A brush holder and a generator field current supply device equipped with the brush holder

Abstract

The present invention relates to a brush holder and a generator excitation current supply device equipped with the same, and more particularly, to a brush holder capable of measuring the temperature of a brush and a generator excitation current supply device equipped with the same. In the brush holder according to one embodiment of the present invention, the lower portion of a guide pin is disposed inside a brush, and a temperature sensor is disposed inside the guide pin, so that the temperature of the brush can be precisely measured.

Description

Technical Field

[0001] This invention relates to a brush holder and a generator excitation current supply device equipped with the brush holder, and more particularly to a brush holder capable of measuring the temperature of the brushes and a generator excitation current supply device equipped with the brush holder (brush holder and brush holder rigging including the same). Background Technology

[0002] A generator excitation current supply device (BHR) is a device that supplies current from an external exciter to the collector rings of a generator.

[0003] The current supplied from the exciter can be sequentially transmitted to the busbars and brush holders. Additionally, current can be transferred from the brushes to the slip rings through friction between the brushes and slip rings.

[0004] The brushes wear down due to continuous friction caused by the rotor's rotation, potentially leading to shortening in length and increased frictional heat. Furthermore, the heat generated by the current flowing through the brushes can cause their temperature to rise. When these conditions are repeated continuously, it can potentially lead to serious accidents such as fires.

[0005] Therefore, the condition of the brushes needs to be monitored by measuring the temperature of each brush. However, because the current flowing through the brushes is quite large, the possibility of electric shock is high if the operator directly touches the temperature measuring device to measure the temperature.

[0006] Furthermore, for non-contact temperature measurement devices using infrared thermal imaging, there is a problem of insufficient precision due to the relatively large error range in temperature measurement.

[0007] Furthermore, the space for the generator excitation current supply device is limited, so there are space constraints when adding a separate device for measuring the temperature of the brushes. Summary of the Invention

[0008] The purpose of this invention is to provide a brush holder capable of measuring the temperature of the brushes and a generator excitation current supply device equipped with the brush holder.

[0009] A brush holder according to one embodiment of the present invention may include a main body, a guide pin, and a temperature sensor. A brush may be disposed on the underside of the main body. The upper part of the guide pin may be disposed on the main body. The lower part of the guide pin may be disposed inside the brush. The temperature sensor may be disposed on the guide pin.

[0010] The brush holder according to one embodiment of the present invention may further include a control unit. The control unit can transmit the measured values ​​of the temperature sensor to the administrator's terminal.

[0011] A hollow space may be formed inside the guide pin according to one embodiment of the present invention along the vertical direction. A temperature sensor may be configured within the hollow space.

[0012] In one embodiment of the present invention, the brush may have a pin insertion hole formed along the vertical direction, and the lower part of the guide pin is inserted into the pin insertion hole.

[0013] A temperature sensor according to one embodiment of the present invention may include a junction and a sensor cable. The junction can measure the temperature of the brush. The lower end of the sensor cable can be connected to the junction.

[0014] According to one embodiment of the present invention, the brush holder may further include a control unit housing and a printed circuit board. The control unit housing may be disposed on the upper part of the main body. The printed circuit board may be disposed inside the control unit housing for mounting the control unit. The printed circuit board may be connected to the upper end of the second sensor cable.

[0015] The brush holder according to one embodiment of the present invention may further include a lifting part. The lifting part can raise or lower the guide pin.

[0016] According to one embodiment of the present invention, the lifting part may be equipped with a coupling ring, a gear, and a motor. The coupling ring may be penetrated by a guide pin and threadedly engaged with the guide pin. The gear may mesh with teeth formed on the outer peripheral surface of the coupling ring. The motor may be mounted on the gear, thereby causing the gear to rotate.

[0017] According to one embodiment of the present invention, the brush holder may further include a hook component and a fixing rod. The hook component may be disposed on the side of the main body. The fixing rod may apply pressure to the hook component, thereby securing the hook component to or separating it from the brush.

[0018] The brush holder according to one embodiment of the present invention may further include a handle. The handle may be disposed on the upper part of the fixing rod.

[0019] A pressure protrusion may be formed at the upper end of the hook component according to one embodiment of the present invention. A hook may be formed at the lower end of the hook component. A protrusion insertion groove may be formed on the fixing rod for inserting the pressure protrusion.

[0020] When the fixing rod rotates in the forward direction according to one embodiment of the present invention, the pressure protrusion can be pulled out from the protrusion insertion groove, and the hook is separated from the brush.

