by the field 10 .

When power is supplied to the motor, the motor rotates. At this time, the armature 20 is where the current of the power flows.

Since the armature 20 is a place where the supplied current flows directly, the larger the capacity, the thicker and more complex the design.

The commutator 30 is also referred to as a commutator, and converts a DC current coming from the outside into an AC current to supply power to the rotating unit.

The reason for converting direct current into alternating current is that the motor rotates only when the direction of the current changes frequently and the force according to Fleming's left hand rule changes frequently.

The changed alternating current is supplied to the armature 20 . Since the commutator 30 is connected to the armature 20, when the armature 20 rotates, it rotates together.

The rotating commutator 30 is in contact with the brush 40 in a stationary state. The brush 40 is a part that contacts the commutator 30 and connects the internal circuit and the external circuit of the motor.

Types of the brush 40 include a carbon brush, a graphite brush, an electric graphite brush, and a metal graphite brush.

On the other hand, the amount of magnetic flux formed in the electric motor as shown in FIG. 1 means the sum of the effective magnetic flux amount and the leakage magnetic flux amount. It can perform the role of the field 10 by the effective magnetic flux amount.

As described above, the effective magnetic flux means the total number of lines of magnetic force returning to the opposite pole through the coil wound around the slot of the armature 20 among many lines of magnetic force from one pole of the magnet.

No matter how large the amount of magnetic flux emitted from the permanent magnet, which is the field 10, is small, if the effective magnetic flux passing through the coil in the corresponding slot of the armature 20 and returning to the opposite pole is small, the remaining amount of magnetic flux is lost. Making the effective magnetic flux amount can be economical and efficient use of magnets in the motor.

In other words, in order to maximize the design efficiency of the motor, the design should be done in consideration of leakage prevention as well as the precise calculation of the effective magnetic flux when designing the motor.

In particular, it is very important to manage torque, RPM, or Ampere in an electric motor.

In order to manage each of these characteristics, it is necessary to carefully review and manage the residual magnetic flux density (Br), coercive force (iHc, bHc), and maximum energy product (BHmax) among the characteristics of magnets. The need for a new concept electric motor is emerging.

Korean Intellectual Property Office Application No. 10-2011-0025105

An object of the present invention is to enable efficient lot management of magnets so that the characteristics of the motor are stabilized through effective magnetic flux control, and deviation depending on the lot, which is a factor that destabilizes the characteristics of the motor. Through the clustering of permanent magnets, it is possible to easily control the changes in the characteristics of the magnet and the residual magnetic flux density (Br) that may occur, and to predict and manage a certain effective magnetic flux amount, which can significantly increase the efficiency of the motor compared to the prior art. An object of the present invention is to provide a high-efficiency motor capable of controlling effective magnetic flux.

Another object of the present invention is to provide a high-efficiency electric motor capable of maximizing the permeance coefficient and capable of controlling the effective magnetic flux through clustering of permanent magnets.

The object is to be disposed on the radially outer side of the armature, a permanent magnet made of an annular sector plate (Annular sector plate); a plurality of permanent magnet insertion holes manufactured to cluster the permanent magnets in a slot shape; and a permanent magnet support module configured to integrally configure the plurality of permanent magnet insertion holes and support the permanent magnet, but perform a function capable of predictive management by measuring the effective magnetic flux amount, Clustering of permanent magnets It is achieved by a high-efficiency motor capable of controlling effective magnetic flux through

The permanent magnet, the outer surface curved portion; an inner curved portion disposed inside the outer curved portion in a radial direction and having a smaller area than the outer curved portion; a pair of side connecting portions connecting the outer curved portion and the inner curved portion from both sides; and a pair of inclined end connecting portions for obliquely connecting the outer curved portion and the inner curved portion at both ends.

The permanent magnet may be selected from a ferrite magnet, an Sm-Co-based magnet, an Nd-Fe-B-based magnet, and an Sm2Fe17Nx-based magnet.

The permanent magnet insertion hole is made of an annular sector plate that is easy to insert the permanent magnet in the form of a slot, and the permanent magnet insertion hole has a structure that can prevent the permanent magnet from being separated and clustered. can be formed with

The permanent magnet support module may be manufactured in a two-pole or more multi-pole type.

