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.

The invention converts built-in type rotor structure in conventional 'I'type to built-in type rotor structure in 'V'type, as well as sets up reinforced ribs between magnetic poles and sets up accessory pores above the said reinforced ribs. Changing distribution of deformation on surface of rotor diameter, the rotor structure in 'V'type makes maximal centrifugal stress point shift to reinforced ribs of rotor. The maximal centrifugal stress point is tensile stress restricted by tensile strength of material of rotor core. Since tensile strength of material of rotor core is larger than yield strength, thus, operating mechanical property of rotor at high speed is enhanced remarkably. Moreover, the said accessory pores can control waveform of air gap field, lightens weight of rotor, reduces centrifugal force, vibration and noise as well as improves operating mechanical property and other performances of motor.

An U-shaped stator hybrid-excitation switch reluctance machine belongs to the field of an electrical machine. The U-shaped stator hybrid-excitation switch reluctance machine comprises a rotor and a plurality of U-shaped stator blocks arranged at the circumference of the rotor, the outer side of rotor teeth of the rotor is shaped as outer arc, the inner side of stator teeth of the U-shaped stator blocks is shaped as inner arc, a gap is arranged between the outer arc of the rotor teeth and the inner arc of the stator teeth, the plurality of U-shaped stator blocks form a modular stator, excitation windings are wound around the two stator teeth of each U-shaped stator block, a permanent magnet is arranged at the inner side of each U-shaped stator block, and the magnetizing direction of the permanent magnet is magnetized tangentially. When the phase number of the electrical machine is m phases, the number rate of the stator teeth to the rotor teeth of the electrical machine is 2m to (2m-1), for example, when the phase number of the electrical machine is three phases, the electrical machine is structurized with three phase 6 / 5 and three phase 12 / 10. In the U-shaped stator hybrid-excitation switch reluctance machine, the stator is the modular stator, modular production is promoted, interphase magnetic paths are not coupled and completely separated, and meanwhile, the electrical machine has the advantages of high output, simplicity in structure, high fault-tolerance capability and high reliability, is easy to maintain, and is convenient to control.

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 permanent-magnet axial-magnetic-field brushless motor, which comprises a stator, a rotor, a lower end cap and an upper end cap, wherein the rotor is arranged at the center of the stator. The permanent-magnet axial-magnetic-field brushless motor is characterized in that the stator comprises a plurality of stator C-shaped iron cores and winding coils arranged on the iron cores; the rotor comprises a non-magnet-conductive rotor plate, a plurality of permanent magnets and a rotary shaft, the rotary shaft is arranged at the center of the non-magnet-conductive rotor plate, the permanent magnets are uniformly embedded on the circumference of the non-magnet-conductive rotor plate, the stator C-shaped iron cores are embedded in slots of the upper end cap and the lower end cap and circularly distributed on the circumference of the non-magnet-conductive rotor plate uniformly, and upper magnetic pole surfaces of the stator C-shaped iron cores correspond to the permanent magnets of the non-magnet-conductive rotor plate. The invention further discloses an assembling method of the motor. The permanent-magnet axial-magnetic-field brushless motor and the assembling method thereof have the advantages that electric load and magnetic load are set independently, the stator lamination iron cores are simple in manufacture, and coil magnetic loops formed by the stator windings are independent to each other. Besides, design difficulty of the motor is beneficially reduced, and manufacturing cost of the motor is reduced while performance of the motor is improved.

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.

The invention discloses a stator and rotor combined structure and belongs to the motor field. The stator and rotor combined structure includes a stator and a rotor; the stator includes a stator core; the stator core is provided with wire winding teeth opposite to the rotor; the wire winding teeth are uniformly distributed on the stator core; the wire winding teeth are wound with an armature winding; the rotor includes a rotor core and a plurality of magnets; a plurality of mounting grooves are uniformly distributed at intervals along the circumferential direction of the rotor core; one magnet is embedded in a corresponding mounting groove; the plurality of magnets include first magnets and second magnets, wherein the first magnets are adjacent to the second magnets; the axis of symmetry of the first magnet, which passes through the center of the rotor is a D axis; an axis of symmetry between the first magnet and the second magnet, which passes through the center of the rotor is a Q axis; the distance from points on the outer contour line of an end surface of the rotor to the side walls of the wire winding teeth is g; and in a sector scope from the Q axis to the D axis, g is decreased from the Q axis to the D axis.