[0021] When the fixed rod rotates in reverse according to one embodiment of the present invention, the pressure protrusion can be introduced into the protrusion insertion groove, and the hook is engaged with the brush.

[0022] A generator excitation current supply device according to one embodiment of the present invention may include a rotor, slip rings, a busbar, brushes, and a brush holder. The slip rings may be penetrated by and fixed to the rotor of the generator. The busbar may be penetrated by the slip rings. The brushes may contact the slip rings. Brushes may be disposed in the brush holder, thereby connecting the brush holder to the busbar.

[0023] In a brush holder and a generator excitation current supply device equipped with the brush holder according to one embodiment of the present invention, the lower part of the guide pin is disposed inside the brush, and a temperature sensor is disposed inside the guide pin, thereby enabling precise measurement of the brush temperature. This allows the administrator to measure the brush temperature without direct contact with the brush, thus eliminating the possibility of electric shock.

[0024] Furthermore, the control unit can transmit the brush temperature to the administrator's terminal, allowing the administrator to monitor the brush status in real time. While monitoring the brushes, the administrator can selectively decide whether to replace them or operate the generator.

[0025] Furthermore, the temperature sensor can be configured inside the guide pin, eliminating the need to ensure separate space within the generator excitation current supply unit. Therefore, it can also be applied to previously designed generator excitation current supply units, potentially enabling commercial scalability. Attached Figure Description

[0026] Figure 1 This is a side view of the generator excitation current supply device.

[0027] Figure 2 This is a cross-sectional view of the generator excitation current supply device.

[0028] Figure 3 This is a perspective view of one side of a brush holder according to one embodiment of the present invention.

[0029] Figure 4 This is a 3D view of the other side of the brush holder.

[0030] Figure 5 yes Figure 3 The AA cross-section diagram shown.

[0031] Figure 6 yes Figure 5 The enlarged view of part A shown in the image.

[0032] Figure 7This is a side view illustrating the state in which the brush is fixed to the hook component.

[0033] Figure 8 This is a side view illustrating the state of the brush detached from the hook component.

[0034] Figure 9 yes Figure 3 The BB cross-section diagram shown.

[0035] Figure 10 It is a 3D diagram illustrating the downward state of the sensor block and brush.

[0036] Figure 11 yes Figure 9 The enlarged view of part B shown in the figure.

[0037] Figure 12 (a) and Figure 12 (b) is a three-dimensional view illustrating one side and the other side of the sensor block.

[0038] Figure 13 This is a side-view 3D diagram illustrating multiple sensor blocks and brushes.

[0039] Figure 14 This is a three-dimensional view illustrating multiple sensor blocks and brushes from another side.

[0040] Figure 15 (a) to Figure 15 (c) is a perspective view illustrating one side, the back, and the other side of a single sensor block and brush.

[0041] Figure 16 It is a three-dimensional diagram illustrating the state of the wiring conduit separated from the partition.

[0042] Figure 17 This is a three-dimensional diagram illustrating the state of the main cover plate separated from the brush holder.

[0043] Figure 18 This is a three-dimensional view of the main body.

[0044] Figure 19 This is a three-dimensional diagram illustrating the state in which the outer cover plate is separated from the sensor housing.

[0045] Figure 20 (a) and Figure 20 (b) is a perspective view illustrating the first embodiment of the sensor housing, showing the shielding plate separated from the sensor housing.

[0046] Figure 21 (a) and Figure 21(b) is a perspective view illustrating a second embodiment of the sensor housing, showing the housing cover plate separated from the sensor housing.

[0047] Figure 22 (a) and Figure 22 (b) is a schematic cross-sectional view of the lifting part in the brush holder according to the second embodiment of the present invention, illustrating the state in which the guide pin is raised.

