Eccentricity measurement system

Abstract

Eccentricity measuring system applied to a motor system comprising a stator and a rotor, and measuring the eccentricity of the rotor, wherein the eccentricity measuring system comprises: an eccentricity measuring sensor adapted to a pole shoe of the stator and designed to measure the presence or absence of rotor eccentricity by measuring a change in the magnetic field generated between the rotor and the stator; a first detection connection which is formed integrally with a connection arrangement of the stator and is designed to transmit detection information from the eccentricity measuring sensor to the outside; a second sensing port having a surface adjacent to an axial distal end face of the stator, wherein the second sensing port is configured to transmit sensing information from the eccentricity measuring sensor to the first sensing port; and a connecting substrate designed to electrically connect the first detection port and the second detection port.

Description

Background of the Revelation; Area of ​​the Revelation

[0001] The present disclosure relates to an eccentricity measuring system and, in particular, to an eccentricity measuring system configured to measure an eccentricity occurring in a motor rotor. Description of the related prior art

[0002] Reflective laser displacement sensors are widely used for measuring the rotor eccentricities of permanent magnet electric motors. This method measures changes in distance by directly irradiating a rotating shaft with laser beams. The method has the advantage of being intuitively understandable and applicable to various rotating devices. Furthermore, transmitted light micrometers or transmitted light 2D micrometers are also used in industrial settings.

[0003] However, if the outer diameter of a rotor core (other than the shaft) is to be measured when a reflective laser displacement sensor is applied to a permanent magnet electric motor according to the prior art, a sensor must be mounted outside the motor housing, and a surface of the rotor core must be illuminated with laser beams. Since the rotor core is obscured by a stator within the motor's structure, the laser beams cannot penetrate the core, and the measurement cannot be performed. In particular, there is a problem in that it is difficult to measure static eccentricity, as it is impossible to measure radial displacement at a single point.

[0004] For this reason, it is necessary to provide at least two or more sensors on two opposite sides, even if a section of the shaft is not covered by the stator core. In this case, the sensor can interfere with other external components, which limits the sensor mounting structure and increases the system's cost. State of the art document

[0005] [Patent document] Japanese patent no. 6441757 “Eccentricity Direction Detection Device and Variable Gap Motor” (“Device for detecting the eccentricity direction and motor with variable gap”) Summary of Revelation

[0006] The present disclosure is proposed to solve these problems and aims to provide an eccentricity measurement system comprising an eccentricity measurement sensor mounted in a motor and configured to measure tilting eccentricity, static eccentricity, and dynamic eccentricity of a rotor using a change in the magnetic field generated between the rotor and a stator, thereby overcoming a limitation of a prior art method using a reflective laser sensor, reducing costs compared to the prior art reflective laser sensor, detecting an eccentricity factor that most significantly affects the noise and vibration of a rotating device, detecting a defect at an early stage of mass production to prevent the shipment of potentially defective products, and measuring an eccentricity.which is caused by abrasion or similar after product durability tests or after prolonged operation of a vehicle, in order to identify a problem in advance and take preventative action such as repair.

[0007] With the eccentricity measurement system described above, if applied to autonomous vehicles in the future, it will be possible to monitor the mechanical condition of a rotary device, apply the eccentricity measurement system to an intelligent rotary device system capable of evaluating its condition using a pre-established defect level index, and detect the condition of the rotary device in a range imperceptible to humans. Furthermore, the eccentricity measurement system can be applied in cases where it is difficult to detect the condition of an individual rotary device due to external vibration or noise. Thus, the eccentricity measurement system can be used to proactively detect and address problems in an electric motor used in urban air mobility (UAM) aircraft.

[0008] To achieve the above-mentioned objective, an embodiment of the present disclosure provides an eccentricity measuring system applied to a motor system comprising a stator and a rotor, and measuring the eccentricity of the rotor, wherein the eccentricity measuring system comprises: an eccentricity measuring sensor adapted to a pole shoe of the stator and configured to measure the presence or absence of eccentricity of the rotor by measuring a change in the magnetic field generated between the rotor and the stator; a first sensing terminal formed integrally with a terminal arrangement of the stator and configured to transmit sensing information from the eccentricity measuring sensor to the outside;a second sensing port having a surface adjacent to an axial distal end face of the stator, wherein the second sensing port is configured to transmit sensing information from the eccentricity measuring sensor to the first sensing port; and a connecting substrate configured to electrically connect the first sensing port and the second sensing port.

[0009] Furthermore, the first sensing terminal may comprise: an integrated housing formed by overmolding with a predetermined electrode pattern, integrally formed with the stator terminal arrangement and made of an insulating material; and an external terminal into which the electrode pattern is inserted and an electrode of an external component is inserted, and the integrated housing may include an arc section formed in an arc shape along a circumferential edge of the stator.

[0010] Furthermore, the second sensing connection may comprise: a flat, plate-like substrate part electrically connected to the eccentricity measuring sensor and comprising a circuit pattern printed on a surface; and a mounting part formed in a shape corresponding to the substrate part, comprising a predetermined receiving space configured to receive the substrate part, having a partition formed along an edge of the receiving space, having a surface adjacent to an axial distal end face of the stator, and being made of an insulating material.

[0011] Furthermore, the eccentricity measuring sensor can include a pin extending towards the second sensing terminal, and the substrate part can include a through-hole formed by a surface adjacent to the eccentricity measuring sensor, the through-hole being configured to allow the pin to be fitted into the through-hole and soldered.

