23results about How to "Avoid demagnetization" patented technology

The invention discloses a permanent magnet direct-drive top drive motor and an installation method thereof, belongs to the technical field of direct-drive permanent magnet motors, and aims to solve the technical problem of poor heat dissipation performance of a permanent magnet direct-drive top drive motor in the prior art. The motor comprises a main shaft, a stator assembly, a rotor assembly, a cooling assembly and a shell. The rotor assembly comprises a rotor core and a rotor support. The main shaft is connected with the rotor core through the rotor support. The cooling assembly comprises a draught fan, an air guide barrel connected with the output end of the draught fan and an air guide piece arranged in the shell. The air guide sheets and the inner wall of the shell form a first cooling flow channel; the shell comprises an upper end cover and a lower end cover, and a plurality of first ventilation holes are formed in the lower end cover. Cooling air is input by the draught fan, passes through the air guide barrel and the first cooling flow channel and then is output through the first ventilation hole. The permanent-magnet direct-drive top-drive motor provided by the invention is convenient to assemble, high in reliability, good in overall heat dissipation efficiency and long in service life.

The invention discloses a motor rotor structure with a magnetism gathering effect, an assembling method and a motor, and belongs to the field of permanent magnet synchronous motors. The rotor structure comprises a rotor iron core and a Halbach magnetic steel array; the Halbach magnetic steel array comprises circumferential magnetizing magnetic steel and radial magnetizing magnetic steel which are alternately distributed in the circumferential direction. The radial thickness of the radial magnetizing magnetic steel is greater than that of the circumferential magnetizing magnetic steel, so that the rotor iron core forms a rotor iron core boss at each circumferential magnetizing magnetic steel; the radial magnetizing magnetic steel is divided into N magnetic steel blocks in the circumferential direction, and the radial thickness of each side block is gradually increased from the outer side edge to the inner side edge. Preferably, the two side edges of the radial magnetizing magnetic steel are recessed towards the center block to form a V shape, and the vertex of the V shape is the intersection of the outer side edge of the edge block, the circumferential magnetizing magnetic steel and the rotor core boss. According to the Halbach permanent magnet array, the problems that the Halbach permanent magnet array is large in assembly difficulty, serious in demagnetization phenomenon and low in overload performance can be solved while the magnetism gathering effect of the Halbach permanent magnet array is utilized.

The invention discloses a liquid cooling hub motor, and relates to the technical field of hub motors. The rotor is used for driving the rim to rotate; the stator support is rotationally arranged on the inner circumferential side face of the rotor, and a stator is arranged on the outer circumferential side face of the stator support; and the cooling flow channel is integrally in a wave shape and is arranged in the stator support in a surrounding mode, an inlet channel is formed in the first end of the cooling flow channel, and an outlet channel is formed in the second end of the cooling flow channel. According to the liquid-cooled hub motor, the technical problem that the hub motor is overheated when the hub motor is continuously used at overpower in the prior art is solved, the cooling liquid is circularly input into the cooling flow channel through the inlet channel, heat on the stator support is taken away, and the performance of the hub motor can still be kept unchanged when the hub motor is continuously used at overpower. And the overall structure of the cooling flow channel accords with fluid mechanics, and the cooling liquid does not form turbulent flow and vortex when flowing in the cooling flow channel, so that the energy consumption required for driving the cooling liquid to flow can be reduced.

The utility model relates to a motor cooling structure, a motor and an automobile, the motor cooling structure comprises a shell, a mounting cavity is formed in the shell, an oil way structure is arranged on the inner wall, defined by the shell, of the mounting cavity, and the oil way structure is used for communicating with an external oil supply device; the stator assembly is arranged on the inner wall of the mounting cavity and is communicated with the oil path structure; the rotor assembly is inserted into the stator assembly, the rotor assembly comprises a rotor shaft and a rotor iron core, and the rotor shaft is provided with an oil inlet channel extending in the axial direction of the rotor shaft and an oil passing channel extending in the radial direction of the rotor shaft; the oil inlet channel is communicated with the oil passing channel and used for being communicated with an external oil supply device, the rotor iron core is arranged outside the rotor shaft in a sleeving mode, the rotor iron core is provided with a cooling channel which extends in the axial direction and penetrates through the two ends of the rotor iron core, and two channel openings of the cooling channel correspond to coil inner rings of the stator assembly respectively.

