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 data acquisition port configured to transmit data acquisition information from the eccentricity measurement sensor to an external device; and a connecting substrate designed to electrically connect the sensing port and the eccentricity measurement sensor.

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, and to a method for its manufacture. Description of the related prior art

[0002] Reflective laser displacement sensors are widely used for measuring the rotor eccentricity 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 intuitive 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 measuring sensor mounted in a motor and configured to measure both 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 to take preventive action such as repair, as well as to provide a method for its manufacture.

[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 aforementioned objectives, one aspect of the present disclosure provides an eccentricity measurement system that is applied to a motor system comprising a stator and a rotor and measures the eccentricity of the rotor, wherein the eccentricity measurement system comprises: an eccentricity measurement 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 sensing terminal configured to transmit sensing information from the eccentricity measurement sensor to an external device; and a connecting substrate configured to electrically connect the sensing terminal and the eccentricity measurement sensor.

[0009] Furthermore, the sensing terminal can include a terminal housing made of an insulating material and formed by overmolding with an electrode pattern that is electrically connected to the interconnecting substrate, and the terminal housing can include: an annular section formed in a ring shape along a circumferential edge of the stator; an external terminal into which the electrode pattern is inserted and an electrode of an external component is inserted; and an internal terminal that is electrically connected to the interconnecting substrate.

[0010] Furthermore, the connection substrate may comprise: a first connection part provided at one end of the connection substrate and electrically connected to the sensing terminal; a second connection part provided at the other end of the connection substrate and electrically connected to the eccentricity measuring sensor; and a signal transmission part electrically connected to the first connection part and the second connection part, which includes an embedded wiring circuit.

[0011] Furthermore, the eccentricity measuring sensor may include: a sensor housing adapted to and fixed on the stator; and a pin electrically connected to the sensing terminal, the pin being vertically bent and having one end connected to the sensor housing and the other end inserted into and electrically connected to the second connector-type connection part.

[0012] Furthermore, the ring section can be mounted such that it abuts a surface of the stator, with the internal terminal being electrically connected to the electrode pattern and projecting inwards in a radial direction of the ring section, and a surface of the first connecting part can abut the internal terminal and can be in surface contact with the internal terminal and be electrically connected to it.

[0013] Furthermore, the terminal housing may also include a terminal support section that projects inwards in the radial direction of the ring section and has one surface adjacent to the internal terminal and the other surface adjacent to the stator.

[0014] Furthermore, the terminal housing may also include coupling sections that are coupled to a surface of the stator and are configured to fix a position of the stator; the coupling sections may be provided individually on two opposite circumferential sides of a support provided on an outer surface of the stator, and surround and support the two opposite circumferential sides of the support; and a surface of the coupling sections adjacent to the support may include an insertion groove into which the support is inserted.

[0015] Furthermore, the terminal housing may include coil protection sections designed to abut surfaces of stator teeth, extending radially from the ring section and formed in shapes corresponding to spaces between motor coils and the stator.

[0016] Furthermore, the ring section can be manufactured simultaneously with a connection arrangement of the stator, be formed as a single component and be made of an insulating material, the internal connection can be electrically connected to the electrode pattern and be formed in such a way that it is brought out from the inside of the ring section to the outside, and the first connecting part can be a connector that includes a groove into which the internal connection is inserted.

[0017] Furthermore, the connector housing may include a connector insertion section comprising a connector insertion groove that protrudes from a surface of the ring section, is formed outside the internal connection, and is shaped to have an inner surface shape that corresponds to an outer surface shape of the first connecting part.

[0018] 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.

[0019] 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.

[0020] Furthermore, a method for manufacturing the eccentricity measurement system may include: step (a) of inserting an electrode pattern into an injection mold for a terminal housing; step (b) of forming the terminal housing by injection molding; step (c) of mounting a sensor housing to the stator by fitting the pole shoe of the stator into an insertion hole of the eccentricity measurement sensor; step (d) of electrically connecting a first connection part of the connection substrate to the sensing terminal; and step (e) of electrically connecting a second connection part of the connection substrate to the eccentricity measurement sensor.

[0021] Furthermore, the terminal housing in step (b) can be formed by injection molding such that it includes a coupling section that is fixed to abut a surface of the stator, and the method can further include step (f) of mounting the terminal housing onto a surface of the stator following step (b).