[0012] Furthermore, the substrate part can include: a ring section formed in a ring shape along the circumferential edge of the stator; and a sensor connection section extending in a radial direction from the ring section towards the eccentricity measuring sensor.

[0013] Furthermore, the connection substrate may comprise: a first connection part provided at one end and electrically connected to the first sensing terminal; a second connection part provided at the other end and electrically connected to the second sensing terminal; and a signal transmission part electrically connected to the first and second connection parts and incorporating an embedded wiring circuit.

[0014] Furthermore, the first sensing terminal can include a first internal terminal electrically connected to the electrode pattern and formed to extend outwards to the outside of the arc section; the integrated housing can include a first connector insertion groove projecting from a surface of the ring section, formed outside the first internal terminal and having an internal surface shape corresponding to an external surface shape of the first connecting part; and the first connecting part can be a connector comprising a groove formed concave in an axial direction such that the first internal terminal is inserted into the groove.

[0015] Furthermore, the second detection port can include a second internal port electrically connected to the circuit pattern; the substrate part can include a second connector insertion groove formed concavely radially inward along an outer circumferential surface of the second internal port; the mounting part can be formed such that the partition in an area corresponding to an area where the second connector insertion groove is formed is lower than the partition in an area corresponding to an area where the second connector insertion groove is not formed; and the second connection part can be a connector comprising a groove formed concavely in the radial direction so that the second internal port is inserted into the groove.

[0016] Furthermore, the mounting part may include at least one fixing section extending from an inner surface of the receiving space and designed to fix a position of the substrate part.

[0017] Furthermore, the fixing section can include a first projecting section comprising a curved surface with a predetermined curvature, and the width of a side of the first projecting section adjacent to the stator and the width of a side of the first projecting section not adjacent to the stator can be equal to each other.

[0018] Furthermore, the fixing section may include a second projecting section comprising a curved surface with a predetermined curvature, and the width of a side of the second projecting section that does not adjoin the stator may be smaller than the width of a side of the second projecting section that does adjoin the stator.

[0019] Furthermore, the fixing section may include: a springback section extending from the inner surface of the receiving space of the mounting part; and a projection extending from a distal end of the springback section to abut a surface of the substrate part.

[0020] Furthermore, the eccentricity measuring sensor can be provided as two or more eccentricity measuring sensors arranged in the stator, and the respective eccentricity measuring sensors can be arranged so that they are spaced equally apart from each other.

[0021] Furthermore, the eccentricity measuring sensor can be provided as two or more eccentricity measuring sensors arranged in the stator and positioned so that they are spaced apart from each other while having a phase difference of 90 degrees. Brief description of the drawings Fig. Figure 1 is an overall perspective view showing a stator to which an eccentricity measurement system of the present disclosure is applied. Fig. Figure 2 is an overall perspective view showing the eccentricity measurement system of the present disclosure. Fig. Figure 3 is a front view showing an eccentricity measuring sensor of the present disclosure. Fig. Figure 4 is a perspective view showing an initial connection to the present disclosure. Fig. Figure 5 is a partial perspective view showing an external connection to the present disclosure. Fig. Figure 6 is a perspective view showing a substrate part of a second capture connection of the present disclosure. Fig. Figure 7 is a perspective view showing an assembly part of the second acquisition port of the present disclosure. Fig. Figure 8 is a partial perspective view showing a coupling relationship between the second detection port and the eccentricity measurement sensor of the present disclosure. Fig. Figure 9 is a partial perspective view showing a first embodiment of a fixing section of the present disclosure. Fig. Figure 10 is a partial perspective view showing a second embodiment of the fixing section of the present disclosure. Fig. Figure 11 is a partial perspective view showing a third embodiment of the fixing section of the present disclosure. Fig. Figure 12 is a perspective view showing a compound substrate of the present disclosure. Fig. Figure 13 is a partial perspective view showing a first internal connection of the present revelation. Fig. Figure 14 is a partial perspective view showing a second internal connection of the present revelation. Fig. Figure 15 is a partial perspective view showing a coupling relationship between the connection substrate, the first capture port and the second capture port of the present disclosure. Fig. Figures 16 to 18 are schematic views showing embodiments of an arrangement of the eccentricity measuring sensor of the present disclosure. Fig. 19 and Fig. Figure 20 are schematic views showing a positional relationship between a rotor and the eccentricity measuring sensor in the case of tilting eccentricity. Fig. Figure 21 is a schematic view showing a positional relationship between the rotor and the eccentricity measuring sensor in the case of a static eccentricity. Fig. Figure 22 is a schematic view showing a positional relationship between the rotor and the eccentricity measuring sensor in the case of dynamic eccentricity. Fig. 23 and Fig. Figure 24 are schematic views showing graphs of magnetic flux magnitudes measured by two eccentricity measurement sensors in the case of a tilting eccentricity. Fig. Figure 25 is a schematic view showing graphs of the magnetic flux amounts measured by the two eccentricity measurement sensors in the case of static eccentricity. Fig. Figure 26 is a schematic view showing graphs of the magnetic flux amounts measured by the two eccentricity measurement sensors in the case of dynamic eccentricity. Detailed description of the revelation

[0022] The technical teaching of the present disclosure is described in more detail below with reference to the accompanying drawings. Furthermore, terms or words used in the description and claims should not be interpreted as being limited to a general or lexical meaning, but should be interpreted as having a meaning and a concept that corresponds to the technical teaching of the present disclosure, based on the principle that an inventor can adequately define a concept of a term in order to describe his / her own disclosure by the best possible means.