According to the present invention, efficient lot management of magnets is possible so that the characteristics of the motor are stabilized through effective magnetic flux control, and deviations may occur depending on the lot, which is a factor that makes the characteristics of the motor unstable. It is possible to easily control the characteristics of the magnet and the change of the residual magnetic flux density (Br), and it is possible to predict and manage a certain effective magnetic flux amount, so that the efficiency of the motor can be significantly increased compared to the conventional one.

In addition, according to the present invention, there is an effect of maximizing the permeance coefficient.

1 is a typical structural diagram of an electric motor.
2 is a structural diagram of a high-efficiency electric motor capable of controlling effective magnetic flux through clustering of permanent magnets according to an embodiment of the present invention.
3 is a view for explaining a permanent magnet and a permanent magnet support module.
4 is an enlarged view of a permanent magnet.
5 is data obtained by measuring the amount of surface magnetic flux using a Gauss meter by dividing the inner surface of the magnet into parts.
6 shows the measurement of surface magnetic flux at nine points (a, b, c, d, e, f, g, h, i) of the N and S poles, respectively, using two magnets as samples.
7 is a BH curve and a measurement site for calculating a permeance coefficient.
8A to 13 are views illustrating various modifications of the present invention.
14 to 18 are various modifications of the permanent magnet, the permanent magnet support module, and the permanent magnet insertion hole.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them.

However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiment described in the text.

For example, the embodiment is capable of various changes and may have various forms, so it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea.

In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

In the present specification, the present embodiment is provided so that the disclosure of the present invention is complete, and to fully inform those of ordinary skill in the art to which the present invention belongs, the scope of the invention. And the invention is only defined by the scope of the claims.

Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques have not been specifically described to avoid obscuring the present invention.

Meanwhile, the meaning of the terms described in the present invention is not limited to the dictionary meaning, and should be understood as follows.

When a component is referred to as being “connected” to another component, it may be directly connected to the other component, but it should be understood that another component may exist in between. On the other hand, when it is mentioned that a certain element is "directly connected" to another element, it should be understood that the other element does not exist in the middle. Meanwhile, other expressions describing the relationship between elements, that is, “between” and “immediately between” or “neighboring to” and “directly adjacent to”, etc., should be interpreted similarly.

The singular expression is to be understood as including the plural expression unless the context clearly dictates otherwise, and terms such as "comprises" or "have" refer to the specified feature, number, step, action, component, part or these It is intended to indicate that a combination exists, and it is to be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined.

Terms defined in general used in the dictionary should be interpreted as having the meaning consistent with the context of the related art, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the embodiment, the same reference numerals are assigned to the same components, and descriptions of the same reference numerals will be omitted in some cases.

(one embodiment)

2 is a structural diagram of a high-efficiency electric motor capable of controlling effective magnetic flux through clustering of permanent magnets according to an embodiment of the present invention, FIG. 3 is a view for explaining a permanent magnet and a permanent magnet support module, FIG. 4 is An enlarged view of a permanent magnet, FIG. 5 is data obtained by dividing the inner surface of the magnet by parts and measuring the amount of surface magnetic flux with a Gauss meter. The surface magnetic flux amount of the point (a, b, c, d, e, f, g, h, i) is measured, and FIG. 7 is a B-H curve and a measurement site for calculating the permeance coefficient.

Referring to these drawings, according to this embodiment, efficient lot management of magnets is possible so that the characteristics of the motor are stabilized through effective magnetic flux control, and the lot (a factor that makes the characteristics of the motor unstable) ( Lot), it is possible to easily control the characteristics of the magnet and the change in the residual magnetic flux density (Br), which may vary depending on the lot), and it is possible to predict and manage a constant effective magnetic flux amount, so that the efficiency of the motor can be significantly improved compared to the prior art.

2 to 4, the electric motor of this embodiment is disposed on the radially outer side of the armature 20, a permanent magnet 100 made of an annular sector plate (Annular sector plate), and a permanent magnet 100 A plurality of permanent magnet insertion holes 200 and a plurality of permanent magnet insertion holes 200 manufactured for clustering to be inserted in a slot shape are integrally configured to support the permanent magnet 100, but measure the effective magnetic flux. It may include a permanent magnet support module 300 that performs a predictive management possible function.

The configuration and description of the armature 20 , the commutator 30 and the brush 40 in FIG. 2 are replaced with the description of FIG. 1 .

In the electric motor of this embodiment having such a configuration, the permanent magnet 100 may be manufactured as an annular sector plate.

