150 results about "Motor insulation" patented technology

The invention relates to a low-voltage motor insulation resistance online monitoring and early warning method, system and device and a medium. The method comprises the following steps: firstly, acquiring multi-dimensional operation data through a data acquisition link to form an original monitoring data set; preprocessing the original monitoring data set, and focusing core information through dimension reduction processing to obtain a key parameter set; and then inputting the key parameter set into a dynamic correlation model constructed based on a long short-term memory network, and outputting a prediction result of the variation trend of the insulation resistance value along with time and the deterioration degree quantification. And finally, carrying out early warning analysis based on a prediction result, and generating early warning fault features in combination with a real degradation judgment process. According to the method, the insulation resistance trend and the degradation degree are accurately predicted, the defect of insufficient real-time performance of off-line detection is overcome, the accuracy and the pertinence of fault early warning are improved, and equipment shutdown and safety risks caused by insulation faults are effectively reduced.

The invention relates to the technical field of motor measurement, in particular to a motor insulation diagnosis method and device based on multi-physical field data fusion, and the method comprises the steps: collecting a multi-dimensional physical quantity signal related to insulation degradation; extracting a plurality of characteristic parameters representing the insulation state according to the multi-dimensional physical quantity signal; and inputting the plurality of characteristic parameters into a pre-constructed insulation health assessment model to output an insulation health index, and performing motor safety early warning under the condition that the insulation health index is greater than a preset index, the insulation health assessment model is constructed based on a pre-established mapping relation between the multi-dimensional characteristic parameters and the insulation health state. Therefore, the problems that the real health state of motor insulation cannot be reflected in time and the potential insulation breakdown risk cannot be early warned due to inaccurate insulation degradation identification caused by single general feature acquisition and one-sided diagnosis mode in related technologies are solved.

The invention relates to the technical field of motor insulation state monitoring, and discloses a motor winding turn-to-turn discharge monitoring method and device based on Rogowski coils. The high-pass integrator is matched to carry out integral operation on coil output signals in a centralized mode to obtain high-frequency discharge current data, then fault characteristic quantity is constructed based on the data, the fault position of the motor cable is determined, an independent monitoring module does not need to be configured for each phase of cable, and the single high-pass integrator can complete centralized processing of multi-coil signals. Not only is the use amount of core monitoring parts greatly reduced to reduce the monitoring cost, but also the hardware layout is remarkably simplified to save the installation space, and meanwhile, the data processing nodes are reduced to reduce processor resource occupation, and the problems of high monitoring cost, large space and resource consumption and low monitoring efficiency in the prior art are effectively solved.

The invention relates to an insulation state monitoring method and device, computer equipment, a computer readable storage medium and a computer program product, relates to the technical field of insulation state monitoring, and can improve the accuracy of motor insulation state monitoring. The method comprises the following steps: receiving a monitoring demand for a motor; determining a plurality of target sensing paths from a plurality of candidate sensing paths used for acquiring different types of insulation state parameters according to monitoring requirements, and acquiring a plurality of target insulation state parameters through the target sensing paths; determining a plurality of insulation characteristics of the motor based on the plurality of target insulation state parameters, fusing the plurality of insulation characteristics, and determining an insulation degradation type according to the fused insulation characteristics; and displaying the insulation degradation type and the plurality of insulation state parameters corresponding to the insulation degradation type.

The application discloses a kind of generator stator winding partial discharge quantity's inversion method and system, belong to large-scale rotating electrical machine insulation state diagnostic technical field, method includes: obtaining or estimating the key distributed capacitance parameter in insulation structure multi-capacitance equivalent circuit model, mapping relationship database is established;Partial discharge detection is carried out to the generator stator winding of applied test voltage, and the characteristic information of discharge pulse is collected;Based on the key distributed capacitance parameter in mapping relationship database, pre-generated pulse waveform-defect capacitance calibration curve, the characteristic information of discharge pulse collected is executed nonlinear iterative inversion calculation;Quantitative evaluation, type identification and health diagnosis are carried out to the insulation defect of generator stator winding.The application introduces pulse waveform feature into partial discharge physical quantity inversion, improves the accuracy, quantitative level and defect identification ability of generator stator insulation state evaluation, provides technical support for generator life extension and condition maintenance.

