Motor manufacturing method and motor manufacturing system

Abstract

The present disclosure relates to a motor manufacturing method and a motor manufacturing system, in which noise and current fluctuations caused by mechanical friction between a brush and a commutator have been reduced. In detail, the motor manufacturing method of the present disclosure includes the following steps: assembling a shaft, an armature fixed on the shaft to be rotatably arranged, a commutator fixed on the shaft to rotate with the armature, and a brush contacting a portion of the surface of the commutator; applying a voltage to the brush and rotating the armature and the commutator together by the rotation of the shaft to age the surface of the commutator; and connecting a housing including a magnetizing magnet to the assembled shaft, armature, commutator, and brush in a magnetizing device.

Description

Technical Field

[0001] The present disclosure relates to a motor manufacturing method and a motor manufacturing system. Background Art

[0002] In a motor with a brush, the brush is pressed in the direction of the commutator by a biasing device such as a spring. In addition, when the commutator rotates, the brush slides and contacts the surface of the commutator.

[0003] In the initial state when the brush is assembled to contact the commutator, the contact state between the brush and the commutator is unstable, so noise is generated due to mechanical friction between the commutator and the brush. In addition, current fluctuations are generated due to assembly tolerances and surface roughness between the commutator and the brush, resulting in noise. Summary of the invention

[0004] Technical issues

[0005] Under such background, an object of the present disclosure is to provide a motor manufacturing method and a motor manufacturing system for suppressing noise or vibration generated between a commutator and a brush by more effectively stabilizing a contact state between the brush and the commutator.

[0006] Technical Solution

[0007] In order to solve the above problems, in one aspect, the present disclosure provides a motor manufacturing method, which includes the following steps: assembling a shaft, an armature fixed to the shaft and rotatably arranged, a commutator fixed to the shaft and rotating with the armature, and a brush contacting a portion of the surface of the commutator; aging the contact surface of the brush and the commutator by applying a voltage to the brush and rotating the armature and the commutator together by rotating the shaft; and connecting a housing including a magnetizing magnet magnetized in a magnetizing device to the assembled shaft, armature, commutator and brush.

[0008] On the other hand, the present disclosure provides a motor manufacturing method, which includes the steps of: assembling a shaft, a commutator fixed to the shaft and rotatably arranged, and a brush contacting a portion of a surface of the commutator; aging the contact surface of the brush and the commutator by applying a voltage to the brush and rotating the commutator together by rotating the shaft; and connecting a housing including a magnetizing magnet magnetized in a magnetizing device to the assembled shaft, commutator, and brush.

[0009] On the other hand, the present disclosure provides a motor manufacturing system, which includes: a voltage applicator for applying voltage to the brush after assembling a shaft, an armature fixed to the shaft and rotatably arranged, a commutator fixed to the shaft and rotating with the armature, and a brush in contact with a portion of the surface of the commutator; a shaft rotating device that rotates the shaft to age the contact surfaces of the brush and the commutator by rotating the armature and the commutator; and a motor assembling device that connects a housing including a magnetized magnet magnetized in a magnetizing device to the assembled shaft, armature, commutator and brush.

[0010] On the other hand, the present disclosure provides a motor manufacturing system, which includes: a voltage applicator for applying voltage to the brush after assembling a shaft, a commutator fixed to the shaft and rotatably arranged, and a brush in contact with a portion of the surface of the commutator; a shaft rotating device for rotating the shaft to age the surface of the commutator by rotating the commutator; and a motor assembling device for connecting a housing including a magnetized magnet magnetized in a magnetizing device to the assembled shaft, armature, commutator and brush.

[0011] Beneficial effects

[0012] Embodiments of the present disclosure provide the effect of maximizing the aging effect and shortening the aging process time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a diagram for explaining an example of a conventional motor manufacturing method.

[0014] Figure 2 is a diagram for explaining another example of a conventional motor manufacturing method.

[0015] Figure 3 is a diagram for explaining another example of a conventional motor manufacturing method.

[0016] Figure 4 is a flowchart illustrating a motor manufacturing method according to an embodiment of the present disclosure.

[0017] Figure 5 1 is a diagram for explaining a method of manufacturing a motor using a rotating body including an armature in a state where a shaft rotating motor and a power source are connected to a shaft and a brush, respectively, according to an embodiment of the present disclosure.

[0018] Figure 6 2 is a diagram for explaining a process of forming a carbon layer on the surface of a commutator in a motor manufacturing method according to an embodiment of the present disclosure.

