412results about How to "Increase magnetic flux" patented technology

A permanent magnet rotor for a brushless electric motor, comprising at least two main magnetic poles, disposed on a periphery of a rotor. Each opening angle A covers N / 2 times the opening angle of each of the stator sections, with N being an odd number greater or equal to 3. A is required to be the nearest angle that is smaller than 360 / P degrees, with P being the number of poles. Each of the main magnetic poles has a periphery with a central section R1 and two end sections R2 R1has an opening angle A1. The opening angle A1 covers N / 2 times the opening angle of each of the stator sections, with N being an odd number greater or equal to 3. A1 is required to be smaller than the opening angle A of each of the main magnetic poles of the rotor. Each of the main magnetic poles contains a dual-plate permanent magnet.

The invention discloses a radial magnetic field-based online abrasive grain monitoring sensor and monitoring method. The sensor comprises a magnetic field excitation source, an iron core, a detecting coil and an amplifying circuit, wherein a stable static magnetic field generated by the magnetic field excitation source forms a stable radial magnetic field by iron core optimization for being used for an oil pipe; and when an abrasive grain in the oil pipe generates inducing voltage by the detecting coil, the amplifying circuit carries out noise reducing and amplification processing output on the inducing voltage. The monitoring method comprises the following steps of: obtaining the induced voltage by the sensor; after processing the induced voltage by the amplifying circuit, obtaining an effective voltage signal; and confirming the motion speed, materials and size information of the abrasive grain by analyzing the waveform of the effective voltage signal. The invention uses the stable radial magnetic field as the monitoring magnetic field, optimizes the distribution of the magnetic field by an iron core, can effectively improve the sensitivity and precision of the sensor, is suitable for of the online abrasive grain monitoring of a hydraulic system and can provide service for the demand of state monitoring, fault diagnosis and service life prediction of the hydraulic system.

The invention relates to a wire winding machine for a stator core of a motor. The wire winding machine for the stator core of the motor comprises a rack, a wire arranging mechanism, a wire winding die and a driving mechanism. The rack comprises a rack frame body, a mounting plate and an upper tabletop plate, wherein the mounting plate is arranged longitudinally along the frame body, and the upper tabletop plate is arranged transversely along the frame body and located above the mounting plate. The wire arranging mechanism is arranged longitudinally along the rack and supported by the mounting plate of the rack and comprises an outer tube and an inner tube which is surrounded by the outer tube partially. The wire winding die is connected with the outer tube and the inner tube of the wire arranging mechanism, and the axial direction of the wire winding die and the axial direction of the mounting hole of the upper tabletop plate are on the same straight line. The driving mechanism is mounted on the rack and connected with the circumferential surface of the outer tube and the circumferential surface of the inner tube. The wire winding machine for the stator core of the motor can enter a shaft hole of the stator core so that an enamelled wire can be wound around a framework of the stator core.

The invention relates to the field of electronic materials and devices, and discloses a heat treatment furnace and a process for performing heat treatment on an amorphous transformer core by using the heat treatment furnace. The heat treatment furnace consists of a heat treatment furnace heating chamber, a heat treatment furnace vacuum chamber, a heating temperature control device, a magnetizing device, an object stage, a nitrogen bottle, a vacuum pump and a pressure gauge. The process for performing the heat treatment on the amorphous transformer core comprises three stages of temperature rising, temperature preservation and temperature drop, wherein a longitudinal magnetic field is added to the stages of the temperature preservation and the temperature drop. The heat treatment process can crystallize the transformer core appropriately to generate a nano-crystal phase and release the mechanical stress generated in the process of winding so as to obtain excellent magnetic performance, and effectively reduce the loss of the amorphous transformer core and improve the magnetic flux.

