501 results about "Magnetic poles" patented technology

The invention discloses a half-open type thrust magnetic levitation bearing. The bearing comprises a first magnetic ring, a second magnetic ring and a third magnetic ring, wherein the first magnetic ring, the second magnetic ring and the third magnetic ring are arranged in annular and laminating manners so as to form an annular magnetic pole; the magnetic pole of each of the magnetic rings is different from that of the adjacent magnetic ring; a first winding and a second winding of the annular magnetic pole are wound according to a predetermined half-open way, the lower part of the middle magnetic pole is recessed inwards so as to generate a winding space which meets predetermined conditions; and the magnetic pole arranged at the upper end extends, and thus, a complete circle of magnetic pole is formed after splicing. Based on the bearing, continuity and consistency of magnetic field strength of the magnetic poles of the half-opened axial thrust bearing can be basically reserved, and the half-open type thrust magnetic levitation bearing can be applied to high-speed rotation machines; and moreover, a more flexible mounting way can be obtained, particularly to large-size rotation machines.

Proposed is a micropump. The micropump includes a head portion including a first and second movement guides and a first tip, and includes a body portion having at least a portion thereof accommodated in the head portion, the body portion including a core, a winding body, a first permanent magnet, a second permanent magnet, a first fixing guide, and a second fixing guide. The first movement guide and the first fixing guide are famed so as to correspond to each other, the second movement guide and the second fixing guide are formed so as to correspond to each other, a pole of the first permanent magnet faces or opposes a lower end contact surface of the core, and a facing direction of a pole of the second permanent magnet is same as a facing direction of the first permanent magnet.

This invention provides an axial-radial composite flux permanent magnet motor, relating to the field of motor technology. It includes a rotor assembly and a stator assembly. The rotor assembly includes multiple permanent magnets uniformly arranged circumferentially. Each permanent magnet includes an integrally formed axial pole segment, a first transition segment, and a radial pole segment. The stator assembly includes a stator core and stator windings. The stator core includes stator teeth uniformly arranged circumferentially. Each stator tooth includes an integrally formed axial tooth body segment, a second transition segment, and a radial tooth body segment, corresponding to the axial pole segment, the first transition segment, and the radial pole segment, respectively. The stator windings are wound on the corresponding axial tooth body segments. This invention not only reduces magnetic energy loss and improves magnetic field coupling efficiency but also increases the effective coupling area between the permanent magnets and the stator teeth, improving the motor's torque density and power density. Furthermore, it ensures stable operation and has a wide range of applications.

The application relates to the technical field of motors, in particular to a rotor magnetic ring and a hollow cup motor. The rotor magnetic ring is a polar anisotropic magnetic ring, which comprises at least two pairs of magnetic poles, each pair of the magnetic poles is oppositely arranged on the two sides of the rotor magnetic ring, and the magnetic properties of adjacent magnetic poles are opposite; each magnetic pole comprises at least two magnetic force units arranged along the circumference of the magnetic pole in sequence, the magnetization directions of adjacent magnetic force units have a deflection angle beta, and the magnetization directions of all the magnetic force units are arranged along the circumference with the deflection angle beta, so that the magnetic field intensity on the outer side of the rotor magnetic ring is greater than that on the inner side, the magnetic field energy is concentrated in an effective working area, and the overall working performance of the hollow cup motor is improved.

