75 results about "Winding factor" patented technology

Embodiments include apparatus and methods for determining link level wind factors and providing routes for drones based on the wind factors. At least a portion of the route corresponds to airspace above a road network. Wind factor values are assigned to a range of altitudes of drone air space above a road link of the road network based on a wind model and stored in a database. The wind model is applied to a location based on wind condition data and three-dimensional (3D) features from 3D map data associated with the location. The route is optimized based on the determined wind factors.

The invention discloses the blocking stator structure low speed direct current brushless motor. It divides evenly the inner diameter circle of the stator iron core into the K1 fan section group, the A, B, C three phases of each fan section group accounts for the same superficial one fan section respectively, the stator iron core of each fan section are mounted with K2 canine tooth, the tooth distance between the border canine tooth is one polar distance, the stator iron core between the said border two fan sections are mounted with one the small slot respectively, one small tooth is mounted between the said two small slots, the settling distance collecting loop are coiled on each canine tooth, the poles of the electric machine of the invention can be designed largely, the ends of the electric machine stator winding don't fold each other, the ends are shorter, the winding modulus is one, the process of the coiling is easy, and the stator iron core of the electric machine can depress the permanent magnet guiding humorous wave torque availably without the flume, the efficiency of the electric machine is high.

The invention discloses a winding-type linear brushless doubly-fed generator, and proposes a unit motor according to a unit motor concept, wherein the total number of pole-pairs of a stator power winding and a control winding of the unit motor is N times. Meanwhile, a rotor winding employs a mode of symmetric distribution like a sine rule according to the principle of tooth harmonic, thereby reducing coils of different phases of a power winding P1 and a control winding P2. The rotor winding can achieve the coupling of a control winding and another winding well, and the air-gap magnetic density harmonic is lower. The generator can enable a magnetic field with a lower moving speed to be modulated into a high-speed magnetic field, and effectively improves the power density. The control winding is placed at a stator side, and a sliding ring and a brush are removed. The generator is low in motor failure rate, is long in service life, eliminates the higher harmonic of a magnetomotive force of a rotor to the maximum degree through the adjustment of the span and turns of a rotor coil, achieves the higher winding coefficients of the pole pairs of power windings P1 and P2, and achieves the high efficiency and energy saving.

The invention provides a method for drawing a wind-rose chart based on the ExtJx. The method comprises the steps that original wind factor data of different modes are processed in a unified mode and stored in a database through a data enhancing preprocessing engine process; data analysis and assembly are conducted on wind-rose chart data obtained from the database by a wind-rose chart data service providing process according to a timing condition and wind-rose statistical data are provided for a front platform; different display modes of the wind-rose chart are configured by a rose chart drawing assembly 'Wind Rose Chart', the display modes are configured to a Panel assembly of the ExtJs and are bound with a data set of the wind-rose chart; after an ExtJs event mechanism asynchronously judges that the data arrive, the rose chart is updated. The method is convenient to deploy and capable of rapidly and accurately conducting rendering at the front end and updating the wind-rose chart in time and providing full support for development of the rose chart at the front end of a Web information system, and can be conveniently and rapidly connected to the Web information system needing rose chart drawing.

The invention discloses a method for researching the influence of a micro-landform strong wind area on the safety operation of an electric transmission line. The method for researching the influence of the micro-landform strong wind area on the safety operation of the electric transmission line comprises the steps that (1) a stepwise regression equation a1 is established based on a strong wind factor set a1 and a landform factor set a1; (2) the landform factor set a1 is substituted into the stepwise regression equation a1, so that a simulation strong wind factor set a1 is obtained; (3) based on the linear relationship between the simulation strong wind factor set a1 and a strong wind factor set a2, a unary linear regression equation a2 is established; (4) a landform factor set b1 is substituted into the unary linear regression a2 so that a simulation strong wind factor set b1 is obtained; (5) according to the difference value set between the simulation strong wind factor set b1 and a strong wind factor set b2, a strong wind factor set b3 is obtained; (6) based on the strong wind factor set b3 and a landform factor set b2, a stepwise regression equation b2 is established; (7) a modeling result is obtained, wherein the stepwise regression equation b2 and the unary linear regression equation a2 are back substituted into the stepwise regression equation a1, and then the final modeling result is obtained.

