Sensing device

Abstract

To provide a torque sensor.SOLUTION: A sensing device has a following configuration. A torque sensor includes a stator and a rotor including magnets. The stator includes a first stator tooth and a second stator tooth and a collector arranged between the first stator tooth and the second stator tooth. The collector includes a first collector and a second collector having a length different from that of the first collector.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sensing device. [Background technology]

[0002] Electronic Power System (EPS) ") is an electronic control device that operates according to the operating conditions. The motor is driven by the RC-2000 (RC-2000) to ensure turning stability and provide quick recovery force. This enables the driver to drive safely.

[0003] The EPS is a sensor that measures the torque of the steering shaft, steering angle, etc. to provide the appropriate torque. The sensor assembly includes a torque sensor that measures the torque applied to the steering shaft. and an index sensor for measuring the angular acceleration of the steering axis. The steering shaft is connected to an input shaft connected to a steering wheel and a power transmission structure on the wheel side. The torsion bar may include an output shaft connected to the input shaft and a torsion bar connecting the input shaft and the output shaft.

[0004] The torque sensor measures the degree of twist of the torsion bar and converts the torque applied to the steering shaft into a torque signal. The index sensor detects the rotation of the output shaft and measures the angular load of the steering shaft. In the sensor assembly, the torque sensor and the index sensor are The sensors may be arranged together and constructed as a unit.

[0005] The torque sensor includes a housing, a rotor, and a stator including stator teeth. and a collector may be included to measure the torque.

[0006] At this time, the torque sensor is of a magnetic type structure, and the collector The rotor may be provided with a structure in which the rotor is disposed outside the stator teeth.

[0007] However, when an external magnetic field is generated, the collector is in the path of the external magnetic field. However, there is a problem that the magnetic flux value of the Hall element (Hall IC) is affected. This causes a change in the output value of the torque sensor, which changes the torsion of the torsion bar. The problem is that the extent of damage cannot be measured accurately.

[0008] In particular, as vehicles become more electronic, the torque sensor is more susceptible to external magnetic fields. Therefore, there is a demand for torque sensors that are not affected by external magnetic fields. This is the reality.

[0009] The sensor is mounted on a board. The board is fixed to the mid-housing. After the board is fixed to the housing, the lower housing covers the board. The structure is complicated, the assembly process is increased, and the sensor support structure is weak. There is a problem.

[0010] The annular collector can also be manufactured by drawing a plate. However, if the collector is produced by the drawing method, several additional processes are required, so However, there are problems in that the manufacturing process becomes complicated and there is a large loss of material. Summary of the Invention [Problem to be solved by the invention]

[0011] The embodiment of the present invention avoids magnetic field interference caused by externally generated magnetic fields when measuring torque. An object thereof is to provide a possible sensing device.

[0012] An embodiment aims to provide a sensing device in which the output value does not change significantly even when the center of the collector and the center of the stator teeth change with respect to the rotation angle. An object thereof is to provide a sensing device in which the output value does not change significantly even when the center of the collector and the center of the stator teeth change with respect to the rotation angle.

[0013] An embodiment aims to provide a sensing device that can reduce the number of parts and firmly support the sensor. An object thereof is to provide a sensing device that can reduce the number of parts and firmly support the sensor.

[0014] An embodiment aims to provide a sensing device that can simplify the manufacturing process of the collector and reduce the loss of collector material. An object thereof is to provide a sensing device that can simplify the manufacturing process of the collector and reduce the loss of collector material.

[0015] The problems to be solved by the embodiments are not limited to the problems mentioned above, and other problems not mentioned here can be clearly understood by those skilled in the art from the following description. The problems to be solved by the embodiments are not limited to the problems mentioned above, and other problems not mentioned here can be clearly understood by those skilled in the art from the following description.

Means for Solving the Problems

[0016] An embodiment can provide a sensing device including a rotor including a stator and a magnet, the stator including a first stator tooth, a second stator tooth, and a collector disposed between the first stator tooth and the second stator tooth, the collector including a first collector and a second collector having a different length from the first collector. An embodiment can provide a sensing device including a rotor including a stator and a magnet, the stator including a first stator tooth, a second stator tooth, and a collector disposed between the first stator tooth and the second stator tooth, the collector including a first collector and a second collector having a different length from the first collector. An embodiment can provide a sensing device including a rotor including a stator and a magnet, the stator including a first stator tooth, a second stator tooth, and a collector disposed between the first stator tooth and the second stator tooth, the collector including a first collector and a second collector having a different length from the first collector. An embodiment can provide a sensing device including a rotor including a stator and a magnet, the stator including a first stator tooth, a second stator tooth, and a collector disposed between the first stator tooth and the second stator tooth, the collector including a first collector and a second collector having a different length from the first collector. An embodiment can provide a sensing device including a rotor including a stator and a magnet, the stator including a first stator tooth, a second stator tooth, and a collector disposed between the first stator tooth and the second stator tooth, the collector including a first collector and a second collector having a different length from the first collector.

[0017] An embodiment can provide a sensing device including a rotor including a stator and a magnet, the stator including a first stator tooth, a second stator tooth, and a collector disposed between the first stator tooth and the second stator tooth, the collector including a first collector and a second collector having a different length from the first collector. An embodiment can provide a sensing device including a rotor including a stator and a magnet, the stator including a first stator tooth, a second stator tooth, and a collector disposed between the first stator tooth and the second stator tooth, the collector including a first collector and a second collector having a different length from the first collector. An embodiment can provide a sensing device including a rotor including a stator and a magnet, the stator including a first stator tooth, a second stator tooth, and a collector disposed between the first stator tooth and the second stator tooth, the collector including a first collector and a second collector having a different length from the first collector. and a second collector, wherein the first collector includes a first region including a plane and a second region including a curved surface, and the second collector includes a third region including a plane and a fourth region including a curved surface, and the first region and the third region can provide a sensing device arranged to correspond to each other.

[0018] Preferably, the first collector includes a first region including a plane and a second region including a curved surface, the second collector includes a third region including a plane and a fourth region including a curved surface, and the first region and the third region can be arranged to correspond to each other.

[0019] Preferably, the first stator tooth may have a larger radius than the second stator tooth.

[0020] Preferably, the first collector has a larger radius than the second collector and can include a sensor arranged between the first collector and the second collector.

[0021] Preferably, the first region and the third region may be parallel to each other.

[0022] Preferably, the plane of the first region includes a first plane and a second plane, and the angle formed by the first plane and the second plane may be between 140 degrees and 160 degrees.

[0023] Preferably, the sensor can be arranged between the plane of the first region and the plane of the third region.

[0024] Preferably, the plane of the first region can be arranged within the angle formed by the two ends and the center of the plane of the third region.

[0025] Preferably, the first stator tooth includes a first body and a first tooth extending from the first body, and the second stator tooth includes a second body and a second tooth extending from the second body. The first tooth of the first stator tooth and the second tooth of the second stator tooth can overlap radially with each other. Preferably, the sensor includes first to fourth sensors, and the first to fourth sensors are arranged between the plane of the first region and the plane of the third region. The plane of the first region includes a first plane and a second plane, the plane of the third region includes a third plane and a fourth plane, and the first and second sensors are arranged between the first plane and the third plane, and the third and fourth sensors can be arranged between the second plane and the fourth plane. The embodiment includes a stator including stator teeth and a rotor including magnets. The stator teeth include a first stator tooth and a second stator tooth that overlap radially with the first stator tooth from the center of the stator. The first stator tooth includes a first body, a plurality of first teeth protruding from the first body, and a plurality of first extensions extending from the first body. The second stator tooth includes a plurality of second teeth. One of the plurality of first teeth is arranged to overlap radially with one of the plurality of second teeth. The first extension can provide a sensing device that overlaps with the magnet axially. Preferably, the first stator tooth includes a first body and a first tooth extending from the first body, and the second stator tooth includes a second body and a second tooth extending from the second body. The first tooth of the first stator tooth and the second tooth of the second stator tooth can overlap radially with each other.

[0026] Preferably, the sensor includes first to fourth sensors, and the first to fourth sensors are arranged between the plane of the first region and the plane of the third region. The plane of the first region includes a first plane and a second plane, the plane of the third region includes a third plane and a fourth plane, and the first and second sensors are arranged between the first plane and the third plane, and the third and fourth sensors can be arranged between the second plane and the fourth plane. Preferably, the first stator tooth includes a first body and a first tooth extending from the first body, and the second stator tooth includes a second body and a second tooth extending from the second body. The first tooth of the first stator tooth and the second tooth of the second stator tooth can overlap radially with each other. Preferably, the sensor includes first to fourth sensors, and the first to fourth sensors are arranged between the plane of the first region and the plane of the third region. The plane of the first region includes a first plane and a second plane, the plane of the third region includes a third plane and a fourth plane, and the first and second sensors are arranged between the first plane and the third plane, and the third and fourth sensors can be arranged between the second plane and the fourth plane. Preferably, the first stator tooth includes a first body and a first tooth extending from the first body, and the second stator tooth includes a second body and a second tooth extending from the second body. The first tooth of the first stator tooth and the second tooth of the second stator tooth can overlap radially with each other. Preferably, the sensor includes first to fourth sensors, and the first to fourth sensors are arranged between the plane of the first region and the plane of the third region. The plane of the first region includes a first plane and a second plane, the plane of the third region includes a third plane and a fourth plane, and the first and second sensors are arranged between the first plane and the third plane, and the third and fourth sensors can be arranged between the second plane and the fourth plane.

[0027] The embodiment includes a stator including stator teeth and a rotor including magnets. The stator teeth include a first stator tooth and a second stator tooth that overlap radially with the first stator tooth from the center of the stator. The first stator tooth includes a first body, a plurality of first teeth protruding from the first body, and a plurality of first extensions extending from the first body. The second stator tooth includes a plurality of second teeth. One of the plurality of first teeth is arranged to overlap radially with one of the plurality of second teeth. The first extension can provide a sensing device that overlaps with the magnet axially. Preferably, the first stator tooth includes a first body and a first tooth extending from the first body, and the second stator tooth includes a second body and a second tooth extending from the second body. The first tooth of the first stator tooth and the second tooth of the second stator tooth can overlap radially with each other. Preferably, the first stator tooth includes a first body and a first tooth extending from the first body, and the second stator tooth includes a second body and a second tooth extending from the second body. The first tooth of the first stator tooth and the second tooth of the second stator tooth can overlap radially with each other. Preferably, the first stator tooth includes a first body and a first tooth extending from the first body, and the second stator tooth includes a second body and a second tooth extending from the second body. The first tooth of the first stator tooth and the second tooth of the second stator tooth can overlap radially with each other. Preferably, the first stator tooth includes a first body and a first tooth extending from the first body, and the second stator tooth includes a second body and a second tooth extending from the second body. The first tooth of the first stator tooth and the second tooth of the second stator tooth can overlap radially with each other. Preferably, the first stator tooth includes a first body and a first tooth extending from the first body, and the second stator tooth includes a second body and a second tooth extending from the second body. The first tooth of the first stator tooth and the second tooth of the second stator tooth can overlap radially with each other. Preferably, the first stator tooth includes a first body and a first tooth extending from the first body, and the second stator tooth includes a second body and a second tooth extending from the second body. The first tooth of the first stator tooth and the second tooth of the second stator tooth can overlap radially with each other. Preferably, the first stator tooth includes a first body and a first tooth extending from the first body, and the second stator tooth includes a second body and a second tooth extending from the second body. The first tooth of the first stator tooth and the second tooth of the second stator tooth can overlap radially with each other. Preferably, the first stator tooth includes a first body and a first tooth extending from the first body, and the second stator tooth includes a second body and a second tooth extending from the second body. The first tooth of the first stator tooth and the second tooth of the second stator tooth can overlap radially with each other. ​

[0028] Preferably, the first stator tooth includes a third tooth, and the third tooth projects from the first extension portion and may be arranged to overlap with the magnet in the radial direction.

