32results about How to "Improve motor efficiency" patented technology

The invention discloses a rotor core skew rotation forming process which comprises the following steps: conveying a raw material sheet to a first station, stamping to form a wire slot, rotating an upper die of the station by a set angle every time the station is stamped, conveying the raw material sheet to a second station, stamping to form a buckling point, conveying the raw material sheet to a third station, and stamping to form a center hole. The raw material sheets are conveyed to a fourth station, the rotor punching sheets are obtained through punching and blanking, the rotor punching sheets fall into a blanking groove, after each rotor punching sheet falls into the blanking groove, the blanking groove rotates by a set angle, and the rotor punching sheets are laminated in the blanking groove to obtain the rotor iron core. The harmonic torque is effectively reduced, the magnetic field distribution of the motor is optimized, the efficiency of the motor is improved, and the circumferential angles of the rotor punching sheets are different due to the rotation of the blanking grooves during blanking, so that the error superposition of the same area of the rotor punching sheets is avoided, and the uniformity and the performance of a rotor iron core are improved.

The invention relates to a motor dynamic driving control method, device and system based on deep learning prediction. The method comprises the following steps: S1, acquiring current motor operation data; s2, predicting future motor operation data according to the current motor operation data through a prediction model; s3, judging a future motor working condition according to the future motor operation data; s4, selecting a control algorithm according to the future motor working condition; and S5, by taking the current motor operation data as an input condition, generating a control signal through the control algorithm. According to the method, the future change of the working condition of the motor can be mastered in time through the prediction model, so that a proper control algorithm is actively switched according to the future change, the dynamic response capability is relatively high, and relatively high motor efficiency and relatively good stability can also be obtained under special working conditions.

The invention provides a stator core, a permanent magnet synchronous motor, a compressor and an air conditioner, and the stator core comprises a stator yoke ring, and the radial inner circumferential wall of the stator yoke ring is uniformly provided with a plurality of stator teeth at intervals in the circumferential direction. Each stator tooth comprises a tooth boot and a connecting column connected between the tooth boot and the stator yoke ring, and a stator slot is formed between two adjacent stator teeth; extending lines, facing one side of the circumferential wall of the radial inner ring, of the side walls of two circumferential tooth shoes close to each other of two adjacent stator teeth divide the stator groove into a middle winding groove in the middle and side winding grooves located in the two circumferential sides of the middle winding groove, the groove area of the middle winding groove is S1, and the groove area of the side winding grooves is S2. The groove area of each side winding groove is S2, and S1 / S2 is larger than 0 and smaller than or equal to 0.537. The invention can avoid the reduction of the effective slot area S2 of the stator, the reduction of the number of windings and the reduction of the counter electromotive force of the motor caused by the overlarge area S1 of the middle winding slot in the stator core.

The utility model provides a drive assembly of an electric drive axle, the electric drive axle and a vehicle, the drive assembly of the electric drive axle comprises two drive mechanisms arranged on an axle housing assembly of the electric drive axle, each drive mechanism comprises a drive motor, an input shaft, an output shaft and an intermediate shaft, and the input shaft and the output shaft are coaxially arranged; the driving motor is connected with the input shaft, the input shaft is connected with the intermediate shaft through a first transmission pair, multiple transmission assemblies are arranged between the intermediate shaft and the output shaft, and the output shaft is connected with the differential mechanism through a second transmission pair. The output shaft is provided with a joint assembly which can be selectively jointed with the first transmission pair or the transmission assembly, and under the joint of the joint assembly, the input shaft and the output shaft are connected to form a direct power transmission path, or the input shaft is connected with the output shaft through the intermediate shaft to form an indirect power transmission path. The drive assembly of the electric drive axle can meet the requirements of various gears, the use performance of the electric drive axle can be improved, and the large-torque power requirement can be met.

The invention discloses an annealing method and tool for an iron core assembly, and belongs to the technical field of motor iron core machining, and the annealing method comprises the following steps: laminating and positioning a plurality of silicon steel sheets one by one, maintaining the pressure after laminating and assembling, and then welding and fixing to form the iron core assembly; putting the iron core assembly into a vacuum container, vacuumizing and heating the iron core assembly; after the temperature of the iron core assembly reaches the preset temperature, heat preservation is conducted for a period of preset time; and after heat preservation is finished and the temperature is reduced by 45%-50%, the vacuum container is opened, and then the iron core assembly is naturally cooled to the room temperature. The tool comprises at least two assemblies, the assemblies are in an arc shape, the inner sides of the assemblies are matched with the circumferential outer wall of the iron core assembly, and the multiple assemblies can be spliced end to end to form a barrel so as to restrain the circumferential direction of the iron core assembly; and the locking piece is used for locking and fixing the adjacent combined pieces. According to the invention, mechanical and thermal stress can be effectively eliminated, the iron loss is reduced from the overall structure, and the motor efficiency is improved when the overall structure is applied.

