363 results about "Electrical conduction" patented technology

A chuck (100) of a wafer holding device and a wafer holding device. The chuck comprises a chuck frame (110); a plurality of contact members (120), wherein the plurality of contact members (120) are evenly distributed on the chuck frame (110), each of the contact members (120) comprises a fixing portion (121), a connecting portion (122) and a contact portion (123), one end of the fixing portion (121) is connected to an upper end of the connecting portion (122), and a lower end of the connecting portion (122) is connected to the contact portion (123); and a limiting member (400) fixed to the chuck frame (110), wherein the limiting member (400) is used for limiting the connecting portion (122) of each of the contact members (120) so as to reduce the moment arm of the connecting portion (122). By means of providing the limiting member (400), the moment arm of the connecting portion (122) of each of the contact members (120) is reduced, so that the deformation of the connecting portion (122) is within an elastic limit thereof. After a wafer leaves the chuck, an applied external force is removed, so that the connecting portion (122) automatically returns to an original shape. When the next wafer enters the wafer holding device for electroplating, the connecting portion (122) has returned to the original shape and can come into uniform contact with the wafer, thereby ensuring uniform electrical conduction and improving process quality.

The invention belongs to the technical field of cable installation devices, and particularly relates to an aerial cable insulation installation column which comprises a rectangular column, a clamping device and a stretching adjusting device, the clamping device is arranged in the middle of the rectangular column, and the stretching adjusting device is installed at the top of the clamping device; the clamping device comprises an installation platform, a fixed clamp and a movable clamp, the fixed clamp and the installation platform are integrally formed, the fixed clamp extends downwards, the movable clamp is inserted into the installation platform and located above the fixed clamp, clamping grooves are formed in the opposite sides of the fixed clamp and the movable clamp, and the fixed clamp and the movable clamp form a cable clamp. A limiting buckle is arranged on one side, away from the rectangular column, of the cable clamp; according to the scheme, the cable installation equipment which is small in size and convenient to rapidly install is provided for cable installation requirements in special environments such as pits, tunnels and mine holes; multiple insulation barriers are adopted, an electric leakage conduction path is effectively blocked, the excellent insulation performance can still be kept even in a humid and dusty environment, and the electric shock risk is greatly reduced.

A power semiconductor device includes a semiconductor structure comprising an active region, and a plurality of stress relief trenches in the semiconductor structure laterally between the active region and at least one edge of the semiconductor structure. The stress relief trenches respectively comprise opposing sidewalls and a dielectric material and / or a semiconductor material therebetween, and do not contribute to electrical conduction between first and second terminals of the power semiconductor device. Related devices and fabrication methods are also discussed.

The utility model relates to the field of sensor packaging, in particular to an embedded image sensor packaging structure which comprises a substrate, an annular heat conduction groove and a heat dissipation assembly, heat is efficiently collected through a heat dissipation copper sheet, and heat is efficiently conducted through sintered silver paste. Heat absorbed by the heat dissipation copper sheet can be quickly transmitted to the vertical heat conduction through holes in the substrates, so that the heat is efficiently transmitted between the substrates, the heat dissipation path is expanded, the heat dissipation efficiency is improved, the electrical conduction between the heat dissipation copper sheet and the vertical heat conduction through holes is ensured, the electrical performance of the whole packaging structure is more stable and reliable, and the service life of the packaging structure is prolonged. The image sensor is simple in structure and convenient to use, signal interference and transmission loss are reduced, the quality and stability of output signals of the sensor are guaranteed, the trapezoidal waterproof dam is formed at the edge of the double-layer stepped infrared optical filter, the waterproof capacity can be further enhanced, water vapor is prevented from entering the image sensor from the edge of the optical filter, and it is guaranteed that the image sensor can work normally in a humid environment.

A neurostimulator implant is provided that includes a circuitry unit having first and second ends, a conducting side, and an opposing side. First and second electrodes are disposed on an outer surface of the circuitry unit so as to circumscribe the circuitry unit. Circuitry is disposed within the circuitry unit. An insulating member is disposed on the opposing side of the circuitry unit such that, on the opposing side, each electrode is covered by the insulating member by being sandwiched between a first side of the insulating member and the circuitry unit, such that the insulating member inhibits electrical conduction from the electrodes into tissue of a subject. A second side of the insulating member, opposite the first side, defines a generally flat side of the implant facing away from the first and the second electrodes of the circuitry unit. Other embodiments are also described.

