Magnetic bearing with common position eddy current displacement sensor

Abstract

The present invention relates to a magnetic bearing having a common position eddy current displacement sensor, and more particularly, to a magnetic bearing having a common position eddy current displacement sensor for reducing a sensor installation space and manufacturing cost and reducing a sensor noise problem. A structure of the present invention for achieving the above object provides a magnetic bearing having a common position eddy current displacement sensor, comprising: an electromagnet portion having a circular housing formed with a hollow inside and a plurality of electromagnets arranged along the inside periphery of the housing; an amplifier unit coupled to one side of the electromagnet portion; a coil wiring portion coupled to the other side of the electromagnet portion; and a plurality of sensor portions arranged along the inside periphery of the electromagnet portion, both ends of each of the sensor portions being coupled to the coil wiring portion and the amplifier unit, respectively, and being arranged between the coil wiring portion and the amplifier unit, the sensor portions being arranged to measure displacement of a levitation body levitated inside the electromagnet portion at a common position with the levitation body.

Description

Technical Field

[0001] The present invention relates to a magnetic bearing with a co-located eddy current displacement sensor, and more particularly to a magnetic bearing with a co-located eddy current displacement sensor for reducing sensor installation space and manufacturing costs and reducing sensor noise problems. Background Art

[0002] Generally, a magnetic bearing is constructed by arranging strong magnetic magnets or electromagnets around a rotating shaft, and by magnetic levitation, a suspended body formed in a direction perpendicular to the rotating shaft is floated, thereby functioning as a bearing.

[0003] More specifically, unlike conventional ball bearings, magnetic bearings utilize a non-contact method that does not directly contact a rotating body, and can suspend a suspended body in mid-air by magnetic force, thereby achieving rotational or linear motion of the suspended body.

[0004] Conventional bearings often generate friction due to contact, so magnetic bearings, which are designed to minimize friction, are now being used in various fields.

[0005] Regarding magnetic bearings, in order to prevent contact between the suspended body and the magnets and to control the correct operation of the bearings, it is necessary to measure the axial displacement of the rotating body.

[0006] Figure 1 This diagram illustrates an example of a conventional magnetic bearing displacement control sensor.

[0007] like Figure 1 As shown, the conventional magnetic bearing 1 needs to install the sensor 3 next to the bearing 2 composed of an electromagnet, and therefore requires a separate installation space for the sensor 3 .

[0008] In addition, if Figure 1 As shown, when the sensor 3 is located beside the bearing 2 , the suspension and the sensor 3 are not aligned to be coaxial, resulting in reduced accuracy in displacement measurement and difficulty in design and control.

[0009] Therefore, there is a need for a magnetic bearing with a coaxial eddy current displacement sensor that reduces sensor installation space and manufacturing costs and reduces sensor noise problems.

[0010] Prior Art Document Korean Patent No. 10-1158812 Summary of the Invention

[0011] Problems to be solved by the invention

[0012] An object of the present invention to solve the above-mentioned problems is to provide a magnetic bearing having co-located eddy current displacement sensors for reducing sensor installation space and manufacturing costs and reducing sensor noise problems.

[0013] The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and those skilled in the art to which the present invention belongs can clearly understand other technical problems not mentioned from the following description.

[0014] Means used to solve problems

[0015] The structure of the present invention for achieving the above-mentioned purpose provides a magnetic bearing with a common position eddy current displacement sensor, which is characterized in that it includes: an electromagnet part, having a circular shell with a hollow inner side and a plurality of electromagnets arranged along the inner periphery of the above-mentioned shell; an amplifier unit, coupled to one side of the above-mentioned electromagnet part; a coil wiring part, coupled to the other side of the above-mentioned electromagnet part; and a plurality of sensor parts, arranged along the inner periphery of the above-mentioned electromagnet part, with the two ends respectively coupled to the above-mentioned coil wiring part and the above-mentioned amplifier unit and arranged between the above-mentioned coil wiring part and the above-mentioned amplifier unit, the above-mentioned sensor part being configured to measure the displacement of the above-mentioned suspension on the same axis as the suspension suspended inside the above-mentioned electromagnet part.

[0016] In an embodiment of the present invention, it may be characterized in that the above-mentioned electromagnet part includes: a vertical frame, arranged between the above-mentioned shell and the above-mentioned electromagnet, extending toward the above-mentioned coil wiring part and the above-mentioned amplifier unit; and a horizontal frame, formed at the end of the above-mentioned vertical frame, arranged to be combined with the above-mentioned coil wiring part and the above-mentioned amplifier unit.

[0017] In an embodiment of the present invention, it may be characterized in that the above-mentioned sensor part includes: a sensor substrate composed of a PCB; a sensor coil formed on the above-mentioned sensor substrate; and a protrusion formed from the four corners of the above-mentioned sensor substrate and protruding along the length direction of the above-mentioned sensor substrate, and the above-mentioned protrusion is configured to be clamped and combined with the hole formed in the above-mentioned coil wiring part and the above-mentioned amplifier unit.