The invention discloses a stator punching sheet, a motor and a compressor, and relates to the technical field of motors, the stator punching sheet comprises a yoke part and a plurality of tooth parts, the plurality of tooth parts are arranged on the inner circumference of the yoke part at intervals, a stator slot is formed between two adjacent tooth parts, the plurality of stator slots comprise a plurality of first stator slots and a plurality of second stator slots, and the plurality of first stator slots and the plurality of second stator slots are arranged at intervals. The area of the first stator slot is larger than that of the second stator slot; wherein the distance between the first groove bottom and the center of the stator punching sheet is two times D1, the distance between the second groove bottom and the center of the stator punching sheet is two times D2, the groove width of each stator groove is W, the inner diameter of each tooth part is D3, D1 and D3 meet the condition that (D1-D3) / 2D3 is larger than or equal to 0.28 and smaller than or equal to 0.31, and W and D3 meet the condition that W / D3 is larger than or equal to 0.136 and smaller than or equal to 0.142. According to the technical scheme, the sizes of the stator punching sheet and the stator grooves are reasonably designed, so that the motor efficiency of the motor with the stator punching sheet is improved, the heating value of the motor is reduced, and the reliability and the stability of the motor in the operation process are improved.

The utility model provides a single line air suction type seed sowing fan, including zinc plate upper shell, fan blade, air guide wheel, motor body shell, double balanced axle, stator, rotor cover, PCB board, magnet cover, white conductor, blue conductor and yellow conductor, air guide wheel is nested in galvanized sheet upper shell inside lower end through a plurality of screws, fan blade is encapsulated between zinc plate upper shell and air guide wheel, and fan blade is fixed in double balanced axle outside upper end through fan blade flange nut and gasket, this design has solved the problem that the existing seed sowing fan often exists low efficiency, easy to block, maintenance frequently, short life etc. For example, the traditional fan motor is not high in efficiency, dust and moisture are easy to enter the bearing and cause failure, and the problems of insufficient air volume and air pressure, the single line air suction type seed sowing fan structure compact, high efficiency of the utility model design is applicable to various brand seed sowing device, has improved the reliability and economy of sowing operation.

The utility model belongs to the technical field of compressors, and particularly discloses a permanent magnet motor stator assembly of a mixed magnetic conductive material for a compressor and a refrigeration compressor. The whole permanent magnet motor stator assembly adopts a sandwich type structure, the outer layer is the stator iron core made of the silicon steel material, and the silicon steel material provides appearance support; the mounting grooves are formed in the connecting positions of the stator yoke and the stator teeth, the filling blocks in the mounting grooves are made of amorphous materials, the shape is simple, and stamping and machining are easy. In addition, packaging sheets are arranged at the two ends of the stator core, so that the amorphous material is prevented from being damaged due to external collision. According to the permanent magnet motor stator assembly of the utility model, the amorphous material and the silicon steel material are adopted as the mixed magnetic conductive material, so that the iron core loss of the tooth yoke part in the permanent magnet motor stator assembly can be reduced, and therefore, the motor efficiency can be improved, performance improvement can be ensured to the greatest extent, and the assembly can be compatible with the existing mechanical structure; and rapid use and mass production are facilitated.

The present invention discloses a large torque electric drive integrated direct drive motor, which relates to the technical field of motors, wherein the large torque electric drive integrated direct drive motor comprises: a stator, provided with a first channel; a reducer, arranged in the stator, and a second channel is arranged in the reducer; a rotor, rotatably arranged in the stator and transmission-connected with the reducer, a third channel is arranged in the rotor, and the first channel, the second channel and the third channel are connected in sequence; a driving pump, arranged in the stator, the first channel and the third channel are respectively connected to the driving pump, and the driving pump is used to drive the coolant to flow in the first channel, the second channel and the third channel; and a heat dissipation structure, arranged in the driving pump to cool the coolant in the driving pump. The present invention improves the heat dissipation capacity of the motor and improves the efficiency of the motor.

