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59results about How to "Small excitation loss" patented technology
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Mixed permanent magnetic pole-alternating and magnetic flux-switching memory motor and winding switching magnetism-weakening control method thereof
ActiveCN104578477ASimple structureImprove space utilizationAC motor controlMagnetic circuit stationary partsLow speedMagnetic poles
The invention discloses a mixed permanent magnetic pole-alternating and magnetic flux-switching memory motor and a winding switching magnetism-weakening control method thereof. The mixed permanent magnetic pole-alternating and magnetic flux-switching memory motor comprises a salient rotor and a stator, wherein the stator contains stator cores, aluminium-nickel-cobalt permanent magnets, neodymium-iron-boron permanent magnets, centralized armature windings and pulsed magnetism-adjusting windings; iron core edges of two adjacent outer U-shaped units and tangentially-magnetized long-stripped neodymium-iron-boron permanent magnets form a first permanent magnetic pole, while the circumferentially-inward (outward) and parallel-magnetized V-shaped embedded aluminium-nickel-cobalt permanent magnets and inner U-shaped units form a second permanent magnetic pole; mixed magnetic poles are in alternating polarity distribution; when the motor runs at a low speed, the pulsed magnetism-adjusting windings are in direct-current pulsed working state, while in a high-speed weak-magnetism area, the pulsed magnetism-adjusting windings are converted into alternating-current armature windings. Requirements on performance in a low-speed area and in the high-speed area can be met at the same time; influence of an armature reaction field on the aluminium-nickel-cobalt permanent magnets with low coercivity is small; the utilization rate of permanent magnetism, the torque density, and the reliability of system operation are high.
Owner:SOUTHEAST UNIV
Axial magnetic field magnetic flux switching type surface-mounted permanent magnet memory motor
ActiveCN103490573ASimple structureReduce wind resistanceMagnetic circuit rotating partsMagnetic circuit stationary partsSurface mountingElectric machine
The invention discloses an axial magnetic field magnetic flux switching type surface-mounted permanent magnet memory motor. The permanent magnet memory motor comprises a first rotor (41), a second rotor (42), a stator (1) and an installing shaft, wherein the stator (1) is arranged between the first rotor (41) and the second rotor (42) and of an axial two-side symmetrical structure, the installing shaft is used for coaxially installing the stator (1), the first rotor (41) and the second rotor (42), and the stator is located between the two rotors to form an axial two-air-gap motor. The stator (1) is of the two-side symmetrical salient pole structure and comprises a stator iron core (2), a plurality of permanent magnets (3), a three-phase armature winding (5) and a single-phase pulse winding (6). The stator iron core (2) comprises a stator yoke (2.1) and stator teeth (2.2), wherein the stator teeth (2.2) protrude in the center direction of the first rotor (41) and in the center direction of the second rotor (42) respectively from the stator yoke (2.1). By the adoption of the permanent magnet memory motor, power density of the motor is improved, and the wide rotating speed operation range is possessed.
Owner:SOUTHEAST UNIV
Built-in permanent magnet memory motor of magnetic flux switching type
InactiveCN103199661ASimple structureReduce wind resistanceMagnetic circuit rotating partsSynchronous machine detailsMechanical reliabilityElectric machine
The invention discloses a built-in permanent magnet memory motor of a magnetic flux switching type. The permanent magnet memory motor comprises a casing, a stator, a rotor and a rotating shaft, wherein the stator is a cylinder with a through hole and is formed by a star-shaped magnetic isolation block with a center through hole and partitioned rotor iron core discs; the rotating shaft is fixedly connected in the center through hole of the magnetic isolation block; and the partitioned rotor iron core discs are shaped like a fan and are uniformly distributed at the circumference of the rotor as well as fixedly connected to the outer surface of the magnetic isolation block. The stator comprises a stator iron core, permanent magnets, three-phase armature windings and pulse windings, wherein the stator iron core comprises a stator yoke and stator teeth formed by permanent teeth and armature teeth; the permanent magnets are shaped like a tile and radially magnetized, so that magnetic leakage factors are small; the magnetization directions of the two adjacent permanent magnets are opposite; the three-phase armature windings are wound on the armature teeth; and the pulse windings are wound on the permanent magnets. According to the permanent magnet memory motor, the weak magnetic ability and the rotation speed running range of the motor can be improved; and the no-load air gap magnetic field can be adjusted. In addition, the permanent magnet memory motor disclosed by the invention is strong in mechanical reliability, thereby being suitable for high-speed running.