A rotary alternating stroke drive actuator (1) comprises: a shaft section (15) to one end section (152) of which a magnet (32) is attached and to the other end section (154) of which a movable body (10) is connected; a drive unit (4) comprising: a core assembly (40) with a plurality of magnetic poles opposite an outer circumference of the magnet (32), wherein a coil (44) is provided, as well as a bottom cover (50) and a top cover (60) arranged to enclose the core assembly (40) axially and to support the shaft section (15) which is inserted into a bearing (24, 26) which is contained in the bottom cover (50) and the top cover (60), respectively, wherein the shaft section (15) is rotatably supported, the other end section (154) of the shaft section (15) projecting from the bottom cover (50); and a basic part (21) comprising: a first wall section (211),The base part (21) fixes the drive unit (4) in a state in which the other end section (154) of the shaft section (15) passes through the first wall section (211), and a second wall section (212) is spaced apart from and opposite the first wall section (211), with the movable body (10) being arranged between the first wall section (211) and the second wall section (212). The base part (21) is designed such that it supports the shaft section (15) and a projecting shaft section (14) in such a way that the shaft section (15) and the projecting shaft section (14) can perform a reciprocating rotation, with the projecting shaft section (14) projecting from the movable body (10) and passing through a wall bearing (22) of the second wall section (212). The drive unit (4) comprises a pair of preload springs (82, 84),which are each arranged on the outer circumference of the shaft section (15) between the magnet (32) and the corresponding bearing (24, 26) and exert a preload force on the respective bearing (24, 26) as well as on the wall bearing (22).

Motor for use in a washing machine, comprising: a stator (100), comprising: a core (108) made of magnetically permeable material, comprising an annular ring section (104) having an inner diameter of 120 mm to 250 mm and a radial width (134) of 5 mm to 15 mm, 27 radially extending poles (102) spaced apart around the outer circumference of the annular ring section (104), the poles (102) extending outwards from the annular ring by a distance of 15 mm to 40 mm, three phase windings, each winding comprising a plurality of coils arranged on one third of the pole cores (109), the windings on the pole cores (109) being arranged such that each pole core (109) is assigned only one winding, which is different from the winding assigned to each of two immediately adjacent pole cores (109). is,and the two immediately adjacent pole cores (109) are assigned to different windings, an insulator that insulates the pole cores from the windings, a rotor (36) that is concentric to the stator (100), with a permanent magnet ring (38) outside the stator (100) and rotor poles that point towards the ends of the stator poles (102), wherein the ratio of rotor poles to stator poles (102) is 4:3.

A magnetic device for magnetically coupling to a ferromagnetic body, comprises a housing having a central bore. A plurality of pole sectors arranged within an envelope of the central bore and forming a workpiece contact interface of the magnetic device, each of the plurality of pole sectors comprising a plurality of spaced-apart pole portions arranged at respective distances, wherein a recess of a plurality of recesses separates each pole portion of the plurality of pole portions, wherein a first sector forms a first pole of the magnetic device and a second sector forms a second pole of the magnetic device. A first permanent magnet. A second permanent being moveable relative to the first permanent magnet. And, an actuator operatively coupled to the at least one second permanent magnet to move the at least one second permanent magnet relative to the at least one first permanent magnet.

The utility model discloses an electromagnetic damping vibration isolation device belongs to vibration control technical field. The utility model solves the technical problem of the magnetic field intensity fixed of electromagnetic damping vibration isolation device and coil heating easily leads to performance attenuation. The utility model discloses an electromagnetic damping vibration isolation device, including coil subassembly and conductor block. Coil subassembly includes coil and coil clamp. Coil clamp is held in the outer periphery of coil. Coil clamp includes clamp body and water cooling pipeline. The heat dissipation block is equipped on the clamp body, and the heat dissipation block extends along the radial direction of coil, and multiple heat dissipation blocks are evenly arranged around coil. The water cooling pipeline is surrounded in the clamp body. The conductor block is located between at least two groups of coil subassembly, and the magnetic pole of every two groups of coil subassembly is opposite, thereby making the conductor block can be subjected to electromagnetic damping force when producing vibration. The utility model discloses a vibration isolation device can cover the vibration control demand of multiple frequency bands, avoids coil overheat aging, improves the life of vibration isolation device.