The invention relates to the field of motor life, and discloses a method and device for predicting the residual life of a motor and a medium, and the method comprises the steps: determining a first frequency domain signal corresponding to partial discharge in the motor; wherein the first frequency domain signal comprises a target characteristic peak corresponding to the partial discharge; determining a first predicted mileage value corresponding to the motor based on the target characteristic peak in the first frequency domain signal; and determining the residual life of the motor based on the first predicted mileage value. The anti-interference capability of the frequency domain signal is strong, and the target characteristic peak is very sensitive to degradation phenomena such as early aging and microdefects of a motor insulating material, so that the scheme combines the frequency domain signal and the target characteristic peak of the frequency domain signal to predict the service life of the motor, interference misjudgment of the time domain signal and information loss of a single characteristic can be avoided, and the accuracy of prediction is improved. The motor full life cycle state can be accurately correlated, and the precision and accuracy of residual life prediction are significantly improved.

The utility model relates to a compressor motor insulation reel which is especially suitable for a motor with a three-phase winding adopting angle connection. The winding frame comprises an annular body, and nine winding parts are arranged on the inner side of the annular body in the radial direction. Three wide winding openings and three narrow winding openings are formed in the upper portion of the annular body, the width T of the wide winding openings is larger than the width t of the narrow winding openings, and the wide winding openings are head end outlets and tail end outlets of three-phase winding leads of the motor respectively. And three lead limiting clamps with downward openings are arranged near the three winding wide openings and are used for fixing the head ends of the leads and preventing the leads from loosening or falling off. Seven lead limiting protruding parts are arranged on the radial outer side of the annular body and distributed at different horizontal heights to form high and low distribution at different horizontal heights, and the lead limiting protruding parts are used for separating leads of windings of different phases and preventing virtual connection or short circuit. According to the utility model, the electrical performance and the mechanical stability of the motor are improved by optimizing the lead management and the winding design, and the motor has the advantages of simple structure, convenience in operation and high reliability.

The invention discloses an insulation fault detection method for a vehicle motor, a motor controller, a system, a medium and an electric automobile, and the method comprises the steps: detecting whether the motor has torque output or not under the condition that a power battery and the motor controller are connected; a motor shell of the motor and the vehicle body are electrically common-grounded; if yes, the sum of the three-phase currents of the motor is obtained, and when the sum of the three-phase currents of the motor is larger than a set current threshold value, it is determined that the motor has an insulation fault; wherein the current of each phase of the motor is detected by the corresponding current sensor; if not, an upper bridge arm in any bridge arm circuit connected with the motor is controlled to be in a closed state, the voltage sensor is used for detecting the voltage amplitude of a first pre-charging capacitor in the motor controller, and when the voltage amplitude of the first pre-charging capacitor is larger than a set voltage threshold value, it is determined that the insulation fault exists in the motor.

The utility model discloses a double-oil-seal sealing system for an integrated power assembly of a new energy heavy truck. The double-oil-seal sealing system comprises an end cover shared by a motor and a transmission, a rotating shaft, a bearing, a grease lubricating oil seal and an oil lubricating oil seal, the oil lubricating oil seal can block oil liquid, and the grease lubricating oil seal can block oil gas, so that lubricating oil and the oil gas in the transmission cannot enter a motor cavity. The problem that a motor insulation system is damaged and loses efficacy due to the fact that lubricating oil and oil gas of the transmission of the integrated power assembly of the new energy heavy truck leak into a motor cavity can be solved only by adding one grease lubricating oil seal, the ventilation valve and the oil plug, the structure is simple, cost is low, reliability is high, and practical engineering popularization is easy.

The present application relates to a motor insulation fault detection method, device, computer equipment, and storage medium. The method includes: generating a DC excitation voltage and an AC excitation voltage based on a power-on signal of a frequency converter; applying the DC excitation voltage and the AC excitation voltage to any two phases of the motor to be tested, respectively, to obtain test response data of any two phases of the motor to be tested; calculating an insulation degradation index based on the test response data; and determining the insulation state of the motor to be tested based on the insulation degradation index and a preset index threshold. The present application does not require the provision of an additional fault detection device. By automatically applying a composite AC / DC excitation voltage to the motor through the frequency converter, the motor can effectively simplify the detection process of the motor insulation fault and improve detection efficiency.