Owner:SOUTHEAST UNIV
Magnetic flux switching type permanent magnet memory motor
ActiveCN103051139ASimple structureStable structureSynchronous machinesMagnetic circuit stationary partsElectric machineMemory motor
The invention discloses a magnetic flux switching type permanent magnet memory motor comprising an enclosure, a stator contained in the enclosure, a rotor (2) and a non-magnetic rotary shaft (8). The magnetic flux switching type permanent magnet memory motor is characterized in that the stator (1) is arranged at the outer part of the rotor (2); the rotor (2) is fixedly arranged on the non-magnetic rotary shaft (8) and is in a convex pole type; the rotor (2) comprises a rotor main body part and rotor teeth which protrude from the main body part to a direction which is far away from the center of the rotor; the stator comprises a stator iron core (1), a permanent magnet (3), a three-phase armature winding (4) and a pulse winding (5); the stator iron core (1) comprises a plurality of stator yokes and stator teeth (1.1) which protrude from the stator yokes to the direction of the center of the stator iron core; and the three-phase armature winding (4) is wound on the stator teeth (1.1). According to the magnetic flux switching type permanent magnet memory motor disclosed by the invention, a motor no-load gap magnetic field is adjustable, and the weak magnetism capability and the rotary speed operation speed of the motor are improved; and meanwhile, the torque and the power density of the motor are improved and the copper consumption of the motor is reduced.
Owner:SOUTHEAST UNIV
Magnetic gear type double-stator hybrid permanent magnet memory motor
InactiveCN105141092ASimple structureImprove space utilizationMagnetic circuit rotating partsMagnetic circuit stationary partsEpoxyElectric machine
The invention discloses a magnetic gear type double-stator hybrid permanent magnet memory motor. The motor comprises an external stator, a rotor and an internal stator which are coaxially arranged and sleeved from outside to inside in turn. The external stator comprises armature iron core teeth, stator yokes and armature windings which are arranged on the armature iron core teeth. The internal stator comprises an internal stator iron core provided with internal slots, neodymium iron boron permanent magnets, aluminum nickel cobalt permanent magnets and pulse magnetic regulating windings which are arranged in the internal slots of the internal stator. The two types of co-excitation permanent magnets are arranged in a "U" shape. The number of single permanent magnets on the internal stator is equal to that of external stator armature teeth. The whole rotor has an annular cup-shaped structure. Rotor iron blocks are fixed in a non-magnetic-conductive epoxy resin sleeve. The rotor iron blocks are connected via magnetic conductive bridges. Disadvantages that a conventional single stator has multiple internal excitation sources which are mutually hindered in space and torque density is relatively low can be solved. Besides, high power density is realized by arrangement of double-stator hybrid permanent magnets, and residual magnetization intensity and magnetization direction of the permanent magnets are regulated by applying pulse current so that motor magnetic field high-efficiency regulation is realized, and rotating speed operation range is enhanced.
Owner:SOUTHEAST UNIV
Axial magnetic field stator partitional flux switching memory motor
ActiveCN103715848ASimple structureAxial dimension shortDynamo-electric machinesElectric machineMemory motor
The invention discloses an axial magnetic field stator partitional flux switching memory motor. The memory motor comprises a first rotor (41), a second rotor (42), a stator (1) which is arranged between the first rotor (41) and the second rotor (42), and an installation shaft which is used for coaxially installing the stator (1), the first rotor (41) and the second rotor (42). The stator (1) comprises a stator iron core (2), a number of permanent magnets (3), a three-phase armature winding (5) and a single phase pulse winding (6). The stator iron core (2) comprises a first stator iron core (21) and a second stator iron core (22), wherein the first stator iron core (21) and the second stator iron core (22) have the same structure and are coaxially and oppositely arranged. The stator iron core (2) comprises a stator yoke (2.1) and a stator tooth (2.2). According to the invention, the power density of the motor is improved; the rotation speed operation range is wide; and a no-load air gap magnetic field is adjustable.
Owner:SOUTHEAST UNIV
Permanent magnetic push-pull brushless motor
InactiveCN101499700ASmooth startSmall excitation lossMagnetic circuit rotating partsStructural associationBrushless motorsElectric machine
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.