[0029] Preferably, the third tooth includes a 3-1 tooth and a 3-2 tooth, and the 3-1 tooth projects from one of the regions of the first extension portion, and the 3-2 tooth projects from another region of the first extension portion, and the 3-1 tooth and the 3-2 tooth may be arranged at a distance.

[0030] Preferably, the 3-1 tooth and the 3-2 tooth may have the same shape.

[0031] Preferably, the third tooth may include a groove arranged in a concave surface on the tip surface.

[0032] Preferably, the third tooth may include a hole penetrating the inner surface and the outer surface of the third tooth.

[0033] Preferably, the 3-1 tooth and the 3-2 tooth may be arranged such that their widths increase towards the first extension portion respectively.

[0034] Preferably, the first stator tooth includes a first region where the first extension portion is arranged between the first tooth and the first tooth in the circumferential direction, and a second region where the first extension portion is not arranged between the first tooth and the first tooth in the circumferential direction, and the first region and the second region may be arranged alternately along the circumferential direction.

[0035] ​​​​​​​ Preferably, the first stator tooth includes a third tooth, and the third tooth protrudes from the first extension portion and can be arranged to overlap with the magnet in the radial direction.

[0036] Preferably, the second stator tooth includes a second-1 stator tooth that includes a part of the plurality of second teeth, and a second- 2 stator tooth that includes the remaining part of the plurality of second teeth, and the second-1 stator tooth and the second-2 stator tooth can be arranged to be separated from each other.

[0037] Preferably, the first stator tooth includes a second extension portion extending from the first extension portion, and the second extension portion can be arranged to overlap with the first body in the radial direction.

[0038] An embodiment includes a stator including a first stator tooth and a second stator tooth, a rotor including a magnet, a collector disposed between the first stator tooth and the second stator tooth, a sensor disposed corresponding to the collector, a connector pin connected to an external power source, a plurality of plates electrically connecting the sensor and the connector pin, and a housing in which the collector and the connector pin are disposed, and each of the plates includes a first surface, a second surface, and a third surface that are different from each other in position, and the first surface, the second surface, and the third surface can each provide a sensing device in contact with the housing.

[0039] An embodiment includes a stator including a first stator tooth and a second stator tooth, a magnet A rotor including a magnet, between the first stator tooth and the second stator tooth A collector disposed therebetween, a sensor disposed corresponding to the collector, and an external power supply A connector pin connected thereto, a plurality of plates electrically connecting the sensor and the connector pin And a housing in which the collector and the connector pin are disposed, wherein the plurality of plates are spaced apart from each other, and the housing includes a partition disposed between adjacent Said plates, and a sensing device can be provided Preferably, the first surface and the second surface are disposed opposite to each other, and the third surface can connect the first

[0040] Surface and the second surface Preferably, the first surfaces respectively disposed on the plurality of plates can be disposed on the same plane

[0041] Preferably, the second surfaces respectively disposed on the plurality of plates can be disposed on the same plane Preferably, the partition can include a first partition disposed along a first direction and a second partition bent from the first partition and disposed along a second direction different from the first direction

[0042] Preferably, the sensor includes a first sensor and a second sensor, and the plate includes A first plate connecting the first sensor and the connector pin, a second plate connecting the second sensor and

[0043] The connector pin, and a third plate connecting the first sensor and the second sensor to connect the connector pin Can include

[0044] Preferably, the sensor includes a first sensor and a second sensor, and the plate includes A first plate connecting the first sensor and the connector pin, a second plate connecting the second sensor and The connector pin, and a third plate connecting the first sensor and the second sensor to connect the connector pin Can include​

[0045] Preferably, the plate includes a first part arranged along a first direction and a second part bent from the first part and arranged along a second direction different from the first direction. Preferably, at least one of the first part and the second part can have a plurality arranged therein. Preferably, the sensor includes a first sensor and a second sensor, and the plate includes a plurality of first holes where the lead wires of the first sensor are connected and arranged along a first column, and a plurality of second holes where the lead wires of the second sensor are connected and arranged along a second column, and the first column and the second column can be arranged to form an angle.

[0046] The embodiment includes a stator and a rotor including a magnet, and the stator includes a first stator tooth, a second stator tooth, and a collector arranged between the first stator tooth and the second stator tooth, and the collector can provide a sensing device in which one side end and the other side end of the collector are in contact and connected, and the one side end and the other side end are arranged to overlap in a first direction. Preferably, the first direction is the width direction of the collector, and includes a protrusion protruding from the other side end, and the one side end can include a groove arranged in a concave surface and arranged on the protrusion.

[0047] Preferably, the protrusion has a width larger than the width of the connecting portion of the protrusion with the other side end.

[0048]

[0049]

[0050]

[0049]

[0050]

[0050] Preferably, the protrusion has a width larger than the width of the connecting portion of the protrusion with the other side end. It can include one region it has.

[0051] Preferably, the collector includes a first region including a plane and a second region including a curved surface, The width of the one side end portion and the width of the other side end portion may be larger than the width of the first region and the width of the second region. It may be.

[0052] Preferably, the one side end portion and the other side end portion can be arranged to overlap in a second direction different from the first direction together with the first direction. It can be arranged to overlap in a second direction different from the first direction.

[0053] Preferably, the first direction is the radial direction of the collector, and the overlapping region of the one side end portion and the other side end portion may be a plane. It can be arranged to overlap in the first direction.

[0054] Preferably, the collector can include a third region and a fourth region having a different thickness from the third region. It can include.

[0055] Preferably, the first direction is the radial direction of the collector, the one side end portion includes a fifth region and a sixth region arranged to overlap in the first direction, and the other side end portion can include a seventh region and an eighth region arranged to overlap in the first direction. It can be arranged to overlap in the first direction. .

[0056] Preferably, the one side end portion and the other side end portion can be alternately arranged in the radial direction.

[0057] Preferably, the one side end portion and the other side end portion can have a locking structure that locks with each other. It can be.

Advantages of the Invention

[0058] The sensing device according to the embodiment having the above configuration has a pair of stator teeth By arranging a collector between them and arranging a sensor between the collectors, magnetic field interference caused by an external magnetic field generated from the outside during torque measurement can be prevented or minimized.

[0059] Also, by arranging the first tooth of the first stator tooth and the second tooth of the second stator tooth spaced apart from each other in the radial direction and overlapping them, and rotating a magnet between the first tooth and the second tooth, the first tooth and the second tooth can be charged with different poles from each other.

[0060] Also, there is an advantage that the magnitude of the collected flux can be increased.

[0061] Also, magnetic field interference caused by an external magnetic field flowing in from the inside of the stator holder can be prevented or minimized.

[0062] Also, magnetic field interference caused by an external magnetic field flowing in from the side surface of the sensing device can be prevented or minimized.

[0063] Also, according to the embodiment, there is an advantage that the output value does not change significantly corresponding to the rotation angle even if the center of the collector is different from the center of the stator tooth.

[0064] Also, according to the embodiment, there is an advantage that scraps are reduced in manufacturing the stator tooth and the assemblability of the stator tooth is improved.

[0065] Also, there is an advantage that the number of parts is reduced by removing the substrate. Also, there is an advantage that the number of parts is reduced by removing a separate housing covering the substrate.

[0066] ​​​​​​ Moreover, the manufacturing process of the collector can be simplified, and the loss of the collector material can be reduced. 。

[0067] The various and beneficial advantages and effects of the embodiments are not limited to the above-described content, and can be more easily understood in the process of describing the specific embodiments of the embodiments.

Brief Description of the Drawings

[0068]

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Embodiments for Carrying Out the Invention

[0069] FIG. 1 is an exploded perspective view showing a sensing device according to an embodiment, and FIG. 2 is a perspective view showing a stator of the sensing device according to the embodiment. In FIGS. 1 and 2, the z direction means the axial direction, and the y direction means the radial direction. And the axial direction and the radial direction are perpendicular to each other. .

[0070] Referring to FIGS. 1 and 2, the sensing device according to the embodiment may include a stator 100, a rotor 200 partially disposed in the stator 100, a sensor 500, a circuit board 600 electrically connected to the sensor 500, and a housing 700 to which the circuit board 600 is coupled. .

[0071] Here, the stator 100 is connected to an output shaft (not shown), and the rotor 200, at least a part of which is rotatably disposed in the stator 100, may be connected to an input shaft (not shown), but is not necessarily limited thereto.

[0072] At this time, the rotor 200 may be rotatably disposed with respect to the stator 100. Hereinafter, the inner side means the direction facing the center C with respect to the radial direction, and the outer side may mean the direction opposite to the inner side.

[0073] FIG. 3 is a cross-sectional view showing a stator of a sensing device according to an embodiment.

[0074] The stator 100 can be connected to an output shaft (not shown) of a steering shaft.

[0075] Referring to FIGS. 1 to 3, the stator 100 includes a stator holder 110, a stator body 120, a first stator tooth 130, and a second stator tooth 140. can be included.

[0076] The stator holder 110 can be connected to an output shaft of an electric steering device. Thereby, the stator holder 110 can rotate in conjunction with the rotation of the output shaft. The stator holder 110 can be formed in a cylindrical shape. And the stator holder 110 can be formed of a metal material, but is not necessarily limited thereto. Of course, other materials can be used for the stator holder 110 considering that the output shaft can be fitted and fixed with a certain strength or more. holder 110 can be formed of a metal material, but is not necessarily limited thereto. Of course, other materials can be used for the stator holder 110 considering that the output shaft can be fitted and fixed with a certain strength or more. holder 110 can be formed of a metal material, but is not necessarily limited thereto. Of course, other materials can be used for the stator holder 110 considering that the output shaft can be fitted and fixed with a certain strength or more. holder 110 can be formed of a metal material, but is not necessarily limited thereto. Of course, other materials can be used for the stator holder 110 considering that the output shaft can be fitted and fixed with a certain strength or more.