The utility model belongs to the technical field of high-voltage motor insulation detection, and discloses a detection device, in the detection device, a wire harness is electrically connected with a detection element, a connector is used for being electrically connected with a to-be-detected element, so that the detection element is electrically connected with the to-be-detected element, the to-be-detected element can be detected through the detection element, and the connector is placed in a storage groove. The cover plate is arranged on the shell and can enter and exit from the containing groove through the opening, so that when the wire harness is too long, a part of the wire harness can be placed in the containing groove, the situation that too many wire harnesses are exposed and affect workers is avoided, and the cover plate can move relative to the shell to open or close the opening; the cover plate driving part is used for driving the cover plate to move, so that when the detection device is not used, the cover plate driving part drives the cover plate to close the opening so as to seal the storage groove, the wire harness and the connector are prevented from being directly exposed outside, the effect of protecting the wire harness and the connector can be achieved, in addition, the cover plate is driven by the cover plate driving part, manual operation is not needed, and use is convenient.

The utility model relates to calender technical field, concretely is a kind of new energy motor insulation material calender, including calender main body, the inside rotation of calender main body is connected with the array distribution conveying roller, conveying belt is sleeved on conveying roller, the upside of calender main body is respectively fixedly connected with four vertical recessed plate, the inside of four vertical recessed plate is slidably connected with T type slide, fixedly connected with U-shaped support between four T type slides, the inside rotation of U-shaped support is connected with calender roller;The upside of U-shaped support is fixedly connected with rack, the utility model drives rack and pinion mechanism by first servo motor, accurately controls the lifting of calender roller, so that it can be flexibly adjusted height according to different processing needs, it is applicable to different thickness new energy motor insulation material, then the guiding design of T type slide and vertical recessed plate ensures that calender roller moves smoothly, improves the stability and applicability of calendering process.

The utility model discloses an insulating framework, a stator block and a motor, and the insulating framework comprises a first framework body, a second framework body, and a first telescoping connecting piece. A first telescopic connecting piece is arranged between the first framework body and the second framework body, the two ends of the first telescopic connecting piece are connected with the first framework body and the second framework body respectively, and the first telescopic connecting piece, the first framework body and the second framework body define an inserting groove. The slots are used for the insertion of the tooth parts of the iron core blocks, and the first telescopic connecting piece is extended or shrunk by adapting to the width of the tooth parts of the iron core blocks. Through the arrangement of the first telescopic connecting piece, the first telescopic connecting piece can be extended or shrunk when the first framework body and the second framework body are subjected to acting force of getting close to each other or getting away from each other, so that the width of the slot is changed to adapt to iron core blocks of different sizes and types; and only one insulation framework is needed to adapt to various stator iron core blocks, so that the manufacturing cost is reduced.

The utility model discloses a motor insulation resistance tester, and belongs to the technical field of insulation resistance testers. The tester mainly comprises a tester body, and the tester body is provided with a wiring port. The protection mechanism is installed on the tester body, the protection mechanism comprises an installation plate, the installation plate is installed on the tester body, and a cover plate is installed on the installation plate in a hinged mode; the mounting seat is mounted on the tester body, a spring is mounted on the mounting seat, a buckling block is mounted at one end of the spring and comprises a convex block, and concave holes are formed in the two sides of the fixing rod; the pulling and holding rod is mounted on the buckling block, and one end of the pulling and holding rod movably penetrates through the mounting seat. According to the motor insulation resistance tester, through arrangement of the mounting plate, the cover plate, the grip, the fixing rod, the concave hole, the mounting seat, the buckling block, the spring, the pulling rod and the handle, dustproof sealing is performed on the wiring port when the motor insulation resistance tester is not used, so that external dust, moisture, greasy dirt and the like are prevented from entering the wiring port.