Owner:王铂仕
Inner and outer double-rotor hybrid excitation doubly salient pole machine
ActiveCN101964571AImprove excitation efficiencyExciting field is easy to adjustMagnetic circuit stationary partsElectric machineDoubly salient
The invention discloses an inner and outer double-rotor hybrid excitation doubly salient pole machine which comprises a salient pole outer-rotor core (1), inner-outer salient pole stator cores (2), a salient pole inner-rotor core (3), a permanent magnet (4), an armature winding (5) and an exciting winding (6), wherein, the armature winding (5) is wound on stator teeth of the inner-outer salient pole stator cores (2); and the permanent magnet (4) or the exciting winding (6) is embedded into the yoke parts of the inner-outer salient pole stator cores (2) at a distance of m*n stator teeth, wherein, m is the phase number of the salient pole machine and n is any positive integer, and excitation polarity of the salient pole machine changes once at the distance of m*n stator teeth. In the invention, a plurality of repetitive structures can be arranged in the motor along the radius direction to form the hybrid excitation motor with n numbered stators and (n+1)-numbered rotors; and the obtained hybrid excitation doubly salient pole machine has high excitation efficiency, short winding head, small excitation loss and simple control circuit.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
E-shaped stator core flux switching type hybrid permanent magnet memory motor
InactiveCN104410180ASimple structureStable structureMagnetic circuit stationary partsElectric machineMemory motor
The invention discloses an E-shaped stator core flux switching type hybrid permanent magnet memory motor and belongs to the field of flux-adjustable permanent magnet motors. Both rotor and stator cores of the motor adopt a salient pole structure. A stator of the motor comprises six E-shaped stator cores, V-shaped aluminum-nickel-cobalt permanent magnets, tangential-magnetizing rectangular neodymium iron boron permanent magnets and a whole layer of stator yokes, wherein adjacent neodymium iron boron permanent magnets with opposite polarities are inlaid between the two adjacent E-shaped stator cores, and a three-phase concentrated winding armature winding is wound across a sandwich-shaped unit composed of the core edges of adjacent E-shaped stator units and the neodymium iron boron permanent magnets; a groove between two adjacent V-shaped aluminum-nickel-cobalt permanent magnets is used for placing a concentrated single-phase pulse winding. The E-shaped stator core flux switching type hybrid permanent magnet memory motor greatly alleviates a space conflict between electromagnetic loading in the stator cores and pulse magnet-adjustment capacity, can realize flexible online magnet adjustment and has little loss of excitation, the torque density and the force and energy expression of the motor can be improved, and the fault-tolerant fault operation ability is good.
Owner:SOUTHEAST UNIV
Biconvex electrode electromotor for magnetic enhancing power generation excitation magnetism
InactiveCN101192785ALow voltage regulation and excitation lossReduce voltage regulation and excitation lossSynchronous generatorsGenerator control by field variationVoltage regulationElectric generator
The invention relates to a double salient electro-magnetic motor for magnetism increasing electricity generation, which is a special electric generator. The negative terminals of all the phases of windings of the generator are connected together, and are led out through a wire; the negative terminals are used as the cathode of the generating system of the double salient electro-magnetic motor. Each phase of the windings is separately connected with the anodes of diodes; the cathodes of the diodes are connected to a point and are led out through a wire; the cathodes of the diodes are used as the anodes of the double salient electro-magnetic motor for magnetism increasing electricity generation. The anode and the cathode of the double salient electro-magnetic motor for magnetism increasing electricity generation are separately connected with the anode and the cathode of a load to supply power for the load. The invention is characterized in that the voltage regulation rate and the excitation loss are reduced by utilizing the magnetism increasing armature reaction of the load, and the invention applies the basic electromagnetic property of the double salient electro-magnetic motor, thereby improving the performance of the double salient electro-magnetic motor for magnetism increasing electricity generation.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Permanent-magnet axial-flux semi-hollow pulse power generator
ActiveCN106505765AImprove efficiencyImprove reliabilityMagnetic circuit rotating partsMagnetic circuit stationary partsMagnetic polesConductive materials
The invention belongs to the field of pulse power generators and discloses a permanent-magnet axial-flux semi-hollow pulse power generator comprising a rotor, a stator, a rotating shaft, a housing, and an end cap. The rotor comprises inner and outer magnetic poles, a permanent magnet and a compensation plate. The permanent magnet is arranged between the inner and outer magnetic poles of the rotor. The inner and outer magnetic poles cooperate with the permanent magnet to convert radial flux into axial flux. The compensation plate covers the tops of the inner and outer magnetic poles. The rotor rotates together with the rotating shaft. The stator is formed by pouring non-magnetic material on a winding and is fixed on the housing. The magnetic conductive material of the rotor and the non-magnetic conductive material of the stator form a semi-hollow structure. The semi-hollow pulse power generator simplifies a motor excitation system, reduces excitation loss, and increases motor efficiency. Brushless structure increases the reliability of the motor.
