WO2017039066A1 - Electromagnet having multi-core structure - Google Patents

Abstract

The present invention relates to an apparatus for preventing blockage of a slurry pump formed such that a concentration of solid particles does not exceed a threshold value so as to prevent the occurrence of blockage in a slurry pump, and an electromagnet for generating a magnetic field by winding a coil around a core comprising: a support for supporting the electromagnet; a plurality of winding cores formed by winding coils around cores, and comprising at least three winding cores having magnetic poles when a voltage is applied to the coils through an electrode terminal for supplying the power to the electromagnet; a pair of magnetic flux hubs formed to be supported by the support and to symmetrically face each other, mechanically coupling the plurality of winding cores, and concentrating the magnetic field to be generated from the plurality of winding cores; and a pair of magnetic pole cores having polarity caused by the magnetic field concentrated by the pair of magnetic flux hubs, and supported so as to symmetrically face each other in a state in which the cores are coupled to the magnetic flux hubs, and thus the electromagnet reduces an electrical and magnetic resistance, and has high efficiency on the basis of a Halbach array so as to reduce power consumption.

Description

[Name of invention given by ISA under Rule 37.2] 전자 Electromagnet having a multi-core structure

The present invention relates to a high-efficiency electromagnet having a multi-core structure, and more particularly, to at least three cores, at least one magnetic flux hub, and a magnetic pole in an electromagnet generating a magnetic field by winding a coil in the core. The present invention relates to a high efficiency electromagnet having a multi-core structure that improves efficiency by concentrating generated magnetic flux with one magnetic flux hub.

In general, the electromagnet is operated by the ampere's law when the current flows through the circular coil, and the winding core located inside the coil exhibits the properties of the magnet.

The intensity of the electromagnet is proportional to the number of coil turns N and the current I flowing. Therefore, in order to obtain a large magnetic field with a constant current, it is common to increase the number of coil turns (H∝μ × NI). Where μ represents the magnetic permeability and N is Number of turns per unit length, where I is Indicates current.

Increasing the number of turns N of the coil in a limited space increases the thickness of the coil layer and increases the electrical resistance as the length of the coil increases rapidly in proportion to the increasing thickness of the coil layer. Power consumption (heat generation) increases rapidly. Therefore, to obtain a large magnetic field with the same current, high permeability core materials and low resistance coil materials are used. This research led to the development of high magnetic permeability (μ) alloy materials, such as iron-based nickel zinc alloys and iron-based cobalt zinc. However, these studies have reached the limits of the performance of low resistivity materials and high permeability materials.

In addition, since the electrical resistance of the copper coil is a heat generating source, it is impossible to avoid the heat generation itself. Generally, a cooling method is used. In the cooling method, a coil with a hollow that can flow cooling water for suppressing heat generation can be used. In this case, the hollow formed coil has a problem that it is difficult to increase the number of windings because the thickness is thick.

By using a foil-type coil and not using a coil with a hollow, it is manufactured in a pancake structure, so that the thermal conductivity is improved by increasing the contact area between the winding layers, and thus the cooling can be improved. Such a pancake structure reduces the volume of the winding part by reducing the volume of the cooling part and reduces the magnetic resistance by reducing the length of the magnetic closure circuit. However, the fancake structure using the foil-type coil also has a problem in that as the size of the winding portion increases, the size of the cooling portion increases so that the length of the magnetic circuit surrounding the winding portion increases.

A superconducting magnet using superconducting wire without electric resistance has been developed to obtain the ultra high magnetic field. However, the electromagnet using a supersonic magnet has a limit that can be operated only below a critical temperature converted to superconductivity, and also has a problem in that operating costs increase rapidly because a vacuum coolant tank or a refrigerator must be provided.

In addition, a thick coil is used to obtain a large magnetic field with the same current, and there is a method of increasing the coil turn number (N). However, increasing the coil turn number (N) increases the volume of the electromagnet and increases the manufacturing cost. Due to the increase in weight and volume, there is a problem of additionally increasing logistics costs, installation costs and management costs.

1 is a view showing a cross section of a general electromagnet. Referring to FIG. 1, when the radius r _C of the winding core 1 is increased to accommodate a large amount of magnetic flux, the outer diameter thereof is increased to increase the resistance R _coil of the coil 2.

In addition, the length of the path that induces magnetic flux to accommodate a coil with a large coil radius (r _coil = t _CL + r _C ) increases, thus increasing magnetic resistance and eventually outputting the same power. Decreases the efficiency of the magnetic field. Here, t _CL represents the thickness of the coil layer 2.

2 is a graph showing the tendency of electrical magnetic resistances appearing in a general electromagnet.

2 (a) is a graph showing the resistance of the coil with increasing coil layer thickness. As shown in FIG. 1, when the radius r _C of the core 1 is increased to accommodate a large amount of magnetic flux, the resistance of the coil 2 increases. This can be represented by the formula R _coil = R _w / L + L _total , and the resistance of the coil 2 increases rapidly. Here, R _coil represents the resistance of the coil 2, R _w / L represents the resistance per length of the coil 2, L _total is the resistance of the entire coil (2).

The resistance of the entire coil 2 can be represented by the following equation (1).

2 (b) is a graph showing the amount of power increase as the thickness of the coil layer increases. When the number of turns N of the coil increases in a limited space, the thickness of the coil 2 increases, and the electrical resistance increases in proportion to the increased thickness of the coil 2, thereby rapidly increasing the power consumption (heating). do.

2 (c) is a graph showing the length of the magnetic flux path as the coil layer thickness increases. As the thickness of the coil 2 increases, the coil radius r _coil = t _CL + r _C increases, and correspondingly, the magnetic flux path 1 increases.

2D is a graph showing magnetoresistance with increasing magnetic flux path. As shown in (c) of FIG. 2, as the magnetic flux path 1 increases, magnetic resistance increases (R _m = l / μS), eventually increasing the magnetoresistance causes the output magnetic field to drop in power. Where S is the cross-sectional area of the magnetic flux path.

Therefore, the magnetic field performance of the electromagnet can be improved by increasing the number of turns of the electromagnet and increasing the radius of the magnetic pole core, but the efficiency of the electromagnet is lowered. As a result, the power consumption, manufacturing cost, and distribution cost are increased. A problem occurs.

3 is a cross-sectional view of a coil wound around a common core. The magnetic flux density output is important for the stimulus, but the total flux produced by the core is important for the core. The total magnetic flux is the most important variable in the cross-sectional area of the core, and the coil winding amount or the thickness t _CL of the coil winding layer is also an important variable. The larger the cross-sectional area of the core and the more coil windings, the higher the total flux. However, it is not preferable that the thickness of the coil layer is infinitely thick in terms of the magnetic field (H) efficiency (H / P) relative to the power (P) and may cause a heat generation problem.

In order to realize a multi-core electromagnet, the sum of the core diameter (D _core ) and the coil layer thickness (t _CL ), that is, the coil outer diameter (2t _CL) Smaller + D _core ) is advantageous. However, if the core is too thin, the magnetic saturation reaches a small amount of current, making it difficult to reach the target total magnetic flux.

In addition, since the change of the winding core is limited once the existing electromagnet is manufactured, it requires a serious change to the existing electromagnet or a new electromagnet production at all. In particular, if a winding core with a hollow is required, it may be possible to form a hollow in the existing winding core, but may encounter a problem in that the gap between poles cannot be adjusted.

In addition, the angle of inclination is not variable in the protruding inclined structure for converging the magnetic field at the magnetic pole to improve the strength of the magnetic field, that is, in the tapered shape. Not only is it impossible to change the inclination angle, but there is a problem in that the inclined structure and the inclined structure that protrude according to the intended use have to be manufactured separately.

Accordingly, the present invention has been made to solve the conventional problems as described above, and an object of the present invention is to reduce the electrical and magnetic resistance, and to reduce power consumption, a multi-core structure based on a Halbach array. To provide a high efficiency electromagnet having a.

It is also an object of the present invention to provide an electromagnet having a multi-core structure that can dissipate power consumption in a multi-core structure and simplify the cooling method.

In addition, an object of the present invention is to provide an electromagnet having a multi-core structure that can reduce the number of coil turns in the multi-core structure to reduce the electrical resistance.

In addition, an object of the present invention is to provide the ability to accommodate the multi-core to the components (magnetic flux core) generated in the improved magnetic circuit structure, to perform the cooling function and to exchange the magnetic poles efficiency It is to provide a high efficiency electromagnet having a multi-core structure with increased.

