最新刊期
期 6 ， 2019
- 摘要：This paper analyzed the role of national policies in promoting the development of intercity EMUs, systematically analyzed intercity, line, passenger flow and other factors, and put forward the top-level indicators and future development direction of intercity EMUs based on the overall development idea of the industry.关键词：Intercity EMUs;top level technical index;trunk rail transit network;regional rail transit network;urban rail transit network;intercity rail transit network
- 923
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- 12
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发布时间：2021-12-13 - 摘要：Disc brake is widely used for railway vehicles and cars. During the braking process, the brake disc and the brake shoe generate a large amount of heat, which affects the braking performance, so it is necessary to perform thermal analysis on the brake disc. Based on the application and importance of disc braking on trains, the common materials, structure types and related thermal analysis of train brake discs were introduced, and different thermal analysis methods of brake discs were compared. Finally, the present situation and development direction of thermal analysis of train brake discs were summarized and prospected.关键词：disc brake;brake disc material;brake disc structure;thermal analysis;high-speed train
- 476
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- 7
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发布时间：2021-12-13
Synthesis & Review
- 摘要：In view of the serious train impulse caused by the application of the power electronic switch automatic passing neutral section technology, a dynamic moment unloading and loading control strategy was proposed which was suitable for the very short-term network voltage interruption, to realize the train traction force maintaining during the power loss time to actively suppress the train impulse;The generation mechanism of inrush current of transformer under the condition of extremely short-time switching of different phase network voltage was revealed, and the active suppression strategy of inrush current suitable for different phase network voltage switching was put forward; an optimized phase-locked strategy was expounded based on the combination of fast single-phase phase-locked and traditional phase-locked loop with coordinate transformation, which could effectively solve the problems of abnormal train control and traction long recovery time under the condition of passing neutral section with electronic switch. In the main line test of Shenshuo railway, the simulation of full load train passing through the power electronic switch neutral section, which fully proved the correctness and effectiveness of the proposed control strategy.关键词：electronic switch;passing neutral section;train impulse;fast phase lock;switch with remanence, inrush current;dynamic torque control;simulation
- 827
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- 7
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发布时间：2021-12-13 - 摘要：The feasible scheme of upgrading the train control system of trunk railway to realize the operation of 350 km/h EMUs to adapt to the operation of ordinary railway lines was analyzed, and the implementation scheme of installing train operation monitoring device (LKJ) on EMUs was focused on, which was considered to be optimal, and was conducive to the integration of technology and application among different levels of train control systems under China's CTCS system.关键词：350 km/h grade EMUs;CTCS;LKJ;interconnection and interworking;line level
- 742
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- 5
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发布时间：2021-12-13 - 摘要：The lateral stability of high-speed EMUs is related to passenger comfort and even safety. Summarizing the experience of high-speed railway operation in recent years, the mechanism, influencing factors and solving measures of lateral stability of high-speed EMUs were studied through theoretical research, simulation analysis and application test. It was concluded that: the dynamic stiffness of anti-snake absorber has a great influence on the lateral stability of the vehicle; the main reason for the high-frequency snake vibration of the bogie is the poor matching between the local track position and the not full rail head after the wheel tread wear, which could effectively improved by maintaining the wheel and rail status regularly.关键词：high-speef EMUs;lateral stability;wheel profile;wheel-rail interaction;high-speed train
- 769
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- 4
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发布时间：2021-12-13 - 摘要：In order to adapt to the development requirements of fast freight transportation, a 250 km/h freight EMUs traction converter was designed by optimizing the control of the rectifier, traction inverter and auxiliary inverter of the existing converter.The simulation results showed that the improved algorithm could improve the quality of the current signal at the grid side, reduce the harmonic content of the auxiliary converter output voltage, and improve the imbalance between the voltages of the auxiliary converter output. Functional and research tests showed that the temperature rise results met the actual requirements, and the type tests also verified the rationality of the electrical system design of 250 km/h freight EMUs.关键词：freight 250 km/h EMUs;4-quadrant converter;traction inverter;auxiliary inverter;carrier phase shifting;simulation
- 733
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- 10
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- 0
