157 results about "Reluctance torque" patented technology

The utility model discloses a rotor structure of a permanent magnet auxiliary reluctance motor, which comprises a rotor punching sheet, a plurality of magnetic steel groove groups are fixedly arranged on the rotor punching sheet, each magnetic steel groove group consists of a plurality of layers of magnetic steel grooves, corresponding magnetic steel bodies are arranged in the magnetic steel grooves, the magnetic steel bodies are rectangular, and the magnetic steel bodies are rectangular. The rotor punching sheet is used for a permanent magnet auxiliary reluctance motor with the rotor punching sheet, the motor is provided with a multilayer magnetic steel structure, large reluctance torque can be obtained, for a rotor with N layers of magnetic steel grooves, the types of magnetic steel can be reduced from 2N-1 to N, 2 or 1, the types of magnetic steel can be reduced, and the purchase, production and management costs of the motor can be reduced.

The invention provides an asymmetric rotor structure for improving the torque density of a motor, a motor and a method, the rotor structure comprises an iron core, the iron core is provided with a shaft hole, a plurality of magnetic steel groups are distributed in the circumferential direction of the shaft hole of the iron core at equal intervals, and each magnetic steel group comprises a plurality of permanent magnet mounting groove structures, an air groove structure and a plurality of permanent magnet structures, each permanent magnet mounting groove structure is correspondingly provided with one permanent magnet structure; any number of permanent magnet mounting groove structures are configured to have a first arrangement direction on the iron core, and the air groove structures are configured to have a second arrangement direction on the iron core; wherein the first layout direction and the second layout direction are asymmetrically arranged in a space coordinate; a magnetic flux path is blocked, and magnetic flux leakage is reduced. The asymmetric design can optimize the magnetic field distribution of the permanent magnet, so that the phase difference between the reluctance torque component and the permanent magnet torque component is greatly reduced, and the effective torque superposition of the reluctance torque component and the permanent magnet torque component under wider working conditions is realized.

The present invention discloses an asymmetric rotor structure of a permanent magnet-assisted bearingless synchronous reluctance motor. Four groups of U-shaped magnetic barriers are evenly arranged along the circumferential direction inside the rotor. Each group of U-shaped magnetic barriers is divided into an outer layer, a middle layer, and an inner layer. The openings of the three layers of magnetic barriers face outward, and a permanent magnet is embedded in the center of the bottom wall of each layer of magnetic barriers. The outer and middle layers of magnetic barriers are symmetrical about the d-axis. One of the outer sections of the U-shaped side walls of the inner layer of magnetic barriers extends a small rectangular magnetic barrier parallel to the q-axis in the q-axis direction at the end facing the q-axis. A first small rectangular permanent magnet is fixedly embedded in the small rectangular magnetic barrier. A second small rectangular permanent magnet perpendicular to the first small rectangular permanent magnet is fixedly embedded in the outer section of the U-shaped side wall with the small rectangular magnetic barrier, forming a rotor topology in which both the magnetic barriers and the permanent magnets are asymmetric. The reluctance torque and the permanent magnet torque reach peak values ​​at similar or even the same current angles, thereby increasing the output torque synthesized by the reluctance torque and the permanent magnet torque.

The invention discloses a rotating speed loop control method for stable magnetic adjustment of a magnetic flux adjustable permanent magnet synchronous motor, belongs to the field of motor control, and aims to solve the problem that reluctance torque changes drastically during online magnetic adjustment of the magnetic flux adjustable permanent magnet synchronous motor. The method comprises the following steps of: 1, training a neural network model by taking an inductance parameter and a permanent magnet flux linkage which change along with a magnetization state and a direct-axis current as a data set; step 2, obtaining motor quadrature-direct axis current according to the collected stator current and rotor position information, and obtaining prediction values of motor inductance parameters and permanent magnet flux linkage through the trained model; 3, inputting the motor quadrature-direct axis current, the inductance parameter prediction value and the permanent magnet flux linkage prediction value into a torque-current gain adjuster to obtain a reluctance torque corresponding component prediction value and an adjusted torque-current gain; 4, obtaining a given value of quadrature-axis current, and further obtaining a driving signal of the inverter; and repeating the steps 2-4, and suppressing the torque rotating speed pulsation during the magnetic adjusting period.

