150 results about "Superconducting electric machine" patented technology

A cryogenic cooling system for use with a superconductive electric machine includes a first set of components arranged in a first circuit and adapted to force flow of a cryogen in the first circuit to and from a superconductive electric machine and being operable in a cooldown mode for cooling the cryogen and thereby the superconductive electric machine to a normal operating temperature, and a second set of components arranged in a second circuit and adapted to force flow of a cryogen in the second circuit to and from the superconductive electric machine and being operable in a normal mode for maintaining the cryogen and thereby the superconductive electric machine at the normal operating temperature.

A high-temperature superconducting magnetic levitation motor is formed by a superconducting motor rotor (1), a motor stator (2), superconducting bearing rotors (3), permanent magnetic bearing stators (4), a rotary dewar (5), an electromagnetic screen (6), torque tubes (7), mechanical protection bearings (8), a main shaft (9), a low-temperature liquid (gas) inlet pipeline (10) and a low-temperature liquid (gas) outlet pipeline (11). The superconducting motor rotor (1) and the superconducting bearing rotors (3) are arranged in the rotary dewar (5) and are cooled by liquid nitrogen or liquid neon or liquid helium or cold helium, the motor stator (2) and the permanent magnetic bearing stators (4) are arranged outside the rotary dewar (5) and are coaxial with the rotary dewar (5), and the two mechanical protection bearings (8) are used in a left and right mode in the radial direction for protecting against the influence brought by the failure of superconducting bearings.

A superconducting electrical machine has rotor and stator assemblies. A first rotor assembly is located to rotate within a stator assembly and is spaced from the stator assembly by an air gap. A second rotor assembly is located to rotate outside the stator assembly and is also spaced from the stator assembly by an air gap. The first and second rotor assemblies have at least one superconducting field winding. The superconducting field windings are formed from a High Temperature Superconducting (HTS) material such as BSCCO-2223 or YBCO, for example. The double rotor assembly configuration provides a new technical effect over conventional rotating superconducting machines having a single rotor assembly.

The invention relates to the field of superconducting technologies and the field of motor technologies, and particularly relates to a high-temperature superconducting motor. The motor comprises an electromotor and a generator, an armature winding is manufactured by winding a high-temperature superconducting wire, and a current passing through the armature winding has an alternating component. A refrigerating Dewar vessel of the motor is placed on the outside of a stator core, and cools a high-temperature superconducting coil in a contact conduction refrigerating mode. No heat insulating layer is arranged between a stator and a rotor of the motor, and an inner cavity of the motor is pumped as a low-vacuum cavity, so that no heat convection and no heat conduction are formed between the stator and the rotor. The torque transmission between the inside and outside of the vacuum cavity is realized through a magnetofluid sealing part. Stator windings are distributed in a centralized winding form. The coil adopts a runway coil or a rounded square coil, and no space mutual-interference situation occurs at the end part of the coil; a low-frequency alternating current is used, so that the loss is reduced; and due to the low-frequency characteristic, the motor is especially applicable to the fields such as wind power generation, marine propulsion power, and the like.

A magnetic levitation device and measurement method used for measuring the angle of spherical rotor polar axes, including low-temperature Dewar (8), superconducting suspension coil (5), superconducting niobium-rotor (1), niobium watts (2), superconducting motor (6), torque (7), centre column (9), copper (10), polar axes optical fiber sensor (3) and rev speed optical fiber sensor (4). The Superconducting niobium-rotor (1) is arranged in the spherical cavity formed by the upper and the lower relative niobium watts whose inner surfaces are spherical, and sleeves on the center column (9); two circular superconducting coils (5) are sleeved on the upper and the lower Niobium watts (2). The top of the rotor is produced into plane with diffuse reflection graphic. Two optical axis of the optical fiber sensor are perpendicular to the top plane of rotor and fix in the copper (10). The measurement method of the invention is used for measuring the angle of spherical rotor polar axes, adopts the non-contact type reflection intensity modulated optical fiber sensor to measure the displacement offset signal of the rotor polar axes, and uses the sophisticated two-phase lock-in amplifier to process signal, which has high precision.