[0077] The stator holder 110 can include a groove 111. The groove 111 is formed as a concave surface on the outer peripheral surface of the stator holder 110. The groove 111 is arranged along the outer peripheral surface of the stator holder 110. A separate fixing member can be inserted into the groove 111. holder 110. The groove 111 is arranged along the outer peripheral surface of the stator holder 110. A separate fixing member can be inserted into the groove 111.

[0078] The stator holder 110 can be coupled to the stator body 120.

[0079] The stator body 120 can be arranged at one end of the stator holder 110. The stator body 120 is formed by an insert injection method using a synthetic resin such as resin. It can be coupled to the data holder 110. On the outer peripheral surface of the stator body 120, a main gear 120a can be formed. The main gear 120a transmits the rotational force of the stator 100 to the first gear (10 in FIG. 31) and the second gear (20 in FIG. 31).

[0080] The first stator tooth 130 and the second stator tooth 140 can be arranged radially spaced apart from each other. And the first stator tooth 130 and the second stator tooth 140 can be fixed to the stator body 120. The first stator tooth 130 includes a first body 131, a first tooth 132, and a third tooth 133. The second stator tooth 140 includes a second body 141 and a second tooth 142.

[0081] FIG. 4 is a plan view showing the stator body of the stator, and FIGS. 5 and 6 are cross-sectional views showing the stator body of the stator. FIGS. 4 to 6, the stator body 120 includes an inner portion 121, an outer portion 122, and a partition 123. The inner portion 121 and the outer portion 122 are cylindrical. The outer portion 122 is arranged radially spaced apart from the outside of the inner portion 121. The partition 123 connects the inner portion 121 and the outer portion 122. The inner portion 121, the outer portion 122, and the partition 123 may be integral. The stator holder 110 can be coupled to the inside of the inner portion 121.

[0082] Referring to FIGS. 4 to 6, the stator body 120 includes an inner portion 121, an outer portion 122, and a partition 123. The inner portion 121 and the outer portion 122 are cylindrical. The outer portion 122 is arranged radially spaced apart from the outside of the inner portion 121. The partition 123 connects the inner portion 121 and the outer portion 122. The inner portion 121, the outer portion 122, and the partition 123 may be integral. The stator holder 110 can be coupled to the inside of the inner portion 121. A space S can be formed between the outer portion 122 and the inner portion 121. The partition 123 can be formed in a plate shape. The partition 123 can be arranged between the inner portion 121 and the outer portion 122. A space S can be formed between the outer portion 122 and the inner portion 121. The partition 123 can be formed in a plate shape. The partition 123 can be arranged between the inner portion 121 and the outer portion 122. The inner portion 121, the outer portion 122, and the partition 123 may be integral. The stator holder 110 can be coupled to the inside of the inner portion 121. A space S can be formed between the outer portion 122 and the inner portion 121. The partition 123 can be formed in a plate shape. The partition 123 can be arranged between the inner portion 121 and the outer portion 122. A space S can be formed between the outer portion 122 and the inner portion 121. The partition 123 can be formed in a plate shape. The partition 123 can be arranged between the inner portion 121 and the outer portion 122. A space S can be formed between the outer portion 122 and the inner portion 121. The partition 123 can be formed in a plate shape. The partition 123 can be arranged between the inner portion 121 and the outer portion 122.

[0083] The space S can be divided into a first space S1 and a second space S2 by the partition 123. The first space S A sensor 500 can be disposed in the first space S1, and a magnet 230 can be disposed in the second space S2. The partition plate 123 can be disposed below the virtual horizontal line L1. Here, the virtual horizontal line L1 passes through the center of the outer portion 122 with reference to the axial direction.

[0084] On the other hand, the partition plate 123 can include a first hole 124 and a second hole 125. The first hole 124 and the second hole 125 are for the arrangement of the first stator tooth 130 and the second stator tooth 140.

[0085] A first body 131 and a second body 141 can be disposed in the first space S1. In the second space S2, a first tooth 132 and a second tooth 142 can be disposed.

[0086] A plurality of first holes 124 can be formed at intervals along the circumferential direction. And the first tooth 132 passes through the first hole 124 and is disposed in the second space S2. At this time, the number of the first holes 124 is the same as the number of the first teeth 132. The first hole 1 24 can be disposed adjacent to the inner circumferential surface of the outer portion 122. As shown in FIG. 5, the first hole 124 can be formed in the partition plate 123 so as to touch the inner circumferential surface of the outer portion 122.

[0087] A plurality of second holes 125 can be formed at intervals along the circumferential direction. At this time and with reference to the radial direction, the second holes 125 can be disposed spaced inside the first holes 124. And the second tooth 142 passes through the second hole 125 and is disposed in the second space S2. At this time, the number of the second holes 125 is the number of the second stator teeth 140 of It is the same as the number of the two teeth 142. The second hole 125 can be arranged so as to be adjacent to the outer peripheral surface of the inner portion 121. As shown in FIG. 8, the second hole 125 can be formed in the partition plate 123 so as to be in contact with the outer peripheral surface of the inner portion 121.

[0088] A plurality of third holes 127 can be formed at intervals along the circumferential direction. The third hole 127 can be arranged between the second holes 125 with reference to the circumferential direction. The third tooth 133 is disposed in the second space S2 through the third hole 127. At this time, the number of the third holes 127 may be the same as the number of the third teeth 133 of the first stator teeth 130. The third hole 127 can be arranged so as to be adjacent to the outer peripheral surface of the inner portion 121. The third hole 127 can be formed in the partition plate 123 so as to touch the outer peripheral surface of the inner portion 121.

[0089] The first stator teeth 130 and the second stator teeth 140 can be arranged between the outer peripheral surface of the inner portion 121 and the inner peripheral surface of the outer portion 122 of the stator body 120. Here, the first stator teeth 130 and the second stator teeth 140 can be formed of a metal material due to the charging caused by the rotation of the magnet 230.

[0090] And, the first stator teeth 130 can be fixed to the inner peripheral surface of the outer portion 122 by an adhesive member such as a bond (not shown), and the second stator teeth 140 can be fixed to the outer peripheral surface of the inner portion 121 by an adhesive member such as a bond (not shown), but it is not necessarily limited to this. For example, through a fastening member (not shown) or a caulking method, etc. The first stator tooth 130 and the second stator tooth 140 can each be fixed to the stator body 120.

[0091] A boss 126 is arranged to extend below the partition 123. The side wall of the boss 126 and the outer part 12 2 are separated to form a first slot U1. The first tooth 132 is inserted into the first slot U1 and passes through the first hole 124 to be located in the second space S2. And the side wall of the boss 126 and the inner part 121 are separated to form a second slot U2. The second tooth 142 and the third tooth 133 are inserted into the second slot U2 and respectively pass through the second hole 125 and the third hole 127 to be located in the second space S2.

[0092] The first slot U1 guides the first tooth 132 to the first hole 124 to facilitate the connection during the process of connecting the first stator tooth 130 to the stator body 120.

[0093] The second slot U2 guides the second tooth 142 and the third tooth 133 to the second hole 125 and the third hole 127 respectively to facilitate the connection during the process of connecting the second stator tooth 140 to the stator body 120.

[0094] FIG. 7 is a side view showing the first stator tooth, and FIG. 8 is a side view showing the second stator tooth teeth.

[0095] Referring to FIGS. 2 and 7, the first stator tooth 130 may include a first body 131 and a plurality of first teeth 132 protruding axially and spaced apart from the first body 131.

[0096] Referring to FIGS. 2 and 8, the second stator tooth 140 includes a second body 141 and a plurality of second teeth 142 that protrude axially away from the second body 141. It can be.

[0097] Based on the upper surface 131a of the first body 131, the height H1 of the first body 131 is smaller than the height H2 of the first tooth 132. And, based on the upper surface 141a of the second body 141, the height H3 of the second body 141 is smaller than the height H4 of the second tooth 142. However, the present invention is not limited to this, and the height H2 of the first tooth 132 and the height H4 of the second tooth 142 may be different.

[0098] FIG. 9 is a plan view showing the first stator tooth, the second stator tooth, and the magnet. It is.

[0099] Referring to FIG. 9, the first stator tooth 130 is disposed outside the second stator tooth 140. When viewed from the radial direction (y direction), the first tooth 132 and the second tooth 142 may be arranged to overlap in the radial direction. Such an arrangement of the first tooth 132 and the second tooth 142 has the effect of reducing magnetic flux leakage.

[0100] FIG. 10 is a view showing the first pole and the second pole of the magnet. Referring to FIG. 10, the magnet includes a first pole 230A and a second pole 230B. The first pole 230A and the second pole 230B may be alternately arranged along the circumferential direction of the magnet.

[0101] The first pole 230A and the second pole 230B may each include an N - pole region NA and an S - pole region SA. The first pole 230A and the second pole 230B are such that the N - pole region NA and the S - pole region SA are respectively ​​​​ It may have a multi-layer structure divided into inner and outer sides.

[0102] For the first pole 230A, the N-pole region NA can be arranged relatively on the outer side, and the S-pole region SA can be arranged inside the N-pole region NA. For the second pole 230B, the N-pole region NA can be arranged relatively on the inner side , and the S-pole region SA can be arranged outside the N-pole region NA.

[0103] The N-pole region NA of the first pole 230A and the S-pole region SA of the second pole 230B are arranged adjacent to each other. The S-pole region SA of the first pole 230A and the N-pole region NA of the second pole 230B are arranged adjacent to each other. When the magnet 230 rotates and the first tooth 132 approaches the S-pole region SA and is charged with S-pole

[0104] charge, the second tooth 142 approaches the N-pole region NA and is charged with N-pole. Or when the magnet 230 rotates and the first tooth 132 approaches the N-pole region NA and is charged with N-pole charge, the second tooth 142 approaches the S-pole region SA and is charged with S-pole. Thus the sensor 500 can measure the angle through the magnetic field applied through the first stator tooth 130, the second stator tooth 140 and the collector (800 in FIG. 22). The first tooth 132 and the second tooth 142 of the sensing device according to the embodiment overlap in the radial direction. Both ends of the second tooth 142 can overlap the first tooth 132. For example, when designing the positions and sizes of the first tooth 132 and the second tooth 142,

[0105] the first angle θ1, the second angle (θ2 in FIG. 11) and the third angle (θ3 in FIG. 12) may be the same.

[0106] ​​​​ The first angle θ1 is the angle formed by both ends of the first pole 230A with respect to the center C of the stator. For example, when there are 8 first poles 230A and 8 second poles 230B, the first angle θ 1 may be 22.5°.

[0107] FIG. 11 is a diagram showing the second angle θ2, and FIG. 12 is a diagram showing the third angle θ3. .

