30results about How to "Optimized magnetic circuit" patented technology

The invention provides a rotor structure, a permanent magnet auxiliary synchronous reluctance motor and an electric vehicle. The rotor structure includes a rotor body. A permanent magnet slot group isdisposed on the rotor body. The permanent magnet slot group includes a plurality of permanent magnet slots. The multilayer permanent magnet slot includes a first permanent magnet slot. The first permanent magnet slot includes a first permanent magnet slot segment and a first hinge slot. The first end of the first chamfer is in communication with the second end of the first permanent magnet slot segment. A second end of the first chamfer extends toward an outer edge of the rotor body. A distance from a midpoint of the second end of the first chamfer adjacent the outer edge of the rotor body toa point at which the geometric centerline of the first permanent magnet slot intersects the outer edge of the rotor body is A. The width of the end of the second end of the first permanent magnet slot segment is M, where 0.6 M <=A. This arrangement optimizes the magnetic circuit of the rotor structure, so that the overall anti-demagnetization capability of the rotor structure is effectively improved, and the motor efficiency of the rotor structure with the structure is improved.

The invention discloses a motor external stator with adjustable inner diameter, which is characterized in that the stator core is formed by superposing a plurality of annular stator core stampings with integral structures; tooth sheets of the stator core stampings are correspondingly superposed to form unit tooth blocks of the stator core; a connected body of the stator core stampings are correspondingly superposed to form a connecting part among the unit tooth blocks; a major yoke part of the stator core is formed on the tooth root part of the unit tooth blocks; a secondary yoke part of the stator core is formed by bending the connecting part into ear shape; and the peripheral surface of the stator core is in close fit with a strap to form the whole structure of the motor external stator. According to the motor external stator with adjustable inner diameter, the winding difficulty is reduced; the diameter of the motor stator can be changed by controlling the contraction degree of the stator core by changing the inner diameter of the strap and the size of cushion block so as to be suitable for the rotors with different diameters, and the production cost of the motor is greatly reduced.

The invention provides a motor rotor structure which is provided with magnetic steel slots. Magnetic isolating holes are arranged on outer sides of the magnetic steel slots. A magnetic field can be affected by the magnetic isolating holes to be distributed according to a certain law, and is optimized, accordingly, high-order harmonic waves, such as fifth-order harmonic waves and seventh-order harmonic waves, are effectively reduced, and the waveform of counter electromotive force is sinusoidal effectively. The invention further provides a permanent-magnet synchronous motor and a frequency-variable compressor. A rotor of the permanent-magnet synchronous motor or the frequency-variable compressor is of the motor rotor structure. The motor rotor structure, the permanent-magnet synchronous motor and the variable-frequency compressor have the advantages that the proper magnetic isolating holes are arranged, so that the high-order harmonic waves can be effectively reduced, a magnetic circuit is optimized, the waveform of the counter electromotive force is sinusoidal effectively, the efficiency of the motor is effectively improved, and noise is effectively reduced.

The invention discloses a microstrip circulator, which can be used in isolators and microwave communications, especially in T / R components. The microstrip circulator is provided with a second substrate on the upper surface of the substrate by adding a substrate. A grounding metal layer, the lower surface of which is provided with a soldering area electrically connected to the first grounding metal layer and used for surface mounting, and a plurality of avoidance parts are provided on the substrate; and the central conductor of the microstrip circulator The plurality of connection parts correspond to the plurality of connection ends provided on the lower surface of the gyromagnetic layer and are electrically connected; the gyromagnetic layer is arranged on the substrate, and the first ground metal layer and the second ground metal layer are electrically connected. Sexual connection, at the same time, the welding end corresponds to the avoidance part one by one and passes through the corresponding avoidance part, as a soldering part of the surface mount. Therefore, the present invention can not only achieve surface mounting with an external circuit through the substrate, but also reduce the impact of external force on the gyromagnet through the substrate.

The invention provides a rotor structure, a permanent magnet assisted synchronous reluctance motor and an electric vehicle. The rotor structure includes a rotor body. The rotor body is provided with an inner permanent magnet slot and an outer permanent magnet slot. The inner permanent magnet slot and the outer permanent magnet slot A magnetic conduction channel is formed between the permanent magnet slots of the layer, the cross section of the inner permanent magnet slot along the radial direction of the rotor body is U-shaped, and the outer permanent magnet slot along the radial direction of the rotor body is V-shaped. structure. Such arrangement can effectively utilize the material of the rotor body, and at the same time optimize the magnetic circuit of the rotor body. The material utilization rate of the rotor is effectively improved, and the efficiency of the motor with the rotor structure is effectively improved at the same time.