In addition, an object of the present invention is to provide a high-efficiency electromagnet having a multi-core structure to improve the magnetism only by changing the structure by reducing the magnetic resistance by designing the winding core structure to increase the center thickness of the winding core using a ferromagnetic foil will be.

It is also an object of the present invention to provide a highly efficient electromagnet having a multi-core structure with an improved magnetic circuit structure by designing a simplified structure by thinning the winding layer.

According to the present invention for achieving the above object, a high-efficiency electromagnet having a multi-core structure, at least three or more to generate a magnetic field when the coil is wound around the core and the voltage is applied to the coil through the electrode terminal A plurality of winding core consisting of; A pair of magnetic flux hubs configured to be symmetrical to face each other and to combine the plurality of winding cores to focus a magnetic field generated in the plurality of winding cores; And a pair of magnetic pole cores having a polarity by a magnetic field focused from the pair of magnetic flux hubs and symmetrically facing each other in a coupled state to the magnetic flux hubs, wherein the plurality of magnetic flux hubs comprise: A plurality of core receiving portion for receiving the winding core; A magnetic pole accommodating part configured to be provided inside the plurality of core accommodating parts to accommodate the magnetic pole cores; And a cooling unit configured to be formed outside or inside the magnetic flux hub to cool heat generated by the coil wound on the winding core, wherein the edge of the magnetic flux hub is configured in the form of chamfering (edge cutting, chamfering). do.

The plurality of winding cores may be configured to surround the magnetic pole cores and may be coupled to the magnetic flux hub such that axes of magnetic flux directions passing through the winding cores are parallel to each other.

The stimulus accommodating part includes: a stimulation tube configured to receive the stimulation core and have a barrel shape; A mounting adapter configured to receive the magnetic pole tube and couple the magnetic core to the magnetic flux hub; And a magnetic pole cover covering the magnetic pole tube and the magnetic pole core, and the mounting adapter and the magnetic pole cover coupled to the magnetic pole tube.

The magnetic pole core may be configured to accommodate a cross-sectional area of the magnetic pole core that satisfies the following equation.

(S _c × m) / 2 <C

Where S _c represents the cross-sectional area per core, m represents the number of cores, and C is the contact area between the magnetic flux hub and the magnetic poles.

The magnetic pole core may be configured such that the cross-sectional area of the magnetic pole core satisfies the following equation.

(S _c × m)> C

Where S _c represents the cross-sectional area per core, m represents the number of cores, and C is the cross-sectional area of the magnetic pole core.

The magnetic flux hub may be configured such that the thickness of the magnetic flux hub satisfies the following equation.

r _c <T _FH

Where r _c is the radius of the magnetic core and T _FH is the thickness of the magnetic flux hub.

The plurality of cores may be configured differently from the diameter of the central portion and the diameter of both ends, the diameter of the central portion may be configured larger than the diameter of the end.

The diameter of the central portion and the diameter of the both ends may be configured to be within the range of the following equation.

1.1 <D _cc / D _ce <2

(Wherein D _cc represents the diameter of the center of the core and D _ce represents the diameter of the end of the core)

The plurality of winding cores may be configured such that a ratio of the length L _c of the central part to the length L _e of any one of the both ends is within the range of the following equation.

1 <L _c / L _e <3

The plurality of winding cores may be configured such that a ratio between the thickness T _CL of the coil wound on the core and the diameter D _{core of the core} is within the range of the following equation.

0.1 < (T _CL / D _core ) <1

The high efficiency electromagnet having a multi-core structure may be configured by winding the winding coil, and further including a cooling coil configured to form a hollow to flow a cooling fluid or cooling water.

The cooling coil may be disposed outside any one of the winding coil or between the coil and the core.

And a pedestal for supporting the pair of magnetic flux hubs, the pedestal comprising: a cooling fin configured to be in contact with the winding coil; It may be configured to include; and a cooling water or a cooling water coolant circulating the inside of the pedestal.

The pedestal further comprises a pair of side cooling jackets for holding a winding core in a state in which each side is supported on both sides, the side cooling jacket, the cooling fins are interpolated to the outside; And a coolant or a coolant circulating inside the side cooling jacket.

The pedestal may further include a coolant hub configured to divide each coolant inlet and outlet into a coolant circulating each winding core into a pair and collect them into one pair.

The side cooling jacket and the pedestal may be configured by filling any one of grease, copper plate and indium thin plate (foil) between the winding core.

The magnetic pole core has a cylindrical inner core; An outer core core configured to be rotatable with the inner core core and surrounding the inner core core; A magnetic pole handle fixed to one side of the inner core core to reciprocally adjust the inner core core back and forth; And an outer core stimulation handle fixed to an outer circumferential surface of the outer core to reciprocally adjust the outer core back and forth.

The magnetic pole core may be configured to protrude the inner core core than the outer core to obtain a focused magnetic field.

The magnetic pole core may be configured to protrude the outer core core than the inner core core to obtain a uniform magnetic field.

The magnetic pole core may be configured to remove the inner core from the outer core to form a hollow formed magnetic pole.

In the plurality of cores, an insulating film is formed between the coil wound around the core, and the insulating film may be formed of a material having insulation resistance and heat resistance.

The core accommodating unit may be coupled to the magnetic pole tube, the mounting adapter and the magnetic pole cover with screws to fix the magnetic flux hub, and the magnetic pole barrel, the mounting adapter, the magnetic pole cover, and the magnetic pole core may be detachable.

According to the present invention for achieving the above object, a high-efficiency electromagnet having a multi-core structure, the electromagnet for generating a magnetic field by winding a coil in the core, a support for the electromagnet; A coil wound around the core and configured to form a magnetic field when a voltage is applied to the coil through an electrode terminal for supplying power to the electromagnet; A pair of magnetic flux hubs supported by the pedestal and configured to face each other symmetrically and mechanically coupling the plurality of winding cores, and focusing a magnetic field generated in the winding cores; And a pair of magnetic pole cores supported in a connected state by the magnetic flux hub and disposed to face each other to have polarity by a magnetic field focused from the pair of magnetic flux hubs.

The plurality of winding cores may be configured to surround the magnetic pole cores and may be connected to each other such that an axis in a magnetic flux direction passing through the winding cores is disposed in parallel with the axis of the magnetic pole core.

The magnetic flux hub, a plurality of core receiving portion for connecting and receiving the plurality of winding cores; A magnetic pole accommodating part configured inside the plurality of core accommodating parts and accommodating magnetic poles; It may be configured to include; a cooling unit for cooling the heat generated by the coil wound on the core.

The cooling unit,

It may be configured to have a plurality of heat sinks formed to extend the contact surface with the air to the outside of the magnetic flux hub.

The cooling unit may be configured to form a passage of the cooling water circulating through the inside of the magnetic flux hub.

The pair of magnetic pole cores, the cylindrical housing coupled to the receiving portion formed inside the magnetic flux hub; A magnetic pole engaging with a screw thread formed inside the housing; And a magnetic pole handle formed at an end of the magnetic pole to adjust the distance between the magnetic poles by rotating the magnetic poles.

Electromagnet having a multi-core structure according to the present invention by the above solution has the effect of having a high efficiency based on a Halbach array in order to reduce the electrical and magnetic resistance, and to reduce the power consumption.

In addition, the electromagnet having the multi-core structure according to the present invention can accommodate the multi-cores in the components (magnetic flux cores) generated in the improved magnetic circuit structure, perform cooling functions, and exchange magnetic poles. It has the effect of increasing the efficiency by granting the functionality.

In addition, the electromagnet having a multi-core structure according to the present invention, by designing the winding core structure to increase the thickness of the center portion of the winding core using a ferromagnetic foil has the effect of improving the magnetism by only changing the structure by reducing the magnetic resistance.

In addition, the electromagnet having a multi-core structure according to the present invention has the effect of having an improved magnetic circuit structure by designing a simplified structure by thinning the winding layer.

In addition, the electromagnet having a multi-core structure according to the present invention, by providing a platform having a mounting adapter that can accommodate a variety of magnetic core to implement a magnetic core interchangeable electromagnet, there is an effect to increase the utilization and productivity.

1 is a cross-sectional view of a typical electromagnet.

Figure 2 is a graph showing the electric and magnetoresistance tendency of a typical electromagnet.