The invention relates to a permanentmagnet magnetic filter with high field intensity, and is characterized in that the magnetic filter comprises a plurality of permanentmagnet rings (8) and a main magnetic system (25), wherein the permanentmagnet rings (8) are connected in series on a coaxial-line, and the main magnetic system (25) is composed of high permeability yoke pieces (9) extrudedbetween every two permanentmagnet rings mutually overlapped; the inner ring cavity of each permanentmagnet ring (8) is used as a sorting space, and the magnetic rings on both sides of the same yoke piece (9) have the same polarity; and the outer ring faces surrounding the permanentmagnet rings are armed by a plurality of fan-shaped magnetic steel pieces to form auxiliary magnetic poles (26), and every magnetic ring is extruded by the upper, the lower and the outer faces so as to improve the magnetic flux of the sorting space, thereby gaining high magnetic-field intensity. As the inner ring cavity of each permanentmagnet ring is used as the sorting space and the closure magnetic system is formed by the trilateral homopolar extrusion technology in the design of the magnetic system, the magnetic-field intensity on the central axis of the sorting cavity can be ensured to be 1.3T.

The invention discloses a security monitoring system of a coach bus, comprising a camera, a digital signal processing module, a voice prompt module, a storage module, a wireless data transmitting and receiving module and a data transmission interface, wherein the camera is internally provided with an image sensing module. The camera is connected with the data signal processing module to transformimage information searched through the image sensing module into a digital signal through the data signal processing module for counting, and the counted result is stored in the storage module in real time and also transmitted to the voice prompt module through a signal so that the voice prompt module broadcasts passenger carrying conditions in the coach bus in real time or gives an overloading alarm; and the storage module not only can transmit the data information of the passenger capacity in the coach bus to the remote monitoring end by connecting the wireless data transmitting and receiving module, but also can educe the recorded information and the data out of the system or access the recorded information and the data into other control systems and devices by connecting the data transmission interface. In addition, in the system, metal sensors are installed at both sides of the door of the coach bus as required.

The invention provides an enhanced wireless charging system, which comprises a wireless emitting part, at least one relay part, and a wireless receiving part, wherein the wireless emitting part comprises a first ferrite and at least one emitting coil, and the emitting coil is connected with a signal source; the relay part comprises a relay coil and a circuit part, and two ends of the relay coil and two ends of the circuit part form a return circuit; and the wireless receiving part comprises a receiving coil and a second ferrite. According to the system, a first coil is powered on to produce a first magnetic flow passing through the relay coil; the relay coil produces a first induced current; the circuit part conducts charging and discharging, so as to allow the relay coil to produce a second magnetic flux; and the second magnetic flux passes through the receiving coil, so that the receiving coil obtains energy to charge a battery. Through the adoption of the system, the relay coil and a capacitor are introduced, the charging distance increasing can be realized through the increment of the magnetic flow of the receiving coil; the ferrite is thinner to save space so as to realize the application of thinner mobile phones and other terminals; and additionally, a control part is introduced, and the relay coil or the emitting coil is increased, so as to realize charging at free position.

The invention provides a permanent-magnet rotating machine. A cirumferential of a rotor comprises a first curve part and a second curve part in different curvature radius. A first magnet holding hole for holding a first permanent magnet and a second magnet holding hole for holding a second permanent magnet are arranged on a main pole part. An outer wall and an inner wall of the first magnet holding hole are formed into an arc at the center of a center point. An outer wall and an inner wanll of the second magnet holding hole are formed into an arc at the center of a center point different from the center point. The magnetic orientation of the first permanent magnet (the second permanent magnet) converges to a central orientation center at the center, and converges to an end orientation center farther than central orientation center at the end.

The invention provides a dual-rotor axial disk-type permanent magnet motor. A dual-motor and intermediate stator mode is adopted in structural layout, and magnetic flow is axial in direction; dual rotors output rotation speed and torque through a rotating shaft connected with the dual rotors, and permanent magnets arrayed in a trapezoid halbach form are arranged on inner sides of the rotors. The motor stator is designed in a non-yoke structure and adopts a multi-tooth combination and is fixed on a main case; the main case is in topology design, vent holes are arranged in the surface of the main case, and passive heat dissipation of the motor is facilitated; the dual-rotor axial disk-type permanent magnet motor has the advantages of small size, light weight and high power-to-weight ratio and is applicable to equipment of electric and hybrid cars, aircrafts and the like. The invention further relates to a non-rotor core structure design, and the power-to-weight ratio of the motor is further increased.