The application discloses a lighting device, characterized in that comprising: a lamp shell and a lamp head, the lamp shell is connected with the lamp head and forms a closed space; at least one light emitting diode filament, the light emitting diode filament is arranged in the closed space; a stem, the stem is connected to the lamp head and is in electrical conduction with the light emitting diode filament; the light emitting diode filament comprises: a chip strip structure; a light conversion unit wrapping the chip strip structure; and electrodes respectively located at both ends of the length direction of the chip strip structure and electrically connected with the chip strip structure; wherein, at least part of the electrodes is wrapped in the light conversion unit; the chip strip structure comprises a substrate, the substrate comprises a first end and a second end away from the first end, and a deposition section between the first and second ends; the deposition section comprises a plurality of deposition units, the deposition units are provided with a linking layer; and a conductor layer for electrically connecting each deposition unit.

A signal supply unit (11) in a root canal treatment system (1) can supply a wetness detection signal for detecting the wetness of a root apex (2a1) to a root canal electrode (31) and a counter electrode (32). The root canal treatment system (1) includes: an operation unit (13) that is operated to switch between a state in which the signal supply unit (11) supplies an apical position detection signal and a state in which the signal supply unit (11) supplies the wetness detection signal; and a display unit (14) and a sound output unit (15) as notification units for notifying the electrical conduction state of the root canal electrode (31) and the counter electrode (32) which have been supplied with the wetness detection signal.

The embodiment of the invention provides an antenna system and terminal equipment, the antenna system is used for the terminal equipment, the antenna system comprises a first radiator, a second radiator, a first feed structure, a second feed structure and an adjusting unit, and a gap is formed between the first radiator and the second radiator. The adjusting unit is connected between the first radiating body and the second radiating body, the adjusting unit has an on state and an off state, and the adjusting unit is used for realizing electric conduction between the first radiating body and the second radiating body in the on state. When the adjusting unit is in a conducting state, the first feed structure receives feed and excites the first radiator and the second radiator to generate third resonance, or the second feed structure receives feed and excites the first radiator and the second radiator to generate fourth resonance. According to the invention, the adjustment unit is conducted so that different radiators in the antenna system participate in radiation together, the radiation performance of the antenna system can be optimized, and the communication requirement of the terminal equipment is met.

The invention provides an electrostatic interference elimination method for an air negative ion product. The air negative ion product comprises a negative high voltage electrode and a relative electrode. Particularly, the negative air ion product is provided with a static electricity elimination mechanism which is characterized in that a negative high-voltage electrode and an opposite electrode are electrically connected through an electric conduction medium, so that high voltage formed between the negative high-voltage electrode and the opposite electrode is applied to the electric conduction medium, and negative charges are transmitted to the opposite electrode along the electric conduction medium to be neutralized with positive charges; and static elimination is realized. Furthermore, the obvious reduction of the negative ion concentration is taken as the basis for executing the static elimination mechanism, and the execution is ended after 3-10 seconds. Or the obvious reduction of the working current of the negative ion generator circuit is taken as the basis for executing the static elimination mechanism, and the execution is ended after 3-10 seconds. The problem of electrostatic interference can be effectively solved, the air negative ion product can efficiently, stably and continuously generate high-concentration air negative ions, and a positive health effect is generated for a product user.

A splicing device and a lamp, the splicing device comprises a male connector, a male side conductive assembly, a female connector and a female side conductive assembly; the male side conductive assembly comprises a first conductive piece and a second conductive piece connected with the male connector; the female connector is detachably connected with the male connector; the female side conductive assembly comprises a third conductive piece connected with the female connector and a fourth conductive piece connected with the female connector; the third conductive piece is used for docking with the first conductive piece, and the fourth conductive piece is used for docking with the second conductive piece to transmit current; one of the third conductive piece and the first conductive piece is elastic; one of the fourth conductive piece and the second conductive piece is elastic, through the elastic contraction of one side of the third conductive piece and the first conductive piece and the elastic contraction of one side of the fourth conductive piece and the second conductive piece, good abutting contact can be maintained when there is vibration in the installation site or the long lamp tube is bent, the electrical conduction effect is maintained well, and the lamp tube can be normally illuminated.