[0018] In an embodiment of the present invention, it may be characterized in that it further includes a support portion, which is combined between the above-mentioned sensor portion and the above-mentioned shell, and is extended in a manner having a length corresponding to the above-mentioned sensor portion, and the above-mentioned support portion is configured in a direction perpendicular to the above-mentioned sensor portion.

[0019] In an embodiment of the present invention, it may be characterized in that the above-mentioned sensor part includes: a central hole formed in the center of a sensor substrate composed of a PCB; and edge holes formed at both end sides in the length direction of the above-mentioned sensor substrate, and the above-mentioned sensor part is configured so that the above-mentioned support part is clamped and combined with the above-mentioned central hole and the above-mentioned edge hole.

[0020] In an embodiment of the present invention, the invention may be characterized by further comprising a reinforcing portion configured so that both ends of the reinforcing portion are connected to the coil wiring portion and the amplifier unit.

[0021] In an embodiment of the present invention, it may be characterized in that the electromagnet portion further includes a column portion, the column portion being arranged between the housing and the coil wiring portion, and a plurality of the column portions being arranged around the other side surface of the housing.

[0022] In an embodiment of the present invention, it may be characterized in that it further includes a coupling portion configured to further couple and fix the sensor portion on the horizontal frame.

[0023] In an embodiment of the present invention, it may be characterized in that the sensor portion includes: a sensor substrate composed of a PCB; a sensor coil formed on the sensor substrate; and clamping holes formed at four corners of the sensor substrate.

[0024] In an embodiment of the present invention, its feature may be that the above-mentioned coupling portion includes: a coupling body, forming a body, extending in a direction parallel to the above-mentioned sensor substrate; a pair of clamping bodies, extending from both ends of the above-mentioned coupling body to the adjacent above-mentioned clamping holes, and clamped in the above-mentioned clamping holes; and a pair of fixing bodies, extending from both ends of the above-mentioned coupling body, respectively, to be coupled with the adjacent above-mentioned horizontal frame.

[0025] Effects of the Invention

[0026] The present invention, based on the above-described structure, has the following effects: it is possible to reduce the sensor installation space and manufacturing costs, and it is possible to reduce the sensor noise problem.

[0027] In addition, the present invention facilitates assembly and separation of the sensor portion by clamping.

[0028] Furthermore, in the present invention, even when the electromagnet portion rotates, the support portion is aligned in a direction perpendicular to the sensor portion to support the sensor portion, thereby preventing the sensor substrate from being bent or deformed.

[0029] The effects of the present invention are not limited to the above-described effects, and should be understood to include all effects that can be inferred from the inventive structure described in the specification or claims of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This diagram illustrates an example of a conventional magnetic bearing displacement control sensor.

[0031] Figure 2 This is a perspective view of the amplifier unit side of a magnetic bearing equipped with a common position eddy current displacement sensor according to the first embodiment of the present invention.

[0032] Figure 3 This is a perspective view of the coil wiring portion side of a magnetic bearing including a common position eddy current displacement sensor according to the first embodiment of the present invention.

[0033] Figure 4 This is a perspective view of a magnetic bearing equipped with a common position eddy current displacement sensor according to the first embodiment of the present invention, with the amplifier unit removed.

[0034] Figure 5 This is a perspective view of an enlarged sensor portion of a magnetic bearing equipped with a common position eddy current displacement sensor according to the first embodiment of the present invention.

[0035] Figure 6 This is a perspective view of a sensor unit according to the first embodiment of the present invention.

[0036] Figure 7 This is a perspective view of the amplifier unit side of a magnetic bearing equipped with a common position eddy current displacement sensor according to a second embodiment of the present invention.

[0037] Figure 8 This is a perspective view of the coil wiring portion side of a magnetic bearing including a common position eddy current displacement sensor according to a second embodiment of the present invention.

[0038] Figure 9 This is a perspective view of a magnetic bearing equipped with a common position eddy current displacement sensor according to a second embodiment of the present invention, with an amplifier unit removed.

[0039] Figure 10 This is a perspective view of an enlarged sensor portion of a magnetic bearing equipped with a common position eddy current displacement sensor according to a second embodiment of the present invention.

[0040] Figure 11 This is a perspective view of a sensor unit according to a second embodiment of the present invention.

[0041] Figure 12 This is a perspective view of a disassembled amplifier unit of a magnetic bearing equipped with a co-located eddy current displacement sensor according to a third embodiment of the present invention.

[0042] Figure 13 This is a perspective view of the coil wiring portion side of a magnetic bearing including a common position eddy current displacement sensor according to a third embodiment of the present invention.