[0048] Explanation of reference numerals in the attached figures

[0049] 10: Generator excitation current supply device

[0050] 11: Rotor

[0051] 12: Slip ring

[0052] 13: Busbar

[0053] 14: Brushes

[0054] 15: Brush holder

[0055] 1000: Brush holder

[0056] 1100: Main body

[0057] 1110: Brush

[0058] 1111: Support groove

[0059] 1112: Pin insertion hole

[0060] 1120: Guide pin

[0061] 1121: Hollow

[0062] 1122: Guide Cap

[0063] 1130: Partition

[0064] 1131: Partition side fixing groove

[0065] 1140: Coil Spring

[0066] 1200: Connecting part

[0067] 1210: Terminal block

[0068] 1220: Electric wire

[0069] 1230: Magnetic field sensor

[0070] 1240, 1240': Sensor housing

[0071] 1241: Plate Insertion Slot

[0072] 1242: Hook protrusion

[0073] 1242a: Inclined surface

[0074] 1243: Sliding groove

[0075] 1244: Support protrusion

[0076] 1250: Shielding plate

[0077] 1260, 1260': Outer shell cover

[0078] 1261: Handle protrusion

[0079] 1262: Combined with protrusions

[0080] 1263: Handle protrusion

[0081] 1300: Main cover plate

[0082] 1310: Upper cover plate

[0083] 1320: Lower cover plate

[0084] 1321: Next door

[0085] 1400: Control unit housing

[0086] 1410: Printed Circuit Board

[0087] 1500: Sensor Block

[0088] 1510: Vibration sensor

[0089] 1520: Distance Sensor

[0090] 1521: First sensor cable

[0091] 1530: Open Hole

[0092] 1540: Block wiring hole

[0093] 1550: Through-hole

[0094] 1560: Wiring conduit

[0095] 1561: Conduit wiring hole

[0096] 1562: Wiring conduit side fixing groove

[0097] 1563: Wiring cap

[0098] 1570: Spring insertion hole

[0099] 1580: Spring support slot

[0100] 1590: Connecting protrusion

[0101] 1600: Temperature sensor

[0102] 1610: Joint

[0103] 1620: Second sensor cable

[0104] 1700: Hook component

[0105] 1710: Pressure-pressurized protrusion

[0106] 1720: Hook

[0107] 1800: Fixed rod

[0108] 1810: Handle

[0109] 1820: Raised Insert Slot

[0110] 1900: Elevator

[0111] 1910: Combination ring

[0112] 1920: Gear

[0113] 1930: Electric motor Detailed Implementation

[0114] This invention can be modified in many ways and has many embodiments. Specific embodiments will be illustrated and described in detail below. However, this is not intended to limit the invention to a particular implementation, but rather to encompass all modifications, equivalents, and substitutions within the scope of the invention's concept and technology.

[0115] The terminology used in this invention is for illustrative purposes only and is not intended to limit the invention. Singular statements also have plural meanings unless the context clearly indicates otherwise. In this invention, terms such as "comprising" or "having" are used only to indicate the presence of features, numbers, steps, actions, constituent elements, components, or combinations thereof described in the specification, but should not be construed as excluding the possibility of one or more other features, numbers, steps, actions, constituent elements, components, or combinations thereof being present or added.

[0116] Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same reference numerals are used as much as possible for the same constituent elements in the drawings. Furthermore, detailed descriptions related to well-known functions and structures that may obscure the essence of the invention will be omitted. For the same reason, some constituent elements in the drawings may be exaggerated, omitted, or shown in a schematic manner.

[0117] Figure 1 It is a side view of the generator excitation current supply device, and Figure 2 This is a cross-sectional view of the generator excitation current supply device.

[0118] like Figure 1 as well as Figure 2 As shown, the generator excitation current supply device 10 may include a slip ring 12, a busbar 13, a brush 14, and a brush holder 15. The slip ring 12 may be passed through the rotor 11 and fixed to the rotor 11.

[0119] Busbar 13 can be formed in a ring shape. Busbar 13 can be penetrated by slip ring 12. Brush 14 can be made of carbon material. Brush 14 can contact the outer peripheral surface of slip ring 12.

[0120] The brush holder 15 can accommodate multiple brushes 14 arranged in a row and fixed in place. In addition, the brush holder 15 can be composed of multiple brushes spaced apart from each other along the circumference of the busbar 13, thereby being connected to or separated from the busbar 13.

[0121] Figure 3 This is a perspective view of one side of a brush holder according to one embodiment of the present invention. Figure 4 This is a 3D view of the other side of the brush holder. Figure 5 yes Figure 3 The AA section diagram shown. Figure 6 yes Figure 5 Enlarged view of part A shown in the figure. Figure 7 This is a side view illustrating the state in which the brush is fixed to the hook component, and Figure 8 This is a side view illustrating the state of the brush detached from the hook component.

[0122] like Figures 3 to 8 As shown, the brush holder 1000 can be manufactured using known materials such as metal that allow current to flow. The brush holder 1000 may include a main body 1100, a guide pin 1120, a temperature sensor 1600, a control unit, and a control unit housing 1400.

[0123] The main body 1100 can be connected to the busbar 13 (e.g. Figure 2 (As shown) Combined with bus 13, it receives current. The main body 1100 can be " The shape is formed as shown in the figure. Multiple brushes 1110 can be configured and arranged in a row on the lower side of the main body 1100.

