24 results about "Magnetic barrier" patented technology

The application discloses an armature enhanced modular stator vernier permanent magnet motor, belongs to the motor field, and applies a stator magnetic barrier to the vernier permanent magnet motor as a modulation unit of an armature winding, breaks the original understanding of the magnetic barrier through a physical concept, and the stator magnetic barrier can enhance the cross-linking capacity of the armature winding to an excitation magnetic field, simultaneously enhances the magnetic motive force of multiple working armatures of the vernier permanent magnet motor, and thus increases the torque density of the motor; and a split tooth structure is adopted for the first stator tooth, the end length of the winding is shortened, and the motor volume is reduced; in addition, the magnetic barrier shape with the air gap side width being greater than the non-air gap side width can increase the first stator slot area without influencing the air gap structure, more windings are placed, and the torque density of the motor is further improved.

This invention discloses a magnetically decoupled permanent magnet motor with axial active and radial passive levitation, belonging to the field of magnetic levitation motor technology. The magnetic levitation motor includes an axial stator disk assembly, an axial stator sleeve, and a motor unit. The motor unit has a radial air gap, and an axial air gap exists between the motor unit and the axial stator sleeve. The axial air gap contains axial bias flux and axial control flux, while the radial air gap contains torque flux. The rotor's axial translational degree of freedom is actively controlled, while the four radial degrees of freedom are passively stabilized. The axial levitation force and torque are naturally decoupled and independently controlled. The rotor in the motor unit of this invention adopts a "V"-shaped alternating pole structure with built-in permanent magnets, and the rotor core has air magnetic barriers, which improves the utilization rate of permanent magnet materials and the motor's torque output capability, while reducing costs.

The application discloses a rotor, a permanent magnet synchronous reluctance motor and a vehicle, and relates to the technical field of rotor design. The rotor comprises a rotor core, and the rotor core is uniformly provided with a plurality of magnetic barrier groups in the circumferential direction; each magnetic barrier group comprises a third group of magnetic steel grooves, a second group of magnetic steel grooves and a first group of magnetic steel grooves which are sequentially and spacedly arranged along the radial direction outward. The first group of magnetic steel grooves is composed of two first magnetic steel groove rows which are symmetric about the d-axis and arranged in a V shape; each first magnetic steel groove is internally provided with a rectangular magnetic steel. The second group of magnetic steel grooves is composed of two second magnetic steel groove rows which are symmetric about the d-axis and arranged in a V shape; each second magnetic steel groove is internally provided with a rectangular magnetic steel. The third group of magnetic steel grooves is composed of two third magnetic steel groove rows which are symmetric about the d-axis and arranged in a U shape; the third magnetic steel groove is a V-shaped groove which is formed by the communication of a magnetic steel groove I section and a magnetic steel groove II section; the magnetic steel groove I section and the magnetic steel groove II section are each internally provided with a rectangular magnetic steel. The rotor of the application can increase the magnetic aggregation capacity, optimize the air gap magnetic flux density waveform, reduce the magnetic flux leakage and improve the magnetic saturation phenomenon.

This invention discloses a wafer testing box. The wafer testing box includes a first housing, a second housing, and a magnetic barrier assembly. The first housing has a first magnetic element. The second housing has a second magnetic element, which is correspondingly disposed with the first magnetic element. When the first housing and the second housing are in contact, an accommodating space is formed between them. The magnetic barrier assembly is configured to connect to the first housing or the second housing to reduce or release the magnetic attraction force generated between the first magnetic element and the second magnetic element. Before the first housing and the second housing come into contact, the magnetic barrier assembly is used to reduce or release the magnetic attraction force. When the first housing and the second housing are in contact, the effect of the magnetic barrier assembly is released, so that the first housing and the second housing are tightly bonded by magnetic attraction force. The magnetic attraction force is reduced by the magnetic barrier assembly, so that the first housing and the second housing can be separated.

This invention discloses a permanent magnet motor rotor, formed by stacking a first circular lamination and a second circular lamination. This allows the harmonic distortions generated by the two types of laminations in the rotor core to compensate for each other. The first circular lamination has six evenly spaced first magnetic slots circumferentially. Triangular magnetic barrier short slots are provided at both ends near the outer periphery of the first circular lamination. The bottom edges of the two magnetic barrier short slots are equidistant from the tangents of the first circular lamination. The central angle between the intersection of the facing waist edges and the corresponding bottom edges of the two magnetic barrier short slots and the Q-axis is A1. The second circular lamination has six evenly spaced second magnetic slots circumferentially. Long magnetic barrier slots are provided at both ends near the outer periphery of the second circular lamination. The central angle between the wedge head of each long magnetic barrier slot and the Q'-axis is B1; central angle A1 is less than B1. This rotor enables the harmonic distortions of the two types of laminations to cancel each other out, significantly reducing the overall back electromotive force distortion rate, optimizing the overall sine of the magnetic field waveform, and achieving low-vibration and low-noise operation of the motor.