The invention discloses an asymmetric permanent magnet auxiliary synchronous reluctance motor rotor structure for a new energy vehicle, and relates to the technical field of motor rotor structures, the asymmetric permanent magnet auxiliary synchronous reluctance motor rotor structure comprises an asymmetric rotor, the right side of the front part of the asymmetric rotor is connected with a first outer side air slot A, and the left side of the first outer side air slot A is provided with a second outer side air slot A; and the bottom side of the second outer side air slot A is connected with a second outer side air slot B. The rotor has the advantages that by constructing a phase coordination mechanism of an asymmetric magnetic circuit topology, optimization of current phase angle difference of permanent magnet torque and reluctance torque is realized, the comprehensive performance of the motor is further improved, the rotor adopts a composite configuration of a double-layer U-shaped magnetic barrier and a spoke type magnetic barrier, and the rotor is more compact in structure and more compact in structure. Differentiation configuration is carried out on permanent magnet space distribution based on the axis asymmetry principle, so that phase cooperation of the maximum value of the reluctance torque and the maximum value of the permanent magnet torque is achieved, and the dual optimization objectives of torque density improvement and pulsation suppression are achieved.

The invention relates to a rotor punching sheet, a rotor, a motor and a vehicle, the rotor punching sheet comprises a shaft hole and a plurality of magnetic pole parts, the shaft hole is located in the center of the rotor punching sheet, the plurality of magnetic pole parts are arranged at intervals along the circumferential direction of the shaft hole, each magnetic pole part comprises a plurality of first magnetic steel grooves for accommodating magnetic steel, and the plurality of first magnetic steel grooves are arranged at intervals along the radial direction of the rotor punching sheet. And along the radial direction of the rotor punching sheet, the thickness of the first magnetic steel groove closer to the shaft hole in the plurality of first magnetic steel grooves is larger. According to the rotor punching sheet, the arrangement positions of the plurality of first magnetic steel grooves in the rotor punching sheet are reasonably designed, and the structures of the plurality of first magnetic steel grooves are optimized, so that the filling amount of the magnetic steel can be improved in a limited space of the rotor punching sheet under the condition that relatively large reluctance torque is ensured; therefore, the electromagnetic torque provided by the magnetic steel in the first magnetic steel groove is further increased, and the output torque is further improved.

The invention provides a rotor structure with asymmetric magnetic poles, a permanent magnet motor and a manufacturing method, the rotor structure comprises an iron core, the iron core is provided with a shaft hole, a plurality of magnetic steel groups are arranged along the periphery of the shaft hole of the iron core at equal intervals, and each magnetic steel group comprises a plurality of permanent magnet mounting grooves and permanent magnets corresponding to the permanent magnet mounting grooves in number, a permanent magnet is arranged in each permanent magnet mounting groove; wherein the sizes of the plurality of permanent magnet mounting grooves are configured to be different, and the spatial position relationship among the plurality of permanent magnet mounting grooves is arranged to be an asymmetric structure. The sizes of the plurality of permanent magnet mounting grooves are configured to be different, so that the limitation of a traditional symmetrical structure is broken through. The asymmetric design can optimize the magnetic field distribution of the permanent magnet, so that the phase difference between the reluctance torque component and the permanent magnet torque component is greatly reduced, and the effective torque superposition of the reluctance torque component and the permanent magnet torque component under wider working conditions is realized.

The invention relates to the technical field of motor control, and discloses a motor optimization control method and system based on q-axis voltage control, and the method comprises the steps: carrying out the Clark-Park conversion and sliding mode observation of a three-phase current signal and a three-phase voltage signal, and obtaining a d-axis current signal, a q-axis current signal, a d-axis flux linkage component and a q-axis flux linkage component; performing recursive least square identification processing to obtain a real-time salient pole ratio value; reluctance torque angle arc tangent calculation and d-q axis coupling quantity product operation are carried out to obtain reluctance torque coupling disturbance quantity; according to the method, the limitation that in the prior art, work is only carried out near an MTPA curve is broken through, the adverse effect of d-q-axis cross coupling on q-axis voltage control precision is effectively eliminated, and the control precision of the q-axis voltage is improved. And the torque output capability and the dynamic response performance of the motor under various working conditions are improved.

