496 results about "Magnetic isolation" patented technology

The invention provides a permanent magnet motor based on permanent magnet included angle optimization and a cogging torque suppression method thereof.The permanent magnet motor comprises a stator iron core, an armature winding, rotor iron cores and permanent magnets, and each pole of rotor iron core is provided with two sets of first V-shaped permanent magnet grooves and second V-shaped permanent magnet grooves which are symmetrical about the center line of the rotor iron core and are different in size; the permanent magnets are arranged in the first V-shaped permanent magnet grooves and the second V-shaped permanent magnet grooves respectively, the permanent magnets in the first V-shaped permanent magnet grooves and the second V-shaped permanent magnet grooves are arranged in a V-V shape, the included angle between the permanent magnets in the first V-shaped permanent magnet grooves is alpha, the included angle between the permanent magnets in the second V-shaped permanent magnet grooves is beta, and the permanent magnets in the first V-shaped permanent magnet grooves and the permanent magnets in the second V-shaped permanent magnet grooves are separated by the aid of an NSGA-II algorithm under the condition that the distance of the magnetic isolation bridge is unchanged. By adjusting the angle between the permanent magnets in the first V-shaped permanent magnet grooves and the second V-shaped permanent magnet grooves, the best matching combination of the small permanent magnet included angle alpha and the large permanent magnet included angle beta is optimized, and the arc-shaped auxiliary grooves are formed in the surface of the rotor iron core, so that the cogging torque of the permanent magnet motor is optimized.

The utility model provides an insulated gate bipolar transistor driving circuit with adjustable positive and negative voltages, comprising a magnetic isolation module, the input end of which is connected with a driving signal and outputs an isolation driving signal; the input end of the first voltage regulating module is connected with the first positive voltage and outputs a second positive voltage within a first preset range; the input end of the second voltage regulating module is connected with the first negative voltage and outputs a second negative voltage within a second preset range; the push-pull output module is connected between the second positive voltage and the second negative voltage, the control end of the push-pull output module is connected with an isolation driving signal, and the output end of the push-pull output module is connected with the gate pole of the to-be-tested insulated gate bipolar transistor through a gate resistor; and the protection module is controllably connected between the output end of the push-pull output module and the second voltage regulation module under the action of the control signal. The driving circuit has the beneficial effects that the positive and negative voltage output capability can be flexibly adjusted according to debugging requirements, the working condition requirements of different clients are met, and the flexibility and adaptability of the driving circuit are improved.

The invention belongs to the technical field of permanent magnetization remanufacturing, and particularly relates to a permanent magnetization regeneration method for a waste motor of copper alloy wire processing equipment, and the method comprises the steps: disassembling a waste asynchronous motor, and reserving a case, a stator, a rotor core and a rotating shaft which are not damaged; the specifications of the air injection channels are determined according to the diameter of the rotating shaft, more than two air injection channels are arranged on the rotating shaft at equal-angle intervals, and then the rotating shaft is installed in the machine shell; the rotor core is split to obtain steel sheets, and permanent magnet grooves, magnetic isolation air grooves and air injection channel grooves are formed in the steel sheets; the permanent magnets are assembled in the permanent magnet grooves, then the steel sheets are laminated according to a first rule to obtain a rotor, and then the rotor is assembled to the rotating shaft; a rear end cover of the machine shell is removed, a heat dissipation machine cover is manufactured according to the diameter of the rear end cover, a bearing groove and an air outlet hole are formed in the heat dissipation machine cover, and then the heat dissipation machine cover is assembled to the machine shell; and a frequency converter is additionally arranged on the shell. The remanufactured permanent magnet synchronous motor manufactured by the method has better sealing performance and heat dissipation performance.

The present invention provides a rotor punching, a rotor core, a rotor, a motor, and a vehicle. The rotor punching is provided with a plurality of mounting slots for mounting permanent magnets. A pole arc region is defined between the portion of any mounting slot adapted for the permanent magnet and the outer periphery of the rotor punching. A magnetic isolation bridge is provided on both sides of any pole arc region along the circumferential direction of the rotor punching. A plurality of through holes are provided in any pole arc region, and the plurality of through holes are distributed at both ends of the pole arc region adjacent to the magnetic isolation bridge. The rotor punching provided by the present invention optimizes the rotor magnetic field distribution by providing through holes at the ends of the magnetic isolation bridges on both sides of the pole arc region, effectively weakening the quadrature-axis armature reaction, significantly improving the motor torque pulsation, and also enhancing the electromagnetic torque of the motor to a certain extent, thereby improving the motor's operating performance.

