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401 results about "Permanent magnet rotor" patented technology

Permanent magnet rotor system capable of guaranteeing ultrahigh-speed stability

The invention relates to the technical field of energy-saving permanent magnet motors, and discloses a permanent magnet rotor system capable of guaranteeing ultra-high-speed stability, which comprises a permanent magnet rotor and a controller, and is characterized in that the controller injects current synthesized by fundamental waves and specific space harmonics into a stator winding on the basis of not depending on rotor radial position feedback, so that the permanent magnet rotor is controlled to rotate; an electromagnetic potential well with radial self-recovery force is constructed in an air gap of the motor; moreover, the controller also monitors the change rate of an internal torque instruction, foreseeably and instantaneously reinforces the potential well to resist impact, and synchronously corrects the fundamental current to eliminate parasitic torque pulsation associated with reinforcement. And the rotor stability is converted from a dynamic adjustment problem depending on external high-speed closed-loop control to an intrinsic constraint problem of motor self-guarantee, so that the risk of failure caused by signal delay at an ultra-high speed in traditional reaction type control is reduced.
Owner:CHANGSHA XEMC ELECTRIC TECHNOLOGY CO LTD

High-torque-density duplex-winding multi-harmonic co-excitation field modulation permanent magnet motor

Winding grooves are formed in a stator iron core in the circumferential direction, the winding grooves comprise outer-layer stator grooves on the yoke portion side and inner-layer stator grooves on the side close to a permanent magnet rotor, harmonic windings are embedded in the outer-layer stator grooves, and the harmonic windings are double-layer short-pitch windings; a fundamental wave winding is embedded in the inner-layer stator slot, and the fundamental wave winding is a centralized winding; a plurality of modulation teeth are arranged in the stator iron core along the circumferential direction in a non-equidistant manner; the number pf of pole pairs of the fundamental wave winding is consistent with the number pf of pole pairs of the permanent magnet rotor, the number ph of pole pairs of the harmonic wave winding is different from the number pf of pole pairs of the fundamental wave winding, and the number Ns of poles of the modulation teeth meets the condition that Ns = pf + ph, Ns = (1 + 2n) ph or Ns = (1 + 3n) ph. The technical defects that a traditional permanent magnet motor cannot utilize harmonic waves and a conventional magnetic gear effect permanent magnet motor cannot efficiently utilize harmonic waves and fundamental waves to do work can be overcome, the torque density of the motor is greatly improved while the power factor is not degraded, and the complexity, the system cost and the additional loss of a magnetic field modulation structure are reduced.
Owner:SOUTHEAST UNIV

Interventional imaging catheter and six-degree-of-freedom positioning method, system, equipment and medium thereof

PendingCN120771420ACatheterSensorsPermanent magnet rotorInterventional imaging
For interventional surgery, robot-assisted operation and image guidance are urgently required clinically. However, due to limitation of size, magnetic component interference and the like, tracking and positioning of magnetic imaging catheters in IVUS and OCT forms are difficult problems. The interventional imaging catheter, the six-degree-of-freedom positioning method, the six-degree-of-freedom positioning system, the six-degree-of-freedom positioning equipment and the medium are different from a magnetic positioning method of a transmission embedded sensor, and the interventional imaging catheter is compatible with a magnetic part in a permanent magnet rotor form. Meanwhile, in cooperation with a magnetic positioning search strategy for linearly solving an initial value, positioning of the catheter can be rapidly achieved.
Owner:SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI

Novel parallel variable-pole-arc hybrid excitation brushless synchronous generator

The invention relates to a novel parallel pole-arc-changing hybrid excitation brushless synchronous generator, which comprises a first magnetic circuit, a second magnetic circuit and a third magnetic circuit, the first magnetic circuit is formed by an original stator permanent magnet rotor of the motor; corresponding hybrid excitation rotors are arranged on the left and right outer sides of the stator, and a second magnetic circuit is formed between the hybrid excitation rotors and the iron core of the stator; an excitation winding is further arranged on the outer side of the corresponding hybrid excitation rotor, and the excitation winding enables common teeth of the hybrid excitation rotor to be magnetized into different polarities, so that a third magnetic circuit for increasing or weakening magnetism is formed. The motor has the beneficial effects of wide rotating speed adjusting range, high power density and high efficiency.
Owner:CHENGDU ELECTRIC MFG CO

High-speed built-in permanent magnet rotor design method, system and equipment based on stress analysis model