[0019] Figure 7 1 is a diagram for explaining a method of manufacturing a motor using a rotating body not including an armature in a state where a shaft rotating motor and a power source are connected to a shaft and a brush, respectively, according to an embodiment of the present disclosure.

[0020] Figure 8 is a diagram showing a configuration of a motor manufacturing system according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] In the following description of examples or embodiments of the present disclosure, reference will be made to the accompanying drawings, in which specific examples or embodiments that can be implemented are shown by way of illustration, and wherein the same reference numerals and symbols may be used to indicate the same or similar parts even when the same reference numerals and symbols are shown in different drawings from each other. In addition, in the following description of examples or embodiments of the present disclosure, when it is determined that a detailed description of the well-known functions and components incorporated herein may make the subject matter in some embodiments of the present disclosure unclear, the description will be omitted. Terms such as "including", "having", "containing", "consisting of", "consisting of", and "formed of" used herein are generally intended to allow the addition of other components unless these terms are used together with the term "only". As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise.

[0022] Terms such as "first", "second", "A", "B", "(A)" or "(B)" may be used herein to describe elements of the present disclosure. Each of these terms is not used to define the nature, order, sequence or quantity of an element, but is merely used to distinguish the corresponding element from other elements.

[0023] When it is mentioned that a first element is “connected or coupled to”, “contacts or overlaps”, etc. a second element, it should be interpreted that not only the first element may be “directly connected or coupled to” or “directly contact or overlaps” the second element, but also a third element may be “inserted” between the first and second elements, or the first and second elements may be “connected or coupled to”, “contacts or overlaps”, etc. each other via a fourth element. Here, the second element may be included in at least one of the two or more elements that are “connected or coupled to”, “contacts or overlaps”, etc. each other.

[0024] When time relative terms such as "after", "subsequently", "next", "before", etc. are used to describe a process or operation of an element or configuration, or a flow or step in an operation, process, or manufacturing method, these terms may be used to describe a non-sequential or non-sequential process or operation unless the terms "directly" or "immediately" are used together.

[0025] In addition, when referring to any dimension, relative dimension, etc., it should be considered that the numerical value or corresponding information (e.g., level, etc.) of the element or feature includes tolerance or error range that may be caused by various factors (e.g., process factors, internal or external impact, noise, etc.), even when no relevant description is specified.

[0026] In a motor with a brush, the brush is pressed in the direction of the commutator by a biasing device such as a spring. In addition, when the commutator rotates, the brush slides to contact the surface of the commutator. In the initial state where the brush is assembled to contact the commutator, the contact state between the brush and the commutator is unstable, so noise is generated due to mechanical friction between the commutator and the brush. In addition, current fluctuations are generated due to assembly tolerances and surface roughness between the commutator and the brush, resulting in noise.

[0027] In order to improve this noise of the motor, a process of aging the motor during the manufacturing process is required. Figures 1 to 3 is a diagram for explaining an example of a conventional motor manufacturing method, showing a structure that can be applied when aging a motor.

[0028] First, in Figures 1 to 3 In the embodiment, the motor includes a shaft 8, an armature 6 and a commutator 2 fixed to the shaft 8, a brush 1, a spring 3 for pressing the brush 1 in the direction of the commutator 2 so that the brush 1 contacts the commutator 2, and a housing 4 having a magnet 5 attached inside and connected to the shaft 8 through a bearing 7. According to the conventional motor aging method, Figures 1 to 3 The motor is aged in the state shown. In this specification, the shaft 8 and a component that is fixed to the shaft 8 and rotates together according to the rotation of the shaft 8 are referred to as a rotating body.

[0029] Specifically, in Figure 1 In the embodiment, the motor is in a state where the housing with magnetized magnets is assembled to the rotating body, and the brushes of the motor 100 are connected to the power source 110. The motor rotates under no load, and due to the low current, the current cannot reach the temperature at which a carbon layer is formed on the brushes. Figure 6 In the method, aging by mechanical friction alone is possible. Figure 6 In the aging method shown, the motor is required to rotate for 30 minutes or more, and the aging effect is not large.

[0030] exist Figure 2In the embodiment, the motor 200 is in a state where a housing having a magnetized magnet is assembled to a rotating body, and in order to apply a load to the motor 200, a servomotor or a powder brake (shaft rotating motor) 210 is connected to the shaft of the motor 200, and a controller 211 and a power source 212 for controlling the servomotor or the powder brake are connected in series. In the case of using the servomotor or the powder brake 210, if the rotation speed of the motor is increased to perform aging of the motor at a high speed, the current value applied to the brush and the commutator according to the voltage equation of the motor decreases inversely proportional to the speed due to the induced electromotive force (back electromotive force) of the magnet, making it difficult to form a carbon layer.