[0023] A basic configuration of an eccentricity measurement system 1000 of the present disclosure is described below with reference to Fig. 1 to 3 described.

[0024] The eccentricity measuring system 1000 of the present disclosure can be applied to a motor system comprising a stator S and a rotor R, and can measure the eccentricity of the rotor R. As described in Fig. As shown in Figure 1, the eccentricity measurement system can comprise 1000 eccentricity measurement sensors 100, a first sensing port 200, a second sensing port 300, and a connecting substrate 400. The eccentricity measurement sensor 100 can be adapted to a pole shoe of the stator S and measure the presence or absence of eccentricity of the rotor R using a change in the magnetic field generated between the rotor R and the stator S. More precisely, the eccentricity measurement sensor can be a magnetic flux sensor provided such that one surface of it faces the rotor R, and an induced electromotive force is generated in a region that includes an upper end R1 and a lower end R2 of the rotor R based on an axial direction.

[0025] As in Fig. As shown in Figure 2, the first sensing terminal 200 can further be integrated with a terminal assembly T of the stator S and transmit sensing information from the eccentricity measuring sensor 100 to the outside. The second sensing terminal 300 can be electrically and structurally connected to the eccentricity measuring sensor 100, mounted on a surface perpendicular to an axis of the stator S, and configured to transmit sensing information from the eccentricity measuring sensor 100 to the first sensing terminal 200. Furthermore, the connecting substrate 400 can electrically connect the first sensing terminal 200 and the second sensing terminal 300. In this case, the connecting substrate 400 can be provided between the first sensing terminal 200 and the second sensing terminal 300, i.e., between the terminal assembly T and the stator S.Furthermore, the first sensing terminal 200 and the second sensing terminal 300 can each be formed in an arc or ring shape. Therefore, motor coils wound around the first sensing terminal 200, the second sensing terminal 300, and the stator S may not interfere with each other. Since the two sensing terminals, i.e., the first sensing terminal 200 and the second sensing terminal 300, are included as described above, the first sensing terminal 200, the terminal assembly T, the second sensing terminal 300, and the eccentricity measuring sensor 100 can be pre-assembled and attached to the stator S. Then, the first sensing terminal 200 and the second sensing terminal 300 can be connected to the connecting substrate 400, further simplifying the assembly process and significantly reducing the probability of a defect.

[0026] Furthermore, since the first sensing port 200 and the second sensing port 300 are included, it is possible to easily transmit measurement information obtained by the eccentricity sensor 100 to an external controller. Therefore, an induced electromotive force signal generated in the sensor coils 120 of the eccentricity sensor 100 can be analyzed, and the presence or absence of rotor eccentricity R can be detected.Since the connection substrate 400, a separate component designed to electrically connect the sensing port and the eccentricity measuring sensor 100, is included, the sensing port, which extends circumferentially, and the eccentricity measuring sensor 100, which extends axially, can be mounted separately and temporarily on the stator S and then connected to the connection substrate 400. This maximizes ease of assembly.

[0027] More precisely, as in Fig. As shown in Figure 3, the eccentricity measuring sensor 100 comprises a sensor housing 110 having an insertion hole 111 that is formed to penetrate the stator pole shoe S, allowing the pole shoe of the stator S to be fitted into the insertion hole 111. More precisely, the sensor housing 110 of the eccentricity measuring sensor 100 can be coupled to the pole shoe of the stator S in the radial direction and fitted radially within the stator S. The insertion hole 111 can be formed in a shape identical to a surface perpendicular to the radial direction of the pole shoe of the stator S, and the sensor housing 110 can be formed in a square ring shape along an edge of the surface perpendicular to the radial direction of the pole shoe of the stator S. The eccentricity measuring sensor 100 can be inserted into a motor housing as described above, thereby minimizing interference with other components.

[0028] Furthermore, the eccentricity measuring sensor 100 of the present disclosure can comprise the sensor coils 120 and pins 130. The sensor coil 120 can be wound around the sensor housing 110 and generate a magnetic field between the sensor coil 120 and the rotor R. More precisely, the sensor coils 120 can be arranged such that they extend along the outer circumferences of a surface of the pole shoe of the stator S and a surface of the rotor R facing each other.Therefore, the sensor coil 120 can generate an induced electromotive force by a change in the magnetic field generated in a direction perpendicular to a surface of the pole shoe of the stator S facing a side face of the rotor R, and the eccentricity measuring sensor 100 can reliably measure a change in the induced electromotive force by magnetic induction by means of a change in the magnetic field generated in all areas above the upper end R1 of the rotor and the lower end R2 of the rotor (based on the axial direction), so that a magnetic flux is generated in the radial direction, thereby measuring tilting eccentricity, static eccentricity and dynamic eccentricity.Furthermore, the pins 130 can be coupled to the sensor housing 110, protrude from a surface of the sensor housing 110, be electrically connected to the sensor coil 120 and transmit a magnetic field signal from the sensor coil 120 to the outside.