[0108] Referring to FIG. 11, the second angle θ2 is the angle formed by both ends P1 of the first tooth 132 with respect to the center C of the stator. The reference point G that defines both ends P1 of the first tooth 132 in the axial direction is as follows. The reference point G corresponds to the point of the first tooth 132 corresponding to the midpoint of the height H1 of the body 231 of the magnet 230 when the first tooth 132 is disposed opposite to the body 231 of the magnet 230. The height H1 of the body 231 of the magnet 230 means the height formed by the upper surface 231a and the lower surface 231b of the magnet 230 with respect to the axial direction. The angle θ4 between the first tooth 132 and the first tooth 132 at the reference point G may be the same as the second angle θ2.

[0109] Referring to FIG. 12, the third angle θ3 is the angle formed by both ends P2 of the second tooth 142 with respect to the center C of the stator. The reference point G that defines both ends P2 of the second tooth 142 in the axial direction is as follows. The reference point G corresponds to the point of the second tooth 142 corresponding to the midpoint of the height H1 of the body 231 of the magnet 230 when the second tooth 142 is disposed opposite to the body 231 of the magnet 230. The angle θ5 between the second tooth 142 and the second tooth 142 at the reference point G may be the same as the third angle θ3. ​​​​​​​​​​​​

[0110] Figure 13 is a graph showing the flux for the first angle θ1, the second angle θ2, and the third angle θ3. x).

[0111] Referring to Figure 13, with the second angle θ2 and the third angle θ3 set to be the same, the magnitude of the flux increases as the second angle θ2 and the third angle θ3 approach the first angle θ1, and it can be confirmed that the magnitude of the flux decreases as the second angle θ2 and the third angle θ3 move away from the first angle θ1. When the sizes and positions of the first tooth 132 and the second tooth 142 are aligned such that the second angle θ2 and the third angle θ3 become the same as the first angle θ1, it can be seen that the magnitude of the flux of the first and second stator teeth 130 and 140 is the largest.

[0112] Referring to Figure 1, the rotor 200 can include a rotor holder 210, a rotor body 22 0, and a magnet 230. The rotor holder 210, the rotor body 220, and the magnet 230 may be integrated.

[0113] The rotor holder 210 can be coupled to the input shaft of the electric steering device. Thereby, the rotor holder 210 can rotate in conjunction with the rotation of the input shaft. The rotor holder 210 can be formed in a cylindrical shape. And the end of the rotor holder 210 can be coupled to the rotor body 220. The rotor holder 210 can be formed of a metal material, but is not necessarily limited thereto. The rotor holder 210 is considered to have a certain strength or more so that the input shaft can be fitted and fixed. Of course, the material of

[0114] The rotor body 220 is disposed on one side of the outer peripheral surface of the rotor holder 210. The ro The rotor body 220 may be an annular member.

[0115] The magnet 230 is coupled to the rotor body 220. The magnet 230 rotates in conjunction with the rotation of the ro tor holder 210.

[0116] FIG. 14 is a perspective view showing the arrangement of the magnets with respect to the first stator tooth and the second stator tooth.

[0117] Referring to FIG. 14, the magnet 230 is disposed between the first tooth 132 and the second tooth 142. And the magnet 2 30 is disposed between the third tooth 133 and the first tooth 132.

[0118] The body 231 of the magnet 230 is disposed opposite to the first tooth 132, the second tooth 142, and the third tooth 133. The protrusion 232 of the magnet 230 is disposed above the first tooth 132, the second tooth 142, and the third tooth 133.

[0119] FIG. 15 is a perspective view showing the first stator tooth. Referring to FIG. 15, the first stator tooth 130 may include a first body 131, a first tooth 132, a third tooth 133, and an extension 134. The first body 131 may be a ring-shaped member. The first teeth 132 may be spaced apart from each other along the circumferential direction and may extend upward from the upper side of the first body 131. The first body 131 and A plurality of first teeth 132 can be integrally formed. The extension part 134 protrudes inward from the first body 13 1. The third tooth 133 is connected to the extension part 134.

[0120] The first tooth 132 and the third tooth 133 can be formed in a shape that is wider at the bottom and narrower at the top. For example, when viewed in the radial direction, the width of the lower part side of each of the first tooth 132 and the third tooth 133 can be larger than the width of the upper part side. The first tooth 132 and the third tooth 13 3 can each be formed in a trapezoidal shape. And, by the first tooth 132 penetrating the first hole 124 and the third tooth 133 penetrating the third hole 127, the upper surface of the first body 131 and the upper surface of the extension part 134 can be brought into contact with the lower surface of the partition plate 123.

[0121] FIG. 16 is a perspective view showing the second stator teeth. Referring to FIG. 16, the second stator teeth 140 can include a second body 141 and second to oth 142. The second teeth 142 can be arranged at intervals along the circumferential direction and can extend upward from the upper part side of the second teeth 142. The second body 141 and the plurality of second teeth 142 can be integrally formed. The second teeth 142 can be formed in a shape that is wider at the bottom and narrower at the top. For example, when viewed in the radial direction, the width of the lower part side of the second teeth 142 can be larger than the width of the upper part side. The second teeth 142 can include a trapezoidal shape.

[0122] The second body 141 can include a protruding part 141a. The protruding part 141a can be an annular member that bends outward and protrudes with respect to the second to oth 142. The protruding part ​141a reduces the air gap between the sensor 500 and the second body 141 to increase the amount of flux applied to the sensor 50 0.

[0123] Figure 17 is a plan view of the first stator tooth. Referring to Figure 17, the shortest distance R1 from the center C of the first stator tooth 130 to the first tooth 132 is longer than the shortest distance R2 from the center C of the first stator tooth 130 to the third tooth 133 . Relatively, the third tooth 133 is closer to the center C of the first stator tooth 130 than the first tooth 132 . This is to guide the external magnetic field flowing in from the inside of the stator holder 110 to the third tooth 133 .

[0124] Figure 18 is a plan view of the first stator tooth and the second stator tooth.

[0125] Referring to Figure 18, the diameter D3 formed by a plurality of third teeth 133 is smaller than the diameter D1 formed by a plurality of first teeth 132 , and the diameter D2 formed by a plurality of second teeth 142 is smaller than the diameter D1 formed by a plurality of first teeth 132. Based on the magnet 230 , the first tooth 132 is arranged outside the magnet 230, and the second tooth 142 and the third tooth 133 are arranged inside the magnet 230.

[0126] Figure 19 is a diagram showing the first tooth, the second tooth, and the third tooth arranged on concentric circles .

[0127] Referring to Figure 19, the first tooth 132, the second tooth 142, and the third tooth 133 can be arranged on concentric circles. The second tooth 142 and the third tooth 133 are virtual first It is arranged on the circumference O1, and the first tooth 132 can be arranged on a virtual second circumference O2 that is different from the virtual first circumference O1. The second tooth 142 and the third tooth 133 can be arranged alternately along the circumferential direction of the stator 100. The first circumference O1 is arranged inside the second circumference O1. This is to disperse the external magnetic field flowing in from the inside of the stator holder 110 omnidirectionally through the second tooth 142 and the third tooth 133. On the other hand, the circumferential width t3 of the lower end of the third tooth 133 may be smaller than the circumferential width t1 of the lower end of the first tooth 132. Also, the circumferential width t3 of the lower end of the third tooth 133 may be smaller than the circumferential width t2 of the lower end of the second tooth 142. Figure 20 is a plan view of the first stator tooth and the second stator tooth showing the flow of the external magnetic field flowing in from the inside of the stator holder, and Figure 21 is a cross-sectional view of the first stator tooth showing the flow of the external magnetic field guided to the third tooth. Referring to Figure 20, the external magnetic fields W1 and W2 flowing in along the stator holder 110 flow into the first stator tooth 130 and the second stator tooth 140 side with reference to the radial direction of the stator 100. Such external magnetic fields W1 and W2 are dispersed and guided to the third tooth 133 together with the second tooth 142. Referring to Figure 21, the external magnetic field W1 flowing into the third tooth 133 is guided to the extension part 134. At this time, the external magnetic field M1 flowing into the third tooth 133 is the magnet 2

[0128] It is arranged on the circumference O1, and the first tooth 132 can be arranged on a virtual second circumference O2 that is different from the virtual first circumference O1. The second tooth 142 and the third tooth 133 can be arranged alternately along the circumferential direction of the stator 100. The first circumference O1 is arranged inside the second circumference O1. This is to disperse the external magnetic field flowing in from the inside of the stator holder 110 omnidirectionally through the second tooth 142 and the third tooth 133. On the other hand, the circumferential width t3 of the lower end of the third tooth 133 may be smaller than the circumferential width t1 of the lower end of the first tooth 132. Also, the circumferential width t3 of the lower end of the third tooth 133 may be smaller than the circumferential width t2 of the lower end of the second tooth 142. Figure 20 is a plan view of the first stator tooth and the second stator tooth showing the flow of the external magnetic field flowing in from the inside of the stator holder, and Figure 21 is a cross-sectional view of the first stator tooth showing the flow of the external magnetic field guided to the third tooth.

[0129] It is arranged on the circumference O1, and the first tooth 132 can be arranged on a virtual second circumference O2 that is different from the virtual first circumference O1. The second tooth 142 and the third tooth 133 can be arranged alternately along the circumferential direction of the stator 100. The first circumference O1 is arranged inside the second circumference O1. This is to disperse the external magnetic field flowing in from the inside of the stator holder 110 omnidirectionally through the second tooth 142 and the third tooth 133. On the other hand, the circumferential width t3 of the lower end of the third tooth 133 may be smaller than the circumferential width t1 of the lower end of the first tooth 132. Also, the circumferential width t3 of the lower end of the third tooth 133 may be smaller than the circumferential width t2 of the lower end of the second tooth 142. Figure 20 is a plan view of the first stator tooth and the second stator tooth showing the flow of the external magnetic field flowing in from the inside of the stator holder, and Figure 21 is a cross-sectional view of the first stator tooth showing the flow of the external magnetic field guided to the third tooth.

[0130] Referring to Figure 20, the external magnetic fields W1 and W2 flowing in along the stator holder 110 flow into the first stator tooth 130 and the second stator tooth 140 side with reference to the radial direction of the stator 100. Such external magnetic fields W1 and W2 are dispersed and guided to the third tooth 133 together with the second tooth 142. Referring to Figure 21, the external magnetic field W1 flowing into the third tooth 133 is guided to the extension part 134. At this time, the external magnetic field M1 flowing into the third tooth 133 is the magnet 2 It is arranged on the circumference O1, and the first tooth 132 can be arranged on a virtual second circumference O2 that is different from the virtual first circumference O1. The second tooth 142 and the third tooth 133 can be arranged alternately along the circumferential direction of the stator 100. The first circumference O1 is arranged inside the second circumference O1. This is to disperse the external magnetic field flowing in from the inside of the stator holder 110 omnidirectionally through the second tooth 142 and the third tooth 133. On the other hand, the circumferential width t3 of the lower end of the third tooth 133 may be smaller than the circumferential width t1 of the lower end of the first tooth 132. Also, the circumferential width t3 of the lower end of the third tooth 133 may be smaller than the circumferential width t2 of the lower end of the second tooth 142.

