854 results about "Magnetic line" patented technology

The invention discloses a sound production device, a sound production module and electronic equipment, and relates to the technical field of electroacoustic transduction, a vibration plate of a vibration system of the sound production device comprises a first plate part and a second plate part which are located on different horizontal planes, the top of a voice coil is connected with the first plate part, and the second plate part is located on the inner side of the voice coil; a center magnetic part of the magnetic circuit system comprises a first center magnet and a second center magnet which are located on the two opposite sides of the second plate part, the first center magnet is close to the top of the voice coil, and the second center magnet is close to the bottom of the voice coil. The first center magnet and the second center magnet are magnetized in the first direction and are opposite in magnetizing direction, and the magnetic energy product of the first center magnet is larger than that of the second center magnet. According to the sound production device, the thinning design can be realized, the BL value is effectively improved, the magnetic lines are distributed more uniformly, the BLx curve is flatter, and thus the distortion is reduced.

The invention relates to the technical field of high-energy particle diagnosis, and discloses an ion probe and diagnosis device.According to the scheme, an insulating plate is arranged in a probe, the insulating plate is plated with a plurality of aluminum films (forming conductive parts) arranged at intervals, when high-energy ions bombard the aluminum films at different positions, current signals can be generated in the corresponding conductive parts, and the high-energy ions can be detected through the current signals; the current amplifier amplifies a generated current signal, transmits the current signal to the signal processing system through the isolation amplifier, collects and analyzes the current signal by the signal processing system, and judges whether the conductive part is bombarded by high-energy ions by detecting the current signals formed in different conductive parts; the angle range of the high-energy ions relative to magnetic lines and the energy distribution range of the high-energy ions are obtained; according to the scheme, the aluminum film is bombarded based on the high-energy ions, the current signal is generated, the experiment cost can be effectively reduced, collection is greatly facilitated, interference of other signals is avoided, and the accuracy of high-energy ion diagnosis is improved to a certain extent.

The invention discloses a sound production device, a sound production module and electronic equipment, and relates to the technical field of electroacoustic transduction, a vibration plate of a vibration system of the sound production device comprises a first plate part, a second plate part and a third plate part which are integrally arranged, the first plate part and the second plate part are located on different horizontal planes, the top of a voice coil is connected with the first plate part, and the top of the voice coil is connected with the third plate part. The third plate part is connected with the inner circumferential wall of the voice coil in an attached mode, the two ends, in the first direction, of the third plate part are connected with the first plate part and the second plate part respectively, and a center magnetic part of the magnetic circuit system comprises a first center magnet and a second center magnet which are located on the two opposite sides of the second plate part. The sides, facing the vibrating diaphragm assembly, of the first center magnet and the second center magnet are both exposed in the inner cavity of the sound production device, and the first center magnet and the second center magnet are magnetized in the first direction and are opposite in magnetizing direction. According to the sound production device, the thinning design can be realized, the BL value is effectively improved, the magnetic lines are distributed more uniformly, the BLx curve is flatter, and thus the distortion is reduced.

The invention discloses a sound production monomer and electronic equipment, and relates to the technical field of sound energy conversion, the sound production monomer comprises a shell, a magnetic circuit system and a vibration system, the magnetic circuit system comprises a support plate, a center magnetic circuit and a side magnetic circuit, the support plate is made of a magnetic conductive material, and a magnetic gap is formed between the center magnetic circuit and the side magnetic circuit; the central magnetic circuit comprises a first magnet, a concentrating flux plate and a second magnet, the side magnetic circuit comprises a first side magnet, a middle side magnet and a second side magnet which are sequentially arranged in the first direction, and the side magnetic circuit can form a magnetic field enhancement side facing the magnetic gap; the vibration system comprises a vibrating diaphragm and an annular voice coil used for driving the vibrating diaphragm to vibrate in the first direction, one end of the annular voice coil is connected with the vibrating diaphragm, and the other end is located in the magnetic gap. The magnetizing directions of the magnets in the center magnetic circuit and the side magnetic circuits are designed, so that magnetic lines of force can be focused at the position of the magnetic conductive plate, the intensity of a magnetic field is greatly improved, a magnetic field enhancement side facing a magnetic gap is formed, and the acoustic performance of the loudspeaker is improved.

