912 results about "Magnetic isolation" patented technology

The invention provides a permanent magnet motor and a variable-frequency scroll compressor, and relates to the technical field of scroll compressor design and manufacturing, and the permanent magnet motor comprises a stator iron core and a rotor iron core; the stator iron core comprises stator slots which are uniformly distributed along the circumference, copper windings are embedded in the slots, stator yokes which are uniformly distributed are arranged outside the bottom of each slot, each stator yoke is provided with an arc-shaped long slot, stator teeth are arranged between every two adjacent stator slots, and the tops of the stator teeth are sunken to form through-flow slots; the rotor core is internally provided with magnetic steel grooves which are uniformly distributed, two same first magnetic isolation grooves are arranged between two adjacent magnetic steel grooves, magnetic steel is arranged in the magnetic steel grooves, and the top of each magnetic steel is provided with two second magnetic isolation grooves which are symmetrically distributed. The outer side radius Rs1 of the stator core, the inner side radius Rs2 of the stator core and the axial length Lis of the stator core meet the following conditions: 1.282 < = Lis / (Rs1-Rs2) < = 2.778, and 34 < = Rs1-Rs2 < = 39 mm. The power density of the motor can be increased, the cost is reduced, the efficiency is improved, and the harmonic content is reduced so as to suppress torque ripple.

The invention discloses a box-type energy storage substation operation control method and system, a product and a medium. The method comprises the following steps: collecting gas concentration data in the box-type energy storage substation, comparing the gas concentration data with a preset threshold value, and judging whether gas leakage exists or not; if yes, recording related data, and detecting an insulation resistance value of the electrical contact component; based on the gas concentration data and the leakage time of the leakage area, judging whether a chemical reaction triggering condition is met or not; if yes, inert gas is sprayed to the leakage area; if the insulation resistance value is lower than a safety threshold value, electromagnetic isolation is carried out on the leakage area, and distribution of the electric load to the related energy storage unit is stopped; then, current is applied to the electrical contact component at a preset frequency, and an insulating property value is detected; when the insulating property is restored to within the safe range, the electrical load is redistributed to the leakage region. By implementing the technical scheme, the safety of the fault area after the insulation performance is reduced due to gas leakage in the operation process of the box-type energy storage substation is improved.

The invention discloses an oil-cooled motor rotor cooling structure, which is characterized in that a motor shaft comprises a hollow axial motor shaft inner cavity main oil way, a motor shaft excircle axial oil guide groove and a motor shaft radial oil guide hole arranged between the inner cavity main oil way and the motor shaft excircle axial oil guide groove; the rotor iron core is connected to the motor shaft; the two rotor end plates are respectively connected with the motor shaft and are respectively positioned at two ends of the rotor iron core; the rotor end plate is provided with a radial oil guide groove and a radial oil outlet groove; the radial oil guide grooves in the first rotor end plate are communicated with the axial oil guide grooves in the outer circle of the motor shaft and the rotor iron core magnetic isolation grooves, and the radial oil outlet grooves in the second rotor end plate are communicated with the rotor iron core magnetic isolation grooves. According to the invention, the flow distribution of the cooling oil paths at the two ends of the rotor can be more uniform at various rotating speeds without adding any additional parts, the influence on the dynamic balance of the rotor assembly is reduced, and the heat dissipation uniformity of the stator and the rotor of the motor can be improved.

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 present invention discloses a rotor, a motor and a vehicle, comprising: a rotor core, the rotor core surrounds a center hole, the rotor core is provided with a first mounting slot group and a first connecting structure, the first mounting slot group includes a first mounting slot and a second mounting slot; a first permanent magnet group, the first permanent magnet group includes a first permanent magnet and a second permanent magnet, the first permanent magnet is installed in the first mounting slot, and the second permanent magnet is installed in the second mounting slot; a center block, the center block is assembled in the center hole, the center block is provided with a second connecting structure and a rotating shaft hole, the second connecting structure is a non-magnetic conductive part and cooperates with the first connecting structure, and the second connecting structure extends between the first permanent magnet and the second permanent magnet to separate the first permanent magnet and the second permanent magnet; a rotating shaft, the rotating shaft cooperates with the rotating shaft hole and rotates synchronously with the center block and the rotor core. The rotor according to the present invention can avoid rotor magnetic leakage, and has the advantages of good magnetic isolation effect and high structural strength.