3 is a cross-sectional view of a coil wound around a common core;

Figure 4 is a conceptual diagram of an electromagnet having a structure of the triple core form according to an embodiment of the present invention.

5 is a conceptual diagram of an electromagnet having a structure of a quadruple core according to an embodiment of the present invention.

6 is a conceptual diagram of an electromagnet having a structure of a six-core form according to an embodiment of the present invention.

7 is a conceptual diagram of an electromagnet having a structure of a six-core form according to another embodiment of the present invention.

8 is a conceptual diagram of an electromagnet having a structure of an eight-core structure according to an embodiment of the present invention.

9 is a conceptual diagram of an electromagnet having a structure of a sixteen core form according to an embodiment of the present invention.

10 is a cross-sectional view showing a cross section of a winding core wound on a core according to the embodiment of FIG. 5 of the present invention;

11 is a perspective view and a partial perspective view showing a quad core electromagnet according to an embodiment of the present invention.

12 is a view showing a core accommodating part according to an embodiment of the present invention.

Figure 13 is a cross-sectional view showing a connection state of the core accommodating portion and the winding core according to an embodiment of the present invention.

14 is an assembled perspective view showing the assembled state of the magnetic flux hub and the magnetic pole core according to an embodiment of the present invention.

15 is a cross-sectional view for explaining a magnetic pole handle according to an embodiment of the present invention.

16 is a cross-sectional view showing a cooling apparatus of an electromagnet according to another embodiment of the present invention.

17 is a cross-sectional view showing a cooling jacket and a winding core according to an embodiment of the present invention.

18 is a perspective view showing an electromagnet constructed by FIG. 16 in accordance with an embodiment of the present invention.

19 is a perspective view showing an electromagnet according to another embodiment of the present invention.

20 is a graph showing indicators represented by a multi-core electromagnet in accordance with an embodiment of the present invention.

21 is a graph showing a change in the magnetic field of the multi-core electromagnet with the increase of the current applied to the magnetic coil according to an embodiment of the present invention.

22 is a perspective view showing a mounting adapter capable of mechanically receiving a magnetic pole core in the magnetic flux hub.

Hereinafter, with reference to the accompanying drawings showing an embodiment of the present invention will be described in more detail the present invention.

4 is a conceptual diagram of an electromagnet having a triple core structure according to an embodiment of the present invention, FIG. 5 is a conceptual diagram of an electromagnet having a quad core structure according to an embodiment of the present invention, and FIG. 6. Is a conceptual diagram of an electromagnet having a six-core structure according to an embodiment of the present invention, Figure 7 is a conceptual diagram of an electromagnet having a six-core structure according to another embodiment of the present invention, Figure 8 is Conceptual diagram of an electromagnet having a structure of an eight core form according to an embodiment of the invention, Figure 9 is a conceptual diagram of an electromagnet having a structure of a sixteen core form according to an embodiment of the present invention.

Referring to FIG. 4, three winding cores 12 are shown in which coils are wound around a core, and magnetic fields generated from three winding cores 12 arranged side by side at regular intervals of 120 degrees are shown as magnetic flux hubs (not shown). Focused on). Here, the winding core 12 refers to a coil wound around a high permeability core. The three winding cores 12 are configured to generate mutual repulsion. In addition, the three winding cores 12 are arranged so as to surround the magnetic pole cores 14 and 15 that face each other, and the axes of the magnetic flux directions are arranged at equal intervals of 120 degrees in parallel to each other so that the interval between the magnetic pole cores 14 and 15 is minimal. The magnetic flux density between the magnetic pole cores 14 and 15 is improved by minimizing leakage magnetic flux that is about to escape. The axis of the magnetic flux direction generated in the winding core 12 is connected to be parallel to the axis of each of the magnetic pole cores (14, 15). A magnetic flux hub is formed to focus one side of the three winding cores 12 to form an N pole. The other side of the three winding cores 12 are concentrated to form a magnetic flux hub for forming the S pole. Thus, the electromagnets are configured to have two corresponding polarities facing each other. In this case, the magnetic flux hub may be composed of a magnetic flux hub for fixing one side of the three winding cores 12 and a magnetic flux hub for fixing the other side of the winding cores 12. Each magnetic field focused by a pair of magnetic flux hubs is focused on each magnetic pole core 14 and 15 to form an N pole and an S pole, respectively. Each coil wound on the three winding cores 12 may be connected in series or in parallel to constitute two types of resistors (3R _coil or 1 / 3R _coil ). In the electromagnet shown in FIG. 4, the magnetic flux hub has a T or Y shape, and thus, the magnetic flux hub will be referred to as a 'T' shape or a 'Y' shape magnetic flux hub.

In FIG. 5, four winding cores 16 are shown in which coils are wound around the core, and magnetic fields generated from four winding cores 16 arranged side by side at regular intervals of 90 degrees are shown in the magnetic flux hub (not shown). Focused Here, the winding core 16 refers to a coil wound around a high permeability core. The four winding cores 16 are configured to generate mutual repulsion. Also, the four winding cores 16 surround the magnetic pole cores 18 and 19 and are arranged such that the axes of the magnetic flux directions are arranged at equal intervals of 90 degrees in parallel to each other so that the space between the magnetic pole cores 18 and 19 is minimum. By minimizing leakage flux to escape, the magnetic flux density between the magnetic pole cores 18 and 19 is improved. The axis of the magnetic flux direction generated in the winding core 16 is arranged to be parallel to the axis of the magnetic pole core. In addition, a magnetic flux hub is formed to focus one side of the four winding cores 16 to form an N pole. In addition, by converging the other side of the winding core 16 to form a magnetic flux hub for forming the S pole. In this way, it has bipolarity of N pole and S pole, respectively. Each magnetic field focused by a pair of magnetic flux hubs is focused on respective magnetic pole cores 18 and 19 to form an N pole and an S pole, respectively. Each coil wound on the four winding cores 16 may be connected in series or in parallel to each other, and thus may be configured as three types of resistors (4R _coils, 1 / 2R _coils, or 1 / 4R _coils ). Various output specifications are available.

In FIG. 6, six winding cores 20 are shown in which coils are wound around a core, and a magnetic field generated from six winding cores 20 arranged side by side at a constant interval of 60 degrees is shown as a pair of magnetic pole hubs (not shown). Focused). The six winding cores 20 are configured to generate mutual repulsion. In addition, the six winding cores 20 are arranged to surround the magnetic pole core 22 so that the axes of the magnetic flux directions are arranged at equal intervals of 60 degrees in parallel to each other so as to escape from the minimum spacing between the magnetic pole cores 22 and 23. The magnetic flux density between the magnetic pole cores 22 and 23 is improved by minimizing the leakage magnetic flux. The axis of the magnetic flux direction generated in the winding core 20 is connected to be arranged in parallel with the axis of the magnetic pole core (22, 23). In addition, by concentrating one side of the six winding cores 20 to form a magnetic flux hub for forming the N pole. Concentrating the other side of the winding core 20 to form a magnetic flux hub for forming the S pole. This configuration allows the electromagnet to have bipolarity. Each magnetic field focused by a pair of magnetic flux hubs is focused on respective magnetic pole cores 22 and 23 to form an N pole and an S pole, respectively. In the electromagnet shown in FIG. 6, the magnetic flux hub has a shape of *, so it will be referred to as a '*' shaped or star shaped magnetic flux hub.

In FIG. 7 three winding cores 24 are shown, with coils wound around the core, and three winding cores 25 arranged below. The magnetic field generated from the three winding cores 24 formed in the upper portion is focused on the magnetic flux hub in the upper portion, and the magnetic field generated in the three winding cores 25 formed in the lower portion is concentrated in the magnetic flux hub in the lower portion. The six winding cores 24 and 25 are configured to generate mutual repulsion in the magnetic flux core. In addition, the upper winding core 24 and the lower winding core 25 is configured to generate mutual attraction. In addition, the upper three winding cores 24 are formed to surround the magnetic pole core 26 of one side, the lower three winding cores 25 are formed to surround the magnetic pole core 27 of the other side and the axis of the magnetic flux direction The magnetic flux densities between the magnetic pole cores 26 and 27 are improved by being connected at equal intervals. The axis of the magnetic flux direction generated in the winding cores 24 and 25 is connected to be perpendicular to the axes of the magnetic pole cores 26 and 27. The three winding cores 24 formed on the upper side are focused by the magnetic flux hub on one side, and the lower three winding cores 25 are focused by the magnetic flux hub on the other side. Each magnetic field focused by a pair of magnetic flux hubs is focused on respective magnetic pole cores 26 and 27 to form an N pole and an S pole, respectively. In the electromagnet illustrated in FIG. 7, the magnetic flux hub has a T or Y shape, so it will be referred to as a 'T' shape or a 'Y' magnetic flux hub.