A high temperature superconducting synchronous motor having an inductor topology that increases the air gap flux density in direct relation to motor power density by trapping flux and concentrating it in the air gap to obtain more power in the same volume or smaller volume for the same power, and whose geometry enables the induction motor to be lighter than superconducting motors without the inductor topology, the motor being positioned in a housing, and the motor comprising: a) stator means having an armature winding to provide a stator field; b) rotor means positioned within the stator field and on which is disposed at least two polygon shaped ring or coil means along the same axis to provide separated and spaced apart relationship field solenoids; c) at least three high temperature superconducting plate means disposed in alternating relationship between the ring or coil means to hold the ring or coil means together to trap magnetic field and shape flux lines; and d) cooling means to cool the superconducting in the rotor to a temperature below the critical temperature of the superconducting plate means.

The invention relates to the technical field of motors, in particular to a high-temperature superconducting motor. The motor comprises an electromotor and an electric generator, wherein an armature winding of the motor is formed by winding high-temperature superconducting wires, current passing the wires has an AC component; and a heat insulated layer of the motor is arranged on the outer part of the motor, and the heat insulated layer is not arranged between a rotor and a stator of the motor or the heat insulated layer with the thickness of less than 10mm is arranged between the rotor and the stator of the motor. In the concentrated winding scheme and the non-concentrated winding scheme provided by the invention, a spatial mutual interference phenomenon does not exist on the end parts of coils; because low frequency AC is used, the loss is lowered; and the safety and stability of the motor can be effectively guaranteed, and the motor is particularly applied to fields such as wind power generation, propulsion of ships and automobiles and the like.

The invention discloses a superconducting motor with ultra-low loss, which comprises an enclosure, a stator and a rotor, wherein the rotor is in an iron-core-free structure and mainly comprises a pole shoe, a rotor spider and a hollow rotating shaft; the pole shoe is wound with an exciting winding; the exciting winding is a superconducting coil; for the stator, a cooling tube is arranged in each stator slot based on the traditional structure; the enclosure comprises a housing; a spiraltron is wound on the outer side of the housing; a heat-proof radiation layer is arranged on a tooth surface of the stator; and cooling media are charged into the spiraltron, the cooling tubes, collecting tubes and the hollow rotating shaft. The superconducting motor with the ultra-low loss is very low in motor loss; the efficiency of the superconducting motor can reach above 99%; no dewar is arranged in an air gap; and the small air gap becomes possible; the motor is low in heat leakage and high in power density; and the refrigeration cost is low.

The present application and the resultant patent provide a superconducting electrical machine. The superconducting electrical machine may include an armature coil made of a high temperature superconducting material, a cooling system, and a field coil. The cooling system may include a cryostat surrounding the armature coil and a foam insulation surrounding the cryostat.

Disclosed is a high-power, fully-superconducting electric machine and major subcomponents including a dual (twin) superconducting, counter rotating, sub-scale bypass fan machine, 13-stage switched reluctance turbo-motor, electric compressor, annular ion-plasma combustor with electromagnetic electrodes, and a five stage superconducting counter-rotating turbine power generation machine which is capable of developing 2.5 MW per stage.

The invention provides a directly-drive wind power generation system composed of a high temperature superconductive excitation magnetic flux switchover motor. The directly-drive wind power generation system comprises a wind turbine, a high temperature superconductive excitation magnetic flux switchover motor, an uncontrollable rectifier module, a battery pack module, a direct current converter module, an inverter module, a grid-connected transformer, an operation mode control module and a central control unit. The directly-drive wind power generation system is small in volume, light in weight, high in efficiency, multiple in operation mode and good in an adaptability; as the high temperature superconductive excitation magnetic flux switchover motor is adopted as a generator, the characteristics that a high temperature superconductive winding is adaptive to a direct current is brought into play, and the rotational connection necessary for a conventional rotor excitation type high temperature superconductive motor is avoided; the directly-drive wind power generation system is simple in structure; a generator stator adopts a modularization structure, thereby being convenient for transportation and on-site installation; as the directly-drive wind power generation system can run in a switch magnetic reluctance motor generation mode, the phenomenon of quench of the high temperature superconductive material is prevented effectively; and the reliability of the system is improved effectively.