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 discloses a cross coupling calculation method and device based on an unequal-width magnetic circuit model, and the method comprises the steps: adding a permanent magnet equivalent magnetomotive force source into a large-pole magnetic circuit and a small-pole magnetic circuit of a d-axis in a permanent magnet motor through employing a normalization method, and obtaining a normalized large-pole magnetic circuit and a normalized small-pole magnetic circuit, the magnetic circuit model is a d-axis-permanent magnet cross coupling magnetic circuit model based on a normalized large and small pole magnetic circuit method; a magnetic isolation bridge part in the magnetic circuit model is adjusted, a permanent magnet is added, and before the magnetic circuit model is adjusted, a large-pole magnetic circuit triangular area and a small-pole magnetic circuit triangular area are not communicated with the magnetic isolation bridge; in a large and small pole magnetic circuit with permanent magnet magnetomotive force, connecting a triangular area between permanent magnets and a magnetic isolation bridge to obtain a corrected magnetic circuit model after the magnetic isolation bridge channel is corrected; and calculating the total magnetic flux and inductance of the loop by combining the corrected magnetic circuit model and the corresponding equivalent magnetic circuit.

The invention belongs to the technical field of machine vision positioning and guiding, and discloses a nanocrystalline magnetism isolating sheet vision guiding laser deburring device and application thereof, and the nanocrystalline magnetism isolating sheet vision guiding laser deburring device comprises an image acquisition module, an image preprocessing module, a central control module, a laser module, a positioning module, a collection module, a data analysis module and a display module; according to the visual guidance technology, an advanced visual recognition system is introduced, the burr position is accurately positioned by monitoring the surface state of a workpiece in real time, and therefore the more intelligent laser deburring process is achieved. And laser parameter optimization: parameters such as wavelength, power and pulse frequency of laser are optimized according to different materials and burr types, so that the optimal deburring effect is achieved, and meanwhile, the completeness of the workpiece is ensured. And in the laser deburring process, environment-friendly materials and technologies are adopted, the influence on the environment is reduced, and the safety in the operation process is enhanced.

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 discloses an electronic expansion valve with a buffering effect, which includes a stator assembly and a valve seat assembly. The valve seat assembly is installed at the lower part of the stator assembly. The valve seat assembly includes an end cover assembly, a magnetic isolation tube, a valve needle assembly and a valve seat assembly. A lead screw assembly is arranged inside the magnetic isolation tube. The valve needle assembly includes a valve needle and a valve needle spring arranged in the inner hole at the lower end of the valve needle. The lower end of the valve needle is inserted with a valve needle head. A balance flow channel is opened in the middle of the valve needle head. A bushing is sleeved on the outer side of the upper part of the valve needle head. One end of the bushing abuts against the valve needle spring. A valve needle sleeve is arranged at the lower end of the bushing. A valve needle internal leakage O-ring is installed between the inner side of the valve needle sleeve and the valve needle head. The lead screw in the lead screw assembly axially inserts into the central threaded through hole of the valve needle. The present invention has a balance pressure function, a long service life, and a buffering effect when closing the valve, preventing the problem of thread jamming and unable to open the valve.

The axial vibration reduction device comprises a displacement sensor and an axial vibration reduction assembly which are arranged on a rotating shaft of the speed reducer, and further comprises a pre-amplifier, an acquisition and analysis module, a control module and a power supply module. The axial vibration reduction assembly comprises a magneto-rheological elastomer, a magnetism isolating ring, a magnet exciting coil and a metal shell which are sequentially arranged around the rotating shaft from inside to outside. The control module adjusts the rigidity of the magneto-rheological elastomer by changing an electric signal of the magnet exciting coil so as to achieve stepless adjustment of the axial damping force of the rotating shaft, axial vibration loads are attenuated through the magneto-rheological elastomer and then transmitted to the pure iron shell and the base, and the axial vibration reduction effect is improved. The multiple angular contact ball bearings are arranged to block direct impact of vibration loads in two directions one by one, disturbance caused by different vibration loads due to different vibration directions is avoided, more vibration loads are eliminated by the magnetorheological elastomer, and the axial vibration reduction efficiency is further improved.

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 magnetic suspension motor composite rotating shaft comprises a rotating shaft body, a magnetic isolation ring, a magnetic steel strip and a sheath, the rotating shaft body is provided with a plurality of shaft sections which are sequentially arranged along the axial direction of the rotating shaft body, the outer diameters of the adjacent shaft sections are different, and one shaft section in the middle of the rotating shaft body is a magnetic steel installation section; the magnetic isolation rings are fixedly arranged on the outer ring of the magnetic steel installation section in a sleeving mode, a magnetic steel installation space is formed between the two magnetic isolation rings, notches are evenly distributed in the opposite end faces of the two magnetic isolation rings in the circumferential direction, the multiple magnetic steel strips are evenly distributed on the outer circumferential face of the magnetic steel installation section, and the extending direction of the magnetic steel strips is parallel to the axial direction of the rotating shaft body. Two ends of the magnetic steel strip are respectively inserted into the notches; and the sheath coaxially sleeves the outer rings of the magnetic steel strips and the magnetic isolation ring. According to the utility model, the gap between the magnetic steel and the rotating shaft body can be utilized to reduce the probability of heat transfer from the magnetic steel to the rotating shaft body, and the heat dissipation effect can be improved by cooperating with the air holes of the sheath.