The invention belongs to the field of rotor design, particularly relates to a high-speed built-in permanent magnet rotor design method, system and equipment based on a stress analysis model, and aims to solve the problem that the structural strength and electromagnetic performance of a high-speed built-in permanent magnet synchronous motor rotor are difficult to collaboratively optimize in the prior art. The method comprises the steps of determining the axial length and the outer diameter of a rotor according to a motor torque demand and an assembly space, and ensuring that a critical rotating speed is higher than a target limit value through dynamic verification; decomposing the rotor into pole shoe, permanent magnet and slotting areas, calculating centrifugal force in different areas, and superposing to obtain a total load; establishing a corresponding stress boundary equation set for a non-magnetic bridge, single / combined magnetic bridge or sheath composite structure; and solving the equation set based on the target rotating speed, and synchronously optimizing the sheath thickness, the magnetic bridge width and the interference magnitude parameter by using the intersection point of the isorotation speed line and the electromagnetic-mechanical characteristic curve. The problem of contradiction between size parameters and performance in traditional design is solved, and calculation efficiency and precision are both considered.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +1

Electric machine with permanent magnet rotor

An electric machine having a shaft, a rotor with a magnetic core comprising a series of stacked laminations and a plurality of seats oriented axially, a plurality of magnetic poles, each having two permanent magnets, and a stator. The magnetic core comprises first laminations alternated with different second laminations, with at least ten second laminations interposed between two first laminations. Each first lamination has, for each seat, two first fixing blades, which are parallel to each other, and arranged on the same side of the first seat and bent by 90° against a same larger side wall of a corresponding permanent magnet, and also has, for each seat, a second fixing blade, which is oriented perpendicular to the corresponding first fixing blades and bent by 90° against a smaller side wall of a corresponding first permanent magnet. Each second lamination lacks fixing blades bent against the corresponding permanent magnet.
Owner:MARELLI EURO SPA

Liquid pump

A liquid pump with a housing in which a wound stator and electronics are arranged in a dry area. A permanent magnet rotor is arranged in a wet area. A shaft is held on the one hand in a pump head and on the other hand in a shaft receptacle in a containment shell. The containment shell separates the dry area from the wet area. At least one bearing is incorporated in the permanent magnet rotor and is arranged rotatably on the shaft, wherein the permanent magnet rotor comprises a plastic insert and a permanent magnet, and at least one fluid channel runs parallel to the axis and is formed between the plastic insert and the permanent magnet.
Owner:BUHLER MOTOR GMBH

Performance degradation evaluation method for permanent magnet motor magnet with replaceable permanent magnet rotor

The invention discloses a permanent magnet motor magnet performance degradation evaluation method, belongs to the field of permanent magnet motor tests, and is used for solving the technical problem that reversible demagnetization and irreversible demagnetization are difficult to effectively distinguish in the prior art. The method comprises the following steps: step 1, installing a selected adaptive permanent magnet rotor assembly on a motor installation seat of a test bed; 2, hardware debugging is completed; 3, test parameters are set, and a cooling module is started; 4, starting the to-be-tested permanent magnet motor according to a set rotating speed, gradually applying a load by a loading device according to a test requirement, and monitoring the running state of the motor in real time; step 5, collecting performance data of the permanent magnet motor to be tested according to a preset sampling frequency; step 6, repeating the steps 2-5 to carry out a cyclic test, wherein the cumulative operation time is greater than or equal to 100 hours; sampling is conducted after circulation, and the coercive force change rate delta Hcj and the residual magnetism change rate delta Br of the sample are measured. According to the invention, whether irreversible performance degradation of the magnet occurs can be determined.
Owner:CHINA IRON & STEEL RESEARCH INSTITUTE GROUP CO LTD

Novel magnetic suspension bearingless motor and pump

The novel magnetic suspension bearingless motor comprises permanent magnet rotors, a main shaft and a stator assembly, the two permanent magnet rotors are coaxially arranged along the axial direction, the two permanent magnet rotors are respectively and fixedly connected with the main shaft, the number of magnetic poles of the two permanent magnet rotors is the same, and the arrangement directions of the magnetic poles are the same. The two stator assemblies are located on the outer sides of the two permanent magnet rotors respectively, and the two stator assemblies drive the two permanent magnet rotors to suspend and rotate through magnetic force respectively. The two stator assemblies correspond to the permanent magnet rotors respectively, two independent magnetic circuits are formed, the total electromagnetic force borne by the permanent magnet rotors is improved, and therefore under the condition that the sizes of motors are the same, larger power is provided for a main shaft, and the flow and lift of a pump are improved.
Owner:PANTHER TECHNOLOGY (SHENZHEN) CO LTD