发布时间：2021-12-13 - 摘要：In the process of high-speed operation of railway vehicles, the local tread scratches and stripping caused by emergency braking or wheel pair skidding and idling are collectively referred to as wheel flat scar. Based on computational multi-body dynamics and wheel-rail contact theory, a dynamic model of EMUs considering flat scar impact was established to simulate the dynamic response characteristics of vehicles. On the basis of this model, the influence of old and new flat scar and geometric dimensions wheel pairs on the dynamic behavior of vehicle system was studied. The vibration status of vehicle body, frame and axle box at different speeds was given, and the influence of wheel flat scar on dynamic performance under high-speed driving conditions was determined. The results showed that wheel flat scar has a great influence on wheel-rail contact and axle box vertical excitation of high-speed EMUs. Under the action of wheel flat scar, wheel rail impact and axle box vibration are much more serious than that of normal wheel rail; on the other hand, due to the existence of low-frequency filtering function of primary spring and secondary air spring, the influence of wheel flat scar vibration excitation on frame and body is weakened.关键词：wheel flat scar;wheel rail impact;EMUs;dynamic performance;high-speed train;simulation
- 604
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- 5
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发布时间：2021-12-13 - 摘要：To solve the problems of power quality and neutral section passing in AC electrified railway, a new traction power supply system based on MMC-MTDC was studied. Aiming at the phenomenon of large power overshoot caused by frequent load changes, an improved droop control strategy based on PI controller was proposed, which took into account both the stabilization of DC voltage and the improvement of power flow. The steady-state and transient characteristics of the control strategy were analyzed. In order to solve the problem that the double-frequency circulating current of single-phase MMC would cause the double-frequency fluctuation of DC side voltage and power, and also affect the power fluctuation of network side, the proportional complex integral (PCI) controller was used to design a circulating current suppressor suitable for both three-phase and single-phase MMC. Finally, a detailed simulation model was built in PSCAD/EMTDC to simulate the operation conditions of the traction power supply system and verify the effectiveness of the proposed control method.关键词：multi-terminal direct current (MTDC);traction power supply system;improved droop control;modular multilevel converter (MMC);circulating current suppress;simulation
- 720
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- 2
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发布时间：2021-12-13 - 摘要：According to the structural dimensions, lubrication, sealing, life, reliability and maintainability of axle box bearings,the performances of bearings used in existing EMUs were analyzed in detail. Combining with the characteristics of 250 km/h standard EMUs and the future development direction, the feasible suggestions for the selection of bearings were provided, and selection scheme of axle box bearing for 250 km/h standard EMUs was formed.关键词：bearing;type selection;250 km/h standard EMUs
- 576
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- 6
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- 0
发布时间：2021-12-13 - 摘要：Aiming at the structure characteristics and performance of asynchronous traction motor for narrow track diesel locomotive, analysis and calculation were carried out in details, and the general technical index and structure parameters were determined. The structure and main technical performance of CDJD113B asynchronous traction motor were introduced, including its structure design principles and its main parameters. Prototype testing and proving results showed that the designed and developed CDJD113B asynchronous traction motor could meet the requirements of the specification with the advantages of good performance and high reliability.关键词：diesel locomotive;AC drive;narrow track;asynchronous traction motor;CDJD113B
- 595
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- 3
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发布时间：2021-12-13 - 摘要：In order to protect the high-voltage electrical equipment on the roof of Fuxing EMUs from the influence of external harsh environment and ensure the good working performance of the equipment, the high-voltage electrical box on the roof of EMUs was developed, and the components such as vacuum circuit breaker, high-voltage grounding switch, high-voltage disconnector,lightning arrester and transformer were integrated. According to the use conditions of high-voltage electrical box, the insulation performance analysis was carried out to determine the basic insulation capacity parameters of high-voltage electrical box; based on the design method of gas-solid composite insulation, the insulation top cover and insulation partition were designed to solve the problem of insufficient insulation in the height direction of the box; through the strength simulation calculation of high-voltage electrical box, the stress situation and safety factor of high-voltage electrical box under 7 different working conditions was calculated. Through the insulation performance test and impact vibration test, the insulation performance and structural strength of the prototype were tested and verified. The test results showed that the high-voltage electrical box could meet the requirements of insulation design, structural strength and EMUs operation.关键词：EMUs;high voltage electrical box;insulating property;compound insulation;strength simulation;experimental verification
- 654
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- 2