That is, in this embodiment, the permanent magnet 100 has a structure with a high permeance coefficient at the edge and a relatively low permeance coefficient at the center, so an annular sector plate having a structure that can secure effective magnetic flux. ) is made with

The permanent magnet 100 includes an outer curved portion 111 and an inner curved portion 112 disposed on the radially inner side of the outer curved portion 111 and having a smaller area than the outer curved portion 111, and an outer curved portion 111 ) and a pair of side connecting portions 113 for connecting the inner curved portion 112 from both sides, and a pair of inclined end connecting portions 114 for obliquely connecting the outer curved portion 111 and the inner curved inner surface portion 112 from both ends. ) may be included.

In this embodiment, the permanent magnet 100 may be selected from a ferrite magnet, an Sm-Co-based magnet, an Nd-Fe-B-based magnet, an Sm2Fe17Nx-based magnet, and the like. It can be used to manufacture the permanent magnet 100 .

Here, the permeance coefficient has a similar meaning to the amount of magnetic flux, meaning that the amount of magnetic flux on the peripheral side is higher than that of the center of the magnet.

As a conventional method for increasing the permeance coefficient, the air gap in the motor is reduced as much as possible, the material of the armature and the housing of the motor is used as low as possible in magnetic resistance, or the thickness of the housing (yoke) is used. It is a method to eliminate leakage magnetic flux by increasing

The permanent magnet support module 300 supports the permanent magnet 100 . The permanent magnet support module 300 may be formed in a cylindrical shape, such as a conventional stator or rotor.

The permanent magnet support module 300 is made of a material close to pure iron or a non-magnetic material with low magnetic resistance to prevent leakage of magnetic flux out of the permanent magnet support module 300 to prevent magnetic flux leakage of the permanent magnet 100 . It can be manufactured or manufactured in a way that adjusts its own thickness.

A plurality of permanent magnet insertion holes 200 are formed in the permanent magnet support module 300 . The permanent magnet 100 is inserted into the permanent magnet insertion hole 200 .

The permanent magnet insertion hole 200 is made of an annular sector plate that is easy to insert the permanent magnet 100 in the form of a slot.

In addition, the permanent magnet insertion hole 200 may be formed in a structure capable of clustering the plurality of permanent magnets 100 and preventing them from being separated. For example, the permanent magnet insertion hole 200 may be formed in a structure that does not fall out in the direction in which the permanent magnet 100 is inserted.

The permanent magnet support module 300 into which the plurality of permanent magnets 100 are inserted may perform a function capable of predictive management by measuring the effective magnetic flux amount. The permanent magnet support module 300 may be manufactured in a bipolar or multipole type.

In summary, the electric motor of this embodiment is a permanent magnet 100 made of an annular sector plate, a plurality of permanent magnets manufactured for clustering so that the permanent magnet 100 can be inserted in a slot shape. The hole 200 and the plurality of permanent magnet insertion holes 200 may include a permanent magnet support module 300 integrally configured.

Predictive management by measuring effective magnetic flux is a very convenient method for both magnet users and magnet suppliers. This is because, when the characteristics of the motor are stabilized, efficient lot management of magnets becomes possible.

For reference, the characteristics of the magnet may vary depending on the lot, and in the case of the residual magnetic flux density (Br), there may be a characteristic change of about 3 to 4%. Since the deviation of effective magnetic flux is very large when properly managed, it acts as a factor that makes the characteristics of the motor unstable.

In such a situation, in order to stably manage the characteristics of the motor, it is always necessary to manage it so that a constant effective magnetic flux is produced. management becomes possible.

Accordingly, the permanent magnet support module 300 into which the plurality of permanent magnets 100 are inserted can be usefully utilized through a plus meter during repair or maintenance from the design of the motor.

For example, if the magnetic flux tolerance is tightly managed, such as 0.10, it is equivalent to giving up the motor performance management by the effective magnetic flux. This is because it is not easy for a magnet supplier to adjust the effective magnetic flux by changing the thickness (permeance coefficient due to air gap) within such a tight tolerance range.

Referring to FIGS. 5 and 6 , it can be seen that the amount of magnetic flux on the peripheral side of the magnet is higher than that of the center.

This phenomenon appears higher as the shortest distance from the measurement site to the opposite pole is shorter.

This is a phenomenon that comes from the difference in permeance coefficients, and it can be seen that more magnetic flux comes out in the area where the permeance coefficient is large, and the permeance coefficient becomes larger as the shortest distance from the measurement area to the opposite pole is shorter.

