76results about How to "Short ends" patented technology

The invention discloses a double-stator disc type mixed excitation motor which comprises two stators, a permanent magnet, a three-phase concentrated armature winding, a single-phase concentrated excitation winding and a rotor. The stators and the rotor are arranged coaxially, and the rotor is arranged between the two stators. The permanent magnet, the armature winding and the electric excitation winding are all located on the stators. The rotor is free of the permanent magnet or the windings and simple in structure. An air-gap magnetic field is formed by an electric excitation magnetic field generated by the electric excitation winding and a permanent magnetic field generated by the permanent magnet, and adjusting of the air-gap magnetic field is achieved by changing electric excitation current. The motor structurally reserves the characteristics of a disc type magnetic flux switching permanent magnetic motor of being compact, simple and suitable for high-speed operation, can achieve a mixed excitation function without increasing the motor size additionally and guarantees good torque output capacity and high power density. The motor is small in axial size and suitable for strict and thin type installing in places of a hub driving motor for electromobile and the like.

The invention provides an electric vehicle hybrid excitation hub motor which is composed of a shaft, a hub, rotor poles, stator poles, two sets of armature windings, stator iron cores, excitation windings, permanent magnets and a hub cap. The fan-shaped stator iron cores are fixed in the middle of the shaft in a back-to-back way. The two sides of the stator iron cores are provided with the protruding stator poles. The rotor poles are fixed on the internal walls of the two end surfaces of the hub. One permanent magnet is clamped between every two stator iron cores which are aligned in a circumferential direction. A groove is arranged between the two opposite stator iron cores and used for embedded arrangement of the excitation windings. Each stator pole is provided with the armature windings in a winding way. Integration of the hub and a driving motor is effectively realized by the technology so that the size and the weight of a driving system can be reduced; the rotor has no permanent magnet or excitation winding so that the possibility of demagnetization of the permanent magnets caused by impact can be reduced; a permanent magnetic field can be enhanced by an electric excitation magnetic field at low speed so that high-torque output can be realized; and the permanent magnetic field can also be weakened at high speed so that high-speed weak magnetic control can be realized.

This invention discloses a direct-drive low speed magnetic synchronous wind generator with a sectional module stator structure including a stator core set in sections, in which, the internal circle of the core is divided into k1 fan zone sets uniformly and three phases of A, B and C in each set are in three fan zones in same area, each zone belongs to one phase, K2 teeth are set on the stator core of a zone uniformly, a groove is opened between adjacent two teeth, the teeth distance of which is a pole distance, a holddown is set between the two adjacent stator cores and a full-pitched centralized coil is winded on each tooth of the stator cores, the winding coefficient of the motor is 1, the end of the stator winding is short and easy to be winded mechanically and continuously, the core sections are independent to each other on the base and easy to be exchanged.

The invention discloses a five-phase permanent magnet fault-tolerant motor with a magnetic congregating effect for an electric vehicle. An outer rotor is arranged on a stator outer ring, armature teeth and fault-tolerant teeth are uniformly distributed at intervals along the circumferential direction of the stator outer ring, permanent magnets are uniformly and radially embedded in the direction of the circumference in the outer rotor, a single-layer concentrated winding is wound on the armature teeth, radially opposite dipolar single-layer concentrated windings are serially connected to form one phase; total tooth quantity of the armature teeth and the fault-tolerant teeth is a multiple of 10 and is not equal to the quantity of permanent magnets, and the difference of the total tooth quantity of the armature teeth and the fault-tolerant teeth does not exceed +/-4; rotor grooves with same quantity as the permanent magnets are arranged on the outer rotor and positioned between each of the permanent magnets and the stator; and the width of the armature teeth is two times of that of the fault-tolerant teeth. The flux leakage of the permanent magnets is reduced while a magnetic-gathering effect is generated, the consumption of the permanent magnets is reduced, the motor cost is saved, the motor weight is reduced, and the reliability and the failure operation capacity of the motor is improved.