The invention relates to the technical field of new energy grid connection, in particular to a new energy grid-connected inverter system based on a double-stator synchronous motor interface, which comprises a three-phase inverter and a double-stator synchronous motor, the double-stator synchronous motor comprises a first stator, a rotor and a second stator. Planar air gaps exist between the rotor and the first stator and between the rotor and the second stator. The rotor comprises a first rotor and a second rotor which are rigidly connected, the first rotor is axially adjacent to the first stator, the second rotor is axially adjacent to the second stator, and a magnetic isolation ring is arranged between the first rotor and the second rotor; each of the first stator and the second stator comprises a stator core and an armature winding, the first rotor comprises a first rotor core, an excitation winding and a starting winding, and the second rotor comprises a second rotor core and a permanent magnet. According to the invention, the double-stator configuration can realize voltage transformation and frequency conversion functions, and can solve the problems of reduced power grid inertia, insufficient short-circuit capacity, aggravated broadband oscillation risk and the like caused by grid connection of large-scale new energy through power electronic equipment.

The pressure release valve comprises a shell and a fixing sleeve arranged on the shell, an installation cavity is formed in the shell, an electromagnetic coil assembly is arranged in the installation cavity, the magnetic isolation sleeve is inserted in the installation cavity, the magnetic isolation sleeve is connected between the shell and the fixing sleeve in an abutting mode and isolates the installation cavity, and the electromagnetic coil assembly is arranged in the magnetic isolation sleeve. A movable valve element is arranged on the magnetism isolating sleeve in a sliding mode, and the end of the movable valve element is connected with a sealing piece.

The invention discloses a double-stator permanent magnet motor structure, and relates to the technical field of motors. One end of the inner stator shaft is fixed on the motor rear end cover, the other end of the inner stator shaft is suspended, and the motor rear end cover is connected with the casing; the inner stator bracket is fixed on the inner stator shaft; the inner rotor iron core and the outer rotor iron core are respectively fixed on the inner ring and the outer ring of the magnetism isolating ring, and the two ends of the magnetism isolating ring are supported and fixed through the rotor front end cover and the rotor rear end cover; the double-row cylindrical roller bearing is radially arranged between the rotor rear end cover and the inner stator shaft; the cylindrical roller bearing is radially arranged between the rotor front end cover and the motor front end cover, and the motor front end cover is connected with the shell; the deep groove ball bearing is axially arranged between the rotor front end cover and the inner stator shaft; the outer stator iron core is pressed into the heated and expanded casing; and the inner stator iron core is thermally sleeved on the inner stator bracket. Through configuration and arrangement of the three bearings, oil injection and discharge positions are all located outside the motor, the working temperature of the bearings is effectively reduced, and the service life is prolonged.

The invention discloses a composite voltage generation device and a cable insulation performance evaluation system and method, and relates to the technical field of high-voltage insulation testing. The composite voltage generating device comprises a synchronous controller, a direct current source, an impact source, an IGBT active protection unit and a magnetic isolation coupler, and by means of the excellent characteristics of the IGBT and the magnetic isolation coupler, the superposition time sequence accuracy of direct current and impact voltage is improved, and waveform distortion is reduced. The IGBT active protection unit comprises a first IGBT and a second IGBT, and direct-current voltage polarity switching can be realized through selective conduction of the IGBTs; the RC circuit is connected in parallel between the collector electrode of the first IGBT and the emitter electrode of the second IGBT, reverse current flowing back to the direct current source direction can be discharged through the RC circuit, the risk of energy flowing back is reduced, meanwhile, the magnetic isolation coupler can completely block direct current, and an impact source is protected against the influence of direct current voltage; according to the invention, the authenticity and reliability of cable insulation performance evaluation can be effectively improved.