The invention provides a magnet, an electronic device and a charging device, the magnet comprises a first sub-magnet and a second sub-magnet, the direction of magnetic lines in the first sub-magnet and the direction of magnetic lines in the second sub-magnet are inclined to the plane where the magnet is located, and more magnetic lines can be gathered in the space on one side of the magnet and are sparse around the magnet. According to the invention, by changing the distribution of the magnetic lines of force of the magnet, the magnet with a small size can generate a strong suction force or a repulsive force, the use amount of materials for manufacturing the magnet is small, and the adverse effect of the magnet on surrounding electronic components is small. The magnet can be assembled in electronic equipment with a limited accommodating space, and the magnet is wide in application scene and beneficial to saving rare earth elements and other resources for manufacturing the magnet.

The invention discloses a sound production device, a sound production module and electronic equipment, and relates to the technical field of electroacoustic transduction, a vibration plate of a vibration system of the sound production device comprises a first plate part and a second plate part which are located on different horizontal planes, the top of a voice coil is connected with the first plate part, and the second plate part is located on the inner side of the voice coil; a central magnetic part of the magnetic circuit system comprises a first central magnet and a second central magnet which are located on the two opposite sides of the second plate part, the first central magnet and the second central magnet are magnetized in the first direction, and the magnetizing directions of the first central magnet and the second central magnet are opposite. The side, opposite to the vibrating diaphragm assembly, of the first center magnet is connected with the first magnet yoke, the side, opposite to the vibrating diaphragm assembly, of the second center magnet and the edge magnetic part are connected with the second magnet yoke, and the peripheral edges of the first magnet yoke and the second magnet yoke are connected in a welded mode. According to the sound production device, the thinning design can be realized, the BL value is effectively improved, the magnetic lines are distributed more uniformly, the BLx curve is flatter, and thus the distortion is reduced.

The invention discloses a CFD (computational fluid dynamics) simulation-based magnetofluid jet shear polishing device and method. The device comprises an industrial five-axis machine tool, a fluid circulation system, a jet polishing module and a CNC (computer numerical control) system. The jet flow polishing module and the machined workpiece 8 are installed on a workbench and a tool installation base of the industrial five-axis machine tool respectively, and five-axis polishing machining can be achieved under the control of a CNC numerical control system. The jet flow polishing module comprises a jet flow tool head and a rotating magnetic field generating device. The rotating magnetic field is applied to the jet flow outlet of the jet flow tool head, ferroferric oxide particles in the polishing solution are driven to be arranged in the magnetic line direction to form a chain structure, the viscosity of the polishing solution is remarkably improved, and the polishing solution is endowed with the high-speed self-rotating motion characteristic. High-speed rotation and enhanced viscosity of the liquid column generate stronger shearing force, so that efficient material removal on the surface of a workpiece is realized.

The invention belongs to the technical field of batteries, and particularly relates to a pole piece processing system and a pole piece processing method. The pole piece treatment system comprises an electromagnetic induction heating unit, wherein the electromagnetic induction heating unit is used for carrying out electromagnetic induction heating treatment on a pole piece. According to the present invention, the binder floating on the surface of the pole piece can be reduced, and the pores are left in the active layer, such that the porosity of the pole piece is improved, and the infiltration rate of the electrolyte on the pole piece is improved; various burrs and particles on the edge of the active layer can be improved, so that the surface of the active layer becomes smoother, the sharpness of the surface of the pole piece is reduced, and the risk that the pole piece pierces an isolating membrane is reduced. Moreover, the conductive agent in the pole piece tends to be consistent in direction under the influence of magnetic lines generated in the electromagnetic induction process, so that the diaphragm resistance of the pole piece is further reduced.