[0043] Figure 14 This is a perspective view of an enlarged sensor portion of a magnetic bearing equipped with a common position eddy current displacement sensor according to a third embodiment of the present invention.

[0044] Figure 15 This is a perspective view of a sensor unit according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0045] The most preferred embodiment based on the present invention is characterized in that it includes: an electromagnet part, having a circular shell with a hollow inner side and a plurality of electromagnets arranged along the inner periphery of the above-mentioned shell; an amplifier unit, coupled to one side of the above-mentioned electromagnet part; a coil wiring part, coupled to the other side of the above-mentioned electromagnet part; and a plurality of sensor parts, arranged along the inner periphery of the above-mentioned electromagnet part, with both ends respectively coupled to the above-mentioned coil wiring part and the above-mentioned amplifier unit and arranged between the above-mentioned coil wiring part and the above-mentioned amplifier unit, the above-mentioned sensor part being configured to measure the displacement of the above-mentioned suspension on the same axis as the suspension suspended inside the above-mentioned electromagnet part.

[0046] The present invention is described below with reference to the accompanying drawings. However, the present invention can be implemented in various forms and is not limited to the embodiments described herein. Furthermore, to clarify the present invention, portions not relevant to the description are omitted from the drawings, and similar portions are denoted by similar reference numerals throughout the specification.

[0047] Throughout this specification, when a part is described as being "connected (connected, in contact with, or coupled) to another part, this includes not only "direct connection" but also "indirect connection" with other components interposed therebetween. Furthermore, when a part is described as "including" a certain component, unless otherwise specified, this implies that the part may also include the other component, and does not imply the exclusion of the other component.

[0048] The terms used in this specification are used only to illustrate specific embodiments and are not intended to limit the present invention. Unless the context clearly indicates a different meaning, a single statement includes a plurality of statements. In this specification, it should be understood that the terms "comprising" or "having" are intended to express the presence of the features, numbers, steps, actions, constituent elements, parts or combinations thereof recorded in the specification, without excluding in advance the presence or additional possibility of one or more other features or numbers, steps, actions, constituent elements, parts or combinations thereof.

[0049] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0050] Figure 2 This is a perspective view of the amplifier unit side of a magnetic bearing equipped with a common position eddy current displacement sensor according to the first embodiment of the present invention. Figure 3 This is a perspective view of the coil wiring portion side of a magnetic bearing including a common position eddy current displacement sensor according to the first embodiment of the present invention.

[0051] Figure 4 This is a perspective view of a magnetic bearing equipped with a common position eddy current displacement sensor according to the first embodiment of the present invention, with the amplifier unit removed.Figure 5 This is a perspective view of an enlarged sensor portion of a magnetic bearing equipped with a common position eddy current displacement sensor according to the first embodiment of the present invention. Figure 6 This is a perspective view of a sensor unit according to the first embodiment of the present invention.

[0052] Reference Figures 2 to 6 The magnetic bearing 100 with the common position eddy current displacement sensor according to the first embodiment includes an electromagnet portion 110 , an amplifier unit 120 , a coil wiring portion 130 , a sensor portion 140 , a support portion 150 , and a reinforcement portion 160 .

[0053] The electromagnet portion 110 includes a housing 111 , an electromagnet 112 , a vertical frame 113 , and a horizontal frame 114 .

[0054] The housing 111 may be formed of a circular frame having a hollow interior.

[0055] A plurality of the electromagnets 112 may be disposed along the inner periphery of the housing 111 , and may be configured to include an electromagnet and a permanent magnet so as to generate magnetic force as current flows.

[0056] The suspension may be configured to rotate while being suspended in the inner hollow portion of the housing 111 by the electromagnet 112 .

[0057] The vertical frame 113 is disposed between the housing 111 and the electromagnet 112 and may be extended toward the coil wiring portion 130 and the amplifier unit 120 .

[0058] Specifically, the vertical frame 113 may extend toward the housing 111 and the coil wiring portion 130 , and toward the housing 111 and the amplifier unit 120 .

[0059] Alternatively, one vertical frame 113 may be formed to extend toward the coil wiring portion 130 and the amplifier unit 120 .

[0060] The horizontal frame 114 is formed at an end portion of the vertical frame 113 and may be configured to be coupled to the coil wiring portion 130 and the amplifier unit 120 .

[0061] Specifically, the horizontal frame 114 may be formed to extend from the end of the vertical frame 113 in a direction parallel to the coil wiring portion 130 and the amplifier unit 120 to have a predetermined length.

[0062] The housing 111 and the amplifier unit 120 , as well as the housing 111 and the coil wiring portion 130 , can be fixedly coupled together by the vertical frame 113 and the horizontal frame 114 .

[0063] The amplifier unit 120 may be coupled to one side of the electromagnet portion 110 . The amplifier unit 120 may be made of a PCB and may be configured in a hollow circular disk shape corresponding to the shape of the housing 111 .

