968results about "Association with grounding devices" patented technology

The invention relates to the technical field of electric corrosion prevention of motors, and discloses an electric corrosion prevention mechanism of a motor bearing, which comprises a motor, the motor is provided with a shell and a bottom cover which are matched with each other, a first bearing cover is fixed on the outer side of the shell, and a second bearing cover is integrally formed on the outer side of the bottom cover. Matched bearings are limited in the first bearing cover and the second bearing cover; a conduction mechanism is arranged between the shell and the bottom cover and is used for reducing the risk that the bearing matched with the bearing is electrically corroded; the outer sides of the two matching bearings are provided with conduction matching parts, and the conduction matching parts are internally provided with lubricating oil. Lubricating oil at the lower end of the rectangular block enters the annular groove to be in contact with the matched bearing through rotation of the rotating shaft, current is prevented from passing through a bearing raceway, and shaft voltage is prevented from puncturing a lubricating film to cause discharge; the motor vibrates to replace the lubricating oil in the annular groove, so that a continuously updated lubricating film is formed on the surface of the rotating element, and the insulation performance is prevented from being reduced.

The invention relates to the technical field of explosion-proof permanent magnet motors, and discloses a low-voltage explosion-proof dust explosion-proof permanent magnet motor which comprises an explosion-proof shell, a front end cover and a rear end cover, the front end cover and the rear end cover are arranged on the two sides of the explosion-proof shell respectively, and the front end cover and the rear end cover are both attached to the explosion-proof shell. And a dustproof heat dissipation mechanism is arranged on the rear end cover. Through the design of a dustproof heat dissipation mechanism, a connecting rod drives fan blades and a U-shaped plate to rotate, after the fan blades rotate, external airflow is sucked from an air inlet hole to achieve the purpose of air cooling, before the airflow enters, a filter screen filters dust, a cleaning layer cleans away dust on the filter screen when passing through the filter screen, and when passing through a scraper blade, the dust on the filter screen is cleaned away by the cleaning layer; the scraper blade scrapes off dust on the cleaning layer, air-cooled gas is finally discharged through the exhaust hopper, the scraped-off dust can be quickly blown away, the situation that dust explosion is possibly caused by dust gathering is avoided, the application range is wider, and safety is higher.

In one aspect, an in-wheel drive assembly is provided that includes a stator configured to form a non-rotatable connection with a spindle of a vehicle and be positioned outboard of the spindle. The in-wheel drive assembly includes a stator retainer configured to extend in an interior of the spindle and inhibit movement of the stator in an outboard direction relative to the spindle. The in-wheel drive assembly further includes a rotor rotatably supported by the stator, an output housing to be connected to a wheel hub, and a planetary gear assembly operatively connecting the rotor and the output housing. The planetary gear assembly is configured to cause rotation of the output housing and wheel hub connected thereto in response to rotation of the rotor.

A position sensor of a motor includes: a housing in which a hollow is formed and an accommodation space is formed as surrounding the hollow; a ground ring formed through an inner circumferential surface of the housing; a first PCB installed in the accommodation space and formed with a first circuit part; an induction unit facing the first PCB and rotates; a connecting bushing embedded in the housing and electrically connected to the ground by a fastening member; and a relay unit installed in the accommodation space and relaying the ground ring and the connection bushing. The ground ring is formed with a body formed through the inner circumferential surface, a contact part formed on one side of the body and disposed of in the hollow, and a first connection part extending from the other side of the body and contacting the relay unit.

A dynamo-electric rotary machine includes a rotor defining an axis, a stator, and a can designed for arrangement in an air gap between the rotor and the stator in order to seal the stator and the rotor in relation to each other. The can has at least one section of average electrical conductivity in a range from 1 S / m to 10000 S / m in an axial and / or a tangential direction. The can is electrically conductively incorporated in an earthing system of the dynamo-electric machine.

The invention provides a conductive structure which can save space and can restrain reduction of conductive performance in a use state. A conductive structure (1) is provided with a holding member (2) that is a conductive member that is annular about an axis (x), and a conductive member (3) that is an annular member about the axis (x). The electrically conductive component (3) has at least one radially extending gap (10) and at least one electrically conductive body (20) extending about an axis (x). The conductive member (3) is held by the holding member (2). The conductor (20) has a pair of end portions (20a, 20b) in the direction around the axis (x). The gap (10) is connected to the ends (20a, 20b) of the conductor (20).

