265results about How to "Reduce iron consumption" patented technology

The invention discloses a double-stator magnetic field modulation permanent magnet motor comprising an inner stator, an outer stator, and a rotor. Air gaps are formed between the rotor and the inner and outer stators. The rotor is formed by magnetic conductors and non-magnetic conductors which are arranged alternately. The outer stator is formed by outer stator teeth, radial magnetizing permanent magnets, and an armature winding. The radial magnetizing permanent magnets adhere to the inner surfaces of the outer stator teeth. Adjacent permanent magnets on the same outer stator tooth have opposite magnetizing directions. The inner stator is just formed by inner stator teeth equipped with grooves along the circumferential direction and an armature winding in the grooves while not being provided with any permanent magnet. According to the double-stator magnetic field modulation permanent magnet motor, the two armature windings are used while the amount of the permanent magnets is not increased. Thus, an armature magnetic field is fully utilized and a power factor and the power density are increased. Compared with a product in the prior art, the double-stator magnetic field modulation permanent magnet motor is not provided with a rotor magnetic conductive yoke portion, decreased in rotor size and iron loss, and increased in the power density and efficiency, and can be used in power systems such as electric automobile, wind power generation or the like.

The invention discloses a short-circuit fault-tolerant vector control method for an embedded hybrid magnetic material fault-tolerant cylindrical linear motor. The short-circuit fault-tolerant vector control method comprises the following steps: building a five-phase embedded hybrid magnetic material fault-tolerant cylindrical linear motor model; compensating normal thrust missing caused by a short-circuit fault phase and suppressing a thrust ripple caused by phase short-circuit current with non-fault phase current of the motor; and obtaining expected phase voltage by adopting a series of coordinate conversion and voltage feed-forward compensation strategies, and achieving a fault-tolerant vector control after the phase short-circuit fault of the motor by a zero-sequence voltage harmonic injection-based CPWM modulation mode. According to the short-circuit fault-tolerant vector control method, the motor can suppress the thrust ripple of the motor under the condition of a phase short-circuit fault-tolerant operation; more importantly, the dynamic property, the steady-state performance and the properties in a normal state are consistent; the switching frequency of a voltage source inverter is constant; a CPU is low in overhead; and a natural coordinate system only needs to counterclockwise rotate a certain angle in any phase short-circuit fault, so that the motor fault-tolerant operation can be achieved.

The invention discloses a one-phase open-circuit fault-tolerant direct thrust control method for a five-phase permanent magnet linear motor. Firstly, a Clark transform matrix and an inverse matrix thereof are derived based on fault-tolerant phase current. On the above basis, a stator flux linkage on alpha-beta is derived, a stator virtual flux linkage is defined according to the requirements of acircular stator flux linkage trajectory, and thus the voltage compensation on alpha-beta is derived. The stator actual voltage on the alpha-beta is derived by a modulation function of a voltage sourceinverter, and voltage is combined with voltage compensation and stator current, and a stator virtual flux linkage and thrust are observed by a stator flux observer and a thrust observer. Then statorvirtual target votlage is calculated according to given thrust, a given stator flux linkage amplitude and the observed stator virtual flux linkage and thrust. Finally, the stator actual voltage is calculated by the voltage and the voltage compensation, and the motor is controlled by the voltage by the voltage source inverter. According to the method, a thrust fluctuation caused by a motor failureis suppressed, and more importantly, the dynamic performance and steady state performance are consistent with that in a normal condition.

A composite amorphous alloy axial flux motor is provided. A plurality of inner tooth portions and an outer tooth portion of the stator are uniformly distributed on the stator yoke portion in the circumferential direction, the stator core is embedded in the housing, A DC excitation win is wound around that outer tooth portion, each outer tooth portion and the inner tooth portion inside of the outertooth portion are integrally wound with an armature winding, The rotor is mounted on a rotating shaft, A permanent magnet and a first soft pole are circumferentially uniformly mounted on a side of the rotor yoke close to the stator, A permanent magnet is in contact with the first soft pole, The permanent magnet and the first soft magnetic pole correspond to the circumferential position of the inner tooth part, the second soft magnetic pole corresponds to the circumferential position of the outer tooth part, the second soft magnetic pole is separated from the permanent magnet in the circumferential direction by a magnetic isolation region, end caps are respectively provided at both ends of the housing, and the rotating shaft of the motor is supported at the center of the end caps by bearings. The permanent magnet and the first soft magnetic pole correspond to the circumferential position of the inner tooth part. The invention not only inherits the characteristics of high power density,high torque density and high efficiency of the axial flux permanent magnet motor, but also has the advantages of smooth and adjustable air gap magnetic field of the electric excitation motor and thelike.