[0031] In order to form a carbon layer between the brush 1 and the commutator 2 due to mechanical wear of the brush 1 and the commutator 2 by a motor including the magnet 5 in a non-magnetized state to suppress the induced electromotive force of the magnet, there may be a method of applying magnetizing power to the outside of the housing 4 to magnetize the magnet 5 of the motor after mechanical wear and carbon layer formation, such as Figure 3 However, if the magnet 5 of the motor is magnetized in the fully assembled state of the motor, the possibility of incomplete magnetization increases, and performance degradation and electrical noise may increase. In addition, the bearings 7a and 7b attached to the rotating body may be damaged by strong impact during the magnetization process, thereby causing noise.

[0032] In order to solve this problem, the present disclosure provides a motor manufacturing method and a motor manufacturing system, wherein an armature and a commutator fixed to a shaft are rotated or the commutator is rotated in a state where no magnetized magnet is provided, and a voltage is applied to a brush so that a current flows through the commutator, and a carbon layer is formed on the surface of the commutator while the surface of the commutator is aged. According to the present disclosure, since the surface aging and carbon layer formation of the commutator are performed in a state where the magnetized magnet is not connected, the aging effect can be maximized, and since the back electromotive force of the magnet is not generated, the aging process time can be shortened by high speed and high current.

[0033] Figure 4 is a flow chart showing a motor manufacturing method according to an embodiment of the present disclosure. Figure 5 It is a diagram for explaining a manufacturing method of a motor 500 using a rotating body including an armature in a state where a shaft rotating motor 510 and a power source 520 are respectively connected to a shaft and a brush according to an embodiment of the present disclosure. This embodiment will describe a method of aging the surface of a commutator when an armature is included. In the present disclosure, a shaft rotating motor refers to a motor that rotates the shaft of an aging motor. In the present disclosure, in the aging motor, the shaft rotated by the shaft rotating motor and components (such as a stator and a commutator) fixed to the shaft and rotating with the shaft are integrally represented as a rotating body.

[0034] Reference Figure 4, the motor manufacturing method of the present disclosure may include: assembling a shaft, an armature fixed to the shaft and rotatably disposed, a commutator fixed to the shaft and rotating with the armature, and a brush contacting a portion of a surface of the commutator (S110); aging a contact surface of the brush and the commutator by applying a voltage to the brush and rotating the armature and the commutator together by rotation of the shaft (S120); and connecting a housing including a magnetizing magnet magnetized in a magnetizing device to the assembled shaft, armature, commutator, and brush (S130).

[0035] According to the present disclosure, first, a shaft, an armature fixed to the shaft and rotatably arranged, a commutator fixed to the shaft and rotating with the armature, and a brush in contact with a portion of the surface of the commutator may be assembled. In this step, components such as the shaft, the armature, the commutator, the brush, and a spring for pressing the brush in the direction of the commutator are assembled in addition to a housing including a magnet inside. That is, the aged motor 200 is not in a state of being fully assembled with the magnet and the housing, but is in a state of not including a magnetized magnet and a housing for accommodating the motor.

[0036] In a basic assembly state formed by assembling the shaft, the armature, the commutator, and the brush, the power supply 220 applies a voltage to the brush. In addition, the shaft rotating motor 210 rotates the shaft. By the rotation of the shaft, the armature and the commutator of the motor 200 fixed to the shaft also rotate, and therefore, the contact surface between the commutator and the brush deteriorates.

[0037] In one embodiment, in the step of aging the contact surface of the brush and the commutator by applying voltage to the brush and rotating the armature and the commutator together by rotation of the shaft, a carbon layer is formed on the surface of the commutator by applying current to the commutator by the voltage applied to the brush.

[0038] Figure 6 2 is a diagram for explaining a process of forming a carbon layer on the surface of a commutator in a motor manufacturing method according to an embodiment of the present disclosure.