The invention relates to a magnetic adsorption walking robot with obstacle crossing and steering functions. The magnetic adsorption walking robot comprises a controller, a rack, a turntable mechanism, at least one magnetic adsorption crawler belt, at least three sets of supporting mechanisms, at least one magnetic isolation mechanism and at least one traction mechanism, supporting mechanisms are at least arranged at the front end, the rear end and the middle position of the rack, each supporting mechanism comprises a supporting driving assembly and at least two walking wheels, and the supporting driving assemblies can drive the walking wheels to stretch out of the adsorption faces of the magnetic adsorption crawler belts; the magnetism isolating mechanisms are arranged on the rack, each magnetic adsorption crawler belt corresponds to at least one magnetism isolating mechanism, and the magnetism isolating mechanisms are used for isolating the adsorption surfaces of the magnetic adsorption crawler belts from the working surfaces; the fixed part of the turntable mechanism is arranged on the rack, the traction mechanism is connected with the rotating part of the turntable mechanism and the top and the bottom of the working surface, and the traction mechanism can pull the rack to walk on the working surface. The robot has good obstacle crossing and steering capabilities, and can adapt to more complex working environments.

The utility model discloses a normally open solenoid valve for an automobile multi-cavity air spring, which comprises a shell, a framework arranged in the shell, an enameled wire wound on the outer side of the framework, a magnetism isolating tube arranged in an inner hole in the middle of the framework, a movable iron core arranged in the magnetism isolating tube, and a cushion block assembly arranged between the magnetism isolating tube and the end part of the movable iron core, an electrical interface is installed at the end of the shell, a valve seat is installed at the second axial end of the shell, a base is installed between the valve seat and the framework, an ejector rod piece capable of moving axially is arranged at the position, corresponding to the valve port, between the base and the valve seat, the first end of the ejector rod piece penetrates through the base to abut against the movable iron core, and a connecting socket is arranged at the end of the framework. The connecting socket is connected with a PIN needle in the electrical interface, a limiting claw is arranged at the side end of the PIN needle, and after the limiting claw is bent, the enameled wire is pressed and fixed on the PIN needle and is subjected to spot welding. The electromagnetic valve can solve the problems that an electric power connection structure of an existing electromagnetic valve is complex, and power connection is not reliable.

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 multi-mode energy-feedback type suspension actuator and a control method thereof, relates to the field of suspension actuators, and particularly aims to solve the problem that an oil-gas energy-feedback type suspension actuator combining an oil-gas spring, a linear motor and a piezoelectric material does not exist in the prior art. The multi-mode energy feedback type suspension actuator comprises an actuator shell and a piston rod, the piston rod is movably inserted in the actuator shell, the multi-mode energy feedback type suspension actuator further comprises a partition plate and a magnetism isolating plate which are arranged in the actuator shell, and the piston rod movably penetrates through the partition plate and the magnetism isolating plate; in the actuator shell, oil is poured into the position above the partition plate, a hydro-pneumatic spring module is arranged, a piezoelectric module is arranged between the partition plate and the magnetism isolating plate, and a linear motor module is arranged below the magnetism isolating plate. Several structures are highly integrated, vibration energy is recycled while vehicle performance adjustment is achieved, vehicle running smoothness and handling stability are improved, and self-energy-supply of a vehicle suspension is basically achieved.

The invention discloses a radial two-degree-of-freedom hybrid magnetic bearing with external permanent magnets. The radial two-degree-of-freedom hybrid magnetic bearing comprises a stator and a rotor. The rotor comprises a rotor iron core, a rotating shaft, two rotor U-shaped grooves, two rotor magnetic isolation aluminum rings and two rotor permanent magnet rings, the stator comprises a stator iron core, a coil, two stator U-shaped grooves, two stator magnetic isolation aluminum rings and two stator permanent magnet rings, and the polarities of the stator and the rotor permanent magnet rings which are opposite up and down are opposite; the permanent magnet rings are respectively embedded into the corresponding U-shaped grooves and are arranged on two sides of the stator core and the rotor core through the magnetic isolation aluminum rings, eight magnetic poles are uniformly distributed in the stator core, eight coils are wound on the magnetic poles, the coils on two poles in the + X,-X, + Y and-Y directions are respectively and reversely connected in series to form suspension windings in the + X,-X, + Y and-Y directions, and then the suspension windings are driven by the four switch power amplifiers. The radial two-degree-of-freedom hybrid magnetic bearing provided by the invention has the advantages of no coupling of permanent magnetic flux and suspension magnetic flux, high suspension precision, low power consumption, easiness in processing and assembling and high suspension force density.