The invention discloses an axial permanent magnet motor with a modularized amorphous alloy stator, comprising a stator and a rotor, wherein the rotor comprises a left rotor disk and a right rotor disk fixedly connected together with the left rotor disk; the stator comprises stator shafts and a stator disk arranged on the stator shafts; the left rotor disk and the right rotor disk are respectively arranged on the stator shafts arranged at two sides of the stator disk; the stator disk comprises M stator modules which are connected end to end to form a closed loop, wherein M is an integer which can be divided by 3 with no remainder; and each stator module comprises an insulating framework provided with a mounting hole in the middle, an amorphous alloy lamination arranged in the mounting hole and a coil wound on the outer surface of the insulating framework. The manufacture and the assembly of the axial permanent magnet motor can be simplified, and amorphous alloy can be conveniently applied to the manufacture of motor stators, therefore, the iron consumption of the motor is reduced, and the production efficiency, the operation efficiency and the power density of the motor are increased.

The invention discloses a radial magnetic bearing of a low-power consumption inner rotor of a permanent-magnetic up-attracting and down-repelling structure, which consists of an outer magnetic conduction ring, an outer magnetic insulation ring, a stator core, a magnet exciting coil, an inner permanent-magnetic ring, a rotor core, an inner magnetic insulation ring, an inner magnetic conduction ring, an outer permanent-magnetic half ring, an air gap and a rotating shaft. The stator core is provided with eight electromagnetic poles and four permanent-magnetic poles in the positive and negative directions of an X axis and a Y axis, the outer magnetic insulation ring is arranged between a permanent-magnetic core and an electromagnetic core on a stator, and the outer permanent-magnetic half ring is clamped in the middle of two permanent-magnetic cores in the negative direction of the Y axis of the stator through the outer magnetic conduction ring. The air gap is reserved between the stator core and the rotor core, the inner magnetic insulation ring is arranged between a permanent-magnetic core ring and an electromagnetic core ring on a rotor, the inner magnetic conduction ring is arranged between the permanent-magnetic core rings, and the inner permanent-magnetic ring is clamped in the middle of the inner magnetic conduction ring. The radial magnetic bearing of the low-power consumption inner rotor has the advantages of low power consumption, simple control, convenient manufacture and the like, and can be used as a non-contact support component of rotary equipment such as wind driven generators, electro motors, molecular pumps, high-speed bearings, machine tools and the like.

Being as drive assembly in low power consumption of actuating mechanism in use for controlling gesture of satellite and space station, the disclosed control system is composed of voltage reduced chopper, inductance type brushless DC motor of permanent magnetism in small armature, inversion bridge in three phases, digital controller, and energy consumption etc. The detected peak value of counter-electromotive force of trapezoidal wave plus a proper constant is as a reference input for the voltage reduced chopper. The input setting for the said chopper is adjusted in real time based on variety of rotation speed of motor. The invention lowers iron loss in dynamic raising speed of the DC motor and torque ripple caused by PWM effectively, as well as reduces armature reaction and electromagnetic interference, raises dynamic characteristic and operating efficiency of the flywheel drive system. The invention possesses important application value for spacecraft with limited electric energy.

The invention relates to a method for controlling electronic pole inversion of a multiphase induction motor on the basis of vector control. In the invention, the characteristic of multiple control freedom degrees of the multiphase motor is utilized and a current of each d-q plane is subjected to independent decoupling control by adopting rotor field-oriented vector control, so that the motor is controlled to operate in rotary magnetic fields with different pole pairs. Compared with the conventional pole inversion technology, the method has the advantages that the electronic pole inversion under a non-shutdown condition is realized; not only can the constant power operation range of the motor be enlarged, but also the large pole pair is adopted and the motor has good starting performance at low speed and the small pole pair is adopted at high speed; and the same speed has low current frequency relative to variable frequency speed regulation, so that the switching frequency and the ironconsumption are reduced. Moreover, in the electronic pole inversion process, the current and torque transition is smooth. The method has high reliability and is particularly suitable for high-power places.