In FIG. 8, four winding cores 28 are shown disposed above and with coils wound around the core, and four winding cores 29 arranged below. The magnetic field generated from the four winding cores 28 formed on the upper side is focused on the upper magnetic flux hub, and the magnetic field generated from the four winding cores 29 formed on the lower side is focused on the lower magnetic flux hub. The eight winding cores 28 and 29 are configured to generate mutual repulsion. In addition, four winding cores 28 formed on the upper side are formed to surround the magnetic pole core 30 on one side, and four winding cores 29 formed on the lower side are formed to surround the magnetic pole core 31 on the other side, and the magnetic flux The axes in the direction are arranged to be arranged at equal intervals so that the magnetic flux density between the magnetic pole cores 30 and 31 is improved. The axis of the magnetic flux direction generated in the winding cores 28 and 29 is connected to be perpendicular to the axes of the magnetic pole cores 30 and 31. Four winding cores 28 formed on the upper side are focused by the magnetic flux hub on one side, and four winding cores 29 on the lower side are focused by the magnetic flux hub on the other side. Each magnetic field focused by a pair of magnetic flux hubs is focused on each magnetic pole core 30 and 31 to form an N pole and an S pole, respectively. In the electromagnet shown in FIG. 8, the magnetic flux hub has a + shape so that it may be referred to as a '+' shape or a cross type flux hub.

In FIG. 9, the four cores disposed at the top are formed in two stages, and the coil forms eight upper winding cores 32 wound around the core, and the four cores arranged at the bottom are eight in two stages. The lower winding core 33 is formed. The magnetic field generated from the eight winding cores 32 formed on the upper side is focused on the upper magnetic flux hub, and the magnetic field generated from the eight winding cores 33 formed on the lower side is focused on the lower magnetic flux hub. Each of the sixteen winding cores 32 and 33 is configured to generate mutual repulsion. In addition, the eight winding cores 32 formed on the upper side are formed to surround the magnetic pole core 34 on one side, and the eight winding cores 33 formed on the lower side are formed to surround the magnetic pole core 35 on the other side and the magnetic flux direction. The magnetic flux densities between the magnetic pole cores 34 and 35 are improved by connecting the axes of the axes so as to be arranged at equal intervals in parallel. The axis of the magnetic flux direction generated in the winding cores 33 and 34 is connected to be perpendicular to the axes of the magnetic pole cores 34 and 35. The eight winding cores 32 formed at the top are focused by the magnetic flux hub on one side and the four winding cores 33 on the bottom are focused by the magnetic flux hub on the other side. Each magnetic field focused by a pair of magnetic flux hubs is focused on respective magnetic pole cores 34 and 35 to form an N pole and an S pole, respectively. In the electromagnet shown in FIG. 9, the magnetic flux hub has a + shape, so it will be referred to as a '+' shape or a cross type flux hub.

The electromagnet described in FIG. 4 to FIG. 9 is further provided with a magnetic flux hub that does not exist in the conventional multipole electromagnet and used to convert to a two pole to differentiate the conventional multipole electromagnet. In addition, the shape of the magnetic flux hub formed in the above-described electromagnets may be any one of H, K, O, T, V, X, Y, +, * shape.

In the magnetic flux hubs described in FIGS. 4 to 9, the area C of the magnetic pole cores 14, 15, 18, 19, 22, 23, 26, 27, 30, 31, 34, 35 is preferably a winding. In the cores 12, 16, 20, 24, 25, 28, 29, 32, 33, the cross-sectional area (S _c ) of the winding cores is configured to be larger than 1/2 of the area (S _c × m). This may be expressed as Equation 2 below.

Conversely, the area C of the magnetic pole cores 14, 15, 18, 19, 22, 23, 26, 27, 30, 31, 34, 35 is the winding cores 12, 16, 20, 24, 25, 28, 29, 32, 33) may be configured to be smaller than the area (S _c × m) of the cross-sectional area (Sc) of the winding core, it can be represented by the formula (S _c × m)> C.

On the other hand, with reference to Figures 4 to 9 for the electromagnet in the form of a triple core to 16 core core, it is also possible to have a five-core, seven-core core with the winding cores arranged at equal intervals, electromagnets more than 16 cores It will be readily understood by those skilled in the art by the foregoing description that it is possible. That is, by increasing the number of branches relative to the flux node (electrox node) it is possible to implement an electromagnet having a larger number of cores connected.

10 is a cross-sectional view showing a cross section of a winding core wound on a core according to the exemplary embodiment of FIG. 5 of the present invention. The limits of electromagnets begin to occur when certain parts of the magnetic closure circuit self saturate. As described above, in the case of conventional electromagnets, the magnetic poles are wound on the magnetic pole core, but the magnetic poles are saturated first. However, in the electromagnet according to the present invention, the coils 164 are wound on the cores 160 and 162 to the cores 160 and 162. It is necessary to prepare for the case of self saturation.

In the cores 160 and 162, the first magnetic saturation may come from the core 160 of the core, and the core end 162 and the core center of the cores 160 and 162 to which the coil is wound. A method of varying the outer diameter of the 160 may be applied. At this time, the diameter D _cc of the central portion 160 of the cores 160 and 162 is larger than the diameter D _ce of the end portion 162 of the core to increase the amount of magnetic flux that passes through the winding cores 12, 16, and 20. , 24, 25, 28, 29, 32, 33) The magnetic flux density can be increased at the end.

In particular, in the case of the high magnetic flux core to which the present method is applied, the magnetic flux density of the end 162 of the winding core 16 is increased while the number of windings of the center core 160 decreases, so that the ratio of the output magnetic field (H) to the applied power (P) ( H / P efficiency) is increased. Therefore, preferably, the diameter Dcc of the core central portion 160 and the diameter Dce of the end portion 162 are set so that the diameter is within the range of the following equation (3).

On the other hand, if the winding per coil layer is more than 30 turns, the ratio of the diameter (D _core ) of the _core (T _core ) to the thickness (T _CL ) of the coil layer (T _CL /) D _core ) When the value is between 0.1 and 0.5, the efficiency (H / P) is maximized. Even considering various design variables, the thickness T _CL of the coil layer is preferably contained within 0.1 to 1 times the diameter D _core of the _core . If (T _CL / D _core ) is 2 or more, the circumference of the outermost coil layer becomes large, so that the electrical resistance of the coil becomes too large, which seriously reduces the efficiency (H / P). Therefore, the ratio T _CL / D _core between the thickness T _CL of the coil layer and the diameter D _{core of the core} is set to be within the range of the following equation (4).

Further, the length of the central portion 160 with respect to the length L _e of the end 162 at the winding core 16 with respect to the length L _e of the end 162 having a diameter smaller than the central portion 160 of the core ( L _c) ratio (L _c / L _e a) preferably it is configured to be within the range of equation (5) in the following.

11 is a perspective view and a partially exploded perspective view showing a quad core electromagnet according to an embodiment of the present invention, Figure 12 is a view showing a magnetic flux hub according to an embodiment of the present invention. 11 and 12, the present invention in Figure 11 (a) and (b) of the present invention the winding core 16, the magnetic pole core (18, 19), the magnetic pole handle 140, the magnet carrying roller 143, It is composed of an electrode terminal 120, the magnetic flux hub 130 and the pedestal (110).

The magnetic flux hub 130 should be designed to an appropriate thickness in order to reduce the magnetic resistance. The criterion for determining the thickness T _FH of the magnetic flux hub 130 is the distal radius r _c of the magnetic core 162 at the center of the winding core 16. If the thickness of the magnetic flux hub is thinner than the radius 162 of the magnetic core, the magnetoresistance is large and the magnetic field is easily saturated, and thus the performance of the electromagnet is not maximized. On the other hand, even if the thickness of the magnetic flux 130 is too thick than the radius 162 of the magnetic core may be a disadvantage in terms of the magnetoresistance by increasing the path of the arrival of some magnetic flux and the manufacturing cost is also high. The optimum thickness of the magnetic flux hub 130 is around 2 r _c , and the thickness T _FH of the magnetic flux hub 130 is configured to be within the range of the following Equation 6 in consideration of various variables in the design.