The invention relates to a method for changing a double-layer lap-winding winding to Y-delt connection mixed winding. The method is characterized in that the method comprises the steps of calculating the section areas of a Y-connection winding conductor and a delt-connection winging conductor, and determining the number of branches connected with each other in parallel, the number of turns of the coil and the width and the thickness of a wire on the basis of the prior double-layer lap-winding windings. In consideration of the manufacture cost of the motor, other parameters and the size of the motor are kept original values when changing to the Y-delt connection mixed winding, but the size of a stator groove needs to be adjusted correspondingly according to the wire gauge and the number of turns of the coil without changing the groove area. The winding has improved winding coefficient and can weaken harmonic waves with higher harmonic contents such as the fifth and the seventh harmonic waves, thereby increasing the wire gauge, reducing the number of turns, lowering the motor loss, and improving the motor efficiency and the power coefficient. Additionally, the Y-connection and delt-connection coils are arranged in a non-alternate manner so as to reduce the process difficulty. The method suits the alteration of common double-layer lap-winding winding of high-voltage large and medium asynchronous motor with a power lower than 2,000 kW.

The invention relates to a single/double-layer stator winding for a 24-slot 2-pole three-phase alternating current motor. The single/double-layer stator winding is evolved from a three-phase dual-layer short-distance distribution lap winding in which equal spans among 24-slot 2-pole coils are 10 slots; four coils are arranged in each phase of positive and negative phase belts; in each phase of positive and negative phase belts, upper and lower coil edges of coils in adjacent two slots belong to the phase; the upper coil edge of the coil in a small-number slot in the adjacent two slots is moved into a large-number slot, and the end part length is reduced; the lower coil edge of the coil in the large-number slot is moved into the small-number slot, and the end part length is reduced; the spans among the four coils of which the coil edges are moved in each phase are 9 slots; and the coils of which the four coil edges are moved and the four coils of which the coil edges are not moved construct four groups of coil groups consisting of two inner concentric-like coils and two outer concentric-like coils. Under the situation of not changing an electrodynamic force winding coefficient or a magnetomotive force winding efficient, an end-part copper wire is short; the loss is low; and the efficiency is high. When the total number of turns is constant, the number of turns of the coils which are 10 slots in spans is properly larger than the number of turns of the coils which are 9 slots in spans, and the motor performance can be further improved.

The invention discloses an alternating current brushless double-fed motor and a design method for a tooth harmonic coil-wound rotor distributed winding therefor. The design method comprises the steps that the number Zr of rotor toothed slots and the phase number mr are preliminarily determined according to stator winding pole pair numbers p1 and p2, wherein Zr is equal to mr at the current moment; each tooth is corresponding to a concentrated coil, so that a tooth harmonic concentrated type winding is obtained; then the number of rotor slots is increased, a coefficient kr is chosen to enable a new number of rotor slots Z to be equal to krZr, wherein the polar distance at the current moment tau r is equal to kr; on the basis, one concentrated coil in each phase is split into nr coils with the equipment pitch of yr, wherein nr is less than or equal to kr, and yr is less than tau r; the nr coils are distributed in the rotor slots in sequence at interval of alpha r slot pitch angle; then the kr, nr and yr are adjusted to enable the winding coefficient of the pole pair numbers p1 and p2 to be as high as possible, and the harmonic content is low; and finally, the winding coils in each phase are wound by adopting a multi-plane concentric type winding method to obtain coils with different pitches and different sizes and with overlaid central lines, and then the obtained coils are put in the rotor slots, connected in series and then linked in a short-circuited manner to obtain the distributed tooth harmonic rotor winding. The distributed tooth harmonic rotor winding has the characteristics of low harmonic content, high conductor utilization ratio and tidy winding end part arrangement.