The invention belongs to the technical field of magnetism isolating plates, and particularly relates to a novel magnetism isolating plate which comprises a composite plate, the composite plate is composed of an outermost wear-resistant and corrosion-resistant protective layer, a middle high-permeability magnetism isolating material layer and an inner buffer layer in good contact with protected equipment, and the outermost wear-resistant and corrosion-resistant protective layer can be made of PTFE (polytetrafluoroethylene). The surface of the magnet vane is covered with the coating in a spraying or dipping mode, a uniform protective layer is formed, and the thickness of the uniform protective layer is usually 20 microns 300; and the middle layer of high-permeability magnetic isolation material layer is permalloy composed of 45 N i-Fe alloy containing 45% of nickel and 80 N i-Fe alloy containing 80% of nickel. According to the invention, the outermost layer is wear-resistant and corrosion-resistant, such as a PTFE or aluminum oxide ceramic layer, so that the interior is protected; the middle high-permeability magnetic isolation material layer effectively isolates a magnetic field; the inner buffer layer provides buffer, the buffer holes disperse stress and absorb energy and buffer, and the interval grooves enhance the fitting degree, so that stable operation of equipment in various complex environments is ensured jointly, and the service life of the magnet vane and the service life of the equipment are prolonged.

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 relates to the technical field of building construction, and discloses a house building foundation engineering construction device which comprises a multi-shaft pile driver body, a power integration box is installed on one side of the multi-shaft pile driver body in a limiting and sliding mode, and a plurality of stirring piles are rotatably installed at the output end of the power integration box; driving gears are fixedly mounted on the outer sides of the top ends of the stirring piles, the multiple driving gears are in meshing transmission, and mounting cavities formed in the inner side walls of the driving gears are further included. The connecting strength between the mixing pile and the driving gears is changed through coincidence or dislocation between the permanent magnet plates and the magnetism isolating plates, so that the probability that the mixing pile is damaged when the bottom end of the mixing pile encounters a hard obstacle is reduced, and the situation that a plurality of driving gears bear extra load and impact due to mutual meshing is avoided; the driving gear and the power system are protected, the service life of the multi-shaft pile driver body is prolonged, the influence of hard obstacles on the construction progress is reduced, and the construction progress and the engineering quality of the sealing wall are improved.

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 relates to the technical field of connectors, and particularly discloses a connector with a shielding function, which comprises a shell and a circuit board accommodated in the shell, the circuit board is provided with conductive welding spots and a grounding part, the circuit board is connected with an external cable through a conductive group, the circuit board is provided with a housing used for separating the plurality of conductive welding spots, the housing is provided with a shielding assembly used for covering the conductive welding spots, and the shielding assembly comprises a cover body made of a magnetic isolation material. The arrangement of the housing can effectively separate and protect a plurality of conductive welding spots on the circuit board, prevents short circuit or mutual interference among the conductive welding spots, improves the reliability and stability of the circuit board, and the shielding assembly can further enhance the protection of the conductive welding spots, reduces the interference of an external electromagnetic field on the conductive welding spots through the shielding effect, and improves the reliability of the circuit board. And meanwhile, an electromagnetic field generated by the conductive welding spot is prevented from influencing the external environment.

The invention discloses an asymmetric hybrid magnetic pole permanent magnet and electromagnetic hybrid excitation driving motor, which belongs to the technical field of automobile motor electric appliances, and comprises a fan, a front end cover, a rear end cover, a casing, a hybrid excitation rotor and a stator, the fan is arranged on one side of the rear end cover, and the casing is arranged between the front end cover and the rear end cover. The hybrid excitation rotor comprises a claw pole electric excitation rotor, a permanent magnet rotor with an asymmetric hybrid magnetic pole structure and a magnetic isolation bushing arranged between the claw pole electric excitation rotor and the permanent magnet rotor, the permanent magnet rotor comprises a rotating shaft, a rotor core and eight rotor magnetic poles, the rotor core is pressed on the rotating shaft, and the rotor magnetic poles are arranged on the rotor core. The asymmetric hybrid magnetic pole permanent magnet and electromagnetic hybrid excitation driving motor is low in harmonic content of the whole machine, high in output quality, large in magnetic adjustment range and good in voltage stabilization performance.