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发布时间：2021-12-13 - 摘要：The CR200J power concentrated EMUs are power concentrated EMUs, developed to enhance the comfort of China's railway general speed train passengers and the transportation capacity of passenger dedicated lines. The power car was designed based on the principles of interconnection, interoperability, and mutual control. After testing and assessment, it was finalized as FXD1-J and FXD3-J. Based on the positioning and function of the FXD3-j power car, this paper expounded the design principle, studied the design index of the top-level of the power car, and focused on the overall technical indicators such as the limit, axle weight, traction performance, equipment layout, and speed grade of the power car. The practical application showed that the FXD3-j EMUs meet the design requirements.关键词：power concentration;EMUs;power car;top-level design;the overall plan
- 1760
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- 7
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发布时间：2021-12-13 - 摘要：The hybrid power unit integration and the design process of its device were introduced, the analysis method of strength,mode and fatigue with ANSYS was expounded, and the theoretical analysis target from CAD design to CAE verification was realized. The results showed that the hybrid unit device could carry the mounting body well and ensure the reliability and safety of the whole vehicle power transmission system. At the same time, using the design method, the design cycle was shortened, the assembly efficiency of the whole vehicle was improved, and the application of hybrid power integration technology in track construction machinery was promoted.关键词：hybrid power unit;CAD;CAE;the modal analysis
- 396
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- 2
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发布时间：2021-12-13 - 摘要：In order to shorten the development cycle and improve the assembly efficiency of the car body, the CKD6E electric drive shunting diesel locomotive body was developed with modular technology. The technical parameters of the body of CKD6E electric drive shunting diesel locomotive, the structural characteristics of the major parts of the body, the connection structure between the body modules and the composition of the frame assembly were mainly introduced. The practical application showed that the design of the car body module met the expected requirements.关键词：CKD6E electric drive shunting diesel locomotive;structure of car body;connecting structure between modules of car body;modular
- 465
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- 6
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发布时间：2021-12-13 - 摘要：The permanent magnet direct drive system was studied from two aspects of direct drive structure and direct drive permanent magnet synchronous motor, and be applied on electric locomotive at the first time. The ground test and rolling test bench test of traction system were carried out, which showed that the system has the advantages of high efficiency, energy saving and so on.The implementation of this project provided a reference for the research and application of permanent magnet direct drive technology,and actively promoted the technical development of permanent magnet direct drive system in the field of rail transit in China.关键词：permanent magnet direct drive system;flexible plate coupling;permanent magnet synchronous motor;permanent magnet material;electric locomotive
- 531
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- 8
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发布时间：2021-12-13 - 摘要：The superconducting magnet based on the second-generation high-temperature superconducting (HTS) tape can work at 15 K to 77 K. Compared with the low-temperature superconducting (LTS) magnet working below 4.2 K (the liquid helium temperature zone), the refrigeration cost of HTS magnets is lower, which can get rid of the scarce resources of liquid helium in China.In this paper, the primary design of the overall structure of high temperature superconducting magnet was carried out based on the open data of the vehicle mounted low temperature magnet of the standard Yamanashi maglev test line. Based on the finite element simulation, the electromagnetic and mechanical transfer structure and heat leakage of the magnet were analyzed, and a comprehensive design scheme of the vehicle mounted high temperature superconducting magnet suitable for full-scale and high-speed electric maglev was obtained.关键词：electric suspension;HTS magnets;finite element simulation
- 428
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- 2
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发布时间：2021-12-13 - 摘要：With the rapid development of heavy haul freight train technology in China, especially the new type of freight car brake technology, the difficulty of air brake performance test for long formation trains is also increasing. The structural characteristics and design parameters of each truck brake are the same, and the performance of single vehicle test is the same, but the process of air pressure transmission is different under the condition of initial inflation of train tube and braking relief. By establishing the mathematical model of air pressure in train brake pipeline and combining the single valve and single vehicle physical test, the semi-physical simulation test platform of whole train about brake condition and mitigation condition was established. The hardware-in-the-loop test platform required that the simulation model was controlled in real time through hardware interface, and the model was revised according to the real data collected from the test to ensure the rationality and scientificity of the established test simulation model, and the brake aerodynamics equation was used for analysis and solution. In this paper, the aerodynamic partial differential equations method was used, and the characteristic line method and the gas volumetric charge and discharge model were used for analytical simulation calculation. Combined with the correction function for real-time correction, the real-time control of the semi-physical simulation test system was realized, which provided a theoretical basis for intelligent test platform and an ideal mathematical model.关键词：air brake;experiment;hardware-in-the-loop simulation;equation analysis;heavy-duty freight train