[0064] The coil wiring portion 130 may be coupled to the other side of the electromagnet portion 110 . The coil wiring portion 130 may be made of a PCB and may be configured in a hollow circular disk shape corresponding to the shape of the housing 111 .

[0065] The sensor unit 140 is disposed such that both ends thereof are coupled to the coil wiring unit 130 and the amplifier unit 120 so as to be located inside the electromagnet unit 110 , and a plurality of sensor units 140 may be disposed.

[0066] Specifically, each of the sensor units 140 is disposed so as to be located in front of a pair of electromagnets 112 and can be disposed at predetermined intervals.

[0067] The sensor unit 140 is disposed coaxially with the suspended body suspended inside the electromagnet unit 110 to measure the displacement of the suspended body, and an eddy current displacement sensor or the like may be used.

[0068] More specifically, the sensor portion 140 includes a sensor substrate 141 , a sensor coil 142 , a protrusion 143 , a central hole 144 , and edge holes 145 .

[0069] The sensor substrate 141 may be formed of a PCB and may be extended toward the amplifier unit 120 and the coil wiring portion 130 . In this case, the sensor substrate 141 may be extended to be longer than the electromagnet 112 .

[0070] Furthermore, the sensor substrate 141 can be positioned between adjacent electromagnets 112 in a manner parallel to a tangent line at any point on the outer circumference of the inner central axis of the electromagnet portion 110. The sensor substrate 141 thus configured can better measure the displacement of a suspended object suspended within the inner central axis of the electromagnet portion 110.

[0071] The sensor coil 142 is formed on the sensor substrate 141 and can be constituted by an eddy current sensor coil.

[0072] The protrusions 143 may be formed to protrude from four corners of the sensor substrate 141 along a longitudinal direction of the sensor substrate 141 .

[0073] The protrusion 143 provided as described above may be disposed so as to be clamped and coupled to holes formed in the coil wiring portion 130 and the amplifier unit 120 .

[0074] The central hole 144 may be formed in a hole shape at the center of the sensor substrate 141. Here, the central hole 144 may extend along the longitudinal direction of the sensor substrate 141 to have a predetermined length and may be located at the center of the sensor substrate 141 in the width direction.

[0075] The edge holes 145 may be formed at both ends of the sensor substrate 141 in the longitudinal direction. That is, the edge holes 145 may be located on the same line as the central hole 144 .

[0076] The support portion 150 is coupled between the sensor portion 140 and the housing 111 and may be extended to have a length corresponding to the sensor portion 140 . Furthermore, the support portion 150 may be disposed in a direction perpendicular to the sensor portion 140 .

[0077] More specifically, the support portion 150 includes a support body 151 , a support center protrusion 152 , a support edge protrusion 153 , and a support combination 154 .

[0078] The support body 151 constitutes a main body of the support portion 150 and may be formed to extend toward the amplifier unit 120 and the coil wiring portion 130 to have a length corresponding to the sensor substrate 141 .

[0079] In addition, the support body 151 is oriented in a direction perpendicular to the sensor substrate 141 , one side surface of the support body 151 can be fixed to the housing 111 , and the other side surface can support and fix the rear center axis of the sensor substrate 141 .

[0080] The supporting central protrusion 152 is formed on the other side surface of the supporting body 151 and can be formed at a position corresponding to the central hole 144. The supporting central protrusion 152 can be clamped and engaged with the central hole 144.

[0081] The support edge protrusion 153 is formed on the other side surface of the support body 151 and can be formed at a position corresponding to the edge hole 145. The support edge protrusion 153 can be clamped and coupled to the edge hole 145.

[0082] The support portion 150 provided as described above can prevent the sensor portion 140 from being bent or deformed.

[0083] Specifically, since the sensor portion 140 is a thin-plate PCB substrate, when the housing 111 rotates at a high speed, it may bend or deform, and thus the displacement of the suspended body may not be accurately measured.

[0084] However, in the present invention, the support portion 150 supports the central longitudinal axis of the sensor portion 140 , thereby preventing the sensor portion 140 from being deformed.

[0085] The reinforcement portion 160 is configured to be connected to the coil wiring portion 130 and the amplifier unit 120 at both ends, and includes a reinforcement vertical body 161 and a reinforcement connecting body 162 .

[0086] Both ends of the reinforcing vertical body 161 may be extended toward the coil wiring portion 130 and the amplifier unit 120 .

[0087] The reinforcement coupling body 162 is formed as a pair at both ends of the reinforcement vertical body 161 and may be disposed to be coupled to the coil wiring portion 130 and the amplifier unit 120 , respectively.

[0088] As described above, in the magnetic bearing 100 with a common position eddy current displacement sensor according to the first embodiment, the shell 111 is initially combined with the coil wiring portion 130 and the amplifier unit 120 through the vertical frame 113 and the horizontal frame 114, and the coil wiring portion 130 and the amplifier unit 120 are secondarily combined through the reinforcement portion 160, thereby improving durability.