[0022] Furthermore, the terminal housing can be formed in one piece and simultaneously with a terminal arrangement of the stator by injection molding in step (b), and the method can further comprise step (g) of providing the terminal housing at a position spaced a predetermined distance from an axial distal end of the stator following step (b). Brief description of the drawings Fig. Figure 1 is an overall perspective view showing a stator to which an eccentricity measurement system according to a first embodiment of the present disclosure is applied. Fig. Figure 2 is a front view showing an eccentricity measuring sensor of the present disclosure. Fig. Figure 3 is an overall perspective view showing an eccentricity measurement system according to the first embodiment of the present disclosure. Fig. Figure 4 is a partial perspective view showing an internal connection according to the first embodiment of the present disclosure. Fig. Figure 5 is a partial perspective view showing the shape of a pin of an eccentricity measuring sensor according to the first embodiment of the present disclosure. Fig. Figure 6 is a partial perspective view showing a coupling relationship between a connection substrate, a detection port and the eccentricity measurement sensor according to the first embodiment of the present disclosure. Fig. Figure 7 is a partial top view showing a recessed groove according to the first embodiment of the present disclosure. Fig. Figure 8 is a partial perspective view showing a coupling section according to the first embodiment of the present disclosure. Fig. 9 and Fig. Figure 10 are partial perspective views showing coil protection sections according to the first embodiment of the present disclosure. Fig. Figure 11 is an overall perspective view showing a stator to which an eccentricity measurement system is applied according to a second embodiment of the present disclosure. Fig. Figure 12 is an overall perspective view showing an eccentricity measurement system according to a second embodiment of the present disclosure. Fig. Figure 13 is a partial perspective view showing an external connection according to a second embodiment of the present disclosure. Fig. Figure 14 is a partial perspective view showing a coupling relationship between a connection substrate, a sensing port and an eccentricity measuring sensor according to the second embodiment of the present disclosure. Fig. Figure 15 is a partial perspective view showing a connector insertion section according to the second embodiment 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. Figure 19 is a flowchart showing a method for manufacturing the eccentricity measurement system of the present disclosure. Fig. Figure 20 is a flowchart showing a method for manufacturing the eccentricity measurement system according to the first embodiment of the present disclosure. Fig. Figure 21 is a flowchart showing a method for manufacturing the eccentricity measurement system according to the second embodiment of the present disclosure. Fig. 22 and Fig. Figure 23 are schematic views showing a positional relationship between a rotor and the eccentricity measuring sensor in the case of tilting eccentricity. Fig. Figure 24 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 25 is a schematic view showing a positional relationship between the rotor and the eccentricity measuring sensor in the case of dynamic eccentricity. Fig. 26 and Fig. Figure 27 are schematic views showing graphs of magnetic flux quantities measured by two eccentricity measuring sensors in the case of a tilting eccentricity. Fig. Figure 28 is a schematic view showing graphs of the magnetic flux quantities measured by the two eccentricity measurement sensors in the case of a static eccentricity. Fig. Figure 29 is a schematic view showing graphs of the magnetic flux quantities measured by the two eccentricity measurement sensors in the case of dynamic eccentricity. Detailed description of the revelation

[0023] The technical spirit 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 a meaning and a concept that corresponds to the technical spirit 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.

[0024] A basic configuration of an eccentricity measurement system 1000 of the present disclosure is described below with reference to Fig. 1 and Fig. 2 described.

[0025] 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 sensors 100, a sensing port 200, and connecting substrates 300. The eccentricity sensors 100 can be fitted to pole shoes S1 of the stator S and measure the presence or absence of eccentricity of the rotor R by generating induced electromotive forces in sensor coils 120 by means of a change in the magnetic field generated between the rotor R and the stator S. More precisely, the eccentricity sensor can be a magnetic flux sensor provided such that one surface of it faces the rotor R, and the eccentricity sensor can measure a change in magnetic flux in a region that includes an upper end R1 and a lower end R2 of the rotor R based on an axial direction.