The invention relates to a fractional slot single and double-layer lap winding structure of a servo permanent magnet synchronous motor, which is characterized in that a stator slot comprises 30 slots, 8 poles and 3 phases, wherein the number of slots of per pole per phase is 5/4; the stator winding is designed into a single and double-layer lap winding; each phase comprises 8 coils, the pitch of each coil is 4, wherein the number of turns of each of 4 coils is n; the number of turns of the rest 4 coils is 2n; the ratio of numbers of turns of the two types of coils is 1:2; all opening coils of the 8 coils are connected in series, and the 3 phases are symmetrically distributed to form the single and double layer lap winding; 10 slots of the 30 slots are single lap windings, the rest 20 slots are double-layer lap windings, the 30 slots of a stator punching corresponding to the stator slots are composed of two types of slots, wherein the number of larger slots is 12 and the number of small slots is 18. Compared with the traditional lap winding, the fundamental wave winding coefficient of the special fractional slot single and double layer lap winding is improved by 0.75%, while the magnetic potential harmonic wave is reduced by 60.3%; and the inserting winding process for coil manufacturing is totally the same as that of the traditional lap winding, thereby reducing the vibration, noise and temperature rising of a motor traditionally designed and improving the efficiency and the torque.

The invention discloses a 18N-10N structure low-noise fractional slot concentrated winding permanent magnet motor. 18N stator teeth are uniformly distributed on a stator; a rotor has 10N poles, the stator teeth are wound with concentrated winding wire packages, and each three adjacent concentrated winding wire packages form one phase so as to form 2N groups of three-phase winding systems. In a fixed three-phase winding, in three adjacent concentrated winding wire packages of one phase, the middle one is A1, and two concentrated winding wire packages at both sides are reversely connected in series to form A2; and the other two phases are also defined to respectively obtain B1, B2, C1 and C2; after A2, B2 and C2 are connected into a triangle shape, a connection point of A2 and B2 is connected into C1, a connection point of B2 and C2 is connected into A1, and a connection point of C2 and A2 is connected into B1. According to the invention, not only is a winding factor guaranteed not to bechanged, but also content of tooth harmonic waves in a winding magnetomotive force in an air gap is reduced, so that vibration and noise of the motor and eddy current loss are reduced; and moreover,a reluctance torque under a magnetic field saturated working condition is improved.

The invention discloses a double-layer long-short-distance hybrid winding suitable for a 36-slot 14-pole three-phase permanent magnet synchronous motor, wherein each phase winding has 12 coils, wherein 8 coils are short-distance coils with span of 2 slots and 4 coils are long-distance coils with span of 3 slots; Each phase winding branch is composed of four short-range coils with span of 2 slots and two long-range coils with span of 3 slots, which are connected in series according to the principle of maximum composite fundamental electromotive force. All the coil edges belonging to the same phase winding are located in the stator slot at the same position as all the coil edges in the stator slot of a 36-slot 14-pole three-phase permanent magnet synchronous motor with 3-slot long-distance coil double-layer winding, Only the order of connection between all the coil sides belonging to the same phase winding is changed, and the fundamental winding coefficient is 0.9236. Compared with the two-layer distributed winding with two-slot short-distance coil, the coefficient of fundamental winding is 0.8985, the copper is saved, and the comprehensive performance index of motor is high.

The invention relates to a permanent magnet synchronous motor with a magnetism concentration effect, which comprises a stator and a rotor, wherein the stator includes a spliced stator core and a stator winding, the spliced stator core is an annular body composed of a plurality of sub-cores uniformly distributed around the rotor, two adjacent sub-cores are provided with a stator gap therebetween, each sub-core is provided with two wire slots at the side opposite to the rotor, the part between the two wire slots of the same sub-core form a winding tooth, the top of the winding tooth and the topof the non-winding tooth are the same in width, and the tooth width of the non-winding tooth is equal to the sum of the tooth width of the winding tooth and the width of the stator gap. The permanentmagnet synchronous motor adopts the spliced stator core, thereby not only simplifying the motor structure, reducing the transportation, installation and maintenance difficulty, but also being capableof avoiding a short circuit between phases and improving the fault-tolerant ability of the motor. The spliced stator core also improves the winding factor and generates a magnetism concentration effect, thereby improving the torque density and operation efficiency of the motor.