[0124] The control unit housing 1400 can be formed in the form of a hollow hexahedron. The control unit housing 1400 can be fixed to the upper side of the main body 1100, and a printed circuit board 1410 can be fixed inside it.

[0125] The fixing between the control unit housing 1400 and the main body 1100 can be accomplished by known fixing components such as bolts and screws or by welding. This fixing method can be applied to the fixing between all components constituting the brush holder 1000, and related repeated descriptions are omitted.

[0126] The printed circuit board 1410 can be equipped with components related to the operation of the brush holder 1000, including a control unit and a communication unit.

[0127] Furthermore, the first sensor cable 1521 and the second sensor cable 1620, described later, can penetrate the lower side of the control unit housing 1400 and connect to the printed circuit board 1410. Additionally, the magnetic field sensor 1230 (such as...) Figure 19 (As shown) It can also be connected to the printed circuit board 1410 via a cable.

[0128] The guide pin 1120 is used to fix the brush 1110 in a manner that allows it to move stably in the vertical direction. The upper end of the guide pin 1120 can be fixed to the main body 1100. The brush 1110 can have a pin insertion hole 1112 formed in the vertical direction. The lower part of the guide pin 1120 can be inserted into the pin insertion hole 1112 (e.g., ...). Figure 9 (as shown), thus configured inside the brush 1110.

[0129] The temperature sensor 1600 can use a thermocouple. A junction 1610 can be formed at the lower end of the thermocouple to measure the temperature of the brush 1110. The junction 1610 can be connected to the printed circuit board 1410 via a second sensor cable 1620.

[0130] Temperature sensor 1600 can be disposed in guide pin 1120. A hollow space 1121 can be formed inside guide pin 1120 along the vertical direction. Temperature sensor 1600 can be configured in hollow space 1121.

[0131] That is, the junction 1610 can be configured inside the brush 1110 to directly measure the temperature of the brush 1110, thereby improving the reliability of temperature measurement. The control unit can be connected to the administrator's terminal (e.g., smartphone, personal computer (PC)) wirelessly or via a wired connection. The control unit can transmit the measured value of the temperature sensor 1600 to the terminal, thereby enabling the administrator to monitor the status of the brush 1110 in real time.

[0132] The administrator can monitor the brush 1110 while selectively deciding whether to replace the brush 1110 or whether the generator should operate. A guide pin cap 1122 can be embedded in the upper end of the guide pin 1120 to maintain the airtightness of the guide pin 1120.

[0133] The brush holder 1000 may also include a hook component 1700, a fixing rod 1800, and a handle portion 1810. The hook component 1700 may be formed in a plate-like shape. The hook component 1700 may be fixed to the side of the main body portion 1100. The fixing rod 1800 may extend through the control housing 1400 in the vertical direction.

[0134] The fixing rod 1800 can apply pressure to the hook component 1700, thereby fixing the hook component 1700 to or separating it from the brush 1110. The handle portion 1810 can be formed in a plate-like or block-like form. The handle portion 1810 can be fixed to the upper end of the fixing rod 1800.

[0135] A pressure protrusion 1710 can be formed on the upper end of the hook component 1700 toward the fixing rod 1800. A hook 1720 can be formed on the lower end of the hook component 1700 toward the brush 1110. A protrusion insertion groove 1820 can be formed on the circumferential surface of the fixing rod 1800 for the pressure protrusion 1710 to be inserted.

[0136] When the fixing rod 1800 rotates forward, the pressure protrusion 1710 is pulled out from the protrusion insertion slot 1820, and the fixing rod 1800 applies pressure to the pressure protrusion 1710, thereby causing the hook 1720 to separate from the side of the brush 1110. When the fixing rod 1800 rotates in the reverse direction, the pressure protrusion 1710 is introduced into the protrusion insertion slot 1820, and the hook 1720 returns to its original position, thereby engaging with the side of the brush 1110.

[0137] That is, the brush 1110 is fixed to the hook component 1700, thereby preventing accidental detachment from the main body 1100. The operator can stably move the brush holder 1000 while the brush 1110 is fixed to the main body 1100, thereby connecting it to the busbar 13 (e.g., Figure 2 (As shown) combine or separate.

[0138] Figure 9 yes Figure 3 The BB cross-section diagram shown. Figure 10 This is a 3D diagram illustrating the descending state of the sensor block and brush. Figure 11 yes Figure 9 The enlarged view of part B shown in the figure. Figure 11 yes Figure 9 The enlarged view of part B shown in the figure, and Figure 12 (a) and Figure 12 (b) is a three-dimensional view illustrating one side and the other side of the sensor block.