The invention relates to a trapezoid pole shoe sleeve type magnetic fluid seal device comprising a shaft, a shell, a left pole shoe ring, a right pole shoe ring, an upper permanent magnet ring, a lower permanent magnet ring and a trapezoid sleeve. The inner circular face of the left pole shoe ring and the inner circular face of the right pole shoe ring are provided with pole teeth III. The upper permanent magnet ring is arranged on the inner wall of the shell. The trapezoid sleeve is arranged on the shaft in a sleeving manner. The outer circular face of the trapezoid sleeve corresponds to theupper permanent magnet ring. A gap exists between the outer circular face of the trapezoid sleeve and the inner circular face of the upper permanent magnet ring. A groove I is formed in the outer circular face of the trapezoid sleeve. The lower permanent magnet ring is arranged in the groove I. The left end face of the trapezoid sleeve is an inclined annular face I. The right end face of the trapezoid sleeve is an inclined annular face II. The inclined annular face I is provided with pole teeth I. The inclined annular face II is provided with pole teeth II. The trapezoid pole shoe sleeve typemagnetic fluid seal device aims to solve the difficult problem that an existing seal device is poor in pressure resistance.

The invention provides a loudspeaker. The loudspeaker comprises a main magnet part, a vibrating system driven by the main magnet part, and a casing used for accommodating the main magnet part and the vibrating system, wherein the main magnet part comprises a first magnetic steel, a first pole core and a second magnetic steel which are sequentially arranged in a superposed manner, and the like poles of the first magnetic steel and the second magnetic steel are opposite to each other; the vibrating system comprises a first vibrating diaphragm fixed to the casing, a first voice coil connected with the first vibrating diaphragm, a second vibrating diaphragm fixed to the casing, and a second voice coil connected with the second vibrating diaphragm; the first vibrating diaphragm and the second vibrating diaphragm are opposite to each other and are arranged in a spaced manner; the main magnet part is arranged between the first vibrating diaphragm and the second vibrating diaphragm and is fixed to the casing; the first voice coil surrounds the main magnet part in a spaced manner, so as to drive the first vibrating diaphragm to vibrate and produce sounds; and the second voice coil surrounds the main magnet part in a spaced manner, so as to drive the second vibrating diaphragm to vibrate and produce sounds.

The invention is proposed to a assembled magnetic substance structure, especially relating to a assembled magnetic substance structure with local strengthened magnetic intensity and concentrated distribution magnetic line. Said invention comprises a magnetic block and a connecting piece, which is characterized in that the magnetic block is selected as a rotary magnetic block with two end surfaces with different size; said connecting piece is selected as a geometric element with extended ends in even number; and the bigger end surface of said magnetic block is connected to the extended ends of said connecting element.

The invention provides a production method of a nickel target and a nickel target component. The production method of the nickel target comprises the following steps of providing a nickel ingot; performing hot forging on the nickel ingot to form a first nickel target blank; performing first heat treatment on the first nickel target blank to form a second nickel target blank, wherein the temperature of the first heat treatment is 450-550 DEG C, and the temperature is maintained for 1-2 hours; after the first heat treatment, performing hot rolling on the second nickel target blank to form a third nickel target blank; performing second heat treatment on the third nickel target blank to form a fourth nickel target blank, wherein the temperature of the second heat treatment is 300-500 DEG C, and the temperature is maintained for 1-2 hours; after the second heat treatment, performing cold rolling on the fourth nickel target blank to form a fifth nickel target blank; performing third heat treatment on the fifth nickel target blank to form the nickel target, wherein the temperature of the third heat treatment is 200-300 DEG C, and the temperature is maintained for 1-2 hours. By adopting the technical scheme, the produced nickel target has relatively uniform internal organization and good magnetic property.

The invention provides a magnetic-control brake, which is applied to a vehicle. The magnetic-control brake comprises a metal brake disc, wherein through holes are uniformly and circumferentially distributed on the brake disc; soft magnets are arranged in the through holes; insulators are arranged outside the soft magnets and inside the through holes for insulation; and a pair of coils is respectively arranged on two sides of circumferences of the through holes and generates a magnetic field orthogonal to the brake disc during energization. The magnetic-control brake provided by the invention has the advantages of stableness, no vibration, brake noise and friction loss, and longer service life.

