45results about How to "Strong resistance to demagnetization" patented technology

The invention provides a six-phase flux switching type permanent magnet motor which comprises stators, rotors and a rotating shaft, wherein each stator adopts a permanent magnet double salient structure, that is, the permanent magnet, the stator core and the armature winding are arranged on each stator, the stator core is assembled by an U-magnetic core and each permanent magnet embedded in the magnetic core, and the permanent magnets are of tangential alternate magnetization; the armature winding is of six-phase armature winding arranged on the stator, the six-phase armature winding adopts centralization coils, and the rotors are made of permeability magnetic material; the magnetizing directions of the permanent magnets are of the tangential of the stator circle, and the magnetizing directions of two adjacent permanent magnets are opposite to each other; the number of the armature coil and the stator groove is even number times of the phase number; and each phase 2n coils winding, and n coils are distributed at the two ends of the diameter of the stator circle respectively. And two three-phrase winding can conduct independent power supplying and generating.

The invention discloses a motor with stronger torque output ability and higher power density, which consists of stator (1) and rotor (4), wherein the rotor (4) lies in the interior or exterior of the stator (1); the stator (1) and rotor (4) are double-salient pole structures with the gathered winding (3) and permanent magnet (2) on the stator (1); the radial of second and fourth winding coils are faced with each gathered winding coil in the U-shaped magnetic iron groove of two adjacent stators (1); four winding coils connect front head to end sequently; the permanent magnet (2) is set between two adjacent U-shaped magnetic iron core.

The invention discloses a self-starting permanent magnet motor provided with composite material starting conducting bars, which belongs to the technical field of permanent magnet motors. A rotor of the permanent magnet motor has a stamping type structure; a permanent magnet is arranged on the inner side of a rotor core, N and S magnetic poles are arranged alternately; a permanent magnet rotor adopts a magnetic pole structure of a U type, V type or mixed type magnetic circuit; composite material rat cage starting conducting bars are uniformly distributed close to the surface of the rotor core; and the composite material rat cage starting conducting bars is made of two types of materials including brass and copper-iron alloy. The brass is positioned on a middle part between the bottom part of a rotor groove and the upper part of the rotor groove; two side parts of the upper part of the rotor groove are made of the copper-iron alloy; or the middle part of the rotor groove is made of the brass, while the two sides of the rotor groove are made of the copper-iron alloy. Two ends of each composite material starting conducting bar are shorted out outside the rotor core through a welded brass end ring. Through the adjustment of the structure sizes of the brass and the copper-iron alloy materials, the obtained permanent magnet motor has a small starting current multiple and strong demagnetization resistance, can be started smoothly, and is suitable for workplaces requiring long-time continuous operation.

The invention discloses a modularized flux switching permanent magnet (FSPM) motor, which is used for solving the problem of such a motor in which a permanent magnet is placed in a rotor. The motor comprises a stator and a rotor and adopts an inner rotor mode or an external rotor mode. The stator and the rotor are respectively a convexo-convex pole and slot structure. A magnetic module and a centralized armature winding are arranged on the stator; the magnetic module comprises one male concentrating flux iron core and one female concentrating flux iron core of the stator as well as a permanent magnet embedded in the stator; and the rotor is not provided with a permanent magnet and a winding. The motor has the beneficial effects that the structure is simple, compact and stable, and the volume is small; the windings are high in slot fullness, the resistance and the copper consumption are decreased and the efficiency is higher; the linear charge density, the torque output capacity and the power density are improved; the magnetic flux gathering effect exists, and the no-load air gap magnetic density is higher; and the armature reaction flux is vertical to the permanent magnet flux in space, and the stronger demagnetization-resisting capacity is ensured.