The invention discloses a high reluctance ratio rotor punching sheet, which comprises a punching sheet main body and a magnetic pole unit arranged on the punching sheet main body, the magnetic pole unit comprises a first layer of permanent magnet slots, a second layer of permanent magnet slots and rectangular magnetic isolation holes, permanent magnets penetrate through the first layer of permanent magnet slots and the second layer of permanent magnet slots, and the rectangular magnetic isolation holes are formed in the first layer of permanent magnet slots and the second layer of permanent magnet slots. The first layer of permanent magnet slots comprises two permanent magnet slots, the second layer of permanent magnet slots comprises two permanent magnet slots, the two permanent magnet slots are distributed in a V shape, the first layer of permanent magnet slots and the rectangular magnetic isolation holes are located between the two permanent magnet slots, and the first layer of permanent magnet slots and the rectangular magnetic isolation holes are oppositely arranged. According to the rotor punching sheet with the high reluctance ratio, the salient pole ratio of a motor is improved through the optimal design of the magnetic poles, so that the reluctance torque of the motor is improved, the use amount of the rare earth permanent magnets is reduced, and the purpose of reducing the cost is achieved. The invention also discloses a rotor core, a driving motor and a vehicle.

The invention discloses a rotor and a synchronous reluctance motor with the same. In the invention, the rotor has an even number of magnetic barrier structures, each magnetic barrier structure comprises a plurality of arc-shaped magnetic barrier layers, the plurality of arc-shaped magnetic barrier layers of each magnetic barrier structure have the same symmetry axis, each arc-shaped magnetic barrier layer comprises five sections of magnetic barriers, two sections of outermost magnetic barriers are mutually symmetrical about the symmetry axis, and two sections of middle magnetic barriers are mutually symmetrical about the symmetry axis. A section of the innermost magnetic barrier is symmetrical about the symmetry axis, so that the reluctance torque of the motor can be fully utilized to improve the output performance of the motor by means of the design of the multiple layers of magnetic barriers with the same symmetry axis. In addition, the two outermost magnetic barriers are not filled with magnetic substances, so that the magnetic substances are far away from the stator winding to reduce the risk of demagnetization of the magnetic substances.

The invention relates to an asymmetric magnetic pole rotor and a motor. Arc-shaped magnetic barriers are asymmetric about the geometric center line of an N-pole magnetic pole, and arc-shaped permanent magnets are asymmetric about the geometric center line of the N-pole magnetic pole; the N pole and the S pole of the asymmetric magnetic pole rotor topology are asymmetric about the geometric center line of the two magnetic poles; the arc-shaped magnetic barrier is divided into three layers; and the S pole topology is asymmetric, namely, the N pole is obtained by rotating 45 degrees. A reinforcing rib is designed at the geometric center of a magnetic pole of the rotor topology; according to the asymmetric magnetic pole rotor design, the magnetic field can be shifted, under the condition that the permanent magnet torque is basically unchanged, the asymmetric magnetic pole rotor topology increases the reluctance torque through the magnetic field shifting effect, and then the output torque is increased; the magnetic field distribution is optimized, and the sine degree of the air gap flux density waveform is improved, so that compared with the original scheme, the optimized scheme has the advantages that the peak torque is obviously improved, and the torque ripple and the radial electromagnetic force are obviously reduced.