Owner:HUAZHONG UNIV OF SCI & TECH
Permanent magnet direct driving type explosion-proof variable frequency adjustable-speed motor combined type driving system
PendingCN106849524AIncrease loading capacityIncreased efficiency in the full-speed domainAssociation with control/drive circuitsMagnetic circuit rotating partsFrequency changerElectric machine
The invention relates to a permanent magnet direct drive type explosion-proof variable frequency adjustable-speed motor combined type driving system. The driving system is characterized in that the driving system comprises a permanent magnet direct drive motor, a frequency converter, an explosion-proof housing and water-cooled pipelines, the frequency converter and the motor are distributed up and down, the water-cooled pipelines are scattered in the explosion-proof housing, the water pipelines are overall in series connection, and the frequency converter part comprises a power part and a control part; since a permanent magnet direct drive type driving mode is adopted, a reducer unit is omitted, the load is driven directly, the system driving component is simplified, moreover, the permanent magnet direct drive motor improves the system power coefficient, excitation loss is reduced, and the whole-machine efficiency is improved. Meanwhile, since the system components are less, the maintenance amount is lowered, and the reliability is improved.
Owner:CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO
Three phase four bridge arm matrix type converter having excitation function
InactiveCN101420181ARealize excitation controlSimple designAc-dc conversion without reversalConversion without intermediate conversion to dcMatrix convertersSynchronous motor
The invention discloses a three-phase four-bridge arm matrix typed converter with an excitation function, belonging to the field of power converter. The structure of the converter mainly comprises a hybrid excited synchronous motor, a three-phase four-bridge arm matrix-typed converter and a clamp protection circuit. The converter uses the fourth bridge arm output terminal of the three-phase four-bridge arm matrix-typed converter to be connected with the input terminal of the excitation winding of the hybrid excited synchronous motor, the output terminal of which is connected in parallel with the fixed end of a bidirectional selection switch between the clamp protection circuit buses so as to form the excitation circuit, thus realizing the integral design of the power converter and the excitation circuit. In the invention, the converter not only has the advantages of traditional three-phase AC-AC matrix converter, but also realizes the motor excitation control, thereby reducing the excitation loss of the system and improving the efficiency of the system at the same time.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Double-end hybrid excitation stator-partition-type flux switching motor
ActiveCN106992650AReduce manufacturing costIncreased torque densitySynchronous machine detailsElectric machinesElectric machineRare earth
The invention discloses a double-end hybrid excitation stator-partition-type flux switching motor. The inner surface of a stator yoke of an external stator is provided with armature teeth and excitation teeth alternately at intervals in circumference direction; each armature tooth is wound by an armature winding, and each excitation tooth is wound by an external DC excitation winding; a stator core of an internal stator is uniformly provided with inner stator slots, the number of which is same with that of the armature teeth, in the circumference direction; the inner side of each inner stator slot is embedded by a non-rare-earth ferrite permanent magnet; the outer side of each inner stator slot is placed by an internal DC excitation winding; a stator core between every two inner stator slots is embedded by a rare-earth neodymium-iron-boron permanent magnet; the external diameter of each rare-earth neodymium-iron-boron permanent magnet is equal to the internal diameter of the non-rare-earth ferrite permanent magnet; and the internal diameter of the rare-earth neodymium-iron-boron permanent magnet is equal to the internal diameter of each inner stator slot. The flux switching motor adopts internal and external stator double-end excitation and realizes flexible control of an air-gap magnetic field, has a broader magnetically-adjusting range and ensures higher torque density and power density of the motor.