Permanent-magnet rotor and electric machine

The invention relates to a permanent-magnet rotor (1) for an electric machine (2), comprising a rotor body (3) having a plurality of magnet pockets (4) for receiving permanent magnets (5) which are configured to form alternating magnetically opposed rotor poles (6) distributed over the circumference of the rotor body (3), wherein circumferentially adjacent magnet pockets (4) of a rotor pole (6) are each separated from one another by a radially extending bridge (7), wherein an opening (8) in the form of a circular ring segment is formed in the rotor body (3) so as to be radially aligned with and radially outwardly spaced from at least one bridge (7).
Owner:SCHAEFFLER TECHNOLOGIES AG & CO KG

Electric motor with hybrid magnet rotor comprising similar magnet blocks

A permanent magnet rotor assembly for an electric motor, an electric vehicle, and a method are provided. The assembly includes an annular stack of rotor lamination layers ("rotor laminations") constructed from a magnetic core material. The rotor laminations have inboard axial surfaces that collectively define a set of first openings through the magnetic core material and a set of second openings through the magnetic core material. The annular stack includes a first arrangement of permanent magnets and a second arrangement of permanent magnets.
Owner:GM GLOBAL TECHNOLOGY OPERATIONS LLC

Electromechanical apparatus and transmission unit with the electromechanical apparatus and vehicle with the transmission unit

The present disclosure relates to an electromechanical apparatus (100) and to a transmission unit comprising the electro-mechanical apparatus (100) for changing motion parameters and to a vehicle comprising the transmission unit, the electro-mechanical apparatus (100) comprising a first rotating electromechanical ma-chine (110) comprising a first stator (112) and a first rotor (120), a second rotating electromechanical machine (130) having a smaller radial extension than the first rotating electromechanical machine (110) and comprising a second stator (132) and a second rotor (140), wherein the second rotating electromechanical ma-chine (130) is arranged radially within the first rotating electromechanical ma-chine (110) thereby forming an interleaving region (176) of the electromechanical apparatus (100), and wherein the first stator (112) and the second stator (132) are ironless, and wherein the first rotor (120) and the second rotor (140) are per-manent-magnet rotors or rotors comprising a winding for electrical excitation.
Owner:CHE MOTOR AG

High-inertia multi-port composite motor for new energy grid connection

The invention discloses a high-inertia multi-port composite motor for new energy grid connection. The high-inertia multi-port composite motor comprises a brushless doubly-fed motor, an axial permanent magnet motor and a magnetic gear structure. The brushless doubly-fed motor comprises a radial stator and a squirrel cage rotor, a power winding and a control winding are arranged in the stator and serve as a first electric port and a second electric port respectively, the axial permanent magnet motor comprises an axial stator and an axial permanent magnet rotor, and an armature winding is arranged in the stator and serves as a third electric port. The magnetic gear structure is arranged on the inner side of the squirrel cage rotor and the outer side of the rotating shaft, a brushless doubly-fed motor rotor magnetic field is used as a modulation magnetic source, the phase and amplitude of the magnetic field are adjustable, dynamic adjustment of the transmission ratio of the magnetic gear is achieved through a control winding, and electromagnetic and mechanical dual coupling is achieved. The equivalent rotational inertia of the composite motor is obviously higher than that of a single machine, stronger inertia support and frequency stability can be provided for a power grid in a new energy grid connection process, and the composite motor is provided with three independent electric ports, realizes multi-mode operation, and is compact in structure and high in power density.
Owner:HUNAN UNIV

Hybrid excitation magnetic circuit structure, motor with same and control method thereof

The invention provides a hybrid excitation magnetic circuit structure, a motor with the structure and a control method of the motor. According to the hybrid excitation magnetic circuit structure, basic magnetic flux is provided through a permanent magnet rotor assembly, the magnetic flux is dynamically adjusted through an electro-magnetic winding assembly, and superposition enhancement or partial counteracting of a main air gap magnetic field can be achieved only by switching the direction of electro-magnetic current; the output torque of the motor is obviously enhanced; and second-direction current is conducted in a constant power area to counteract part of magnetic flux and expand the speed regulation range of the motor, so that various working condition requirements can be met, and wide-range efficient operation is realized.
Owner:SUZHOU LEGO MOTORS CO LTD