The invention relates to a heat dissipation type loudspeaker, which comprises an outer frame, a vibration assembly, a voice coil assembly, a magnet assembly and a cooling assembly, and is characterized in that the vibration assembly, the voice coil assembly and the magnet assembly are arranged in the outer frame; the two ends of the voice coil assembly are connected to the vibration assembly and the magnet assembly respectively, and the cooling assembly is arranged on the outer side of the magnet assembly.

The invention discloses a rotor oil cooling structure of a motor and an electric drive assembly system, and relates to the technical field of permanent magnet synchronous motors, a rotor comprises a rotating shaft and a rotor iron core which are coaxially arranged, rotor pressing plates are arranged at the two ends of the rotor iron core, and the oil cooling structure comprises an oil inlet which is arranged on the rotating shaft so as to be connected with external oil; the inner cavities of the clockwise reciprocating oil way, the anticlockwise reciprocating oil way, the rotating shaft, the rotor pressing plates and the rotor iron core are respectively provided with oil liquid channels which are communicated with one another, and the rotating shaft is respectively provided with oil outlet holes which are opposite to the two rotor pressing plates; oil enters the corresponding rotor pressing plates from the oil outlet holes of the rotating shaft and is divided into at least two oil branches, so that a clockwise reciprocating oil way and an anticlockwise reciprocating oil way are formed in the rotor iron core with the de-weight hole structure, the oil branches are combined in the other rotor pressing plate, and then the oil branches are thrown to the end of the stator winding through the oil throwing holes formed in the rotating shaft. An oil way in the rotor is changed into a reciprocating oil way from a single-way structure, the oil way contact area is increased, and the cooling effect is more ideal.

The utility model discloses a single-stator single-rotor axial magnetic field hybrid excitation brushless synchronous motor, which comprises a casing, a rotating shaft, a rotor yoke part, a main generator, an alternating current exciter and a rotary rectifying device, the casing is provided with an assembly cavity, the rotating shaft is rotatably connected with the casing, the rotor yoke part is fixedly connected with the rotating shaft, and the main generator is arranged in the assembly cavity. The main generator comprises a main generator stator arranged on the cavity wall of the assembly cavity and a main generator rotor arranged on the rotor yoke part, the alternating current exciter comprises an exciter rotor arranged on the rotor yoke part and an exciter stator arranged on the cavity wall of the assembly cavity, and the rotary rectifying device is arranged on the side, provided with the exciter rotor, of the rotor yoke part. According to the utility model, the main generator and the alternating-current exciter are configured into a single-stator single-rotor axial magnetic field motor to form an excitation magnetic circuit and a permanent magnetic circuit which are independent from each other, and when the motor operates in a wide speed regulation range, the current input into a stator winding of the exciter can be reduced or increased to realize magnetic reduction or magnetic increase; and demagnetization of the permanent magnet is avoided while the operation efficiency is not reduced.

The invention provides a trailer stepless hybrid excitation retarder, and particularly relates to the technical field of vehicle non-contact auxiliary braking, the trailer stepless hybrid excitation retarder comprises an outer stator, a permanent magnet, a retarder rotor, a stator iron core, a magnet yoke, an excitation winding, a servo motor and an oil nozzle; the retarder rotor comprises a rotor disc and a rotor sleeve; the permanent magnet body is attached to the outer surface of the rotor sleeve; the rotor iron core is installed in the retarder rotor. The excitation winding is wound on the stator iron core, and a gap is reserved between the rotating disc and the rotor sleeve so that the excitation winding can be externally connected with a binding post. The retarder has the advantages that the retarder can realize double stepless braking through the brake pedal, so that the braking torque is increased, and the control precision of the braking torque is also improved; the retarder adopts a water-cooling and oil-cooling heat dissipation mode, and the heat dissipation effect is good.