The invention discloses an embedded type mixing magnetic material fault-tolerant cylindrical linear motor which comprises primary bodies and secondary bodies. The length of each primary body is smaller than that of each secondary body. An air gap is reserved between each primary body and the corresponding secondary body. Each primary body comprises armature teeth, fault-tolerant teeth and a coil winding. The 2*m armature teeth and the 2*m fault-tolerant teeth are uniformly distributed on each primary body, wherein m is the phase number of the motor and is larger than or equal to three; the armature teeth and the fault-tolerant teeth are arranged at intervals in a staggered mode. Only one set of disc-shaped coil windings are placed into an armature tooth groove of each primary body. No windings are arranged on the fault-tolerant teeth. The secondary bodies of the motor are made of mixing magnetic materials, a part of ferrite is used for replacing a part of rare earth permanent magnets to form four different mixing magnetic material structures, on one hand, the quantity of the adopted rare earth permanent magnets is greatly reduced, and the cost of the motor is reduced; on the other hand, as the magnetic energy product of the permanent magnets is reduced, the eddy-current loss of the motor is reduced greatly, and efficiency of the motor is improved.

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 low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure comprising a stator and a rotor. The stator employs pear-shaped flat-bottomed grooves. Irregular grooves are disposed on a position, corresponding to the center of a stator tooth portion, on the outer circumference of the stator. A rotor outer circumference is formed by a plurality of four-segment arcs. The rotor is provided with a plurality of grooves in which permanent magnets are embedded. The grooves are flat-bottomed V-shaped grooves. The tops of the left groove and the right groove of each V-shaped groove are provided wedge-shaped grooves for preventing the permanent magnets from moving. The permanent magnets are embedded in the left groove and the right groove. Reinforcing ribs are arranged between the tops of adjacent flat-bottomed V-shaped grooves. Compared with a conventional motor with a built-in V-shaped permanent magnet, the low-torque-ripple high-efficient permanent magnetic motor stator and rotor structure is decreased in permanent magnet magnetic leakage, increased in the utilization rate of the permanent magnets, and provided with a salient pole effect, fully utilizes reluctance torque, improves motor efficiency and power density, improves gap flux density waveform, reduces cogging torque and torque ripple, and effectively reduces core loss and eddy-current loss.

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 provides a brushless double-rotor motor by using a Halbach permanent magnet array and a magnetic field modulation principle. The double-rotor motor comprises four layers which are an inner stator, a modulation ring rotor, an intermediate rotor and an outer stator in sequence from inside to outside in all; the inner stator, the modulation ring rotor and the intermediate rotor form an inner magnetic field modulation-type motor; the intermediate rotor and the outer stator form an outer permanent magnet synchronous motor; and the inner side and the outer side of the intermediate rotor are provided with Halbach array permanent magnets respectively. The modulation ring rotor is connected with an output shaft of an internal combustion engine; and the intermediate rotor is connected with the output shaft of the double-rotor motor. According to the double-rotor motor, the internal and external magnetic field coupling phenomenon of the double-rotor motor is reduced or even eliminated through the magnetic self-shielding characteristic of the Halbach array, the brushless target of the of an inner rotor of the double-rotor motor is achieved through a magnetic field modulation principle to improve the reliability of the motor, and the disadvantages caused by internal and external magnetic field coupling and a carbon brush slip ring are avoided.