The invention provides an energy-saving effective permanent magnetic brushless rotation motor which starts and runs stably and has low cost. The motor owns two air gap magnetic fields at the magnetic poles of two ends; the deformed rotor permanent magnet or stator electromagnet leads the rotor magnetic pole (or stator magnetic pole) to be staggered by a certain of pole distance at the air gap magnetic fields of two ends; furthermore, the air gap magnetic field at one end of the motor is led to be less than the air gap magnetic field at the other end by technical means, thus leading the motor to keep directional rotation without a starting device. The rotor magnetic poles are intermittently arranged in pairs according to N, S and the like. The stator can be a conversion-typed stator and a commutation-typed stator; all coils at one end of the conversion-typed stator have the same polarity (N-pole or S-pole; the polarity of the coils at the other end are all S-pole or N-pole); the polarity of the magnetic pole of the commutation-typed stator coil is intermittently arranged in pairs according to N, S and the like; and the magnetic pole of the alternating current commutation-typed stator is intermittently arranged in pairs according to N, N, S, S and the like. The quantity of the rotor magnetic poles and the stator magnetic poles is configured according to the proportion of 1:1 or 1:2 or 2:3.

The invention discloses a permanent magnet change length magnetorheological fluid and friction composite soft landing device. The permanent magnet change length magnetorheological fluid and friction composite soft landing device comprises a shell, a transmission shaft and a coiling block. The shell comprises a horizontal outer cylinder. A left side cover and a right side cover are arranged at the two ends of the outer cylinder respectively. The transmission shaft is arranged in the outer cylinder, and the axis of the transmission shaft coincides with the axis of the outer cylinder. The left end and the right end of the transmission shaft stretch out of the left side cover and the right side cover respectively and are fixedly connected with the left side cover and the right side cover through bearings. The coiling block is arranged at the left end of the transmission shaft in a sleeving manner and fixedly connected with the transmission shaft, and an escape rope is wound on the coiling block. A magnetorheological brake part and a friction brake part are arranged in the shell. The permanent magnet change length magnetorheological fluid and friction composite soft landing device is simple in structure, energy does not need to be additionally added, the landing distance can be controlled, and safety and the comfort level are high.

An electromagnetic valve type urea solution injector relates to an injector, and comprises an electromagnetic valve type injecting body, and an injecting nozzle, wherein the electromagnetic valve type injecting body and the injecting nozzle are connected into a whole through an injecting nozzle connecting rod; the injecting nozzle comprises a valve seat, a sealing steel ball mounted at a valve, a spraying orifice plate provided with a spraying orifice and mounted at the front end of the valve, and a step hole is formed between the front end part of the valve seat and the spraying orifice plate to form a turbulent cavity A ; a heat-insulating sleeve is arranged on an excircle at the front end of the valve seat for preventing heat energy of a tail gas discharge pipe from passing into the injecting nozzle; and a single-orifice atomization structure is arranged in the injecting nozzle. The electromagnetic valve type urea solution injector can work in high-temperature and high-speed gas with long-term stability and very high reliability, has low possibility of blockage, and better solves the problem that the spraying orifice can be blocked up by urea crystals. The invention also has the advantages of low manufacturing cost, short maintenance time of the product, reasonable structure and convenience in installation, etc.

A rotating electrical machine for realizing the longer life of a belt by suppressing an increase in the inertia of a rotator, and realizing high output by increasing field electromotive force is achieved. In the rotating electrical machine, first and second magnetic induction members (30, 35) are provided on first and second valley portions (25, 26) in such a manner that the members are fit into first and second holding grooves (27, 28) extendedly provided in an axis direction in opposed portions of outer diameter sides of the inner wall surfaces of the first and second valley portions (25, 26). First and second eternal magnets (32, 37) magnetized and oriented in a direction opposite to that of a magnetic field (41) generated by a field magnetic coil (14) are fit to and held at fitting grooves of the first and second magnetic induction members (30, 35) in such a manner that the magnets are opposed to the inner periphery surfaces of the leading end sides of second and first nail-like magnetic pole portions (24, 20) with a predetermined gap therebetween.