The invention discloses a vehicle and a control method and device thereof, a storage medium and a computer program product, and the method comprises the steps: obtaining the state information of the vehicle under the condition that a motor of the vehicle needs to be started in a preset outdoor environment temperature range; determining whether the current state of the vehicle allows a motor of the vehicle to start or not according to the state information of the vehicle; if it is determined that the current state of the vehicle does not allow the motor of the vehicle to start, controlling the motor of the vehicle not to work; if it is determined that the current state of the vehicle allows starting, the current temperature of a motor is obtained, and running information of the vehicle is obtained; and in combination with the current temperature of the motor and the running information of the vehicle, the motor starting of the vehicle is controlled, so that protection control over the motor starting of the vehicle within the preset outdoor environment temperature range is achieved. According to the scheme, starting protection is carried out on the vehicle according to the temperature of the motor under the low-temperature condition, the motor is prevented from being demagnetized under the action of large current, the motor operates normally, and the safety of the vehicle is improved.

The utility model discloses a coaxial electric driving device and a vehicle. The coaxial electric driving device comprises a shell, a rotor shaft, an output half shaft and a first sealing piece. Wherein the shell is provided with a first cooling liquid channel; the rotor shaft is provided with a hollow cavity and at least one liquid inlet hole formed in the peripheral wall of the rotor shaft, and the liquid inlet hole is communicated with the hollow cavity; the output half shaft is arranged in the hollow cavity in a penetrating mode and is coaxial with the rotor shaft, a gap is formed between the output half shaft and the cavity wall of the hollow cavity, the gap forms a second cooling liquid channel, the second cooling liquid channel is used for containing cooling liquid, and the second cooling liquid channel is communicated with the first cooling liquid channel through the liquid inlet hole; the first sealing piece is arranged at the end of the second cooling liquid channel and used for preventing the cooling liquid from flowing out of the second cooling liquid channel. According to the coaxial electric driving device, the rotor shaft and the rotor can be cooled in the small-size electric driving device, and the path is simple and easy to implement.

The invention relates to the technical field of motors, and discloses a phase change material-based high-reliability fault-tolerant motor, which comprises a casing, a stator and a rotor, and is characterized in that the stator comprises a stator iron core and a stator winding, the stator iron core is detachably mounted in the casing, and a plurality of excitation teeth and a plurality of fault-tolerant teeth are arranged on the inner side of the stator iron core; the plurality of excitation teeth and the plurality of fault-tolerant teeth are respectively and uniformly distributed along the periphery of the stator iron core, the excitation teeth and the fault-tolerant teeth are alternately arranged, stator windings are wound on the excitation teeth, the fault-tolerant teeth are provided with separation grooves which are arranged along the radial direction of the stator iron core, and the separation grooves are filled with phase-change materials. When the input current of the stator winding is increased or a short circuit fault occurs, the heat generated by the stator winding is increased, and the heat is absorbed by the phase change material in the separation groove after being transmitted to the stator iron core, so that the normal work of the motor is ensured, and the improvement of the power of the motor and the improvement of the reliability of the motor are facilitated.