A method for detecting a permanent magnet of a motor rotor core

The application relates to the technical field of rotor detection, and discloses a motor rotor core permanent magnet detection method, which is characterized by comprising the following steps: S1, fixing a magnetic field detection device at a tangent point position of the permanent magnet rotor; placing a detection probe of the magnetic field detection device at a certain position away from the rotor, the magnetic field detection device needs to be aligned with the diameter of the rotor, and the spacing between the detection probe and the rotor can ensure that the magnetic tiles placed later will not contact the detection probe; S2, a speed detection motor detects the rotating speed and rotating position of the rotor while the motor drives the rotor to rotate. The application compares multiple'magnetic field strength-mechanical angle' models, and compares the magnetic field strengths under the four mechanical angles of 0-90 DEG, 90-180 DEG, 180-270 DEG and 270-360 DEG in the same coordinate system, so that whether the four main tiles on the rotor appear the phenomenon of magnetic field deficiency can be intuitively analyzed.
Owner:TAI XIN DIAN JI SU ZHOU YOU XIAN GONG SI

Medium-high lift full-cross-flow submersible mixed-flow electric pump

The invention belongs to the technical field of submersible pumps, and provides a medium-high-lift full-cross-flow submersible mixed-flow electric pump which comprises a water suction chamber, an impeller and a water outlet cylinder which are coaxially connected in sequence, a rotating shaft is arranged in the center of the impeller, the two ends of the rotating shaft are in rotatable supporting connection with the water suction chamber and the water outlet cylinder respectively, and a motor shell is arranged on the outer side of the impeller. The two ends of the motor shell are fixedly connected with the water suction chamber and the water outlet cylinder respectively, a wet stator is fixed to the inner side of the motor shell, a permanent magnet rotor is fixed to the outer side of the impeller, the wet stator drives the permanent magnet rotor to drive the impeller to rotate, and a fixing sleeve for fixing the permanent magnet rotor is arranged on the outer side of the impeller. And gaps are formed between the end parts of the two sides of the fixing sleeve and the water suction chamber and between the end parts of the two sides of the fixing sleeve and the water drum and are tooth-shaped. And through the arrangement of the tooth-shaped gaps, the path length of the gaps is prolonged, and a vertically staggered blocking structure is also formed, so that particulate matters in a water body can be prevented from entering the motor cavity.
Owner:HEFEI SCI-ASIA MOTOR & PUMPS TECH CO LTD

Permanent magnet rotor with enhanced demagnetization protection

A permanent magnet motor includes a rotor and an irregular polyhedron-shaped magnet assembly. The rotor may define at least one magnet opening and may be configured to rotate within a circular opening defined by a stator. The irregular polyhedron-shaped magnet assembly may be disposed in the magnet opening and may define a magnetization direction, wherein a height along the magnetization direction and perpendicular to a lamination plane of the rotor is greater at both ends than at a central portion disposed therebetween.
Owner:FORD GLOBAL TECH LLC

Disc type permanent magnet rotor magnetic steel assembly tool

The utility model relates to a disc type permanent magnet rotor magnetic steel assembly tool, a disc type permanent magnet rotor comprises magnetic steel and a supporting piece, the supporting piece comprises a rotating shaft, a supporting plate and a columnar fixing core which are coaxially arranged, and the tool comprises a swing rod, a first jacking piece and a second jacking piece; one end of the swing rod is rotatably fixed to the rotating shaft, the first jacking piece and the second jacking piece are adjustably fixed to the end, away from the rotating shaft, of the swing rod, the moving direction of the first jacking piece is parallel to the axial direction of the rotating shaft, and the moving direction of the second jacking piece is in the radial direction of the rotating shaft. Compared with the prior art, the device has the advantages of convenience in operation, high adaptability and the like.
Owner:SHANGHAI SHANGDIAN ELEC MASCH CORP