The invention discloses a set of motor equipment, and aims to provide a permanent magnet motor capable of effectively eliminating a slot effect. The permanent magnet motor adopts the structure that a rotor of the permanent magnet motor is a surface-mount permanent magnet, a stator of the permanent magnet motor adopts a split structure, boot tips are arranged at tooth boots of stator splits, the boot tips of two adjacent stator splits in the circumferential direction are closely contacted with each other and barely have clearance therebetween, notches are formed at the contact parts of the boot tips of the stator tooth boots of the permanent magnet motor, the permanent magnet takes the shape of an eccentric equant tile, the permanent magnet is segmented in the axial direction, the segments of the permanent magnet are placed at intervals, the homopolar permanent magnet segments are sequentially arranged in a malposed manner in the same circumferential direction, and the total malposition distance is the width of a slot. In the permanent-magnet motor provided by the invention, a specific structural combination is adopted to effectively eliminate the slot effect of the permanent magnet motor. The permanent magnet motor provided by the invention has simple manufacturing technology and lower manufacturing cost.

The invention provides an efficient reluctance type multi-functional motor with axial and radial three-dimensional mixed magnetic circuits in axial split phases. In the motor, the axial split phases are adopted, and each phase is provided with the axial and radial three-dimensional mixed magnetic circuits. The motor comprises rotors and stators, wherein the rotors and the stators are provided with n salient poles, and n is a positive integer which is more than 5; the stator of each phase is of an independent stator disk structure with the n salient poles and is provided with an exciting winding; the rotor of each phase is formed by the left and right rotor disks with the n salient poles and a cylinder with the n salient poles in the middle; two ends of the cylinder are fixedly connected with the left and right rotor disks, and salient pole angular elongations between the rotor disks and each pole of the cylinder are respectively aligned at groove angular elongations in an axial direction; and the rotor and the stator of each phase are connected in series in an axial direction. The use ratio of the magnetic circuit is improved to greatly strengthen unit volume effect of the motor; and the motor has the advantages of small torque pulsation, low cost and the like.

The invention provides a mobile terminal and an antenna controlling method. The mobile terminal comprises a first shell and a second shell which have a folded or unfolded state; wherein a grounded first radiation arm which is electrically isolated from the first shell is arranged at one side edge of the first shell; the first shell is provided with a first electrical contact and a second electrical contact; the first electrical contact is electrically connected with the first radiation arm; the second electrical contact is electrically connected a grounded first signal source; a grounded second radiation arm which is electrically isolated from the second shell is arranged at one side edge of the second shell; the second shell is provided with a third electrical contact and a grounded fourth electrical contact; the third electrical contact is electrically connected with the second radiation arm; and when the first shell and the second shell are in the folded state, the first electricalcontact is in contact with the fourth electrical contact to conduct and the second electrical contact is in contact with the third electrical contact to conduct. The mobile terminal provided by the invention can be better applied to the usage scenarios with high performance requirements for NFC (Near Field Communication) antennas when the mobile terminal is in the folded state.

The invention relates to a radial sleeve type labyrinth type magnetic fluid sealing device. The radial sleeve type labyrinth type magnetic fluid sealing device comprises a shaft, a shell, a left poleshoe ring, a right pole shoe ring, a sleeve and a permanent magnet ring. The left pole shoe ring and the right pole shoe ring are arranged in the shell in a spaced mode; the shaft is sleeved with thesleeve located between the left pole shoe ring and the right pole shoe ring; the permanent magnet ring is arranged in the shell and located between the left pole shoe ring and the right pole shoe ring; a gap is reserved between the outer circular face of the sleeve and the inner circle face of the permanent magnet ring; pole teeth I are arranged on the right end face of the left pole shoe ring atintervals; pole teeth II are arranged on the left end face of the sleeve at intervals, and pole teeth III are arranged on the right end face of the sleeve at intervals; and pole teeth IV are arrangedon the left end face of the right pole shoe ring at intervals. The radial sleeve type labyrinth type magnetic fluid sealing device is used for solving the problem of low pressure-resistant performanceof an existing sealing device, and the sealing technology is successfully applied to the fields such as the high-speed and heavy-load field.