The invention discloses a double-frequency phase independent regulation and control metasurface unit and an application method. The metasurface unit comprises a dielectric substrate; the two sides of the dielectric substrate are covered with a first metal layer and a second metal layer respectively. Each of the first metal layer and the second metal layer comprises a metal patch main body and a phase regulation and control structure, the center of the metal patch main body is provided with a circular hollow, and the phase regulation and control structure is arranged in the circular hollow; the phase regulation and control structure of the first metal layer and the phase regulation and control structure of the second metal layer are in 180-degree rotational symmetry; the double-connecting-ring structure is an axisymmetric structure; an open circular split ring resonator is arranged in the double-connecting-ring structure, and an electromagnetic isolating ring group is arranged in the open circular split ring resonator; according to the invention, 360-degree independent phase control on electromagnetic waves at a low-frequency band and a high-frequency band is realized.

The invention relates to a rotor structure suitable for improving weak magnetic speed expansion capability of a disc type motor, a rotor core is embedded in a groove of a rotor support disc, composite magnetic poles are uniformly distributed and attached to the surface of the rotor core, a magnetic isolation support and the rotor support disc are fixed together, and the composite magnetic poles are embedded in mounting grooves of the magnetic isolation support. The composite magnetic poles are composed of permanent magnets, parallel magnetic poles and series magnetic poles, the series magnetic poles are attached to the surfaces of the permanent magnets in the axial direction to form series parts of the magnetic poles, the series parts of the parallel magnetic poles and the series parts of the magnetic poles are arranged in parallel in a one-to-one correspondence mode in the radial direction, and the series parts of the parallel magnetic poles and the series parts of the magnetic poles form parallel parts of the magnetic poles. Compared with a surface-mounted disc type motor, the direct-axis inductance of the motor is obviously improved; and compared with a disc type motor with parallel combined magnetic poles, the output power is higher in the same speed expansion range. When the motor is used for a disc type motor, the disc type motor has a wide flux-weakening speed regulation range, and the loading capacity of the motor at a low speed is improved.

The invention relates to a low-harmonic permanent magnet synchronous motor rotor punching sheet and a motor rotor, and relates to the technical field of permanent magnet synchronous motors. According to the scheme, the rotor punching sheet is provided with the first magnetic steel groove and the second magnetic steel groove which form a V shape and are symmetrical about the D axis of the motor rotor, and the opening of the V shape faces the outer circumferential wall of the rotor punching sheet body. According to the structure, the distribution of a motor rotor magnetic field is improved, the magnetic field is more uniform, the salient pole rate is higher, the weak magnetic speed expansion capability is stronger, the structural strength is better, the harmonic content is lower, and the sine property of the magnetic field can be improved. On the outer circumferential wall of the rotor punching sheet body, a first auxiliary groove is formed between the first magnetic isolation bridge and the second magnetic isolation bridge and close to the first magnetic isolation bridge, and a second auxiliary groove is formed between the second magnetic isolation bridge and the D shaft and close to the second magnetic isolation bridge. On the premise of ensuring the mechanical strength of the magnetic isolation bridge, the magnetic line direction is changed, the magnetic leakage is reduced, the air gap flux density waveform is improved, the harmonic content is reduced, and the torque ripple and electromagnetic noise are reduced.

The present invention discloses a stator core assembly, a stator, and a motor, wherein the stator core assembly includes a core component and a plurality of independent insulating frames, the core component includes a plurality of cores arranged in sequence, two adjacent cores are connected by a magnetic isolation bridge, and the insulating frames correspond to the cores one by one; wherein the core includes a connected yoke, a tooth portion, and a boot portion, the yoke and the boot portion are arranged at both ends of the tooth portion, the insulating frame is provided with a through-hole, and the tooth portion is installed in the through-hole. The plurality of cores of the core component are connected in sequence by magnetic isolation bridges, and the magnetic isolation bridges are used to reduce the amount of magnetic leakage, which is beneficial to improving the efficiency of electromagnetic energy conversion and improving the performance of the motor; moreover, the teeth of the core are installed in the through-hole of the insulating frame, and each independent insulating frame is fixed to the core component, so the structure is stable and reliable.