The invention provides a superconducting claw-pole motor. A stator part comprises a hollow support shaft, n superconducting exciting winding supports and a Dewar structure, wherein the n superconducting exciting winding supports and the Dewar structure are fixed on the hollow support shaft, a superconducting exciting winding is arranged in each exciting winding support, and a refrigerant pipe and a superconducting outgoing line are arranged in the hollow support shaft; a rotor part comprises a rotor shaft and n rotor magnet yoke sets; and each rotor magnet yoke set comprises an A magnet yoke and a B magnet yoke, claw poles on the two magnet yokes are distributed in a staggered mode and oppositely buckled on the two sides of a corresponding superconducting exciting winding, and the rotor shaft and the n rotor magnet yoke sets can rotate synchronously around the central axis of the rotor shaft. Motors in different power levels can be implemented through expanding the diameters along the radial direction or increasing the number of superposed claw pole assemblies along the axial direction. According to the invention, under the premise of meeting the operation of superconducting motors, the superconducting claw-pole motor disclosed by the invention has the characteristics of simple structure, low cost, easy machining, direct power-supply connection of exciting windings, no carbon brush or induced circuit required, small weight and size, and the like, and improves the reliability and efficiency of systems.

A transverse flux high-speed superconducting motor system is provided to solve the problem concerning practical application of a miniature high-speed and high-power-density superconducting motor. The transverse flux high-speed superconducting motor system comprises a stator external magnetic ring, a superconducting coil assembly, a stator special-shaped magnetic block, a rotor magnet steel group, a rotor, and a rotating shaft. According to the superconducting motor, the resistance-free characteristic of a superconducting winding is utilized, and intermittent direct current is fed in. The outer diameter of the superconducting motor is reduced based on the mechanical property of an annular superconducting winding, and the direct current carrying capacity of the superconducting winding and the speed of the superconducting motor are improved based on the quench and recovery characteristic of the superconducting winding. The scope of application of the superconducting motor in the field of high-speed motors is expanded.

The invention provides a high-temperature superconducting coil magnetic field measuring method, which comprises the following steps of: winding an electric heating wire on the outer surface of a magneto-optical crystal optical fiber magnetic field sensor, connecting a thermocouple with the magneto-optical crystal optical fiber magnetic field sensor, and arranging the thermocouple in a vacuum Dewarto obtain a composite optical fiber magnetic field sensor; connecting the composite optical fiber magnetic field sensor with a signal acquisition device, wherein the signal acquisition device transmits an acquired signal to a computer; connecting the composite optical fiber magnetic field sensor with a signal control device to generate a control signal and transmitting the control signal to the composite optical fiber magnetic field sensor; arranging the composite optical fiber magnetic field sensor inside the superconducting coil, arranging the superconducting coil in a low-temperature environment, arranging the signal acquisition device in a room temperature environment. The method can avoid the condition that the sensor is damaged by a strong electromagnetic field and greatly reduces the measurement cost; the magnetic field measurement of high-temperature superconducting equipment such as a high-temperature superconducting magnet, a high-temperature superconducting motor and the like is achieved; the possibility of electrical breakdown of the elements and components is avoided, and the measurement cost is obviously reduced.

The invention relates to a superconducting motor with torque tubes, belonging to the technical field of low-temperature transmission and motors. The superconducting motor comprises a rotary shaft, two torque tubes, a stator and a motor shell, wherein the two torque tubes are fixed at the two ends of the rotary shaft respectively; each torque tube is of a flat annular shape and comprises an outer ring, an inner ring and a support member for connecting the outer ring and the inner ring; the outer ring is fixedly connected with the end surface of a superconducting magnet system at low temperature; the inner ring is fixedly connected with the rotary shaft at normal temperature; the support member is a support rib or support plate; and for the materials forming each torque tube, at least the support member is made from a thermal insulation material. The invention has the advantages that: because each torque tube has the characteristics of high strength, low heat leakage and the like, the demands of the superconducting motor can be met better; and moreover, each torque tube does not occupy the axial length of the rotor, and the motor structure is more compact than that of the torque tube of the prior art, so that the entire motor has smaller volume and lighter weight.