The invention relates to an eddy current retarder device based on the magnetorheological effect. The eddy current retarder device comprises rotor discs, a stator assembly, a transmission shaft and magnetorheological fluid. The stator assembly comprises a bearing sleeve, stator shells and the like and is located in the middle, the two rotor discs are placed in the stator shells on the two sides of the stator assembly respectively, and gaps between the shells and the rotor discs are filled with the magnetorheological fluid. Eight excitation devices are respectively fixed to the inner side shell of the stator shells on the two sides. Through the structure, air gaps between rotors and a stator are replaced by the magnetorheological fluid with high magnetic permeability and low electrical conductivity, and therefore magnetic circuit magnetic resistance is reduced; meanwhile, under the magnetic field effect, the magnetorheological fluid is converted from Newtonian fluid with low viscosity into Bingham fluid with high shear yield stress. In the brake process, the brake torque generated by eddy currents and the brake torque generated by the magnetorheological fluid act at the same time. The eddy current retarder device with the structure has the advantages of being capable of saving energy and electricity, small in coil heating amount, large in brake torque, and good in brake torque controllability and low-speed performance.

The invention provides a permanent-magnet rotating machine. A cirumferential of a rotor comprises a first curve part and a second curve part in different curvature radius. A first magnet holding hole for holding a first permanent magnet and a second magnet holding hole for holding a second permanent magnet are arranged on a main pole part. An outer wall and an inner wall of the first magnet holding hole are formed into an arc at the center of a center point. An outer wall and an inner wanll of the second magnet holding hole are formed into an arc at the center of a center point different fromthe center point. The magnetic orientation of the first permanent magnet (the second permanent magnet) converges to a central orientation center at the center, and converges to an end orientation center farther than central orientation center at the end.

The invention discloses an enhanced transmitting coil applicable to a power supply system of an electric automobile. The enhanced transmitting coil comprises a plurality of layers of concentrical spiral planar coils which are sequentially arranged from inside to outside, wherein the spiral planar coils are covered with an electromagnetic radiation shielding layer. A magnetic core is arranged at the center of the innermost-layer spiral planar coils and is the same as the spiral planar coils in shape. The adjacent layers of spiral planar coils are respectively formed by winding insulation leads in the opposite directions. The head ends of all spiral planar coils are connected, and the tail ends of all spiral planar coils are connected. The adjacent layers of spiral planar coils are reversely connected in parallel and are opposite in current direction during working so that a transmitting electromagnetic field can be enhanced. The electromagnetic radiation shielding layer can be used for constraining one-way transmission of the magnetic field produced by the transmitting coils and plays the combined effect with the spiral planar coils reversely connected in parallel, the transmitting magnetic field of the transmitting coils can be enhanced, accordingly a transmission distance is increased, and transmission efficiency is improved.

A permanent magnet rotor includes permanent magnets arranged radially (5) and circularly (9) on a rotor to control the magnetic flux generated by the permanent magnets arranged radially to be approximately twice as much the magnetic flux generated by permanent magnets arranged circularly thereon.

The invention provides a magnetic rod antenna. The magnetic rod antenna comprises a magnetic rod and a wire, wherein a plurality of parts of the wire are sequentially wound around the magnetic rod to form a plurality of coils in an alternately sparse and dense manner, and the magnetic field intensity of the plurality of coils laminated on division magnetic fields of respective cross section of the same magnetic rod is higher than the magnetic field intensity of the total magnetic field of the coil formed by uniformly winding the existing wire around the magnetic rod. The magnetic rod antenna provided by the invention is longer in signal transmission distance, and is not susceptible to the interference of an outside environment; and moreover, with the magnetic rod antenna provided by the invention, the magnetic flux of the antenna can be improved.