The invention discloses a winding assembly, a motor structure and an axial motor in the technical field of motors, and aims to solve the problem of complex winding processing technology in the prior art, improve the efficiency of the axial motor and reduce the noise of the motor. The motor comprises a shaft center, a base coaxially installed with the shaft center, a copper pipe installed on the base, a bearing installed in the copper pipe, a retaining ring installed in the copper pipe and used for limiting the bearing, a PCB drive board installed on the base and a winding assembly installed on the PCB drive board. The winding assembly comprises a winding insulation frame, a water-drop-shaped coil wound on the surface of the insulation frame and a conductive metal sheet used for connecting the PCB drive board and the coil. The coil in the winding assembly is connected with the external PCB through the conductive metal sheet, connection of an internal structure is achieved, the winding assembly can be machined through an automatic technology, and then all the parts form an integral assembly; and the winding assembly is connected to the part, correspondingly connected with the conductive metal sheet of the winding assembly, of the PCB driving board through an automatic gluing process.

The invention relates to an electric motor-type feedback drive (2) for a steering system, comprising a brushless electric motor (4) having a wound stator (8) and having a rotor (10), the rotor (10) having a permanent magnet rotor magnet (26), the rotor magnet (26) having a number of magnetic poles magnetized in a Halbach arrangement, and the rotor magnet (26) having a plurality of magnetic poles magnetized in a Halbach arrangement. The rotor magnet (26) is arranged in a rotor housing (24) which engages in a rotationally fixed manner with the bearing cover plate (6).

A ram air turbine system is applied to an aircraft and includes a turbine, a generator, and turbine blades. A blade insulating piece is arranged at the connecting position between the turbine blade and a shell of the turbine, and a high-resistance lining is arranged at the connecting position of the turbine blade and a gearbox or at the portion close to the connecting position of the turbine blade and the gearbox. The ram air turbine system with the structure can reduce the damage of lightning stroke to the generator, and can improve the efficiency of the generator.

The invention relates to the field of new energy automobiles, and discloses a hairpin type flat wire winding which is used for a six-layer flat wire three-phase motor with the slot number of each pole and each phase being 3, and flat wire conductors of the hairpin type flat wire winding are circularly arranged on an annular stator by a circle in a specific phase alternating and layer number distribution mode. The flat wire conductors specifically comprise six layers of first phase conductors, six layers of first phase conductors, two layers of second phase conductors, four layers of first phase conductors, six layers of second phase conductors, six layers of second phase conductors, two layers of third phase conductors, four layers of second phase conductors, six layers of third phase conductors, six layers of third phase conductors, two layers of first phase conductors and four layers of third phase conductors. Therefore, the torque ripple is reduced, and the NVH performance is improved.

A self-starting reluctance motor comprises a rotor (10), a plurality of first slots (11), a plurality of second slots (12) and a plurality of third slots (13) penetrate through the rotor (10), the first slots (11) are perpendicular to a q axis, the second slots (12) and the third slots (13) are parallel to a d axis, and the second slots (12) and the third slots (13) sequentially extend to the two ends of the first slots (11); a plurality of magnetic conductive paths (102) are formed on the rotor (10) through magnetic barrier intervals of the first open slot (11), the second open slot (12) and the third open slot (13), a trapezoidal hole (14) penetrates through a q axis of the rotor (10) on the outer periphery, an electric conductor (15) is arranged in each of the third open slot (13) and the trapezoidal hole (14), the electric conductors (15) are annularly formed on the outer periphery of the rotor (10), and a plurality of magnetic conductive paths (102) are formed on the outer periphery of the rotor (10) through magnetic barrier intervals of the first open slot (11), the second open slot (12) and the third open slot (13). And the third open slot (13) and the trapezoidal hole (14) are cut to form notch grooves (131, 141) on the surface of the rotor, and a reinforced surface layer (10A) is arranged at the outer periphery of the rotor (10) in a surrounding manner and covers the notch grooves (131, 141), so that the self-starting capability and the motor efficiency can be both realized.