The invention discloses a high-voltage motor stator winding partial discharge signal identification method and system, and relates to the technical field of high-voltage motor insulation state monitoring, and the method comprises the following steps: obtaining a partial discharge signal of a high-voltage motor stator winding; sequentially carrying out wavelet packet decomposition and feature extraction on the partial discharge signal to obtain a feature vector; inputting the feature vector into a pre-trained CS-RF model to obtain a final recognition result; the pre-trained CS-RF model is obtained through training by taking the minimum expected misclassification cost as a node splitting objective function, and the expected misclassification cost is obtained through calculation of a preset misclassification cost matrix. According to the invention, the problem of limited fault identification precision caused by misclassification equalization, insufficient feature extraction pertinence and unbalanced sample categories in the prior art can be solved.

The invention discloses a service life evaluation method for a flywheel energy storage motor under insulation square wave voltage and environmental stress. The service life evaluation method comprises the following steps: constructing an accelerated aging experiment platform comprising temperature control, air pressure control, a high-frequency and high-voltage square wave source, partial discharge detection and a breakdown protection circuit; multiple groups of accelerated aging tests are carried out on the motor insulation sample through a control variable method, and service life models under the square wave frequency, the rise time, the environment temperature and the air pressure single stress are obtained respectively; taking each single-stress life model as a life item, combining with a coupling life correction item, and establishing a multi-stress life evaluation model in a reciprocal form of the sum of reciprocals of the life items; and calculating a coupling life correction term and averaging by inversely solving an equivalent value of the single-stress life model under a multi-stress reference condition to complete model parameter calibration. The service life prediction precision and reliability are remarkably improved.

This stator (10) comprises a stator core (24), an insulator (16) for insulating the stator core, and a coil winding section (18) that is wound around the stator core with the insulator interposed therebetween. A ventilation path (56) extending in the axial direction of the stator core is formed between the stator core and the coil winding section.

This application provides a zigzag-structure insulation detection device, system, and method for high-voltage motors, applied in the field of high-voltage motor insulation detection technology. The device includes a zigzag-shaped metal casing and a three-phase high-voltage current-limiting resistor sealed with silicone rubber at its upper end. Inside the casing are six high-voltage isolation relays, a DC high-voltage generation module, a sampling and processing unit, an intelligent processing unit, and an LCD display device. These are permanently connected to the three-phase windings of the motor via flexible wires and circular copper connectors. After determining that the motor meets the safe shutdown conditions, the system sequentially selects the insulation type to ground or between phases, controls the on / off combinations of the six relays to reconstruct the measurement circuit, injects DC voltage, and continuously acquires voltage signals. It calculates the first insulation resistance value, the second insulation resistance value, and the absorption ratio. All insulation objects are divided into ground-to-ground and phase-to-phase groups, and the average value and deviation are calculated for horizontal comparison and vertical comparison with historical data. An early warning sign is generated based on the differences.

The invention relates to the technical field of motor detection, and discloses an online motor insulativity detection device and method. The device comprises a detection circuit, a sampling circuit and a microcontroller, the detection circuit is electrically connected with a casing and a winding of the motor and is used for applying a high-voltage detection signal between the casing and the winding; the sampling circuit is used for collecting an initial voltage signal at a sampling resistor in the detection circuit, converting the initial voltage signal through an optocoupler and transmitting the converted initial voltage signal to the microcontroller; and the microcontroller is used for comparing the received voltage signal sampling value with a preset voltage reference value to judge whether the insulativity of the motor is good or not. The isolation degree between circuits is improved through the optocouplers, so that the detection safety is ensured, and the accuracy of a detection result is improved.

The present invention relates to an insulation system (1) for insulating electrical machines, comprising A) at least one insulating paper (2) comprising a first protective layer (4) and an insulating layer (6), and B) at least one cover layer (10), wherein the cover layer (10) has a CTI value according to IEC 60112 of > 600 V and / or a PLC / PTI value according to UL 746 of zero. The invention further relates to the use of the insulation system (1) for insulating electrical machines and to insulation (100) obtained or obtainable from the insulation system (1). The invention also relates to a stator (200) of an electrical machine, wherein the stator core (202) has insulation (100) at the slots (214a, 214n). The invention further relates to a method for insulating an electrical machine.