The application relates to the technical field of permanent magnet motors, in particular to a saliency ratio reversible degree enhanced permanent magnet motor and a design method thereof. The permanent magnet motor comprises a rotating shaft, a rotor sleeved on the rotating shaft, and a stator coaxially sleeved on the outside of the rotor. Eight trapezoidal magnetic barriers with the centers on q axes and eight bread-type permanent magnets with the centers on d axes are staggeredly embedded in the rotor along the circumferential direction. The bread-type permanent magnets are magnetized along the thickness directions and the magnetization directions are opposite. A bulb-type magnetic barrier in contact with the bread-type permanent magnet is arranged on the two sides of each bread-type permanent magnet. The application ingeniously introduces multiple variable magnetic resistances in the rotor by changing the armature current under different working conditions, instead of a single magnetic resistance, so that the target of enhancing the saliency ratio reversibility under all working conditions is achieved while the magnetic flux leakage and the effective magnetic flux of the motor are changed, and the performance requirements of different working conditions can be met.

The invention belongs to the technical field of motor equipment, and particularly relates to a reluctance-assisted permanent magnet vernier motor. The magnetic resistance auxiliary type permanent magnet vernier motor comprises a stator structure which comprises a stator iron core with a mounting cavity, an armature winding and a plurality of first permanent magnets, and the first permanent magnets are located in a stator notch and arranged at intervals in the circumferential direction of the stator iron core; the rotor structure comprises a rotor iron core located in the mounting cavity and a rotor shaft connected with the rotor iron core, and a gap is formed between the side surface of the rotor iron core and the inner wall of the mounting cavity; the edge of the rotor core is provided with a plurality of magnetic barrier groups for generating reluctance torque, the plurality of magnetic barrier groups are arranged at intervals along the circumferential direction of the rotor core, the side surface of the rotor core is also provided with a plurality of rotor slots for generating permanent magnet torque based on a magnetic field modulation effect, and the plurality of rotor slots are also arranged at intervals along the circumferential direction of the rotor core. Through effective superposition of the permanent magnet torque and the reluctance torque, the overall torque density and the output torque of the motor are improved.

This utility model discloses an improved rotor for a permanent magnet motor, comprising a rotor core with slots for magnets and magnets inserted into the rotor core. Each slot is composed of V-shaped mounting slots that correspond one-to-one with the magnets. A magnetic barrier cavity, wedge-shaped, is connected to the outer end of each mounting slot. The inner wall areas of the wedge-shaped cavity are unequal. A distributed rotor-stator structure includes a stator and the aforementioned rotor. The stator includes a stator core with an even number of stator teeth arranged thereon. Stator slots are formed between adjacent stator teeth. Each stator tooth includes a tooth body and a tooth shoe. The surface of each tooth shoe facing the inner hole of the stator core is a concave arc surface, and the curvature of each concave arc surface is greater than the curvature of the inner hole of the stator core. This rotor improves the sinusoidal nature of the back electromotive force, reduces harmonic components, and helps reduce vibration and noise in the permanent magnet motor. The design of each tooth crown in the stator core as a concave arc reduces cogging torque and results in low output torque fluctuation.

The application discloses a motor, a compressor and a refrigeration device, wherein the motor comprises a stator and a rotor, the stator comprises a plurality of stator teeth which are arranged at intervals, and the stator teeth are provided with tooth shoes at one end of the shaft center of the stator; the rotor is provided with a plurality of mounting grooves, the mounting grooves are arranged at intervals along the circumference of the rotor, permanent magnets are mounted in the mounting grooves, the opposite ends of the mounting grooves are provided with magnetic barrier grooves, the two magnetic barrier grooves extend towards the d-axis, the included angle between the two ends of the two magnetic barrier grooves which extend towards each other and the line connecting the center of the rotor is θ1, the included angle between the opposite ends of the tooth shoes and the line connecting the center of the rotor is θ2, and |θ1-θ2|<a preset angle. The technical scheme aims to improve the utilization rate of the magnets.