The invention relates to the technical field of transformers, and particularly discloses a small-size and strong-short-circuit-current-resistant transformer, which comprises a transformer body, the transformer body comprises an iron core, a plurality of iron cores, a plurality of short-circuit-current-resistant coils, a plurality of short-circuit-current-resistant coils and a plurality of short-circuit-current-resistant coils, the insulating cylinder is arranged on the outer side of the core column in a sleeving manner; the winding sleeves the outer side of the insulating cylinder, the winding comprises a circular coil wound on the outer wall of the insulating cylinder and a plurality of layers of elliptical coils wound on the outer side of the circular coil, and the trend of the elliptical coils is parallel to magnetic lines generated by the circular coil; heat dissipation channels parallel to the axis of the core column are formed between the circular coils and the oval coils and between every two adjacent oval coils. The space of the core column can be effectively utilized, the elliptical ring can fill the external space, the magnetic field trend of the outer elliptical coil is parallel to that of the inner circular coil, high-frequency loss caused by the proximity effect and eddy-current loss during short circuit can be effectively reduced, and the normal operation efficiency and short-circuit endurance capacity of the transformer are improved.

The invention relates to the technical field of light sources, particularly discloses a method and a device for adjusting the central position of a plasma, and aims to realize accurate positioning and stable control of the plasma by accurately controlling output parameters of a magnetic field generator. According to the method, a magnetic field generator with a specific shape and distribution is utilized, a magnetic field with a closed magnetic line structure is generated in a plasma chamber, charged particles in plasma are guided to move along a preset path, and it can be ensured that the plasma reaches and is kept at an expected position by monitoring and adjusting magnetic field parameters in real time.

The invention belongs to the technical field of dampers, and particularly discloses a nonlinear bidirectional active anti-impact damper which comprises a cylinder body, a load connecting plate, an elastic supporting piece and a magnetic damping assembly, the load connecting plate is installed at one axial end of the cylinder body in a floating mode through the elastic supporting piece, the load connecting plate is connected with a piston rod, and the end of the piston rod extends into the cylinder body; the magnetic damping assembly comprises a magnet and a coil, one of the magnet and the coil is connected to the end of the piston rod, and the other one is connected into the cylinder body. The damper further comprises a displacement sensor and a controller, the displacement sensor is used for detecting displacement data of the load connecting plate, the controller is connected with the displacement sensor and the coil, and the controller is used for controlling the current of the coil so that the coil can cut magnetic lines of force of the magnet to generate magnetic damping force changing nonlinearly along with displacement. The damper can effectively restrain vibration impact, gentle impact resistance is achieved, and the influence of sudden impact force on the service performance of equipment is reduced.

The invention discloses a design method of a star simulator three-dimensional divertor target plate, and belongs to the technical field of magnetic confinement fusion. The method comprises the following steps: firstly, deducing a circumferential thermal load uniformity theoretical model, then, calculating background information required by target plate generation, and finally, carrying out target plate generation by using the obtained background information and the circumferential thermal load uniformity theoretical model. The target plate is generated based on parameter control, the target plate capable of achieving uniform distribution of the circumferential thermal load is provided, the circumferential uniform distribution of the thermal load of the divertor target plate can be effectively improved, and the peak value of the thermal load of the divertor target plate can be effectively reduced. The target plate generated by the method conforms to standard output formats among different analog calculations. Data can be conveniently transmitted between integrated simulation platforms, and the working process is simplified. The divertor target plate is generated on the basis of the basic physical assumption that the magnetic lines of the magnetic field and the heat flow are attenuated along the radial position, and the method is suitable for all star simulator devices with three-dimensional magnetic island structures and has universal applicability.

The utility model discloses a magnetic leveling device of a pendulum bob type laser demarcation device, which comprises a hanging bracket and a pendulum body hung in the hanging bracket, a magnetic damping body consisting of a plurality of magnets is arranged on the hanging bracket according to a Halbach array, and a magnetic field which is made of non-magnetic conductive materials and can cut magnetic lines in a magnetic field generated by the magnetic damping body is arranged on the pendulum body. The utility model aims to provide a damping piece which adopts two different forms of Halbach arrays to generate magnetic damping, and compared with the existing common magnet arrangement scheme, the magnetic flux is obviously enhanced, so that a stronger magnetic damping effect is generated, and the magnetic damping effect is improved. The magnetic leveling device can effectively prevent the swinging body from swinging excessively, so that the leveling time is effectively shortened, the leveling speed and precision of the laser demarcation device are further improved, and the working efficiency is remarkably improved.