Permanent magnet rotor magnetic steel separation device and separation method

The invention relates to the technical field of magnetic steel sheet separation for permanent magnet rotors, in particular to a magnetic steel separation device and method for a permanent magnet rotor, and the device comprises a supporting table, a limiting baffle, a movable baffle, and a pushing assembly. The limiting baffle is fixedly arranged on the supporting table, the movable baffle is movably arranged relative to the limiting baffle, a placement space is formed between the movable baffle and the limiting baffle, and through grooves are reserved between the bottoms of the movable baffle and the limiting baffle and the supporting table; the pushing assembly comprises a pushing plate and a driving assembly which is connected with the pushing plate and drives the pushing plate to push out the lowermost magnetic steel sheet; two clamping assemblies are symmetrically arranged on the side wall, facing the limiting baffle, of the movable baffle in the pushing direction. Each clamping assembly comprises an eccentric roller stretching across the stacked magnetic steel, a supporting frame and a driving motor. And a position sensor is arranged below the movable baffle. Through controllable clamping arrangement of the two eccentric rollers, the magnetic steel sheets are prevented from being abraded in the return stroke process of the push plate while automatic progressive feeding of the magnetic steel sheets is guaranteed.
Owner:JIANGSU ZHIMA TECH CO LTD

Built-in tangential mixed magnetic steel magnetism gathering type permanent magnet rotor

A built-in tangential mixed magnetic steel magnetism gathering type permanent magnet rotor relates to the technical field of motors, the rotor comprises a rotor iron core and a rotating shaft, the rotor iron core is provided with a plurality of permanent magnet units which are symmetrically arranged around the axis of the rotor iron core, and the permanent magnet rotor is characterized in that each permanent magnet unit comprises a middle magnetic steel, middle air permanent magnet grooves and radial magnetic steel are arranged between the adjacent permanent magnet units, the middle air permanent magnet grooves and the radial magnetic steel are arranged on the q shaft, the middle air permanent magnet grooves are arranged on the inner sides of the radial magnetic steel, and the middle magnetic steel and the adjacent radial magnetic steel on the two sides of the middle magnetic steel are arranged in a U shape. The rotor provided by the utility model can reduce motor noise and torque ripple.
Owner:SHANGHAI TOP MOTOR +1

A small generator

The application discloses a small generator and relates to the technical field of generators.The generator comprises a shell, double-end heat dissipation ventilation holes, a shieldable permanent magnet rotor and a temperature control and torque limiting protection assembly.A groove on the outer periphery of the rotor and an embedded paddle build through air flow when rotating, so that self-driven heat dissipation is realized.The temperature rise of a coil triggers a triode driven protection electromagnet through a thermistor, the torque transmission of a toothed disc friction coupling is adjusted, continuous derating is realized, and the generator can be stopped until zero coupling.The permanent magnet adjusting assembly is combined with an electromagnetic locking mechanism through an iron shell body-aluminum strip-permanent magnet combination, the magnetic field output is quickly cut off, and no induced voltage is generated during maintenance.
Owner:深圳市中凯科技有限公司

ELECTRIC MOTOR WITH MIXED MAGNETIC ROTOR WITH SIMILAR MAGNETIC BLOCKS

A permanent magnet rotor assembly for an electric motor, an electrified vehicle, and a method are provided. The assembly comprises an annular stack of rotor lamination layers (“rotor lamellae”) constructed from a magnetic core material. The rotor lamellae have internal axial surfaces that together define a group of first openings through the magnetic core material and a group of second openings through the magnetic core material. The annular stack comprises a first array of permanent magnets and a second array of permanent magnets.
Owner:GM GLOBAL TECHNOLOGY OPERATIONS LLC

Structure-electromagnetism collaborative optimization device of ultrahigh-speed permanent magnet motor driven centrifugal hydrogen circulating pump

The invention relates to the technical field of collaborative design of ultra-high-speed motors and fluid machinery, in particular to a structure-electromagnetic collaborative optimization device of a centrifugal hydrogen circulating pump driven by an ultra-high-speed permanent magnet motor, which comprises an ultra-high-speed permanent magnet motor module consisting of a stator iron core, a permanent magnet rotor, a high-frequency inverter and a non-contact bearing, the permanent magnet rotor is rigidly connected with the centrifugal impeller, and the rotating speed of the rotor ranges from 80000 r / min to 200000 r / min; the centrifugal hydrogen pump module comprises a pump body, a three-dimensional flow channel impeller, a hydrogen sealing assembly and an inlet and outlet pressure sensor, an impeller blade profile is designed based on pneumatic-electromagnetic coupling simulation optimization, collaborative optimization of structure-electromagnetic parameters is achieved, an independently designed matching blind area is eliminated through an integrated controller, and under the working condition of 150000 r / min, the matching blind area of the three-dimensional flow channel impeller is controlled to be matched with the matching blind area of the three-dimensional flow channel impeller. The comprehensive efficiency of the system is improved by 8%-12%, and the vibration noise is reduced by 15-20 dB; when the hydrogen flow suddenly changes (0.5 kg / h to 3 kg / h), the cooperative adjustment time of the rotating speed of the motor and the opening degree of the guide vane of the impeller is smaller than or equal to 0.3 s, and surge and overload are effectively avoided.
Owner:HEBEI COMM VOCATIONAL & TECH COLLEGE