The application discloses a rotor and a permanent magnet synchronous motor with the same. In the application, each magnetic barrier structure of the rotor comprises a first arc-shaped magnetic barrier layer closest to the edge of the rotor and a second magnetic barrier layer closer to the center of the rotor than the first arc-shaped magnetic barrier layer, the first arc-shaped magnetic barrier layer is provided with injection molded permanent magnets, the injection molded permanent magnets are lower in price than sintered permanent magnets, thereby reducing the cost, although the magnetic performance of the injection molded permanent magnets is weaker, however, the arc-shaped magnetic barrier layer design helps to make full use of the reluctance torque of the motor, thereby making up for the decline in the magnetic performance to a certain extent, in addition, the second magnetic barrier layer is provided with sintered permanent magnets with stronger magnetic performance, thereby ensuring that the rotor has sufficient magnetic performance to realize the desired motor performance.

A synchronous reluctance motor includes a rotor having a rotor iron core and a stator having pole teeth. The rotor iron core defines multiple magnetic poles. A magnetic barrier area is defined between adjacent magnetic poles in a circumferential direction, and a conductor area is located at a radially outer side of the magnetic barrier area. The magnetic barrier area is provided with a hole arranged in multiple layers in a radial direction and defining a magnetic barrier. The conductor area is provided with multiple conductors arranged at substantially equal intervals in the circumferential direction and having substantially identical cross-sectional shapes as each other. The following relationship is satisfied: Nc={2×[Nt / (2×Np)−1]−1}×Np where Nt is a number of the pole teeth, Np is a number of the magnetic poles, and Nc is a number of the conductors.

The utility model relates to permanent magnet motor technical field, concretely relates to a tangential permanent magnet motor rotor structure, including rotor core, rotor core includes the yoke part of setting in the center of rotor core and the multiple magnetic pole units of setting along the radial direction of rotor core evenly, the two magnetic pole units between adjacent are provided with the placement slot, the placement slot includes the main magnetic steel groove of setting away from yoke part and the vice magnetic steel groove of setting close to yoke part, the main magnetic steel groove and vice magnetic steel groove are equipped with the main magnetic steel body and vice magnetic steel body matched with it respectively in, the main magnetic steel body and vice magnetic steel body are respectively residual magnetism high body and residual magnetism low body, the width a of main magnetic steel body is less than the width c of vice magnetic steel body, the center line of magnetic pole unit is provided with main magnetic barrier, and main magnetic barrier is located in the one side of the position of main magnetic steel body and vice magnetic steel body contact, and the main magnetic steel body and vice magnetic steel body of this rotor structure adopt unequal width design and cooperate main magnetic barrier, can effectively reduce the leakage of magnetic steel, and the utilization rate of magnetic steel is promoted.

This invention belongs to the field of electric motors and discloses a harmonic-blocking alternating-pole permanent magnet hub motor and a method for differentiated vibration suppression of harmonic groups. The harmonic-blocking alternating-pole permanent magnet hub motor provided by this invention employs a harmonic trap stator and a rotor structure with local magnetic short-circuit magnetic barriers under alternating poles to actively suppress the amplitude of harmonic sources. The method for differentiated vibration suppression of harmonic groups provided by this invention is as follows: actively identifying the main vibration source under the current operating condition, extracting its dominant harmonic group characteristic frequencies as the core optimization object, employing a multi-objective optimization method to obtain the Pareto front and its solution set under each operating condition, taking the intersection of parameters under different operating conditions, selecting the parameter set with the best overall performance, classifying the basic harmonics of the vibration source as a monitoring layer, monitoring them without active compensation, and achieving differentiated and precise control. This invention overcomes the limitations of traditional methods being fixed and singular, realizing the active suppression of dynamically changing main vibration sources within the entire operating range of the alternating-pole permanent magnet hub motor.

The application discloses a calculation method of no-load performance of an interior permanent magnet motor, which comprises the following steps: obtaining motor parameters of the permanent magnet motor, wherein the motor parameters comprise a rotor initial position; calculating the radian range of a magnetic pole area and a magnetic bridge area of the rotor based on the rotor initial position; and respectively calculating the radian range of a pole slot area and a pole tooth area, wherein the pole slot area is a circumferential coincident area of the magnetic pole area and a stator slot area along a radial extension direction of the rotor, and the pole tooth area is a circumferential coincident area of the magnetic pole area and a stator tooth area along the radial extension direction of the rotor; calculating excitation magnetic flux, permanent magnet magnetic resistance, pole slot area magnetic resistance, pole tooth area magnetic resistance, magnetic barrier leakage magnetic resistance and magnetic bridge area magnetic resistance in a first pole range of the permanent magnet motor based on a lumped parameter method; and calculating air gap magnetic flux density distribution of the pole slot area, the pole tooth area and the magnetic bridge area based on a magnetic circuit method. Through the above method, the calculation efficiency of solving the air gap magnetic flux density distribution of each area is improved under the premise of ensuring the accuracy, and the complexity of designing the permanent magnet motor is simplified.