The invention discloses a superconducting disc motor, wherein the stator comprises a stator shell and a stator core; the rotor comprises a rotor shaft; the stator core comprises a wedge-shaped core body formed by stacking oriented silicon steel; a superconducting coil is wound between the two ends of the wedge-shaped core body; a plurality of stator cores are distributed and rotated about an axis parallel to the direction of the magnetic field thereof and arranged in a disc shape; the stator cores arranged in a disc shape are coaxially embedded in the stator shell; a rotor back iron shell is coaxially sleeved on the hollow rotor shaft, and a copper heat-conducting component is included in the hollow rotor back iron shell; the copper heat-conducting component comprises a columnar end parallel to the rotor axis, and the columnar end is arranged in a circular ring along the rotor rotation direction; a superconducting coil is wound on the columnar end extending from the rotor back iron shell to the outside of the rotor back iron shell; the outer shell comprises a cooling gas / liquid circuit, and the cooling circuit cools the hollow cavity in the potted stator; a cooling gas / liquid circuit is included in the rotor back iron shell, and the rotor shaft is a hollow shaft.

The utility model relates to a relay which comprises a movable contact component, arc extinguishing magnetic steel and an arc blocking piece. The arc extinguishing magnetic steel is arranged on the peripheral side of the movable contact part, and the arc blocking piece is arranged between the movable contact part and the arc extinguishing magnetic steel and used for blocking contact between the arc and the arc extinguishing magnetic steel. The arc extinguishing magnetic steel is arranged on the peripheral side of the moving contact component, and the magnetic field generated by the arc extinguishing magnetic steel can stretch the arc into a slender shape, so that the contact area between the arc and a surrounding medium can be increased, heat dissipation is accelerated, and cooling and extinguishing of the arc are realized. According to the relay, the arc blocking piece is arranged between the arc extinguishing magnetic steel and the movable contact component, and the arc blocking piece can block the arc, so that the arc can be prevented from being in contact with the arc extinguishing magnetic steel, the arc extinguishing magnetic steel is prevented from being demagnetized under the action of the high-temperature arc, arcing aggravation caused by demagnetization is avoided, and the failure time of the relay is prolonged.

This application relates to the field of motor technology and discloses a rotor stack and rotor. The rotor stack includes multiple first rotor laminations and second rotor laminations. The first and second rotor laminations respectively form multiple first and second magnet slots for accommodating magnets. The first and second magnet slots are axially offset and interconnected, such that the first sidewall of the first magnet slot abuts against the first sidewall of the magnet, and the sixth sidewall of the second magnet slot abuts against the second sidewall of the magnet. The distance between the first and sixth sidewalls is equal to the thickness of the magnet, thereby fixing the magnets without the need for resin potting in the magnet slots, reducing rotor production costs and improving rotor production efficiency. It also avoids magnet damage due to stress concentration. The gap formed between the sidewall of the magnet slot and the sidewall of the magnet constitutes part of the rotor cooling channel, allowing the magnets to be directly cooled by the cooling medium, avoiding demagnetization caused by high temperatures.

The utility model belongs to liquid pump technical field, including high temperature high pressure magnetic force pump body, semiconductor refrigeration mechanism, heat dissipation water tank, water level switch, alarm, bottom plate, circulating mechanism, circulating mechanism includes volute, impeller, shaft, high temperature high pressure magnetic force pump body and volute, heat dissipation water tank are fixedly installed on the bottom plate, and semiconductor refrigeration mechanism is fixedly installed in heat dissipation water tank outside one end, the outer shell outside of outer magnetic rotor and inner magnetic rotor of high temperature high pressure magnetic force pump body is fixedly installed with hollow heat dissipation shell, and heat dissipation shell is connected between volute and water tank, the utility model discloses a volute in the impeller of high temperature high pressure magnetic force pump body is powered, and the key part of high temperature high pressure magnetic force pump body is cooled for outer magnetic rotor or inner magnetic rotor through semiconductor heat dissipation mechanism, heat dissipation water tank, circulating water, and when the water is insufficient in heat dissipation water tank, can in time through the alarm prompt staff to add, effectively prevent the problem of outer magnetic or inner magnetic rotor demagnetization caused by temperature too high.