[0029] Furthermore, the sensor housing 110 of the eccentricity measuring sensor 100 can include a coil former section 112, which is a groove formed concavely along the outer circumferences of the surface of the stator pole shoe S and the surface of the rotor R facing each other, and the coil former section 112 has a surface adjacent to the sensor coil 120. The coil former section 112 can be formed such that the depth of its center, based on the radial direction, is deeper than the depth of its outer circumference, also based on the radial direction. For example, the surface adjacent to the sensor coil 120 can be formed in a round (U-shape) or V-shape. Therefore, the sensor coil 120, which is wound around the coil former section 112, can be positioned at the center of the coil former section 112, i.e., at its center based on the radial direction.Therefore, even if the motor housing and stator S vibrate, the sensor coil 120 will not become disengaged, and the position of the sensor coil 120 can be maintained constantly, thus improving the accuracy of the eccentricity measurement. Furthermore, the sensor housing 110 can include projecting sections 113 extending from the insertion hole 111 towards the pole shoe of the stator S, with projecting surfaces adjacent to the pole shoe of the stator S. Because of the projecting section 113, the eccentricity measuring sensor 100 can be fixed to a radial distal end of the pole shoe of the stator S.

[0030] Furthermore, the eccentricity measuring sensor 100 can be fixed radially to the pole shoe of the stator S at an inner diameter position of the core of the stator S. Subsequently, the stator S and the eccentricity measuring sensor 100 can be fixed using an impregnating fluid when the stator S is impregnated. In this case, the impregnating fluid can be allowed to flow to the coil former section 112 of the eccentricity measuring sensor 100, so that the sensor coil 120 wound around the coil former section 112 can also be fixed simultaneously. Therefore, the eccentricity measuring sensor 100 can be moved towards an outer diameter section and completely prevented from being separated from the pole shoe of the stator S, thus improving the accuracy of the eccentricity measurement.

[0031] The first data acquisition connection 200 of the present disclosure will be described in more detail below with reference to Fig. 4 to 5 described.

[0032] As in Fig. As shown in Figure 4, the first sensing terminal 200 can comprise an electrode pattern 220, which is electrically connected to the eccentricity measuring sensor 100, and an integrated housing 210, which is formed with the electrode pattern 220 by overmolding. In this case, the integrated housing 210 can be manufactured simultaneously with the terminal arrangement T of the stator S, and the integrated housing 210 can be formed as a single component and made of an insulating material. For example, the integrated housing 210 can be a plastic housing. The electrode pattern 220, which is a conductor, is placed in a mold, and the integrated housing 210 can be formed together with the electrode pattern 220 by injection molding. The electrode pattern 220 can be manufactured by performing punching operations on a copper plate using a press.Since the integrated housing 210 is included, the position of the electrode pattern 220 can be fixed to a configuration of the connection arrangement T that has been provided in advance.

[0033] Furthermore, the integrated housing 210 can include an arc section 211 formed in an arc shape along a circumferential edge of the stator S. In this case, the center of the arc section 211 can coincide with an axis of rotation of the rotor R. Since the integrated housing 210 includes the arc section 211, it can be readily formed in one piece with the terminal arrangement T according to the prior art, thereby minimizing interference with the motor coil.

[0034] Furthermore, as in Fig. As shown in Figure 5, the integrated housing 210 includes an external port 230 into which a circuit pattern 311 is inserted and an electrode of an external component is inserted. The external port 230 can be formed by extending the electrode pattern 220 outwards in the radial direction of an annular section 313, and a plastic injection-molded part of the integrated housing 210 can be formed to surround the external port 230. Therefore, a connector or similar can be easily inserted into the external port 230 so that the sensing port and other components can be electrically connected and the sensing information can be easily transmitted to the outside.

[0035] The second data acquisition port 300 of the present disclosure will be described in more detail below with reference to Fig. 6 to 8 described.

[0036] As in Fig. As shown in Figure 6, the second sensing terminal 300 can comprise a flat, plate-like substrate part 310, which is electrically connected to the eccentricity measuring sensor 100 and includes the circuit pattern 311 printed on a surface. The substrate part 310 can be a printed circuit board (PCB) and include the circuit pattern 311 printed on a surface. The substrate part 310 can include the annular section 313, which is formed in a ring shape along the circumferential edge of the stator S, and sensor connection sections 314 that extend radially from the annular section 313 toward the eccentricity measuring sensor 100. Because the annular section 313 is included, it is possible to minimize interference between the sensing terminal and the wound motor coil.

[0037] Furthermore, as in Fig. As shown in Figure 7, the second detection port 300 comprises a mounting part 320 formed in a shape corresponding to the substrate part 310 and includes a predetermined receiving space 321 configured to receive the substrate part 310. The mounting part 320 can be made of an insulating material and have a surface adjacent to an axial distal end face of the stator S. The mounting part 320 can be an injection-molded plastic product and can be provided as an insulator. Therefore, the substrate part 310 and the stator S, which is made of steel, can be isolated from each other. Furthermore, the mounting part 320 allows the position of the substrate part 310 to be stably fixed on the stator S. In addition, the mounting part 320 can have a partition to support the position of the substrate part 310 along an edge of the receiving space 321.Furthermore, the mounting part 320 can also include a fixing section 322 that protrudes from an inner surface to more securely fix the position of the substrate part 310.

[0038] Furthermore, as in Fig. As shown in Figure 8, the eccentricity measuring sensor 100 includes pins 130 extending towards the second sensing terminal 300. The substrate part 310 can include through-holes 312 formed by a surface adjacent to the eccentricity measuring sensor 100, and the pins 130 can be fitted into the through-holes 312 and soldered. In this case, the substrate part 310 can be configured to extend over the eccentricity measuring sensor 100, the circuit pattern 311 can extend to the through-holes 312, and the pins 130 can be fitted into the through-holes 312 and coupled by soldering.In an example of the substrate part 310, if a plurality of eccentricity measuring sensors 100 are connected to a second sensing terminal 300, the sensor connection sections 314, the through holes 312, and the circuit patterns 311 coupled to the respective eccentricity measuring sensors 100 can be formed independently. One end of each of the circuit patterns 311 can be connected to the eccentricity measuring sensor 100, the other end of each of the circuit patterns 311 can extend toward the second internal terminal, and the circuit patterns 311 can be formed such that they do not interfere with each other.