The invention relates to the technical field of motors, in particular to a motor stator core. The motor stator core comprises a plurality of punching sheets, a plurality of pear-shaped grooves extending along the radial direction are uniformly distributed on the inner circumference of each punching sheet, and two adjacent surfaces of each pear-shaped groove are in fillet transition, so that magnetic field concentration of sharp edges is eliminated, and the problem of overhigh local magnetic flux density is reduced; the arc-shaped structure of the pear-shaped groove can provide a smoother magnetic path, magnetic resistance is reduced, magnetic lines are distributed more reasonably, magnetic hysteresis loss is reduced, and a magnetic circuit is improved. All the punching sheets are stacked in the axial direction, the pear-shaped grooves in all the punching sheets are in one-to-one correspondence to form a plurality of inclined notches, and compared with original vertical notches of the stator iron core, the inclined notches of the stator iron core have the advantages that the space for accommodating windings is increased, and the magnetic field density is improved. And the inclined notches enable the stator teeth and the rotor teeth to be not completely aligned, so that the tooth harmonic phases are different and mutually offset, thereby weakening the overall harmonic, reducing the electromagnetic noise and vibration, and further improving the motor performance.

An electromagnetic loading device for generating large displacement and a test method thereof, wherein an active coil and a sleeve are mounted on a central rod, and the inner circumferential surface of the sleeve is slidably matched with the outer circumferential surface of the central rod. A secondary coil is mounted on the sleeve, and the secondary coil and the sleeve are interference matched. A magnetic yoke made of soft magnetic material is designed outside the active coil and the secondary coil to constrain the magnetic lines of force of the pulse magnetic field generated by the active coil and the secondary coil under pulse excitation to diverge outward, so that the magnetic lines of force are concentrated around the coil, thereby increasing the electromagnetic force without increasing the capacitance size and initial voltage of the active coil charging and discharging circuit. According to numerical simulation, when the maximum voltage and capacitance are limited, the main force-bearing components of the loading device are always in the elastic stage of the secondary coil, the loading rod and the pad during the loading process, so that the entire loading device can be reused and the test repeatability is good.

The utility model provides a device for visually displaying the magnetic line of force of a magnet, which relates to the technical field of magnetic line of force display, and specifically comprises a transparent shell, magnetic current liquid and a light bar arranged on the side surface of the shell, the shell is formed by attaching two plates, the inner side of each plate is sunken to form a cavity, the magnetic current liquid is smeared in the cavity, and the light bar is arranged on the side surface of the shell. And the light bar illuminates the magnetic flow liquid towards the cavity. The magnetic particles of the magnetic flow liquid are attached to the interior of the cavity of the plate due to adsorption, precipitation and movement cannot occur, the magnetic flow liquid cannot move along with the magnetic flow liquid even if the magnetic particles are influenced by an external magnet, and the free magnetic particles can only be connected under the action of a magnetic field. And the annular wave-shaped magnetic lines of force between the two poles of the magnet can be seen through 360-degree annular irradiation of the lamp strips on the periphery. The device is simple in structure, low in failure rate and low in maintenance cost, can be used for testing at any angle state, is sensitive in response, and can instantly display the change track of magnetic lines.

The utility model discloses a Hall signal output device for a mouse wheel. Comprising an encoder fixing support arranged in the mouse, an encoder roller rotationally arranged in the encoder fixing support, a magnetic ring arranged in the encoder roller, and a Hall encoder which is arranged on the side edge of the encoder fixing support and right faces the magnetic ring. When the encoder roller rotates, the magnetic ring is driven to rotate, so that the direction of the magnetic line of force of the magnetic ring is changed, and the Hall encoder generates pulse signal output after identifying the change of the magnetic line of force of the magnetic ring. The Hall signal output device for the mouse wheel is simple in structure, low in production cost, high in precision and high in response speed, and meets the use requirements of modern people.