The present invention discloses a motor for a submersible well. The motor shaft is provided with a hollow structure inside. Through holes are provided in the radial direction of the thrust ring, the first bearing and the second bearing at the junction of the motor shaft. An internal medium channel is formed between the shield sleeve and the motor rotor assembly. Cooling water is pre-stored in the internal medium channel. The internal medium channel is connected to the hollow part of the motor shaft through the through hole. When the motor rotates, the cooling water forms a cooling cycle inside the motor to take away the heat of the bearing friction and the motor rotor and the motor stator. An outer cylinder is provided outside the motor to form an outer channel with the motor housing. The pumped medium is forced to cool the motor and take away the heat of the motor. The present invention effectively reduces the temperature rise of the motor, increases the service life of the bearing system, prevents the overheating and demagnetization of the magnetic steel and the insulation damage caused by the overheating of the winding, and can also significantly reduce the noise and vibration of the motor operation. There is no risk of leakage, no mechanical seal and maintenance-free, improves the efficiency of the motor, and expands the application range of the motor.

The invention discloses a rotor superconducting structure, wherein a rotor back iron shell is coaxially sleeved on a hollow rotor shaft, and a copper heat-conducting component is included in the rotor back iron shell; the rotor back iron shell includes a hollow shell in the shape of a disk, and an end plate sealably assembled at the rear end of the hollow shell; both the hollow shell and the end plate include an axial hole for sealably assembling the rotor shaft; the copper heat-conducting component includes a columnar end parallel to the rotor axis, the columnar ends are arranged in a circular ring distribution along the rotor rotation direction; and an annular bottom located at the root of the columnar end for connecting multiple columnar ends in series; a through hole for matching the columnar end is included on the front end surface of the hollow shell; a superconducting coil is wound on the columnar end extending out of the hollow shell; and a distributed cooling gas / liquid circuit is included in the cavity formed in the rotor back iron shell. The temperature rise of the rotor part can be improved, and the demagnetization of the permanent magnet caused by excessively high rotor temperature can be avoided.

The invention provides a motor rotor punching sheet and a motor rotor, the motor rotor punching sheet comprises a punching sheet body and a plurality of magnetic steel accommodating groove groups arranged on the punching sheet body, the plurality of magnetic steel accommodating groove groups are sequentially arranged along the circumferential direction of the punching sheet body, and at least one group of adjusting structure is arranged in the area where each magnetic steel accommodating groove group is located. The multiple sets of adjusting structures are sequentially arranged in the circumferential direction of the punching sheet body, each adjusting structure comprises at least one first auxiliary groove and at least one second auxiliary groove, and the first auxiliary grooves and the second auxiliary grooves are formed in the outer diameter edge of the punching sheet body. The beneficial effects of the invention are that electromagnetic force and torque pulsation of the rotor are reduced, noise and vibration in the operation process of the motor are further reduced, the NVH performance of the motor is improved, 24-order and 48-order radial forces can be effectively reduced, and the NVH problem of the motor is improved.

The invention relates to a bonded neodymium iron boron magnet ring structure with demagnetization resistance and a magnetizing method thereof, and belongs to the field of permanent magnet motors, the outer diameter of the magnet ring structure is circular, the inner diameter of the magnet ring structure is a changing curve, the thickness of the inner diameter at the position of a main magnetic pole is reduced, and the thickness of the inner diameter at the transition position between the main magnetic poles is increased; and the magnetic ring structure is made of a bonded neodymium iron boron material. According to the magnetic ring structure, the functional inner diameter is adopted, the demagnetization resistance of the magnetic ring under the overload condition can be improved, irreversible magnetic flux loss is reduced, and the demagnetization problem is solved. On the basis of the same outer diameter and the same height, it can be guaranteed that the consumption of the bonded neodymium-iron-boron magnet is almost equal to that of a common magnetic ring, and cost is saved.