The permeance coefficient is a value determined by the material, shape, size, and magnetic field direction of the magnet. Even with the same magnet, the surface Gaussian is not constant depending on the position of the magnet surface.

A larger permeance coefficient produces more magnetic flux, and the shorter the permeance coefficient is, the shorter the shortest distance from the measurement area to the opposite pole.

A plurality of permanent magnets 100 according to the present invention may be manufactured as an annular sector plate to perform a function of maximizing the permeance coefficient.

Meanwhile, the permeance coefficient refers to a value obtained by dividing the magnetic flux density B by the coercive force Hc. Permeance coefficient is a very important factor, and it is a value determined according to the material, shape, size, and magnetic field direction of the magnet.

This numerical value calculates the operating point, obtains the operating point magnetic flux density (Bd), and calculates the magnetic flux amount (Φ: Maxwell).

The operating point (permeance coefficient) is Pc = √π . The value is calculated as √S/2 x Lm/Am, and the operating point surface magnetic flux density is calculated as Bd = Br x Pc/ ( Pc + μr ) (Gauss). The total magnetic flux is calculated as Φo = Bd x Am(Maxwell).

Here, S is the total surface area, Am is the magnet cross-sectional area orthogonal to the magnetization direction, Lm is the length in the magnetization direction, and μr is the reversible magnetic permeability. That is, the higher the permeance coefficient, the higher the total magnetic flux amount.

Referring to FIG. 7 , assuming that the measured result using a Gauss meter in the magnetized magnet as in a in (a) was 1,200 gauss at point A and 1300 gauss at point B, the magnetic force line actually from point B is Since the shortest distance of the air gap returning to the opposite S pole is shorter than the magnetic force line from point A as short as L1, of course, the Gaussian measurement shows that point B, which is close to the opposite pole, is larger than point A.

At this time, the permeance coefficient (magnetic flux density B / coercive force Hc) of point A becomes B/Hc of point A where the B-H curve meets 1,200 gauss in (B).

If the straight line connecting the origin and point A becomes the permeance line at the magnet point A, and the Hc value that meets vertically down from point A is 2750oe, then the permeance coefficient at this time is B/Hc, so 1,200 gauss / 2,750 oe = It becomes 0.436. If we calculate the permeance coefficient at the magnet point B in the same way, it becomes 1,300gauss / 2,600oe = 0.50.

If the planes are very close to each other so that they face in parallel as in FIG. 7(A), the distance (air gap) from the point A or point B to the opposite pole becomes the same (L3).

In addition, because it is very short, the surface Gaussian of points A or B appears to be the same and large.

If the measured values at both points are 2,500G, then the permeance (B/Hc) PA and PB of points A and B at this time are the same, and the value is 2,500 G / 1,450 oe, which is 1.72.

Even with the same magnet, the surface Gaussian is not constant depending on the position of the magnet surface, which is caused by the difference in the shortest distance with the opposite pole. In other words, in order to increase the permeance coefficient, it is possible to simply reduce the air gap with the opposite pole.

The permanent magnet 100 made of the annular sector plate of the present invention is a structure for increasing the permeance coefficient, and by clustering a plurality of permanent magnets 100 without using a method such as lamination, the electric motor It is possible to increase the permeance coefficient without affecting the volume or structure of the

According to this embodiment, which operates based on the structure as described above, efficient lot management of magnets is possible so that the characteristics of the motor are stabilized through effective magnetic flux control, and the characteristics of the motor are unstable. It is possible to easily control changes in the characteristics of magnets and residual magnetic flux density (Br) that can cause deviations depending on the lot, which is a factor in can be raised

In addition, according to the present embodiment, the permeance coefficient can be maximized.

(variant example)

8A to 13 are views illustrating various modifications of the present invention.

First, referring to the embodiment of FIGS. 8A and 8B , even in this embodiment, the permanent magnet 500 is inserted into the permanent magnet insertion hole 700 of the permanent magnet support module 600 to improve the characteristics of the motor. It plays a role in stabilization.

The structure, function, and role of the permanent magnet 500 may be the same as in the above-described embodiment.

However, in the present embodiment, the permanent magnet 500 is formed with a slot 510 for preventing separation. And, the separation prevention projection 710 is formed on the inner wall of the permanent magnet insertion hole 700 to correspond to the separation prevention slot 510 of the permanent magnet 500 .