The invention discloses a grounding device for a driving shaft of a motor. The grounding device comprises a motor shell and the driving shaft, the rubber pad is arranged at the top of the motor shell; the grounding assembly is arranged at the top of the rubber pad and comprises a conductive part, a pressurizing part is arranged in the conductive part, a second dismounting part is arranged in the conductive part, when the driving shaft rotates, the conductive outer ring and the conductive inner ring are driven to rotate, and the conductive block is limited by the L-shaped conductive plate and the conductive rod and cannot rotate; a conductive block is in contact with a conductive inner ring to form closing of a conductive circuit, meanwhile, a first spring pulls a conductive piece leftwards, and then a conductive rod and an L-shaped conductive plate are pulled, so that the conductive block makes contact with the inner wall of the conductive inner ring all the time, and even if abrasion is generated between the conductive block and the conductive inner ring, the conductive circuit is closed. And the conductive block can still move in a first spring pulling mode, and it is guaranteed that the conductive block makes contact with the inner wall of the conductive inner ring all the time.

An electric machine comprises a stator, a rotor, an air gap between the stator and rotor (spacing them apart), and a shielding structure to reduce capacitive coupling between the stator and rotor. The shielding structure is coupled to a reference potential. Located within the air gap, the shielding structure comprises multiple conductors. Each conductor has a first section, the longitudinal extents of which extend transversely to the magnetic flux direction of the electric machine. Each conductor also has a second section, the longitudinal extents of which extend in a comb-like or meandering pattern, interlocked transversely to the magnetic flux direction and in a direction different from the longitudinal extents of the first sections.

The invention relates to a combined conducting ring and a use method thereof.The conducting ring is mainly composed of an upper conducting strip, a lower conducting strip and a middle supporting spring, in the installation process, the conducting ring is assembled in a corresponding groove position in a motor shaft, after installation is completed, due to the effect of the supporting spring, the inner peripheries of the upper conducting strip and the lower conducting strip are opened, and the inner peripheries of the upper conducting strip and the lower conducting strip are sealed. Therefore, the side face of the conducting strip is tightly attached to the motor shaft, the periphery of the conducting strip is tightly contacted with the shell, and a stable conducting path is formed between the motor shaft and the shell. According to the motor, bearing voltage is formed on the inner ring and the outer ring of a bearing due to the existence of common-mode voltage, in addition, common-mode current generated by the common-mode voltage also flows through the motor bearing, so that the problems of electric discharge, pits, spots and the like of the bearing are caused at the motor bearing, and an effective solution is provided aiming at the conditions. Through the combined conducting ring, the bearing voltage can be effectively conducted to the shell, so that the bearing electrocorrosion is avoided, and the normal operation and the service life of the motor are ensured.

Provided is a conductive ring capable of suppressing a decrease in the tightening force with respect to the shaft. 【Solution means】 The conductive ring 1 includes an annular conductive holding member 10, a conductive member 20 having conductivity extending around the axis x, and a spring member 30 having conductivity extending around the axis x. The conductive member 20 has a plurality of conductive pieces 21 arranged in the circumferential direction at the inner peripheral end portion 20a. The spring member 30 has a plurality of spring pieces 31 arranged in the circumferential direction at the inner peripheral end portion 30a. Each of the plurality of spring pieces 31 of the spring member 30 is elastically deformable along the axis x and contacts the plurality of conductive pieces 21 of the conductive member 20. The holding member 10 holds the conductive member 20 and the spring member 30 side by side in the axis x direction.

The objective of the present disclosure is to realize downsizing of the bus-bar holder, and then to downsize an electric rotating machine apparatus and an electric power steering apparatus. In a first protruding portion of the bus-bar holder, there are provided a columnar portion, two or more first ribs that are provided on an outer circumferential surface of the columnar portion in such a way as to be parallel with a center axis of the columnar portion and in such a way as to be spaced apart from one another, and two or more second ribs; the first rib makes contact with an inner circumference surface of a first through hole of the control circuit board; the second rib makes contact with an inner circumference surface of a second through hole of the bus bar.