[0139] like Figures 9 to 12As shown in (b), the brush holder may also include a sensor block 1500, a vibration sensor 1510, a distance sensor 1520, a partition 1130, and a coil spring 1140.

[0140] The sensor block 1500 can be formed in the shape of a hollow hexahedron. A through hole 1550 can be formed in the sensor block 1500 along the vertical direction (e.g., ...). Figure 12 As shown in (a), the sensor block 1500 is thus penetrated by the guide pin 1120. The sensor block 1500 can be disposed between the main body 1100 and the brush 1110 by the guide pin 1120.

[0141] A vibration sensor 1510 can be installed in the sensor block 1500 to measure the vibration transmitted from the brush 1110. A distance sensor 1520 can be installed in the sensor block 1500 to measure the wear of the brush 1110. The wear of the brush 1110 can be defined by the change in the length of the brush 1110 over a certain period of time.

[0142] The distance sensor 1520 can use laser output. An open hole 1530 can be formed on the upper side of the sensor block 1500 (e.g., ...). Figure 11 (As shown). The distance sensor 1520 can be disposed on the inner upper side of the sensor block 1500, thereby being configured in the open hole 1530.

[0143] That is, the laser emitted from the distance sensor 1520 can pass through the opening 1530 and reach the upper side of the main body 1100, thereby measuring the distance between the sensor block 1500 and the main body 1100.

[0144] Furthermore, as the brush 1110 wears down and becomes shorter, the distance between the sensor block 1500 and the main body 1100 increases. The control unit can calculate the consumption of the brush 1110 based on the measurements from the distance sensor 1520.

[0145] The vibration sensor 1510 can be fixed to the lower inner part of the sensor block 1500. The lower end of the sensor block 1500 and the upper end of the brush 1110 can be kept in contact by means of the coil spring 1140. Therefore, the vibration of the brush 1110 can be directly transmitted to the vibration sensor 1510, thereby improving the reliability of vibration measurement.

[0146] The control unit can transmit the measured values ​​from the distance sensor 1520 and vibration sensor 1510, as well as the wear of the brush 1110, to the administrator's terminal, enabling the administrator to monitor the status of the brush 1110 in real time. While monitoring the brush 1110, the administrator can selectively decide whether to replace the brush 1110 or operate the generator.

[0147] A connecting protrusion 1590 can be formed on the lower side of the sensor block 1500 (e.g., Figure 11 (As shown). A support groove 1111 can be formed on the upper side of the brush 1110 to allow the connecting protrusion 1590 to be inserted.

[0148] That is, by connecting the protrusion 1590 and the support groove 1111, the contact between the sensor block 1500 and the brush 1110 can be maintained more firmly. In addition, the vibration of the brush 1110 is prevented from being dispersed and transmitted to the sensor block 1500, thereby further improving the reliability of vibration measurement.

[0149] Distance sensor 1520 and vibration sensor 1510 can be connected to printed circuit board 1410 via first sensor cable 1521. A block wiring hole 1540 can be formed on the upper side of sensor block 1500 to allow the first sensor cable 1521 to pass through. Meanwhile, magnetic field sensor 1230 (such as...) Figure 15 As shown), the distance sensor 1520 and vibration sensor 1510 can also be connected to the terminal of the control unit or administrator wirelessly rather than via wired means.

[0150] The partition 1130 is configured to support the coil spring 1140. The partition 1130 can be fixed to the side of the main body 1100, thereby facing the side of the brush 1110. The coil spring 1140 can be fixed between the partition 1130 and the sensor block 1500, thereby causing the sensor block 1500 to descend.

[0151] That is, as the coil spring 1140 coils, the elastic force of the coil spring 1140 can be used to move the sensor block 1500, brush 1110, and slip ring 12 (such as... Figure 2 (As shown) They continuously maintain a state of contact with each other in sequence.

[0152] A spring insertion hole 1570 can be formed on the side of the sensor block 1500 to allow the upper part of the cylindrical coil spring 1140 to be inserted. A spring support groove 1580 can be formed on the inner lower side of the sensor block 1500.

[0153] The upper part of the coil spring 1140 can be placed in the spring support groove 1580, thereby being snapped into the sensor block 1500. The spring support groove 1580 can be formed in a semi-circular shape corresponding to the coil spring 1140.