The invention discloses a TBM cutterhead main drive intelligent decision-making method and system, and belongs to the technical field of cutterhead drive control. Unified regulation and control and target torque distribution of a driving system are realized by constructing a master-slave type multi-driving-unit collaborative architecture; a fault is identified by monitoring a current signal, a voltage vector is reconstructed according to the fault type, and continuous and stable output under the fault is ensured; a disturbance observation method based on an integral sliding mode is provided, and control deviation caused by system disturbance and parameter changes is dynamically estimated and compensated; an MPTA control strategy of high-frequency virtual signal injection is designed, and utilization of reluctance torque and stable tracking of an MTPA working point are achieved; the torque output capacity of a fault unit and the torque margin of a healthy unit are comprehensively considered, a load distribution strategy is planned, and the overall loading capacity and the operation life of the driving system are improved.

The invention provides a rotor structure and a motor, the rotor structure comprises a rotor iron core, first permanent magnets and second permanent magnets are alternately arranged on the rotor iron core along the circumferential direction, and the first permanent magnets and the second permanent magnets are magnetized along the radial direction of the rotor iron core; third permanent magnets are arranged between the second permanent magnets and the adjacent first permanent magnets on the rotor iron core, and the third permanent magnets are magnetized in the tangential direction of the rotor iron core. The polarities of the sides, close to the outer peripheral surface of the rotor core, of the second permanent magnets and the first permanent magnets are opposite; every two adjacent third permanent magnets are opposite and the polarities of the opposite surfaces are the same; for the same third permanent magnet, the included angle between the radial geometric center line of the third permanent magnet and the radial geometric center line of the adjacent second permanent magnet is alpha, the included angle between the radial geometric center line of the third permanent magnet and the radial geometric center line of the adjacent first permanent magnet is beta, and alpha / beta is equal to 0.55-0.98, so that the reluctance torque of the motor can be relatively large, and the total output torque of the motor can be increased; and the torque density of the motor is improved.

Disclosed are various embodiments for switched reluctance machines having a rotor comprising a plurality of rotor core assemblies configured to form a reluctance torque tunnel having at least a first reluctance tunnel segment and a second reluctance tunnel segment and a stator having a plurality of coils configured to form a coil winding assembly, the coil winding assembly positioned within the reluctance torque tunnel, such that at least one of the plurality of coils is surrounded by the first reluctance tunnel segment or the second reluctance tunnel segment, alternatively the rotor may be the coil winding assembly and the stator may be the reluctance torque tunnel.

The invention discloses a unit cascade type motor speed regulation control compensation method and system, relates to the technical field of motor control, and solves the problems that during motor operation, temperature rise, magnetic saturation or load sudden change can cause dynamic parameter change, parameters are not identified in real time, the reluctance torque compensation error is large, and the stability of the motor is poor. And the motor speed regulation control compensation accuracy is influenced. The reluctance torque is strongly correlated with the difference value of the Ld-Lq, and the difference value of the Ld-Lq is influenced by the motor design and the working condition. The RLS can accurately quantify the nonlinear part of the reluctance torque through online identification of the Ld-Lq difference value, and the limitation of a traditional table look-up method or offline calibration is avoided. Through cross coupling of a d-q axis current loop, the RLS can decouple mutual influence among parameters by identifying inductance parameters at the same time, and the bandwidth of the current loop is improved; meanwhile, the temperature rise of the motor can cause inductance drift, and the compensation amount is adjusted by continuously monitoring the inductance change, so that the torque attenuation caused by the temperature rise is avoided.

Electric motor (16) capable of generating a total motor torque with continuously variable magnetic and reluctance torque components, the electric motor (16) comprising: a stator arrangement (26) with stator windings (26W) and a stator core (26C) with an axial length (L S ); a rotor arrangement (33) comprising a rotor shaft (17) and a cylindrical rotor hub (33R) each with respective axial lengths (L R ) includes, wherein the cylindrical rotor hub (33R) has a first end (E1) with a first mean magnetic field strength and a second end (E2) with a second mean magnetic field strength, the second mean magnetic field strength being weaker than the first mean magnetic field strength; and a return spring (64) located near the first or second end (E1, E2) of the rotor hub (33R); wherein the rotor hub (33R) is displaceable relative to the rotor shaft (17), wherein the axial length (L R ) the rotor hub (33R) the axial length (L S ) of the stator core (26C) and the rotor hub (33R) is configured to move along the axial length of the rotor shaft (17) to vary the contributions of the magnetic and reluctance torque components to the total motor torque in response to different speed and torque operating points of the electric motor (16) relative to each other; characterized by a controller (50) configured to receive a set of input signals, including a rotational speed of the electric motor (16) and a torque generated by the electric motor (16), and to displace the rotor hub (33R) along the axial length (L R) the rotor shaft (17) in response depending on the received rotational speed and torque, in order to continuously vary the relative contributions of the magnetic and reluctance torque components to the total motor torque; wherein the controller (50) is further configured to apply a magnetic flux attenuation stator current to the stator windings (26W) in order to limit the rotor hub (33R) along the axial length (L R ) of the rotor shaft (17) to be passively displaced.