[0131] Referring to Figure 21, the external magnetic field W1 flowing into the third tooth 133 is guided to the extension part 134. At this time, the external magnetic field M1 flowing into the third tooth 133 is the magnet 2 Referring to Figure 21, the external magnetic field W1 flowing into the third tooth 133 is guided to the extension part 134. At this time, the external magnetic field M1 flowing into the third tooth 133 is the magnet 2 Cancelled by the external magnetic field M2 flowing into the first tooth 132 from 30 and guided to the extension 134. Thus, since the external magnetic field flowing along the stator holder 110 is guided to and cancelled by the first stator tooth 130, there is an advantage that the influence of the external magnetic field on the sensor 500 is greatly reduced.

[0132] Table 1 below compares the torques of the comparative example and the embodiment.

[0133] [Table 1]

[0134] Comparative example 1 is a sensing device without a structure such as the third tooth 133. The embodiment is a sensing device including the third tooth 133. When there is no external magnetic field in the radial direction, the torque should be 0 Nm normally. In comparative example 1 and the embodiment, when an external magnetic field (100 0 A / m) acts in the radial direction, in the case of the comparative example, a torque of 0.41 Nm is measured, indicating that it is greatly affected by the external magnetic field. However, in the case of the embodiment, the measured torque is 0.05 Nm showing that it is hardly affected by the external magnetic field.

[0135] However, the gap between the first and second stator teeth 130, 140 and the sensor 500 in the radial direction determines the amount of flux. When the gap between the first and second stator teeth 130, 140 and the sensor 500 decreases, the flux passing through the sensor 500 increases and the sensitivity of the measured magnetic flux increases. Conversely, when the gap between the first and second stator teeth 130, 140 and the sensor 500 becomes smaller, the flux passing through the sensor 500 decreases and the sensitivity of the magnetic flux measured increases. ​​​​​​The sensitivity of the measured magnetic flux decreases slightly. Thus, the first and second stator teeth 1 30, 140 and the wobble value can increase significantly due to the deviation of the gap between the sensor 500 and the sensor 500.

[0136] FIG. 22 is a perspective view showing the first collector, and FIG. 23 is a perspective view showing the second collector FIG. 24 is a plan view of the first collector, the second collector, and the sensor.

[0137] Referring to FIGS. 22 to 24, the collector 800 may include a first collector 810 and a second collector 820. The first collector 810 and the second collector 820 respectively collect the flux of the stator 100. And the first collector 810 and the second collector 820 may be formed of a metal material. The first collector 810 and the second collector 820 are arranged radially apart coaxially with the center C of the stator. The radius G1 of the first collector 810 may be larger than the radius G2 of the second collector 820. And the length of the first collector 810 may be larger than the length of the second collector 820 Here, the length corresponds to the circumferential length of the first collector 810 and the circumferential length of the second collector 820 when the first collector 810 and the second collector 820 are ring-shaped members respectively respectively. respectively. When the first collector 810 and the second collector 820 are ring-shaped members respectively, the length of the first collector 810 and the circumferential length of the second collector 820 may correspond.

[0138] Radially from the center C of the stator, the second collector 820 may be arranged inside the first collector 810 The first collector 810 and the second collector 820 may be ring-shaped members respectively. The first collector 810 and the second collector 820 are respectively ring-shaped members may be. When the first collector 810 and the second collector 820 are respectively ring-shaped members Since it is a grid-shaped member, the collector 800 can cover the entire regions of the first and second stator teeth 130 and 140 along the circumferential direction. As a result, considering the entire regions of the first and second stator teeth 130 and 140, the sensitivity of the measured magnetic flux due to the deviation of the gap between the first and second stator teeth 130, 140 and the sensor 500 is complementarily stabilized and there is an advantage that the wobble value is improved.

[0139] Such a first collector 810 can include a first region 812, 813 and a second region 811. The first regions 812, 813 are regions including a plane, and the second region 811 is a region including a curved surface. The second collector 820 can include a third region 822, 823 and a fourth region 8 21. The third regions 822, 823 are regions including a plane, and the fourth region 821 is a region including a curved surface. The first regions 812, 813 and the third regions 822, 823 are arranged corresponding to each other. For example, the planes of the first regions 812, 813 can be arranged within an angle Q1 formed by both ends X1, X2 of the plane of the third regions 822, 823 and the center C.

[0140] The first regions 812, 813 and the third regions 822, 823 can be arranged parallel to each other. The first regions 812, 813 can include a first plane 812 and a second plane 813. And the second region 811 can include a third plane 822 and a fourth plane 823.

[0141] The second region 811 and the fourth region 821 can each include a protrusion 814, 824. The protrusions 814, 824 are respectively arranged to extend downward from the lower end of the second region 811 or the lower end of the fourth region 821. The protrusions 814, 824 are in contact with the housing 700 and the collector​ For the connection of -800.

[0142] The sensor 500 detects the change in the magnetic field generated between the stator 100 and the rotor 200. The sensor 500 may be a Hall IC. The sensor 500 detects the magnetization amount of the stator 100 generated by the electrical interaction between the magnet 230 of the rotor 200 and the stator 100. Based on the detected magnetization amount, the sensing device measures the torque.

[0143] The sensor 500 can be arranged between the planes of the first regions 812, 813 and the plane of the second region 811.

[0144] The sensor 500 can include a first sensor 510, a second sensor 520, a third sensor 530, and a fourth sensor 540. The first sensor 510 and the second sensor 520 can be arranged between the first plane 812 and the third plane 822. The third sensor 530 and the fourth sensor 540 can be arranged between the second plane 813 and the fourth plane 823.

[0145] FIG. 25 is a diagram showing the avoidance state of the stator teeth 130, 140 and the external magnetic field.

[0146] Referring to FIG. 25, the first collector 810 serves as a shield against the external magnetic field directed toward the sensor 500 together with the first stator tooth 130.

[0147] The external magnetic field greatly affects the sensing device in the y'-axis direction. Here, the y'-axis direction means the direction facing the sensor 500 among the radial directions perpendicular to the axial direction. y' The axial external magnetic field is induced along the first stator tooth 130 and the second stator tooth 140 as shown in S1 of FIG. 25, so it will flow without affecting the sensor 500. Accordingly, the sensing device according to the embodiment has the advantage that the influence of the external magnetic field on the sensor 500 is small when the y'-axis direction is used as a reference. Moreover, the external magnetic field directed towards the sensor 500 through the first stator tooth 130 can be induced by the first collector 810 as shown in S2 of FIG. 25, so it will flow without affecting the sensor 500 disposed inside the first collector 810. Accordingly, the sensing device according to the embodiment has the advantage that the influence of the external magnetic field on the sensor 500 is small when the y'-axis direction is used as a reference.

[0148]

[0149]

[0150]

Table 2

[0150] The comparative example in Table 2 includes the first stator tooth 130 and the second stator tooth 140 as in the embodiment, but different from the embodiment, it is a sensing device including a semi-circular single collector. The embodiment is a sensing device including a ring-shaped first collector 810 and a second collector 820. When there is no external magnetic field in the radial direction, the torque is normal at ONm. In the comparative example and the embodiment in Table 2, when an external magnetic field (1000 A / m) acts in the axial direction and the y'-axis direction, in the case of the embodiment, it is measured at 0.10 Nm and 0.08 Nm respectively, and it can be seen that it is not affected by the external magnetic field more than the comparative example.

[0151]

[0151] ​​FIG. 26 is a view showing the housing 700 and the collector 800, and FIG. 27 is a view showing the housing 700.

[0152] Referring to FIGS. 26 and 27, the collector 800 is mounted on the housing 700 .

[0153] The housing 700 may include a housing body 710, a first protrusion 760, a second protrusion 720, and a third protrusion 730. The housing body 710 may have a plate shape including an upper surface and a lower surface, and may be in a form with an open upper portion and a lower portion. A hole 701 is disposed at the center of the housing body 710. A stator holder 1 10 is located inside the hole 701. A circuit board 600 may be mounted on the lower surface of the housing body 710. The sensor 500 is mounted on the circuit board 600. The sensor 500 may be disposed above the upper surface of the housing 700 through the hole 740 of the housing 700. A separate cover may be coupled to the lower side of the housing body 710 to cover the circuit board 600. Further, a groove 750 into which the protruding portions 814 and 824 of the collector 800 are inserted may be disposed in the housing 700. The sensor 500 is mounted on the circuit board 600. The sensor 500 may be disposed above the upper surface of the housing 700 through the hole 740 of the housing 700. A separate cover may be coupled to the lower side of the housing body 710 to cover the circuit board 600. Further, a groove 750 into which the protruding portions 814 and 824 of the collector 800 are inserted may be disposed in the housing 700. 710 to cover the circuit board 600. Also, a groove 750 into which the protruding portions 814, 824 of the collector 800 are inserted may be arranged in the housing 700. The second protrusion 720 may protrude axially from the upper surface of the housing 700. The second protrusion 720 may be disposed along the circumference around the hole 701. The second protrusion 720 may be an arcuate member.

[0154] The second protrusion 720 may be disposed between the first collector 810 and the second collector 820 in the radial direction. The outer peripheral surface of the second protrusion 720 may contact the inner peripheral surface of the first collector 810, and the inner peripheral surface of the second protrusion 720 may contact the outer peripheral surface of the second collector 820. The second protrusion 720 may be disposed along the circumference around the hole 701. The second protrusion 720 may be an arcuate member. The second protrusion 720 may be disposed between the first collector 810 and the second collector 820 in the radial direction. The outer peripheral surface of the second protrusion 720 may contact the inner peripheral surface of the first collector 810, and the inner peripheral surface of the second protrusion 720 may contact the outer peripheral surface of the second collector 820. The second protrusion 720 may be disposed between the first collector 810 and the second collector 820 in the radial direction. The outer peripheral surface of the second protrusion 720 may contact the inner peripheral surface of the first collector 810, and the inner peripheral surface of the second protrusion 720 may contact the outer peripheral surface of the second collector 820. The outer peripheral surface of the second protrusion 720 may contact the inner peripheral surface of the first collector 810, and the inner peripheral surface of the second protrusion 720 may contact the outer peripheral surface of the second collector 820.

[0155] The third protrusion 730 may be arranged to protrude axially from the upper surface of the second protrusion 720. And the third protrusion 730 may be arranged between the first collector 810 and the second collector 820 in the radial direction. And there may be a plurality of the third protrusions 730. The third protrusions 730 are fused to fix the collector 800 to the housing 700.

[0156] The first protrusion 760 is a member for maintaining the gap between the first collector 810 and the second collector 820. In particular, it is a member for maintaining the gap between the first collector 810 and the second collector 820 near the sensor 500. Such a first protrusion 760 protrudes axially from the second protrusion 720. The first protrusion 760 may be arranged adjacent to the hole 740. The first protrusion 760 may be a cylindrical member.