[0154] Figure 13 This is a side-view 3D diagram illustrating multiple sensor blocks and brushes. Figure 14 This is a three-dimensional view illustrating multiple sensor blocks and brushes from another perspective. Figure 15 (a) to Figure 15 (c) is a perspective view illustrating one side, the back, and the other side of a single sensor block and brush, while Figure 16 It is a three-dimensional diagram illustrating the state of the wiring conduit separated from the partition.

[0155] like Figures 13 to 16 As shown, the brush holder may also include a wiring conduit 1560. The wiring conduit 1560 is a configuration for protecting the first sensor cable 1521. The wiring conduit 1560 is disposed at the upper end of the partition 1130 in a vertical direction, so that the first sensor cable 1521 can pass through.

[0156] A wiring conduit side fixing groove 1562 can be formed at the lower end of the wiring conduit 1560. A partition side fixing groove 1131 can be formed at the upper end of the partition 1130, thereby engaging with the wiring conduit side fixing groove 1562.

[0157] A wiring hole 1561 can be formed on the lower circumferential surface of the wiring tube 1560, so that the first sensor cable 1521 led out from the sensor block 1500 can pass through the wiring hole 1561 and pass through the wiring tube 1560. A wiring cap 1563 can be inserted into the upper end of the wiring tube 1560 to maintain the airtight state of the wiring tube 1560.

[0158] Figure 17 This is a three-dimensional diagram illustrating the state of the main cover plate separated from the brush holder. Figure 18 It is a three-dimensional view of the main body, and Figure 19 This is a three-dimensional diagram illustrating the state in which the outer cover plate is separated from the sensor housing.

[0159] like Figures 17 to 19 As shown, the brush holder 1000 may further include a connecting portion 1200, a magnetic field sensor 1230, and a main body cover 1300. The connecting portion 1200 may be disposed between the main body 1100 and the brush 1110, thereby transmitting current from the main body 1100 to the brush 1110.

[0160] A magnetic field sensor 1230 can be provided at the connection portion 1200 to measure the magnetic field of the connection portion 1200, and more specifically, the terminal block 1210 described later. The control unit can calculate the amount of current flowing on the brush 1110 based on the measurement value from the magnetic field sensor 1230. A known algorithm for calculating the current using the magnetic field can be preset in the control unit.

[0161] This allows for precise measurement of the current at each brush 1110, reducing the margin of error in current measurement. Furthermore, administrators can measure the current without direct contact with the brushes 1110, thus eliminating the possibility of electric shock.

[0162] The control unit can transmit the calculated current to the administrator's terminal, allowing the administrator to monitor the status of brush 1110 in real time. While monitoring brush 1110, the administrator can selectively decide whether to replace the brush or operate the generator if a specific brush exceeds a certain temperature range.

[0163] The connection portion 1200 may include a terminal bar 1210 and a wire 1220. The terminal bar 1210 and the wire 1220 may be respectively equipped with the brush 1110. The upper end of the terminal bar 1210 may be fixed to the upper side of the main body 1100. A magnetic field sensor 1230 may be disposed and fixed on the side of the terminal bar 1210. The wire 1220 may be fixed between the lower end of the terminal bar 1210 and the upper end of the brush 1110.

[0164] The main cover 1300 may include an upper cover 1310 and a lower cover 1320. The upper cover 1310 may be fixed to the control unit housing 1400 to cover and protect the control unit housing 1400 and the terminal block 1210. The lower cover 1320 may be fixed to the main body 1100 to cover and protect the sides of the wire 1220 and the brush 1110.

[0165] Multiple partitions 1321 can be formed on the side of the main cover plate 1300, spaced apart from each other. Wires 1220 can be arranged between adjacent partitions 1321. That is, the wires 1220 can be separated by the partitions 1321 according to each brush 1110, thereby preventing overcurrent from flowing through the brush 1110 due to contact between adjacent wires 1220.

[0166] Figure 20 (a) and Figure 20 (b) is a perspective view illustrating the first embodiment of the sensor housing, showing the shielding plate separated from the sensor housing. Figure 21 (a) and Figure 21 (b) is a perspective view illustrating a second embodiment of the sensor housing, showing the housing cover plate separated from the sensor housing.

[0167] like Figure 19 , Figure 20 (a) and Figure 20 As shown in (b), the brush holder may further include a sensor housing 1240, a shielding plate 1250, and a housing cover 1260. The sensor housing 1240 may be formed as an internally hollow hexahedron, and the upper side, lower side, and side surfaces are removed. The sensor housing 1240 can be mounted on the terminal block 1210 to house the magnetic field sensor 1230.