The invention discloses a method and system for determining the train running safety threshold value under coupling of wind, vehicle, road, network, wall and terrain, and therefore the problem that due to the fact that at present, a train overturning coefficient serves as the only criterion for judging wind area driving safety, various influence factors in the actual environment can not be comprehensively considered. The method includes the steps of firstly, determining a first relational expression between the wind speed and a vehicle speed under the state that the road condition, the vehicle type and load, the wind speed and direction and the vehicle speed are coupled, a second relational expression between the critical wind speed and a vehicle speed under the train liter weight ratio critical state, and a third relational expression between the critical wind speed and a vehicle speed under the state that a bow network loses efficacy due to wind-induced network deviation; secondly, obtaining and comparing three vehicle speeds according to the current wind speed during train running and according to the three relational expressions, wherein the minimum vehicle speed is the train running safety threshold value under the environment where a current wind factor, a current vehicle factor, a current road factor, a current network factor, a current wall factor, a current terrain factor and the like are coupled. In this way, the train running safety threshold value determined through the method is closer to the actual environment of train running, and higher reference value is provided for selection of the train running speed.

The invention discloses a multifunctional integrated wind factor verification device. The device comprises an outer frame, a down-blowing wind tunnel and a control system, wherein the down-blowing wind tunnel and the control system are mounted in the outer frame; the outer frame is provided with a bracket and an outer wall plate mounted on the bracket, one end of the outer frame is provided with an air inlet, and the other end of the outer frame is provided with a transparent standing chamber. By blowing a power section into the down-blowing wind tunnel, compared with an air suction mode, thedevice has the advantages that reduction of the occupied area of wind tunnel equipment is facilitated and has no special requirement for the field, and the manufacturing cost is reduced. A frequency converter of the control system is connected with the power section to better control the power section, and therefore the stable airflow flowing demands are met.

The invention discloses a method for confirming an equivalent-groove fullness rate three-phase double-layer stacking sine winding. The method comprises the following steps: confirming a stator groove number Z and a pole number 2p of a three-phase motor; according to the stator groove number Z and the pole number 2p, confirming the pitch of a coil; according to the stator groove number Z, the pole number 2p and the pitch of the coil, acquiring a primary turns ratio; according to rules and an equivalent-groove fullness rate, acquiring equivalent-groove limiting conditions; confirming turns numbers Q of each pole, each phase and each group of coils; confirming all turns numbers W1, W2, W3 to Wi of N groups of coils which meet the turns numbers Q of coils of pole phase groups, the primary turns ratio and the equivalent-groove limiting conditions; respectively processing the turns numbers W1, W2, W3 to Wi of N groups of the coils so as to obtain comprehensive harmonic wave intensity and base wave winding coefficients corresponding to each group; judging the comprehensive harmonic wave intensity and the base wave winding coefficients corresponding to each one of N groups, and selecting optimal coil turns numbers W1, W2, W3 to Wi. The method is high in base wave winding coefficient, the winding utilization rate is increased, and most harmonic waves can be weakened.

The invention provides a single-phase capacitor-operated motor, comprising a motor shaft, a rotor, a stator, a front end cover and a rear end cover; wherein, the rotor is sheathed on the motor shaft and the stator is sheathed at the outer side of the rotor; mutually snap-fit front end cover and rear end cover are arranged at the outer side of the stator; the two ends of the motor shaft are installed on the front end cover and rear end cover via bearings; a stator core of the stator is provided with double-row grooves including a deep-row groove and a shallow-row groove; stator winding is concentrated winding comprising first winding and second winding; coils of the first winding and the second winding are respectively wound in the deep-row groove and the shallow-row groove of the stator core; the adjacent coils of the first winding, which are wound in the deep-row groove, are wound forward and reverse; the adjacent coils of the second winding, which are wound in the shallow-row groove, are wound forward and reverse; the first winding is in parallel connection with the second winding after series connection with capacitance or the second winding is in parallel connection with the first winding after series connection with capacitance. The single-phase capacitor-operated motor can save wires by about 20%; motors with thin iron core and large winding span witness more obvious saving of copper content for windings; in addition, the winding shortens the axial length of the motor; manufacturing of the stator winding achieves machine winding, simplifies the processing flows and improves the production efficiency of the stator; besides, the concentrated stator winding adopted by the invention has high coefficient and good motor property and is suitable for motors with different poles and power.