[0039] As in Fig. As shown in Figures 9 to 11, the mounting part 320 can comprise at least one fixing section 322 extending from an inner surface of the receiving space 321 and configured to fix the position of the substrate part 310. More precisely, in a first embodiment of the fixing section 322, which is shown in Figures 9 to 11, the fixing section 322 can be configured to fix the position of the substrate part 310. Fig. As shown in Figure 9, the fixing section 322 comprises a first projecting section 322a, which includes a curved surface with a predetermined curvature. The width of a side of the first projecting section 322a adjacent to the stator and the width of a side of the first projecting section 322a not adjacent to the stator can be equal. Because the first projecting section 322a is included, the substrate part 310 can be captured by the first projecting section 322a without being separated. At least one first projecting section 322a can be formed on the ring section 313, and at least one first projecting section 322a can be formed on the sensor connection section 314.

[0040] Furthermore, in a second embodiment of the fixing section 322, which is described in Fig. As shown in Figure 10, the fixing section 322 includes a second projecting section 322b, which comprises a curved surface with a predetermined curvature. The width of a side of the second projecting section 322b that does not abut the stator may be smaller than the width of a side of the second projecting section 322b that does abut the stator. Because of the second projecting section 322b, the substrate part 310 can be captured by the second projecting section 322b without being separated. The draft angle can be applied as described above, thereby improving the fit between the substrate part 310 and the mounting part 320. In addition, at least one second projecting section 322b can be formed on the ring section 313, and at least one second projecting section 322b can be formed on the sensor connection section 314.

[0041] Furthermore, in a third embodiment of the fixing section 322, which is described in Fig. As shown in Figure 11, the fixing section 322 comprises a springback section 322c extending from the inner surface of the receiving space 321 of the mounting part 320, and a projection 322d extending from a distal end of the springback section 322c to abut a surface of the substrate part 310. Slots may be formed between the springback section 322c and a wall surface of the mounting part 320, allowing the springback section 322c itself to bend under slight pressure. The springback section 322c can be elastically deformed as it bends toward the outside of the mounting part 320 when pressure is applied to the projection 322d. Therefore, when the substrate part 310 is mounted in the receiving space 321 of the mounting part 320, the springback section 322c can be stretched outward to facilitate assembly.Once the substrate part 310 is mounted in the receiving space 321, no pressure is exerted on the springback section 322c, allowing the projection 322d and the substrate part 310 to be captured. The springback section 322c and the projection 322d can be used together with the first projecting section 322a and the second projecting section 322b, and the number of springback sections 322c and the number of projections 322d can be minimized. Therefore, it is possible to improve the fit between the substrate part 310 and the mounting part 320.

[0042] The coupling relationships between the connecting substrate 400 and the first acquisition port 200 and between the second acquisition port 300 and the connecting substrate 400 of the present disclosure are described below with reference to Fig. 12 to 15 described in more detail.

[0043] As in Fig. As shown in Figure 12, the connection substrate 400 can comprise a first connection part 410, provided at one end of the connection substrate 400 and electrically connected to the first detection port 200, and a second connection part 420, provided at the other end of the connection substrate 400 and electrically connected to the second detection port 300. Furthermore, the connection substrate 400 can comprise a signal transmission part 430 with two opposite ends, which are electrically connected to the first connection part 410 and the second connection part 420, and a wiring circuit can be embedded in the signal transmission part 430. The signal transmission part 430 can be an FPCB. Because the signal transmission part 430 is configured as an FPCB, the first detection port 200 and the second detection port 300, which are spaced apart from each other, can be more easily connected.

[0044] Furthermore, as in Fig. As shown in Figure 13, the first detection terminal 200 comprises first internal terminals 240 that are electrically connected to the electrode pattern and are configured to extend outwards to the outside of the arc section 211. More precisely, the first internal terminal 240 can be configured to extend axially outwards from the arc section 211. Furthermore, the integrated housing 210 can include a first connector insertion groove 212 that projects from a surface of the ring section 313, is formed outside the first internal terminals 240, and is configured to have an inner surface shape corresponding to an outer surface shape of the first connection part 410. In this case, the first connection part 410 can be a connector and include grooves that are concave in the axial direction, allowing the first internal terminals 240 to be inserted into the grooves.

[0045] Furthermore, as in Fig. As shown in Figure 14, the second sensing port 300 comprises second internal ports 330 that are electrically connected to the circuit pattern 311. In this case, the substrate part 310 can include second connector insertion slots 315 that are formed concavely radially inward along the outer circumferential surfaces of the second internal ports 330. Furthermore, the second connecting part 420 can be a connector and include slots that are formed concavely in the radial direction so that the second internal ports 330 are inserted into the slots. In addition, the mounting part 320 can be formed such that a partition in a region corresponding to a region where the second connector insertion slot 315 is formed is lower than a partition in a region corresponding to a region where the second connector insertion slot 315 is not formed.Therefore, the second connecting part 420, which is a connector, can easily be coupled to the second connector insertion groove 315 in the radial direction.