The invention relates to the field of new energy automobiles, and discloses a hairpin type flat wire winding, which is used for a motor with three slots per pole per phase, and comprises a three-phase winding, a flat wire conductor of the winding is circularly arranged on an annular stator by a circle according to a specific phase alternation and layer number distribution mode, and the three-phase winding is wound on the annular stator. The cable comprises eight layers of first phase conductors, six layers of first phase conductors and two layers of second phase conductors, two layers of first phase conductors and six layers of second phase conductors, eight layers of second phase conductors, six layers of second phase conductors and two layers of third phase conductors, two layers of second phase conductors and six layers of third phase conductors, eight layers of third phase conductors, six layers of third phase conductors and two layers of first phase conductors, and two layers of third phase conductors and six layers of first phase conductors. The arrangement mode of the flat wire conductors can significantly reduce magnetomotive force harmonic waves of the winding, so that the torque pulsation of the motor is small, the operation is more stable, and the NVH performance and the motor efficiency are improved.

The application provides a rotor core and a motor with the same. The rotor core is formed with a plurality of magnetic poles which are arranged at intervals along the circumference of the rotor core. The outer periphery of the cross section of each magnetic pole comprises a plurality of arc lines and a plurality of straight lines, and the plurality of arc lines and the plurality of straight lines are arranged alternately. The air gap magnetic field between the stator core and the rotor core is optimized, the torque ripple is reduced, the motor demagnetization resistance and the motor efficiency are improved. The stator tooth is opposite to the magnetic pole and comprises a tooth body and a tooth shoe. The tooth shoe comprises two tooth shoes which are arranged at the two radial sides of the tooth body respectively. The tooth body corresponds to the first arc line, and the tooth shoe corresponds to the straight line. The magnetic field in the region between the tooth body and the first arc line is the strongest, the magnetic field in the region between the stator slot and the second arc line is the weakest, and the magnetic field in the region between the tooth shoe and the straight line is in the middle. The position and size of the straight line can be adjusted to adjust the magnetic field in the region. The motor iron loss is greatly reduced, the magnetic steel utilization rate is improved, and the motor harmonic loss is reduced.

Disclosed are a three-branch balanced winding of a six-pole, fifty-four-slot flat copper wire motor and a method. A three-branch balanced winding of a six-pole, fifty-four-slot flat copper wire motor includes a three-phase flat copper wire winding distributed symmetrically along a circumferential direction of an iron core slot. Spans of the welding end (1) are equal, and heights of the lead welding ends (1) are equal. The power lead wire end (3) is composed of four U-Pin wire types and one I-pin wire type, and a first layer of the power lead wire end (3) is composed of an I-Pin wire (4) and an U-pin wire (5) with an equal span. Both a second layer and a third layer are composed of U-pin wires (6) with an equal span. Both a fourth layer and a fifth layer are composed of U-pin wires (7) with an equal span. A sixth layer is composed of a U-pin wire (8) with an equal span.

The utility model discloses a motor, a compressor and refrigeration equipment. The motor comprises a stator assembly and a rotor assembly. The stator assembly comprises a stator iron core; the rotor assembly is rotatably arranged in the stator assembly, the rotor assembly comprises a rotor iron core and a rotor magnet, the rotor iron core is provided with a plurality of magnet grooves, the plurality of magnet grooves are arranged at intervals along the circumferential direction of the rotor iron core, each magnet groove extends in the axial direction of the rotor iron core, the outer diameter of the stator iron core is D1, the number of pole pairs of the rotor assembly is P, the number of the rotor magnets under each pole is a, the total width of the rotor magnets is L1, the length of the rotor magnets along the axial direction of the rotor core is h, the residual magnetization intensity of the rotor magnets is br, and # imgabs 0 # imgabs 1 # is satisfied. The motor provided by the utility model is small in size and large in output torque, and meanwhile, the efficiency and the power density of the motor can be improved.

The utility model provides a plug gauge tool which can be arranged in an inner circle of a stator, the plug gauge tool comprises a first tool split body, a second tool split body and a locking part, the first tool split body and the second tool split body are assembled and spliced to form a tool part, and the locking part is assembled in the tool part; the locking part has a locking state, and when the locking part is in the locking state, the locking part exerts force outwards on the tool part in the radial direction of the stator so that the tool part can abut against and be supported on the inner circumferential face of the stator. According to the utility model, in the process from sleeving the hot jacket shell on the stator to cooling, the plug gauge tool always supports the stator from the inside, so that the extrusion of the shell on the stator can be reduced, the deformation degree of an air gap between the stator and the rotor can be reduced, and finally, the motor efficiency, the torque ripple, the electromagnetic noise and the like are obviously improved.