The invention discloses a magnetic slot wedge and a production method thereof. The magnetic slot wedge comprises 18 percent to 20 percent of 943 unsaturated polyester resins, 0.5 percent to 1 percent of an internal releasing agent, 0.2 percent to 0.5 percent of tert-butyl peroxy benzoate, 0.1 percent to 0.3 percent of benzoyl peroxide, 54 percent to 57 percent of magneto-increasing material and 24 percent to 25 percent of alkali free glass fiber. The production method comprises the steps that: 1. the unsaturated polyester resins, the internal releasing agent and a peroxide evocating agent are prepared into an adhesive according to proportion; 2. a mould is heated to be 150 DEGC -200 DEG C and extraction speed is 0.8-1.40r / min; 3. the alkali free glass fiber soaking the adhesive is treated with pultrusion by the mould; 4. cooling and cutting are carried out; 5. the cut slot wedge is treated with head grinding; 6. the surface of the slot wedge is treated with paint treatment to become bright and clean with no burr; and 7. airing, detecting and packaging are carried out. The magnetic slot wedge has high magnetoconductivity, high cleavage strength, great bending strength and simple production method.

The invention discloses a one-phase short-circuit fault-tolerant direct torque control method for a five-phase permanent magnet motor. The one-phase short-circuit fault-tolerant direct torque controlmethod comprises the steps of: when an open-circuit fault of an A phase occurs, deducing a healthy-phase open-circuit fault-tolerant current, a fault-tolerant transformation matrix T4 / 2 and an inversematrix thereof T2 / 4 according to constraint conditions that a stator flux linkage vector is unchanged before and after the fault, a sum of healthy-phase currents is zero and the copper consumption isminimum; when a short-circuit fault of the A phase occurs, deducing a residual healthy-phase compensation flux linkage according to the principles that the stator flux linkage vector is unchanged before and after the fault and the copper consumption is minimum, or according to the constraint conditions that the healthy-phase compensation current amplitudes are equal and a sum of healthy-phase compensation currents is zero; and acquiring a stator phase voltage command through combining a stator flux linkage with a torque observer, setting torque and stator flux linkage amplitude and carrying out coordinate transformation, and combining the voltage with a pulse width modulation technology based on zero-sequence voltage injection to achieve consistent steady-state performance and dynamic performance before and after the motor short-circuit fault. The one-phase short-circuit fault-tolerant direct torque control method has the advantages of constant switching frequency of an inverter and small CPU overhead.

The invention discloses a mixed excitation servo motor. The mixed excitation servo motor comprises a stator iron core, a rotor iron core, excitation windings, armature windings, a permanent magnet and a shaft, belonging to the special motor technology field. The rotor iron core is fixed on the shaft; ten convex rotor poles are uniformly distributed on the rotor iron core; the stator iron core has twelve convex stator poles; the twelve stator poles consists of six pairs of parallel stator poles; an armature groove is arranged between the two stator poles in each pair of parallel stator poles; an excitation groove is formed between two adjacent pairs of parallel stator poles; an excitation winding is wound on each pair of parallel stator poles; the winding directions of adjacent excitation windings are reverse; the excitation winding is arranged on the bottom of the excitation groove; a concentrated armature winding is wound on each stator pole; the armature winding is arranged at the notches of the excitation groove and the armature groove; tangential magnetizing permanent magnets are embedded in the yoke parts of the two stator poles in each pair of parallel stator poles; and the magnetizing direction of the adjacent permanent magnets are opposite. The mixed excitation servo motor has advantages of the mixed excitation motor; the excitation windings are isolated from the armature windings; the rotor has no permanent magnet and no excitation winding, so that the mutual-interference does not exist and the reliability is high.

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 a yoke-free closed slot type multi-plate permanent magnet motor comprising a motor housing, a plurality of rotors, and a plurality of stators. The motor housing consists of a rotating shaft, a bearing, a front end cover, a rear end cover and a casing; the plurality of rotors are fixed with the rotating shaft; and the stators are arranged among the adjacent rotors. Each stator has a yoke-free closed slot structure formed by two stator outer teeth, a stator inner tooth between the two stator outer teeth, a stator inner plug, a stator outer plug, and a winding. Each rotor with a combined oblique pole structure includes a plurality of rotor plates that are distributed coaxially at intervals along the axial direction and fan-shaped permanent magnets contacted to the rotor plates. According to the invention, the provided yoke-free closed slot type multi-plate permanent magnet motor has advantages of improved slot full rate, iron core material saving, torque quality improvement, torque density enhancement, and improvement of whole operation efficiencies of the low speed and light load.