The invention relates to a low-altitude wind shear identification method based on an automatic meteorological station. The method comprises the following steps: obtaining historical data of each windelement in a monitoring area; Performing quality control and time synchronization on the historical data to obtain a data list; Selecting effective data actually subjected to wind shear, and calculating a shear value of each wind factor; Scaling a standard value according to the distance between every two automatic meteorological stations, and comparing the standard values with a wind shear discrimination threshold to obtain a label of whether wind shear occurs or not; Taking each wind factor as an input, taking a label with wind shear as a result to form a data set, and using an SMOTE algorithm to balance the number of the two label types; A machine learning method is used for training, and an identification model is output; And reading the latest data of each automatic meteorological station, and inputting the latest data into the identification model to obtain an identification result. The method has the advantages of being high in recognition precision and good in local adaptability, the horizontal wind shear near the ground of the runway can be effectively recognized, and the guarantee efficiency of meteorological services is improved.

The invention provides a two-branch flat wire conductor stator winding and a motor. The two-branch flat wire conductor stator winding comprises a stator body, stator slots, a flat wire conductor and an end part conductor, wherein z stator slots are arranged on the stator body; 2n layers of flat wire conductors are arranged in the stator slots; 2n layers of flat wire conductors in different statorslots are connected with each other through end part conductors to form a winding; every n layers of flat wire conductors are connected through end conductors to form a branch circuit. According to the flat wire conductor stator winding with the two branches provided by the invention, the problem of unbalanced branches in a motor in an existing flat wire winding mode is solved through the structure of the stator body, the stator slots, the flat wire conductors and the end part conductors; two branches formed in a flat wire winding mode are equal in resistance, high in winding coefficient, lowin winding harmonic content, sufficient in material utilization, small in end portion and wide in market application value.

The invention belongs to the technical field of motors, and in particular relates to a novel inner rotor permanent magnet motor with permanent magnet. The inner rotor permanent magnet motor comprises a stator assembly and a shaft type inner rotor inside the inner rotor, wherein the rotor assembly comprises a stator iron core and a stator coil which is wound on the stator iron core; the stator iron core is of a big and small slot structure which comprises big slots and small slots; the number of the small slots is equal to the number of the big slots; the small slots are correspondingly distributed on the top of the each tooth of the stator iron core; the ratio of the number of the big slots to the number of poles of the rotor is in a fractional slot design; the ratio of the number of the big slots to the number of poles of the rotor meets the following formula: the ratio is equal to (2p+/-1)/3: 2p, wherein p represents pole pairs of the motor; and the total number of the stator iron core is (2p+/-1)/3*2. On the basis of keeping higher processing property, slot insulation materials of the inner rotor permanent magnet motor are reduced, the winding coefficients are high, the harmonic content is small and the efficient running of the motor can be ensured. The inner rotor permanent magnet motor can be widely applied to an axial flow fan and other electrical equipment, thus ensuring preferable usability of the axial flow fan and the other electrical equipment.

The invention provides a rotor stator structure of a permanent magnet brushless DC motor, which belongs to the technical field of motors. It solves the problems of low torque density and control precision of the existing permanent magnet brushless DC motor. The stator structure of the permanent magnet brushless DC motor includes stator teeth, stator slots and stator windings. The stator teeth include a number of armature teeth and auxiliary teeth. The width of the top and teeth, a number of armature teeth and a number of auxiliary teeth are spaced apart from each other in turn, a stator slot is formed between adjacent armature teeth and auxiliary teeth, the stator winding is embedded in the stator slot and each armature tooth Both are wound with a stator winding. The motor adopts the unequal tooth width design of the armature teeth and auxiliary teeth, which improves the winding coefficient of the motor. At the same time, by rationally designing the tooth width of the armature teeth and auxiliary teeth, the distribution of the magnetic density of the teeth is optimized to avoid saturation of the teeth and improve The output torque of the motor is improved, and the control accuracy of the motor is improved.