The invention relates to the technical field of vibration sensors, and discloses a miniaturized digital vibration sensor, which comprises a shell, one side of the shell is connected with a shell cover, and one side of the shell cover is provided with a detection assembly for detecting vibration; the detection assembly comprises a shielding seat and a connecting rod, one side of the top of the shielding seat is provided with a magnet, and the top of the magnet is provided with a magnetic core; a coil sleeving the outer side of the magnetic core is adhered to the bottom of the connecting rod; a ruby in contact with a to-be-detected object is fixed at the top of the connecting rod; the inner wall of the shell cover is in threaded connection with a pressing ring, the top of the pressing ring is connected with a second spring piece, the top of the second spring piece is connected with a supporting frame, when vibration is generated through rotation of the bearing, the ruby makes contact with an outer ring of the bearing and transmits the vibration to the connecting rod, and the connecting rod drives the coil to move on the outer side of the magnetic core, cuts magnetic lines of force and generates induction voltage. The electromagnetic induction principle ensures that a vibration signal can be accurately converted into an electric signal, so that high-precision vibration measurement is realized.

The present invention provides an oil pipeline cleaning robot, belonging to the technical field of oil pipeline cleaning. It includes a propulsion mechanism, at one end of which there is a steering column and a support column. The propulsion mechanism is movably connected to the support column through the steering column, and magnetic lines are arranged on the support column. It also includes a cleaning and resetting component connected to the support column, which is used for resetting and reducing the volume when the propulsion mechanism cleans inside the oil pipeline. The cleaning and resetting component includes a second push ring and a pair of first push rings. The second push ring is located between the pair of first push rings. The pair of first push rings are used to push out the sediments on the inner wall of the oil pipeline, and the second push ring is used to clean the sediments on the inner wall of the oil pipeline. By setting the cleaning and resetting component, the present invention can gradually clean the inner wall of the oil pipeline; during the contraction process of the support component, the support plate is driven to fold, which can reduce the volume of the cleaning and resetting component, and solves the problem that the cleaning robot in the prior art has a fixed structure and is difficult to take out once it gets stuck.

The invention belongs to the technical field of motor control, and particularly relates to a motor three-phase counter electromotive force phase sequence detection circuit and a running direction judgment device. The phase sequence detection circuit comprises a comparison circuit and further comprises a tachogenerator coaxially connected with the motor to be detected, and the output end of the tachogenerator is electrically connected with the input end of the comparison circuit so that the phase sequence of the three-phase counter electromotive force of the motor to be detected can be obtained through the three-phase voltage output by the tachogenerator through the comparison circuit. The three-phase counter electromotive force of the to-be-tested motor is directly detected through the tachogenerator coaxially connected with the to-be-tested motor. The rotor of the tachogenerator rotates along with the rotation of the motor to be tested, and the rotor of the tachogenerator cuts magnetic lines in the operation process, thereby generating the three-phase counter electromotive force of the motor to be tested. The technical problem that in the prior art, when ground voltage detection is not accurate due to external interference, detected counter electromotive force is not accurate, and then the motor control effect is affected is solved.

A magnetic field propulsion unit generates a drive force when being arranged in an external magnetic field. The magnetic field propulsion unit includes a support structure, a magnetic field generating device attached to the support structure and configured to generate a first magnetic field, an energy supply unit, and a control unit. The energy supply unit provides the magnetic field generating device with electrical energy. The control unit controls the energy supply unit so that the energy supply unit supplies energy to the magnetic field generating device. The control unit supplies varying current to the magnetic field generating device. The magnetic field generating device has a central axis and is arranged in the external magnetic field such that the central axis is inclined with respect to magnetic field lines of the external magnetic field at an angle different from 0°, 90°, 180°, and 270°.

The invention discloses a sound production device, a sound production module and electronic equipment, and relates to the technical field of electroacoustic transduction. A vibration plate of a vibration system of the sound production device comprises a first plate part and a second plate part which are arranged in a split mode and located on different horizontal planes; the waterproof film comprises a first connecting part located at the top of the voice coil, a second connecting part in attached connection with the inner circumferential wall of the voice coil and a third connecting part located in the voice coil, the first plate part is connected with the first connecting part, and the second plate part is connected with the third connecting part; a center magnetic part of the magnetic circuit system comprises a first center magnet and a second center magnet which are located on the two opposite sides of a second plate part, the first center magnet and the second center magnet are magnetized in the first direction, and the magnetizing directions are opposite. According to the sound production device, the thinning design can be realized, the BL value is effectively improved, the magnetic lines are distributed more uniformly, the BLx curve is flatter, and thus the distortion is reduced.