The invention provides water pump pliers. The water pump pliers comprise a first fixed pliers arm, a second fixed pliers arm, a first movable pliers arm, a second movable pliers arm, a first clamping part, a second clamping part, a limiting rod and a connecting rod, wherein the first fixed pliers arm and the second fixed pliers arm are fixedly connected to from a fixed pliers arm assembly, the first movable pliers arm and the second movable pliers arm are hinged to the space between the first fixed pliers arm and the second fixed pliers arm through a sliding piece, through grooves are formed in the middle of the first fixed pliers arm and in the middle of the second fixed pliers arm respectively, the two ends of the sliding piece are movably installed in the two through grooves respectively, the limiting rod is arranged between the first fixed pliers arm and the second fixed pliers arm, a sliding groove is formed in the limiting rod, one end of the connecting rod is installed on the first fixed pliers arm, and the other end of the connecting rod is installed on the movable pliers arms. According to the water pump pliers, both the first clamping part and the second clamping part are made of rare earth permanent magnetic materials, are magnetic and can attract each other, in this way, a part is clamped by a pliers head, the clamping force is increased, operation is convenient, and working efficiency is improved; the water pump pliers are simple in structure, detachable and high in safety performance.

The invention relates to a high-thrust tubular linear motor which comprises a stator shell, a stator and a rotor. The stator is coaxially and fixedly mounted in the stator shell, the rotor is coaxially and slidably mounted in an inner cavity of the stator, the stator comprises silicon steel sheets and windings which are arranged at intervals and fixedly mounted on the stator shell, the rotor comprises a rotor shaft, permanent magnets and magnetic conduction rings, and the permanent magnets and the magnetic conduction rings are arranged at intervals on the rotor shaft. The high-thrust tubular linear motor is characterized in that the rotor shaft is made of hollow soft magnetic materials, a copper tube is coaxially sleeved outside the rotor, the windings and the silicon steel sheets are fixedly mounted at intervals to form the stator, and the windings and the silicon steel sheets correspond to the permanent magnets and the magnetic conduction rings of the rotor. The high-thrust tubular linear motor is ingenious in design, reasonable in structure, large in starting force, fine in tightness and reliable in operation.

The invention relates to a permanent-magnet embedded type large-scale speed change aerogenerator and belongs to the technical field of wind power generation. The aerogenerator includes a stator, a rotor, a main shaft, a rear end cover and a front end cover. The rotor is installed on the main shaft and supported by a bearing, the rear end cover and the front end cover. The main shaft is connected with a driving shaft of a prime motor through a flange. The aerogenerator is characterized in that the surface of the rotor is a disk formed by a laminated core, the rotor comprises a rotor core, a permanent-magnet and a rotor field spider, the rotor core is piled on the rotor field spider and provided with a groove matched with the permanent-magnet which is embedded in the groove of the rotor core, and the rotor field spider is sheathed on the main shaft for transmitting torque. The permanent-magnet has convenient installation and strong anti-demagnetization capacity, can reduce the manufacture labor hour and enhance the reliability of a permanent-magnet generator.

The invention provides a combination magnetic pole type build-in tangential permanent magnet synchronous motor, and belongs to the field of permanent magnet motors. The invention solves problems that harmonics exist in an air-gap magnetic field of a rare earth permanent magnet synchronous motor driven by sine waves, and partial irreversible demagnetization is prone to occur. The permanent magnet synchronous motor comprises a rotor and a stator. The rotor comprises a plurality of rotor poles and a rotor core, the plurality of rotor poles are uniformly distributed on a circumferential direction of the rotor core, and each rotor pole is vertically embedded within the stator core along a radial direction; the rotor pole comprises a rare earth permanent magnet pole and a ferrite permanent magnet pole; the ferrite permanent magnet pole is close to the air-gap side, and an internal end surface of the ferrite permanent magnet pole is combined with an external end surface of the rare earth permanent magnet pole; and both magnetization directions of the rare earth permanent magnet pole and the ferrite permanent magnet pole are parallel magnetization, and the magnetization directions are the same and are both perpendicular to the radius. The permanent magnet synchronous motor of the structure enables the air-gap magnetic field to contain a smaller number of harmonics, thereby improving motor efficiency; and moreover, ferrite permanent magnet materials are cheap, thereby reducing costs.