[0089] Furthermore, the sensor unit 140 is also positioned inside the electromagnet unit 110 without deformation due to the coupling, and can accurately measure the displacement of the suspension coaxially with the suspension.

[0090] Figure 7 This is a perspective view of the amplifier unit side of a magnetic bearing equipped with a common position eddy current displacement sensor according to a second embodiment of the present invention. Figure 8 This is a perspective view of the coil wiring portion side of a magnetic bearing including a common position eddy current displacement sensor according to a second embodiment of the present invention.

[0091] Figure 9 This is a perspective view of a magnetic bearing with a common position eddy current displacement sensor according to a second embodiment of the present invention, with the amplifier unit removed. Figure 10 This is a perspective view of an enlarged sensor portion of a magnetic bearing equipped with a common position eddy current displacement sensor according to a second embodiment of the present invention.Figure 11 This is a perspective view of a sensor unit according to a second embodiment of the present invention.

[0092] Reference Figures 7 to 11 The magnetic bearing 200 with the common position eddy current displacement sensor according to the second embodiment includes an electromagnet portion 210 , an amplifier unit 220 , a coil wiring portion 230 , a sensor portion 240 , and a support portion 250 .

[0093] The electromagnet portion 210 includes a housing 211 , an electromagnet 212 , and a column portion 213 .

[0094] The housing 211 may be formed by a circular frame having a hollow interior.

[0095] The electromagnet 212 may be disposed in plurality along the inner periphery of the housing 211 , and may be composed of an electromagnet and a permanent magnet, thereby generating magnetic force as current flows.

[0096] The suspension may be configured to rotate while being suspended in the inner hollow portion of the housing 211 by the electromagnet 212 .

[0097] The pillar portion 213 may be disposed between the housing 211 and the coil wiring portion 230 .

[0098] Specifically, the pillars 213 may be formed at predetermined intervals along the other side surface of the housing 211 .

[0099] The pillar portion 213 provided as described above can securely couple the housing 211 and the coil wiring portion 230 .

[0100] Although not shown, the pillar portion 213 may be further provided between the housing 211 and the amplifier unit 220 .

[0101] The amplifier unit 220 may be coupled to one side of the electromagnet portion 210 . The amplifier unit 220 may be made of a PCB and may be configured in a hollow circular disk shape corresponding to the shape of the housing 211 .

[0102] The coil wiring portion 230 may be coupled to the other side of the electromagnet portion 210 . The coil wiring portion 230 may be made of a PCB and may be configured in a hollow circular disk shape corresponding to the shape of the housing 211 .

[0103] The sensor unit 240 is configured such that both ends thereof are coupled to the coil wiring unit 230 and the amplifier unit 220 , respectively, so as to be located inside the electromagnet unit 210 , and a plurality of sensor units may be provided.

[0104] Specifically, each of the sensor units 240 is disposed in front of a pair of electromagnets 212 and can be disposed at predetermined intervals.

[0105] The sensor unit 240 is disposed coaxially with the suspended body suspended inside the electromagnet unit 210 to measure the displacement of the suspended body, and an eddy current displacement sensor or the like may be used.

[0106] More specifically, the sensor portion 240 includes a sensor substrate 241 , a sensor coil 242 , a protrusion 243 , a central hole 244 , and edge holes 245 .

[0107] The sensor substrate 241 may be formed of a PCB and may be extended toward the amplifier unit 220 and the coil wiring portion 230 . In this case, the sensor substrate 241 may be extended to be longer than the electromagnet 212 .

[0108] Furthermore, the sensor substrate 241 can be positioned between adjacent electromagnets 212 in a manner parallel to a tangent line at any point on the outer circumference of the inner central axis of the electromagnet portion 210. The sensor substrate 241 positioned in this manner can better measure the displacement of a suspended object suspended within the inner central axis of the electromagnet portion 210.

[0109] The sensor coil 242 is formed on the sensor substrate 241 and may be composed of an eddy current sensor coil.

[0110] The protrusions 243 may be formed to protrude from four corners of the sensor substrate 241 along a longitudinal direction of the sensor substrate 241 .

[0111] The protrusion 243 provided as described above may be disposed so as to be clamped and coupled to holes formed in the coil wiring portion 230 and the amplifier unit 220 .

[0112] The central hole 244 may be formed in a hole shape at the center of the sensor substrate 241. Here, the central hole 244 may extend along the longitudinal direction of the sensor substrate 241 to have a predetermined length and may be located at the center of the sensor substrate 241 in the width direction.

[0113] The edge holes 245 may be formed at both ends of the sensor substrate 241 in the longitudinal direction. That is, the edge holes 245 may be located on the same line as the central hole 244 .