[0046] Therefore, as in Fig. Figure 15 shows the first connecting part 410 and the second connecting part 420 of the connecting substrate 400 each being mounted with the first sensing port 200 and the second sensing port 300, respectively, so that the eccentricity measuring sensor 100, the second sensing port 300, the first sensing port 200, and the external control can be electrically connected. With the above-mentioned configuration of the eccentricity measuring system 1000, the first sensing port 200, the connection arrangement T, the second sensing port 300, and the eccentricity measuring sensor 100 are pre-assembled and attached to the stator S, and then the first sensing port 200 and the second sensing port 300 can be connected to the connecting substrate 400, further simplifying the assembly process and significantly reducing the probability of a defect.

[0047] Embodiments of an arrangement of the eccentricity measuring sensor 100 of the present disclosure are described in more detail below with reference to Fig. 16 and Fig. 17 described.

[0048] As in Fig. 16 and Fig. As shown in Figure 17, two or more eccentricity measuring sensors 100 can be arranged in the stator S, and the respective eccentricity measuring sensors 100 can be arranged such that they are equidistant from one another. Since two or more eccentricity measuring sensors 100 are used, the eccentric state can be detected by comparing data between the sensors, in case it is difficult to detect reference data when no eccentricity is present. More precisely, as shown in Fig. Figure 16 shows that if three eccentricity measuring sensors 100 are used, the eccentricity measuring sensors 100 are positioned at positions with a phase difference of 120 degrees based on the stator S and the rotational axis of the rotor R. Alternatively, as shown in Fig. Figure 17 shows that if four eccentricity measuring sensors 100 are used, the eccentricity measuring sensors 100 can be positioned at positions with a phase difference of 90 degrees based on the stator S and the rotational axis of the rotor R. Similarly, if two eccentricity measuring sensors 100 are used, the eccentricity measuring sensors 100 can be positioned at positions with a phase difference of 180 degrees based on the stator S and the rotational axis of the rotor R.

[0049] Furthermore, as in Fig. Figure 18 shows that two or more eccentricity measuring sensors 100 are arranged in the stator S and are positioned such that they are spaced apart from each other while having a phase difference of 90 degrees. Therefore, the eccentric state can be detected by comparing data between the sensors, in case it is difficult to detect the reference data when no eccentricity is present.

[0050] Below, an algorithm for measuring the eccentricity of the rotor R using the eccentricity measuring sensor 100 of the present disclosure is described with reference to Fig. Described in sections 19 to 26.

[0051] As in Fig. As shown in Figure 19, if an eccentricity sensor 100 is used and the upper end R1 and the lower end R2 of the rotor are tilted equally in opposite (radial) directions (tilting eccentricity case 1), the magnetic flux on the side near the eccentricity sensor 100 can increase, and the magnetic flux on the side furthest from the eccentricity sensor 100 can decrease. That is, the total magnetic flux can change.

[0052] More precisely, if there is an eccentricity in a left / right direction in Fig. 19. An aspect is measured in which the magnetic flux increases at only one of the upper ends R1 or the lower end R2 of the rotor R, and decreases at the other of the upper end R1 or the lower end R2 of the rotor R. That is, it can be determined that if the magnetic flux increases at the upper end R1 of the rotor and decreases at the lower end R2 of the rotor, the upper end R1 of the rotor is inclined towards the eccentricity sensor 100. Conversely, it can be determined that the lower end R2 of the rotor is inclined towards the eccentricity sensor 100.

[0053] Furthermore, if an eccentricity in an upward / downward direction is present in Fig. 19 occurs when both the upper end R1 and the lower end R2 of the rotor R are located away from the eccentricity measuring sensor 100, so that the magnetic flux values ​​can decrease at both the upper end R1 and the lower end R2 of the rotor R. Therefore, it can be determined that the eccentricity occurs in a direction perpendicular to the direction in which the rotor R faces the eccentricity measuring sensor 100.

[0054] As in Fig. As shown in Figure 20, if an eccentricity measuring sensor 100 is used and only one of the upper end R1 and the lower end R2 of the rotor R is tilted (tilting eccentricity case 2), the tilted side of the rotor R approaches or moves away from the eccentricity measuring sensor 100, so that the amount of magnetic flux can increase or decrease.

[0055] More precisely, if an eccentricity occurs, an aspect can be measured in which the magnetic flux increases or decreases at only one of the upper ends R1 or the lower end R2 of the rotor R, while the magnetic flux at the other end R1 or R2 remains constant. That is, it can be determined that if the magnetic flux at the upper end R1 of the rotor increases or decreases while the magnetic flux at the lower end R2 remains constant, then the upper end R1 of the rotor is tilted. Conversely, it can be determined that the lower end R2 of the rotor is tilted.

[0056] As in Fig. As shown in Figure 21, if an eccentricity sensor 100 is used and both the upper end R1 and the lower end R2 of the rotor R are constantly eccentric, i.e., if the rotor R is eccentric in the radial direction (static eccentricity), both the upper end R1 and the lower end R2 of the rotor R approach or move away from the eccentricity sensor 100 in the same way, so that the amount of magnetic flux can increase or decrease. That is, it can be determined that the rotor R is statically eccentric towards the eccentricity sensor 100 if the amounts of magnetic flux at the upper end R1 and at the lower end R2 of the rotor increase simultaneously in the same way, and that the rotor R is statically eccentric in a direction away from the eccentricity sensor 100 if the amounts of magnetic flux at the upper end R1 and at the lower end R2 of the rotor decrease simultaneously in the same way.