To provide a magnetic therapeutic device capable of suppressing alignment disorder of a magnetic line.SOLUTION: A magnetic bracelet 10 as a band-shaped magnetic therapeutic device in which multiple magnet pieces 11, 12 are connected in a rosary shape in multiple columns includes a first magnet piece 11 having a large magnetic line strength and a second magnet piece 12 having a small magnetic line strength. One or two second magnetic pieces 12 are arranged between the first magnetic pieces 11 in a rosary shape connection direction of each column, and the first magnetic piece 11 and the second magnetic piece 12 are adjacent to each other among the respective columns of the band shape in a lateral width direction.SELECTED DRAWING: Figure 2B

The invention belongs to the field of oil and gas exploitation, geothermal exploitation and deep ground engineering, and discloses an oil and gas shaft crack plugging pressure repair material and method based on microwave heating bismuth-based alloy, the material comprises 74%-86% of bismuth-based alloy powder, 10%-15% of Fe3O4-SiO2 core-shell magnetic particles, 3%-8% of a microwave sensitizer and 1%-3% of a wetting agent. The repairing material is conveyed to the position, where shaft crack plugging repairing needs to be conducted, in the oil and gas shaft, then the repairing material is melted in a microwave heating mode, then the melted alloy is filled in shaft crack plugging, and then a rotating gradient magnetic field is used for repairing the oil and gas shaft crack. And the liquid alloy is driven to directionally migrate to a target crack area along the magnetic line, and after alloy liquid is cooled and solidified, pressure repairing of the oil and gas shaft crack plugging target position is achieved. Precise positioning, efficient filling, phase change control and complete recovery of the repairing material can be achieved in the extremely deep environment, and therefore the high-quality repairing requirement for oil and gas shaft crack plugging pressure repairing achieved through efficient liquefaction of plugging metal can be met.

The invention discloses a vacuum arc extinguish chamber structure with large rated current and strong breaking capacity, which comprises a structure body, and is characterized in that the structure body comprises a static contact assembly, the static contact assembly comprises a static end arc contact and a static end main contact, and the static end arc contact is arranged in front of the static end main contact and protrudes for a preset distance d along the on-off direction; and the moving contact assembly comprises a moving end main contact and a moving end arc contact, and the moving end main contact and the moving end arc contact are located on the same plane. According to the invention, the effect that the main contact does not burn arc during breaking is realized, the contact surface of the main contact is protected from being ablated by the arc, and a physical foundation is laid for the high capacity of the vacuum arc-extinguishing chamber. The moving end arc contact is provided with a coil structure so as to generate a transverse magnetic field or a longitudinal magnetic field, and the magnetic lines of force between the static end arc contact and the moving end arc contact have the combined action of the longitudinal magnetic field and the transverse magnetic field, so that the breaking capacity is high.

The invention relates to an arc-shaped continuous casting space-time electromagnetic stirring device and method.The electromagnetic stirring device comprises a foot roller, a secondary cooling area, a solidification tail end and a plurality of electromagnetic stirring assemblies; the electromagnetic stirring assembly comprises a coil, an axial magnet yoke and a radial magnet yoke; the axial magnet yoke is fixedly mounted on the back of the radial magnet yoke, so that the electromagnetic stirring assemblies mounted in the secondary cooling area are connected in series; alternating current is applied to each coil, induced magnetic lines of force flow through the radial magnet yokes and the axial magnet yokes, a superimposed magnetic field moving in the radial direction and the axial direction is generated, the superimposed magnetic field interacts with the induced current to form spirally upward electromagnetic force, and molten metal is driven to move spirally. A flow field and a temperature field in a casting blank are improved, a stirring area is enlarged, and center porosity, shrinkage cavities and segregation are reduced. Compared with the prior art, the device has the advantages of integration of multiple functions, enlargement of a stirring area, flexible and adjustable parameters, defect control, high universality and the like.