[0168] The sensor housing 1240 can be penetrated by the terminal block 1210 along the vertical direction. A shielding plate 1250 can be provided on the inner side of the sensor housing 1240. As described above, because the brushes 1110 are arranged in a row in the main body 1100, interference may occur due to the magnetic field of the adjacent terminal block 1210.

[0169] Such magnetic field interference can lead to errors in magnetic field measurement. Therefore, a shielding plate 1250 can be used to shield the surrounding magnetic field, thereby improving the reliability of magnetic field measurement.

[0170] The shielding plate 1250 can be formed in a manner corresponding to the sensor housing 1240 as " The shielding plate 1250 can be arranged along the circumference of the sensor housing 1240 on the inner side of the sensor housing 1240, thereby wrapping the terminal block 1210.

[0171] A plate insertion slot 1241 can be formed on the inner side of the sensor housing 1240 for the shielding plate 1250 to be inserted. That is, the shielding plate 1250 can be inserted into the plate insertion slot 1241, thereby ensuring internal space for the wiring bar 1210, the magnetic field sensor 1230, and the housing cover 1260. In addition, the sensor housing 1240 can be made more compact.

[0172] The housing cover 1260 can be formed in a plate shape. The housing cover 1260 can be attached to or detached from the sensor housing 1240, thereby opening and closing the sensor housing 1240. The housing cover 1260 can be attached to both sides of the sensor housing 1240, thereby facing the magnetic field sensor 1230. The housing cover 1260 can be fixed to the terminal block 1210.

[0173] In a first embodiment, the sensor housing 1240 and the housing cover 1260 can be joined by hooks. Hook protrusions 1242 can be formed on both sides of the sensor housing 1240 to engage with the housing cover 1260.

[0174] The hook protrusion 1242 can form an inclined surface 1242a along the joining direction of the housing cover 1260. The two ends of the housing cover 1260 can contact the inclined surface 1242a while moving along the inclined surface 1242a, thereby being introduced into the interior of the sensor housing 1240. The two ends of the sensor housing 1240 can be elastically deformed by being pushed open to both sides by the housing cover 1260.

[0175] Furthermore, when the two sides of the outer cover 1260 pass the hook protrusion 1242, the pressure applied to the outer cover 1260 is released, and the outer cover 1260 returns to its original state, thereby allowing the side ends of the outer cover 1260 to engage with the hook protrusion 1242.

[0176] Handle protrusions 1261 can be formed on both sides of the housing cover 1260. The handle protrusions 1261 can contact and engage with both sides of the sensor housing 1240. When the administrator holds the two handle protrusions 1261 to apply pressure, the housing cover 1260 bends and elastically deforms, thereby allowing the housing cover 1260 to separate from the hook protrusions 1242.

[0177] like Figure 19 , Figure 21 (a) and Figure 21 As shown in (b), in the second embodiment, the sensor housing 1240' and the housing cover 1260' can be joined by sliding.

[0178] Sliding grooves 1243 can be formed along the vertical direction on both sides of the sensor housing 1240'. Engaging protrusions 1262 can be formed along the vertical direction on both sides of the housing cover 1260', thereby inserting into the sliding grooves 1243. The housing cover 1260' can be fixed to the terminal block 1210.

[0179] A handle protrusion 1263 may be formed on the side of the housing cover 1260'. The administrator can easily attach or detach the housing cover 1260' from the sensor housing 1240' by holding the handle protrusion 1263.

[0180] Supporting protrusions 1244 can be formed on the lower part of both sides of the sensor housing 1240', thereby contacting the lower end of the housing cover 1260'. The housing cover 1260' can contact the supporting protrusions 1244, thereby being stably supported.

[0181] Figure 22 (a) and Figure 22 (b) is a schematic cross-sectional view of the lifting part in the brush holder according to the second embodiment of the present invention, illustrating the state in which the guide pin is raised.

[0182] The brush holder according to the second embodiment of the present invention is constructed with the same structure as the brush holder according to the first embodiment, except for the lifting part 1900. Therefore, repeated descriptions related to the same structure are omitted.

[0183] like Figure 22 (a) and Figure 22As shown in (b), the brush holder may also include a lifting section 1900. The lifting section 1900 can raise or lower the guide pin 1120. The upper part of the guide pin 1120 may, unlike the first embodiment described above, extend through the upper side of the main body 1100 and the lower side of the control housing 1400.