- 675
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- 2
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发布时间：2021-12-13 - 摘要：In order to solve the problem of vehicle-guideway coupling vibration, a full-state feedback optimal control method based on reduced-order observer was proposed, which took the single magnet-guideway coupling vibration system as the research object, and had been validated effectively on a small-scale test rig. The results showed that the reduced-order observer could accurately and rapidly estimate the state of the system with good effect, and had simple structure and easy to be realized in engineering. The control method could still make the system stable without considering the damping effect of the track beam, and effectively restrain the coupling vibration. Moreover, it reduced the requirement of the stability of the system for the rigidity of the track beam, and greatly reduced the construction cost of the maglev traffic.关键词：maglev train;vehicle-guideway coupling vibration;reduced-order observer;optimum control;simulation
- 432
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- 2
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发布时间：2021-12-13 -
Design and Shielding Effect Test of Antimagnetic Plate Based on Air-cored Reactor for Metro Vehicles
摘要：Leakage magnetic field generated by the air-cored reactor will produce electromagnetic pollution in the metro system, therefore, magnetic shielding of the antimagnetic plate is of crucial importance. First, the three-dimensional finite element model of the air-cored reactor was built. Second, the distribution of the leakage magnetic field without antimagnetic plate was analyzed and compared with the results with antimagnetic plate. In addition, the influences of the antimagnetic plates with different material and different size on the flux density at the different height inside subway cars were investigated. Finally, the on-board test of the designed anti-magnetic board was carried out. The experimental results showed that the designed anti-magnetic board met the requirement that the air gap flux density at 30 cm above the floor inside the compartment was less than 0.8 mT.关键词：metro vehicle;air-cored reactor;leakage magnetic field;magnetic shielding;antimagnetic plate;simulation- 642
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发布时间：2021-12-13 - 摘要：Technical development and interaction relationships of parking brake and towing mode device for locomotive were introduced briefly. Design scheme and operation mechanism of the parking brake was analyzed emphatically. The improved scheme could ensure the safety of locomotive parking brake and towing mode, which provided a development direction for related design and operation in the future.关键词：electric locomotive;parking brake;towing mode;problem analysis;design improvement
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- 6
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发布时间：2021-12-13 - 摘要：Using UIC standard Goodman-Smith diagram method and JIS standard fatigue evaluation method, the side beam welding structure of the subway bogie frame was taken as the research object, whose fatigue strength was contrastive studied by using finite element method. The fatigue strength of single-sided fillet welds and fillet welds in the back welding position was evaluated respectively by the crack propagation method and nominal stress method in the JIS standard. Meanwhile, the structural stress method of UIC was used to evaluate the fatigue strength of weld toe of fillet welds. The results showed that the fatigue evaluation by using the UIC standard to assess the weld toe of the welded joint of the frame met the fatigue strength requirements, while the fatigue evaluation by using the JIS standard to assess the welding root of the welded joint of the frame did not meet the fatigue strength requirements.Therefore, for the welded frame fillet welds, the two standards should be combined to evaluate the fatigue strength of both the weld toe and the weld root.关键词：welded frame;fatigue strength;JIS standard;UIC standard;Goodman-Smith diagram;FEM;subway
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- 3
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发布时间：2021-12-13 - 摘要：In view of the low degree of information and intelligence in running-in test of rolling stock bogies, it was difficult to realize fault diagnosis and fault location of bearings and gearboxes quickly and accurately in the test process. Microphone array technology was applied to running-in test, which could directly realize fault diagnosis and fault location through sound signals. Fault simulation experiments were carried out for the common faults of bogie bearing inner and outer rings. Acoustic signals generated by the faulty bearing were collected and analyzed. Signal envelope spectrum was obtained through specific data processing methods to realize fault diagnosis. At the same time, fault location was realized by combining the location algorithm based on arrival delay. In order to meet the needs of the field, a set of array brackets was designed to facilitate the accurate layout and flexible transformation of microphone arrays. The reliability and accuracy of the algorithm and array brackets were verified by simulation experiments.关键词：microphone array;bogie;fault diagnosis;fault source location;rolling stock
- 495
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- 3