The invention provides a self-power-generating wheel body structure with a shaft wheel rotating synchronously without differential speed, and relates to the technical field of power-generating wheels, the self-power-generating wheel body structure comprises a fixed part and a rotatable part which are arranged in a coupling mode; the rotatable part comprises a wheel, and a connecting component is arranged in the rotatable part; the connecting component is provided with a mounting position for mounting a power part; the power part is driven by a power source to generate torque, and then the rotatable part is driven to rotate relative to the fixed part with an axis as the center. A magnetic ring and a generator core which are correspondingly used are arranged at the joint of the fixed part and the rotatable part; the rotatable part rotates relative to the fixed part, so that the generator core and the magnetic ring rotate relative to each other to cut magnetic lines of force to generate current. The self-generating wheel body has the beneficial effects that the blank of the self-generating wheel body in the existing market is filled, and the self-generating wheel body can be applied to a wheel body which is represented by a child tricycle and is positioned on a front fork, so that the wheel body can synchronously generate electricity or emit light by driving the wheel body to rotate through pedal rotation.

The invention provides a rotor punching sheet, a rotor iron core, a rotor, a motor and an air conditioner, the rotor punching sheet is provided with more than two magnetic pole forming areas corresponding to rotor magnetic poles, and each magnetic pole forming area is internally provided with a magnetic steel groove which is arranged on a q axis and extends along the radial direction; the rotor punching sheet is provided with a first magnetic barrier groove located on the d axis between every two adjacent magnetic steel grooves. Wherein first magnetic bridges are formed between the first magnetic barrier grooves and the adjacent magnetic steel grooves on the two sides, and the width of each first magnetic bridge is gradually increased in the radial outward direction of the rotor punching sheet. According to the technical scheme of the invention, the magnetic lines of force can be gradually drawn close to the d axis from the two sides of the d axis, and the sinusoidal property of the magnetic flux in the air gap is better, so that the torque pulsation of the tangential motor can be reduced.

The present invention relates to the technical field of pulse valves, and specifically refers to an intelligent electromagnetic pulse valve; it includes a valve body, a valve cover, a pressure relief seat, a magnetic coil and a moving iron core, the valve body is provided with an air inlet and an exhaust port connected to its inner cavity; the valve cover is provided with a first pressure relief channel; the magnetic coil is provided with a junction box; a humidity sensor is provided in the air inlet, and pressure sensors are provided in the air inlet, the exhaust port, the first constant pressure chamber and the second constant pressure chamber, the magnetic coil is provided with a temperature sensor, and an electric signal sensor is provided on the power supply circuit of the magnetic coil, and the temperature sensor, the humidity sensor, the electric signal sensor and several pressure sensors are respectively connected to the junction box through lines; the present invention has a reasonable structure, and a data collector can collect data from the sensors in real time, analyze faults through a remote terminal, and realize real-time monitoring and intelligent troubleshooting of the operating status of the electromagnetic pulse valve.

The utility model discloses a magnetic stirring system which comprises a magnetic stirrer, a stirring vessel, a stirring mechanism and a mounting mechanism, the stirring mechanism is used for forming a rotating structure in the stirring vessel, and the mounting mechanism is used for forming a movable structure on the stirring mechanism. The stirring rotor is inserted into the inner cavity of the stirring vessel in a sliding mode, the bottom end of the limiting rod is attached to the bottom of the inner wall of the stirring vessel, the stirring rotor is arranged above the bottom of the inner wall of the stirring vessel, and along with operation of the magnetic stirrer, the stirring rotor is driven to rotate through the magnetic action of the stirring rotor and magnetic lines of force; the connecting rod and the fixing block are driven to rotate in the inner cavity of the fixing seat, so that the stirring rotor stably rotates at the bottom of the inner cavity of the stirring vessel, a solution in the inner cavity of the stirring vessel is stirred, a gap is formed between the stirring rotor and the bottom of the inner wall of the stirring vessel, friction between the stirring rotor and the stirring vessel is reduced, and damage to the stirring rotor is reduced.