The utility model relates to a shaft grounding ring convenient to install, which comprises an annular shell, an upper support plate, a lower support plate and a conductive fiber bundle, one end of the conductive fiber bundle is provided with an installation piece, the lower support plate is provided with at least two grooves, the installation piece is arranged in the grooves, the upper support plate is arranged on the upper side of the lower support plate, and the lower support plate is arranged on the lower side of the annular shell. The upper supporting plate and the lower supporting plate are both arranged in the annular shell, the annular shell is provided with a fixing part protruding inwards, and the fixing part abuts against the upper supporting plate. The problems that an existing carbon fiber grounding ring is inconvenient to install and not firm in structure are solved.

The invention provides a dual-motor power assembly capable of preventing electric corrosion of bearings and an electric vehicle. The power assembly comprises two driving motors which are arranged adjacently. A shell of the power assembly comprises a middle partition plate, and each of two opposite end faces of the middle partition plate comprises a bearing groove and an oil guide structure. And each bearing groove is used for fixing a motor shaft of a driving motor through a motor bearing. The two ends of each oil guide structure are used for being fixedly connected with the groove bottom of one bearing groove and extending into a shaft hole of one motor shaft in the axial direction of the power assembly to convey cooling liquid or lubricating oil correspondingly. And a gap is formed between the outer peripheral surface of each oil guide structure and the inner peripheral surface of the shaft hole of one motor shaft and is used for accommodating one annular conductive structure. And each conductive structure is used for electrically connecting one motor shaft and one oil guide structure. According to the power assembly, the shaft current is conducted to the shell to be grounded through the structure that the middle partition plate supplies oil to the shaft holes of the motor shafts on the two sides so that the motor bearings can be protected.

A power supply system can include an electrical power source and a power converter connectable to a load. The electrical power source can provide a first DC voltage with a first potential difference (VH) between a first DC potential output and a second DC potential output, and a third DC potential output having a potential between the potential at the first DC potential output and the potential at the second DC potential output. The power converter can provide a second voltage with a second potential difference (VL) between a first potential output (V+) and a second potential output (V−). The second potential difference (VL) can be less than the first potential difference (VH). The power converter can electrically isolate the first DC voltage from the second voltage, and the second potential output (V−) can be connected to the third DC potential output using a first connection including an impedance.

A motor system includes: a stator connected to a case of a motor; main bearings connected to the case; a main shaft rotating on the main bearings; a rotor mounted on the main shaft and rotating relative to the stator; and at least one of a magnetic flux reducing circuit element and a conductive rolling-element device disposed inward of the main bearings and closer to the stator and the rotor than the main bearings and reducing flow of bearing current through the main bearings.

A contact unit (1) is provided for contacting a shaft (2) of an electric machine (10) having a housing (3). The contact unit (1) comprises an elongated, metallic or non-metallic base body (5) having a bore (7) and designed for insertion into a holder (4) of the housing (3), wherein the longitudinal axis (A5) of the base body (5) coincides with the central axis of the bore (7). A conductor strip (6) is drawn through the bore (7) such that contact sections (8, 9, 11), namely at least one housing-side contact section (8, 9) and one shaft-side contact section (11), are formed by the conductor strip (6) on both sides of the bore (7), which project beyond the base body (5) in its longitudinal direction.

The invention discloses a motor, a water pump and a vehicle, a stator assembly comprises a stator iron core, an insulation framework and a coil winding, the insulation framework is arranged on the stator iron core, and the coil winding is wound on the insulation framework; the plurality of connector terminals are arranged on the end face of the insulating framework in the axial direction of the stator core, each connector terminal is provided with an external connecting end, at least part of the connector terminals are wiring terminals, and the wiring terminals are electrically connected with the coil winding; the casing comprises a first part and a second part which are integrally formed, the first part wraps the stator assembly, the second part wraps the plurality of connector terminals and defines a plug-in groove, and the external connecting end is located in the plug-in groove. According to the motor provided by the invention, the coil winding can be directly and electrically connected with the external application end through the wiring terminal, so that the structure of the motor is simpler, the shell of the stator assembly and the shell of the connector are integrally formed, the assembly procedures of the motor are reduced, the assembly cost is reduced, and the production efficiency is improved.