[0039] In a basic assembled state formed by assembling the shaft, armature, commutator, and brush, voltage is applied to the brush by power, and the rotating body rotates the motor by the shaft rotation. In this case, when brush 1 becomes negative (-) and commutator 2 becomes positive (+), a minute arc discharge phenomenon occurs in the minute gap therebetween, and electrons from brush 1 move from the negative (-) side to the positive (+) side toward commutator 2. If the electrons emitted from brush 1 collide with the surface of commutator 2, copper, which is the material of commutator 2, may evaporate. The evaporated copper atoms collide with the moving electrons and emit electrons to become Cu2 +If the positive ions collide with the surface of the brush 1 as the negative electrode, carbon atoms are emitted and a carbon layer 30 is formed on the surface of the commutator 2. In addition, at this time, the commutator 2 is heated by generating heat by the current, so that the carbon emitted from the brush 1 can be attached to the surface of the commutator 2 relatively easily.

[0040] Furthermore, if the brush 1 is positive (+) and the commutator 2 is negative (-), electrons move from the commutator 2 toward the brush 1. Carbon particles on the surface of the brush 1 are separated by the collision of the electrons and attached to the surface of the commutator 2. Therefore, if a voltage is applied to the brush 1 and the commutator 2 rotates, an almost uniform carbon layer 30 can be formed on the surface of the commutator 2.

[0041] In one embodiment, the voltage applied to the brush may be set to a voltage greater than or equal to a voltage at which exothermic dissolution begins by applying a current to the commutator by the voltage applied to the brush. A current is applied to the brush and the commutator by the voltage applied to the brush, and the temperature rises. Therefore, by exothermic dissolution, a carbon layer may be laminated on the contact surface of the brush and the commutator.

[0042] In one embodiment, the shaft rotating motor can rotate the shaft at a constant speed. That is, rotating the armature and the commutator together through the rotation of the shaft can mean rotating the shaft, the armature and the commutator at a constant speed.

[0043] In another embodiment, the shaft rotating motor can rotate the shaft at a variable speed. That is, rotating the armature and commutator together through the rotation of the shaft can mean rotating the shaft, armature and commutator at a speed that varies with time.

[0044] Since the motor manufactured by the motor manufacturing method of the present disclosure applies voltage to the brushes and rotates the rotating body in a state where the magnetized magnets are not connected, an induced electromotive force generated in the winding by the magnets is not generated.

[0045] Specifically, the voltage equation of the motor is as follows.

[0046] [Equation 1]

[0047]

[0048] Here, V is the applied voltage, R is the resistance of the winding wound on the armature, L is the inductance of the winding, e is the induced electromotive force (back electromotive force) generated in the winding by the magnet, and i is the current flowing through the brushes, commutator, and winding.

[0049] Here, the induced electromotive force generated by the magnet in the winding is defined by the following Equation 2.

[0050] [Equation 2]

[0051] e=Ke·w

[0052] Here, Ke is the induced electromotive force constant and w is the speed of the motor.

[0053] In the traditional motor aging method, the shaft speed needs to be increased to accelerate wear. In this case, the induced electromotive force generated by the magnet in the winding increases as the motor speed increases. When the speed increases, the induced electromotive force increases, so the current flowing through the brush, commutator and winding becomes smaller, which is not conducive to the formation of the carbon layer.

[0054] Meanwhile, in the motor manufacturing method disclosed in the present invention, a voltage is applied to the brush, and the rotating body rotates in a state where the magnetized magnet is not connected. Therefore, since the induced electromotive force generated in the winding is not generated by the magnet, the rotating body can rotate at a high speed while applying a large current, and the aging speed of the motor can also be faster than that of the conventional aging method.

[0055] In one embodiment, rotating the armature and the commutator together by the rotation of the shaft may mean rotating the shaft in a first direction in a first time period and in a second direction in a second time period. For example, the first direction and the second direction may be different directions. That is, the first direction may be clockwise and the second direction may be counterclockwise, or vice versa. As another example, the first time period and the second time period may be set to the same time range. As another example, the first time period and the second time period may be set to different time ranges. For example, if the first time period is 1 second, the second time period may be set to more than 1 second.

[0056] Alternatively, the above directions, time periods and speeds may be combined in various embodiments. For example, the rotation of the commutator by the rotation of the shaft may be performed in a clockwise direction for 10 seconds and then in a counterclockwise direction for 10 seconds. Alternatively, the rotation of the commutator by the rotation of the shaft may be performed in a clockwise direction for 20 seconds, and the speed of the first 10 seconds and the speed of the last 10 seconds may be different from each other. Alternatively, the rotation of the commutator by the rotation of the shaft may be performed in a clockwise direction for 5 seconds and in a counterclockwise direction for 15 seconds. In addition, various embodiments of fixed and variable speeds, same and opposite directions, same and different time periods may be combined with each other.