[0114] The support part 250 is coupled between the sensor part 240 and the housing 211, and can extend to have a length corresponding to the sensor part 240. Also, the support part 250 can be disposed in a direction perpendicular to the sensor part 240.

[0115] More specifically, the support part 250 includes a support body 251, a support central protrusion 252, a support edge protrusion 253, and a support coupling 254.

[0116] The support body 251 constitutes a main body of the support part 250, and can extend to the amplifier unit 220 and the coil wiring part 230 to have a length corresponding to the sensor substrate 241.

[0117] Also, the support body 251 is oriented in a direction perpendicular to the sensor substrate 241, and one side surface can be fixed to the housing 211, and the other side surface can support a center axis of the back surface of the sensor substrate 241 and be fixed.

[0118] The support central protrusion 252 is formed on the other side surface of the support body 251, and can be formed at a position corresponding to the central hole 244. The support central protrusion 252 as described above can be tightly coupled to the central hole 244.

[0119] The support edge protrusion 253 is formed on the other side surface of the support body 251, and can be formed at a position corresponding to the edge hole 245. The support edge protrusion 253 as described above can be tightly coupled to the edge hole 245.

[0120] The support part 250 as described above can prevent the sensor part 240 from being bent or deformed.

[0121] Specifically, the sensor part 240 is a PCB substrate constituted in a thin plate shape, and thus in a case where the housing 211 rotates at a high speed, it can be impossible to accurately measure displacement of the levitation body as the sensor part 240 is bent or deformed.

[0122] However, the present application is configured such that the support part 250 supports a central longitudinal axis of the sensor part 240, and thus can prevent the sensor part 240 from being deformed.

[0123] Also, the sensor part 240 is positioned inside the electromagnet part 210 without deformation by the coupling, and thus can accurately measure displacement of the levitation body coaxially with the levitation body.

[0124] Figure 12This is a perspective view of a disassembled amplifier unit of a magnetic bearing having a common position eddy current displacement sensor according to a third embodiment of the present invention. Figure 13 This is a perspective view of the coil wiring portion side of a magnetic bearing including a common position eddy current displacement sensor according to a third embodiment of the present invention.

[0125] Figure 14 This is a perspective view of an enlarged sensor portion of a magnetic bearing equipped with a common position eddy current displacement sensor according to a third embodiment of the present invention. Figure 15 This is a perspective view of a sensor unit according to a third embodiment of the present invention.

[0126] Reference Figures 12 to 15 The magnetic bearing 300 with the common position eddy current displacement sensor according to the third embodiment includes an electromagnet portion 310 , an amplifier unit 320 , a coil wiring portion 330 , a sensor portion 340 , and a coupling portion 350 .

[0127] The electromagnet portion 310 includes a housing 311 , an electromagnet 312 , a vertical frame 313 , and a horizontal frame 314 .

[0128] The housing 311 may be formed of a circular frame having a hollow interior.

[0129] The electromagnet 312 may be disposed in plurality along the inner periphery of the housing 311 , and may be composed of an electromagnet and a permanent magnet, thereby generating magnetic force as current flows.

[0130] The suspension may be configured to rotate while being suspended in the inner hollow portion of the housing 311 by the electromagnet 312 .

[0131] The vertical frame 313 is disposed between the housing 311 and the electromagnet 312 and may be extended toward the coil wiring portion 330 and the amplifier unit 320 .

[0132] Specifically, the vertical frame 313 may extend toward the housing 311 and the coil wiring portion 330 , and toward the housing 311 and the amplifier unit 320 .

[0133] In addition, the vertical frame 313 may be formed to extend toward the coil wiring portion 330 and the amplifier unit 320 .

[0134] The horizontal frame 314 is formed at an end portion of the vertical frame 313 and may be configured to be coupled with the coil wiring portion 330 and the amplifier unit 320 .

[0135] Specifically, the horizontal frame 314 may be formed to extend from an end portion of the vertical frame 313 to have a predetermined length in a direction parallel to the coil wiring portion 330 and the amplifier unit 320 .

[0136] The housing 311 and the amplifier unit 320 , as well as the housing 311 and the coil wiring portion 330 , can be fixedly coupled together by the vertical frame 313 and the horizontal frame 314 .

[0137] The amplifier unit 320 may be coupled to one side of the electromagnet portion 310 . The amplifier unit 320 may be made of a PCB and may be configured in a hollow circular disk shape corresponding to the shape of the housing 311 .

[0138] The coil wiring portion 330 may be coupled to the other side of the electromagnet portion 310 . The coil wiring portion 330 may be made of a PCB and may be configured in a hollow circular disk shape corresponding to the shape of the housing 311 .

[0139] The sensor unit 340 is configured such that both ends thereof are connected to the coil wiring unit 330 and the amplifier unit 320 , respectively, so as to be located inside the electromagnet unit 310 , and a plurality of sensor units may be provided.