[0026] Furthermore, the sensing port 200 can transmit sensing information from the eccentricity sensor 100 to an external device (e.g., an external device), and the connection substrate 300 can electrically connect the sensing port 200 and the eccentricity sensor 100. In this case, the connection substrate 300 can be provided between the sensing port 200 and the eccentricity sensor 100. Additionally, the sensing port 200 and an existing connection assembly can be soldered together. Furthermore, the sensing port 200 can be formed in a ring shape along an outer circumferential edge of the stator S. Therefore, motor coils C wound around the sensing port 200 and the stator S may not interfere with each other.

[0027] Since the sensing port 200 is included, measurement information obtained by the eccentricity sensor 100 can be easily transmitted externally. Therefore, an induced electromotive force signal generated by the sensor coils 120 and transmitted externally can be analyzed, and the presence or absence of rotor eccentricity R can be detected. Furthermore, since the connecting substrate 300, a separate component designed to electrically connect the sensing port 200 and the eccentricity sensor 100, is included between them, the sensing port 200, which extends circumferentially, and the eccentricity sensor 100, which extends axially, can be mounted separately and temporarily on the stator S and then connected to the connecting substrate 300.Therefore, ease of assembly can be maximized.

[0028] More precisely, as in Fig. As shown in Figure 2, the eccentricity measuring sensor 100 comprises a sensor housing 110 having an insertion hole 111 that is formed to penetrate the stator pole shoe S1, allowing it 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 stator pole shoe S1 in a 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 stator pole shoe S1, 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 stator pole shoe S1. The eccentricity measuring sensor 100 can be inserted into a motor housing as described above, thus minimizing interference with other components.

[0029] 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 S1 of the stator 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 S1 of the stator facing a side face of the rotor R, and the eccentricity measuring sensor 100 can consistently measure a change in the induced electromotive force by magnetic induction through 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), thus measuring tilting eccentricity, static eccentricity, and dynamic eccentricity. Furthermore, the pins 130 can be coupled to the sensor housing 110, project 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.

[0030] 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 pole shoe S1 of the stator 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 shaped such that the depth of a center, based on the radial direction, is deeper than the depth of an outer circumference, also based on the radial direction. For example, the surface adjacent to the sensor coil 120 can be shaped to be round (“U”-shaped) or V-shaped. Therefore, the sensor coil 120, which is wound around the coil body section 112, can be guided so that it is positioned in the middle of the coil body section 112, i.e. the 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 S1 of the stator, with projecting surfaces adjacent to the pole shoe S1 of the stator. Because of the projecting section 113, the eccentricity measuring sensor 100 can be fixed to a radial distal end of the pole shoe S1 of the stator.

[0031] Furthermore, the eccentricity measuring sensor 100 can be fixed radially at an inner diameter position on the pole shoe S1 of the stator core S. Subsequently, the stator S and the eccentricity measuring sensor 100 can be fixed using an impregnating fluid. 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 S1 of the stator, thus improving the accuracy of the eccentricity measurement.

[0032] The detection port 200 and the connection substrate 300 according to the first embodiment of the present disclosure are described in more detail below with reference to Fig. 3 to 10 described.

[0033] As in Fig. As shown in Figure 3, the sensing terminal 200 can comprise a terminal housing 220 made of an insulating material and formed with an electrode pattern 210, which is electrically connected to the eccentricity measuring sensor 100 and is formed by overmolding. More precisely, the terminal housing 220 can be a plastic injection-molded product. The electrode pattern 210, which is a conductor before injection molding, can be placed in a mold, and the terminal housing 220 can be formed together with the electrode pattern 210. The electrode pattern 210 can be produced by punching a copper plate using a press. Since the terminal housing 220 is included, the electrode pattern 210 can be mounted and fixed on the stator S.

[0034] Furthermore, in the first embodiment of the present disclosure, the terminal housing 220 can comprise an annular section 221 formed in a ring shape along the circumferential edge of the stator S, and the annular section 221 can be mounted such that it abuts a surface that is an axial distal end face of the stator S. In addition, the sensing terminal 200 can comprise an external terminal 222 into which the electrode array 210 is inserted and an electrode of an external component is inserted. The external terminal 222 can be formed such that it extends radially outward from the annular section 221.