This utility model discloses a fluid magnetization device and a descaling equipment. The fluid magnetization device includes a grid support and a plurality of magnets mounted on the grid support. The plurality of magnets are arranged along a first direction and a second direction, the first direction being perpendicular to the second direction. Along the first direction, adjacent magnets are arranged with opposite magnetic poles facing each other. Furthermore, along the first direction, the grid support has a main fluid channel between adjacent magnets; along the second direction, the grid support has an auxiliary fluid channel between adjacent magnets. This utility model can improve the magnetization effect and increase the utilization rate of the magnets.

Acoustic output device, characterized in that it comprises: a housing in which an inner chamber is formed; a support structure that allows the housing to be held in a position on the ear without blocking the external ear canal; a first loudspeaker which is accommodated in the inner chamber, the first loudspeaker comprising a first magnet and a first diaphragm which are spaced apart from each other in a direction of vibration of the first diaphragm; and a second loudspeaker which is incorporated in the inner cannon, the second loudspeaker comprising a second magnet and a second diaphragm spaced apart from each other in a direction of vibration of the second diaphragm; wherein the first magnet and the second magnet are spaced apart from each other in the direction of oscillation of the first membrane, and wherein the first magnet and the second magnet have the same magnetic poles which are arranged opposite each other.

This disclosure provides a method for fabricating a multipole magnet. The method includes: obtaining the effective aperture of the multipole magnet according to the target application of the device; determining the coordinates of the vertex corner of the isosceles triangle in the target coordinate system based on the effective aperture of the multipole magnet and an isosceles triangle model, wherein the multipole magnet pole head includes three nodes constituting the isosceles triangle; determining the coordinates of the two base corners of the isosceles triangle based on the vertex corner coordinates, the effective aperture of the multipole magnet, and the isosceles triangle model; designing key points on the surface of the multipole magnet based on the corner coordinates of the isosceles triangle; optimizing the key points on the surface of the multipole magnet and generating a magnetic pole curve based on the optimized key points; and fabricating the multipole magnet based on the magnetic pole curve.

A rotary alternating stroke drive actuator (1) comprises: a mounting surface section (50) connected to a mounting target section (211); a rotatable shaft section (15) projecting from a predetermined position of the mounting surface section (50) and to which a movable object is connected;and a core (400) comprising: a pair of rod-shaped magnetic materials (412a, 412b) with magnetic poles at the distal end regions, the magnetic poles being opposite an outer circumference of a magnet (32), and a frame-shaped magnetic material (42) connected to the base end sections of the pair of rod-shaped magnetic materials (412a, 412b) forming a magnetic path enclosing the magnet (32) and the magnetic poles, the predetermined position being an eccentric position relative to the center in the direction of a corner region (510) on the mounting surface section (50), and the pair of rod-shaped magnetic materials (412a, 412b) being arranged symmetrically with respect to an inclined line extending in this direction.

A magnetic modulator includes: a magnetic pole piece; a support portion disposed in an axial direction of the magnetic pole piece to rotationally support the magnetic pole piece; and a resin portion that integrates the magnetic pole piece and the support portion, in which at least one of both end surfaces of the magnetic pole piece in the axial direction is exposed.

Systems, apparatuses, methods, and techniques are described for providing improved loudspeaker performance by utilizing coupled loudspeaker motors. According to an example method, a first baseplate of a first loudspeaker motor is coupled to a second baseplate of a second loudspeaker motor such that the first loudspeaker motor and the second loudspeaker motor are oriented in opposing directions. The example method further includes repelling, based on a first magnetic polarity of the first baseplate, a first magnetic flux leakage associated with the second baseplate of the second loudspeaker motor such that the first magnetic flux leakage is redirected towards the second loudspeaker motor. The example method further includes repelling, based on a second magnetic polarity of the second baseplate, a second magnetic flux leakage associated with the first baseplate of the first loudspeaker motor such that the second magnetic flux leakage is redirected towards the first loudspeaker motor.