The invention relates to a mixed excitation stator surface-mounted double-salient motor adopting a modularized rotor, which is characterized in that a stator part adopts a centralized armature winding and a centralized excitation winding, stator teeth are divided into two groups, i.e. a group of stator teeth with permanent magnets and a group of stator teeth being sleeved with armature winding coils, and the armature teeth and the permanent magnetic teeth are alternately distributed. The permanent magnets which are alternately magnetized in the radial direction are respectively mounted on the surface, facing a rotor, of the stator permanent magnetic tooth. Each coil of the armature winding is respectively sleeved on one stator armature tooth, and each coil of the centralized excitation winding is respectively sleeved on one stator permanent magnetic tooth. The structural advantages of the stator surface-mounted double-salient permanent magnet motor such as compact structure and easiness in heat radiation are maintained, a mixed excitation function can be realized without additionally increasing the size of the motor, the strong torque output capacity and high power density of the motor can be guaranteed, the motor is particularly suitable for the application occasion requiring small size and large output torque, and the large torque of a constant-torque area and a wide speed regulation function of a constant-power area can be realized.

The invention discloses a hybrid excitation flux switching motor. The motor comprises an outer stator, a rotor and an inner stator. The rotor coaxially sheaths outside the inner stator. The outer stator coaxially sheaths outside the rotor. The outer stator comprises an outer stator iron core, permanent magnets and a three-phase armature winding. A three-phase alternating current excitation winding sheaths on convex pole teeth of an inner stator iron core. The quantity of the convex pole teeth of the inner stator iron core is equal to the quantity of the permanent magnets. The radial central axes of the convex pole teeth of the inner stator iron core and the radial central axes of the permanent magnets coincide. In the prior art, the excitation winding is placed by reducing the volume of the permanent magnet or reducing the number of turns of the armature winding. Through adoption of the hybrid excitation flux switching motor, the problem in the prior art is solved, the electromagnetic load of the motor is increased, a symmetrical three-phase alternating current with adjustable amplitude accessed to the inner stator excitation winding can generate a rotating magnetic field with adjustable amplitude and polarity, and the rotating magnetic field and an effective air gap magnetic field in a permanent magnetic field are overlaid, so that effective harmonic component in the permanent magnetic field is enhanced or weakened, so as to realize magnetic shunt operation.

The invention discloses a double-speed winding switch reluctance motor. Stator teeth in even number are arranged on a stator, and concentrated windings are arranged on the stator teeth. The concentrated windings comprise low-speed concentrated windings and high-speed concentrated windings, and the number of turns of the low-speed concentrated windings is more than that of the high-speed concentrated windings. The wire diameter of each low-speed concentrated winding is smaller than that of one high-speed concentrated winding, and in two adjacent stator teeth, one stator tooth is coiled with a low-speed concentrated winding, and the other stator tooth is coiled with a high-speed concentrated winding. A low-speed concentrated winding is arranged on the opposite side of another low-speed concentrated winding in the radial direction of the stator, and moreover the two low-speed concentrated windings are connected in series or in parallel to form a one-phase low-speed winding. The opposite side of each high-speed concentrated winding is provided with another high-speed concentrated winding in the radial direction of the stator, and the two high-speed concentrated windings are connected in series or in parallel to form a one-phase high-speed winding. The double-speed winding switch reluctance motor can output large torque in low-speed operation, and has a wide speed regulation range in high-speed operation.

The invention discloses a fault-tolerant type single-winding bearing-less permanent magnet motor. A stator magnet yoke is in a cylinder shape and is placed on the outermost portion of the permanent magnet motor. A rotating shaft and the stator magnet yoke are coaxial, the rotating shaft is placed in the middle in the stator magnet yoke, a rotor iron core coaxial with the rotating shaft is fixed on the outer periphery surface of the rotating shaft, and a plurality of permanent magnets which are evenly distributed on the outer surface of the rotor iron core in a Halbach array structure to form a cylinder shape are fixed on the outer periphery surface of the rotating shaft. Six armature teeth and six fault-tolerant teeth which are arranged in an alternating mode in the periphery direction are fixed evenly on the inner periphery face of the stator magnet yoke. Each armature tooth is provided with a set of an armature winding which generates torque and radial suspension force at the same time in a winding mode. Each set of armature winding is of a concentrating short-distance winding structure. Each phase control current is formed by overlapping of a torque winding control current component and a suspension force winding control current component. According to the fault-tolerant type single-winding bearing-less permanent magnet motor, only one set of armature winding is needed, the structure is simple, motor weight is lowered, and the suspension operation capacity with fault of the motor is improved.