The invention relates to a six-phase static sealing high-temperature superconducting motor, which comprises a still stator and a rotating rotor, wherein the rotor is located in the stator; the stator and the rotor are in a salient pole structure; salient poles of the rotor are outward; the salient poles of the stator are inward; the stator is provided with 24 salient poles; the rotor is provided with 23 salient poles; an air gap is reserved between the stator and the rotor; and 12 armature windings and 12 high-temperature superconducting excitation windings are alternately wound on the salient poles of the stator along the circumferential direction of the stator. The six-phase static sealing high-temperature superconducting motor improves the power level of the motor, reduces the cost and the control difficulty of a power converter and achieves static sealing of a cooling medium. The six-phase static sealing high-temperature superconducting motor is simple in structure, low in cost, good in cooling effect and high in operation reliability.

A shaft assembly and method for reducing the heat leak into the cryogenic region of a superconducting electrical machine comprising a rotor shaft extension assembly capable of transmitting large amounts of torque with substantially increased thermal impedance. The shaft assembly contains a plurality of concentric structural cylinders composed of high strength, low thermal conductivity structural materials. The structural cylinders are connected in series by means of welded joints or strong interlocking “finger” connections, in such a way that the coldest cylinder is connected to the cryogenic machine. An optional intermediate heat sink that allows the shaft extension member to rotate freely within the confines of the heat sink further reduces the heat leak into the cryogenic environment. Splined adapter hubs are typically used to connect the cylinder assembly to the rotor of the superconducting machine and the external device.

The invention relates to a magnetic field shielding device of a high-temperature superconducting coil, which solves the problem that the current carrying capacity of a high-temperature superconducting coil used as an armature winding in a high-temperature superconducting motor is limited by an additional vertical magnetic field. The magnetic field shielding device comprises a cryostat, a vacuum container, a first magnetic conduction sheet and a second magnetic conduction sheet, wherein the high-temperature superconducting coil is fixed in the cryostat; the cryostat is fixed in the vacuum container; liquid nitrogen is introduced into the cryostat; the first magnetic conduction sheet and the second magnetic conduction sheet are respectively fixed above and below the axial direction of the high-temperature superconducting coil; and the width of the first magnetic conduction sheet and the width of the second magnetic conduction sheet are 1.1-1.5 times of the thickness of the high-temperature superconducting coil. The device of the invention can enable the original vertical magnetic field of the surface of the high-temperature superconducting coil to be reduced by more than 50%, and is used for shielding the vertical magnetic field of the surface of the coil.

Stators 12 and 13 are disposed with required air gaps in an axial direction of a rotor 11 so as to face each other, a plurality of field bodies 15 or permanent magnets 33 are disposed in the rotor 11, and a plurality of armature coils 17 and 19 are disposed in the stators 12 and 13 around the axis. At least one of the field bodies 15 or permanent magnets 33 and the armature coils 17 and 19 are formed from a superconductive material such that their magnetic flux directions are directed to the axial direction.

The invention relates to a high temperature superconducting motor magnet performance test device, which comprises magnetic conducting side plates and a magnetic conducting circular arc top plate, wherein the two magnetic conducting side plates form a 'V'-shaped angle and form a magnetic conducting loop with the a magnetic conducting circular arc top plate; the magnetic conducting side plates, the magnetic conducting circular arc top plate and stainless steel end plates on two ends form a vacuum container; vacuum-pumping connectors are arranged on the stainless steel end plates; a heat exchanger is arranged in the vacuum container and is connected with the magnetic conducting circular arc top plate through insulating studs; and the magnetic conducting circular arc top plate is provided with a refrigerant import and export connector communicated with a refrigerant container or a refrigerator. The high temperature superconducting motor magnet performance test device has the advantages that: the problems of larger refrigerant consumption amount, complexity of installation, wiring and other test preparation processes of a magnet, and the like are solved; the cooling method of the magnet is as same as the actual conditions; and the measuring accuracy is improved.