The invention belongs to the technical field of image processing, and discloses an automobile wire harness terminal evaluation system and method based on static image AI analysis. Comprising the steps that images of automobile wire harness terminals are acquired, and the images of the automobile wire harness terminals comprise a first automobile wire harness terminal image and a second automobile wire harness terminal image; detecting a contact pin of the automobile wire harness terminal according to the first automobile wire harness terminal image, and judging whether the contact pin of the automobile wire harness terminal is deformed or not; detecting the crimping quality of the automobile wire harness terminal of which the contact pin is not deformed, and judging whether the crimping quality of the automobile wire harness terminal is qualified or not; performing electrical conduction detection on the automobile wire harness terminal with qualified crimping quality, judging whether the electrical conduction detection of the automobile wire harness terminal is qualified or not, if the electrical conduction detection of the automobile wire harness terminal is qualified, determining that the whole automobile wire harness terminal is qualified, and if the electrical conduction detection of the automobile wire harness terminal is unqualified, determining that the whole automobile wire harness terminal is unqualified; and the evaluation accuracy is further improved.

An apparatus (100) for treating a portion of a surface of at least one electrically conductive layer structure (210) of a stack (201) of a printed circuit board or the like (200) is described, where the apparatus (100) comprises a surface treatment unit (120), the surface treatment unit is configured to change at least a portion of the exposed surface of the at least one electrically conductive layer structure (210) along a predetermined multi-profile shape portion (250). Furthermore, a printed circuit board or the like (200) and a method for treating a surface are described.

The utility model relates to the technical field of curtain machines, and discloses a conductive strip connecting structure of a curtain machine, which comprises a guide rail section and a conductive connecting piece, and a conductive strip section is arranged in the guide rail section; the conductive connecting piece is arranged between the two guide rail sections, one part of the conductive connecting piece is in extrusion fit with the conductive strip section in one guide rail section, and the other part of the conductive connecting piece is in extrusion fit with the conductive strip section in the other guide rail section, so that the conductive strip sections in the two guide rail sections form electrical conduction connection. The conductive connecting piece and the conductive strip sections are in extrusion fit, so that the friction force between the conductive connecting piece and the conductive strip sections is increased, the conductive connecting piece and the conductive strip sections are effectively connected and are not easy to separate, and stable electric conduction between the two conductive strip sections is ensured.

To provide a projected capacitive touch panel button structure disposed on a touch screen.SOLUTION: A projected capacitive touch panel button structure comprises: a button body 20 disposed on a touch screen; a touch capacitive sheet 10 disposed on the touch screen and located inside the button body 20; a conductive rubber 30 disposed in the button body 20 and including a contact portion 31 that can come into contact with the touch capacitive sheet 10; and a button cap 40 including a connecting body 41 disposed above the conductive rubber 30 and a cover body 42 protruding outward from the button body 20. When the button cap 40 is pressed, the contact portion 31 comes into contact with the touch capacitive sheet 10, and the conductive rubber 30 and the touch capacitive sheet 10 become conductive, causing the touch screen A to generate an input signal.SELECTED DRAWING: Figure 2

To provide a technique capable of holding energization in an electric motor with a simple configuration even after a manual switch for a reciprocating tool is turned off.SOLUTION: A reciprocating tool includes a reciprocating member, an electric motor, a transmission device, a drive circuit, a first manual switch, a switch element and a control circuit. A first contact point of the first manual switch is connected to a power supply, and a second contact point of the first manual switch is connected to the drive circuit. The first manual switch in its on state connects the first contact point to the second contact point. The switch element (i) is turned on when it receives an electric signal, and (ii) establishes electrical continuity between the first contact point and the second contact point in its on state. In response to at least the first manual switch being turned on, the control circuit continues to output the electric signal to the switch element until the drive of the electric motor is stopped.SELECTED DRAWING: Figure 6

The utility model relates to packaging cotton with an antistatic function, which comprises a pearl cotton body, the pearl cotton body comprises a pearl cotton base layer, an electrostatic conduction layer, a pearl cotton filling layer, an antibacterial waterproof layer, an antistatic surface layer and a wear-resistant bottom layer, the electrostatic conduction layer is arranged on the surface of the pearl cotton base layer, and the electrostatic conduction layer is arranged on the surface of the pearl cotton filling layer. The pearl wool filling layer is arranged on the surface of the static conducting layer, the antibacterial waterproof layer is arranged on the surface of the pearl wool filling layer, the anti-static surface layer is arranged on the surface of the antibacterial waterproof layer, and the wear-resistant bottom layer is arranged on the bottom surface of the pearl wool base layer. The static electricity problem can be effectively reduced, static electricity is guided to the ground, static electricity accumulation is avoided, stable conductive performance is kept in the long-term use process, performance reduction caused by environment change or use abrasion is reduced, and harm of the static electricity to a human body and electronic equipment is avoided.