[0035] Furthermore, the terminal housing 220 can also include through-holes 226 formed through the annular section 221. At least one of the through-holes 226 can be formed at a position where the annular section 221, internal terminals 224, and the external terminal 222 intersect. The through-hole 226 can be a trace of a stepped section provided in a mold and configured to support a position of the electrode pattern 210. That is, the terminal housing 220 can be produced by injection molding in a state where a stepped section protrudes from the mold to support the position of the electrode pattern 210.The reason the stepped section is formed at the point where the annular section 221 and the internal terminal 224 intersect, or where the annular section 221 and the external terminal 222 intersect, is to more efficiently support the position of the electrode pattern 210, since the electrode pattern 210 is bent at this position. (The electrode pattern 210 extends circumferentially from the annular section 221, and the electrode pattern 210 extends radially from the internal terminal 224 and the external terminal 222.)

[0036] Furthermore, as in Fig. As shown in Figure 4, the terminal housing 220 comprises the internal terminal 224, which is electrically connected to the connection substrate 300. In the first embodiment of the present disclosure, the internal terminal 224 can be electrically connected to the electrode pattern 210, and the terminal housing 220 can further comprise a terminal support section 223 configured to support a position of the internal terminal 224. The terminal support section 223 can project from the annular section 221 toward the eccentricity measuring sensor 100, one surface of the terminal support section 223 can adjoin the internal terminal 224, and the other surface of the terminal support section 223 can adjoin the stator S. Furthermore, as shown in Figure 4, the terminal housing 220 can be electrically connected to the electrode pattern 210, and the terminal housing 220 can be further configured to support a position of the internal terminal 224. Fig. As shown in Figure 5, the pin 130 is provided such that one end of the pin 130 is connected to the sensor housing 110, and the other end of the pin 130 is bent vertically and directed towards the ring section 221.

[0037] In this case, as in Fig. Figure 6 shows that the connection substrate 300, according to the first embodiment of the present disclosure, comprises a first connection part 310, which is arranged at one end of the connection substrate 300 and is electrically connected to the sensing terminal 200, and a second connection part 320, which is arranged at the other end of the connection substrate 300 and is electrically connected to the eccentricity measuring sensor 100. Furthermore, the connection substrate 300 can comprise a signal transmission part 330 with two opposite ends, which are electrically connected to the first connection part 310 and the second connection part 320, and a wiring circuit can be embedded in the signal transmission part 330. The signal transmission part 330 can be an FPCB (flexible printed circuit board).A surface of the first connecting part 310 can adjoin the internal terminal 224 and be in surface contact with it, and be electrically connected to it. Furthermore, the second connecting part 320 can be of the connector type, and the other end of the pin 130 can be inserted into the second connecting part 320 and electrically connected to it.

[0038] As in Fig. As shown in Figure 7, the terminal housing 220 can comprise a plurality of housing recess grooves 225, each having a surface adjacent to the axial distal end face of the stator S and formed concavely from a surface of the terminal housing 220. The housing recess grooves 225 can be formed in the entirety of a surface of the terminal housing 220. Fig. Figure 7 shows the housing recess grooves 225 in a coupling section 227, which is described below. The housing recess grooves 225 can be formed such that a surface of the terminal housing 220 has a grid shape. Because the housing recess groove 225 is included, the overall weight of the sensing terminal 200 can be reduced.

[0039] Furthermore, as in Fig. As shown in Figure 8, the terminal housing 220 further comprises the coupling sections 227, which are coupled to the stator S to fix the position of the stator S. More precisely, the coupling sections 227 can be provided individually on two opposite circumferential sides of a support S3, which is provided on an outer surface of the stator S, and the coupling sections 227 can surround and support the two opposite circumferential sides of the support S3. More precisely, a surface of the coupling sections adjacent to the support S3 can comprise an insertion groove 227a into which the support S3 is inserted. Any one surface of the insertion groove 227a can be adjacent to a surface, i.e., a side face of the support S3 perpendicular to the radial direction of the motor, and another surface of the insertion groove 227a can be adjacent to a surface, i.e., a bottom face of the support S3 perpendicular to an axis of the motor.Since the coupling sections 227, which have the above-mentioned shapes, are included, it is possible to restrict movements of the detection terminal 200 in different directions, thereby increasing the coupling strength between the stator S and the detection terminal 200.