[0057] In the present disclosure, a housing including a magnetized magnet magnetized in a magnetizing device is connected to the assembled shaft, armature, commutator and brush. The magnet is magnetized in a magnetizing device separated from the motor, shaft rotating motor and power supply of the present disclosure, and after aging of the contact surface between the commutator and the brush is completed, the housing including the magnetized magnet is connected to the motor. In the motor manufacturing method of the present disclosure, instead of rotating a motor having a housing including a magnetized magnet to age the motor, or instead of combining a housing including a magnet in a pre-magnetized state after aging the motor and connecting the motor to a magnetizing device to magnetize the motor, the motor is aged in a state without including the magnet before being connected to the housing, and the housing including the magnet magnetized in a separate magnetizing device is connected to the motor. Therefore, since aging can be performed by rotating the motor without the back electromotive force of the magnet, effective aging can be achieved in a short time.

[0058] As described above, according to the present disclosure, by rotating the armature and commutator fixed to the shaft or rotating the commutator in a state where no magnetizing magnet is provided, and applying voltage to the brush so that current flows through the commutator, a carbon layer is formed on the surface of the commutator while the surface of the commutator is aged. In the present disclosure, since the surface aging and carbon layer formation of the commutator are performed in a state where the magnetizing magnet is not connected, the aging effect can be maximized, and since the back electromotive force of the magnet is not generated, the aging process time can be shortened by high speed and high current.

[0059] In one embodiment, the motor manufacturing method of the present disclosure may include: assembling a shaft, a commutator fixed to the shaft and rotatably disposed, and a brush in contact with a portion of the surface of the commutator; aging the contact surface of the brush and the commutator by applying a voltage to the brush and rotating the commutator together by the rotation of the shaft; and connecting a housing including a magnetizing magnet magnetized in a magnetizing device to the assembled shaft, commutator, and brush. That is, in this embodiment, aging the contact surface of the brush and the commutator is achieved in a state before the housing including the armature and the magnet is coupled.

[0060] The motor manufacturing method of this embodiment can refer to Figure 7 . Figure 7 1 is a diagram for explaining a motor manufacturing method according to an embodiment of the present disclosure, in which the motor is aged by rotating a rotating body excluding an armature in a state where a shaft rotating motor and a power source are connected to a shaft and a brush, respectively.

[0061] According to the present disclosure, first, a shaft, a commutator fixed to the shaft and rotating with the armature, and a brush contacting a portion of the surface of the commutator are assembled. The aged motor 700 is not in a fully assembled state with the armature, magnets, and housing, but is in a state excluding the armature, magnetized magnets, and housing for encapsulating the motor.

[0062] In a basic assembly state where the shaft, commutator and brush are assembled, the power supply 720 applies voltage to the brush. In addition, the shaft rotating motor 710 rotates the shaft. The commutator of the motor 700 fixed to the shaft is also rotated by the rotation of the shaft, so the contact surface between the commutator and the brush is aged.

[0063] In one embodiment, in the step of aging the surface of the commutator by applying voltage to the brushes and rotating the commutator together by rotation of the shaft, a carbon layer is formed on the surface of the commutator by applying current to the commutator by the voltage applied to the brushes.

[0064] In one embodiment, the voltage applied to the brush may be set to a voltage greater than or equal to a voltage at which exothermic dissolution begins by applying a current to the commutator by the voltage applied to the brush. A current is applied to the brush and the commutator by the voltage applied to the brush, and the temperature rises. Therefore, by exothermic dissolution, a carbon layer may be laminated on the contact surface of the brush and the commutator.

[0065] In one embodiment, the shaft can be rotated at a constant speed by rotating the commutator together with the rotation of the shaft. In another embodiment, the shaft can be rotated at a variable speed by rotating the commutator together with the rotation of the shaft. Since the DC motor manufactured by the motor manufacturing method of the present disclosure applies voltage to the brush and the rotating body rotates in a state where the magnetized magnet is not connected, the induced electromotive force generated by the magnet in the winding is not generated. Therefore, the rotating body can rotate at a high speed while applying a large current, and the aging speed of the motor can also be faster than that of the conventional aging method.

[0066] In one embodiment, the shaft rotation motor can cause the shaft to rotate clockwise in a first time period and counterclockwise in a second time period. Alternatively, as described above, the direction of rotation of the first time period and the second time period can be the same. As an example, the first time period and the second time period can be the same or different. For example, the rotation of the commutator by the rotation of the shaft can be performed in a clockwise direction for 10 seconds and then in a counterclockwise direction for 10 seconds. In addition, as described above, the rotation operation can be determined by a combination of various embodiments of speed, direction, and time period.