A variable resistance network includes a plurality of resistance modules electrically connected in series along an electrical conduction path between an input electrical node and an output electrical node. The variable resistance network includes a plurality of relay modules electrically connected to control activation and deactivation of respective ones of the plurality of resistance modules. The variable resistance network includes a controller electrically connected to each of the plurality of relay modules. The controller is configured to transmit electrical control signals to each of the plurality of relay modules to independently control operation of each of the plurality of relay modules and correspondingly control activation and deactivation of the plurality of resistance modules. The variable resistance network is implementable for controlling radiofrequency signal return pathways from one or more electrodes within a plasma processing chamber.

The application provides a test method, device, storage medium and program product of an electrothermal atomization element. A glass container is used to form a test cavity for accommodating the electrothermal atomization element. A container sealing cover is sealingly assembled at an outlet of the glass container. An electrical through part is sealingly and penetratingly arranged on the container sealing cover, and is used to realize electrical conduction between the inside of the test cavity and an external control part. The bottom of the glass container accommodates test oil. One end of an oil guide material is immersed in the test oil, and the other end of the oil guide material is in physical contact with a heating part of the electrothermal atomization element. The external control part is electrically connected with one end of the electrical through part outside the glass container through a wire, and is used to output a driving electric signal to the electrothermal atomization element. The electrothermal atomization element is accommodated in the test cavity formed by the glass container. An electrode lead of the electrothermal atomization element is electrically connected with the other end of the electrical through part inside the glass container. When the electrothermal atomization element is powered on, the test oil delivered by the oil guide material is heated to generate an oil mist.

This invention provides a composite switch with a power-off protection structure, belonging to the field of switch technology. It includes a housing, a control panel, a power-connecting component, an adsorption component, and a repulsion component. The housing is mounted on a wall, and the control panel is rotatably mounted on the side of the housing away from the wall. The power-connecting component is disposed inside the housing. When the control panel rotates in a first direction, the power-connecting component enables electrical conduction to the appliance; when the control panel rotates in a second direction, the power-connecting component enables power disconnection to the appliance. The adsorption component is fixedly disposed on the inner wall of the housing, and the repulsion component is disposed on one side of the adsorption component and slides against the inner wall of the housing. Compared to existing technologies, this invention automatically disconnects the connection between the appliance and the switch during a power outage, preventing damage to the appliance due to instantaneous high voltage upon subsequent power restoration, thus achieving power-off protection for the appliance.

The utility model belongs to the technical field of explosion-proof electrostatic grounding pliers, and particularly relates to an explosion-proof electrostatic grounding pliers capable of safely releasing static electricity of a human body, which comprises a handle, a guide frame is fixedly connected to the outer side of the handle, and two uniformly distributed moving plates are slidably sleeved to the outer side of the vertical part of the guide frame. Each movable plate is in sliding connection with the handle, the movable plates and the guide frame are jointly provided with a wire clamping mechanism, the movable plate on the lower side is fixedly connected with a fixed block, the inner wall of the fixed block is rotationally connected with a supporting shaft, the outer side of the supporting shaft is fixedly sleeved with a static conduction piece, and the static conduction piece is rotationally connected with the fixed block. By pushing the static conduction sheet to deflect, the static conduction sheet is driven by the supporting shaft to be in a stable state under the structures of the elastic clamping ball, the clamping hole and the like, so that the static conduction sheet is in contact with the ground, a static conduction loop is formed for a human body, and static electricity of the human body is safely released.