The invention is a self-excited generator's multiphase exciter, characterized in that: primary winding of the generator is designed into concentric single-double layer winding of low-harmonic magnetometive force, base wave winding coefficient is high, and the 5th and 7th harmonics are largely weakened or eliminated, therefore the power generating efficiency is high and the voltage has good sine property. And it overcomes the interference phenomenon caused by obtaining excitation source from generator end or base wave auxiliary winding, and it is a self-exciter without interference to output power.

The invention discloses a double-layer full-pitch winding coreless linear permanent magnet synchronous motor, and relates to the field of motors. The invention aims to solve the problems that the existing bilateral secondary coreless structure linear permanent magnet synchronous motor adopts an integer slot single-layer winding, two effective edges of a coil are in the same plane, the end parts ofthe coil are overlapped, and the insulation characteristic is poor, and the problem that the heat dissipation performance is poor because the winding is completely packaged in epoxy resin with a lowheat conductivity coefficient. By adopting the double-layer full-pitch winding, the winding factor and the thrust density are improved, the thrust fluctuation of the motor and the eddy-current loss ofthe secondary permanent magnet are reduced, the non-overlapping of the end parts of the coils is realized, and the insulating property of the winding is improved. The end part of the coil is directlycooled by liquid, so that the cooling capacity and output capacity of the motor are improved. The winding substrate is made of a high-strength material, so that the primary structural strength of themotor and the armature coil arrangement precision are improved. By reasonably designing the size of the secondary iron core near the end part of the winding, the leakage reactance of the winding is increased, the current harmonic is reduced, and the secondary permanent magnet eddy-current loss is reduced.

The invention relates to a high-temperature superconducting induction motor stator. First to sixth parts of the stator structure are respectively placed in first to sixth opened rectangular grooves; first two sixth copper coils are respectively embedded at the notches of the first to sixth opened rectangular grooves; the parts, extending out of the end part of a stator core (1), of the first to sixth copper coils circumferentially and respectively bend along the inner diameter of the stator core (1) so as to prevent end coils from intersection, and cannot contact first to sixth superconducting coils. According to the stator, the problem that relatively large pulsating torque is generated as the arrangement and fixation of the superconducting coils in a stator slot are difficult and the superconducting winding coefficients are too low overcome, superconducting coil fixing frames are prevented from generating eddy-current loss, the superconducting cooling cost is reduced, the volume and weight of a superconducting motor are greatly decreased, and the power factor and efficiency of the motor are improved.

The invention discloses a cold zone tunnel longitudinal temperature experimental device involving a train piston wind factor. The device comprises a constant temperature warehouse, a wind speed control device, a tunnel model, a train model device, a thermostatic bath, wind speed sensors, temperature sensors, and a data acquisition system; the constant temperature warehouse is used for providing acold source; the wind speed control device is used for providing wind energy; tunnel model units are spliced to form the tunnel model; the thermostatic bath is composed of thermostatic bath units which are independently arranged; the thermostatic bath unit wraps the outer surface of the corresponding tunnel model unit; and the wind speed sensors and the temperature sensors are disposed in the tunnel model and are electrically connected with the data acquisition system. With the experimental device for testing the longitudinal temperature distribution law of tunnels in a cold zone under a one-way or two-way ventilation condition provided by the invention adopted, the distribution law of the longitudinal temperature of long tunnels under the conditions of different tunnel lengths, differenttunnel portal temperatures, different tunnel portal wind speeds, different surrounding rock initial temperatures and the like can be simulated; and accurate parameters can be provided for the laying length of the insulation layers of the long tunnels in the cold zone.