Rotating electric machine (10) comprising a rotor (12) with a rotor shaft (13) located on a rotor axis and a stator (11) rotatably receiving the rotor (12), wherein the stator (11) comprises several teeth (15) extending in the direction of a circumferential surface of the rotor (12) and terminating at inner circumferential surfaces opposite the circumferential surface of the rotor (12), and several slots (18) located between two adjacent teeth (15) and providing spaces for winding coils around the teeth (15) for the input of the electrical drive power, wherein the rotor (12) has several permanent magnets (16) embedded therein to exert the magnetic force on those surface sections of the teeth (15) which are opposite the permanent magnets (16), wherein the rotor (12) within the stator (11) is driven to rotate by the reluctance torque originating from the magnetic flux flowing through the teeth (15), the rear side of the surface of the teeth (15) and the rotor (12) when current flows through the coils, and the magnetic moment in the form of attraction and repulsion originating from the interference with the permanent magnets (16), wherein an outside diameter ratio of an outside diameter Dr of the rotor (12) to an outside diameter Ds of the stator (11) falls within a range effective for minimizing torque ripple, wherein, where a set of permanent magnets (16) of the multiple permanent magnets (16) corresponds to a set of slots (18) of the multiple slots (18) and forms a magnetic pole, and the set of slots (18) comprises a number of six slots (18), the ratio of the outside diameters Dr / Ds falls within the range expressed as follows: 0.615 ≤ Dr / Ds ≥ 0.63, wherein the rotating electric machine (10) is designed to satisfy a condition which is expressed as follows: L t / D r ≤ 0.04 2 L t ≤ L b 0.35 ≤ d / L s ≤ 0.44 0.32 ≤ L s / L t where: Lt is the thickness of each of the multiple teeth (15), Lb is the thickness of the back side of the surface of each of the multiple teeth (15), d is the diameter of the conductor of the coils, and Ls is the width of the opening of each of the multiple slots (18), wherein the multiple permanent magnets (16) and the multiple slots (18) form an 8-pole 48-slot motor, a 6-pole 36-slot motor, a 4-pole 24-slot motor, or a 10-pole 60-slot motor.

The invention relates to the technical field of motor rotor punching sheets, in particular to a motor rotor punching sheet structure and a rotor, which comprises a rotor punching sheet, eight groups of first-layer V-shaped magnetic steel grooves are arranged on the rotor punching sheet in an annular array, and each first-layer V-shaped magnetic steel groove is composed of two linear groove bodies. The two ends of each group of first-layer V-shaped magnetic steel grooves are provided with first-layer magnetic steel groove air magnetic isolation grooves close to the outer diameter end of the rotor and first-layer magnetic steel groove air magnetic isolation grooves close to the inner diameter end of the rotor respectively, the bottom end of each group of first-layer V-shaped magnetic steel grooves is provided with first-layer magnetic steel groove magnetic bridges, and second-layer magnetic steel is placed in the second-layer V-shaped magnetic steel grooves. A plurality of V-shaped magnetic steel groove magnetic bridges are arranged on the outer side of the rotor punching sheet in an annular array mode, through the design of the double-layer V-shaped magnetic steel groove rotor punching sheet structure, a magnetic circuit is optimized, leakage magnetic flux is reduced, reluctance torque is increased, cogging torque is reduced, the torque and power density of the motor are improved, the leakage magnetic flux of each magnetic pole is weakened, and the main magnetic flux of the motor is enhanced.