The invention discloses a rotating device and a keyboard protection shell assembly. The rotating device comprises a first component, a second component and a positioning device, the first component is rotatably connected with the second component; a plurality of grooves and bulges are alternately arranged on the second component around the circumference of the first rotating axis; the positioning device comprises a positioning piece and an elastic reset element; the positioning piece is provided with a positioning end used for being embedded in the groove, and the positioning piece is movably matched with the first component. The elastic reset element is arranged between the positioning piece and the first component; the first component is provided with a first electrical connection module, and the second component is provided with a second electrical connection module. According to the invention, stable locking can be ensured, displacement is avoided, electrical conduction is realized through sliding contact of the first conductive part and the second conductive part, the problem of wire winding is avoided, the use reliability can be improved, and the user experience is improved.

The invention discloses a side edge series photovoltaic module and a preparation method thereof, the side edge series photovoltaic module comprises a first electrode layer, a second electrode layer and a photoelectric conversion layer located between the first electrode layer and the second electrode layer, the first electrode layer comprises a plurality of first electrode monomers which are mutually insulated, and the second electrode layer comprises a plurality of second electrode monomers which are mutually insulated; the first electrode single body comprises a first photoelectric conversion area which is in contact with and covered by the photoelectric conversion layer and first side edge series structure areas which are located on the two sides of the first photoelectric conversion area, and the second electrode layer comprises a plurality of second electrode single bodies which are mutually insulated; the second electrode single body comprises a second photoelectric conversion area covered by the photoelectric conversion layer in a contact mode and second side edge series connection structure areas located on the two sides of the second photoelectric conversion area. Through direct contact between the first side edge series structure region and the second side edge series structure region, series connection between the sub-cells is formed, laser etching is not needed to penetrate through the photoelectric conversion layer, the contact stability of the upper electrode and the lower electrode and the electrical conduction efficiency are greatly improved, and the performance of the photovoltaic cell assembly is improved.

The invention provides a semiconductor structure forming method and a semiconductor structure. The forming method comprises the following steps: forming a substrate, and forming a first ion implantation region on the surface of the substrate; and forming a first epitaxial layer on the substrate, and forming a second ion implantation region on the surface of the first epitaxial layer. A second epitaxial layer is formed on the first epitaxial layer. Forming a second contact hole, enabling the second contact hole to penetrate through the second epitaxial layer along the stacking direction of the second epitaxial layer so as to expose the second ion implantation region, and forming a first contact hole, enabling the first contact hole to penetrate through the second epitaxial layer and the first epitaxial layer along the stacking direction of the second epitaxial layer so as to expose the first ion implantation region. A conductive interconnection layer is formed, and the conductive interconnection layer is located in the first contact hole and the second contact hole and connected with the first ion implantation region and the second ion implantation region, so that the substrate and the first epitaxial layer are electrically conducted through the conductive interconnection layer. The problem that the contact resistance is high when the deep groove contact hole is optimized can be solved.

It is aimed to provide a card edge connector capable of improving electrical conduction between a terminal and a board. A card edge connector (1) is provided with a housing (12) and a terminal fitting (13) including a base portion (13A) to be fixed to the housing (12), a contact portion (13D) to be brought into electrical contact with a circuit board (62) assembled with the housing (12) and a spring portion (13C) provided between the base portion (13A) and the contact portion (13D) for displaceably supporting the contact portion (13D).

The invention discloses an electric connector and an electric connector combination, the electric connector comprises a sub-circuit board and an elastic grounding piece, the sub-circuit board comprises an insulating layer, a plurality of through holes penetrating through the insulating layer along the vertical direction, a plurality of metal coatings respectively located on the hole walls of the plurality of through holes, and an upper metal foil layer located on the upper surface of the insulating layer, the elastic grounding piece is in contact with the upper metal foil layer, the insulating layer and the upper metal foil layer are easy to form through a circuit board forming process, after the insulating layer and the upper metal foil layer are formed, a metal coating is plated on the hole wall of the through hole, the upper metal foil layer is located on the upper surface of the insulating layer, and the upper metal foil layer is uniform in thickness, not prone to cracking and better in flatness. The sub-circuit board is simple in structure and high in reliability, good electrical conduction with the metal coating can be achieved, a grounding loop is added, shielding of the signal terminal can be further improved, and meanwhile, compared with a common insulating body, the insulating layer of the formed sub-circuit board is smaller in thermal expansion coefficient and smaller in size variation under heating.