The application belongs to the field of material grabbing devices of optical storage equipment, and more particularly to the field of optical disc taking and placing, and discloses an optical disc taking and placing device and method, which comprises a supporting cylinder, a through hole is formed in the bottom of the supporting cylinder, a shaft rod is fixed in the through hole, a permanent magnet claw arm is rotatably connected to the outer side of the shaft rod, the permanent magnet claw arm penetrates through the through hole and is connected with a hook block, a fixed ring is fixed to the bottom of the iron core, a hydraulic mechanism is fixed in the bottom of the supporting cylinder, the hydraulic mechanism penetrates through the fixed ring and is connected with the permanent magnet claw arm, a pressing and fixing mechanism is fixed to the bottom of the supporting cylinder, and the pressing and fixing mechanism is connected with the hydraulic mechanism through a first connecting pipeline. The optical disc taking and placing device controls the action of the three permanent magnet claw arms through the magnetic pole interaction of the permanent magnet and the electromagnet, has the advantages of no friction loss and high control precision compared with the traditional mechanical driving, and solves the reliability problem caused by mechanical wear in the prior art.

A system for magnetic reorientation is provided to secure and align devices during wireless charging. The system comprises a first device and a second device. The first device includes a power transfer coil configured to transfer power inductively between the first device and the second device; and one or more dock magnets configured to align and secure the second device to the first device during power transfer, wherein the one or more dock magnets are configured to provide reorientation of magnetic polarity based on a magnetic polarity orientation of one or more device magnets located in the second device. The first device is compatible with a plurality of device types including a first device type having a first magnet orientation and a second device type having a second magnet orientation, and the one or more dock magnets are configured to reorient based on the magnet orientation of the first device.

The application discloses a sound production monomer and an electronic device. The sound production monomer comprises a magnetic circuit system, a vibration system and a shell. The magnetic circuit system comprises a magnetic yoke and a magnet assembly arranged on the magnetic yoke. The magnet assembly forms a magnetic gap. The magnet assembly comprises a first magnet, a second magnet, a third magnet and a fourth magnet. The first magnet and the third magnet are magnetized along a second direction and the magnetization directions are opposite. The second magnet and the fourth magnet are magnetized along a first direction. The first direction is perpendicular to the second direction. The polarity of the magnetic pole of the second magnet facing the first magnet is the same as the polarity of the magnetic pole of the first magnet close to the magnetic gap. The polarity of the magnetic pole of the fourth magnet facing the third magnet is the same as the polarity of the magnetic pole of the third magnet close to the magnetic gap, so that the magnet assembly forms a magnetic field enhancement side facing the magnetic gap. The vibration system comprises a diaphragm and a flat voice coil. The magnet assembly forms a magnetic field enhancement side facing the magnetic gap, which improves the magnetic field driving force and the acoustic performance of the loudspeaker.

The application discloses an inner wall magnetorheological polishing device, which is used for polishing the inner wall of a polishing piece and characterized by comprising a base, a polishing cavity arranged on the base, a first magnetic field generator arranged around the periphery of the polishing cavity, a polishing rotor arranged in the polishing cavity, a driving part arranged on the base and used for driving the polishing rotor to rotate, a second magnetic field generator arranged in the polishing rotor and opposite to the magnetic pole of the first magnetic field generator, and an axis of the polishing rotor and a rotation axis of the polishing rotor not coinciding with each other, wherein the polishing piece is fixed in the polishing cavity, a magnetorheological polishing liquid is arranged between the inner wall of the polishing piece and the polishing rotor, a partition plate is fixed in the polishing cavity, one end of the partition plate is in abutment with the inner wall of the polishing piece, and the other end of the partition plate is inserted into the polishing rotor. The application has the advantages that the concentration of abrasive particles acting on the polishing piece is greatly improved, the number of effective polishing abrasive particles is increased, and the polishing efficiency is improved.