The present invention discloses an insulation structure for a new energy motor, which belongs to the technical field of motor insulation. The structure comprises a base and a stator, wherein an installation groove is provided inside the stator. Extrusion strips are slidably installed inside the installation grooves, and shifting posts are installed at both ends of the extrusion strips. Connecting rings are installed at openings at both ends of the base, and arc grooves cooperating with the shifting posts are equidistantly provided on the connecting rings. Connecting plates for binding windings are fixedly connected at equal distances on one side of the connecting rings. A moving component for driving the connecting rings to move is provided between the connecting rings and the connecting plates, and a driving component for driving the two connecting rings to move in opposite directions is installed inside the base. The structure of the present invention cooperates with insulating slot wedges to ensure that the windings will not loosen due to vibration or electromagnetic force during motor operation, significantly reduce vibration and noise generated during motor operation, improve the overall performance of the motor, and ensure stable operation of the motor.

The invention provides an aviation variable frequency motor insulation life prediction model modeling method and a motor insulation life prediction method, and relates to the technical field of electrical engineering, and the method comprises the steps: carrying out an accelerated aging test through a mode of adjusting a test temperature, a test air pressure and a test voltage amplitude in stages; adjusting the upper and lower limits of each test parameter according to the motor insulation failure time obtained by the accelerated aging test to obtain insulation accelerated aging test conditions; and selecting a test point in a range of insulation accelerated aging test conditions to carry out an accelerated aging test, and repeatedly executing expression fitting optimization operation and model verification operation until a prediction error between a prediction result of the life prediction model and a real result is smaller than a preset error threshold value. According to the aviation variable frequency motor insulation life prediction model modeling method and the motor insulation life prediction method provided by the invention, the insulation failure time under the coupling action of high voltage, high winding temperature and high-altitude low-pressure environment can be accurately predicted.

The present invention relates to the field of materials technology. A motor insulation paper and a preparation method thereof are provided. The method comprises: chemically grafting carboxyl-functionalized PBO fibers, carboxymethyl chitosan, ethylenediamine, and dimethylformamide to obtain PBO fibers grafted with carboxymethyl chitosan; preparing a shell solution using the PBO fibers grafted with carboxymethyl chitosan; preparing a core solution using boron nitride nanotubes and carboxymethyl chitosan; coaxially electrospinning the shell solution and the core solution to obtain shell-core structured nanofibers; adding deionized water to the shell-core structured nanofibers, pulping by shear mixing, and obtaining nanofiber pulp; filtering the nanofiber pulp and drying it to obtain rough paper; and hot-pressing the rough paper to obtain motor insulation paper. The motor insulation paper has high thermal conductivity and excellent electrical and mechanical properties.

The application discloses a kind of methods and systems for quickly evaluating the test of corona resistance of enameled wire, it is related to motor insulation life evaluation and corona performance test technical field, including simulating the corona stress caused by frequency conversion motor operation to enameled wire, according to frequency band different excitation time and safety protection strategy are automatically matched;Based on different types of sensors, the analysis is carried out to enameled wire electric response signal;Signal multi-domain feature analysis is carried out, and the comprehensive corona tolerance of enameled wire is comprehensively evaluated.The method disclosed in the application constitutes a rigorous logic closed loop in modeling, perception and evaluation level: driven by real excitation model, combined with nonlinear response identification, and then fed back to test control through multi-domain feature score, effectively opening the key link in the whole process of enameled wire insulation corona performance evaluation, so as to build a kind of high authenticity, high robustness, quantifiable fast corona test method.

The invention discloses a motor insulation paper automatic paper inserting control method and device, and relates to the technical field of motor manufacturing, and the motor insulation paper automatic paper inserting device comprises a stator positioning rotation module, a material pressing assembly, an insulation paper feeding and paper inserting module and a cutting module. The insulation paper feeding and inserting module comprises a heating forming device and a pushing mechanism with load detection. The method comprises the following steps of: finishing mechanical zero alignment and compression of a stator by using a positioning convex edge of a stator jig; heating the insulation paper and calculating a target paper feeding length; the air inflow is adjusted through the electric proportional valve, the pushing mechanism is driven to vertically push the insulation paper into the stator groove from bottom to top, and meanwhile the pushing resistance is recorded; the paper is cut off and reset after being inserted in place. According to the method, the paper feeding length is corrected through the thermal-mechanical coupling model, and the thrust closed-loop control is carried out, so that the problems of thermal deformation error and thrust buckling of the insulation paper are effectively solved, and the paper inserting precision and stability are remarkably improved.

