258 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 discloses a motor insulation breakdown voltage prediction method based on a continuous hidden Markov model, and the method comprises the steps: taking a plurality of groups of obtained experimental data of an insulating material of a motor in different motor operation time periods as a training set, and enabling the experimental data to comprise capacitance, insulation resistance, dielectric loss, maximum discharge capacity and breakdown voltage; constructing a continuous hidden Markov model by taking the test parameters as an observation sequence and taking the discretized breakdown voltage as a hidden state; performing iterative calculation on parameters of the continuous hidden Markov model through a Baum-Welch algorithm based on the training set, and determining optimal parameters of the continuous hidden Markov model; and based on the continuous hidden Markov model of the optimal parameters, determining a hidden state sequence with the maximum probability under the observation sequence at the current moment through a Viterbi algorithm, and determining the breakdown voltage at the current moment based on the hidden state sequence with the maximum probability. According to the invention, the breakdown voltage of the motor insulating material in the motor operation process can be effectively predicted.

A fault detection system of a motor belongs to the technical field of motor fault detection, and aims to solve the problems that the existing motor fault detection device is high in detection difficulty and inaccurate in fault reason judgment. The fault detection system comprises the steps that a frequency converter is adopted as a motor starter, and the input voltage of the motor is gradually increased; a harmonic detection module is adopted to detect the harmonic component of a current signal output by the motor, and the harmonic detection module outputs a harmonic waveform; detecting whether the motor is in a normal operation state, a winding short-circuit fault state, a winding open-circuit fault state or a bearing fault state according to the harmonic waveform; a built-in insulation monitoring module of the frequency converter is adopted to detect the insulation resistance value of the motor; judging a motor leakage state according to the insulation resistance value; a torque measuring module arranged in the frequency converter is used for detecting the torque of the motor; judging a motor torque fault state according to the torque; a temperature sensor arranged in the frequency converter is used for detecting the temperature of the motor; and judging a motor fault state according to the temperature. The method is used for motor fault detection.

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 axial magnetic flux motors, in particular to wire inserting equipment and a wire inserting method of an axial magnetic flux motor insulation framework. An axial flux motor insulation framework coil inserting device applied to the axial flux motor insulation framework coil inserting method comprises an opening and closing tool, a first driving assembly, a second driving assembly and a third driving assembly, the opening and closing tool is used for bearing an insulation framework, and multiple sets of elastic structures are arranged in the opening and closing tool; each group of elastic structures is used for connecting a single insulating framework, and the first driving assembly can drive the elastic structures to synchronously stretch or contract along the radial direction of a preset point, so that the plurality of insulating frameworks connected with the plurality of groups of elastic structures are switched among a divergent state, an initial state and a folded state; the second driving assembly is used for being connected with a stator iron core and driving the stator iron core to move in the preset direction, the third driving assembly can drive the insulating framework in the folded state to be separated from the opening and closing tool in the preset direction, and the winding requirement, the wire arranging requirement and the wire inserting requirement of the insulating framework are met.

The invention discloses a voltage distribution and insulation weak point prediction method based on a flat wire winding of a variable frequency motor, and belongs to the technical field of motor design and insulation evaluation. The method comprehensively considers the geometrical shape, the insulation structure, the working voltage and the like of a motor stator, establishes a complete finite element model of a flat wire winding motor, and improves the reliability of the motor. According to the method, distribution parameters such as capacitance, inductance and resistance of a cable and a motor winding are extracted, a winding 'I-type high-frequency equivalent circuit model is built, field-circuit coupling electromagnetic analysis is carried out by utilizing finite element simulation software, the process can be automatically realized through a compiled program, and a user only needs to provide an original motor model and working parameters, so that the method is simple and easy to implement. According to the method, the voltage distribution of the flat wire type motor winding under variable frequency driving can be efficiently and accurately predicted, the radar map capable of visually displaying the insulation weak point is generated, a new thought is provided for positioning the insulation weak point of the motor, the motor design is guided and optimized, and the evaluation efficiency and accuracy of the insulation performance of the motor are improved.

A motor positive pressure waterproof structure, a motor and a waterproof control method are used for preventing water from entering the motor, the motor comprises a shell and a rotating shaft, a cavity is formed in the shell, and the positive pressure waterproof structure comprises a positive pressure section and a waterproof section which are arranged on the rotating shaft. The pressurization structure is arranged on the machine shell and corresponds to the positive pressure section, and the oil seal structure is arranged on the machine shell and corresponds to the waterproof section. According to the scheme, friction and loss between the rotating shaft and the oil seal deformation layer under high-speed operation are avoided, friction and loss between the rotating shaft and the oil seal deformation layer under low-speed operation and other working conditions are reduced, the service life of the oil seal structure is greatly prolonged, motor insulation damage and burnout caused by external water entering the motor are avoided, and the service life of the motor is prolonged. Stable pressure balance is formed in the motor cavity, the safety and reliability of the motor are improved, the service life of the motor is prolonged, and the stability of the motor is improved.