Accordingly, when the permanent magnet 500 is inserted into the corresponding position as shown in the figure, the separation prevention slot 510 of the permanent magnet 500 is inserted into the separation prevention protrusion 710 formed on the inner wall of the permanent magnet insertion hole 700 . It can be customized, and it is possible to prevent the permanent magnet 500 from being arbitrarily separated by its action.

Next, referring to the embodiment of FIGS. 9A and 9B , even in this embodiment, the permanent magnet 500a is inserted into the permanent magnet insertion hole 700a of the permanent magnet support module 600a, so that the characteristics of the motor are improved. It plays a role in stabilization.

On the other hand, in the case of the present embodiment, the permanent magnet (500a) for preventing separation (510a) is formed. At this time, the projection 510a for preventing separation is provided with an inclined inclined surface 511, so that the permanent magnet 500a can be easily entered toward the permanent magnet insertion hole 700a.

And, the separation prevention slot 710a is formed in the inner wall of the permanent magnet insertion hole 700a to correspond to the separation prevention protrusion 510a of the permanent magnet 500a. The cross-sectional shape of the separation preventing slot 710a may be the same as the cross-sectional shape of the separation preventing protrusion 510a.

Accordingly, when the permanent magnet 500a is inserted into the corresponding position as shown in the drawing, the separation prevention protrusion 510a of the permanent magnet 500a is inserted into the separation prevention slot 710a formed on the inner wall of the permanent magnet insertion hole 700a. It can be customized, and it is possible to prevent the permanent magnet 500a from being arbitrarily separated by its action.

Next, referring to the embodiment of FIGS. 10A and 10B , even in this embodiment, the permanent magnet 500b is inserted into the permanent magnet insertion hole 700b of the permanent magnet support module 600b, so that the characteristics of the motor are improved. It plays a role in stabilization.

On the other hand, in the case of this embodiment, the permanent magnet (500b) is formed with a slot (510b) for preventing separation. And, the separation prevention protrusion 710b is formed on the inner wall of the permanent magnet insertion hole 700b to correspond to the separation prevention slot 510b of the permanent magnet 500b.

In this case, the permanent magnet 500b having the separation preventing slot 510b takes a form in which the width is gradually narrowed from the rear end 520 to the front end 530 . In other words, the area of the front end 530 is smaller than the area of the rear end 520 . Accordingly, the assembly of the permanent magnet 500b becomes very easy.

Accordingly, when the permanent magnet 500b is inserted at the corresponding position as shown in the drawing, the separation prevention slot 510b of the permanent magnet 500b is inserted into the separation prevention protrusion 710b formed on the inner wall of the permanent magnet insertion hole 700b. It can be fitted, and it is possible to prevent the permanent magnet 500b from being arbitrarily separated by its action.

Next, referring to the embodiment of FIGS. 11A to 11C , even in this embodiment, the permanent magnet 500c is inserted into the permanent magnet insertion hole 700c of the permanent magnet support module 600c, so that the characteristics of the motor are improved. It plays a role in stabilization.

Meanwhile, in the present embodiment, the permanent magnet 500c takes a form in which the width is gradually narrowed from the rear end 520c to the front end 530c. In other words, the area of the front end 530c is smaller than the area of the rear end 520c. Accordingly, the assembly of the permanent magnet 500c becomes very easy.

The permanent magnet insertion hole 700c is machined to counteract the permanent magnet 500c, and a stopper 620 is formed at the end of the permanent magnet support module 600c in which the permanent magnet insertion hole 700c is located. Accordingly, the front end 530c of the permanent magnet 500c may be inserted only up to the stopper 620 .

In addition, a separate magnet separation prevention cover 640 is additionally coupled to the permanent magnet support module 600c to prevent separation of the rear end of the permanent magnet 500c inserted into the permanent magnet insertion hole 700c.

Accordingly, when the permanent magnet 500c is inserted into the corresponding position as shown in the figure, the front end 530c of the permanent magnet 500c is stopped in contact with the stopper 620, and then the magnet separation prevention cover 640 is installed with the permanent magnet By coupling to the support module (600c), it is possible to finish the fixing operation of the permanent magnet (500c).

Next, referring to the embodiment of FIGS. 12 and 13 , even in this embodiment, permanent magnets 500 and 500d are inserted into the permanent magnet insertion hole 700d of the permanent magnet support module 600d, and the characteristics of the motor It plays a role in stabilizing it.