The invention discloses an oil-cooled motor structure, and relates to the technical field of motor cooling, the oil-cooled motor structure comprises a shell, a driving shaft, a rotor body, an oil guide ring and a conveying structure, the driving shaft is rotatably installed on the shell, the rotor body is provided with a hollow rotor shaft, the rotor shaft is in transmission connection with the driving shaft, and the oil guide ring is arranged in the shell. The oil guide ring is arranged on the driving shaft in a sleeving mode, the oil guide ring is arranged on the driving shaft in a sleeving mode, the oil guide ring is located at one end of the rotor shaft, an oil storage cavity is formed in the oil guide ring, and an oil outlet hole communicated with the oil storage cavity is formed in the side, facing the driving shaft, of the oil guide ring. The cooling oil conveying device is used for conveying cooling oil to the position between the driving shaft and the rotor shaft. The cooling oil is conveyed between the driving shaft and the rotor shaft through cooperation of the conveying structure and the oil guide ring, so that the cooling oil is in direct contact with the interior of the rotor body, the interior of the rotor body is cooled more rapidly, and the temperature of the rotor magnetic steel is rapidly reduced.

The invention discloses a hybrid superconducting disc motor with a superconducting rotor. The stator comprises a stator support and a stator core; the rotor comprises a rotor shaft and a back iron shell; the rotor back iron shell is coaxially sleeved on the hollow rotor shaft, and the rotor back iron shell comprises a copper heat-conducting component; the rotor back iron shell comprises a hollow shell and an end plate; the hollow shell and the end plate both comprise an axial hole for sealing and assembling the rotor shaft; the copper heat-conducting component comprises a columnar end, which is arranged in a circular ring distribution along the rotation direction of the rotor; an annular bottom located at the root of the columnar end and used for connecting a plurality of columnar ends in series; a through hole for matching the columnar end is comprised on the front end surface of the hollow shell; a superconducting coil is wound on the columnar end extending out of the hollow shell; a distributed cooling gas / liquid circuit is comprised in the cavity formed in the rotor back iron shell; the stator core comprises a wedge-shaped iron core body formed by stacking silicon steel layers; a copper wire coil is wound between the two ends of the wedge-shaped iron core body as a winding.

The utility model relates to the field of linear moving modules, and discloses a heat dissipation device and a linear module, the heat dissipation device comprises a containing groove formed in a sliding table, a plurality of fans and heat dissipation fins, and a plurality of ventilation holes are formed in the inner bottom surface of the containing groove in a penetrating mode; the fan is fixedly installed at the position, corresponding to the ventilation hole, of the inner bottom face of the containing groove, and the cooling fins are arranged on the inner bottom face of the containing groove. The containing groove is formed in the sliding table, the ventilation holes corresponding to the fans are formed in the inner bottom face of the containing groove, the distribution structure of the heat dissipation fins is combined, the fans can rapidly extract hot air around the motor rotor through the ventilation holes, meanwhile, the heat exchange area of the sliding table and air is increased through the heat dissipation fins, and the heat dissipation efficiency is improved. Multiple heat dissipation paths are achieved in a limited space, concentrated heat loads generated during operation of the motor rotor are effectively restrained, and the phenomena of electromagnetic performance attenuation and permanent magnet demagnetization caused by temperature rise are avoided.

The application relates to the technical field of transfer trademarks, and discloses replaceable magnetic silica gel heat transfer trademarks and a preparation method thereof, which comprises the following steps: performing surface roughening treatment on a neodymium-iron-boron solid magnet; mixing liquid platinum-catalyzed addition type silica gel and a silane coupling agent; performing gradient temperature vulcanization; pasting a hot melt adhesive film on the surface of a silica gel composite layer; and performing post-magnetization treatment by using a rotary magnetization tool in combination with finite element simulation. The replaceable magnetic silica gel heat transfer trademark and the preparation method thereof realize flexible integration of a magnetic attraction function and pattern customization through a sandwich type composite structure, users can freely replace trademark themes through magnetic attraction, and the needs of Z generation for socialization and collection are met; meanwhile, gradient vulcanization and nitrogen protection are adopted, the vulcanization temperature is controlled within the tolerance range of the magnet, and an epoxy resin coating is combined to avoid demagnetization.