[0157] FIG. 28 is a diagram showing the radial distances between the first stator tooth 130, the first collector 810, the second collector 8 20 and the second stator tooth 140.

[0158] Referring to FIG. 28, the sum of the radial distance k2 between the first stator tooth 130 and the second region 811 of the first collector 810 and the radial distance k3 between the second stator tooth 140 and the fourth region 821 of the second collector 820 may be smaller than the radial distance k4 between the first region 812, 813 of the first collector 810 and the third regions 822, 823 of the second collector 820.

[0159] The radial distance k2 between the first stator tooth 130 and the second region 811 of the first collector 810 is between the second region 811 of the first collector 810 and the fourth region of the second collector 820. ​​​​​​It may be smaller than the radial distance k1 of 821. Also, the second stator tooth 140 and The radial distance k3 of the fourth region 821 of the second collector 820 is such that the second region 811 of the first collector 81 0 and the radial distance k1 of the fourth region 821 of the second collector 820 may be smaller.

[0160] In the radial direction, the first collector 810 and the second collector 820 can be arranged between the first tooth 132 and the third tooth 133.

[0161] For example, the radial distance k1 between the second region 811 of the first collector 810 and the fourth region 821 of the second collector 820 may be 10.4 mm to 10.8 mm. Also, the radial distance k2 between the first stator tooth 130 and the second region 811 of the first collector 810 is 0.7 mm to 1.0 mm, and the radial distance k3 between the second stator tooth 140 and the fourth region 821 of the second collector 820 may be 0.55 to 0.85 mm.

[0162] On the other hand, the radial distance k4 between the first regions 812, 813 of the first collector 810 and the third regions 822, 823 of the second collector 820 may be 1.5 mm to 1.9 mm.

[0163] Such radial distances between the first stator tooth 130, the first collector 810, the second collector 8 20 and the second stator tooth 140 are optimal distances for the magnetic field to be transmitted from the first stator tooth 130 or the second stator tooth 140 to the first collector 810 or the second collector 820 and for the transmitted magnetic field to be sensed by the sensor 500. This corresponds to.

[0164] FIG. 29 is a plan view of the collector showing the angle formed by the first plane 812 and the second plane 813 and the angle formed by the third plane 822 and the fourth plane 823.

[0165] Referring to FIG. 29, the fourth angle A1 formed by the first plane 812 and the second plane 813 of the first collector 810 is based on the circumferential width center N1 of the first region 812, 813. The fifth angle A2 formed by the third plane 8 22 and the fourth plane 823 of the second collector 820 may be the same as the fifth angle A2 formed by the third plane 822 and the fourth plane 823 of the second collector 820 based on the circumferential width center N2 of the second region 822, 823. At this time, the fourth angle A 1 or the fifth angle A2 may be 140° to 160°. 1 or the fifth angle A2 may be 140° to 160°. 1 or the fifth angle A2 may be 140° to 160°.

[0166] The radial distance k1 between the second region 811 of the first collector 810 and the fourth region 821 of the second collector 820 is 10.4 mm to 10.8 mm, and the radial distance k2 between the first stator tooth 13 0 and the second region 811 of the first collector 810 is 0.7 mm to 1.0 mm, and the radial distance k3 between the second stator tooth 140 and the fourth region 821 of the second collector 820 is 0.55 to 0.85 mm. When the fourth angle A1 or the fifth angle A2 is 140° to 160°, there is an advantage that no interference occurs between the collector 800 and the first stator tooth 13 0, or between the collector 800 and the second stator tooth 140. 0, or between the collector 800 and the second stator tooth 140. 0, or between the collector 800 and the second stator tooth 140. 0, or between the collector 800 and the second stator tooth 140.

[0167] FIG. 30 is a graph showing the change in the measured torque induced by the external magnetic field corresponding to the rotation angle.

[0168] Referring to FIG. 30, Z0 in FIG. 30 shows the output value of the sensing device corresponding to the rotation angle with the center of the collector 800 aligned with the center of the sensor device. The rotor ​ When ー makes one rotation, the output value appears constantly around 3.3 degrees.

[0169] Z1 in FIG. 30 is a sensing device including a semi-circular collector. When the rotor makes one rotation with the center of the outer collector offset by 0.2 mm, it shows the output value of the sensing device corresponding to the rotation angle. The measurement result shows that the output value changes greatly corresponding to the rotation angle and the wobble value increases by up to 0.33 degrees. When the rotor makes one rotation with the center of the outer collector offset by 0.2 mm, it shows the output value of the sensing device corresponding to the rotation angle. The measurement result shows that the output value changes greatly corresponding to the rotation angle and the wobble value increases by up to 0.33 degrees. When the rotor makes one rotation with the center of the outer collector offset by 0.2 mm, it shows the output value of the sensing device corresponding to the rotation angle. The measurement result shows that the output value changes greatly corresponding to the rotation angle and the wobble value increases by up to 0.33 degrees.

[0170] Z2 in FIG. 30 is a sensing device including the first collector 810 and the second collector 820 according to the embodiment. When the rotor 200 makes one rotation with the center of the first collector 810 arranged outside offset by 0.2 mm from the centers of the stator teeth 130 and 140, it shows the output value of the sensing device corresponding to the rotation angle. The measurement result shows that the output value appears constantly similar to Z0 in FIG. 30 corresponding to the rotation angle. Therefore, despite the center of the first collector 810 being offset, it is confirmed that the wobble value is greatly improved unlike Z1 in FIG. 30. When the rotor 200 makes one rotation with the center of the first collector 810 arranged outside offset by 0.2 mm from the centers of the stator teeth 130 and 140, it shows the output value of the sensing device corresponding to the rotation angle. When the rotor 200 makes one rotation with the center of the first collector 810 arranged outside offset by 0.2 mm from the centers of the stator teeth 130 and 140, it shows the output value of the sensing device corresponding to the rotation angle. When the rotor 200 makes one rotation with the center of the first collector 810 arranged outside offset by 0.2 mm from the centers of the stator teeth 130 and 140, it shows the output value of the sensing device corresponding to the rotation angle. The measurement result shows that the output value appears constantly similar to Z0 in FIG. 30 corresponding to the rotation angle. Therefore, despite the center of the first collector 810 being offset, it is confirmed that the wobble value is greatly improved unlike Z1 in FIG. 30. When the rotor 200 makes one rotation with the center of the first collector 810 arranged outside offset by 0.2 mm from the centers of the stator teeth 130 and 140, it shows the output value of the sensing device corresponding to the rotation angle. The measurement result shows that the output value appears constantly similar to Z0 in FIG. 30 corresponding to the rotation angle. Therefore, despite the center of the first collector 810 being offset, it is confirmed that the wobble value is greatly improved unlike Z1 in FIG. 30. Therefore, despite the center of the first collector 810 being offset, it is confirmed that the wobble value is greatly improved unlike Z1 in FIG. 30.

[0171] FIG. 31 is a diagram showing the first gear and the second gear meshing with the main gear.

[0172] Referring to FIG. 31, as sub-gears meshing with the main gear 120a, it includes the first gear 10 and the second gear 20. The main gear 120a, the first gear 10, the second gear 20, and the sensor 610 are for measuring the angle of the steering axis. The main gear 120a, the first gear 10, the second gear 20, and the sensor 610 are for measuring the angle of the steering axis. The main gear 120a, the first gear 10, the second gear 20, and the sensor 610 are for measuring the angle of the steering axis.

[0173] The main gear 120a, the first gear 10, and the second gear 20 mesh with each other and rotate. The main gear 120a is arranged on the outer peripheral surface of the stator body 120. The first gear 10 and the second gear 20 are arranged on the inner peripheral surface of the stator body 120 and are arranged in the circumferential direction with a certain pitch. The sensor 610 is arranged on the stator body 120 and is used to detect the rotation angle of the first gear 10 and the second gear 20. The main gear 120a is arranged on the outer peripheral surface of the stator body 120. The first gear 10 and the second gear 20 are arranged on the inner peripheral surface of the stator body 120 and are arranged in the circumferential direction with a certain pitch. The sensor 610 is arranged on the stator body 120 and is used to detect the rotation angle of the first gear 10 and the second gear 20. The two gears 20 are rotatably arranged on the housing body 710. The main gear 120a, The first gear 10 and the second gear 20 each have a predetermined gear ratio. For example, When the main gear 120a is at the full angle, when the main gear 120a rotates 4.5 times, The first gear 10 can be designed to rotate 15.6 times, and the second gear 20 can be designed to rotate 14.625 times. Here, the full angle is the angle calculated by accumulating the rotation of the main gear 120a when all the gears return to the state immediately before rotation. It is the angle calculated by accumulating the rotation of the main gear 120a when all the gears return to the state immediately before rotation.

[0174] Magnets can be arranged on the first gear 10 and the second gear 20. The magnets are arranged so as to face the sensor 610. They are arranged so as to face the sensor 610.

[0175] FIG. 32 is a diagram showing the stator of the sensing device according to the second embodiment.

[0176] Referring to FIG. 32, the stator of the sensing device according to the second embodiment can include a stator holder 1110, a stator body 1120, a first stator tooth 1130, and a second stator tooth 1140. Hereinafter, only the configuration different from that of the sensing device according to the first embodiment will be described, and the description of the same configuration will be omitted.

[0177] The first stator tooth 1130 and the second stator tooth 1140 can be arranged radially spaced apart from each other. And the first stator tooth 1130 and the second stator tooth 1140 can be fixed to the stator body 1120. The first stator tooth 1130 includes a first body 1131, a first tooth 1132, a third tooth 1133, and an extension 1130 includes a first body 1131, a first tooth 1132, a third tooth 1133, and an extension It includes part 1134. The second stator tooth 1140 includes a second body 1141 and a second tooth 1142.

[0178] The stator holder 1110 can be coupled to the stator body 1120.

[0179] FIG. 33 is a diagram showing the first stator tooth and the second stator tooth according to the first modification, and FIG. 34 is a diagram showing the first stator tooth shown in FIG. 33. Referring to FIGS. 33 and 34, the first stator tooth 1130 can include a first body 11

[0180] 31, a first tooth 1132, a third tooth 1133, and a first extension 1134. The first body 1131 may be a ring-shaped member. The first teeth 1132 can be arranged spaced apart from each other along the circumferential direction and can extend upward from the upper side of the first body 1131. The first body 1131 and the plurality of first teeth 1132 can be integrally formed. The first extension 1134 projects inward from the first body 1131. The third tooth 11 33 is connected to the first extension 1134. The first teeth 1132 and the third teeth 1133 can be formed in a shape that is wider at the bottom and narrower at the top. For example, when viewed from the radial direction, the width of the lower side of each of the first teeth 1132 and the third teeth 1133 can be larger than the width of the upper side. The first teeth 1132 and the third teeth 11 33 can each be formed in a trapezoidal shape. And by the first tooth 1132 passing through the first hole 1124 and the third tooth 1133 passing through the third hole 1127, the upper surface of the first body 1131 and the upper surface of the first extension 1134 are the lower surface of the partition 1123.