Since the radius of the cores 160 and 162 and the coil 164 wound on the core is large, the winding cores 12, 16, 20, 24, 25, 28, 29, 32, and 33 are generated in the nodes having a relatively small area. It is difficult to collect magnetic fields. Therefore, the magnetic flux hub 130 to serve as a node for focusing the generated magnetic field is required. The magnetic flux hub 130 mechanically connects the winding core 16 and the magnetic pole cores 18 and 19. The magnetic flux hub 130 serves as a passage for collecting magnetic flux and supplying the magnetic flux to the magnetic pole cores 18 and 19, and includes a cooling unit 142 cooling the cores 160 and 162 heated by the coil 164. do. The cooling unit 142 may include a cooling water passage 136 that operates in a water-cooled manner, and a heat sink 138 that operates in an air-cooled manner.

As described above, since the resistance of the coil 164 wound around each of the cores 160 and 162 is small, the burden of cooling the coil 164 is reduced. However, the area in which the coils 164 and the cores 160 and 162 contact each other is widened so that all components such as the cores 160 and 162 including the coils 164 and the magnetic pole cores 18 and 19 are heated in their entirety. Therefore, in order to drive the electromagnet stably under the condition of applying a large current, an appropriate cooling method should be applied.

Heat is generated by the resistance of the coil, which must be cooled by air or water cooling. In the case of the water-cooled type, the refrigerant may be circulated through the cooling water passage 136 configured in the cores 160 and 162 and the magnetic flux hub 130. In the case of the water-cooled type, fluid such as a refrigerant or cooling water may be cooled while rotating inside the magnetic flux hub 130 and the cores 160 and 162. In the case of air cooling, a heat exchange mechanism such as a heat sink 138 or a heat sink fin may be provided on the surface of the magnetic flux hub 130 to perform cooling. The cooling method may cool the heat generated in the coil 164 using at least one of water-cooling and air-cooling. That is, the flux hub 130 may include a water cooling or air-cooling cooling unit 142 to cool not only the winding core 16 attached to the flux hub 130 but also the coil 164. It is also possible to apply a method of winding a layer of water-cooled hollow core wire around the winding core 16.

Pedestal 110 serves to support the electromagnet, it is composed of a non-metal or metal. When the material of the pedestal 110 is made of metal, a cooling effect of cooling the magnetic flux hub 130 may be expected. In addition, it is possible to implement a water-cooled cooling method for forming a circulation channel in the pedestal 110 and circulating the refrigerant.

The winding core 16 has a magnetic field formed when a current is applied through the electrode terminal 120. At this time, the magnetic field of the N polarity is formed on one side of the winding core 16 described above, and the magnetic field of the S polarity is formed on the other side. The electrode terminal 120 is a port for connecting a power source to the winding core 16 and the repulsive force is generated between the four winding cores 16 by the connected power source. In the above-described embodiment, an example in which four winding cores 16 are configured has been described, but as described in FIGS. 4 to 9, the number of winding cores may be increased to three or the number of winding cores may be used to implement an electromagnet.

Meanwhile, in the conventional electromagnet, coils are wound around cylindrical bobbins and cores are inserted between bobbins. However, in multicore electromagnets, the efficiency (H / P) is improved only when the spacing between the multicores is minimized, so that coils including bobbins are possible. The thickness of the layer should be thin. In this way, the space corresponding to the thickness of the bobbin can also be devoted to the coil layer to maximize the efficiency (H / P). Accordingly, the winding core 16 includes a coil 164 wound around the cores 160 and 162, and a thin insulating layer 166 is formed between the wound coil 164 and the cores 160 and 162. The insulating film 166 is made of an insulating material having excellent insulation resistance and heat resistance. The insulating film 166 is configured to be as thin as possible because it conducts the coil heat generated by the resistance of the coil 164 through the core during high current driving.

Magnetic fields of the N pole and the S pole formed by the winding core 16 are focused by a pair of magnetic flux hubs 130 facing each other. A pair of magnetic flux hub 130 is configured on the pedestal 110 in the form facing each other. One of the pair of magnetic flux hubs 130 supports one side of each of the four winding cores 16 arranged side by side, and the other supports the other side of the four winding cores 16 described above. The magnetic flux hub 130 serves as a node for concentrating a magnetic field, and one of the pair of magnetic flux hubs focuses the N-polar magnetic field from the winding core 16 and the other of the magnetic flux hubs 130. One focuses a magnetic field of S polarity from the winding core 16. That is, the pair of magnetic flux hubs 130 concentrate the N pole and the S pole, respectively. The magnetic flux hub 130 includes a plurality of core accommodation parts 132 for connecting and accommodating a plurality of winding cores 16 and a plurality of core accommodation parts 132 to accommodate the magnetic pole cores 18 and 19. Cooling unit 142 for cooling the heat generated by the electromagnet in at least one of a water-cooled or air-cooled manner to cool the heat generated by the mounting adapter 134 and the coil 164 wound on the winding core 16 It includes.

The magnetic pole cores 18 and 19 are constituted by a pair of cylindrical ferromagnetic bodies which are spaced apart from each other in a state facing the inside of the winding core 16 described above. The pair of magnetic pole cores 18 and 19 are fixed to and detachable from the mounting adapter 134 configured at the center of each magnetic flux hub 130. A magnetic pole fixed to the magnetic flux hub 130 focusing the N polarity magnetic field among the pair of magnetic pole cores 18 and 19 exhibits the N polarity and collects the magnetic field of the S polarity among the pair of magnetic pole cores 18 and 19. The magnetic poles fixed to the magnetic flux hub 130 belonging to the S polarity. On the other hand, the coupling of the magnetic flux hub 130 and the magnetic pole will be described in more detail with reference to the drawings to be described later.

The magnetic pole handle 140 is configured to adjust the clearance gap of the magnetic pole face which is the end of the pair of magnetic pole cores 18 and 19 facing each other will be described in detail with reference to the drawings to be described later.

The cooling unit 142 configured in the magnetic flux hub 130 may be configured by air cooling and / or water cooling. When the cooling unit 142 is configured to be air-cooled, the heat sink 138 is formed to extend outside the magnetic flux hub 130, and is configured to be cooled by air by increasing a contact surface with air.

When the cooling unit 142 is configured to be water-cooled, the cooling unit 142 is configured to be formed in the form of a cooling water path 136 that circulates through the inside of the magnetic flux hub 130. The coolant circulating in the cooling water passage 136 may be water cooled by heat exchange, or heat exchanged refrigerant or coolant fluid.

Figure 13 is a cross-sectional view showing a connection state of the core accommodating portion and the winding core according to an embodiment of the present invention.

Referring to FIG. 13, if a gap occurs in the contact surface between the core accommodating part 132 of the magnetic flux hub 130 and the winding core 16 wound around the coil, a loss that lowers the magnetic field efficiency occurs. Therefore, in order to minimize the loss, the contact surface is made smoothly so that the magnetic flux hub 130 and the winding core 16 are in close contact. On the other hand, the magnetic flux hub 130 is composed of a magnetic material to focus the magnetic field generated in the winding core (16).

As shown in (a) of FIG. 13, when the protrusion 133 is formed at the end of the winding core 16 and the groove 135 into which the protrusion 133 can be inserted is formed in the core accommodating part 132, For close contact, the length L _{in of the} core accommodating part 132 and the length L _out of the protrusion must coincide with each other, but certain tolerances generated by mechanical coupling must be considered.

In (a) of FIG. 13, when D _core > 2D _f , the length L _{out of the} protrusion should be manufactured with a fine tolerance. On the other hand, when D _core <2D _f , the contact area is maximized only when the length L _out of the protrusion is made with a minute positive tolerance. In order to maximize the contact surface between the core accommodating part 132 and the winding core 16, the core accommodating part 141 may accommodate as much as the outer diameter D _core of the winding core 16 in the core accommodating part 141 as shown in FIG. 13B. It is possible to make a groove 145 of the engraved shape.

Meanwhile, as shown in FIG. 13A, the grooves 135 and 145 and the protrusion 133 are coupled and fixed by the screws 137. Alternatively, as shown in (b) of FIG. 13, the groove 145 and one side of the winding core 16 may be coupled and fixed by the screw 137.