The invention relates to a Halbach array disk rotor of a permanent magnet motor with a composite structure, relating to a motor of a permanent magnet synchronous motor, and solving the problem of magnetic coupling of motors with composite structures and the problem that the number of magnetic poles can be freely selected. The Halbach array disk rotor consists of a disk rotor core and two sets of Halbach permanent magnet arrays, the surfaces of the magnetic field weakening sides of the Halbach permanent magnet arrays are respectively fixed on the two surfaces of the disk rotor core 1, each permanent magnet in each Halbach permanent magnet array is in a fan shape, and the fan-shaped permanent magnets in each Halbach permanent magnet array are arranged around the shaft axis of the disk rotor core in a radial form. Whether the numbers of the poles of the two Halbach permanent magnet arrays are the same or not, magnetic flux poles in the rotor core are extremely less, the rotor core is rather unsaturated, magnet-circuits of the two motors can not be coupled, the two rotors can be controlled independently, the integral hybrid system can run more harmoniously, and each of the rotor can flexibly select the number of the magnetic poles according to power level and basic rate that are actually needed.

The invention discloses non-oriented electrical steel for an ultrahigh-effect constant-frequency compressor and a preparation method of the non-oriented electrical steel. The non-oriented electrical steel for the ultrahigh-effect constant-frequency compressor comprises the following chemical components of, in percentage by weight, 1.0%-1.90% of Si, 0.20%-0.9% of Als, 0.10%-0.60% of Mn, 0.01%-0.02% of P, less than or equal to 0.01% of C, less than or equal to 0.02% of S, less than or equal to 0.02% of N, less than or equal to 0.01% of Ti, less than or equal to 100 ppm of C+S+N+Ti, and the balance Fe and inevitable impurity elements. According to the reasonable component design, the technological technologies such as hot rolling, normalizing, cold rolling, continuous annealing and the like are matched to optimize, so that the non-oriented electrical steel for the ultrahigh-effect constant-frequency compressor is obtained, which the thickness of 0.5mm, P1.0/50 is less than or equal to 3.20W/kg, B5000 is greater than or equal to 1.72T, the yield strength Rp0.2 is less than or equal to 350 MPa, and the transverse longitudinal strength difference delta Rp0.2 is less than or equal to 10 MPa.

The invention provides an efficient reluctance type multi-functional motor with axial and radial three-dimensional mixed magnetic circuits in axial split phases. In the motor, the axial split phases are adopted, and each phase is provided with the axial and radial three-dimensional mixed magnetic circuits. The motor comprises rotors and stators, wherein the rotors and the stators are provided with n salient poles, and n is a positive integer which is more than 5; the stator of each phase is of an independent stator disk structure with the n salient poles and is provided with an exciting winding; the rotor of each phase is formed by the left and right rotor disks with the n salient poles and a cylinder with the n salient poles in the middle; two ends of the cylinder are fixedly connected with the left and right rotor disks, and salient pole angular elongations between the rotor disks and each pole of the cylinder are respectively aligned at groove angular elongations in an axial direction; and the rotor and the stator of each phase are connected in series in an axial direction. The use ratio of the magnetic circuit is improved to greatly strengthen unit volume effect of the motor; and the motor has the advantages of small torque pulsation, low cost and the like.

The invention discloses a double-permanent-magnet lateral magnetic flux linear permanent magnet motor, and the motor comprises a primary mechanism and a secondary mechanism. The primary mechanism comprises a plurality of primary units in the same structure, and each primary unit comprises a magnetic conduction part and an armature winding. The magnetic conduction part is provided with three projection parts: a main magnetic tooth and auxiliary magnetic teeth located at two sides of the main magnetic tooth. The armature winding is wound around the periphery of the main magnetic tooth. The secondary mechanism comprises a permanent magnet fixing plate and a permanent magnet matrix, wherein the permanent magnet matrix comprises a plurality of permanent magnets which are arranged in parallel. The two rows of permanent magnets are sequentially fixed at two sides of the permanent magnet fixing plate in a one-one corresponding manner. There are gaps between the magnetic conduction part and the permanent magnets. The motor can achieve a purpose that one iron core lamination is corresponding to two parallel magnetic flux loops of one armature winding, is simple in structure, is short in each magnetic loop, is higher in force density, and is smaller in output force fluctuation. The shorter magnetic loop can reduce the eddy-current loss of the motor, improves the efficiency of the motor, and improves the utilization rate of the permanent magnets.