[0140] Specifically, each of the sensor units 340 is disposed in front of a pair of electromagnets 312 and can be disposed at predetermined intervals.

[0141] The sensor unit 340 is disposed coaxially with the suspended body suspended inside the electromagnet unit 310 to measure the displacement of the suspended body, and an eddy current displacement sensor or the like may be used.

[0142] More specifically, the sensor portion 340 includes a sensor substrate 341 , a sensor coil 342 , and a clamping hole 343 .

[0143] The sensor substrate 341 may be formed of a PCB and may be extended toward the amplifier unit 320 and the coil wiring portion 330 . In this case, the sensor substrate 341 may be extended to be longer than the electromagnet 312 .

[0144] Furthermore, the sensor substrate 341 can be positioned between adjacent electromagnets 312 in a manner parallel to a tangent line at any point on the outer circumference of the inner central axis of the electromagnet portion 310. The sensor substrate 341 configured as described above can better measure the displacement of a suspended object suspended within the inner central axis of the electromagnet portion 310.

[0145] The sensor coil 342 is formed on the sensor substrate 341 and can be composed of an eddy current sensor coil.

[0146] The clamping holes 343 are formed at four corners of the sensor substrate 341 and may be formed in a hole shape. In this case, the clamping holes 343 may be formed to extend longer in the width direction than in the length direction of the sensor substrate 341 .

[0147] The coupling portion 350 may be configured to further couple and fix the sensor portion to the horizontal frame 314 , and may include a coupling body 351 , a clamping body 352 , and a fixing body 353 .

[0148] The coupling body 351 forms a main body of the coupling portion 350 and may be extended in a direction parallel to the sensor substrate 341 .

[0149] The clamping bodies 352 may be formed to extend from both ends of the coupling body 351 toward the adjacent clamping holes 343 . The clamping bodies 352 provided as described above may be clamped and coupled to the clamping holes 343 .

[0150] The fixing body 353 may be extended from both ends of the connecting body 351 to be connected to the adjacent horizontal frames 314 .

[0151] The sensor portion 340 may be stably supported and fixed by the fixing body 353 being clamped and coupled to the clamping holes 343 formed at four corners of the sensor portion 340 .

[0152] More specifically, the fixing body 353 is coupled to a lower side of the horizontal frame 314 , and the coil wiring portion 330 or the amplifier unit 320 can be coupled to an upper side of the horizontal frame 314 .

[0153] The coupling portion 350 provided as described above can prevent the sensor portion 340 from being bent or deformed.

[0154] Specifically, the sensor portion 340 is a PCB substrate formed in a thin disk shape. Therefore, when the housing 311 rotates at a high speed, it may bend or deform, and thus may not be able to accurately measure the displacement of the suspension.

[0155] However, in the present invention, the coupling portion 350 supports the four corners of the sensor portion 340 , thereby preventing the sensor portion 340 from being deformed.

[0156] According to the present invention configured as described above, the sensor portion 340 is located inside the electromagnet portion 110 , thereby reducing the sensor installation space and manufacturing costs and reducing the sensor noise problem.

[0157] In addition, the present invention assembles the sensor part 340 by clamping, so it can be easily assembled and separated.

[0158] Furthermore, in the present invention, since the sensor portion 340 is located on the same central axis as the suspension, the displacement measurement accuracy can be improved.

[0159] It should be understood that the above description of the present invention is for illustrative purposes only, and that those skilled in the art can easily adapt the present invention to other specific embodiments without changing the technical concept or essential features of the present invention. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described in a single form can also be implemented in a dispersed manner, and similarly, components described in a dispersed manner can also be implemented in a combined manner.

[0160] The scope of the present invention is indicated by the claims, and it should be interpreted that all changes and modifications derived from the meaning and scope of the claims and their equivalents are included within the scope of the present invention.

[0161] Description of Reference Numerals

[0162] 1: Conventional magnetic bearings

[0163] 2: Bearing

[0164] 3: Sensor

[0165] 100: Magnetic bearing with common position eddy current displacement sensor based on the first embodiment

[0166] 110: Electromagnet

[0167] 111: Shell

[0168] 112: Electromagnet

[0169] 113: Vertical Frame

[0170] 114: Horizontal frame

[0171] 120: Amplifier unit

[0172] 130: Coil wiring part

[0173] 140: Sensor unit

[0174] 141: Sensor substrate

[0175] 142: Sensor coil

[0176] 143: Protrusion

[0177] 144: Central hole

[0178] 145: Edge hole

[0179] 150: Supporting part

[0180] 151: Support body

[0181] 152: Supporting central protrusion

[0182] 153: Support edge protrusion

[0183] 154: Support combination

[0184] 160: Strengthening Department

[0185] 161: Strengthen the vertical body

[0186] 162: Strengthen the combination

[0187] 200: Magnetic bearing with common position eddy current displacement sensor based on the second embodiment