This utility model discloses a fluid pump control box and its mounting structure with the pump body, belonging to the field of pump units. In the control box of this utility model, a mounting recess area is provided on the bottom wall of the box body, recessed towards the box cover. The mounting recess area is used for the mounting end of the pump base to fit into. The shaped wall surface of the mounting recess area forms an upwardly protruding inner boss in the inner cavity of the box body. A low mounting area is formed between the inner boss and the box cover, and a high mounting area is formed between the area outside the inner boss and the box cover. The low mounting area is used for the distribution of small-volume components on the power control board, and the high mounting area is used for the distribution of large-volume components on the power control board. This utility model breaks through the limitations of the traditional stacking mode of the control box and pump base, helping to reduce the overall size of the pump and improve space adaptability and installation convenience.

The utility model provides a rotor, a motor, a compressor and an air conditioning system. Magnetic steel grooves are formed in the rotor core, at least one magnetic steel groove comprises an installation groove, a first groove and a second groove, the first groove and the second groove are located on the two sides of the magnetic steel groove respectively in the circumferential direction of the rotor core, the first groove is located on the upstream side of the second groove in the rotation direction of the rotor core, and the permanent magnets are arranged in the installation grooves; in a cross section perpendicular to the axis of the rotor core, the area of the first groove is a first area, the area of the second groove is a second area, and the first area is larger than the second area. According to the rotor provided by the utility model, along the rotation direction of the rotor iron core, the first area of the first groove located at the upstream side is larger than the second area of the second groove located at the downstream side, so that the magnetic bridge center line between the first groove and the second groove shifts towards the rotation direction, the magnetic leakage condition is further improved, and the torque and the motor performance are improved.

The present invention discloses a multi-superconducting coil rotating pole shoe type high temperature superconducting synchronous motor excitation system in the field of superconducting motor technology, comprising: an inner stator core, the inner stator core is a cylindrical structure with a hollow axis; multiple groups of Dewar systems with built-in superconducting coils, symmetrically mounted on the outer wall of the inner stator core; multiple groups of rotor cores that can rotate along the axial direction of the inner stator core, symmetrically distributed axially around the inner stator core and the Dewar system, and a second air gap for the magnetic field to pass through exists between the rotor core and the inner stator core. The present invention can evenly divide the magnetic circuit into multiple parts along the axial direction, reduce the distance of the axial magnetic circuit of the single-loop magnetic field, make the axial magnetic field distribution more uniform, thereby reducing axial magnetic leakage; avoid the rotor cantilever being too long, making the rotor structure more solid; can further realize multiple groups of coil structures, avoid the axial length limitation of the rotating pole shoe type superconducting motor, have higher motor efficiency and power density, and be more suitable for high speed and high vibration fields.

The utility model discloses a speed regulating mechanism for a clothes dryer motor and the clothes dryer motor, the speed regulating mechanism for the clothes dryer motor comprises one or more groups of clutch speed regulating units, and the plurality of groups of clutch speed regulating units are connected in sequence; the clutch speed regulation unit comprises a sun gear and a limiting cylinder, a first fluted disc and a second fluted disc are arranged on the sun gear and the limiting cylinder respectively, the sun gear and the limiting cylinder are connected with each other through a planet gear, the two sides of the planet gear are meshed with the first fluted disc and the second fluted disc respectively, and a driving disc is connected to the exterior of the planet gear; the sun gear is used for driving the planet gear to rotate after rotation, and the limiting cylinder is used for circumferentially limiting the planet gear; and the planet gear is used for forming circumferential rotation under the control of the sun gear and the limiting cylinder and driving the driving disc to rotate. The transmission device has the characteristics of good transmission effect and high motor efficiency.

The present invention discloses a stamping progressive die for a stator and rotor core of a motor using adhesive dispensing lamination and an adhesive dispensing process, wherein the adhesive dispensing lamination device comprises a stamping station, an adhesive dispensing station for a first adhesive component, an adhesive dispensing station for a second adhesive component and a blanking station which are arranged on the stamping progressive die for the core of the stator and rotor of the motor, wherein an automatic stacking mechanism for core stamping sheets is arranged below the blanking station; one of the adhesive dispensing station for the first adhesive component and the adhesive dispensing station for the second adhesive component is located at an upper position of a material strip, and the other adhesive dispensing station is located at a lower position of the material strip; an adhesive dispensing device for a first adhesive component is arranged at the adhesive dispensing station for the first adhesive component; an adhesive dispensing device for a second adhesive component is arranged at the adhesive dispensing station for the second adhesive component; and in the first adhesive component and the second adhesive component, the adhesive of one of the components is the main adhesive and the adhesive of the other component is the catalyst. The present invention improves the quality and production efficiency of the adhesive dispensing lamination of the stator and rotor core of the motor.