The invention provides a rotor assembly and a servo motor. The rotor assembly comprises a rotor iron core, permanent magnets and an irradiation light source, the multiple permanent magnets are arranged at intervals in the circumferential direction of the rotor iron core, the rotor iron core is provided with a magnetic isolation gap and an installation groove which are communicated with each other, the installation groove penetrates through at least one end of the rotor iron core in the axial direction, and the magnetic isolation gap is formed between every two adjacent permanent magnets in the radial direction; the installation groove is internally provided with a photosensitive telescopic piece, one end, close to the central axis of the rotor core, of the photosensitive telescopic piece is fixedly connected with the groove wall of the installation groove, and one end, far away from the central axis of the rotor core, of the photosensitive telescopic piece is fixedly connected with the magnetic conduction slip sheet. The irradiation light source is used for irradiating the photosensitive telescopic piece to adjust the telescopic length of the photosensitive telescopic piece. According to the rotor assembly and the servo motor, accurate field weakening control can be achieved, and the rotating speed range of the servo motor is widened.

The utility model provides an automatic collection structure and recovery equipment, the automatic collection structure is used for collecting magnetic identification sheets adsorbed on the surface of an object to be detected, and the automatic collection structure comprises a movable seat, and a guide plate, a guide seat and a driving device which are respectively arranged on the same side surface of the movable seat; the guide plate forms a collection channel of the magnetic recognition sheets, the width of the collection channel is gradually reduced from the inlet to the outlet, and the outlet of the collection channel is connected with the inlet of the guide seat; a collecting position is arranged at the end, away from the guide plate, of the guide seat, a driving device and a collecting box are arranged on the two opposite sides of the collecting position respectively, and the driving device is used for pushing the magnetic recognition pieces located on the collecting position into the collecting box so that the magnetic recognition pieces can be separated from the surface of the to-be-detected object, and therefore the magnetic recognition pieces are collected in the collecting box; and the movable seat, the guide plate, the guide seat and the driving end of the driving device are all made of magnetic isolation materials. The automatic collection structure and the recovery equipment provided by the utility model are simple in structure, low in cost and capable of efficiently recovering the magnetic identification sheets.

The invention discloses a subminiature three-coaxial differential self-locking high-temperature-resistant assembly and a connector, and relates to the technical field of radio frequency connectors, the subminiature three-coaxial differential self-locking high-temperature-resistant assembly comprises a shell, an outer shield is arranged in the shell, an outer insulator is arranged on the inner side of the outer shield, and an inner shield is arranged on the inner side of the outer insulator. According to the subminiature three-coaxial differential self-locking high-temperature-resistant assembly and the connector, efficient electromagnetic isolation is formed by the double shielding layers composed of the outer shielding layer and the inner shielding layer and the inner conductor, radio frequency leakage and signal crosstalk can be remarkably inhibited through cooperative use of the structures, the problem that a traditional double-coaxial structure is insufficient in shielding is solved, and meanwhile, the connector is high in reliability. The inner shielding layer and the outer shielding layer of the twisted pair are respectively welded with the inner shielding layer and the outer shielding layer, the continuity of the shielding effect is ensured, the connecting seat is made by sintering glass powder and is provided with a conductive silver powder sealing ring, the stability at high temperature is ensured, good grounding continuity is also provided, and the overall electromagnetic compatibility performance is further enhanced.

The utility model relates to a motor rotor structure and a driving motor, and relates to the technical field of driving devices. A motor rotor structure comprises a rotor body and a plurality of first magnets, the rotor body is provided with a plurality of first fixing grooves in the radial direction, the first fixing grooves are evenly arranged at intervals in the circumferential direction of the rotor body, the first magnets are clamped in the fixing grooves in a one-to-one correspondence mode, and a first magnetic isolation bridge is arranged between every two adjacent first fixing grooves. The first magnetic isolation bridge is located at one end of the first fixing groove close to the central axis of the rotor body. According to the motor rotor structure, the first magnets are radially arranged along the rotor body section, the utilization rate of the first magnets is improved, the magnet consumption is reduced, and the cost is reduced. Meanwhile, one end, close to the center of the rotor body, of each first fixing groove is provided with a first magnetic isolation bridge, the space is fully utilized to optimize the structure of the rotor body, the utilization rate of the permanent magnets is ensured, and the performance and efficiency of the motor are further improved.