[0057] Furthermore, as in Fig. Figure 22 shows that if an eccentricity sensor 100 is used and the value of an air gap changes over time (dynamic eccentricity), the amount of magnetic flux measured by the rotor R can change over time, and the cycle of the magnetic flux can also change. More precisely, as the rotor R approaches the eccentricity sensor 100, the amount of magnetic flux can increase at the same time that the cycle of the magnetic flux decreases. As the rotor R moves away from the eccentricity sensor 100 in the opposite direction, the amount of magnetic flux can decrease at the same time that the cycle of the magnetic flux increases.

[0058] Furthermore, as in Fig. Figure 23 shows that if two eccentricity measuring sensors 100 are used and the upper and lower sides of the rotor R are tilted equally in opposite (radial) directions (tilting eccentricity case 1), the magnetic flux on the side near the eccentricity measuring sensor 100 increases, and the magnetic flux on the side furthest from the eccentricity measuring sensor 100 decreases. That is, the total magnetic flux can change.

[0059] For example, if a first eccentricity sensor 100A and a second eccentricity sensor 100B are arranged such that they are spaced apart from each other with a phase difference of 180 degrees, and the tilting eccentricity of the rotor R occurs at both the first eccentricity sensor 100A and the second eccentricity sensor 100B, the magnetic flux magnitude may decrease partially compared to a reference magnetic flux magnitude determined when no eccentricity occurs at either the first eccentricity sensor 100A or the second eccentricity sensor 100B. This represents an aspect where the magnetic flux magnitude decreases as the upper end R1 or the lower end R2 of the rotor R moves away from the first eccentricity sensor 100A and the second eccentricity sensor 100B.

[0060] Furthermore, as in Fig. Figure 24 shows that if two eccentricity measuring sensors 100 are used and only one is tilted from the upper end R1 and the lower end R2 of the rotor R (tilting eccentricity case 2), the magnetic flux amount on the side near the eccentricity measuring sensor 100 increases, the magnetic flux amount on the side furthest from the eccentricity measuring sensor 100 decreases, and the magnetic flux amount on another side remains constant.For example, if the first eccentricity measuring sensor 100A and the second eccentricity measuring sensor 100B are arranged such that they are spaced apart from each other with a phase difference of 180 degrees, and the eccentricity of the upper end R1 of the rotor occurs such that the upper end R1 of the rotor approaches the second eccentricity measuring sensor 100B, the magnetic flux magnitude at the first eccentricity measuring sensor 100A may be partially smaller than a reference value, and the magnetic flux magnitude at the second eccentricity measuring sensor 100B may be partially larger than the reference value.

[0061] Furthermore, as in Fig. Figure 25 shows that if two eccentricity measuring sensors 100 are used and both the upper end R1 and the lower end R2 of the rotor R are constantly eccentric, i.e., if the rotor R is eccentric in the radial direction (static eccentricity), both the upper end R1 and the lower end R2 of the rotor R move towards or away from the eccentricity measuring sensor 100 in the same way, so that the amount of magnetic flux can increase or decrease. That is, the amounts of magnetic flux at the upper end R1 and at the lower end R2 of the rotor can increase simultaneously in the same way.For example, if the first eccentricity sensor 100A and the second eccentricity sensor 100B are arranged so that they are spaced apart from each other with a phase difference of 180 degrees, and the eccentricity of the rotor occurs such that the rotor approaches the second eccentricity sensor 100B, the magnetic flux magnitude at the first eccentricity sensor 100A may become significantly smaller than a reference value, and the magnetic flux magnitude at the second eccentricity sensor 100B may become significantly larger than the reference value.

[0062] Furthermore, as in Fig.Figure 26 shows that if two eccentricity sensors 100 are used and the value of an air gap changes over time (dynamic eccentricity), the amount of magnetic flux measured by the rotor R can change over time, and both the rotation angle and the amount of magnetic flux can change over time. For example, if the first eccentricity sensor 100A and the second eccentricity sensor 100B are arranged so that they are spaced apart from each other with a phase difference of 180 degrees, and a dynamic eccentricity occurs in the rotor R, the graphs of the magnetic flux amounts of the first eccentricity sensor 100A and the second eccentricity sensor 100B can be formed in opposite directions and differ from the reference value in magnetic flux amount and cycle.

[0063] Furthermore, at least two or more of the tilting eccentricity, the static eccentricity, and the dynamic eccentricity can occur while superimposed on each other. In this case, the type of eccentricity can be analyzed by comparing each of the eccentricity data with the measured data.

[0064] The eccentricity measurement system of the present disclosure can comprise the eccentricity measurement sensor, which is mounted in the motor and configured to measure the tilting eccentricity, the static eccentricity, and the dynamic eccentricity of the rotor using a change in the magnetic field generated between the rotor and the stator, thereby overcoming a limitation of a prior art method using a reflective laser sensor, reducing costs compared to the prior art reflective laser sensor, detecting the eccentricity factor that most significantly affects noise and vibration of the rotating device, detecting a defect at the initial stage of mass production to prevent the shipment of potentially defective products, and measuring eccentricity caused by abrasion or similar factors after product durability tests or after prolonged operation of the vehicle.to identify a problem in advance and take preventative measures such as repairs.

[0065] Furthermore, with the eccentricity measurement system described above, if applied to autonomous vehicles in the future, it will be possible to monitor the mechanical condition of the rotary device. This system can be applied to an intelligent rotary device system capable of evaluating its condition using a pre-defined defect level index, and detecting the condition of the rotary device in a range imperceptible to humans. Additionally, the eccentricity measurement system can be applied in situations where it is difficult to detect the condition of an individual rotary device due to external vibration or noise. Therefore, the eccentricity measurement system can be used to proactively detect and address problems in the electric motor used in urban air mobility (UAM) aircraft.