[0040] Furthermore, as in Fig. As shown in Figure 9, the terminal housing 220 comprises coil protection sections 228 having surfaces designed to abut teeth S2 of the stator S, the coil protection sections 228 extending radially from the annular section 221 and formed in shapes corresponding to the spaces between the motor coils C and the stator S. For example, an axial distal end of the coil protection section 228 may be formed in an arc shape. Therefore, as shown in Fig. As shown in Figure 10, the coil protection sections 228 are positioned in the spaces between the motor coils C and the spaces between the motor coils C and the stator S, allowing the motor coils C to be extended along the axis of the stator S by an axial height of the coil protection section 228. Therefore, it is possible to minimize damage to the motor coils C between the motor coils C and the edges of the teeth S2 of the stator when the motor coils C are twisted for wiring.

[0041] The detection port 200 and the connection substrate 300 according to the second embodiment of the present disclosure are described in more detail below with reference to Fig. Described in sections 11 to 15.

[0042] As in Fig. 11 and Fig. As shown in Figure 12, the sensing terminal 200 can comprise the electrode pattern 210, which is electrically connected to the eccentricity measuring sensor 100, and the terminal housing 220, which is formed with the electrode pattern 210 by overmolding. For example, the terminal housing 220 can be a plastic housing. The electrode pattern 210, which is a conductor, can be placed in a mold, and the terminal housing 220 can be formed together with the electrode pattern 210 by injection molding. The electrode pattern 210 can be produced by performing punching operations on a copper plate using a press.

[0043] Furthermore, in the second embodiment of the present disclosure, the terminal housing 220 can comprise the annular section 221, which is formed in a ring shape along the circumferential edge of the stator S, and the electrode pattern 210 can be inserted into the terminal housing 220. The annular section 221 of the terminal housing 220 can be manufactured simultaneously with a terminal arrangement T of the stator S, be formed as a single component, and be made of an insulating material. Therefore, the position of the electrode pattern 210 can be fixed to a configuration of the terminal arrangement T that has been provided in advance. In this case, a center of the annular section 221 can coincide with an axis of rotation of the rotor R, and the annular section 221 can be a circular ring.Since the terminal housing 220 includes the ring section 221 according to the second embodiment of the present disclosure, the terminal housing 220 can be easily coupled to the respective eccentricity measuring sensors 100, even if the two or more eccentricity measuring sensors 100 are coupled in the circumferential direction of the stator S. The terminal housing 220 can easily be formed integrally with the existing connection arrangement T, thereby minimizing interference with the motor coil.

[0044] Furthermore, as in Fig. As shown in Figure 13, the terminal housing 220 includes the external terminal 222, which is connected to the electrode pattern 210 and is configured so that the electrode of the external component is inserted into the external terminal 222. The external terminal 222 can be formed by extending the electrode pattern 210 outwards in the radial direction of the ring section 221, and the injection-molded plastic terminal housing 220 can be formed to surround the external terminal 222. Therefore, a connector or similar component can be easily inserted into the external terminal 222, allowing the sensing terminal 200 and other components to be electrically connected and the sensing information to be easily transmitted externally.

[0045] Furthermore, as in Fig. Figure 14 shows that the connection substrate 300, according to the second embodiment of the present disclosure, comprises the first connection part 310, which is arranged at one end of the connection substrate 300 and is electrically connected to the sensing terminal 200, and the second connection part 320, which is arranged at the other end of the connection substrate 300 and is electrically connected to the eccentricity measuring sensor 100. Furthermore, the connection substrate 300 can comprise the signal transmission part 330 having two opposite ends that are electrically connected to the first connection part 310 and the second connection part 320, and the wiring circuit can be embedded in the signal transmission part 330. The signal transmission part 330 can be an FPCB. Since the signal transmission part 330 is set up as an FPCB, the detection port 200 and the eccentricity measurement sensor 100, which are spaced apart from each other, can be connected more easily.

[0046] Furthermore, the eccentricity measuring sensor 100 can comprise the sensor housing 110, which is adapted to and fixed to the stator S, and the pins 130, which are electrically connected to the sensing terminal 200. The pin 130 can be vertically bent; one end of the pin 130 can be connected to the sensor housing 110, and the other end of the pin 130 can be inserted into and electrically connected to the second connector-type connection part 320. Because the pin 130 is bent, the connector of the second connection part 320 may not need to be bent, and the signal transmission part 330, which is an FPCB, may not need to be excessively bent, thus improving the durability of the connection substrate 300.