Sealed fermentation device for preparing microbial fertilizer

The invention discloses a sealed fermentation device for microbial fertilizer preparation, and relates to the technical field of fermentation devices.The sealed fermentation device comprises a fermentation box, a feeding port is fixed to the upper end of the fermentation box, a discharging valve port is fixed to the lower end of the fermentation box, an air cylinder is further fixed to the fermentation box, and a movable plate is fixed to the output end of the air cylinder; a motor is fixed to the lower end face of the movable plate, and an output shaft of the motor is in sliding connection with the fermentation box. According to the sealed fermentation device for preparing the microbial fertilizer, an air gap between a conductor rotor and a permanent magnet rotor is adjusted through an air cylinder, so that the rotating speed of a stirring plate can be changed, the stirring plate is driven to rotate by matching with transmission of a rack and a gear, and inclination angle adjustment of the stirring plate can be synchronously realized, so that low-viscosity materials can be stirred at high rotating speed and large inclination angle; the radial flow of the material is enhanced, the high-viscosity material is stirred at low rotating speed and small inclination angle, and the axial pushing is enhanced, so that the device is suitable for mixing the materials with different viscosities.
Owner:HUNAN KESEN AGRI CO LTD

Magnetic type multistage coupler

The utility model provides a magnetic type multistage coupler, which relates to the technical field of couplers, and comprises a shell, one side of the inner wall of the shell is rotatably connected with a permanent magnet rotor, the inner wall of the permanent magnet rotor is fixedly connected with an air gap controller, and the air gap controller is arranged on the inner wall of the shell. The inner wall of the air gap controller is fixedly connected with a rotating shaft load shaft, the outer surface of the permanent magnet rotor is rotatably connected with a conductor rotor, the conductor rotor is arranged on the other side of the inner wall of the shell, the inner wall of the conductor rotor is fixedly connected with a connecting piece, and the connecting piece is arranged on the inner wall of the shell. By arranging the two clamping plates, under the action of the two threaded rods, the threaded rods can drive the clamping plates to move until the motor shaft is completely clamped by the two clamping plates, auxiliary fixing can be carried out between the motor shaft and the connecting piece, connection between the motor shaft and the connecting piece can be prevented from loosening, and the motor shaft is prevented from being damaged. Therefore, the load power of the coupler is prevented from being reduced.
Owner:CIXI ZHIDE COMM TECH CO LTD

Centering structure for assembling permanent magnet coupler

The invention provides a centering structure for assembling a permanent magnet coupler, and relates to the technical field of permanent magnet coupler assembly.The centering structure comprises two supporting centering structures which are symmetrically arranged and a centering driving part which drives the two supporting centering structures to move synchronously; the supporting centering structure is composed of a centering supporting cylinder piece, a centering jacking assembly and a centering inner supporting piece, and the jacking plate pieces abut against each other to make the centering inner supporting piece expand in the radial direction, so that shaft sleeves of the permanent magnet rotor part and the conductor rotor part are automatically centered. During assembly, the centering driving part pushes the two supporting structures to move oppositely, the jacking assembly axially moves to drive the inner supporting part to radially jack the inner wall of the shaft sleeve, and concentric positioning of the two rotors is achieved; and after assembly is completed, the driving component moves reversely, and the inner supporting piece retracts and is pulled away. The automatic centering device solves the problems of low centering precision and poor efficiency in traditional assembly, has the advantages of self-adaptive centering, high precision, high universality and quick disassembly and assembly, and is suitable for assembly of permanent magnet couplings of different specifications.
Owner:NANJING DYT PERMANENT MAGNET TECH CO LTD

Method for manufacturing interior permanent magnet rotor and device for manufacturing interior permanent magnet rotor