The invention discloses a less-rare-earth multi-excitation-source double-stator flux-switching memory motor, which belongs to the technical field of motor body design and operating principles. Coaxial outer stators, rotors and inner stators are sleeved together in turns from outside to inside to compose the memory motor, wherein a radial air gap exists between the outer stators and the rotors, the rotors and the inner stators, the outer stators are composed of armature core teeth, fault-tolerant teeth and stator yokes, and the rotors are composed of a rotor support, a magnetic silicon steel block and a magnetic insulation block, and meanwhile, the inner stators are composed of the inner stator core and a combined permanent-magnet cell block. The double-stator structure of the motor realizes the separation of armature winding and permanent magnet and solves the problem that multiple excitation sources inside the traditional flux-switching permanent magnet motors restrain each other, thereby easily increasing motor power density and torque density. The memory motor maintains high air-gap flux density and ensures of the motor power density and the torque density, meanwhile, the consumption of rare-earth permanent-magnetic materials is effectively lowered. On the other side, the memory motor can realize flexible adjustment of a motor air-gap field and expand the range of speed operation.

A three-phase double convex pole permanent magnet brushless generator is in the structure of a stator inside and a rotor outside, the magnet and an armature winding are set on the stator fixed on the base by four installing holes, the rotor is connected with the shaft by the shell and a shaft sleeve base, four magnets are distributed uniformly along the circum at the yoke of the stator, the poles of which are distributed in N,S,S,N,N,S,S,N, 12 convex poles are uniformly distributed on the outer circum of the stator, 8 convex poles are uniformly distributed on the inner circum of the rotor and placed on the two face to face poles of the stator and two face to face vertical poles connected with them and the centralized windings of the four poles are serial to one three-phase armature winding in 120deg. difference.

The invention discloses a cross-two-teeth concentrated winding vernier permanent magnetic motor. The cross-two-teeth concentrated winding vernier permanent magnetic motor comprises a stator (1) and a rotor (2), wherein the stator (1) is a cylindrical body, a circumferential wall of the cylindrical body is uniformly distributed with multiple grooves, the grooves are respectively used for accommodating windings, stator teeth are formed at projection portions among the grooves on the circumferential wall of the cylindrical body, the rotor (2) is a circular body, a circumferential wall of the circular body is distributed with multiple permanent magnets with intervals, and an armature winding of the vernier permanent magnetic motor is a concentrated winding crossing two teeth. According to the cross-two-teeth concentrated winding vernier permanent magnetic motor, compared with a traditional vernier motor, a winding crossing distance is substantially reduced , an end portion is shorter, copper consumption of the motor is effectively reduced, a motor volume is reduced, and motor efficiency is improved; the cross-two-teeth concentrated winding is employed, an ultimate ratio of the vernier motor is reduced to be in a range of 2-5, a power factor of the motor can be improved to be greater than 0.8 on the condition that output torque loss is relatively small.

A photonic device incorporate an epitaxial structure having an active region, and which includes a wet etch stop layer above, but close to, the active region. An etched-facet ridge laser is fabricated on the epitaxial structure by dry etching followed by wet etching. The dry etch is designed to stop before reading the depth needed to form the ridge. The wet etch completes the formation of the ridge and stops at the wet etch stop layer.

The invention discloses a DC bias type flux reverse permanent magnet motor, which comprises a permanent magnet stator and a salient pole iron core rotor. An independent air gap is formed between the permanent magnet stator and the salient pole iron core rotor; the permanent magnet type stator comprises a stator yoke part and a plurality of stator teeth, wherein the stator yoke part and the plurality of stator teeth form a plurality of stator slots; armature windings are placed in the stator slots; bias direct current is injected into the armature windings; a permanent magnet is arranged at theslot opening of each stator slot; the permanent magnets and the adjacent stator teeth form a pair of magnetic poles; and the number and the magnetizing modes of the permanent magnets at the slot openings of the stator slots are the same. Multi-harmonic simultaneous work of the stator armature windings can be achieved, motor magnetic field adjustment is achieved by controlling positive and negative injected direct currents, and the motor is quite suitable for high-power demand occasions such as wind power generation and electric vehicles.