The invention discloses a coreless type megawatt superconducting motor system. The coreless type megawatt superconducting motor system comprises a superconducting rotor of coreless structure, wherein the superconducting rotor of the coreless structure comprises a coil skeleton, superconducting excitation coils and a torque tube connected with the coil skeleton, the superconducting energizing coils are wound around the upper surface and the lower surface of the coil skeleton and wound in convolution U structure, each two adjacent effective excitation edges are parallel to each other and respectively form a positive pole and a negative pole in a pair of magnetic poles, the effective excitation edges of the superconducting energizing coil wound around the upper surface of the coil skeleton and the effective excitation edges of the superconducting energizing coil wound around the lower surface of the coil skeleton are symmetric around the coil skeleton, and exciting current directions of each two effective excitation edges which are symmetric around the coil skeleton are the same. Compared with the prior art, the coreless type megawatt superconducting motor system has better excitation effects and mechanical properties than a track type excitation coil through structure design of the superconducting excitation coils, the support skeleton of the superconducting excitation coils and the torque tube, and can commendably solve the problems of excitation effect reduction, mechanical stress change and support protection reduction of the superconducting excitation coils, generated after iron cores are removed.

In a cooling structure of a superconducting motor in which a superconducting coil is attached to a rotor, grooves are concavely provided on an outer surface of a rotating shaft that penetrates and is fixed to the rotor. A refrigerant is circulated through a refrigerant circulation pipe disposed inside the grooves to that the superconducting coil is cooled by the refrigerant.

The invention discloses a superconducting low-temperature rotary experiment table which comprises a main shaft, a bearing support system, a strong-current slip ring, a weak-current slip ring, magnetic fluid sealing equipment, a driving device and a rack, wherein the bearing support system and the driving device are fixedly arranged on the rack; the main shaft is connected with the bearing support system by virtue of a bearing; one end of the main shaft is connected with and supports a to-be-tested superconducting rotor by virtue of a cantilever, and the other end of the main shaft is connected with magnetic fluid sealing equipment; the strong-current slip ring is adjacent to the to-be-tested superconducting rotor and is arranged on the main shaft in a sleeving manner. The superconducting low-temperature rotary experiment table is capable of reliably supporting the superconducting rotor of a superconducting motor and driving the superconducting rotor to rotate; in a rotation process, a cooling medium, a driving and a control circuit and a sensing circuit can be supplied to a refrigeration system of the superconducting rotor, so that the work conditions of the refrigeration system are ensured, sensing signals of temperature, stress and the like of the rotor are transmitted to the ground, and the superconducting rotor can be replaced conveniently, so the implementation of the refrigeration system of the superconducting motor is met.

In a cooling structure of a superconducting motor in which a superconducting coil is attached to a rotor, grooves are concavely provided on an outer surface of a rotating shaft that penetrates and is fixed to the rotor. A refrigerant is circulated through a refrigerant circulation pipe disposed inside the grooves to that the superconducting coil is cooled by the refrigerant.

A superconducting motor includes: a rotor that is rotatably supported; a stator that is provided around the rotor, and that is provided with a plurality of coils that are respectively formed of superconducting wires and that are wound at an inner periphery of a stator core; and a refrigerator having a cooling portion for cooling the plurality of coils. The cooling portion of the refrigerator is in contact with the plurality of coils.