14 is an assembled perspective view showing the assembled state of the magnetic flux hub and the magnetic pole core according to an embodiment of the present invention.

Referring to FIG. 14, there is shown a magnetic flux hub 130 for receiving magnetic pole cores 18, 19. The magnetic flux hub 130 includes a mounting adapter 134, a magnetic pole barrel 131, a magnetic pole cover 139, and a magnetic pole handle 140.

The mounting adapter 134 is configured to be coupled to the magnetic pole tube 131 on the front of the body portion of the magnetic flux hub 130 for receiving the magnetic pole cores 18 and 19. In addition, the magnetic flux hub 130 receiving the mounting adapter 134 has a substantially rhombus or T-shape or K-shape, the edge portion of the magnetic flux hub 130 is chamfered (Edge Cutting, chamfering) (134-1) To minimize the sharp or sharp parts to minimize leakage flux. In addition, the upper portion of the flux hub 130 constitutes a plurality of bolt holes (134-2) for mounting accessories or brackets.

The magnetic pole barrel 131 is coupled to the mounting adapter 134, and the front surface of the magnetic pole cover 139 is fixed to the magnetic flux hub 130 with a screw or the like. The magnetic pole barrel 131 is configured in the shape of a barrel housing the magnetic pole core 18.

The magnetic pole cover 139 covers the magnetic pole barrel 131 and the magnetic pole core 18, and combines the mounting adapter 134 and the magnetic pole barrel 131 to prevent the magnetic pole core 18 from escaping to one side.

One side of the magnetic pole handle 140 may be screwed into a hole formed in the center of the magnetic pole cover 139 in a state fixed to one side of the magnetic pole core 18 to advance and reverse the magnetic pole core 16. By advancing and retracting the magnetic pole core 18, the gap between the magnetic pole cores 18 and 19 is adjusted.

15 is a cross-sectional view illustrating a magnetic pole handle according to an embodiment of the present invention.

FIG. 15A illustrates that the magnetic pole core 18 is divided into an inner core stimulus 181 and an outer core stimulus 183, and the inner pole 181 is adjusted by adjusting the magnetic pole handle 140 fixed to the inner core stimulus 181. ) May be deformed while reciprocating between the mounting adapter 134 and the pole barrel 131. In addition, the outer core stimulation handle 185 for adjusting the outer core stimulus 183 is integrally connected to the outer circumferential surface of the outer core stimulus 183 in a screw-coupled state with the stimulation barrel 131. When the outer core stimulation handle 185 is rotated, the outer core stimulus 183 reciprocates back and forth in preparation for the fixed pole barrel 131 according to the rotation direction. For example, the magnetic pole handle 140 and the external core stimulation handle 185 are rotated to configure the internal core 181 to protrude relative to the external core stimulus 183. When the inner magnetic pole 181 protrudes, the density is focused on the magnetic pole core 18 to obtain a high density magnetic flux. That is, the magnetic pole handle 140 may be adjusted to adjust the inner core stimulus 181 to implement high density magnetic poles.

15 (b) is configured to adjust the stimulation handle 140 and the outer core stimulation handle 185 in a form in which the inner core stimulus 181 is indented in preparation for the outer core stimulus (183). In this case, when the outer core magnetic pole 183 protrudes in preparation for the inner core magnetic pole 181, the magnetic flux is dispersed in the magnetic pole core 18 to obtain a uniform magnetic flux. That is, by adjusting the stimulation handle 140 so that the outer core stimulation core 183 protrudes, it is possible to obtain a uniform stimulation.

In addition, by removing and configuring either the inner core stimulus 181 or the outer core stimulus core 183, it is possible to form a magnetic pole having an empty space. For example, when the inward stimulus 181 is removed, as much hollow as the inward stimulus 181 may be formed, and the outward stimulus 183 may be used as a stimulus.

16 is a cross-sectional view showing a cooling apparatus of an electromagnet according to another embodiment of the present invention.

Referring to Figure 16, it can be configured by winding a coil with a hollow on the outside after winding the electric coil. As such, the hollow coil in which the hollow is formed to flow the cooling fluid (cooling water) is referred to as the cooling coil 168. The cooling fluid flows into the hollow. In this way, when a current flows through the cooling coil, a magnetic field is generated and cooling is performed simultaneously with the generation of the magnetic field.

Coil 164 is used because there is no hollow, unlike the conventional electromagnet, the total thickness becomes that thin. When introduced into the structure of the multi-core electromagnet total number of turns (T _total) is divided by the number (m) of the core (T _total / m), the thickness of the coil layer can be configured even thinner. Therefore, even when only one layer of the cooling coil 168 is laminated to form the core 162, a sufficient cooling effect can be obtained by the cooling coil 168. When the cooling coil 168 is used, one of two electrodes provided in the coil 164 may be electrically connected to the cooling coil 168 to allow current to flow in the cooling coil 168. At this time, since the cooling coil 168 has a small number of windings and a short length, the electric resistance that is increased by the cooling coil 168 may be negligible because the electric resistance is very small. Therefore, an increase in electrical resistance can be neglected while generating a slightly higher magnetic flux than when using only the coil 164.

17 is a cross-sectional view showing a cooling jacket and a winding core according to an embodiment of the present invention, Figure 18 is a perspective view showing an electromagnet constituted by Figure 17 according to an embodiment of the present invention.

17 and 18, the side cooling jacket 190 is provided outside the winding core 16 in which the coil 164 is wound. The side cooling jacket 190 is configured as a pair to surround the winding core 16 in a state where one side is supported by the pedestal cooling jacket 110-1. That is, the pair of side cooling jackets 190 are fixed to each side of the pedestal cooling jacket 110-1 or one side of the flux hub 130, and the extended portions are configured to surround the winding core 16. . The side cooling jacket 190 has a cooling layer 169 implemented by air cooling or water cooling. Alternatively, the cooling fin 191 may be provided for the purpose of maximizing the surface area of the cooling layer 169 in order to implement air cooling. In order to implement a water-cooling type, a cooling water passage 173 is provided in the cooling layer 169 to circulate the cooling fluid or the cooling water.

A cooling layer may also be provided between the coil 164 and the core 162 constituting the winding core 16. However, in this case, it is necessary to pay attention because the magnetic field efficiency compared to the current is inversely proportional to the thickness of the cooling layer. That is, when the thickness of the cooling layer is thickened and the distance between the electric coil layer and the magnetic core layer increases, the magnetic field efficiency relative to the current may be reduced.

In addition, both the outside and the inside of the coil 164 may include a cooling layer. In this case, the best cooling performance can be secured. In this case, however, it is necessary to pay attention to the increase in production cost as the structural complexity increases.

As shown in FIG. 18A, a multi-core electromagnet having a H-shaped or X-shaped magnetic flux hub structure having a cooling jacket is illustrated. The configuration of the magnetic flux hub 130, the winding core 16, and the magnetic pole cores 18 and 19 is similar to the above-described embodiment, and thus description thereof will be omitted.

18 (b) shows a side cooling jacket 190 surrounding the winding core 16 on the side. The side cooling jacket 190 is configured by being supported on both sides of the pedestal cooling jacket 110-1 so that the cooling fins 191 are inserted into the outer side of the winding core 16. Cooling fins 191 is configured to be air-cooled or water-cooled to maximize the contact area with air or cooling water to efficiently discharge heat. The cooling fins 191 are not different from those consisting of cooling water passages 173 through which cooling water can instead circulate. That is, the cooling core 173 may be provided in the side cooling jacket 190 surrounding the winding core 16 to cool the winding core in a water-cooled manner. Alternatively, the air-cooled type and the water-cooled type can be mixed to be configured. In the space outside the cooling water passage 173 through which the cooling water flows, the cooling fin 191 may be configured to increase the heat exchange efficiency by maximizing a contact area of the cooling water.

In FIG. 18C, the pedestal cooling jacket 110-1 supporting the winding core 16 on the lower surface is shown. Pedestal cooling jacket (110-1) is composed of a cooling fin 111 is inserted into the inner side in contact with the winding core (16). The cooling fins 111 are configured to efficiently discharge heat generated from the winding core 16 by maximizing a contact area with air or cooling water. Although only the air cooling cooling fin 111 is shown in FIG. 18C, a cooling water passage circulating inside the pedestal cooling jacket 110-1 may be installed to form a water cooling system.