[0067] In the present disclosure, a housing including an armature and a magnetized magnet magnetized in a magnetizing device is connected to the assembled shaft, armature, commutator and brush. The magnet is magnetized in a magnetizing device separated from the motor, shaft rotating motor and power supply of the present disclosure, and after aging of the contact surface between the commutator and the brush is completed, the housing including the armature and the magnetized magnet is connected to the motor. In the motor manufacturing method of the present disclosure, instead of rotating a motor having a housing including a magnetized magnet to age the motor, or instead of combining a housing including a magnet in a pre-magnetized state after aging the motor and connecting the motor to a magnetizing device to magnetize the motor, the motor is aged in a state without including the magnet before being connected to the housing, and the housing including the magnet magnetized in a separate magnetizing device is connected to the motor. Therefore, since aging can be performed at high speed and high current by rotating the motor without the back electromotive force of the magnet, effective aging can be achieved in a short time.

[0068] Figure 8 is a diagram showing a configuration of a motor manufacturing system according to an embodiment of the present disclosure. Figure 8 The motor manufacturing system 800 of the present disclosure may include: a voltage applicator 810 for applying voltage to the brushes after assembling a shaft, an armature fixed to the shaft and rotatably arranged, a commutator fixed to the shaft and rotating with the armature, and a brush in contact with a portion of the surface of the commutator; a shaft rotating device 820, which rotates the shaft to age the contact surfaces of the brushes and the commutator by rotating the armature and the commutator; and a motor assembling device 830, which is used to connect a housing including a magnetized magnet magnetized in a magnetizing device to the assembled shaft, armature, commutator and brushes.

[0069] According to the present disclosure, first, a shaft, an armature fixed to the shaft and rotatably arranged, a commutator fixed to the shaft and rotating with the armature, and a brush in contact with a portion of the surface of the commutator can be assembled. In this case, in addition to a housing including a magnet inside, components such as a shaft, an armature, a commutator, a brush, and a spring for pressing the brush in the direction of the commutator are assembled. That is, the aged motor is not in a state of being fully assembled with the magnet and the housing, but in a state of not including a magnetized magnet and a housing for accommodating the motor.

[0070] In a basic assembly state formed by assembling the shaft, armature, commutator and brush, a voltage applicator 810 applies a voltage to the brush. In addition, the shaft rotating device 820 rotates the shaft. By the rotation of the shaft, the armature and commutator of the motor fixed to the shaft also rotate, and therefore, the contact surface between the commutator and the brush deteriorates.

[0071] In one embodiment, a carbon layer is formed on the surface of the commutator by applying a current to the commutator by a voltage applied to the brush by a voltage applicator 810. In a basic assembled state formed by assembling the shaft, the armature, the commutator, and the brush, a voltage is applied to the brush by electricity, and the rotating body rotates by the shaft rotating motor. In this case, when the brush becomes negative (-) and the commutator becomes positive (+), a tiny arc discharge phenomenon occurs in the tiny gap therebetween, and electrons from the brush move from the negative (-) side to the positive (+) side toward the commutator. If the electrons emitted from the brush collide with the surface of the commutator, copper, which is the commutator material, may evaporate. The evaporated copper atoms collide with the moving electrons and emit electrons to become Cu2 + If the positive ions collide with the surface of the brush, which is the negative electrode, carbon atoms are emitted and a carbon layer is formed on the surface of the commutator. In addition, at this time, the commutator is heated by generating heat by the current, so that the carbon emitted from the brush can be attached to the surface of the commutator relatively easily.

[0072] In addition, if the brush is positive (+) and the commutator is negative (-), electrons move from the commutator toward the brush. Carbon particles on the brush surface are separated by the collision of electrons and attached to the surface of the commutator. Therefore, if a voltage is applied to the brush and the commutator rotates, an almost uniform carbon layer can be formed on the surface of the commutator.

[0073] In one embodiment, the voltage applied to the brush may be set to a voltage greater than or equal to a voltage at which exothermic dissolution begins by applying a current to the commutator by the voltage applied to the brush. A current is applied to the brush and the commutator by the voltage applied to the brush, and the temperature rises. Therefore, by exothermic dissolution, a carbon layer may be laminated on the contact surface of the brush and the commutator.