This utility model relates to a booster pump motor, including a housing, an upper cover, and a bottom cover. A rotating shaft is inserted through the housing, upper cover, and bottom cover. A rotor is located in the center of the housing, and a magnet is installed outside the rotor. A control board is located at the upper end of the bottom cover. A commutator is located in the center of the control board and is axially connected to the rotating shaft. A positive brush group and a negative brush group are provided at the upper end of the control board corresponding to the outer edge of the commutator. A wire connected to the control board passes through the bottom cover. By placing the control board between the brushes and the commutator, and by setting the four brushes into two groups of positive and negative poles, and connecting the wires of the two groups of brushes to the center line area of ​​the control board, the whole machine can be stabilized, thereby improving the motor efficiency.

This invention discloses a compressor housing and a rotary compressor. The compressor housing is made of an iron-nickel austenitic alloy, the composition of which includes nickel, iron, chromium, manganese, and titanium. The microstructure of the iron-nickel austenitic alloy consists of equiaxed austenitic grains. This invention proposes a new housing material, namely, using an iron-nickel austenitic alloy to prepare the compressor housing. Compared with commonly used cold-rolled steel for housings, this iron-nickel austenitic alloy is non-magnetic, and therefore will not generate induced current with the stator core. This avoids increased iron loss and solves the problem of weak magnetic permeability in compressor housing materials, thereby improving the efficiency of the motor in the compressor.

The invention discloses a method for designing a single-phase motor stator structure assembled with magnetic slot wedges. The method comprises the following steps: determining an ideal turn ratio of q coils of a main winding in a phase belt as n1: n2... nq; according to the requirement of the maximum slot full rate, the actual total number of turns in the slot with the maximum number of turns of the main winding is determined, then the ideal number of turns of q coils of the main winding is obtained according to the ideal number of turns ratio, and the ideal number of turns is rounded off to obtain the actual number of turns N1, N2,... Nq of the q coils of the main winding; and the difference between the actual number of turns and the ideal number of turns of q coils of the main winding is calculated as delta N1, delta N2,... delta Nq, and the magnetic slot wedges are installed in the slots with the difference between the actual number of turns and the ideal number of turns being negative. In the single-phase motor, the single-phase motor is provided with the main winding and the auxiliary winding, and the magnetic slot wedge is arranged by mainly combining the difference between the actual turn ratio and the ideal turn ratio of the coil of the main winding, so that the air-gap flux density waveform of the motor tends to be sine, the amplitude of an air-gap harmonic magnetic field is reduced, the THD is reduced, and the efficiency of the motor is improved.

[Problem] To improve efficiency of a motor (1). [Solving method] A motor (1) includes a rotor (80) including a magnet (81), a stator (2) having a side surface opposing the magnet (81) in a radial direction, a substrate (50), and a resin member (60) covering the substrate (50) and the stator (2). The stator (2) includes a stator core (10), an insulating member covering the stator core (10), and a coil (30) wound around the insulating member. The resin member (60) forms the side surface of the stator (2) in the radial direction, an inner peripheral part of the insulating member is covered with the resin member (60), and thermal emissivity of the resin member (60) is smaller than thermal emissivity of the insulating member.

This utility model discloses a modular stator structure, characterized by comprising several stator core blocks arranged in an I-shape, each composed of a yoke and stator teeth, forming an integral stator core. Stator slots are formed between adjacent stator core blocks, and the stator teeth are T-shaped, with slot openings communicating with the slots between adjacent teeth. The structure also includes a filler for changing the number of stator slots without altering the stator core diameter. This utility model utilizes several stator core blocks assembled into an integral stator core, with each block composed of a yoke and stator teeth. The entire stator core is modularly assembled, which effectively improves utilization, saves silicon steel material, and reduces costs when pressing silicon steel sheets using a press.

The application provides a ring winding four-side mixed linear stepping motor. The motor comprises a primary assembly (1), an upper secondary assembly (2), a lower secondary assembly (3), a front secondary assembly (4) and a rear secondary assembly (5), all of which are salient pole structures, and the five assemblies form a "U" shaped motor structure and a four-side air gap. The motor has the advantages of high thrust density, simple structure, convenient machining and assembly, easy heat dissipation and the like.