The invention provides a permanent magnet synchronous machine (PMSM) possessing an assembled magnetic effect. The PMSM comprises a stator and a rotor. Air gaps exist between the stator and the rotor. The stator includes a stator core and a stator winding. The rotor includes a rotor core, a rotating shaft and permanent magnet steel. The stator winding is a centralized winding. The rotor is an eccentric rotor. Ends of the permanent magnet steel are directly connected with each other. The air gaps between the stator and the rotor are non-uniform air gaps. The invention has the following positive effects that: (1) distribution of air-gap flux density can be optimized through improving a rotor structure and the air gap flux can be very close to a sinusoidal waveform by using the non-uniform air gaps; (2) magnetic flux leakage on the ends can be effectively reduced because the ends of the permanent magnet steel are directly connected with each other, and simultaneously a magnetic isolation bushing is not needed to be installed on a rotating shaft side so that a requirement of a rotating shaft material can be reduced, wherein the rotating shaft can adopt a magnetic conductive material and/or a non magnetic conductive material.

The invention discloses a mutual inductance coupling type switch magnetic resistance motor, which is in a double-salient-pole structure, wherein salient pole teeth are respectively arranged on a stator and a rotor, but the number of the salient pole teeth on the stator and the number of the salient pole teeth on the rotor are different. An integrated winding coil is wound on the stator teeth, a multiphase symmetrical winding structure is formed, the coil adopts double-layer coil edges, i.e., two ring edges belonging to different coils are placed in each stator groove, all of the coils of the winding maintain the same winding direction, i.e. after the introduction of current in the same direction, the polarities of flux linkage of all stator poles are identical, the self inductance and the mutual inductance of each phase of winding of the motor can be periodically changed along with the position change of the rotors, i.e., the motor can work simultaneously through the reluctance torque generated through the self inductance and mutual inductance change. The invention further discloses a control method of the mutual inductance coupling type switch magnetic resistance motor. The mutual inductance coupling type switch magnetic resistance motor has the advantages that the material utilization rate of the motor can be improved, the torque pulse of the motor is effectively inhibited, and the motor control mode is more flexible and diversified.

The invention discloses a single-layer concentrated winding DC injection type cursor reluctance machine. The single-layer concentrated winding DC injection type cursor reluctance machine comprise a stator (1), a rotor (2) and windings (3), wherein the stator (1) and the rotor (2) are both of salient pole structures, the single-layer concentrated winding DC injection type cursor reluctance machine is characterized in that the windings (3) are single-layer fractional-slot non-overlapping concentrated windings, a current in each winding comprises a sine AC component and a DC component, the sine AC component is used for generating a rotation magnetic potential, and the DC component is used for generating a rotation magnetic field. The reluctance machine is a single-layer winding, and no inter-insulator is needed. Compared with the prior art, the single-layer concentrated winding DC injection type cursor reluctance machine has the advantages that the space factor can be improved, and the torque density of the machine is further improved; and moreover, compared with the prior art, the single-layer concentrated winding DC injection type cursor reluctance machine has the advantages that the least common multiple of the stator Z1 and the rotor slots Z2 of the reluctance machine proposed by the invention is improved, and the torque pulse is reduced below 30%.

The invention discloses an axial magnetic field consequent pole brushless hybrid excitation motor, which comprises an axial rotor, and is characterized in that permanent magnet N poles distributed in an array are fastened in one side of the axial rotor, permanent magnet S poles distributed in an array are fastened on one side of the axial rotor, one side of the axial rotor is fixedly provided with iron core poles which are distributed in an array mode, one side of the axial rotor is provided with an axial stator, the axial rotor and the axial stator are coaxial, an air gap is formed between the axial rotor and the axial stator, one side of the axial stator is provided with an armature winding in a fastening mode, and the armature winding is close to the air gap. An alternating-current excitation winding for realizing brushless excitation is fastened between the armature winding and the axial stator, the armature winding and the alternating-current excitation winding are wound on the axial stator, and the armature winding and the alternating-current excitation winding are coaxial. According to the motor, the alternating-current excitation winding is adopted, an electric brush and a slip ring are omitted, brushless excitation is achieved, the cost of the motor is reduced, and the reliability is improved.