[0074] In one embodiment, the shaft rotating device 820 can rotate the shaft. The description of the rotation speed, rotation direction, and rotation time period is omitted because they correspond to the above description. That is, rotating the armature and commutator together by rotating the shaft can mean rotating the shaft, armature, and commutator at a constant speed. According to the motor manufactured by the motor manufacturing system of the present disclosure, since a voltage is applied to the brush and the rotating body rotates in a state where the magnetized magnet is not connected, the induced electromotive force generated in the winding is not generated by the magnet. Therefore, the rotating body can rotate at a high speed while applying a large current, and the aging speed of the motor can also be faster than that of the conventional aging method.

[0075] In one embodiment, the shaft rotation motor 520 can rotate the shaft clockwise in a first time period and counterclockwise in a second time period. As an example, the first time period and the second time period can be the same. In addition, the above-mentioned speed, rotation direction and rotation time period can be combined and performed differently. For example, the rotation of the commutator by the rotation of the shaft can be performed in a clockwise direction for 10 seconds and then in a counterclockwise direction for 10 seconds.

[0076] In the present disclosure, the motor assembly device 830 connects the housing including the magnets magnetized in the magnetizing device to the assembled shaft, armature, commutator and brush. The magnet is magnetized in the magnetizing device separated from the motor, shaft rotating motor and power supply of the present disclosure, and after the aging of the contact surface between the commutator and the brush is completed, the housing including the magnetized magnet is connected to the motor. In the motor manufacturing system of the present disclosure, instead of rotating the motor having the housing including the magnetized magnet to age the motor, or instead of combining the housing including the magnets in the pre-magnetized state after aging the motor and connecting the motor to the magnetizing device to magnetize the motor, the motor is aged in a state without including the magnets before being connected to the housing, and the housing including the magnets magnetized in the separate magnetizing device is connected to the motor. Therefore, since the aging can be performed by rotating the motor without the back electromotive force of the magnet, effective aging can be achieved in a short time.

[0077] As described above, according to the present disclosure, by rotating the armature and commutator fixed to the shaft or rotating the commutator in a state where no magnetizing magnet is provided, and applying voltage to the brush so that current flows through the commutator, a carbon layer is formed on the surface of the commutator while the surface of the commutator is aged. According to the present disclosure, since the surface aging and carbon layer formation of the commutator are performed in a state where the magnetizing magnet is not connected, the aging effect can be maximized, and since the back electromotive force of the magnet is not generated, the aging process time can be shortened by high speed and high current.

[0078] In one embodiment, the motor manufacturing system of the present disclosure may include: a voltage applicator for applying voltage to the brushes after assembling a shaft, a commutator fixed to the shaft and rotatably arranged, and a brush in contact with a portion of the surface of the commutator; a shaft rotating device for rotating the shaft to age the surface of the commutator by rotating the commutator; and a motor assembling device for connecting a housing including a magnetized magnet magnetized in a magnetizing device to the assembled shaft, armature, commutator, and brushes. That is, in this embodiment, aging the contact surfaces of the brushes and the commutator is performed in a state before the housing including the armature and the magnet is connected. The motor manufacturing system of the present embodiment may utilize the motor aging method of the above-mentioned motor manufacturing system without including an armature. Therefore, the description of the motor manufacturing system of the present embodiment may refer to the above-mentioned Figure 8 Description of the motor manufacturing system.

[0079] The above-mentioned terms "system", "processor", "controller", "component", "module", "interface", "model", "unit", etc. may generally refer to computer-related physical hardware, a combination of hardware and software, software, or software in execution. For example, the above-mentioned components may be processes run by a processor, processors, controllers, control processors, objects, execution threads, programs, and / or computers, but are not limited thereto. For example, an application running on a controller or processor and the controller or processor may be a component. One or more components may reside within a process and / or execution thread, and a component may be located on one system or distributed on two or more systems.

[0080] Terms such as "including", "comprising" or "having" mentioned above mean that the corresponding components can be embedded, unless otherwise specified, and they should not be constructed to exclude other components, but may further include other components. Unless otherwise defined, all terms (including technical and scientific terms) have the same meaning as commonly understood by ordinary technicians in the field to which the present disclosure belongs. Commonly used terms (such as those defined in dictionaries) should be interpreted as consistent with the meaning of the context of the relevant technology, and should not be interpreted as an ideal or overly formal meaning unless clearly defined in the present disclosure.