The invention discloses a device and method for measuring a relative permeability curve of a soil body, the device comprises a cutting ring, a sleeve, a stainless steel electrode, a water delivery module, a vacuum drying system and a resistivity acquisition control module, the resistivity is monitored in real time through an electrode hole, and a sealing structure ensures that the system is stable. The method is based on an unsaturated seepage and electrical conduction theory and comprises the following steps: firstly drying a soil sample, then injecting water, collecting resistivity data, inverting a soil-water characteristic curve through a resistivity-moisture content-matric suction relation model, calculating a permeability coefficient in combination with a Darcy law, and fitting to obtain a permeability curve. The device and the method overcome the limitation that a traditional experiment is tedious in operation and prone to interference, have the advantages of being portable, easy and convenient to operate, high in automation degree, suitable for field measurement and the like, and can achieve efficient and accurate measurement of the permeability characteristic of the unsaturated soil body.

The invention relates to the technical field of printed circuit board connector testing, in particular to a nondestructive testing probe for a coaxial printed circuit board connector. The nondestructive testing probe comprises an outer conductor assembly, a grounding contact assembly, a central conductor assembly and an insulating medium assembly. Wherein the outer conductor assembly comprises a first main body piece and a second main body piece, one end of the second main body piece is embedded into the first main body piece, the other end of the second main body piece is provided with a first accommodating groove and a second accommodating groove, the grounding contact assembly is located in the first accommodating groove, and the central conductor assembly and the insulating medium assembly are located in the outer conductor assembly. During testing, the grounding welding pin and the central pin welding pin of the coaxial PCB connector to be tested are plugged with the grounding contact assembly and the central conductor assembly through the first accommodating groove and the second accommodating groove, so that non-destructive electric conduction of the grounding contact assembly and the central conductor assembly is realized, performance testing can be accurately and reliably carried out on the PCB coaxial connector, and an actual use scene is reproduced.

The invention relates to the technical field of photovoltaic curtain walls, in particular to a photovoltaic curtain wall electrical cable installation structure, which is applied to a photovoltaic curtain wall and comprises a photovoltaic glass combination, a photovoltaic curtain wall electrical cable installation structure and a photovoltaic curtain wall electrical cable installation structure, the decorative cover is arranged in a longitudinal extending manner and covers the pressing block to form a wiring channel; the junction boxes are arranged on the two transverse side faces of the photovoltaic glass plate respectively, the junction boxes are provided with leading-out wires used for electrical conduction, and the leading-out wires are arranged in the wiring channels; the photovoltaic direct current cable is longitudinally arranged in the wiring channel; the photovoltaic glass combination comprises a plurality of photovoltaic glass plates, leading-out wires among the photovoltaic glass plates are sequentially connected in series, and the leading-out wires which are not connected in series are connected with photovoltaic direct-current cables in a one-to-one correspondence manner; or, the photovoltaic glass combination comprises a photovoltaic glass plate, and the outgoing lines of the photovoltaic glass combination are connected with the lower ends of the photovoltaic direct current cables in a one-to-one correspondence mode. The problem that a traditional photovoltaic curtain wall is inconvenient to maintain is solved.

To provide an inspection device, a determination device, a method for determination, and a program that facilitate detection of the presence of a terminal fitting in the connector in a state of insufficient engagement between the terminal fitting and the connector upon performing an inspection other than an inspection at a location where the terminal fitting is present in the connector.SOLUTION: The inspection device includes: a compression coil spring; a pushing unit for pressing the compression coil spring in a pressing direction; an inspection probe for moving together with the compression coil spring and for pressing a terminal fitting inserted into a connector; a contact sensor for detecting contact between the pushing unit and the compression coil spring; a first conductive member with conductivity, having the inspection probe inserted therethrough; and a second conductive member with conductivity, facing the first conductive member. The first conductive member and the second conductive member establish electrical conduction while maintaining the contact at the time of dropout of the terminal fitting, and the first conductive member and the second conductive member establish electrical conduction in a state without the contact at the time of absence of the terminal fitting.SELECTED DRAWING: Figure 22

The invention provides a wind turbine comprising a lightning protection system for providing an electrically conductive path suitable for conducting lightning from the rotor to an electrical ground. The lightning protection system comprises a shroud electrically coupled to a wind turbine bearing housing and a front end of a wind turbine hub and / or main shaft. The shroud forms part of the electrically conductive path to electrically couple the wind turbine rotor to the bearing housing via a short circuit path that bypasses the bearing arrangement.