Owner:JIANGSU UNIV
Power supply system for generating power by utilizing moon in-situ energy
InactiveCN110660497AIn situ utilizationReduce the difficulty of transportationNuclear energy generationPV power plantsGas compressorGamma ray
The invention relates to a power supply system for generating power by utilizing moon in-situ energy. The power supply system comprises a nuclear reaction power generation system, and the nuclear reaction power generation system comprises a nuclear reactor, an intermediate molten salt ring, a turbine, a high-speed motor, a gas compressor, a heat regenerator and a heat radiator. According to the power supply system, moon surface thorium-rich Kreep rock is collected and refined, so that in-situ utilization of energy is realized, and the transportation difficulty and cost of primary ore are greatly reduced; on the basis of maintaining the neutrons of the nuclear reactor not to escape, released gamma rays are subjected to photoelectric reaction to further generate electric energy, so that theworking efficiency of the nuclear reactor is further improved. The power generation scheme is based on closed helium circulation, and compared with traditional thermoelectric power generation, the advantages are that: the efficiency of power generation can reach 25-40%; internal circulation of a circulating working medium can be realized, no substance is exchanged with the outside, and the environmental adaptability is good; meanwhile, due to the rotary working characteristic, the energy density is high, and miniaturization is easy; based on the characteristics of large day and night temperature difference, vacuum and low-gravity environment on the surface of the moon, a power station energy storage mode taking a rotary flywheel as an energy storage link is provided.
Owner:BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
Dual feedback mixed magnetic pole permanent magnetic motor
InactiveCN101478207ASimple structureNo segmentation requiredWindingsMagnetic circuit rotating partsLow voltageHarmonic control
A double-feed composite magnetic pole permanent-magnet electric motor belongs to the technical field of electric motors. The electric motor comprises a stator core installed in a machine housing, a stator comprising a machine winding, a rotor provided with a magnetic pole, a rotating shaft and a stator core; the machine winding comprising a main winding and a harmonic wave control winding and distributed in a stator groove; the magnetic pole of the rotor, which comprises a permanent magnetic pole and a ferromagnetic pole; the winding is arranged on the rotor, and number of poles of the main winding is equal to that of the rotor; the number of poles of the harmonic wave control winding is equal to that of the ferromagnetic pole; the double-feed composite magnetic pole permanent-magnet electric motor has the advantages of simple structure, high reliability, high power density of the electric motor, low voltage waveform distortion factor, no axial magnetic circuit and additional air gap, short magnetic circuit, small excitation loss and high efficiency, therefore, the optimization design of magnetic circuit distribution and the machine winding is facilitated; the two-way control of increasing and reducing magnet is achieved for the harmonic control winding current, high capacity to adjustment of magnetic field is provided, and the electric motor is ensured to meet the requirement for wide range of the running speed.
Owner:NANCHANG UNIV
Salient pole wound rotor asynchronous motor
InactiveCN101369747AHigh rotor winding utilizationReduced rotor excitation lossMagnetic circuit rotating partsManufacturing stator/rotor bodiesPhysicsAc current
A salient pole wound rotor asynchronous motor includes two parts of stator and rotor. The stator is composed of an armature core stacked by grooving silicon steel sheet and m1 phase P symmetrical alternating current winding embedded in the iron-core groove; the rotor is provided with np convex magnetic poles locating on the circumference uniformly and back yoke iron, wherein the np meeting the relation: 2P < np < 4P, and the np being the power function of the rotor phase number m2. An AC coil is embedded on each of the rotor salient pole, np salient poles correspond to np AC coils, which are divided into m2 groups on relative positions in the central line of the salient poles in a air-gap magnetic field, the coils of each group being linked to form phase windings based on the polar of the magnetic field; and infusing symmetrical AC current with rotary difference frequency of m2 into the rotor m2 phase windings. The motor of the invention can improve operation performance of the salient pole wound rotor asynchronous motor, and be suitable for the fields of wind power generation, hydraulic power generation and industry velocity modulation and the like.
Owner:TSINGHUA UNIV
Hybrid excitation permanent magnet motor with secondary harmonic excitation
ActiveCN101976923ASimple structureImprove reliabilitySynchronous machine detailsMagnetic circuit rotating partsHarmonicPermanent magnet motor
The invention relates to a hybrid excitation permanent magnet motor with secondary harmonic excitation, which is characterized by comprising a housing, wherein a stator consisting of a stator iron core and a stator winding and a rotor consisting of a permanent magnet, a rotating shaft, a rotor iron core and a rotor winding are configured in the housing; the stator iron core is fixed in the housing, the stator winding is distributed in a groove which is formed on the stator iron core along the circumferential direction; and the rotating shaft is connected with the housing by rotation, the rotor iron core is arranged on the rotating shaft, the permanent magnet and the rotor winding are arranged on the rotor iron core, the permanent magnet, the rotor winding and the rotor iron core can rotate along with the rotating shaft, and the rotor winding consists of a secondary harmonic winding and a rotor excitation winding.