[0188] 210: Electromagnet

[0189] 211: Shell

[0190] 212: Electromagnet

[0191] 213: Pillar Department

[0192] 220: Amplifier Unit

[0193] 230: Coil wiring part

[0194] 240: Sensor Department

[0195] 241: Sensor substrate

[0196] 242: Sensor coil

[0197] 243: Protrusion

[0198] 244: Central hole

[0199] 245: Edge hole

[0200] 250: Supporting part

[0201] 251: Support body

[0202] 252: Supporting central protrusion

[0203] 253: Support edge protrusion

[0204] 254: Support combination

[0205] 300: Magnetic bearing with common position eddy current displacement sensor based on the third embodiment

[0206] 310: Electromagnet

[0207] 311: Shell

[0208] 312: Electromagnet

[0209] 313: Vertical Frame

[0210] 314: Horizontal Frame

[0211] 320: Amplifier Unit

[0212] 330: Coil wiring part

[0213] 340: Sensor Department

[0214] 341: Sensor substrate

[0215] 342: Sensor coil

[0216] 343: Clamping hole

[0217] 350: Joint

[0218] 351: Combined with the subject

[0219] 352: Clamping body

[0220] 353: Fixed body

Claims

1. A magnetic bearing with a common position eddy current displacement sensor, characterized in that: Include: The electromagnet part comprises a circular shell having a hollow interior and a plurality of electromagnets arranged along the inner periphery of the shell. The amplifier unit is coupled to one side of the electromagnet portion, a coil wiring portion coupled to the other side of the electromagnet portion, and A plurality of sensor portions are arranged along the inner periphery of the electromagnet portion, and two end portions thereof are respectively coupled to the coil wiring portion and the amplifier unit and arranged between the coil wiring portion and the amplifier unit; The sensor unit includes: The sensor substrate, consisting of a PCB, and a sensor coil formed on the sensor substrate; The sensor substrate is located between adjacent electromagnets so as to be arranged parallel to a tangential direction at any point of the outer peripheral surface of the inner central axis of the electromagnet portion. The sensor portion is configured to measure a displacement of the suspended body at the same position as the suspended body suspended inside the electromagnet portion.

2. The magnetic bearing with a common position eddy current displacement sensor according to claim 1, characterized in that: The electromagnet portion comprises: a vertical frame disposed between the housing and the electromagnet and extending toward the coil wiring portion and the amplifier unit; and A horizontal frame is formed at an end portion of the vertical frame and is configured to be coupled to the coil wiring portion and the amplifier unit.

3. The magnetic bearing with a common position eddy current displacement sensor according to claim 1, characterized in that: The sensor unit further includes: The protrusions are formed from the four corners of the sensor substrate along the length direction of the sensor substrate. The protrusion is configured to be clamped and coupled to holes formed in the coil wiring portion and the amplifier unit.

4. The magnetic bearing with a common position eddy current displacement sensor according to claim 1, characterized in that: The magnetic bearing with the common position eddy current displacement sensor further includes a support portion, which is connected between the sensor portion and the housing and extends to have a length corresponding to the sensor portion. The support portion is arranged in a direction perpendicular to the sensor portion.

5. The magnetic bearing with a common position eddy current displacement sensor according to claim 4, characterized in that: The sensor unit includes: a central hole formed in the center of the sensor substrate formed of the PCB; and Edge holes are formed at both ends of the sensor substrate in the longitudinal direction. The sensor portion is configured such that the support portion is clamped and coupled to the central hole and the edge hole.

6. The magnetic bearing with co-located eddy current displacement sensors according to claim 1, wherein: The magnetic bearing equipped with the common position eddy current displacement sensor further includes a reinforcement portion configured so that both ends of the reinforcement portion are connected to the coil wiring portion and the amplifier unit.

7. The magnetic bearing with co-located eddy current displacement sensors according to claim 1, characterized in that: The electromagnet portion further includes a column portion, the column portion being arranged between the housing and the coil wiring portion. A plurality of the pillars are arranged around the other side surface of the housing.

8. The magnetic bearing with a common position eddy current displacement sensor according to claim 2, characterized in that: The magnetic bearing with the common position eddy current displacement sensor further includes a coupling portion configured to further couple and fix the sensor portion on the horizontal frame.

9. The magnetic bearing with a common position eddy current displacement sensor according to claim 8, characterized in that: The sensor unit further includes: Clamping holes are formed at four corners of the sensor substrate.

10. The magnetic bearing with co-located eddy current displacement sensors according to claim 9, characterized in that: The joint portion comprises: Combining the main body to form a main body, which is extended in a direction parallel to the sensor substrate; A pair of clamping bodies, extending from both ends of the coupling body toward adjacent clamping holes, and clamped and coupled to the clamping holes; as well as A pair of fixing bodies are respectively extended from two ends of the combining body to be combined with the adjacent horizontal frames.

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