The present invention provides a rotor and a motor having the same. Among them, the rotor includes: a rotor core having a mounting hole, multiple groups of mounting portions and a first magnetic isolation groove. The mounting hole is used for mounting a rotating shaft, and the multiple groups of mounting portions are arranged at intervals along the circumferential direction of the mounting hole; along the radial direction of the rotor core, the first magnetic isolation groove is located between the mounting hole and the multiple groups of mounting portions; a plurality of first permanent magnets; wherein, each group of mounting portions includes at least two mounting grooves arranged at intervals along the circumferential direction of the rotor core, each mounting groove extends along the radial direction of the rotor core, and at least one first permanent magnet is arranged in each mounting groove; in two adjacent groups of mounting portions, the first permanent magnet arranged in one mounting groove of one group of mounting portions and the first permanent magnet arranged in another mounting groove adjacent to this mounting groove in the other group of mounting portions form a magnetic pole. The present invention effectively solves the problem of low motor efficiency in the prior art.

A wireless power supply system and monitoring device for a monitoring device of a rotating part of a locomotive, the wireless power supply system includes an energy transmitting module and an energy receiving module, the energy transmitting module includes a DC power supply, an inverter and a first LC oscillating circuit electrically connected in sequence, the energy receiving module includes a second LC oscillating circuit electrically connected in sequence, a rectifier and a load, the first LC oscillating circuit includes a first inductor, the second LC oscillating circuit includes a second inductor, the wireless power supply system also includes a first magnetic isolation material layer and a second magnetic isolation material layer, the first magnetic isolation material layer is arranged between a gear box and the first inductor, the second magnetic isolation material layer is arranged between a rotating shaft and the second inductor, the first coil of the first inductor is arranged on the first magnetic isolation material layer, the second coil of the second inductor is arranged on the second magnetic isolation material layer, and the first coil and the second coil are electromagnetically coupled. The wireless power supply system can realize stable and reliable energy supply for the monitoring device on the rotating part of the locomotive.

A semi-direct drive permanent magnet synchronous motor for a pumping unit, the semi-direct drive permanent magnet synchronous motor comprising a housing, and a stator and a rotor arranged in the housing. The rotor comprises a rotor core, magnetic steel slots arranged on the rotor core, and magnetic steel arranged in the magnetic steel slots. A magnetic isolation bridge is arranged on the side of each magnetic steel slot close to an outer edge of the rotor core, and a hollow magnetic isolation part is arranged on the side of the magnetic steel slot close to the middle of the rotor core. A magnetic pole is arranged between each two adjacent magnetic steel slots, and the sides of the two pieces of magnetic steel located on two sides of the magnetic pole and facing the magnetic pole have a same polarity. Compared with the prior art, the present invention has the following advantages: each hollow magnetic isolation part is arranged on the side of the magnetic steel close to the middle of the rotor core, which effectively suppresses the flux leakage of the magnetic steel while achieving weight reduction of the rotor core and improving the energy conversion efficiency of the motor. The provision of a first reinforcing annular plate and a second reinforcing annular plate improves the mechanical strength of the rotor and compensates for the impairment to strength caused by the hollow magnetic isolation parts; moreover, the magnetic steel is lowered down to be covered therein, so that harm caused by the magnetic steel falling off is eliminated.

1. The name of this design product: magnetic isolation sleeve. 2. Purpose of this design product: used as a magnetic isolation sleeve. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: Stereoscopic diagram 1.

The embodiment of the invention provides a magnetic isolation feedback circuit which comprises an error amplifier unit, a modulator unit and a demodulator unit. The magnetic isolation feedback circuit is used for transmitting an error signal of an output voltage sampling signal Vos of a secondary side of the LLC resonant triode converter to a primary side of the LLC resonant converter so as to control the duty ratio of a first primary side switching tube QH and a second primary side switching tube QL of the LLC resonant converter; the error amplifier unit is used for amplifying an error signal of the output voltage sampling signal Vos to generate an amplified error signal; the modulator unit is used for modulating the input amplified error signals into square wave signals with the same amplitude; and the demodulator unit is used for demodulating the modulated square wave signal into a direct current signal with the same amplitude. According to the scheme, the forward converter is used as a modulator, so that a magnetic isolation feedback circuit with good temperature characteristics and radiation resistance characteristics is provided.