The utility model discloses a kind of rare-earth-free magnetic-assisted synchronous reluctance high-efficiency shielding electric pump, including pump cavity mechanism and drive mechanism.Pump cavity mechanism contains pump body, and front bearing seat and impeller in pump cavity are formed by being enclosed with pump body;Drive mechanism contains pump shaft with one end being connected with impeller, front bearing sealing assembly, rotor assembly, rear bearing sealing assembly and rear bearing seat are sequentially set on pump shaft, and stator assembly is arranged outside rotor assembly with pump shell.Rotor assembly includes reluctance rotor lamination, at least four groups of magnetic barrier that are rotationally symmetric with lamination center as center, peripheral shielding sleeve and two end plates and screen plate.Magnetic barrier contains magnetic-assisted permanent magnet slot group and both sides through slot group.The electric pump rotor adopts rare-earth-free permanent magnet magnetic-assisted synchronous reluctance design, optimizes magnetic circuit, and cooperates with synchronous reluctance and permanent magnet magnetic-assisted to improve motor power density and efficiency;Through slot group obtuse angle included angle and symmetrical layout reduce magnetic flux leakage, enhance reluctance torque, make torque output more stable, improve electric pump power performance and working condition adaptation ability.

The utility model relates to the technical field of rotor punching sheets, in particular to a rotor punching sheet structure, which comprises a rotor punching sheet and a stator, the stator is arranged on the outer side of the rotor punching sheet, a plurality of groups of V-shaped magnetic steel grooves are arranged on the rotor punching sheet, four V-shaped magnetic steel groove positions are oppositely arranged on the edge of each V-shaped magnetic steel groove, outer diameter air magnetic isolation grooves are arranged at two ends of each V-shaped magnetic steel groove, and the outer diameter air magnetic isolation grooves are arranged in the outer diameter air magnetic isolation grooves. A plurality of V-shaped magnetic steel grooves are formed in the rotor punching sheet, magnetic steel bodies located at linear groove bodies are placed in the V-shaped magnetic steel grooves, an inner magnetic bridge is arranged between every two adjacent V-shaped magnetic steel grooves, a plurality of outer magnetic bridges located on the outer sides of the V-shaped magnetic steel grooves are arranged on the outer side of the rotor punching sheet, and de-weight holes and V-shaped magnetic steel grooves with large openings in pin hole punching sheets are formed in the rotor punching sheet in an annular array mode. The reluctance torque of the motor can be generated, and the output torque of the motor can be increased; the punching sheet body is provided with the air magnetic isolation grooves, the pole radian coefficient of the magnetic pole can be adjusted, and magnetic leakage of the magnetic steel can be reduced.

The application discloses a TBM cutter head main drive intelligent decision method and system, and belongs to the technical field of cutter head drive control. By constructing a master-slave type multi-drive unit collaborative architecture, unified regulation and control and target torque distribution of the drive system are realized; by monitoring current signals to identify faults, voltage vectors are reconstructed according to fault types, and continuous and stable output under faults is ensured; a disturbance observation method based on integral sliding mode is proposed, control deviation caused by system disturbance and parameter change is dynamically estimated and compensated; an MPTA control strategy of high-frequency virtual signal injection is designed, utilization of reluctance torque and stable tracking of the MTPA operating point are realized; the torque output capacity of the fault unit and the torque margin of the healthy unit are considered as a whole, a load distribution strategy is planned, and the overall load carrying capacity and operating life of the drive system are improved.

The present invention provides an embedded magnet type rotor that suppresses short circuits of magnetic flux in the rotor's magnetic poles, increases reluctance torque, and suppresses the effects of stress generated in the rotor core. [Solution] In an embedded magnet rotor having multiple magnetic poles formed in the circumferential direction of an iron core, each magnetic pole comprises a magnet arranged on the iron core in a V-shaped pattern with increasing spacing toward the outer circumference of the rotor, and a pair of flux barriers formed at the inner circumferential end of the magnet on the iron core. The flux barriers are formed to protrude further inward than the inner circumferential end of the magnet, and have portions that protrude toward the d-axis of the magnetic pole and portions that protrude toward the q-axis of the magnetic pole.