Provided is a conductive ring capable of suppressing a decrease in the tightening force with respect to the shaft. 【Solution means】The conductive ring forms a conductive path between a rotating shaft and a hole through which the shaft is inserted. The conductive ring 1 includes an annular holding member 10 having conductivity around the axis x, a conductive member 20 having conductivity extending around the axis x, and a spring member 30 extending around the axis x. The conductive member 20 is adapted to contact the shaft and the hole, and in cooperation with the spring member 30, generates a tightening force with respect to the shaft. When the sliding distance D of the shaft with respect to the conductive member 20 reaches a predetermined required sliding distance D1, the impedance Z between the shaft and the hole of the conductive member 20 becomes an impedance Z1 of a predetermined value.

To provide a conductive ring that can suppress a decrease in the tightening force with respect to the shaft. 【Solution means】The conductive ring 1 includes a holding member 10 having annular conductivity around the axis x, a conductive member 20 having conductivity extending around the axis x, and a spring member 30 extending around the axis x. The conductive member 20 is adapted to contact the shaft, and in cooperation with the spring member 30, generates a tightening force with respect to the shaft. When the sliding distance D of the shaft with respect to the conductive member 20 reaches a predetermined required sliding distance D1, the contact tightening margin δ becomes a tightening margin δ1 of a predetermined value.

The invention relates to a shaft grounding device for deriving an inductively generated voltage, current or charge from a first machine element (5), preferably a shaft, into a second machine element (1), having a shaft grounding element (4, 50) for discharging, according to the invention, the shaft grounding element (4, 50) is a component separated from a starting material, preferably a continuous article, said component being penetrated by channels (16) in the longitudinal direction thereof or being provided with perforations and / or surface structures and / or surface textures at least on the contact surface thereof with the first machine element. The invention also relates to a method for manufacturing the shaft grounding device.

Common mode voltage discharge shields are disposed over end turns of stator windings for a three phase electric traction motor within an electric vehicle. The common mode voltage discharge shields are capacitively coupled to the end turns to a ground strap, providing a low impedance path for common mode voltages accumulating at a neutral for electric traction motor as a result of high frequency switching of the motor drive voltage to produce desired torque. An insulating layer separates the common mode voltage discharge shields from the end turns. Accumulation of the common mode voltage in excess of a bearing breakdown voltage, and the associated potential for discharge through bearings between the stator and rotor and electrical discharge machining, is reduced or eliminated.

The invention relates to a driving motor bearing sealing structure and a vehicle, the driving motor bearing sealing structure comprises a shell, a first labyrinth ring and a second labyrinth ring, a stator and a rotor are arranged in the shell, the stator is fixed in the shell, a rotating shaft is inserted in the rotor, a non-driving end of the rotating shaft is axially sleeved with a bearing, a support is arranged outside the bearing, and the first labyrinth ring and the second labyrinth ring are arranged in the shell. The support is fixedly provided with a first flow guide ring, and first flow guide fibers are arranged in the first flow guide ring and make contact with the surface of the rotating shaft. The first labyrinth ring is axially arranged at the non-driving end of the rotating shaft in a sleeving mode, the second labyrinth ring is fixed to the shell, sealing teeth of the first labyrinth ring are meshed with sealing teeth of the second labyrinth ring, a cover plate is arranged outside the second labyrinth ring in a sealing mode, a second flow guide ring is installed on the side, close to the cover plate, of the second labyrinth ring, and second flow guide fibers are arranged in the second flow guide ring. And the second flow guide fiber is in contact with the surface of the first labyrinth ring.

The conductive structure (1) includes an annular holding member (10) having conductivity, a conductive member (20) formed of an annular metal material, and a support member (30) formed of an annular elastic material. The conductive member (20) and the support member (30) overlap in the axial direction of the axis x and are held by the holding member (10). The conductive member (20) has an annular inner peripheral end portion (25), and the support member (30) overlaps the conductive member (20) so as to be able to press the inner peripheral end portion (25) of the conductive member (20) toward the inner peripheral side.