Owner:浙江清岭科技有限公司
Double-winding bearingless magnetic flux switching permanent magnet motor
InactiveCN107134866AImprove stabilityImprove reliabilityMagnetic circuit rotating partsMagnetic circuit stationary partsElectrical polarityThree-phase
The invention discloses a double-winding bearingless magnetic flux switching permanent magnet motor comprising a stator, a rotor and windings. The stator and the rotor have a doubly salient structure and have the axial symmetry. The stator and rotor iron cores are formed by silicon steel plates through lamination. The stator iron core is formed by six U-shaped lamination plates. A tangentially and alternately magnetized permanent magnet is embedded between every two U-shaped lamination plates so as to form a stator tooth together. The windings are centralized windings and are installed on the stator teeth, and the end parts of the windings are small. There are two sets of windings. As for one set of windings, the coils on the two spatially opposite stator teeth are successively connected in series in an end-to-end way to form a phase so as to form the three-phase torque control windings; as for the other set of windings, the coils on the two spatially opposite stator teeth are reversely connected in series to form a phase so as to form the suspension force control windings, and the polarity of the adjacent sides of the adjacent permanent magnets is identical. The double-winding bearingless magnetic flux switching permanent magnet motor has the characteristics of high speed, high power, high efficiency, high power density, high operation stability and high reliability.
Owner:TIANJIN UNIV
Magnetic suspension and magnetic drive multi-axis flexible transposition device
ActiveCN107020478AAvoid errorsAvoid energy lossWelding/cutting auxillary devicesAuxillary welding devicesMagnetic tension forceEngineering
The invention discloses a magnetic suspension and magnetic drive multi-axis flexible transposition device. The device can achieve magnetic force suspension, magnetic force drive rotation and horizontal movement through the arrangement of a suspension device, a rotation device and a horizontal movement device. After the device stably works, no mechanical contact exists among the structures in the horizontal movement and rotation process, abrasion caused by mechanical friction is avoided, and the problem of platform shaking caused by crawling and uneven track connectors due to mechanical contact is solved. When the device is used for welding, the welding requirement for welding lines of any lengths can be met, welding curve welding is achieved through coordination of the rotation speed and the horizontal movement speed, and excellent dynamic response and motion precision are achieved. The magnetic suspension and magnetic drive multi-axis flexible transposition device is suitable for precise welding, movement and rotation of workpieces such as complex and small flanges and end sockets, and meanwhile the magnetic suspension and magnetic drive multi-axis flexible transposition device is suitable for cutting, checking and the like of medium-small-sized workpieces.
Owner:NANJING UNIV OF SCI & TECH +1
UPS circuit
InactiveCN104882913AReduce lossSmall excitation lossBatteries circuit arrangementsElectric powerConductor CoilSecondary side
A UPS circuit, comprising a low frequency transformer (TX) and a battery (B), the low frequency transformer (TX) comprising a primary side winding, and a secondary side winding connected to the battery (B); the primary side winding is connected to a municipal power loop via a switching device (SW), and the switching device (SW) can operate in a chopping mode.
Owner:EATON MFG LP GLASGOW SUCCURSALE DE MOR
Dry type voltage transformer for switchgear
ActiveCN103578725ASmall excitation lossHigh dielectric strengthTransformers/reacts mounting/support/suspensionTransformersOvervoltageTransformer
The invention relates to a dry type voltage transformer for switchgear. The dry type voltage transformer for the switchgear is characterized in that balancing windings with the number of turns identical to the geometric dimensioning are arranged on two core columns of a rectangular iron core; cascade type high voltage primary windings with the number of turns identical to the geometric dimensioning and in tandem connection are arranged outside the two balancing windings; a series connection joint is in equipotential connection with the iron core; a low voltage secondary winding is arranged outside one high voltage primary winding; an insulating hoisting element is arranged on a low voltage winding side; one end of the insulating hoisting element is fixed on an iron yoke of the iron core; damping shielding layers with certain radius of curvature and thickness are arranged outside the high voltage primary windings, the low voltage secondary winding, the exposed iron core, high voltage leads and low voltage leads; an insulating conservation body is arranged outside a dry type voltage transformer body; an aluminum film layer and stainless steel are sequentially arranged on the surface of the insulating conservation body which is arranged outside an air chamber of the switchgear. The dry type voltage transformer for the switchgear has the advantages of enabling excitation loss of the iron core to be reduced, being small in unload current and high in overvoltage bearing capability and satisfying 66 KV switchgear requirements for utilization.