[0047] In this case, as in Fig. As shown in Figure 15, the sensing port 200 comprises the internal port 224, which is electrically connected to the electrode pattern 210 and is configured to extend from the interior of the annular section 221 to the outside. More precisely, in the second embodiment of the present disclosure, the internal port 224 can be formed by extending the electrode pattern 210 to the outside of the annular section 221 in the radial direction. The first connecting part 310 can be a connector, and the first connecting part 310 can include a groove into which the internal port 224 is inserted. Furthermore, the connection housing 220 can include a connector insertion section 229 into which the first connecting part 310 is inserted.The connector insertion section 229 can include a connector insertion groove 229a which projects from a surface of the ring section 221, is formed outside the internal terminals 224 and is formed such that it has an inner surface shape corresponding to an outer surface shape of the first connecting part 310.

[0048] Embodiments of an arrangement of the eccentricity measuring sensors 100 of the present disclosure are described in more detail below with reference to Fig. Described in sections 16 to 18.

[0049] 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.

[0050] Furthermore, as in Fig. Figure 18 shows two or more eccentricity measuring sensors 100 arranged in the stator S and 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.

[0051] A method for manufacturing the eccentricity measurement system of the present disclosure is described in more detail below with reference to Fig. Described in sections 19 to 21.

[0052] As in Fig. As shown in Figure 19, the method for manufacturing the eccentricity measuring system of the present disclosure can comprise step (a) of inserting the electrode pattern 210 into an injection mold for the terminal housing 220, step (b) of forming the terminal housing 220 by injection molding, step (c) of mounting the sensor housing 110 on the stator S by fitting the pole shoes of the stator S into the insertion holes 111 of the eccentricity measuring sensors 100, step (d) of electrically connecting the first connection parts 310 of the connection substrates 300 to the sensing terminal 200, and step (e) of electrically connecting the second connection parts 320 of the connection substrates 300 to the eccentricity measuring sensors 100.

[0053] More precisely, in the method for manufacturing the eccentricity measuring system according to the first embodiment of the present disclosure, which is described in Fig. As shown in Figure 20, the terminal housing 220 is formed in step (b) by injection molding such that the terminal housing 220 comprises the coupling sections 227, which are fixed so that they abut a surface of the stator S. Furthermore, the method for manufacturing the eccentricity measuring system according to the first embodiment of the present disclosure can also include a step (f) of mounting the terminal housing 220 onto a surface of the stator S following step (b). In this case, the terminal housing 220 can be mounted onto the stator S by means of the coupling sections 227.

[0054] Furthermore, in the method for manufacturing the eccentricity measuring system according to the second embodiment of the present disclosure, which is described in Fig. As shown in Figure 21, the terminal housing 220 and the terminal assembly T in step (b) are made of the same material and of an insulating material such as plastic. Therefore, it is possible to significantly reduce the number of manufacturing processes and lower manufacturing costs. Furthermore, the method for manufacturing the eccentricity measuring system according to the second embodiment of the present disclosure can include a step of providing the terminal housing 220 at a position spaced a predetermined distance in the axial direction from the axial distal end face of the stator S, following step (b).

[0055] Furthermore, in step (c), the eccentricity measuring sensor 100 can be fixed to the pole shoe of the stator S in the radial direction at the 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.

[0056] Furthermore, in step (d), the sensing port 200 can comprise the internal ports 224, which are electrically connected to the electrode pattern 210. In this case, in step (d) of the method for manufacturing the eccentricity measuring system according to the first embodiment, the internal port 224 can project in the radial direction of the annular section 221, the internal port 224 can be electrically connected to the electrode pattern 210, and the port housing 220 can further comprise the port support section 223, which is configured to support the position of the internal port 224. The port support section 223 can project from the annular section 221 in the direction of the eccentricity measuring sensor 100, one surface of the port support section 223 can be adjacent to the internal port 224, and the other surface of the port support section 223 can be adjacent to the stator S.Furthermore, the pin 130 can be provided such that one end of the pin 130 is connected to the sensor housing 110, and the other end of the pin 130 is bent vertically and directed towards the ring section 221.