The utility model provides a spring needle magnetism isolating connecting device and a glove knitting machine, and belongs to the technical field of knitting machinery. The spring needle magnetism isolating connecting device comprises a spring needle body, a magnetism isolating piece and an attraction piece. One end of the magnetic isolation piece is fixedly connected to the spring needle body, the other end of the magnetic isolation piece is fixedly connected to the attraction piece, the attraction piece can be magnetically attracted to the magnetic bar of the needle selector, and therefore attraction of the spring needle body is completed, the magnetic isolation piece isolates magnetic force emitted by the magnetic bar of the needle selector from the spring needle, and the attraction piece is demagnetized when the spring needle body needs to be loosened. The residual magnetic force of the attraction piece is smaller than the first preset value, the attraction piece cannot affect the spring needle body, the spring needle body can be quickly loosened, the structure is simple, and operation is easy and convenient.

The invention relates to the technical field of hot melt adhesives, in particular to automatic production and processing equipment for hot melt adhesives. According to the technical scheme, the reaction kettle comprises a reaction kettle body and a heat dissipation mechanism, the heat dissipation mechanism comprises a heat insulation bin, a heat dissipation pipe is fixedly installed in the heat insulation bin, the heat dissipation pipe is spirally distributed around the inner wall of the reaction kettle body, and a flow valve installed in the heat insulation bin is fixedly installed on the heat dissipation pipe. In winter, the bimetal coil reed is wound under the influence of the environment temperature, the bimetal coil reed enables the magnetic isolation baffle to move through the extension strip and the avoiding frame, so that the shielding area of the magnetic isolation baffle to the magnet and the metal toothed plate is reduced, and the larger the magnetic force borne by the metal toothed plate is, the larger the magnetic force borne by the metal toothed plate is, the better the magnetic force is. The metal toothed plate slides to enable the adjusting gear to rotate to adjust the flowing speed at the flow valve, so that the flowing speed in the radiating pipe is reduced, namely the cold water heat exchange efficiency is reduced, and the situation that the internal temperature of the reaction kettle body is lower than the temperature required by reaction due to the fact that the radiating efficiency is influenced by the environment temperature is avoided.

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 utility model discloses a motor magnetism isolating baffle with a quick installation function, which belongs to the technical field of motors and comprises a baffle body, a rotating shaft hole and an installation mechanism, the rotating shaft hole is arranged at the center of the outer wall of the baffle body, and the installation mechanism comprises an annular positioning plate which is sleeved on the outer surface of the baffle body. An annular mounting plate is fixedly connected to the outer wall of the annular positioning plate, a plurality of mounting holes are formed in the outer wall of the annular mounting plate at equal intervals, the baffle body is a motor magnetic isolation baffle, a rotating shaft hole is used for penetrating of a rotating shaft, and the annular mounting plate is conveniently mounted on a motor stator end plate through the mounting holes; and the baffle body is conveniently positioned through the annular positioning plate on the annular mounting plate, so that the baffle body is mounted and fixed, the baffle body is prevented from being directly fixed through bolts, and the mounting convenience and the use safety of the baffle body are improved.

The application discloses a tangential rotor lamination and a rotor structure, and relates to the technical field of permanent magnet motors. The rotor lamination comprises a magnetic isolation hole, which is arranged on a lamination body and has an opening at the bottom; a stainless steel key is arranged in the magnetic isolation hole and above the opening; a first magnetic isolation bridge is arranged on both sides of the magnetic isolation hole and has a structure of being wide at the top and narrow at the bottom; a second magnetic isolation bridge is arranged on both sides of the magnetic isolation hole and connected with the bottom of the corresponding first magnetic isolation bridge, and the cross section of the second magnetic isolation bridge is in a strip shape; a third magnetic isolation bridge is arranged on both sides of the magnetic isolation hole and connected with the bottom of the corresponding second magnetic isolation bridge, and the cross section of the third magnetic isolation bridge is in a strip shape; and a bearing table extending outward is formed between the second magnetic isolation bridge and the third magnetic isolation bridge. In combination with reasonable size design of the magnetic isolation hole and the surrounding structure, the magnetic resistance of the key region is increased and the magnetic circuit distribution is optimized according to the magnetic resistance regulation principle, the magnetic flux passing through the air closed is significantly reduced, and the inter-pole leakage magnetic is greatly reduced.