The invention discloses a piston type testing device for the squeezing flow dynamic characteristics of magnetorheological fluid. The testing device comprises an upper flange plate 1, an upper end cover 2, an upper connecting bolt 3, an upper piston rod 4, a piston 5, a lower piston rod 6, a locating sleeve 7, a magnet exciting coil 8, a lower end cover 9, a lower connecting bolt 10, a lower flange plate 11 and a plurality of sealing rings. The fluid to be tested is contained in an airtight working cavity A formed by the upper end cover 2, the lower end cover 9 and the locating sleeve 7. The piston 5 is clamped by the shaft shoulder of the upper piston rod 4 and the shaft shoulder of the lower piston rod 6 and arranged in the working cavity A, and the upper piston rod 4 and the lower piston rod 6 move vertically to drive the piston 5 to squeeze the fluid to be tested in the working cavity A. The testing device is used for testing the squeezing flow dynamic characteristics of the magnetorheological fluid in a quasi-static state, a dynamic state and particularly a high-frequency vibrating state.

The invention discloses a motor inner stator with adjustable outer diameter, which is characterized in that a stator iron core is formed by overlapping a plurality of stator iron core stamping pieces in annular integral structures, tooth pieces of the stator iron core stamping pieces are correspondingly overlapped to form unit tooth blocks of the stator iron core, connecting bodies of the stator iron core stamping pieces are correspondingly overlapped to form connecting parts among the unit tooth blocks, the tooth root part of each unit tooth block forms a main yoke part of the stator iron core, each connecting part is bent towards the circle center of the stator iron core and is in an ear shape so as to form a secondary yoke part, the edge of a stator bracket corresponds to the tooth root of each unit tooth block and forms a through slot with each connecting part, a plurality of limiting supporting bosses are arranged at the through slots, and the through slots and the stator iron core are buckled into a whole by using the limiting supporting bosses. According to the inner stator, the coiling difficulty is reduced, the diameter of the motor stator is changed by controlling the degree of shrinking and combining degrees of the stator iron core under a condition that the motor stator iron core stamping piece mold is not changed, and only the size of the brocket is changed, thereby being adapted to stators with different diameters and greatly reducing the production cost of a motor.

The invention discloses a microstrip circulator, which can be applied to isolators and microwave communications, especially in T / R components. The microstrip circulator adds a substrate, and the upper surface of the substrate is provided with The first ground metal layer and a plurality of signal terminals, the lower surface of the substrate is provided with a plurality of welding areas that are electrically connected to the first ground metal layer and each signal terminal respectively; and the central conductor of the microstrip circulator The plurality of connection parts of the gyromagnetic layer respectively correspond to the plurality of connection ends provided on the lower surface of the gyromagnetic layer and are electrically connected; the gyromagnetic layer is arranged on the substrate, so that the lower surface of the gyromagnetic layer is connected to the upper surface of the substrate They are disposed face to face, and at the same time, the first ground metal layer is electrically connected to the second ground metal layer, and the connection terminals correspond to the signal terminals one by one and are electrically connected. Therefore, the present invention can not only achieve surface mounting with an external circuit through the substrate, but also reduce the impact of external force on the gyromagnet through the substrate.

A double stator and double wire coil electromagnetic liquid-cooled retarder is disclosed and belongs to the field of non-contact automobile braking. A most important characteristic of an eddy current retarder is non-contact braking which is high in responding performance and good in low speed braking effects, automobile braking performance is improved, fast brake pad and tire consumption caused due to friction in traditional braking processes can be prevented, braking noise can be eliminated, and environment pollution can be prevented; driving safety, comfort and economical performance of vehicles can be greatly improved; driver fatigue and emergent braking can be reduced; working efficiency can be improved; driving smoothness can be realized. The double stator and double wire coil electromagnetic liquid-cooled retarder works as an automobile auxiliary braking device; a disk rotor, a double stator and double wire coil structure, a design of arranged the wire coils at a center, and a structure of reasonably integrating stators and water channels are adopted in an innovative manner; axial dimensions of the electromagnetic retarder is effectively reduced, a heat radiating system is optimized, electromagnetic retarder heat fading phenomena are inhibited, overall braking torque is greatly improved, and braking effects are increased.