The application discloses a universal motor insulation detection device, and relates to the technical field of motor insulation detection.The universal motor insulation detection device comprises a conveying device, a conveying belt is arranged in the conveying device, one rack is arranged on one side of the conveying device, a first electric sliding rail is slidably connected to the inner side wall of the top end of the rack, and a motor body is arranged on the conveying belt.The test probe can be flexibly adjusted in position and posture, so that a single detection device can automatically adapt to and accurately contact diversified wiring terminals of different types of motors, such as AC asynchronous motors, DC motors, synchronous motors and servo motors, thereby realizing efficient and automatic universal detection of the insulation performance of various types of motors, significantly improving equipment utilization and detection efficiency, and being especially suitable for multi-model sampling inspection in mass production and detection requirements of various types of repair motors after use failure, and effectively solving the problems of poor universality and inconvenient switching of existing automatic detection devices.

The application discloses a motor anti-corona material corona resistance performance test device, system and method, relates to the high-voltage motor insulation technical field, and the test device comprises a plate electrode assembly and a blade electrode, the plate electrode assembly is used for bearing a sample to be tested, and a grounding electrode is fixed to the lower surface of the plate electrode assembly; the bottom of the blade electrode has a straight line blade with a length of 50 mm+ / -0.1 mm, the main body curvature radius of the blade cross-section profile is 0.22 mm+ / -0.008 mm, the straight line blade is formed by the intersection of two inclined sides, the blade included angle is 53.14 DEG, and the corner at the length direction end has a roundness with a diameter of 3 mm+ / -0.2 mm; during the test, a uniform and spacing-adjustable discharge gap is formed between the surface of the straight line blade and the surface of the sample to be tested on the upper surface of the plate electrode assembly. The application solves the problems that the existing test device cannot simulate a real non-uniform electric field and is difficult to produce standardized corona erosion, and realizes efficient and repeatable quantitative evaluation of the corona resistance performance of the anti-corona material.

The invention relates to an epoxy resin composite material for offshore wind turbine equipment insulation and a preparation method thereof, and belongs to the technical field of offshore wind turbine equipment insulation materials. The preparation method of the epoxy resin composite material for offshore wind turbine equipment insulation comprises the following steps: performing plasma treatment on nano MgF2, dispersing the treated nano MgF2 in an activating solution to obtain a MgF2 dispersion liquid, and then adding an initiator and styrene for grafting reaction to obtain modified MgF2; and dissolving the modified MgF2 in a solvent to obtain a premixed solution, dispersing the modified epoxy matrix in the premixed solution, adding the curing agent and the accelerant, uniformly stirring, defoaming, curing, cooling and demolding to obtain the high-performance epoxy resin. The epoxy resin composite material for offshore wind turbine equipment insulation is excellent in hydrophobicity and insulativity, high in interface bonding strength and capable of adapting to the severe operation environment of offshore wind turbine wind power high humidity, high salt mist and strong vibration; the insulating material can be used for core insulating parts such as a new energy offshore wind turbine cabin high-voltage bus insulating support, a hub motor insulating bush and a submarine cable terminal insulating sealing element.

The present application relates to a kind of unmanned aerial vehicle micro motor temperature rise analysis and life prediction method, comprising: in the process of unmanned aerial vehicle flight, the real-time temperature of three parts of micro motor winding slot, permanent magnet pole face and bearing inner ring is collected, and load current, rotating speed and flight attitude parameter are recorded simultaneously;With the real-time temperature of three parts as the basis, the initial temperature rise data is dynamically corrected in combination with the heat dissipation difference corresponding to load current, rotating speed and flight attitude parameter, and the actual temperature rise rate of each part is obtained;Based on the actual temperature rise rate of each part, in combination with the rated resistance temperature corresponding to the insulation grade of micro motor, the life attenuation rate under current working condition is determined;The actual running time of micro motor is accumulated, and the consumed life is obtained by actual running time and life attenuation rate calculation, and the remaining life prediction value and life warning signal of micro motor are output.In the present application, the defect that the precision of current micro motor temperature rise analysis and life prediction is not enough is overcome.