Owner:DALIAN NO 1 INSTR TRANSFORMER
Single-phase permanent-magnet synchronous motor for efficient fan
InactiveCN102163898AImprove efficiencySmall excitation lossMagnetic circuit rotating partsSynchronous machines with stationary armatures and rotating magnetsSynchronous motorPermanent magnet synchronous motor
The invention relates to a single-phase permanent-magnet synchronous motor for an efficient fan, comprising a stator and a rotor, wherein m squirrel-cage guide bar grooves a, n squirrel-cage guide bar grooves b, and 2p magnet insertion grooves are arranged on a rotor iron core, wherein m is a natural number from 8 to 36, n is a natural number from 2 to 8, and p is a natural number from 1 to 4; the squirrel-cage guide bar grooves a and the squirrel-cage guide bar grooves b are arranged on periphery of the rotor iron core; the magnet insertion grooves are symmetrically arranged on the rotor iron core; and permanent magnets are disposed in the magnet insertion grooves. In comparison with the prior art, the single-phase permanent-magnet synchronous motor in the invention has the advantages of low abrasion, is capable of improving efficiency of the fan, and the like.
Owner:SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD
Electromagnetic-coupling excitation speed regulator
InactiveCN101764499AImprove transmission efficiencySimple structureDynamo-electric gearsAsynchronous induction clutches/brakesElectromagnetic couplingExcitation current
The invention discloses an electromagnetic-coupling excitation speed regulator. The speed regulator is connected between a motor and a load, and comprises an outer rotator, an inner rotator and excitation windings. The inner surface of the outer rotor is uniformly provided with a plurality of conducting bar grooves in the axial direction, a squirrel cage conducting bar is arranged in the conducting bar groove, and a closed loop is formed by the squirrel cage conducting bars through end rings. The outer surface of the inner rotator is provided with a plurality of winding grooves, and the excitation windings are arranged in the winding grooves between magnetic poles. When the excitation windings are energized, the outer surface of the inner rotator generates a plurality of pairs of magnetic poles with N and S alternation, while the outer rotator and the inner rotator rotate together after electromagnetic coupling, and the excitation current is changed, thereby regulating the speed. The invention reduces the excitation consumption, enhances the transmission efficiency, is simple in structure and assembly, has no harmonic pollution on networks, prolongs the service life, and decreases the cost.
Owner:陈品森 +1
Hybrid excitation multi-phase reluctance motor and power generation system
ActiveCN110545021AReduce volumeReduce weightSynchronous machine detailsElectric machinesFlywheel energy storageNew energy
The invention relates to a hybrid excitation multi-phase reluctance motor and a power generation system, belongs to the field of motors, and solves the problem of narrow adjustment range of the magnetic field of the existing hybrid excitation reluctance motor. The air gap magnetic field is adjustable and the excitation loss is reduced by using the hybrid excitation electromagnetic structure of joint excitation of current and permanent magnets. The excitation winding and the armature winding are both arranged on the stator, and there is no brush or slip ring on the rotor. The system has high reliability and convenient maintenance, and the structure of the motor is changed by changing the winding mode of the excitation winding and the armature winding and the permanent magnet distribution mode. The system is suitable for the fields of power supply of airplanes, ships and locomotives, power generation of new energy sources such as wind energy, solar energy, ocean wave energy and the like,flywheel energy storage, electric vehicle drive and the like.