This method for manufacturing an interior permanent magnet rotor comprises an orienting and molding step for filling slots formed in a rotor core (12) with a composition for forming anisotropic bonded magnets, magnetically orienting a magnet material contained in the composition filling the slots by applying magnetic flux to the magnet material using an orienting unit (50), and molding the composition. The orienting unit comprises: a plurality of magnetic flux generating members (52) that generate magnetic flux; a plurality of intermediate members (54); and a plurality of support members (56) provided to each of the plurality of magnetic flux generating members. Each of the support members has an arm part (58) extending toward the radially inward side of the orienting unit along a lateral surface of the magnetic flux generating member. When the rotor core is accommodated inside the plurality of magnetic flux generating members, the tips of the arm parts support a thinnest part between the outer circumferential surface of the rotor core and the slots from the radially outward side of the orienting unit.
Owner:DENSO CORP

A vertical mill drive system

This utility model belongs to the technical field of vertical mills and discloses a vertical mill drive system. The vertical mill drive system includes a housing, a main shaft, a stator assembly, a permanent magnet rotor, a transmission assembly, a thrust bearing, and a high-pressure pipeline. The housing has a motor cavity and a mounting cavity. The housing is provided with a lubrication channel communicating with the mounting cavity. The main shaft passes through the motor cavity, and one end of the main shaft extends out of the mounting cavity and is used to connect with the grinding disc. The stator assembly is installed on the inner wall of the motor cavity. The permanent magnet rotor is located inside the stator assembly and is sleeved on the main shaft. The transmission assembly is installed in the motor cavity, and the power input end of the transmission assembly is connected to the permanent magnet rotor, and the power output end is connected to the main shaft. The thrust bearing is sleeved on the main shaft and abuts against the grinding disc. The high-pressure pipeline is installed in the mounting cavity and communicates with the lubrication channel. The high-pressure pipeline is used to spray lubricating oil toward the thrust bearing. This vertical mill drive system has a simple structure, low installation and debugging difficulty, and is very convenient for operation and maintenance.
Owner:SUZHOU HUIHANG DRIVE CO LTD

A kind of easy to dismantle inner tube type wheel hub motor nozzle restraint structure

The application discloses a tire inflation valve restraint structure of an easy-to-disassemble inner tube type wheel hub motor, which comprises a coaxial stator shaft, two end covers, a wheel rim, an inner tube, a permanent magnet rotor, a stator winding and an outer tube; the two end covers are locked on the two sides of the wheel rim, and the inner ring of the end cover is rotationally matched with the stator shaft; the outer tube is arranged on the outer ring of the wheel rim, and the inner tube is arranged in the outer tube; the outer ring of the end cover is integrally provided with a structure ring, a local part of the structure ring of one of the two end covers is provided with a tire inflation valve protruding gap, the wall body on the side close to the tire inflation valve protruding gap of the wheel rim is hollowed out to form a tire inflation valve through hole, the cylindrical tire inflation valve of the inner tube sequentially passes through the tire inflation valve through hole and the tire inflation valve protruding gap and is exposed outside, a tire inflation valve restraint device is arranged at the tire inflation valve protruding gap and tightly holds the cylindrical tire inflation valve; while effectively restraining the tire inflation valve, the easy-to-disassemble and easy-to-mount performance is realized.
Owner:DARFON ELECTRONICS (SUZHOU) CO LTD

Rotor Hall installation structure of embedded magnetic steel permanent magnet motor and motor

The utility model discloses a rotor Hall installation structure of an embedded magnetic steel permanent magnet motor, which comprises an installation support and a Hall sensor, the installation support can be fixedly connected with a component on the motor, and the Hall sensor is fixedly installed on the installation support. The Hall sensor on the mounting bracket avoids a strong electromagnetic area of the stator winding and a high-temperature area generated when the stator winding works, and corresponds to the outer edge of the end part of the motor rotor, so that magnetic field induction is formed between the Hall sensor and the outer edge of the embedded magnetic steel rotor. According to the utility model, through the designed mounting bracket, the mounting position of the Hall sensor is transferred from the original mounting position in a strong electromagnetic environment, so that the Hall sensor is mounted on the side surface of the rotor, and the surface magnetic pole reflected to the rotor iron core by the embedded magnetic steel is read; therefore, the Hall sensor avoids a strong electromagnetic and strong high-temperature area, so that the Hall sensor can accurately read the polarity of the magnetic pole of the rotor. The utility model also discloses a motor.
Owner:ZHEJIANG DAXING TECH +1