The motion detection device (5) includes a first support (51), a second support (52) that moves relative to the first support, a power generation sensor (100) disposed on the first support, and a magnetic field generating source (400) supported on the second support. The power generation sensor includes a magnetic wire (110), a coil (120), and a magnetic flux conducting plate (130, 131). The magnetic flux conducting plate includes an axially orthogonal portion and an axially parallel portion, and has a wire arrangement portion that fixes the axially orthogonal portion and both ends of the magnetic wire. The power generation sensor is configured such that the side opposite to the magnetic wire is set as the detection area (140) relative to the axially parallel portion. The magnetic field generating source has multiple magnetic poles. Magnetic poles of different polarities enter the detection area sequentially along a track (30) parallel to the axis of the magnetic wire and are opposite to the power generation sensor. The magnetic flux direction of each magnetic pole is perpendicular to its direction of movement and is the direction that intersects with the magnetic wire.

The application relates to the field of linear motors, and provides a single-side coreless linear motor and a linear motor module. The linear motor comprises a stator assembly and a mover assembly which are oppositely arranged along the height direction of the motor. The stator assembly comprises magnetic steel sheets and a magnetic yoke, and the multiple magnetic steel sheets are uniformly fixed to the top surface of the magnetic yoke. The mover assembly comprises a coil holder, a coil and a magnetic pole plate. The coil is embedded in the coil holder, the magnetic pole plate is clamped on the stepped clamping groove of the coil holder, the bottom surface of the coil holder close to the coil is arranged adjacent to the magnetic steel sheets, and a non-contact gap is formed between the surface of the coil and the magnetic steel sheets. On the basis of the coreless design of the motor, the motor structure is further optimized, the layout of the coil and the permanent magnet is adjusted, the motor structure of the ultrathin single-side design is realized, the volume and the mass of the motor are reduced, the installation and the maintenance of the motor are simplified, and the manufacturing cost is reduced.

A drive comprises salient-pole stator (1) and an armature (2) having equal number of uniformly distributed poles. Identical coils (3-1) and (3-2), connected in series or in parallel, are respectively arranged on poles 1-1 and 1-2 of stator (1) and form an alternating-current winding. Semiconductor component (4) is connected between one terminal of winding and AC power supply terminal (5-1), while another terminal of winding is connected to AC power supply terminal (5-2). The poles of stator and the armature are angularly displaced relative to each other so that, in initial position, the overlap area of their opposing pole surfaces is 0–20%.

The utility model discloses a kind of driving distance compensation device, optical zoom assembly and camera equipment, it is related to optical equipment technical field, wherein, driving distance compensation device includes driving structure and correction structure, driving structure includes step motor and ball screw, ball screw is set along the first direction extension, step motor is driven connection with the screw rod of ball screw, to drive screw rod rotation around the axis of first direction extension, ball nut of ball screw is set along the first direction activity, and for driving connection to be driven component, correction structure includes angle sensor and magnet, one of angle sensor and magnet is located screw rod, another fixed setting, to can occur relative rotation, angle sensor is used to detect the angle of magnet relative rotation, magnet has at least one magnetic pole group, two magnetic poles in magnetic pole group are set apart around the axis of first direction extension. So set, can solve the problem of step loss, improve the driving precision and driving speed of step motor.

The present application relates to the technical field of additive manufacturing, and particularly relates to a self-compensation printing head and method, an extrusion direct writing device and a working method. The printing head comprises a shell, a barrel, a screw and a self-compensation assembly; the lower part of the shell has a cavity, the barrel is rotatably installed in the cavity, and the screw is installed in the barrel for extruding material; the self-compensation assembly comprises an outer magnetic pole, an inner magnetic pole and a potentiometer, the outer magnetic pole is arranged on the inner wall of the cavity of the shell, the inner magnetic pole is arranged on the outer wall of the barrel and is arranged in the same polarity opposite to the outer magnetic pole, and the potentiometer is also installed on the barrel; the magnetic force of the outer magnetic pole and the inner magnetic pole makes the barrel at an initial angle, and when the material shear force increases, the magnetic force is overcome to drive the barrel and the potentiometer to rotate. According to the present application, the screw rotating speed can be automatically adjusted in real time according to the change of the material shear force, the stable control of the extrusion amount of different materials is realized, and the precision, quality and efficiency of multi-material direct writing forming are improved.