The invention provides a charger insulation and reverse connection test method and system, a storage medium and a product, and relates to the technical field of charging piles. And applying a voltage to the input end of the charger based on the screened adaptive initial DC voltage value and a boost strategy. Meanwhile, the internal insulation resistance value is monitored in real time. And according to the resistance change curve and the qualified interval in the test parameters, fine comparison is carried out, and the timestamps, the voltage values, the current values and the resistance values corresponding to abnormal points are quickly called out once the abnormal points are found. A voltage simulation signal generated by reverse connection simulation of an input end and a ground wire is sent to the charger, a complex electrical environment at the reverse connection moment is simulated, an internal protection mechanism of the charger is triggered, whether the charger responds normally or not is monitored, if yes, signal sending is stopped in time, and overload damage is avoided. Insulation test and reverse connection test processes are integrated, the defects of function splitting and complicated operation of related technologies are avoided, and the problems of high operation difficulty and high cost are solved.

The invention relates to the technical field of motor fault diagnosis, in particular to an on-line diagnosis method for insulation potential grounding of an inverter driving traction motor, and mainly solves the technical defects that the operation period is influenced and the detection accuracy is low in the existing stator insulation off-line detection. According to the method, firstly, zero-sequence current data and zero-sequence unbalance degree are calculated according to motor three-phase stator current data, secondly, the zero-sequence current data are preprocessed, then wavelet packet noise reduction is carried out, high-frequency noise interference in zero-sequence current is filtered out, the signal-to-noise ratio of signals is improved, then, Hilbert envelope demodulation analysis is carried out on the filtered signals, and finally, the zero-sequence unbalance degree is obtained. And finally, in the envelope spectrum, an amplitude value at a fault characteristic frequency is extracted, a signal energy value in a frequency band near the frequency is calculated, and dynamic learning, analysis and judgment of a fault threshold are carried out in combination with a zero-sequence unbalance degree, so that insulation potential grounding online diagnosis is realized.

To provide an electrical insulation film for motor that does not break during motor assembly and has a superior heat resistance, even when the film is made thinner.SOLUTION: An electrical insulation film for motor contains polyaryletherketone and polyetherimide and has at least two glass transition temperatures between 150 and 250°C.SELECTED DRAWING: Figure 1

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 present invention discloses an automatic motor insulation skeleton insertion device. It solves the problems of manual assembly of stators in the prior art, high human resource requirements, low wage efficiency, and unreasonable structure of existing equipment, requiring multiple steps to complete assembly, and low work efficiency. The device includes an assembly mechanism, on which a stator core transfer mechanism, an insulation skeleton transfer mechanism, and a finished product transfer mechanism are connected; the assembly mechanism includes a platform mechanism and a pushing mechanism arranged on both sides of the assembly station, the platform mechanism includes a platform plate and a pneumatic telescopic block, the pneumatic telescopic block detects that the insulation skeleton falls into place and controls the storage mechanism to block the insulation skeleton from falling, the pneumatic telescopic block shrinks downward, and the first pushing mechanism pushes the insulation skeleton into place and installs it on the stator core. The present invention automatically completes the stator assembly without manual operation or multiple steps, saving manpower and improving production efficiency. It has a simple structure, low production requirements, and saves production costs.

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 invention provides a preparation method of a solid rocket engine heat insulation layer structure. The preparation method comprises the following steps that S1, a first heat insulation layer bottom layer prefabricated part is prefabricated through a mold pressing method; the outer side of the first heat insulation layer bottom layer prefabricated part is connected with a metal connector; s2, a second heat insulation layer bottom layer prefabricated part is prefabricated through a mold pressing method; s3, the first heat insulation layer bottom layer prefabricated part, the anti-ablation layer and the second heat insulation layer bottom layer prefabricated part are bonded, and then in a mold, a heat insulation layer bottom layer is prepared through an autoclave vulcanization technology; s4, forming a heat insulation layer cover layer prefabricated part by adopting an integral one-step vulcanization process; and S5, putting the heat insulation layer bottom layer prefabricated part and the heat insulation layer cover layer prefabricated part into a mold, and molding through an autoclave vulcanization process to obtain the solid rocket engine heat insulation layer structure. According to the heat insulation layer structure manufactured through the method, the thickness requirement of each heat insulation layer can be met, the size is accurate, and the product quality is remarkably improved.

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 utility model relates to the technical field of motor maintenance, and discloses a motor insulating paint funnel which comprises a supporting assembly and a pulley arranged at one end of the supporting assembly, a containing container is arranged in the middle of the outer surface of the pulley through a rope, a liquid injection pipe is arranged at the lower end of the containing container, and a receiving assembly is arranged at the lower end of the liquid injection pipe. A scraping assembly is slidably mounted in an inner cavity of the receiving assembly, when an operator sprays paint on a motor, a rope is pulled to drive a containing container to ascend, a liquid injection pipe at one end of the containing container pours insulating paint on the motor, and the operator puts the motor at the upper end of a gap plate in an inner cavity of a square block in advance; according to the arrangement, redundant insulating paint of the motor can be collected to the bottom of the inner cavity of the square block while paint spraying of the motor is not affected, meanwhile, paint points splashed in the paint spraying process can be shielded through the arrangement of the extending baffle magnetically connected to the upper end of the square block, and the sanitation during paint spraying is improved.

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.