The invention discloses a composite magnetic pole type axial-flux permanent magnet synchronous motor, belongs to the field of permanent magnet motors, and aims at solving the problems that a harmonic wave exists in an air-gap magnetic field of a sine wave-driven rare-earth permanent magnet synchronous motor and local irreversible demagnetization easily occurs. The composite magnetic pole type axial-flux permanent magnet synchronous motor comprises a rotor and a stator, wherein the rotor and the stator are oppositely arranged in parallel; a plurality of rotor poles are evenly arranged on the surface, facing the stator, of a rotor core along the peripheral direction in a surface-mounted manner; the rotor poles are in an arc structure; each rotor pole comprises a rare-earth permanent magnet pole and two ferrite permanent magnet poles; one ferrite permanent magnet pole is arranged on each of the left end surface and the right end surface of each rare-earth permanent magnet pole; each rare-earth permanent magnet pole and each two ferrite permanent magnet poles form a continuous arc magnetic pole structure; and the magnetizing directions of the each rare-earth permanent magnet pole and each two ferrite permanent magnet poles all adopt axial magnetization and are the same. According to the permanent magnet synchronous motor with the structure, the harmonic content of the air-gap magnetic field is reduced; the motor efficiency is improved; meanwhile, the ferrite permanent magnet material is low in price; and the cost is reduced.

A position sensor system for determining a position of a sensor device relative to a magnetic structure, the system comprising: said magnetic structure comprising a plurality of poles; said sensor device comprising a plurality of magnetic sensors; the magnetic structure being movable relative to the sensor device, or vice versa; wherein: a distance between centres of adjacent poles varies along the movement direction; the sensor device is adapted: for determining a first magnetic field component parallel to, and a second magnetic field component perpendicular to a movement direction, and for calculating a coarse signal based on these components; and for determining a first and second gradient of these signals along the movement direction, and for calculating a fine signal based on these gradients; and for determining said position based on the coarse signal and the fine signal.

The invention provides a motor, a compressor and refrigeration equipment. The motor comprises: a stator assembly, wherein the stator assembly comprises a stator iron core, and the stator iron core isprovided with a stator slot gap; a rotor assembly which comprises a rotor iron core and a permanent magnet, wherein one of the stator iron core and the rotor iron core is arranged on the outer side ofthe other one in a surrounding manner, and the permanent magnet is arranged on the rotor iron core, wherein in the section perpendicular to the axis of the rotor core, the distance between the statorcore and the rotor core is [delta]mm, the length of the permanent magnet in the magnetization direction of the permanent magnet is h mm, the number of the stator slots is Q, the intrinsic coercive force of the permanent magnet is Hcj kA/m, and Hcj is smaller than or equal to 1800 kA/m, and the numerical value of h meets the equation that h is larger than or equal to 80*(43-Q)/Hcj and smaller thanor equal to 1.6+[delta]. According to the motor provided by the invention, the use of heavy rare earth elements is reduced, the cost is reduced, the use requirements of the compressor can be met, andthe cost performance of the motor is improved.

The invention provides a motor rotor and a permanent magnet motor. The motor rotor comprises a rotor iron core (1), multiple permanent magnet slots (2) are arranged along the circumference of the rotor iron core (1), the permanent magnets (3) are arranged in the permanent magnet slots (2), a magnetic shield slot (4) is arranged at the inner side of the permanent magnet slot (2), the width of the magnetic shield slot (4) is gradually reduced along a radial reaction of the central axis close to the rotor iron core (1); a strip-shaped first magnetic shield hole is arranged between two adjacent magnetic shield slots (4), a magnetic shield bridge is formed between the first magnetic shield hole and the magnetic shield slot (4), and the magnetic shield bridge and the magnetic pole center line are in a preset included angle. According to the motor rotor provided by the invention, the magnetic shield effect can be effectively improved, the flux leakage at the inner side of the motor is reduced, the magnetizing saturation of the motor rotor is improved, and the motor performance is improved.

The invention discloses a stator partition type hybrid excitation motor with a built-in adjustable magnetic ring structure. The motor comprises an outer stator, a rotor and an inner stator, the outer stator (1) and the rotor (2) are separated by an air gap, and the inner stator (3) and the rotor (2) are separated by an air gap; 12 outer stator teeth are uniformly arranged on the outer stator (1) along the circumferential direction, and armature windings (4) are wound on the outer stator teeth; 12 inner stator teeth are uniformly arranged on the inner stator (3) along the circumferential direction, a centralized excitation winding (5) is wound on the inner stator teeth, 12 permanent magnets (6) are uniformly inserted into a yoke part of the inner stator along the circumferential direction, each permanent magnet is magnetized in the tangential direction, the difference between the magnetizing directions of the two adjacent permanent magnets is 90 degrees, and 6 alternating magnetic bridges (7) are uniformly arranged on the inner side of the inner stator (3) and connected with a magnetism adjusting ring (8); and the middle rotor is composed of seven magnetism adjusting blocks which are evenly arranged. According to the invention, the output torque can be adjusted up and down according to the requirements of application occasions, and the flexibility is high.