[0181] The first teeth 1132 and the third teeth 1133 can be formed in a shape that is wider at the bottom and narrower at the top. For example, when viewed from the radial direction, the width of the lower side of each of the first teeth 1132 and the third teeth 1133 can be larger than the width of the upper side. The first teeth 1132 and the third teeth 11 33 can each be formed in a trapezoidal shape. And the first tooth 1132 passes through the first hole 1124, and the third tooth 1133 passes through the third hole 1127. In this way, the upper surface of the first body 1131 and the upper surface of the first extension 1134 are the lower surface of the partition 1123. ​​​can be contacted.

[0182] The first extension part 1134 can be arranged to overlap with the magnet 1230 in the axial direction. And the third tooth 1133 can be arranged to overlap with the magnet 1230 in the radial direction.

[0183] The second stator tooth 1140 can include a second body 1141 and a second tooth 1142. The second teeth 1142 can be arranged at intervals along the circumferential direction, and can extend upward from the upper side of the second teeth 1142. The second body 1141 and the plurality of second teeth 1142 can be integrally formed. The second teeth 1142 can be formed in a shape that is wider at the bottom and narrower at the top. For example, when viewed from the radial direction, the width of the lower side of the second tooth 1142 can be larger than the width of the upper side. The second tooth 1142 can include a trapezoidal shape.

[0184] On the other hand, the first stator tooth 1130A according to the first modification example can include a first body 1131A, a first tooth 1132A, a third tooth 1133A, and a first extension part 1134A. And the third tooth 1133A can include a third-1 tooth 1133_1A and a third-2 tooth 1133_2A. The third-1 tooth 1133_1A can project from any one region of the first extension part 1134A. And the third-2 tooth 1133_2A can project from another region of the first extension part 1134A. At this time, the third- 1 tooth 1133_1A and the third-2 tooth 1133_2A can be arranged separately to form a groove 1133_3A. The groove 1133_3A can be formed in the third tooth 1133A. ​​​​​​​The tip surface thereof may be formed as a concave surface. Alternatively, the third-first tooth 1133_1A and the third-second tooth 1133_2A may be spaced apart to form a hole 1133_3A. The hole 1133_3A may be formed to penetrate the inner surface and the outer surface of the tooth. Although the groove 113 3_3A and the hole 1133_3A have been described separately, they may be the same as those indicated in the drawings. And, the third-first tooth 1133_1A and the third-second tooth 1133_2A may have the same shape. The third-first tooth 1133_1A and the said third-second tooth 1133_2A may each have a shape that is wider at the bottom and narrower at the top. For example, the third-first tooth 1133_1A and the said third-second tooth 1133_2A may each have a trapezoidal shape that becomes wider as it goes to the first extension part 1134A. Figure 35 is a diagram showing the first stator tooth and the second stator tooth according to the second modification example, and Figure 36 is a diagram showing the first stator tooth shown in Figure 35. Referring to Figures 35 and 36, the first stator tooth 1130B according to the second modification example

[0185] may include a first body 1131B, a first tooth 1132B, a third tooth 1133B, and a first extension part 1134B. The first stator tooth 1130B may have a first region J

[0186] 1 and a second region J2 alternately arranged along the circumferential direction. The first region J1 is a region where the first extension part 1134B is arranged between the first tooth 1132B and the first tooth 1132B in the circumferential direction. And, the second region J2 is a region where the first extension part 1134B is not arranged between the first tooth 1132B and the first tooth 1132B in the circumferential direction. The first stator tooth 1130B may include a first body 1131B, a first tooth 1132B, a third tooth 1133B, and a first extension part 1134B. The first stator tooth 1130B may have a first region J 1 and a second region J2 alternately arranged along the circumferential direction. The first region J1 is a region where the first extension part 1134B is arranged between the first tooth 1132B and the first tooth 1132B in the circumferential direction. And, the second region J2 is a region where the first extension part 1134B is not arranged between the first tooth 1132B and the first tooth 1132B in the circumferential direction. The first stator tooth 1130B may include a first body 1131B, a first tooth 1132B, a third tooth 1133B, and a first extension part 1134B. The first stator tooth 1130B may have a first region J 1 and a second region J2 alternately arranged along the circumferential direction. The first region J1 is a region where the first extension part 1134B is arranged between the first tooth 1132B and the first tooth 1132B in the circumferential direction. And, the second region J2 is a region where the first extension part 1134B is not arranged between the first tooth 1132B and the first tooth 1132B in the circumferential direction. The first stator The tooth 1130B includes a third tooth 1133B, which is The third tooth 1133B protrudes from the first extension 1134B. 1230.

[0187] The first stator tooth 1130B according to the second modification is the same as the first stator tooth 1130B according to the first modification. The number of first extension parts 1134B and third teeth 1133B is This reduces the amount of material required to manufacture the stator teeth, This has the advantage of improving assembly to the D120.

[0188] FIG. 37 shows a first stator tooth and a second stator tooth according to a third modified example. 38 is a diagram showing the second stator tooth shown in FIG. 37. FIG.

[0189] Referring to FIG. 37 and FIG. 38, a second stator tooth 1140C according to a third modified example For example, the second stator tooth 11 may be a combination of a plurality of teeth. 40C is a stator tooth 2-1 including a part of the plurality of second teeth 1142C. 1140C1 and the remaining second teeth 1142C of the plurality of second teeth 1142C. stator tooth 1140C2, 2-1 stator tooth 1140C1 and 2-2 stator tooth The tator teeth 1140C2 may be spaced apart from each other. The stator tooth 1140C has a relatively simple shape, making it easy to manufacture and reducing the amount of scrap. This reduces the amount of material required to manufacture the stator teeth, and This has the advantage of improving the ease of assembly to the turbobody 1120.

[0190] FIG. 39 shows the first stator tooth and the second stator tooth according to the fourth modification example. FIG. 40 is a view showing the first stator tooth shown in FIG. 39.

[0191] Referring to FIGS. 39 and 40, the first stator tooth 1130D may include a first body 1 131D, a first tooth 1132D, a second tooth 1133D, and a first extension 1134D. Further, the first stator tooth 1130D may include a second extension 1135 extending from the first extension 1134D. The second extension 1135 may be bent at the first extension 1134D and arranged to overlap the first body 1131D in the radial direction. That is, the second extension 1135 is not arranged to face the magnet 1230 in the radial direction. The first stator tooth 1130D according to the third modification example has an advantage that since the area of the entire stator tooth is small, the amount of material for manufacturing the stator tooth can be reduced, and the interference with the magnet 1230 can be greatly reduced. In addition, there is an advantage that the assemblability with respect to the stator body 120 is improved.

[0192] FIG. 41 is a perspective view showing a sensor 2500, a connector pin 2600, and a plate 2900.

[0193] Referring to FIG. 41, the sensor 2500 is welded and connected to the plate 2900. The connector pin 2600 is welded and connected to the plate 2900. The plate 2900 may be made of an electrically conductive material such as copper. There may be a plurality of plates 2900. The plurality of plates 2900 may be arranged on the same plane. And the plurality of platesThe trays 2900 can be arranged separately from each other. The sensor 2500 is coupled to the tray 2900 in an upright form. The connector pins 2600 are also coupled to the tray 2900 in an upright form. The tray 2900 can include a first surface 2901, a second surface 2902, and a third surface 2903. The first surface 2901 and the second surface 2902 are arranged opposite to each other. The third surface 2903 is a surface that connects the first surface 2901 and the second surface 2902. When the tray 2900 is a plate-like member, the first surface 2901 corresponds to one surface of the tray 2900, the second surface 2902 corresponds to the other surface of the tray 2900, and the third surface 2903 corresponds to the side surface of the tray 2900.

[0194]

[0195] Figure 42 is a top view of the sensor 2500, the connector pins 2600, and the tray 2900 shown in Figure 41.

[0196] Referring to Figures 41 and 42, the sensor 2500 can include a first sensor 2510 and a second sensor 2520. The tray 2900 can include a first tray 2900A and a second tray 2900B. The first tray 2900A electrically connects the first sensor 2510 and the connector pins 2600. The second tray 2900B electrically connects the second sensor 2520 and the connector pins 2600. The third tray 2900C connects the first sensor 2510 and the second sensor 2520. And the third tray 2900C electrically connects the first sensor 2510, the second sensor 2520, and the connector pins 2600.

[0197] The first surface 2901 of the first plate 2900A, the first surface 290 1 of the second plate 2900B, and the first surface 2901 of the third plate 2900C can be arranged on the same plane. And , the second surface 2902 of the first plate 2900A, the second surface 290 2 of the second plate 2900B, and the second surface 2902 of the third plate 2900C can be arranged on the same plane.

[0198] FIG. 43 is a side sectional view of the plate 2900 with respect to A-A in FIG. 42, and FIG. 44 is , a side sectional view of the plate 2900 with respect to B-B in FIG. 42.

[0199] Referring to FIGS. 42 to 44, the first surface 2901 and the second surface 2902 of the plate 2900 are in contact with the housing 2700. The third surface 2903 of the plate 2900 also contacts the housing 27 00. The housing 2700 can include a partition wall 2750 disposed between adjacent plates 2900. The partition wall 2750 can maintain the space between adjacent plates 2900 and can insulate adjacent plates 2900 from each other.

[0200] The partition wall 2750 can include a first partition wall 2751 and a second partition wall 2752. The first partition wall 2751 can be arranged along the first direction. The second partition wall 2752 can be bent from the first partition wall 2751 along a second direction different from the first direction and arranged. For example, the second partition wall 2752 can be vertically connected from the first partition wall 2751.

[0201] Such a structure of the plate 2900 and the housing 2700 can be embodied by integrally molding through injection with the sensor 2500, the connector pin 2600, and the plate 2900 combined. In the state where they are combined. ​

[0202] Figure 45 is a perspective view showing the first collector, and Figure 46 is a perspective view showing the second collector. Figure 47 is an enlarged view showing one side end and the other side end of the collector.

[0203] The first collector 3810 and the second collector 3820 may each include first extension parts 3811, 3 821, first bodies 3812, 3822, and second bodies 3813, 3823. The first bodies 3812, 3822 and the second bodies 3813, 3823 are respectively arranged opposite to the first sensor 3500. The second bodies 3813, 3823 may extend from the first bodies 3812, 3822. The first extension parts 3811, 3821 may extend from the first bodies 3812, 3822 and the second bodies 3813, 3823 respectively.

[0204] The first bodies 3812, 3822 and the second bodies 3813, 3823 may each include a flat plane, and the first extension parts 3811, 3821 may include curved surfaces.

[0205] The collector 3800 may be manufactured by a forming method instead of a drawing method. The collector 3800 manufactured by the forming method has one side end 38 01 and the other side end 3802 in contact and connected. Since the collector 3800 is manufactured by the forming method, the number of post - processing steps is greatly reduced, and the material of the collector 3800 can be greatly reduced. In addition, when the collector 3800 is manufactured by the forming method, there is an advantage that mass production is possible, different from the drawing method.