The utility model discloses a rotor of synchronous reluctance motor for compressor, including the rotor iron core that is formed by the lamination of several punching sheet, end plate and connecting assembly, and the punching sheet is circular sheet structure, and the center of the punching sheet is provided with the shaft hole of connecting shaft, and the magnetic barrier is provided around the shaft hole, and the magnetic barrier includes the first magnetic barrier of the circular arc shape from outside to inside in radial, the second magnetic barrier, the third magnetic barrier and the fourth magnetic barrier, and the end plate is provided at both ends of the rotor iron core, and the end plate and the rotor iron core are fixed through the connecting assembly, the utility model discloses the rotor iron core and the end plate are fixed through the connecting assembly, and the connecting assembly adopts the double nut structure fixed of connecting rod cooperation both ends setting, and it is convenient to assemble and gasket installation, and the weight of gasket is ingeniously used to adjust rotor dynamic balance, avoids setting the additional counterweight hole on the short board, influences the end plate strength, and increases processing steps. The magnetic bridge is arranged in the magnetic barrier, enhances the punching sheet structure, and guarantees the rotor performance simultaneously.

The application provides an energy consumption optimization control method and device of an agricultural plant protection motor, comprising: collecting agricultural plant protection motor operation parameters, plant protection operation scene parameters and load characteristic data in real time; identifying a dynamic load rate and equivalent wind resistance loss in real time through an extended Kalman filtering algorithm; adaptively adjusting equivalent magnetic resistance of a rotor magnetic circuit according to an identification result, changing air gap magnetic flux distribution through gap change of a deformable magnetic barrier structure of the motor; correcting a maximum torque current ratio control strategy based on the dynamic load rate and equivalent wind resistance loss, and dynamically distributing motor direct axis demagnetizing current and quadrature axis driving current, so that the sum of copper loss and iron loss of the motor under current working conditions is minimum. In the application, the coupling relationship between the dynamic load rate and the equivalent wind resistance loss is accurately identified, the energy efficiency of the plant protection motor is improved, and operation endurance is prolonged.

A rotor structure, an electric motor structure and a clothing treating device are provided. The rotor structure includes a rotor iron core, a permanent magnet and a magnetic barrier. The rotor iron core includes rotor punching sheets arranged in a stacked manner. Permanent magnet slots are provided in the rotor iron core and the permanent magnet is disposed in the permanent magnet slots. The rotor structure rotates in one direction or two directions in a circumferential direction. In the rotation direction of the rotor structure, the magnetic barrier is provided on at least one side of the permanent magnet slot, and two ends of the magnetic barrier face an outer edge of the permanent magnet and an outer edge of the rotor iron core, respectively. The magnetic barrier is provided on a first punching sheet or a second punching sheet of the rotor punching sheets.

The application provides a rotor structure and a motor. The rotor structure comprises a rotor core, and a plurality of layers of magnetic barriers are arranged on the rotor core. Under one pole, the magnetic barriers comprise a first magnetic barrier, a second magnetic barrier, a third magnetic barrier and a fourth magnetic barrier which are sequentially and spaced apart along a q-axis direction from outside to inside. The first magnetic barrier, the second magnetic barrier, the third magnetic barrier and the fourth magnetic barrier are all symmetrical about the q-axis. The first magnetic barrier has a first magnetic bridge between two ends and an outer circle of the rotor core. The second magnetic barrier comprises at least two first segments, and a second magnetic bridge is formed between adjacent first segments. The third magnetic barrier comprises at least two first segments, and a third magnetic bridge is formed between adjacent first segments. The fourth magnetic barrier comprises at least two second segments, and a fourth magnetic bridge is formed between adjacent second segments. According to the rotor structure, the salient pole difference of the motor can be increased, the reluctance torque of the motor can be significantly improved, the air gap flux density waveform can be optimized, the torque ripple can be reduced, and the stability and efficiency of the motor operation can be enhanced.