The utility model provides a rotor and a motor, and belongs to the technical field of motors. Wherein the rotor comprises an iron core and a permanent magnet, a plurality of slotted hole groups are annularly distributed on the iron core at intervals, each slotted hole group comprises at least one slotted hole, the slotted holes penetrate through the iron core along the axial direction, the end part of at least one slotted hole in each slotted hole group extends to the periphery of the iron core, and a polymer coating layer is arranged on the periphery of the iron core; the number of the permanent magnets is multiple, and the multiple permanent magnets are correspondingly arranged in the slotted holes. According to the utility model, no magnetic isolation bridge is arranged at the periphery of the rotor, so that the problem of magnetic leakage can be reduced, and the permanent magnetic flux of the rotor can be improved. The polymer coating layer can reduce the problem that the permanent magnets are thrown out at a high rotating speed, and compared with a carbon fiber coating sleeve arranged on the periphery of the rotor, the polymer coating layer can reduce the cost. Therefore, the magnetic flux leakage problem can be improved on the basis of reducing the cost, the torque of the motor is improved, and the power density of the motor is increased.

The present application relates to the technical field of flow control valve, and belongs to a flow control valve without magnetic isolation ring, which comprises a valve body assembly, a fluid passage and a control assembly for controlling the opening and closing of the fluid passage are arranged in the valve body assembly, the fluid passage is arranged in a rotary manner, the control assembly is located at the rotary part of the fluid passage, the control assembly comprises a stop iron, the stop iron is connected to the valve body assembly, a groove structure is arranged on the outside of the stop iron, and a fourth blind hole and a fifth blind hole arranged in a stepped manner are arranged on the inside of the stop iron. Based on the unique electromagnetic structure of the stop iron, the magnetic circuit breaker structure is integrated, and the magnetic circuit structure is optimized. The magnetic field strength at the air gap of the electromagnetic valve is improved to obtain greater electromagnetic force; the lightweight structure design of the electromagnetic valve can obtain faster response speed under the driving of greater electromagnetic force.

The application relates to the motor technical field, in particular to a unit complementary type magnetic flux reverse rotation linear motor, which comprises a rotor assembly and a stator assembly, and an air gap is formed between the stator assembly and the rotor assembly; the rotor assembly comprises a plurality of rotors which are arranged in a stacked mode along an axial direction, the outer periphery of each rotor is uniformly distributed with a plurality of salient pole teeth, and the salient pole teeth of two adjacent rotors are arranged in a staggered mode; the stator assembly comprises a plurality of annular stator units which are arranged in the axial direction, and two adjacent stator units are arranged in a staggered mode; and each stator unit comprises a magnetic isolation block, a stator core assembly, a permanent magnet and an armature coil. The application realizes natural decoupling of rotation and linear freedom, can reduce manufacturing difficulty and simplify control strategy while ensuring high torque density and high thrust density.

The utility model discloses a miniature clutch device based on magnetic circuit control, which comprises an input end coil, an output end coil, a rotating piece, a hard magnetic clutch sliding block, a clutch connector and a self-locking piece, the clutch connector is provided with a joint groove, and the self-locking piece comprises a permanent magnet piece and a locking piece used for magnetic isolation. A mounting groove communicated with the joint groove is formed in the circumferential groove wall in the joint groove, the locking piece is movably assembled in the mounting groove, and the output end coil is sequentially electrified to form two magnetic fields in opposite directions to be respectively applied to the permanent magnet piece; the hard magnetic clutch sliding block is driven to be switched between a separation position where the hard magnetic clutch sliding block is prevented from being connected with the connecting groove and a connecting position where the hard magnetic clutch sliding block is allowed to be connected with the connecting groove, and at least a magnetic field formed by electrifying the input end coil is applied to the hard magnetic clutch sliding block, so that the hard magnetic clutch sliding block extends out when the locking piece is switched to the connecting position; in this way, the clutch function is achieved through electromagnetic interaction, the working current is small, and the electromagnetic clutch is applied to the harsh environment.