[0066] The technical teaching should not be interpreted as being limited to the embodiments of the present disclosure. Naturally, the scope of application is diverse, and various modifications and implementations can be made by those skilled in the field without departing from the subject matter of the present disclosure as claimed in the claims. Accordingly, these improvements and modifications fall within the scope of the present disclosure, provided they are obvious to those skilled in the field. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 6441757

[0005]

Claims

[1] Eccentricity measuring system applied to a motor system comprising a stator and a rotor, and measuring an eccentricity of the rotor, wherein the eccentricity measuring system comprises: an eccentricity measuring sensor adapted to a pole shoe of the stator and designed to measure the presence or absence of rotor eccentricity by measuring a change in the magnetic field generated between the rotor and the stator; a first detection connection which is formed integrally with a connection arrangement of the stator and is designed to transmit detection information from the eccentricity measuring sensor to the outside; a second sensing port having a surface adjacent to an axial distal end face of the stator, wherein the second sensing port is configured to transmit sensing information from the eccentricity measuring sensor to the first sensing port; and a connecting substrate designed to electrically connect the first detection port and the second detection port. [2] Eccentricity measurement system according to claim 1, wherein the first detection port comprises: an integrated housing formed by overmolding with a predetermined electrode pattern, integrally formed with the stator terminal arrangement and made of an insulating material; and an external connection into which the electrode pattern is inserted and an electrode of an external component is inserted, and wherein the integrated housing comprises an arc section formed in an arc shape along a circumferential edge of the stator. [3] Eccentricity measurement system according to claim 2, wherein the second detection port comprises: a flat, plate-like substrate part that is electrically connected to the eccentricity measuring sensor and includes a circuit pattern printed on a surface; and a mounting part formed in a shape corresponding to the substrate part, comprising a predetermined receiving space configured to receive the substrate part, having a partition arranged along an edge of the receiving space, having a surface adjacent to an axial distal end face of the stator, and being made of an insulating material. [4] Eccentricity measuring system according to claim 3, wherein the eccentricity measuring sensor comprises a pin extending towards the second sensing port, and wherein the substrate part comprises a through-hole formed by a surface adjacent to the eccentricity measuring sensor, wherein the through-hole is configured such that the pin is fitted into the through-hole and soldered. [5] Eccentricity measuring system according to claim 3 or 4, wherein the substrate part comprises: a ring section formed in a ring shape along the circumferential edge of the stator; and a sensor connection section that extends in a radial direction from the ring section towards the eccentricity measuring sensor. [6] Eccentricity measuring system according to claim 5, wherein the compound substrate comprises: a first connecting part which is provided at one end and is electrically connected to the first detection terminal; a second connecting part, which is provided at the other end and is electrically connected to the second detection port; and a signal transmission part that is electrically connected to the first connection part and the second connection part and has an embedded wiring circuit therein. [7] Eccentricity measuring system according to claim 6, wherein the first sensing connection comprises a first internal connection which is electrically connected to the electrode pattern and is formed such that it is brought out to the outside of the arc section, wherein the integrated housing comprises a first connector insertion groove projecting from a surface of the ring section, located outside the first internal connection and having an inner surface shape corresponding to an outer surface shape of the first connecting part, and wherein the first connecting part is a connector comprising a groove which is concave in an axial direction, such that the first internal connection is inserted into the groove. [8] Eccentricity measurement system according to claim 6 or 7, wherein the second sensing port comprises a second internal port which is electrically connected to the circuit pattern, wherein the substrate part includes a second connector insertion groove which is formed concavely radially inwards along an outer circumferential surface of the second internal connection, wherein the assembly part is formed such that the partition in an area corresponding to an area where the second connector insertion groove is formed is lower than the partition in an area corresponding to an area where the second connector insertion groove is not formed, and wherein the second connecting part is a connector comprising a groove which is concave in the radial direction, so that the second internal connection is inserted into the groove. [9] Eccentricity measuring system according to any one of claims 3 to 8, wherein the mounting part comprises at least one fixing section extending from an inner surface of the receiving space and configured to fix a position of the substrate part. [10] Eccentricity measuring system according to claim 9, wherein the fixing section comprises a first projecting section comprising a curved surface with a predetermined curvature, and wherein a width of a side of the first projecting section adjacent to the stator and a width of a side of the first projecting section not adjacent to the stator are equal to each other. [11] Eccentricity measuring system according to claim 9 or 10, wherein the fixing section comprises a second projecting section comprising a curved surface with a predetermined curvature, and wherein a width of a side of the second projecting section that does not adjoin the stator is smaller than a width of a side of the second projecting section that adjoins the stator. [12] Eccentricity measuring system according to one of claims 9 to 11, wherein the fixing section comprises: a springback section extending from the inner surface of the receiving space of the mounting part; and a projection extending from a distal end of the rebound section to abut a surface of the substrate part. [13] Eccentricity measuring system according to one of claims 1 to 12, wherein the eccentricity measuring sensor is provided as two or more eccentricity measuring sensors arranged in the stator, and the respective eccentricity measuring sensors are arranged such that they are spaced apart from each other at equal intervals. [14] Eccentricity measuring system according to any one of claims 1 to 13, wherein the eccentricity measuring sensor is provided as two or more eccentricity measuring sensors arranged in the stator and arranged such that they are spaced apart from each other while having a phase difference of 90 degrees.

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