Alternatively, the pedestal cooling jacket 110-1 and the side cooling jacket 190 may include both air cooling and water cooling. That is, in the space where the coolant flows inside the side cooling jacket 190 and the pedestal cooling jacket 110-1, a cooling water duct for circulating the cooling water is installed and cooling fins 111 and 191 for maximizing the contact area of the cooling water. It can be configured to increase the heat exchange efficiency.

The side cooling jacket 190 and the pedestal cooling jacket (110-1) and the winding core 16 is easy to lift. Therefore, it is necessary to fill a material between the side cooling jacket 190 and the pedestal cooling jacket 110 and the winding core 16 to facilitate heat exchange. Cooling the side cooling jacket 190 and the pedestal using heat transfer materials such as grease, copper plate and indium foil (foil) to increase the thermal conductivity between the side cooling jacket 190 and the pedestal cooling jacket 110 and the winding core 16. The cooling efficiency may be improved by configuring the gap between the jacket 110 and the winding core 16. In addition, the side cooling jacket 190 and the pedestal cooling jacket 110 may be in contact with the magnetic flux hub 130 to cool the magnetic flux hub 130.

19 is a perspective view showing an electromagnet according to another embodiment of the present invention. 19 is similar in configuration to the magnetic flux hub 130, the magnetic pole cores 18 and 19, and the winding core 16 of the above-described embodiment, and thus description thereof will be omitted. However, in order to reduce heat generated in the plurality of winding cores 16 by using a water cooling method, a cooling water hub 210 is configured in the pedestal. The cooling water hub 210 configures a plurality of inlets and outlets by forming a cooling water inlet and an outlet for each of the winding cores 16. That is, the inlet and outlet of the coolant hub 210 should be distinguished from the inlet and the outlet of the coolant, and may be configured by dividing it into one pair so as to circulate one winding core 16.

By configuring the cooling water hub 210, it is possible to arrange the connecting pipes connecting the plurality of cooling water passages when each of the winding cores 16 has respective cooling water passages. That is, when the cooling water hub 210 is not present, the number of connecting pipes connecting the cooling water paths becomes very large, and the cooling water pipes may be bundled to increase complexity and difficult to clean up.

Cooling water hub 210 is configured by condensing the connection and the bundle of the cooling water to cool the respective winding cores 16 to the cooling water inlet and outlet to gather in one place, integrally with the pedestal 110 is configured for convenient control . Although the cooling water hub 210 protrudes to the outside in the above-described drawings, it may be configured to be built in the pedestal 110. In this case, the effect of cooling the pedestal can also be expected.

20 is a graph showing the indicators represented by the multi-core electromagnet according to an embodiment of the present invention. 20 (a) is a graph showing the amount of change in coil resistance according to the increase in the number of winding cores. Coil resistance can be calculated as the number of cores decreases. That is, when the number of cores is increased, the increase in the outer diameter is smaller than that of concentrating all the coils on one core, thereby reducing the electrical resistance.

In (b) of FIG. 20, the coil 164 wound in FIG. 20 is a graph showing an amount of change in coil resistance according to an increase in layers. In general, as the winding amount of the coil increases as shown by the dotted line, the resistance generated in the coil increases in series. However, when the number of the winding cores 16 increases, the increase in the outer diameter of the coil is small, so that the amount of increase in resistance decreases or increases close to linear. The linear increase in resistance that occurs at coil 164 is indicated by a solid line. In addition, looking at the solid line, it is possible to obtain a calculation result in which the increase in the resistance generated in the coil 164 is relaxed as the number of cores increases. The resistance generated in the coil 164 may be expressed by Equation 7 below.

Where R _coil represents the electrical resistance of the magnetic coil, R _w / L represents the electrical resistance per length of the magnetic coil, m represents the number of cores, and r _{CL (i)} represents the i-th coil layer 2 Represents the radius. k represents the number of turns per layer of coil.

20C is a graph showing a change in magnetoresistance according to the increase in the number of winding cores. As the number of winding cores increases, the effective area of the magnetic flux path increases so that the magnetic resistance decreases (R _m). = l / mS), and finally, the output magnetic field can be improved for the same power due to the decrease in the magnetoresistance.

21 is a graph showing a change in the magnetic field of the multi-core electromagnet with the increase of the current applied to the magnetic coil according to an embodiment of the present invention.

21 (a) is a graph showing the magnitude of the magnetic field generated by each winding core per winding core. The magnetic field generated in one of the winding cores 32 and 33 of the electromagnet composed of 10 or more cores is shown to be the smallest. However, it can be seen that the difference decreases as the current increases. However, referring to a graph showing the result of summing the magnetic fields generated by the individual winding cores 32 and 33 according to the number of the winding cores 32 and 33 as shown in FIG. Although it generates a magnetic field that is not significantly affected by the number of (32, 33), it can be seen that the magnitude of the magnetic field also increases in proportion to the number of the winding cores (32, 33) as the current increases.

On the other hand, the number of turns t _bobbin per winding core 32, 33 is the total number of turns (T _total ) divided by the number of cores (m) (T _total / m). If the number of winding cores 32 and 33 is different, assuming that the total number of coil turns N is the same and the sum of the coil areas of the winding cores 32 and 33 is the same, one winding core 32 When the _{total number} of windings (T _total ) is wound at 33, it can be seen that the magnetic saturation is easy even with a small current. That is, when the total number of windings (T _total ) is distributed and wound on the plurality of winding cores 32 and 33, the magnetic flux is dispersed and is not easily saturated.

As the number of winding cores 32 and 33 increases, the number of coil turns N per winding core is reduced, so that the self saturation current per winding core increases by the number of winding cores ( m ) times. The magnetic field per magnetic core before magnetic saturation, i.e. at low power, decreases at a rate of B _1core / m compared to one winding core (B _1core ), but at the magnetic pole-focused pole The magnetic field of is multiplied by the number of winding cores (m), which is similar to that of one winding core 32 and 33.

As a result, the area of the magnetic pole cores 34 and 35 is sufficiently large to receive all of the magnetic force generated in the winding cores 12, 16, 20, 24, 25, 28, 29, 32, 33 in the magnetic pole cores 34 and 35. Rather, the magnetic field in the magnetic pole cores 34 and 35 increases in proportion to the number of cores (m) at the maximum current because the magnetic field in the magnetic pole cores 34 and 35 increases with a high slope with respect to the current during the current period, in which the number of cores (m) times is larger. A calculation result can be obtained in which the magnetic field increases. That is, the low current generates a magnetic field that is not significantly affected by the number of cores m, but as the current increases, the magnitude of the magnetic field increases in proportion to the number of the winding cores 33 and 34.

22 is also a perspective view showing a mounting adapter capable of mechanically receiving a magnetic pole core in the magnetic flux hub. Unlike the existing electromagnet, the mounting adapter 134 may be used as a magnetic pole core interchangeable electromagnet that can be interchangeably mounted with a magnetic pole core 18 having a shape suitable for various applications. For example, a general pole type magnetic pole core 18 or an optical through pole type magnetic pole core 18-1 may be detachably attached to the housing of the magnetic pole core as necessary. Such magnetic pole core interchangeable electromagnets are advantageous for improving productivity. Conventional electromagnets could simply replace winding cores with different pole face shapes. However, in the present invention, the mounting adapter 134 may be provided to replace the magnetic pole cores 18 and 18-1 having various shapes ordered by the user, which is advantageous for profit generation. In addition, mass production of platform-type multicore electromagnets, excluding magnetic poles, is also advantageous to lower manufacturing costs.

For the convenience of the description in the embodiments described above for the convenience of description, the four-electrode electromagnet has been described mainly, it will be readily understood by those skilled in the art that the same technique can be applied to an electromagnet having a pole number of three to sixteen or more.

The drawings and the specification disclose the best embodiments, and specific terminology has been used, but it is used only for the purpose of describing embodiments of the invention and is intended to limit the meaning or limit the scope of the invention described in the claims. It is not. Therefore, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (29)

1. A plurality of winding cores configured by winding a coil around the core and generating at least three magnetic fields when a voltage is applied to the coil through an electrode terminal;

   A pair of magnetic flux hubs configured to be symmetrical to face each other and to combine the plurality of winding cores to focus a magnetic field generated in the plurality of winding cores; And

   And a pair of magnetic pole cores that are polarized by a magnetic field focused from the pair of magnetic flux hubs and are symmetrically opposed to each other in a coupled state to the magnetic flux hubs.