[0057] Furthermore, in step (d) of the method for manufacturing the eccentricity measuring system according to the second embodiment, the internal connection 224 can be formed such that it extends from the interior of the ring section 221 to the outside. More precisely, the internal connection 224 can be formed by extending the electrode pattern 210 to the outside of the ring section 221 in the radial direction. The first connecting part 310 can be a connector, and the first connecting part 310 can include the groove into which the internal connection 224 is inserted. Furthermore, the connection housing 220 can include the connector insertion section 229 into which the first connecting part 310 is inserted.The connector insertion section 229 can include the connector insertion groove 229a, which projects from a surface of the ring section 221, is formed outside the internal terminals 224 and is formed to have an inner surface shape corresponding to an outer surface shape of the first connecting part 310.

[0058] Furthermore, in step (e), the eccentricity measuring sensor 100 can comprise the sensor housing 110, which is adapted to and fixed to the stator S, and the pins 130, which are electrically connected to the sensing terminal 200. The pin 130 can be vertically bent, one end of the pin 130 can be connected to the sensor housing 110, and the other end of the pin 130 can be inserted into and electrically connected to the second connector-type connection part 320. Because the pin 130 is bent, the connector of the second connection part 320 may not need to be bent, and the signal transmission part 330, which is an FPCB, may not need to be excessively bent, thus improving the durability of the connection substrate 300.

[0059] 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 22 to 29.

[0060] As in Fig. As shown in Figure 22, 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 amount of magnetic flux on the side near the eccentricity sensor 100 can increase, and the amount of magnetic flux on the side furthest from the eccentricity sensor 100 can decrease. That is, the total amount of magnetic flux can change.

[0061] More precisely, if there is an eccentricity in a left / right direction in Fig. 22 occurs, an aspect is measured in which the magnetic flux quantity increases only at one of the upper ends R1 or the lower ends R2 of the rotor R, and the magnetic flux quantity 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 quantity increases at the upper end R1 of the rotor and the magnetic flux quantity decreases at the lower end R2 of the rotor, the upper end R1 of the rotor is inclined towards the eccentricity measuring sensor 100. Conversely, it can be determined that the lower end R2 of the rotor is inclined towards the eccentricity measuring sensor 100.

[0062] Furthermore, if an eccentricity in an upward / downward direction is present in Fig. 22 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 quantities 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.

[0063] As in Fig. As shown in Figure 23, 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.

[0064] More precisely, if an eccentricity occurs, an aspect can be measured in which the magnetic flux only increases or decreases at one end (R1) or the other (R2) of the rotor, while the magnetic flux at the other end (R1) 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, if the magnetic flux at the lower end (R2) of the rotor is tilted, then the lower end (R2) of the rotor is tilted.

[0065] As in Fig. As shown in Figure 24, 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 magnetic flux quantity can increase or decrease. That is, it can be determined that the rotor R is statically eccentric towards the eccentricity sensor 100 if the magnetic flux quantities 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 magnetic flux quantities at the upper end R1 and at the lower end R2 of the rotor decrease simultaneously in the same way.

[0066] Furthermore, as in Fig. Figure 25 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 changes 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.

[0067] Furthermore, as in Fig. Figure 26 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 amount of magnetic flux on the side near the eccentricity measuring sensor 100 increases, and the amount of magnetic flux on the side furthest from the eccentricity measuring sensor 100 decreases. That is, the total amount of magnetic flux can change.

[0068] 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 quantity may decrease partially compared to a reference magnetic flux quantity 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 quantity 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.

[0069] Furthermore, as in Fig. Figure 27 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 amount of magnetic flux on the side near the eccentricity measuring sensor 100 increases, the amount of magnetic flux on the side furthest from the eccentricity measuring sensor 100 decreases, and the amount of magnetic flux 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 quantity at the first eccentricity measuring sensor 100A may be partially smaller than a reference value, and the magnetic flux quantity at the second eccentricity measuring sensor 100B may be partially larger than the reference value.

[0070] Furthermore, as in Fig. Figure 28 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 measuring sensor 100A and the second eccentricity measuring 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 measuring sensor 100B, the magnetic flux quantity at the first eccentricity measuring sensor 100A may become significantly smaller than a reference value, and the magnetic flux quantity at the second eccentricity measuring sensor 100B may become significantly larger than the reference value.