An embodiment of the invention provides a permanent magnet motor cooling system for a railway vehicle. The system comprises a permanent magnet motor and a cooling device, wherein the permanent magnetmotor comprises a motor body; the motor body comprises a rotor rotating shaft, a rotor, a stator winding, a stator and a shell; the cooling device comprises an outer air channel cooling fan, an outerwind path heat dissipation part, an inner air channel cooling fan and an inner wind path heat dissipation part; the inner air channel cooling fan is arranged at one end of the rotor rotating shaft inthe motor body; a heat conduction strip is arranged on the outer side wall of the stator; the inner wind path heat dissipation part is arranged on the outer side of the heat conduction strip in a sleeved mode; an inner wind path gap is formed between the inner wind path heat dissipation part and the outer side wall of the heat conduction strip; a stator rotor gap exists between the inner side wallof the stator and the rotor; the inner wind path gap is in clearance connection with the stator rotor to form an inner wind path; the outer air channel cooling fan is arranged on the rotor rotating shaft and is arranged outside the motor body; and the outer wind path heat dissipation part is arranged on the outer side of the shell. According to the embodiment, the permanent magnet motor for the railway vehicle can be effectively cooled.

The invention belongs to the field of motors, and relates to a U-shaped stator permanent magnet switched reluctance motor. The U-shaped stator permanent magnet switched reluctance motor includes a rotor and a plurality of U-shaped stator blocks arranged on the circumference of the rotor, outer sides of rotor teeth of the rotor are outer arcs, inner sides of stator teeth of the U-shaped stator blocks are inner arcs, and air gaps are arranged between the outer arcs of the rotor teeth and the inner arcs of the stator teeth; the plurality of U-shaped stator blocks form a modular stator, a permanent magnet is arranged on an inner side wall of each U-shaped stator block, and superposition of like polarities occur in polarities of the permanent magnets and electromagnetic polarities generated by U-shaped stator block exciting windings. When the phase number of the motor is N, the number ratio of the stator teeth to the rotor teeth of the motor is 2N to (2N-1), for example, when the phase number of the motor is three, the motor is of a three-phase 6/5 structure or a three-phase 12/10 structure. The stator of the motor is the modular stator, modular production is facilitated, interphase magnetic paths are not coupled and completely isolated, and meanwhile, the motor has the advantages of high output, simple structure, easy maintenance, high fault-tolerance performance, convenient control and high reliability.

Disclosed is a novel static sealed high-temperature superconductive excitation magnetic flux switching motor. The novel static sealed high-temperature superconductive excitation magnetic flux switching motor comprises a stator and rotors from outside to inside, wherein the inner side of the stator is uniformly and alternately wound with stator teeth and stator non-ferromagnetic supporting parts in the circumferential direction; the stator teeth and the stator non-ferromagnetic supporting parts are radially arranged in pairs; the stator teeth are wound with armature windings; the stator non-ferromagnetic supporting parts are wound with high-temperature superconductive excitation windings; and the rotors are separated through rotor non-ferromagnetic supporting parts to form segmented rotor iron cores which are uniformly and alternately wound in the circumferential direction. According to the novel static sealed high-temperature superconductive excitation magnetic flux switching motor, the non-ferromagnetic material is adopted to fix the high-temperature superconductive excitation windings, so that the area of armature winding slots is enlarged, the electric load of the motor is increased, and the motor power density is improved; meanwhile, the rotor side also adopts the non-ferromagnetic material to support the segmented rotor structure, so that a large amount of ferromagnetic material is saved, and the weight of the motor is lowered; and in addition, the dosage of the ferromagnetic material is reduced, so that the iron consumption of the motor is greatly lowered and the motor efficiency is effectively improved.