The invention discloses a driving / charging integrated system and a single-phase charging method based on an electro-magnetic doubly salient motor, which are characterized in that three change-over switches K1, K2 and K3 are added on the basis of the existing driving and charging integrated system topology, and integration of a single-phase charging function is realized on the basis of driving and three-phase charging. Two sections of split excitation windings which are reversely connected in series and a pre-stage circuit are multiplexed into a single-phase bridgeless PFC rectifier through a change-over switch, and an armature winding and an inverter bridge are multiplexed into three Buck circuits which are connected in parallel together, so that the charging voltage and current of a power battery are effectively controlled together, and excitation torque and reluctance torque which are generated by multiplexing the windings are eliminated at the same time.

A collaborative control method and system for a permanent magnet assisted synchronous reluctance motor is disclosed. In this method, the permanent magnet torque component and the reluctance torque component are calculated. Within a single preset control cycle, the current vector angle is adjusted to increase the permanent magnet torque component and decrease the reluctance torque component, forming a torque component unbalanced state. Under startup conditions, starting from the torque component unbalanced state, the current vector angle is gradually increased according to a preset step size to decrease the permanent magnet torque component and increase the reluctance torque component, and the total system loss is calculated. When it is determined that the total system loss reaches its minimum value within a preset time period, the current vector angle corresponding to the minimum total system loss is taken as the target current vector angle. Based on the target current vector angle, d-axis current commands and q-axis current commands are calculated and output to the current loop controller. This application aims to improve the torque response speed and energy utilization efficiency of a permanent magnet assisted synchronous reluctance motor in a water pump or fan under startup conditions.

The present application relates to the technical field of forklift motor, and particularly relates to a forklift motor energy-saving operation method and system based on reluctance torque vector optimization, which collects motor operation parameters through a sensor, fuses multi-source dynamic characteristics by using a parallel time sequence feature extraction network, extracts working condition characteristics in combination with bidirectional domain adaptive transfer learning, determines the number of key factors based on a dynamic working condition correlation matrix, generates a motor control characteristic vector through convex optimization and probability density estimation, generates a control scene in combination with a reluctance torque model and a phase current coupling relationship, calculates an energy efficiency index based on torque response and energy consumption distribution matching degree, and solves optimal control parameters by using a multi-objective optimization algorithm. The parameters are input into a grouping collaborative control unit, control groups are divided according to phase space distribution, optimal reluctance torque vectors are calculated by using an energy consumption dynamic prediction model through an intra-group competition and inter-group cooperation mechanism, and high-efficiency energy-saving operation under low-speed large-torque and frequent start-stop working conditions is realized.

The invention provides a rotor structure and a motor. The rotor structure comprises a rotor core (2) and permanent magnets (6), magnetic barrier layers (1) and magnetic steel grooves (5) are arranged on the rotor core (2), the multiple magnetic barrier layers (1) are arranged at intervals in the d-axis direction, each magnetic barrier layer (1) comprises an air groove (4) and a filling groove (7), each filling groove (7) comprises q-axis filling grooves (71) located on the two sides of the corresponding air groove (4), and the magnetic steel grooves (5) are located on the radial outer sides of the magnetic barrier layers (1) in the d-axis direction. The permanent magnets (6) are arranged in the magnetic steel grooves (5), under one pole, the radial center line of each permanent magnet (6) forms an offset angle delta relative to the d axis, and delta is larger than or equal to 2 degrees and smaller than or equal to 8 degrees. According to the rotor structure, the utilization rate of the permanent magnets can be improved, the electromagnetic torque and the reluctance torque are improved, and the output capacity of the motor is improved.