The invention provides a novel permanent magnet synchronous motor structure, belonging to the technical field of motor structures. A motor body comprises a stator, a magnet adjusting iron block, a rotor and a permanent magnet; the magnet adjusting iron block is combined with the stator of the motor to form a stator gear; a magnetic spacing bridge is used between the rotor and a rotor shaft; and the rotor adopts a permanent magnet tangential built-in rotor. The technical points of the novel permanent magnet synchronous motor structure are as follows: the magnet adjusting iron block is added tothe motor to convert the traditional mechanical gear into a magnetic gear, so that the vibration noise of the motor becomes smaller and the torque density becomes higher; then the magnet adjusting iron block is combined with the stator of the motor to form the stator gear, therefore, one layer of air gap is decreased, and the motor structure is simplified; the magnetic spacing bridge is used between the rotor and the rotor shaft, so that a magnetic spacing air gap with high reluctance is introduced into the magnetic leakage loop, and the leakage magnetic flux at the inner diameter of the rotorcan be effectively suppressed; and the rotor adopts a permanent magnet tangential built-in rotor, so that the anti-demagnetization ability of the magnet becomes stronger, and the torque output rangebecomes larger, which facilitates the weak magnetic control.

The invention relates to a single-phase multifunctional rare-earth permanent magnet generator, mainly consisting of a shell, a stator, a rotor, an inverter and a control system. The stator comprises a stator iron core and an armature winding; the stator iron core is repeatedly pressed into a chute by stator punching, and the armature winding adopts concentric windings with different turns; the rotator consists of a rotating shaft, a cylindrical magnetic-permeability yoke and paired tile shape magnetic steels which respectively fix N pole and S pole respectively on the excircle of the magnetic yoke; and the control system consists of two circuits. The single-phase multifunctional rare-earth permanent magnet generator not only has the characters of small volume, light weight, high efficiency, simple structure and reliable operation, simultaneously overcomes the defects that the permanent magnet is difficult to adjust magnetic field to control voltage from the outside so as to cause that the voltage stability is poor and the waveform distortion factor is large, also can automatically switch to a first circuit of the control system for supplying power continuously when the inverter fails, realizes multifunctional and continuous power supply with more reliability and has outstanding practical value.

The invention discloses a corrosion-resistant and high-temperature-resistant composite metal, which comprises a composite material layer, a deformed permanent magnet alloy layer and a hard magnet alloy layer, wherein the composite material layer is a thermal bimetal, the thermal bimetal comprises phosphor copper, nickel, a titanium alloy, copper-nickel-manganese and a manganese-nickel-copper alloy, the deformed permanent magnet alloy layer is a copper-nickel-aluminum-based dispersion hardening alloy, the hard magnet alloy layer is an aluminum-nickel-cobalt hard magnet alloy, the thermal bimetal accounts for 30-45 wt%, the copper-nickel-aluminum-based dispersion hardening alloy accounts for 21-37 wt%, and the aluminum-nickel-cobalt hard magnet alloy accounts for 33-34 wt%. According to thepresent invention, the prepared corrosion-resistant and high-temperature-resistant composite metal has effects of high hardness, strong demagnetization resistance and high-temperature resistance.

The invention relates to the field of motor, in particular to an efficient permanent magnet synchronous motor which comprises a stator, a rotor, a fan and an end cap. The stator comprises a base and a winding stator core. The rotor comprises a rotating shaft, a rotor core, an aluminum ring and a permanent magnet, wherein an arc permanent magnet is arranged. An arc groove which is matched with the arc permanent magnet is arranged inside of the rotor. The arc permanent magnet is inlayed in the arc groove. By adopting the structure, the invention has the advantages of high utilization factor of permanent magnet, high demagnetizing property, high pull-in synchronism capability of motor, big reluctance torque and motor overloading times, and the like.