A developing device includes a developing container, a developing member, a supplying screw, a developer amount regulating portion, a magnet, and an inclined portion. An inclination starting point of the inclined portion is positioned below a point on an outer peripheral surface of the developing member where an absolute value of magnetic flux density of an upstream pole of the magnet becomes a maximum value, and above the regulating portion. The inclination starting point is positioned between the supplying screw and the developing member. An absolute value of maximum magnetic flux density of a regulating pole of the magnet is higher than the absolute value of the maximum magnetic flux density of the upstream. An absolute value of a maximum magnetic flux density of a downstream pole of the magnet is higher than the absolute value of the maximum magnetic flux density of the regulating pole.

The rotary reciprocating drive actuator of the present application has: a shaft portion that has a magnet fixed at one end portion side and has a movable object connected at the other end portion side; a drive unit that has a core assembly including a plurality of magnetic poles opposed to the outer periphery of the magnet and a coil arranged, and a bottom cover and a top cover arranged to sandwich the core assembly in the axial direction, and supports the shaft portion so as to be rotatable in the respective bearings, and the other end portion side of the shaft portion protrudes from the bottom cover; a base portion that has a first wall portion that fixes the drive unit in a state in which the other end portion side of the shaft portion is inserted, and a second wall portion that is arranged in opposition to the first wall portion and arranges the movable object between the first wall portion, and supports the protruding shaft portion provided to the movable object so as to be rotatable reciprocally with the shaft portion by inserting the protruding shaft portion in the wall bearing of the second wall portion, and the drive unit has a pair of pre-pressing springs arranged to the outer periphery of the shaft portion between the magnet and the respective bearings and applies pre-pressing to the respective bearings and the wall bearing.

An electric motor comprising a rotor having a rotational axis and a radial axis perpendicular to the rotational axis and a c-shaped stator core. The stator core comprises a back, a first arm and a second arm. Each of the first arm and the second arm extend from the back and comprising a pole face. The pole face of the first arm is spaced from the pole face of the second arm to define a slot opening. The stator core is mounted relative to the rotor such that an inner side of the back faces the rotor. The radial axis extends through the centre point of the slot opening and through the inner side. The inner side of the back is asymmetric with respect to the radial axis.

The invention relates to a sensor device (1) comprising a transducer (3) adapted to generate a magnetic field (MF), the sensor device (1) being configured to measure a beating gap (G) between a first refining disc (5) and a second refining disc (7) of a refiner arrangement (9) and to be mounted in the first refining disc (5), the sensor device (1) comprising a magnetic pole (13), a coil assembly (15) and a measuring head (11') configured to be set in a calibration position relative to the second refining disc (7) for calibration of the sensor device (1). The measuring head (11') comprises an outer end (10') made of a non-magnetic material configured to be positioned in abutment with the second refining disc (7) in a calibration sequence. The invention also relates to a method of calibrating said sensor device (1).

The utility model discloses built-in infrared electromagnetic double magnetic pole electromagnetic iron remover, include: combination bearing frame, a pair of circular heavy load circuit connector and a pair of iron remover metal protective shell, the utility model relates to ore mining auxiliary equipment technical field, and this iron remover adopts bipolar magnetic pole design, and cooperate infrared sensor, can automatic regulation power according to the iron content of the iron impurity in the lower running mineral, both guarantee the iron removal efficiency, and avoid energy waste, compared with traditional hard structure suspension, this equipment changes the flexible suspension of special design, but unlike the shortcoming of conventional flexible suspension easy to shake, its unique triangle suspension under the mode of putting down makes the iron remover put down to the specified height without obvious shaking, and the operation is more stable, and the iron removal is more efficient.