   The plurality of flux hubs,

   A plurality of core accommodating parts accommodating the plurality of winding cores;

   A magnetic pole accommodating part configured to be provided inside the plurality of core accommodating parts to accommodate the magnetic pole cores; And

   And a cooling unit configured outside or inside the magnetic flux hub to cool heat generated by a coil wound on the winding core.

   An edge of the magnetic flux hub is a high efficiency electromagnet having a multi-core structure is configured in the form of chamfering (Edge Cutting, chamfering).
2. The method of claim 1,

   The plurality of winding cores are configured to surround the magnetic pole core, and the high efficiency electromagnet having a multi-core structure is coupled to the magnetic flux hub so that the axis of the magnetic flux direction passing through the winding core is parallel to each other.
3. According to claim 1, The magnetic pole receiving unit,

   A stimulation barrel configured to receive the stimulation core and be configured in a barrel shape;

   A mounting adapter configured to receive the magnetic pole tube and couple the magnetic core to the magnetic flux hub; And

   A high efficiency electromagnet having a multi-core structure comprising; the magnetic pole cover and the magnetic pole core, the mounting adapter, the magnetic pole cover coupled to the magnetic pole.
4. The method of claim 1, wherein the magnetic pole core,

   A high efficiency electromagnet having a multi-core structure, wherein the cross-sectional area of the magnetic pole core is configured to satisfy the following equation.

   (S _c × m) / 2 <C

   Where S _c represents the cross-sectional area per core, m represents the number of cores, and C is the cross-sectional area of the magnetic pole core.
5. The method of claim 1, wherein the magnetic pole core,

   A high efficiency electromagnet having a multi-core structure, wherein the cross-sectional area of the magnetic pole core is configured to satisfy the following equation.

   (S _c × m)> C

   Where S _c represents the cross-sectional area per core, m represents the number of cores, and C is the cross-sectional area of the magnetic pole core.
6. The method of claim 1, wherein the magnetic flux hub,

   A high efficiency electromagnet having a multi-core structure, wherein the thickness of the magnetic flux hub is configured to satisfy the following equation.

   r _c <T _FH

   Where r _c is the radius of the magnetic core and T _FH is the thickness of the magnetic flux hub.
7. The method of claim 1, wherein the plurality of winding cores,

   A high efficiency electromagnet having a multi-core structure in which the diameter of the central portion and the diameters of both ends are differently configured, and the diameter of the central portion is larger than the diameter of the end portion.
8. The method of claim 7, wherein the diameter of the central portion and the diameter of the both ends,

   High efficiency electromagnet having a multi-core structure configured to be within the range of the following equation.

   1.1 <D _cc / D _ce <2

   (Wherein D _cc represents the diameter of the center of the core and D _ce represents the diameter of the end of the core)
9. The method of claim 7, wherein the plurality of winding cores,

   A high efficiency electromagnet having a multi-core structure configured such that the ratio of the length L _c of the center to the length Le of either of the two ends is within the range of the following equation.

   1 <L _c / L _e <3
10. The method of claim 1, wherein the plurality of winding cores,

    A high efficiency electromagnet having a multi-core structure configured such that a ratio between the thickness T _CL of the coil wound around the core and the diameter D _{core of the core} is within the range of the following equation.

    0.1 <(T _CL / D _core ) <1
11. The method of claim 1,

    A high efficiency electromagnet having a multi-core structure, which is wound around the winding coil and further comprises a cooling coil configured to form a hollow to flow a cooling fluid or cooling water.
12. The method of claim 11,

    The cooling coil is a high efficiency electromagnet having a multi-core structure that is disposed outside of the winding coil or between the coil and the core.
13. The method of claim 1,

    Further comprising a pedestal for supporting the pair of magnetic flux hub,

    The pedestal,

    Cooling fins configured on the inner side in contact with the winding coil; And

    A high-efficiency electromagnet having a multi-core structure comprising a; coolant or coolant passage through which the refrigerant circulates inside the pedestal.
14. The method of claim 13,

    The pedestal further comprises a pair of side cooling jackets for holding the winding core in a state in which each side is supported on both sides,

    The side cooling jacket,

    Cooling fins are inserted into the outside; And

    A high-efficiency electromagnet having a multi-core structure comprising a; coolant or a coolant passage through which the coolant or refrigerant circulates inside the side cooling jacket.
15. According to claim 1, The pedestal,

    A high-efficiency electromagnet having a multi-core structure further comprising a coolant hub configured by dividing each coolant inlet and outlet into a coolant circulating each winding core into a pair and collecting them together.
16. The method of claim 14, wherein the side cooling jacket and the pedestal,

    High efficiency electromagnet having a multi-core structure formed by filling any one of grease, copper plate and indium thin plate between the winding core.
17. The method of claim 1, wherein the stimulation core is

    A cylindrical inner core inwardly;

    An outer core core configured to be rotatable with the inner core core and surrounding the inner core core;

    A magnetic pole handle fixed to one side of the inner core core to reciprocally adjust the inner core core back and forth; And

    A high-efficiency electromagnet having a multi-core structure comprising; an outer core stimulation handle is fixed to the outer circumferential surface of the outer core core to reciprocally adjust the outer core core back and forth.
18. The method of claim 17, wherein the stimulation core,

    A high efficiency electromagnet having a multi-core structure to obtain a focused magnetic field by causing the inner core core to protrude more than the outer core.
19. The method of claim 17, wherein the stimulation core,

    A high efficiency electromagnet having a multi-core structure to obtain a uniform magnetic field by causing the outer core core to protrude more than the inner core core.
20. The method of claim 17, wherein the stimulation core,

    High efficiency electromagnet having a multi-core structure to remove the inner core core from the outer core core to form a magnetic pole formed hollow.
21. The method of claim 1, wherein the plurality of cores,

    An insulating film is formed between the coil wound on the core,

    The insulating film is an electromagnet having a multi-core structure composed of a material that is insulating and heat resistant.
22. The method of claim 3, wherein the core receiving portion,

    The magnetic pole tube, the mounting adapter and the magnetic pole cover coupled to the magnetic flux hub by fixing the screw, the high efficiency electromagnet having a multi-core structure configured to detach the magnetic pole tube, the mounting adapter, the magnetic pole cover and the magnetic pole core, respectively.
23. Pedestal for supporting the electromagnet;

    A coil wound around the core and configured to form a magnetic field when a voltage is applied to the coil through an electrode terminal for supplying power to the electromagnet;

    A pair of magnetic flux hubs supported by the pedestal and configured to face each other symmetrically and mechanically coupling the plurality of winding cores, and focusing a magnetic field generated in the winding cores; And

    And a pair of magnetic pole cores supported in a connected state by the magnetic flux hub and disposed to face each other so as to have a polarity by the magnetic field focused from the pair of magnetic flux hubs.
24. The method of claim 23, wherein the plurality of winding cores,

    A high efficiency electromagnet having a multi-core structure comprising at least three and supporting the three or more winding cores while being connected to the pair of magnetic flux hubs.
25. The method of claim 23, wherein the plurality of winding cores,

    A high efficiency electromagnet having a multi-core structure is connected so that the axis of the magnetic flux direction generated in the winding core is arranged in parallel with the axis of the magnetic pole core.
26. The method of claim 23, wherein the magnetic flux hub,

    A plurality of core accommodation parts for connecting and accommodating the plurality of winding cores;

    A magnetic pole accommodating part configured inside the plurality of winding core accommodating parts and accommodating magnetic poles;

    A high efficiency electromagnet having a multi-core structure comprising a; cooling unit for cooling the heat generated by the coil wound on the winding core.
27. The method of claim 26, wherein the cooling unit,

    High efficiency electromagnet having a multi-core structure having a plurality of heat sinks formed to extend to extend the contact surface with the air to the outside of the magnetic flux hub.
28. The method of claim 26, wherein the cooling unit,

    High efficiency electromagnet having a multi-core structure that is formed through the passage of the cooling water circulating through the magnetic flux hub.
29. The method of claim 23, wherein the pair of magnetic pole cores,

    A cylindrical housing coupled to the receiving portion formed inside the magnetic flux hub;

    A magnetic pole engaging with a screw thread formed inside the housing; And

    A high efficiency electromagnet having a multi-core structure that is formed at the end of the pole and comprises a pole handle for rotating the pole to adjust the distance between the poles.

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