The utility model discloses a stepping motor with drive control, which comprises a motor body and an integrated wire protection box, the motor body comprises a shell and a top cover, the shell is also provided with an open slot, the integrated wire protection box is fixed on the motor body, a drive control unit is arranged in the integrated wire protection box, and the drive control unit is fixed on the motor body. The open slot is communicated with the integrated wire protection box, a plurality of phase wire needles are fixed on the motor body, and the phase wire needles are led out from the open slot to be connected with a driving control unit in the integrated wire protection box. By arranging the driving control unit in the integrated wire protection box, on one hand, the integrated wire protection box plays a role in connecting an external power supply and a bridge of the motor body, and the working requirement of the motor body can be met without finding a matched driving control unit; and on the other hand, the integrated wire protection box is fixed on the open slot of the motor body through the connecting part, and the extension position is further arranged to completely wrap the open slot, so that better protection and anti-interference effects on the motor body are achieved.

The invention provides a power assembly capable of preventing electric corrosion of a bearing and an electric vehicle. A shell of the power assembly is used for containing a driving motor, and the driving motor comprises a motor shaft and a motor stator. The motor shaft is used for driving wheels through the reducer. The shell comprises an axial shell arranged on one side of the motor stator in the axial direction of the motor shaft, and the end face, facing the motor stator, of the axial shell comprises a bearing groove and an axial protrusion. The bearing groove is used for containing a motor bearing to be in transmission connection with a motor shaft. One end of the axial protrusion is used for being fixedly connected with the groove bottom of the bearing groove, and the other end of the axial protrusion is used for extending into a shaft hole of the motor shaft in the axial direction of the motor shaft. The end face of the other end of the axial protrusion comprises a through hole used for communicating the internal flow channel of the axial shell with the shaft hole of the motor shaft. And a gap between the axial bulge and the shaft hole is used for accommodating the conductive structure. According to the power assembly, the structure that the shell supplies oil to the shaft hole of the motor shaft is used for conducting the shaft current of the motor shaft to the shell to be grounded so as to protect the motor bearing.

The invention relates to the technical field of wind driven generators, in particular to a system for reducing generator shaft current damage and a working method.The system is characterized in that a generator spindle is connected with a generator shell through at least one insulating bearing, and at least one grounding ring is further arranged on the generator spindle; the grounding ring is grounded through a carbon brush and a grounding wire which are connected in sequence; the grounding wire is provided with a current transformer, and the current transformer is used for obtaining grounding current data and transmitting the grounding current data to the data processing end. And the data processing end is used for predicting working state data of the insulating bearing based on the grounding current data, the data of the environment where the fan is located, the fan operation data and the insulating bearing data, and evaluating whether a shaft current risk alarm is sent or not based on the working state data of the insulating bearing. By monitoring and evaluating the working state of the insulating bearing of the system, operation and maintenance personnel can master the working state of the insulating material of the insulating bearing at any time, and the situation that equipment is damaged by shaft current due to failure of the insulating material is avoided.

Proposed is a shaft grounding ring including an annular housing having a first through hole in a central portion thereof through which a motor shaft passes in a front-back direction, and having brush mounting grooves arranged radially on a front thereof, a plurality of grounding brushes respectively inserted into the brush mounting grooves of the housing, and an elastic end of which is in electrical contact with an outer circumferential surface of the motor shaft, and an annular cover coupled to the housing with the grounding brushes in between to fix the grounding brushes, having a second through hole in a central portion thereof in a front-back direction, which communicates with the first through hole and through which the motor shaft passes, and having radially arranged pin holes drilled in the front-back direction so that contact pins of a pressing jig penetrate and contact the front of the housing.

A discharge device for discharging electric currents from a rotor part of a machine, said rotor part having a shaft, the discharge device comprising an axially displaceable contact element, which is at least partly accommodated in a guide, for forming an electroconductive sliding contact between a sliding contact surface of the contact element and a shaft contact surface of the shaft, the sliding contact surface being provided for forming the sliding contact, the contact element being electroconductively connected to the guide and / or a retaining element of the machine, and the contact element being prestressed towards the shaft contact surface by means of a spring element, the contact element being at least partly wetted with an oily fluid, in particular at least in the area of its sliding contact surface.

The utility model provides a low-interference type brush motor, and relates to the technical field of motors. The motor comprises a motor casing, a motor end cover, a circuit board, a driving unit and an output shaft, the motor casing is provided with a mounting port, the motor end cover can block the mounting port, the circuit board is arranged on the motor end cover, and a plurality of electronic components are arranged on the circuit board. And the driving unit is arranged in the motor shell and is in transmission connection with the output shaft. The circuit has the advantages of being good in electromagnetic compatibility and high in stability.