The utility model discloses a kind of self-starting synchronous reluctance rotor and rotor structure, rotor core is set from inside to outside center shaft hole, first magnetic barrier cavity, second magnetic barrier cavity, support rib and squirrel cage slot, first magnetic barrier cavity, second magnetic barrier cavity and support rib are distributed in d-axis two sides, first magnetic barrier cavity forms first magnetic yoke between, second magnetic yoke is formed between adjacent first magnetic barrier cavity and second magnetic barrier cavity respectively, first magnetic barrier cavity has arc winding cavity section and first straight cavity section, second magnetic barrier cavity has arc avoiding cavity section and second straight cavity section, in the squirrel cage slot that each support rib of abutting is formed H-shaped continuous conductor slot group through circumferential groove through respectively, the width between first straight cavity section is greater than the width between arc winding cavity section and center shaft hole;Second magnetic yoke of equal width is greater than the width between arc winding cavity section and center shaft hole and less than the width between first straight cavity section.The utility model rotor forming quality is good, reduces motor operating current, improves power factor and promotes motor efficiency.

This invention discloses a rotor lamination and magnet structure for an electric motor, relating to the field of motor rotor technology. It includes a rotor core body with U-shaped magnet slots and horizontally shaped magnet slots formed at equal angles within the core body. The U-shaped magnet slots are trapezoidal in shape, narrowing from wide to narrow on both sides, with a uniform-width arc-shaped structure in the middle. The U-shaped magnet slots are used to mount ferrite magnets, while the horizontally shaped magnet slots are used to mount molded neodymium iron boron magnets. This rotor lamination and magnet structure utilizes ferrite magnets, saving significant costs. It features two magnetic barrier bodies on each side of a single pole, improving motor efficiency, reducing air gap magnetic field harmonic content, increasing service life, saving costs, enhancing stability, and offering flexible design to meet the needs of various application scenarios.

A built-in permanent magnet synchronous motor rotor with optimized magnetic flux barrier, relating to the field of motor technology, is disclosed. The rotor includes a rotor core with multiple permanent magnet units symmetrically arranged around its axis. Each permanent magnet unit includes a magnet assembly, and a magnetic barrier slot assembly is provided on the outer side of the magnet assembly. The magnetic barrier slot assembly includes multiple central magnetic barrier slots, each symmetrically distributed relative to the d-axis. Magnetic barrier holes are provided on both sides of the magnetic barrier slot assembly. The central magnetic barrier slots are elongated slots parallel to the d-axis in their length direction. The rotor provided by this invention can reduce torque ripple.

The application provides a motor rotor, a self-starting synchronous reluctance motor, a compressor and a motor rotor. The motor rotor has a slit slot, a second filling slot and a first filling slot on a first rotor lamination. An outer magnetic barrier layer includes the first filling slot, and an inner magnetic barrier layer includes the slit slot and the second filling slot at both ends of the slit slot. Between the second filling slot and the slit slot in the same layer of the inner magnetic barrier layer, there is a separation rib. A side of the separation rib close to an outer circle of the rotor has a center point in an axial plane. The distance between two center points corresponding to two separation ribs in any two adjacent layers of magnetic barrier layers along a d-axis direction is L. The maximum distance between the filling slots in the two adjacent layers of magnetic barrier layers along a q-axis direction is W, and 0<=L<2W. According to the application, the saturation degree of the magnetic conduction channel between the filling slots can be reduced, the motor harmonics can be reduced, the torque ripple can be reduced, the harmonic loss can be reduced, the motor efficiency and the operation stability can be improved.

The application relates to a rotor and a motor. The rotor comprises at least one first lamination set and at least one second lamination set, the first lamination set is stacked by at least one first type lamination, the second lamination set is stacked by at least one second type lamination, the first type lamination has a plurality of first magnetic barrier structures, the first magnetic barrier structure comprises a plurality of first magnetic barrier layers, the first magnetic barrier layer comprises a plurality of first spaces and is provided with a first structure in at least one first space; the second type lamination has a plurality of second magnetic barrier structures, the second magnetic barrier structure comprises a plurality of second magnetic barrier layers, each second magnetic barrier layer comprises a plurality of second spaces and is provided with a second structure in at least one second space; when the first lamination set and the second lamination set are stacked with each other, the first structure and the second structure are arranged in a staggered mode. The rotor of the application is provided with the first and second structures staggered with each other in various laminations, so that the ability of the permanent magnet substance to resist centrifugal force is increased, and the performance of the motor is improved.