A rotor punching sheet structure disclosed by the present invention comprises a support sheet and a magnetic conductive ring, the magnetic conductive ring surrounds the support sheet, the magnetic conductive ring is provided with a plurality of magnet installation grooves, the magnet installation grooves are internally provided with magnet installation structures, and the plurality of magnet installation structures are circumferentially and uniformly distributed by taking the support sheet as a center. The magnet mounting structure comprises a magnetic conduction strip, a first permanent magnet, two second permanent magnets and two magnetic isolation strips, the first permanent magnet is clamped with the side, away from the supporting piece, of the magnetic conduction strip, the second permanent magnets are located on the side, close to the supporting piece, of the first permanent magnet, and the magnetic isolation strips are clamped with the magnetic conduction ring and the magnetic conduction strip. The supporting piece is provided with a plurality of magnetic isolation protruding parts. The beneficial effects of the invention are that the magnetic flux leakage can be effectively reduced, the clamping with the magnetic conductive ring and the magnet installation structure in the circumferential direction can be ensured, the functions of optimizing the magnetic flux path and supporting the structure can be realized, and the motor has important significance for improving the working performance of the motor.

This application relates to the field of automotive radar technology, disclosing an antenna array and an automotive radar. The antenna array includes a substrate, an electromagnetic isolation structure, and a feeding assembly. The substrate is provided with a transmitting part and a receiving part. The transmitting part includes multiple transmitting radiating elements arranged to form a transmitting radiating array. The receiving part includes multiple receiving radiating elements arranged to form a receiving radiating array. The electromagnetic isolation structure is disposed between adjacent radiating elements to suppress electromagnetic coupling between the radiating elements. The feeding assembly is disposed on the substrate and is connected to both the transmitting radiating array and the receiving radiating array. Through the above method, this application embodiment can block the coupling path of electromagnetic waves, thereby improving the overall isolation of the array.

The invention particularly relates to a cable line fault detecting and positioning system for an intelligent power distribution network ring main unit, and relates to the technical field of intelligent power distribution network fault detection. A multi-dimensional feature extraction and intelligent diagnosis module; a health state evaluation module; and a self-adaptive calibration compensation and control module. According to the invention, a passive acquisition mode is combined with steady-state conventional monitoring and transient double-trigger high-speed recording, so that hard fault related data can be accurately captured; the active test mode automatically injects a standard signal at a power grid load trough, flexibly captures soft degradation characteristics such as element aging and parameter drift, and the magnetic isolation design avoids interference to the power grid.

A first blind hole, a second blind hole and a third blind hole are formed in a valve body in the axial direction, a plurality of first through holes are evenly formed in the side wall of the second blind hole, a valve element is installed in the second blind hole in an axial moving mode, and a plurality of second through holes are evenly formed in the side wall of the third blind hole. A first pressure guiding hole, a second pressure guiding hole and a fourth blind hole are sequentially formed in the yoke, the stop iron is fixedly arranged in the yoke through the mounting plate, a second through hole and a fifth blind hole are formed in the stop iron, a magnetic circuit optimization structure is arranged on the outer surface of the stop iron, the armature is arranged in the fifth blind hole, and a film is arranged between the armature and the inner wall of the fifth blind hole. The ejector rod penetrates through the second through hole, the valve seat is assembled in the third blind hole in a sealed mode, and a spring is connected between the side wall of the fourth blind hole and the valve seat. Through the design of a non-magnetic-isolation-ring magnetic circuit and the variable spring, efficient driving, reliable sealing and switch and proportion control integration of the electromagnetic valve are achieved, the structure is compact, and adaptability is high.

A camera compact system includes a shape memory alloy (SMA) motor, a lens array, a plurality of magnetic isolation members, and an image sensor, where the SMA motor is configured to move the lens array; and each of the magnetic isolation members is located between the SMA motor and the image sensor to reduce a degree of magnetic interference to a magnetic sensitive electronic component in the camera compact system.