In this case, in the present embodiment, the width L of the permanent magnet insertion hole 700d is larger than that of the above-described embodiments. That is, the permanent magnet insertion hole 700d provided in this embodiment may have the same width as in the above-described embodiments, or may have a large width L as in the present embodiment.

As such, when the width L of the permanent magnet insertion hole 700d is large, there are several, for example, two first and second permanent magnets 500 and 500d, instead of one, in the permanent magnet insertion hole 700d as in the above-described embodiments. Assemble and connect and insert.

At this time, one of the first and second permanent magnets 500 and 500d has at least one separation preventing slot 510 is formed, and the other is formed with a slot protrusion 515 fitted therein, so the separation preventing slot 510 is formed. In a state in which the first and second permanent magnets 500 and 500d are connected as one body by using and the slot protrusion 515 , these are inserted and coupled to the permanent magnet insertion hole 700d. On the inner wall of the permanent magnet insertion hole 700d, a projection 710 for preventing separation is formed to correspond to the slot 510 for preventing separation.

Accordingly, as shown in the drawing, after assembling the first and second permanent magnets 500 and 500d into one body, the slot 510 for preventing separation of the first and second permanent magnets 500 and 500d is inserted into the permanent magnet insertion hole 700d. Can be fitted to the separation prevention projection 710 formed on the inner wall of the first and second permanent magnets 500 and 500d can be prevented from being arbitrarily separated by this action.

14 to 18 are various modifications of the permanent magnet, the permanent magnet support module, and the permanent magnet insertion hole.

In the case of the above-described embodiment, most of the permanent magnet 100 was manufactured in a rectangular cross-sectional structure.

However, as shown in FIGS. 14 to 18 , the permanent magnets 900a to 900e may be variously deformed such as rhombic, triangular, pentagonal, hexagonal or octagonal, and corresponding permanent magnet support modules 800a to 800e. The permanent magnet insertion holes 700a to 700e of the can also be variously deformed, such as a rhombus, a triangle, a pentagon, a hexagon, or an octagon.

Of course, it may be manufactured in various polygonal shapes not shown, and it should be said that all of these items fall within the scope of the present invention.

As such, the present invention is not limited to the described embodiments, and it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, it should be said that such modifications or variations fall within the scope of the claims of the present invention.

20: armature 30: commutator
40: brush 100: permanent magnet
200: permanent magnet insertion hole 300: permanent magnet support module

Claims (5)

delete Permanent magnets arranged on the radially outer side of the armature made of an annular sector plate (Annular sector plate);
a plurality of permanent magnet insertion holes manufactured to cluster the permanent magnets in a slot shape; and
A permanent magnet support module configured to integrally configure the plurality of permanent magnet insertion holes and support the permanent magnet, but perform a function capable of predictive management by measuring effective magnetic flux,
The permanent magnet is
external curved portion;
an inner curved portion disposed inside the outer curved portion in a radial direction and having a smaller area than the outer curved portion;
a pair of side connecting portions connecting the outer curved portion and the inner curved portion from both sides; and
A pair of inclined end connecting portions for obliquely connecting the outer curved portion and the inner curved portion at both ends,
A slot for preventing separation is formed in the permanent magnet, and a projection for preventing separation is formed in an inner wall of the permanent magnet insertion hole to correspond to the slot for preventing separation of the permanent magnet, or a projection for preventing separation is formed on the permanent magnet, and inserting the permanent magnet A slot for preventing separation is formed in the inner wall of the hole to correspond to the projection for preventing separation of the permanent magnet, and the projection for preventing separation (510a) is characterized in that it has an inclined inclined surface (511), through the clustering of the permanent magnet High-efficiency motor with effective magnetic flux control.
3. The method of claim 2,
A high-efficiency electric motor capable of controlling effective magnetic flux through clustering of permanent magnets, characterized in that the permanent magnet is selected from among ferrite magnets, Sm-Co-based magnets, Nd-Fe-B-based magnets, and Sm2Fe17Nx-based magnets.
3. The method of claim 2,
The permanent magnet insertion hole is made of an annular sector plate that is easy to insert the permanent magnet in the form of a slot,
The permanent magnet insertion hole is a high-efficiency electric motor capable of effective magnetic flux control through the clustering of the permanent magnet, characterized in that formed in a structure that can prevent the permanent magnet from being separated and clustered.
3. The method of claim 2,
A high-efficiency electric motor capable of controlling effective magnetic flux through clustering of permanent magnets, characterized in that the permanent magnet support module is manufactured in a bipolar or more multipole type.

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