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 method for handling organic wastewater based on Fenton reaction, comprising the following steps of: (1) high-voltage pulse electric coagulating reaction: regulating the pH value of wastewater to be 3-4 so that wastewater performs high-voltage pulse electric coagulating reaction in a high-voltage pulse electric coagulating device at the current intensity of 1-30A, wherein the electric coagulating reaction time ranges from 30-120min, the high-voltage pulse electric coagulating device is input by the 100-400V alternating current which is then converted into direct current after rectification, the pulse voltage of 80V to 350V is formed by utilizing a pulse generator, the anode and cathode plates adopted by the high-voltage pulse electric coagulating device are iron plates with the carbon content above 0.45wt% and the space between the polar plates ranges from 10-30mm; (2) Fenton reaction; and (3) concrete precipitation reaction. Compared with the prior art, the invention reduces the handling cost, shortens the handling time and ensures better handling effect.

The invention provides an electric automobile modular stator and rotor motor, and belongs to the technical field of automobile motors. The electric automobile modular stator and rotor motor is characterized by comprising a convex lens-shaped iron core, a non-magnetic-conduction rotor iron core, a stator iron core, an excitation winding, an armature winding and the like, wherein the stator iron core is divided into six stator modules which are E-shaped; three unequal-width stator poles are arranged on the inner side of each stator module, wherein an excitation pole is arranged in the middle, and armature poles of the same width are arranged on the two sides; the non-magnetic-conduction rotor iron core has 10 fan-shaped grooves; and fan-shaped iron cores formed by silicon steel sheets in a laminated mode are embedded in the fan-shaped grooves. By virtue of the technology of the invention, a magnetic field can be provided for two armature windings through a short-moment excitation winding, so that the winding groove fullness and the isolation performance of each phase are improved, and the design of modularization of the stator and the rotor is realized.

The invention discloses an energy-saving permanent magnetism switched reluctance motor, belonging to the field of motors. The motor comprises a rotor and a plurality of H-shaped stator blocks arranged on the circumference of the rotor, wherein the outer side of each rotor tooth of the rotor is an outer arc, the inner side of each stator tooth of the H-shaped stator blocks is an inner arc, and a gap is formed between the outer arc of the rotor tooth and the inner arc of the stator tooth; the plurality of H-shaped stator blocks form a modularized stator, a permanent magnet is arranged on the inner wall of each H-shaped stator block, and the polarity of the permanent magnets is in homo-polar superposition with the electromagnetic polarity produced by H-shaped stator block exciting windings. When the number of phases of the motor is N, the number ratio of the stator teeth to the rotor teeth of the motor is 2N: (2N-1), for example, when the number of phases of the motor is 3, the motor is a three-phase 6 / 5 structure or a three-phase 12 / 10 structure. The stator of the motor is a modularized stator, so that modularized production can be realized, inter-phase magnetic circuits are not coupled and are completely isolated, meanwhile, the motor is high in power, simple in structure, easy to maintain, strong in fault tolerance, convenient to control and high in reliability.

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.

The invention discloses a winding-dynamically-changeable speed-adjustable permanent magnet synchronous motor and a control method thereof. Winding connection modes are changed through switches connected with windings, so that a counter electromotive force can be decreased. According to three-phase / double-three-phase conversion, the windings of a double-three-phase motor are connected in series when the motor is at a low speed, so that one three-phase winding is formed; when the motor is at a high speed, two sets of windings of the motor are respectively connected with two inverters. By means of three-phase / double-three-phase conversion, the motor can be set to be two rated points; during three-phase connection, the rated points can be low-speed rated points; when the rotating speed of an ordinary speed-adjustable motor increases gradually, weak magnetic current gradually increases, and as a result, the performance of the motor is reduced; and when the rotating speed of the motor provided by the invention exceeds 2 times of the rotating speed of the low-speed rated points, double three-phase connection is adopted, and a counter electromotive force is reduced to 1 / 2 of an original counter electromotive force, and therefore, weak magnetic current can be effectively reduced, and the efficiency of the motor can be improved, and the operating range of the motor can be extended.

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.