This invention provides a rotor, a motor, and a vehicle. The rotor includes: a rotor core; and multiple magnets, including a first magnet, a second magnet, and a third magnet. The rotor core includes: a core body with a magnet mounting portion. The magnet mounting portion includes: a first magnet slot group for mounting the first magnet, including a first magnet slot, the first magnet slot including a first sub-magnet slot, the included angle between the slot walls of two first sub-magnet slots near the axis being α1; a second magnet slot group for mounting the second magnet, including a second magnet slot, the second magnet slot including a second sub-magnet slot, the included angle between the slot walls of two second sub-magnet slots near the axis being α2; and a third magnet slot group for mounting the third magnet, including a third magnet slot, the included angle between the slot walls of two third magnet slots located on opposite sides of the axis being α3, where α3 > α1 > α2. This structure increases the reluctance torque ratio, reduces the amount of magnets used, and effectively increases the power density of the motor.

The embodiment of the invention provides a positive salient pole enhanced hybrid magnetic pole permanent magnet motor with a high reluctance torque utilization rate, and belongs to the field of motors. The positive salient pole enhanced hybrid magnetic pole permanent magnet motor with the high reluctance torque utilization rate comprises a stator structure and a hybrid magnetic pole rotor, the hybrid magnetic pole rotor comprises a magnetic flux adjusting rotor magnetic pole unit and an inductance adjusting rotor magnetic pole unit, and the magnetic flux adjusting rotor unit can change permanent magnet air gap magnetic flux. The inductance adjusting rotor magnetic pole unit can realize the adjustment of inductance parameters. Compared with a traditional magnetic leakage controllable motor, by arranging the magnetic flux adjusting and inductance adjusting independent rotor magnetic pole units, the utilization rate of the permanent magnets is improved, the salient pole characteristic of the motor is further improved, and the utilization rate of reluctance torque is improved; and through rotor magnetic pole offset, the output torque is increased and the torque pulsation is suppressed.

The application discloses a rotor structure of an asynchronous starting non-uniform magnetic barrier double-speed variable-pole permanent magnet motor and a reverse design method thereof, and first, air gap permeance design based on a magnetic resistance torque component and air gap flux density design based on a permanent magnet torque component are completed, and then, synthesis optimization design of non-uniform magnetic barriers and permanent magnets is completed based on the air gap permeance and the air gap flux density; based on the design method, the rotor structure is obtained as follows: the permanent magnets are built-in the rotor core, two adjacent permanent magnets are separated by a magnetic barrier, and the span of different magnetic barriers is set so that the magnetic barriers are asymmetrically distributed. Based on the modulation effect of the rotor structure on the air gap magnetic field, the pole pair number of working harmonics in the air gap magnetic field is selected by using the stator winding, and variable-pole variable-speed operation of the motor is realized; and the amount of the permanent magnets is low, and the material cost of the motor is greatly reduced.

At least two magnetic steel grooves are formed in the end face of the rotor punching sheet in the circumferential direction at intervals, a plurality of arc-shaped magnetic circuit guiding grooves are formed in the two ends of each magnetic steel groove respectively, the magnetic circuit guiding grooves are located in the inner sides of the magnetic steel grooves, the magnetic circuit guiding grooves are bent in the direction of the magnetic steel grooves, and the magnetic circuit guiding grooves are bent in the direction of the magnetic steel grooves. The plurality of magnetic circuit guiding grooves are arranged at intervals along the radial direction of the rotor punching sheet, and the widths of the cross sections of the plurality of magnetic circuit guiding grooves at one end of the magnetic steel groove are gradually reduced along the direction close to the center of the rotor punching sheet. Two ends of each magnetic steel groove are respectively provided with a plurality of arc-shaped magnetic circuit guide grooves, and the widths of the plurality of magnetic circuit guide grooves are gradually reduced along the direction of the center of the rotor punching sheet, so that magnetic lines can be guided from permanent magnet poles to silicon steel poles, the conduction path of the magnetic lines is prolonged, the magnetic resistance of the silicon steel poles is matched with that of the permanent magnet poles, and the salient pole ratio is increased; the reluctance torque is improved, and the torque reduction caused by the reduction of the use amount of the magnetic steel is made up.