[0206] ​​​​One side end 3801 and the other side end 3802 of the collector 3800 can be arranged to overlap in the first direction or the second direction. Due to the directivity of the first direction and the second direction, the collector 3800 can be implemented in various modified examples. Hereinafter, one side end 3801 and the other side end 3802 of the collector 3800 all correspond to the first collector 3810 and the second collector 3820.

[0207] In the collector 3800 according to the modified example, the first direction may correspond to the width direction of the collector 3800, and the second direction may correspond to the circumferential direction of the collector 3800. One side end 3801 and the other side end 3802 of the collector 3800 can be arranged to form an overlap region O31 along the width direction of the collector 3800. Also, one side end 3801 and the other side end 3802 of the collector 3800 can be arranged to form an overlap region O32 along the circumferential direction of the collector 3800.

[0208] For example, the collector 3800 can include a protrusion 3803 protruding from the other side end 3802. The collector 3800 can include a groove 3804 formed with a concave surface at one side end 3801 where the protrusion 3803 is arranged. The protrusion 3803 protrudes in the circumferential direction of the collector 3800 and is located in the groove 3804. At this time, the protrusion 3803 can include a region having a width larger than the width of the portion where the protrusion 3803 is connected to the other side end 3802. This is to prevent the protrusion 3803 from coming out of the groove 3804 in the circumferential direction of the collector 3800.

[0209] For example, the protrusion 3803 may be a wedge shape in which the width of the portion connected to the other side end 3802 becomes narrow. ​​​​​It can have a shape. With such a structure of the protrusions 3803 and grooves 3804, one side end portion 3801 and the other side end portion 3802 are not separated in the width direction between the one side end portion 3801 and the other side end portion 3802 and are also fixed without being separated in the circumferential direction between the one side end portion 3801 and the other side end portion 3802.

[0210] The one side end portion 3801 and the other side end portion 3802 can be caulked and joined in a separated state such that the protrusions 3803 engage with the grooves 3804 in the radial direction. At this time, the one side end portion 3801 and the other side end portion 3802 can include curved surfaces.

[0211] On the other hand, the collector 3800 can be divided into a first region A31 including a flat surface and a second region A32 including a curved surface. The first region A31 corresponds to the bodies 3812, 3813, 3822, 3823 of the collector 3800, and the second region A32 can correspond to the first extension portions 381 1, 3821 of the collector 3800. The width K31 of the one side end portion 3801 and the width K31 of the other side end portion 3802 may be larger than the width K32 of the first region A31 and the width K32 of the second region A32. Therefore, the one side end portion 3801 and the other side end portion 3802 can protrude from the first region A31 and the second region A32 in the width direction of the collector 3800. Such protruding regions of the one side end portion 3801 and the other side end portion 3802 can increase the coupling force between the housing 3700 and the collector 3800.

[0212] FIG. 48 is a view showing one side end and the other side end of a collector according to another modification.

[0213] Referring to FIG. 48, in the collector 3800 according to another modification, the first direction is the ​​​​It may correspond to the radial direction of the collector 3800. One end portion 3801 and the other end portion 3802 of the collector 3800 may be arranged so as to form an overlap region O33 along the radial direction of the collector 3800. One end portion 3801 and the other end portion 3802 may each be advantageously flat for welding.

[0214] The collector 3800 may be divided into a third region A33 and a fourth region A34 by thickness. The thickness t32 of the fourth region A34 is greater than the thickness t31 of the third region A33. The fourth region A 34 corresponds to the overlap region O33 of one end portion 3801 and the other end portion 3802 in the radial direction. With one end portion 3801 and the other end portion 3802 of the collector 3800 in contact, by welding the one end portion 3801 and the other end portion 3802, the collector 38 00 can be annularly connected.

[0215] FIG. 49 is also a view showing one end portion and the other end portion of a collector according to another modification.

[0216] Referring to FIG. 49, in the collector 3800 according to another modification, the first direction may correspond to the radial direction of the collector 3800. One end portion 3801 of the collector 3800 may include a fifth region A35 and a sixth region A3 6 that are arranged to overlap in the radial direction. And the other end portion 3802 of the collector 3800 may include a seventh region A37 and an eighth region A38 that are arranged to overlap in the radial direction of the collector 3800.

[0217] At this time, the one end portion 3801 and the other end portion 3802 may be alternately arranged in the radial direction. For example, ​​​For example, the fifth region A35, the seventh region A37, the sixth region A36, The eighth region A38 may be arranged in that order.

[0218] Such a collector 3800 has one end 3801 and the other end 3802 folded. This can be realized through a seaming process in which the parts are joined by folding and bending. At this time, one end 3801 and the other end 3802 have a locking structure for being locked to each other. By using such a locking structure, one end 3801 and the other end 3802 are bound together. Thus, the collectors 3800 can be connected in a ring shape.

[0219] FIG. 50 is a diagram showing the direction of the external magnetic field relative to the stator teeth 130 and 140. FIG. 51 shows the avoidance state of the sensor 500 against an external magnetic field having a z-axis direction. This is the diagram.

[0220] Referring to FIG. 50, the external magnetic field is centered in the y'-axis direction, which is perpendicular to the z-axis direction. This has a significant impact on the sensing device.

[0221] Referring to FIG. 52, a sensor 500 of the sensing device according to the embodiment is arranged in the z-axis direction. Therefore, the area of the sensor 500 as viewed from the z-axis is Therefore, the area of the sensor 500 seen from the outside is much smaller than that of the sensor 500 seen from the outside. The device has the advantage that the effect of an external magnetic field on the sensor 500 is small with respect to the z-axis direction. There is a point.

[0222] Referring to FIG. 50 and FIG. 51, the external magnetic field in the y'-axis direction is perpendicular to the z-axis direction. When looking at the state of the sensor 500, it can have a significant effect on the sensor 500. . However, since the external magnetic field in the y'-axis direction is induced along the first stator tooth 130 and the second stator tooth 140, it can flow without affecting the sensor 500. As a result, the sensing device according to the embodiment has an advantage that the influence of the external magnetic field on the sensor 500 is small when the y'-axis direction is used as a reference.

[0223] FIG. 52 is a graph comparing a comparative example and an embodiment with respect to the amount of angle change corresponding to an external magnetic field in the z-axis direction.

[0224] Referring to FIG. 52, in the case of the comparative example in FIG. 52, it is a sensing device having a structure in which the stator teeth 130 and 140 are arranged vertically and the sensor 500 is arranged horizontally. It can be seen that as the external magnetic field in the z-axis direction increases, the amount of angle change increases linearly and the measured angle changes greatly due to the external magnetic field.

[0225] On the other hand, in the case of the embodiment, it can be seen that even when the external magnetic field in the z-axis direction increases, there is almost no angle change and it is not affected by the external magnetic field.

[0226] FIG. 53 is a graph comparing a comparative example and an embodiment with respect to the amount of angle change corresponding to an external magnetic field in the y'-axis direction.

[0227] Referring to FIG. 53, in the case of the comparative example in FIG. 53, it is a sensing device having a structure in which the first and second stator teeth 130 and 1 40 are arranged vertically and the sensor 500 is arranged horizontally. It can be seen that as the external magnetic field in the y'-axis direction increases, the amount of angle change increases linearly and the measured angle changes greatly due to the external magnetic field.

[0228] On the other hand, in the case of the embodiment, it can be seen that even when the external magnetic field in the y'-axis direction increases, there is almost no angular change and it is not affected by the external magnetic field. It is not affected by the external magnetic field.

[0229] The present invention can be used in various apparatuses such as for vehicles or home appliances.

Claims

1. A stator; and A rotor including a magnet, The stator includes a first stator tooth, a second stator tooth, and a collector disposed between the first stator tooth and the second stator tooth, The collector includes a first collector and a second collector having a different length from the first collector, A sensing device, characterized in that:

2. A stator; and A rotor including a magnet, The stator includes a first stator tooth, a second stator, and a collector disposed between the first stator tooth and the second stator tooth, The collector includes a first collector and a second collector, The first collector includes a first region including a plane and a second region including a curved surface, The second collector includes a third region including a plane and a fourth region including a curved surface, The sensing device is characterized in that the first region and the third region are arranged to correspond to each other.

3. The first collector includes a first region including a plane and a second region including a curved surface, The second collector includes a third region including a plane and a fourth region including a curved surface, The sensing device according to claim 1, characterized in that the first region and the third region are arranged to correspond to each other.

4. A stator including stator teeth; and A rotor including a magnet, The stator teeth include a first stator tooth and a second stator tooth that overlaps radially from the center of the first stator tooth and the stator, The first stator tooth includes a first body, a plurality of first teeth protruding from the first body, and a plurality of first extensions extending from the first body, The second stator tooth includes a plurality of second teeth, One of the plurality of first teeth is arranged to overlap one of the plurality of second teeth in the radial direction, The sensing device is characterized in that the first extension is arranged to overlap the magnet in the axial direction.

5. The first stator tooth includes a third tooth, The sensing device according to claim 4, characterized in that the third tooth protrudes from the first extension and is arranged to overlap the magnet in the radial direction.

6. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ A stator including a first stator tooth and a second stator tooth; A rotor including a magnet; A collector disposed between the first stator tooth and the second stator tooth; A sensor disposed corresponding to the collector; A connector pin connected to an external power source; A plurality of plates electrically connecting the sensor and the connector pin; Including a housing in which the collector and the connector pin are disposed, Each of the plates includes a first surface, a second surface, and a third surface that are different from each other in position, The first surface, the second surface, and the third surface are each in contact with the housing, A sensing device, characterized thereby.

7. A stator including a first stator tooth and a second tooth tooth; A rotor including a magnet; A collector disposed between the first stator tooth and the second stator tooth; A sensor disposed corresponding to the collector; A connector pin connected to an external power source; A plurality of plates electrically connecting the sensor and the connector pin; Including a housing in which the collector and the connector pin are disposed, The plurality of plates are spaced apart from each other, The housing includes a partition wall disposed between adjacent ones of the plates, characterized thereby A sensing device.

8. The first surface and the second surface are disposed opposite to each other, The third surface connects the first surface and the second surface, characterized by the sensing device according to claim 6 Thereof.

9. A stator; Including a rotor including a magnet, The stator includes a first stator tooth, a second stator tooth, and a collector disposed between the first stator tooth and the second stator tooth, One side end portion and the other side end portion of the collector are in contact and connected, but The one side end portion and the other side end portion are disposed to overlap in a first direction, characterized Thereby, a sensing device.

10. The first direction is the width direction of the collector, Including a protrusion protruding from the other side end portion, The one side end portion includes a groove formed in a concave surface and disposed on the protrusion, characterized by the sensing device according to claim 9 Thereof. ​

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