[0071] Furthermore, as in Fig.Figure 29 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 changes 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 magnetic flux graphs 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 and cycle.

[0072] 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.

[0073] According to the eccentricity measuring system and the method for its manufacture of the present disclosure, as described above, the eccentricity measuring system can comprise the eccentricity measuring sensor, which is mounted in the motor and configured to measure both 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 an eccentricity.which is caused by abrasion or similar factors after product durability tests or after prolonged operation of the vehicle, in order to identify a problem in advance and to take preventative measures such as repairs.

[0074] 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.

[0075] The technical spirit should not be interpreted as being limited to the embodiments of the present disclosure. Naturally, the scope 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 data acquisition port configured to transmit data acquisition information from the eccentricity measurement sensor to an external device; and a connecting substrate designed to electrically connect the sensing port and the eccentricity measurement sensor. [2] Eccentricity measurement system according to claim 1, wherein the sensing port comprises a terminal housing made of an insulating material and formed by overmolding with an electrode pattern that is electrically connected to the connecting substrate, and wherein the terminal housing comprises: a ring section formed in a ring shape along a circumferential edge of the stator; an external connection into which the electrode pattern is inserted and an electrode of an external component is inserted; and an internal connection that is electrically connected to the bonding substrate. [3] Eccentricity measuring system according to claim 2, wherein the compound substrate comprises: a first connecting part that is provided at one end of the connecting substrate and is electrically connected to the detection port; a second connecting part, which is provided at the other end of the connecting substrate and is electrically connected to the eccentricity measuring sensor; 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. [4] Eccentricity measuring system according to claim 3, wherein the eccentricity measuring sensor comprises: a sensor housing that is adapted to and fixed to the stator; and a pen that is electrically connected to the detection port, and wherein the pin is vertically bent and has one end connected to the sensor housing and the other end inserted into the second connecting part and electrically connected to it. [5] Eccentricity measuring system according to claim 4, wherein the ring section is mounted such that it abuts a surface of the stator, wherein the internal connection is electrically connected to the electrode pattern and projects inwards in a radial direction of the ring section, and wherein a surface of the first connecting part adjoins the internal connection and is in surface contact with the internal connection and is electrically connected to it. [6] Eccentricity measuring system according to claim 5, wherein the connection housing further comprises a connection support section which projects inwards in the radial direction of the ring section and has one surface adjacent to the internal connection and the other surface adjacent to the stator. [7] Eccentricity measuring system according to claim 5 or 6, wherein the connection housing further comprises coupling sections which are coupled to a surface of the stator and are configured to fix a position of the stator, wherein the coupling sections are individually provided on two opposite circumferential sides of a bracket which is provided on an outer surface of the stator, and surround and support the two opposite circumferential sides of the bracket, and wherein a surface of the coupling sections adjacent to the holder includes an insertion groove into which the holder is inserted. [8] Eccentricity measuring system according to one of claims 5 to 7, wherein the connection housing comprises coil protection sections which are configured to abut surfaces of teeth of the stator, extend in the radial direction from the ring section and are formed in shapes which correspond to spaces between motor coils and the stator. [9] Eccentricity measuring system according to any one of claims 4 to 8, wherein the ring section is manufactured simultaneously with a connection arrangement of the stator, is formed as a single component and is made of an insulating material, wherein the internal connection is electrically connected to the electrode pattern and is formed such that it leads from an interior of the ring section to the outside, and wherein the first connecting part is a connector which includes a groove into which the internal connection is inserted. [10] Eccentricity measuring system according to claim 9, wherein the connection housing comprises a connector insertion section comprising a connector insertion groove which projects from a surface of the ring section, is formed outside the internal connection and is formed such that it has an inner surface shape corresponding to an outer surface shape of the first connection part. [11] Eccentricity measuring system according to one of claims 1 to 10, wherein the eccentricity measuring sensor is provided as two or more eccentricity measuring sensors arranged in the stator, and the two or more eccentricity measuring sensors are arranged such that they are spaced apart from each other at equal intervals. [12] Eccentricity measuring system according to any one of claims 1 to 11, 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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