[0081] The above description and drawings are presented to enable those skilled in the art to implement and use the technical ideas of the present disclosure, and are provided in the context of specific applications and their requirements. Various modifications, additions and substitutions to the described embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the present disclosure. The above description and drawings provide examples of the technical ideas of the present disclosure for illustrative purposes only. That is, the disclosed embodiments are intended to illustrate the scope of the technical ideas of the present disclosure. Therefore, the scope of the present disclosure is not limited to the embodiments shown, but is consistent with the widest scope consistent with the claims. The scope of protection of the present disclosure should be interpreted based on the attached claims, and all technical ideas within the scope of their equivalents should be interpreted as included within the scope of the present disclosure.

[0082] CROSS-REFERENCE TO RELATED APPLICATIONS

[0083] This patent application claims priority under Section 119(a) of the United States Patent Act (35 U.S.C. 119(a)) to Patent Application No. 10-2019-0087429 filed in Korea on July 19, 2019, the entire contents of which are incorporated by reference into this patent application. In addition, if this patent application claims priority in a country other than the United States for the same reasons as above, all the contents are incorporated into this patent application as reference.

Claims

1. A motor manufacturing method, the motor manufacturing method comprising the following steps: (1) assembling a shaft, an armature fixed to the shaft and rotatably disposed, a commutator fixed to the shaft and rotating together with the armature, and a brush in contact with a portion of a surface of the commutator; (2) aging the contact surface of the brush and the commutator by applying a voltage to the brush and rotating the armature and the commutator together by the rotation of the shaft; as well as (3) A housing including the magnetizing magnets magnetized in the magnetizing device is connected to the assembled shaft, armature, commutator and brushes.

2. The motor manufacturing method according to claim 1, wherein: The step of aging the contact surface of the brush and the commutator by applying a voltage to the brush and rotating the armature and the commutator together by the rotation of the shaft includes forming a carbon layer on the surface of the commutator by applying a current to the commutator by the voltage applied to the brush.

3. The motor manufacturing method according to claim 2, wherein: The voltage applied to the brush is set to a voltage equal to or higher than a voltage at which exothermic dissolution starts by applying a current to the commutator by the voltage applied to the brush.

4. The motor manufacturing method according to claim 1, wherein: Rotating the armature and the commutator together via rotation of the shaft includes rotating the shaft in a first direction for a first period of time and in a second direction for a second period of time.

5. The motor manufacturing method according to claim 4, wherein: The first direction and the second direction are opposite directions.

6. The motor manufacturing method according to claim 4, wherein: The first time period and the second time period are set to different time ranges.

7. A method for manufacturing a motor, comprising the following steps: (1) assembling a shaft, a commutator fixed to the shaft and rotatably arranged, and a brush contacting a portion of a surface of the commutator; (2) aging the contact surface of the brush and the commutator by applying a voltage to the brush and rotating the commutator together with the rotation of the shaft; as well as (3) A housing including an armature and a magnetizing magnet magnetized in a magnetizing device is connected to the assembled shaft, commutator, and brushes.

8. The motor manufacturing method according to claim 7, wherein: The step of aging the contact surface of the brush and the commutator by applying a voltage to the brush and rotating the commutator together by the rotation of the shaft includes forming a carbon layer on the surface of the commutator by applying a current to the commutator by the voltage applied to the brush.

9. A motor manufacturing system, comprising: a voltage applicator for applying a voltage to the brush after assembling a shaft, an armature fixed to the shaft and rotatably disposed, a commutator fixed to the shaft and rotating with the armature, and a brush in contact with a portion of a surface of the commutator; a shaft rotating device that rotates the shaft to age the contact surfaces of the brush and the commutator by rotating the armature and the commutator; as well as A motor assembling device for connecting a housing including a magnetizing magnet magnetized in a magnetizing device to an assembled shaft, an armature, a commutator and a brush.

10. The motor manufacturing system according to claim 9, wherein: The voltage applicator forms a carbon layer on the surface of the commutator by applying a current to the commutator by a voltage applied to the brush.

11. The motor manufacturing system according to claim 10, wherein: The voltage applied to the brush is set to a voltage equal to or higher than a voltage at which exothermic dissolution starts when a current is applied to the commutator by the voltage applied to the brush.

12. The motor manufacturing system according to claim 9, wherein: The shaft rotating device rotates the shaft in a first direction during a first period of time and in a second direction during a second period of time.

13. The motor manufacturing system according to claim 12, wherein: The first direction and the second direction are opposite directions.

14. The motor manufacturing system according to claim 12, wherein: The first time period and the second time period are set as different time ranges.

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