The invention discloses a bearingless permanent magnet sheet motor. A circular-cake-shaped rotor permanent magnet is coaxially and fixedly connected to the axial top surface of a cross-shaped sheet rotor with a cross-shaped radial section; six identical L-shaped stator iron core columns are uniformly distributed on the periphery of the cross-shaped sheet rotor in the circumferential direction, wherein each L-shaped stator iron core column is composed of an axial stator yoke and radial stator teeth, and the stator teeth and the cross-shaped sheet rotor 1 are arranged in a radial opposite mode,and a radial air gap is formed therebetween; the outside of a disc-shaped iron core magnetic yoke is fixedly sleeved with the bottoms of the stator yokes of the six L-shaped stator iron core columns;the stator yoke of each L-shaped stator iron core column is wound with a set of torque windings and suspension force windings; a ring-shaped stator permanent magnet is coaxially and fixedly arranged on the top surfaces of the stator teeth of the six L-shaped stator core columns; and the stator permanent magnet and the rotor permanent magnet are both magnetized in the axial direction, and the magnetizing directions of the stator permanent magnet and the rotor permanent magnet are opposite. According to the bearingless permanent magnet sheet motor, the reliability and the axial rigidity of the rotor can be improved.

The invention provides a hub-type axial excitation permanent magnetic motor. The hub-type axial excitation permanent magnetic motor is formed by bearings, an axle, a hub, a stator core, a permanent magnet, armature windings, stator poles, a rotor pole and a hub cover, wherein the hub and the hub cover can rotate around the axle so as to drive a wheel to rotate; the disc type stator core is fixed at the middle part of the axle; the permanent magnet and the stator poles are successively fixed on the end surface, relative to the hub cover, of the stator core; a corresponding armature winding winds around each stator pole; and the rotor pole which is convex in the axial direction is fixed on the inner wall, facing toward the stator pole, of the hub cover. For the hub-type axial excitation permanent magnetic motor, as both the permanent magnet and the armature windings are arranged on the stator, the rotor structure is simple and works reliably; as the contact surface between the stator and the rotor is large, the conductable maximum magnetic flux is large and the motor power is high; and the integrated design of the drive motor and the hub is realized, so that a decelerator is saved and the transmission efficiency is high.

The invention discloses a flux-switching type permanent magnet motor with permanent magnet fixing bosses and belongs to the technical field of manufacture and applications of motors. The motor is formed by a stator iron core, permanent magnets, an armature winding, a rotor iron core and the permanent magnet fixing bosses; the permanent magnets are fixed on a stator and tangentially magnetize alternately; the permanent magnet fixing bosses are arranged on contact surfaces of the stator iron core and the permanent magnets and towards the permanent magnets; the permanent magnet fixing bosses and the stator iron core are connected into a whole; a groove is formed in the permanent magnet; the size of the groove is matched with that of the permanent magnet fixing bosses. According to the flux-switching type permanent magnet motor with permanent magnet fixing bosses, the installation accuracy of the permanent magnet is greatly improved due to the permanent magnet fixing bosses, falling risks of the permanent magnet along the radial direction of the motor are reduced, and the motor reliability is improved.

The invention discloses a stator structure based on a disc type permanent-magnetism motor winding. The stator structure comprises a PCB with at least 6 or 6N layers, and a Hall sensor; each PCB layeris provided with outer end portions, a winding setting part and inner end portions; each PCB layer is provided with at least three windings, and each winding is provided with two wiring ends correspondingly; the wiring ends are arranged in the outer end portions; each winding coil is printed and arranged in the corresponding outer end portion; the winding coil is uniformly printed on the winding set part along the circumferential direction, and the length of the winding coil is arranged and printed in parallel along the radial direction without overlapping; the same phase of winding coils on the PCB layers are connected via the outer and inner end portions; the Hall sensor is arranged in the outer end portions with an angle; and the layers in the PCB are connected via through holes.