The invention discloses a fully superconducting electro-magnetic low-speed direct-driven synchronous generator, which sequentially comprises a stator core and a rotor core from the inside to the outside along the radial direction, wherein single-tooth-wound single-layer concentrated superconducting armature windings and single-tooth-wound single-layer concentrated superconducting exciting windings are alternately arranged in each stator slot of the stator core; and the generator also comprises a dewar flask for wrapping the single-tooth-wound single-layer concentrated superconducting armature windings and the single-tooth-wound single-layer concentrated superconducting exciting windings. According to the synchronous generator achieved by the invention, the reliability of a system is improved; exciting superconducting coils and armature superconducting windings are placed on the same stator by the provided structure; and compared with a conventional full-superconducting generator with the same capacity, the volume of a low-temperature container is greatly reduced and the cost of the low-temperature container and a refrigeration system thereof is reduced.

A current lead assembly for a superconducting motor comprises an epoxy base, a first copper lead, a second copper lead, a third copper lead, a fourth copper lead and a copper cover plate. Four mounting sides of the epoxy resin are used for mounting the copper leads and include two concave sides and two convex sides. The first copper lead is mounted on the first concave side. The second copper lead is mounted on the first convex side. The third copper lead is mounted on the second concave side. The fourth copper lead is mounted on the second convex side. The current lead assembly can be serially connected with three superconducting coils; the superconducting coils are sequentially connected with the four copper leads; a superconducting tape of every superconducting coil is serially connected to the copper leads by welding and is fastened with the copper cover plate.

A rotor (or a stator) for a superconducting electrical machine includes a mounting that is maintained at substantially ambient temperature during operation of the electrical machine and a field coil support structure. A plurality of superconducting field coils are maintained at cryogenic temperatures during operation of the electrical machine and are supported by the field coil support structure. At least one coupling element is used to fix the field coil support structure to the mounting. The field coil support structure is preferably fixed to the mounting by a plurality of substantially circumferentially extending coupling elements at a first and second axial end of the field coil support structure and the mounting such that the mounting and field coil support structure are substantially separated over their axial lengths by a vacuum gap.

The invention discloses a magnetic gear motor. The magnetic gear motor comprises a stator iron core, an inner rotor iron core, a low temperature Dewau insulation wall and an outer rotor iron core, wherein the stator iron core, the inner rotor iron core, the low temperature Dewau insulation wall and the outer rotor iron core are coaxial successively sleeved from the inside out. A number of permanent magnets are circumferentially arranged on the inner wall of the outer rotor iron core. A number of magnetic modulation rings are fixedly circumferentially arranged on the outer peripheral surface, which is opposite to the permanent magnets, of the low temperature Dewau insulation wall. The inner rotor iron core is provided with an excitation winding. An armature winding is arranged on the outer peripheral surface of the stator iron core. The magnetic modulation rings can realize magnetic field modulation, so that the permanent magnet magnetic field and the magnetic field generated by the excitation winding are in interaction. The outer rotor iron core drives the inner rotor iron core to rotate, or the inner rotor iron core drives the outer rotor iron core to rotate. The armature winding in the stator iron core generates induced electromotive force, or the energy of the armature winding drives the outer rotor iron core to rotate to realize energy conversion. According to the magnetic gear motor provided by the invention, the magnetic gear structure is introduced into a full superconducting motor; the torque density is increased; rotation leakage is avoided; and the power density and the reliability are improved.

The invention discloses a method applying wireless electric power transmission and magnetic force transmission on a superconductive motor; a frequency converter converts a power frequency power supply into a radio frequency power supply; a transmitting coil emits radio frequency signals; a receiving coil having consistent resonant frequency with the transmitting coil uses coupling resonance induction to form AC current; a rectification inversion unit supplies obtained current to a stator coil so as to form a rotary magnetic field; a rotor winding forms induction current and forms a magnetic field, and the formed magnetic field and the stator rotary magnetic field can mutually work to form a torque; the torque is transmitted to an external load through a magnetic force transmission device. The method uses the wireless electric power transmission technology to transmit the electric power to the stator coil, thus forming the rotary magnetic field in a motor air gap; the magnetic force transmission device can transfer the rotor output torque to the load, thus effectively prevent heat leakage load caused by a current feeder and a machinery transmission shaft, reducing refrigeration requirements on a refrigerating machine, reducing refrigeration system cost and motor operation cost, optimizing a motor system structure, reducing the motor size, and realizing a compact structure.