Owner:HARBIN INST OF TECH
A permanent magnet and variable reluctance parallel hybrid excitation brushless motor
ActiveCN105048740BRealize demagnetizationSmall excitation lossMagnetic circuit rotating partsMagnetic circuit stationary partsBrushless motorsConstant power
The invention relates to a permanent magnet and variable reluctance parallel mixed excitation brushless motor. The stator includes the stator core of the permanent magnet part, the stator core of the variable reluctance part, the non-overlapping concentrated armature winding embedded in the slots of the two parts of the stator, and the field winding wound on each stator tooth of the variable reluctance part; the rotor It includes the rotor core of the permanent magnet part and the permanent magnet embedded in it, and the salient pole rotor core of the variable reluctance part without winding. The stator and rotor of the permanent magnet part and the stator and rotor of the variable reluctance part are spaced apart on the left and right sides of the casing. The two parts of the magnetic circuit do not affect each other. The two rotors rotate coaxially. The two parts of the stator core A set of armature windings is shared; the back EMF of the motor has a high sine degree, and it can be used as an alternator / motor or as a DC generator / motor, which broadens the constant power range of the permanent magnet motor and solves the problem of permanent magnet generator Difficult voltage regulation and complete demagnetization due to short-circuit faults have broad application prospects in aircraft power starting / generating systems.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Brushless excitation air core pulse generator
InactiveCN107482870AImprove reliabilitySimplify the excitation systemDynamo-electric machinesExcitation currentNegative phase
The invention discloses a brushless excitation air core pulse generator, which belongs to the technical field of generators. The brushless excitation air core pulse generator, in the structure, comprises an air core stator base, an air core rotor base, a generator excitation winding, a generator armature winding, an exciter armature winding, an exciter excitation winding, a rotation shaft, a binding sleeve, a housing and an end cover. The brushless excitation air core pulse generator is divided to two parts of the generator and the exciter; the rotor winding is formed by the generator excitation winding and the exciter armature winding and is integrally cast through epoxy resin and is connected with the air core rotor base, and both are multi-phase windings and are in negative-phase-sequence connection. Thus, the frequency of the armature winding of a magnetic field cutting generator in a generator can be improved, the induction potential of the generator armature winding can be increased, the air core pulse generator is brushless, the whole reliability and the safety of the motor are improved, the excitation current upper limit is increased, and the energy storage density and the power density of the motor can be improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Permanent direct-current electric welding and electricity generating multipurpose machine
ActiveCN101626176ASolve the phenomenon of broken arcImprove output voltage waveformMechanical energy handlingStructural associationElectricityEngineering
The invention relates to a permanent direct-current electric welding and electricity generating multipurpose machine which comprises a rotor and a stator with a machine seat. An extending end of the rotating shaft of the rotor is provided with a belt pulley; the other end part of the rotating shaft is provided with an air inlet rotary vane; a machine shell is provided with an air inlet port corresponding to the end part; one side of the rotating shaft close to the belt pulley is provided with a radial vane positioned in the machine shell; a corresponding side part of the machine shell is provided with a radiating hole; the front end part and the rear end part of the rotor are also provided with radial torsion vane; and a corresponding side of an outer stator is fixedly connected with a radial air guiding vane. The permanent direct-current electric welding and electricity generating multipurpose machine has the advantages of small volume, little excitation loss, simple structure and small ripple factor of output voltage and solves the problem of arc interruption in electric welding.
Owner:福建福凯电气有限公司
Mixed excitation magnetoelectric machine adopting harmonic excitation
ActiveCN101651394BSimple structureImprove reliabilityWindingsMagnetic circuit rotating partsRotor magnetsHarmonic
Owner:浙江清岭科技有限公司
Electromagnetic coupling excitation speed governor
ActiveCN101902117ASmall excitation lossImprove transmission efficiencyDynamo-electric gearsAsynchronous induction clutches/brakesPhysicsPower grid
The invention discloses an electromagnetic coupling excitation speed governor which is connected between an electric motor and a load and comprises an outer shell, an outer rotator, an inner rotator and an excitation winding. The outer rotator is a magnetizer in a whole cylindrical structure, one end of the outer rotator is connected with an output shaft of the electric motor, and a conductor for generating an induction current is arranged on the inner surface of the outer rotator. When the excitation winding is energized, a plurality of pairs of magnetic poles between an N phase and an S phase are generated on the outer surface of the inner rotator which rotates together with the conductor of the outer rotator through electromagnetic coupling, and the aim of controlling speed is achieved by changing an excitation current. The speed governor can lessen the excitation loss, improve the transmission efficiency, has simple structure and assembly without harmonic pollution to a power grid, not only prolongs the service life, but also decreases the cost.
Owner:上海鑫扬电器有限公司
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