[0184] When the length of the brush 1110 decreases, the distance between the slip ring 12 and the guide pin 1120 may also decrease. If this continues, the lower end of the guide pin 1120 and the slip ring 12 may come into contact, potentially causing component damage or a fire. Furthermore, the shorter the distance between the lower end of the guide pin 1120 and the slip ring 12, the more precisely the frictional heat between the brush 1110 and the slip ring 12 can be measured.

[0185] The control unit can drive the lifting unit 1900 based on the measurement value of the distance sensor, thereby selectively raising or lowering the guide pin 1120. Therefore, the distance between the lower end of the guide pin 1120 and the slip ring 12 can be stably maintained at a minimum, thereby reducing the possibility of component damage and further improving the reliability of temperature measurement.

[0186] The lifting unit 1900 may include a coupling ring 1910, a gear 1920, and a motor 1930. The upper part of the guide pin 1120 may be disposed inside the control unit housing 1400. The coupling ring 1910 may be disposed inside the control unit housing 1400, thereby being rotatably fixed.

[0187] Threads can be formed on the outer and inner circumferential surfaces of the engagement ring 1910. The engagement ring 1910 can be penetrated by the guide pin 1120, thereby engaging with the guide pin 1120 in a threaded manner.

[0188] Gear 1920 can mesh with teeth formed on the outer circumferential surface of engagement ring 1910. Motor 1930 can be an electric motor. The rotating shaft of motor 1930 can be fixed to gear 1920, thereby causing gear 1920 to rotate.

[0189] That is, the rotational force of the motor 1930 can be converted into linear motion by the coupling ring 1910, thereby causing the guide pin 1120 to rise or fall.

[0190] In the foregoing, one embodiment of the present invention has been described. However, those skilled in the art can make various modifications and alterations to the present invention by adding, changing, deleting, or supplementing constituent elements without departing from the spirit of the present invention as described in the claims. Such modifications and alterations should also be understood to be included within the scope of the present invention.

Claims

1. A brush holder, in, include: The main body has brushes arranged on the lower side; Guide pins, with their upper parts disposed in the main body and their lower parts disposed inside the brush; and A temperature sensor is mounted on the guide pin.

2. The brush holder according to claim 1, wherein, Also includes: The control unit transmits the measured value from the temperature sensor to the administrator's terminal.

3. The brush holder according to claim 1, wherein, The guide pin has a hollow section formed along the vertical direction. The temperature sensor is disposed in the hollow cavity.

4. The brush holder according to claim 1, wherein, A pin insertion hole is formed in the brush along the vertical direction, and the lower part of the guide pin is inserted into the pin insertion hole.

5. The brush holder according to claim 2, wherein, The temperature sensor includes: The temperature of the brush is measured at the junction; and The sensor cable is connected at its lower end to the joint.

6. The brush holder according to claim 5, wherein, Also includes: The control unit housing is disposed on the upper part of the main body; and A printed circuit board is disposed inside the housing of the control unit, on which the control unit is mounted, and connected to the upper end of the sensor cable.

7. The brush holder according to claim 1, wherein, Also includes: The lifting mechanism causes the guide pin to rise or fall.

8. The brush holder according to claim 7, wherein, The lifting unit includes: The connecting ring is penetrated by the guide pin and threadedly engaged with the guide pin. A gear that meshes with teeth formed on the outer peripheral surface of the engagement ring; and An electric motor is mounted on the gear to rotate the gear.

9. The brush holder according to claim 1, wherein, Also includes: The hook component is disposed on the side of the main body; and A fixing rod is used to apply pressure to the hook component, thereby fixing the hook component to or separating it from the brush.

10. The brush holder according to claim 9, wherein, Also includes: The handle is located on the upper part of the fixed rod.

11. The brush holder according to claim 9, wherein, A pressure protrusion is formed at the upper end of the hook component. A hook is formed at the lower end of the hook component. The fixing rod has a protruding insertion groove for the insertion of the pressure protrusion.

12. The brush holder according to claim 11, wherein, When the fixed rod rotates in the forward direction, the pressure protrusion is pulled out from the protrusion insertion slot, and at the same time the hook is separated from the brush.

13. The brush holder according to claim 11, wherein, When the fixed rod rotates in the reverse direction, the pressure protrusion is introduced into the protrusion insertion groove, and at the same time the hook is engaged with the brush.

14. A generator excitation current supply device, in, include: The rotor of the generator; A slip ring is passed through the rotor and fixed to the rotor; The busbar is connected by the collector ring; The brush is in contact with the slip ring; and According to claim 1, the brush holder is provided with the brush and is connected to the busbar.

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