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发布时间：2021-12-13 - 摘要：According to the circuit of power supply system for grinding motor of double power rail grinding train, the requirement of selecting material for isolating transformer core was put forward. The relationship between core loss and magnetic density was analyzed by measuring the loss values of 30Q130 silicon steel sheet with magnetic density of 1.2 T, 1.3 T and 1.4 T at 120 Hz frequency. Based on core loss curves of 30Q130 silicon steel sheet, 23JGH100 silicon steel sheet and B20R070 silicon steel sheet, the surface temperature rise of iron core when three kinds of silicon steel sheet were used is analyzed and calculated. By comparing the values of magnetic density, loss and temperature rise of three kinds of core materials, the core materials and magnetic density of isolating transformer were determined.关键词：isolating transformer;magnetic density;temperature rise;core loss;silicon steel sheet
- 432
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- 2
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发布时间：2021-12-13
Research & Development
- 摘要：An electric brake power control method for hybrid trams was introduced, which solved the problem that the energy storage system could not fully absorb the electric braking power. Under the premise of ensuring the deceleration of tram electric brake, through the IGBT chopper circuit connected in series with the braking resistor, the power consumed in the braking resistor was adjusted in real time and the electric braking power was fed back to on-board energy storage system to the maximum extent, while not exceeding the power limit of energy storage system, protecting the energy storage system, improving energy utilization efficiency and increasing trams cruising range. At the same time, the problem was solved that when the unidirectional power supply system (such as hydrogen fuel cell system, the internal combustion engine power generation system, etc.) and on-board energy storage device were in hybrid power supply, output power response rate failed to meet the demand of the traction system for power response rate. This scheme has been verified on hydrogen energy low floor trams and achieved good control results.关键词：hybrid tram;electric braking power;energy storage system;IGBT chopper circuit;braking power regulation;urban rail transit
- 627
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- 5
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发布时间：2021-12-13 - 摘要：Due to the operation characteristics of short distance between stations, start acceleration and brake deceleration frequently and the huge energy generated by regenerative braking for the metro vehicles can be absorbed and stored by flywheel energy storage device. Based on the control strategy for recycling regenerative braking energy of the flywheel energy storage, the great energy generated by regenerative braking of metro vehicles was absorbed by slywheel charging the flywheel energy storage device could be used to absorbed regenerative braking energy, and sent it back when vehicles start. The charging and discharging control strategy of flywheel energy storage was analyzed, and the parameter setting formula of the current, voltage and speed regulators were provided.The flywheel energy storage device could meet the requirements of operation was verified by simulation, and effectively control the voltage fluctuation in the metro traction power supply system.关键词：regenerative brake;energy feedback;flywheel energy storage;inverter;metro vehicles;simulation
- 350
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- 2
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发布时间：2021-12-13 - 摘要：The selection of electric brake management scheme for urban rail vehicles directly affects the service life of brake shoe of the brake system. Choosing reasonable electric brake management scheme can greatly reduce the wear of brake shoe of brake system and prolong the service life of brake shoe. Firstly, the electric braking management scheme of urban rail vehicles at the present stage was introduced, and then a comparative analysis from two aspects of network transmission delay and pneumatic braking application was made. Finally, the data of existing projects was verified, and some application suggestions were put forward, that was,the electric braking management scheme for calculating the electric braking force by the traction system.关键词：urban rail vehicles;electric brake management;network transmission delay;air brake application;contrastive analysis
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- 5
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发布时间：2021-12-13 - 摘要：The gear transmission system is used to transmit the traction motor torque to the axle, and during the running process it may have a relaxation state. With the comparison of the traction motor speed and the wheelset speed during the traction, electric braking and air braking process, the relaxation state of the metro train gear transmission system could be diagnosed. The proposed method has the advantages of utilizing the existing vehicle system equipment without additional equipment, and has been applied on a domestic subway line.关键词：metro train;gear transmission system;relaxation;state diagnose;traction;electric braking;air braking;fault diagnosis
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- 2
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发布时间：2021-12-13 - 摘要：In order to realize intermittent power supply for tramcar, the types of intermittent power supply were determined according to the line characteristics, the types of energy storage devices were determined according to the demand of intermittent power supply for tramcar, the power requirements of energy storage devices were determined from the performance requirements of vehicles, and the energy requirements were determined by the conditions of non-charging of three continuous stations, accidental parking and accidental start-stop, which determined the scheme of the energy storage device finally. The vehicle has been commissioned and put into operation. The performance of the vehicle has passed the test and the actual operation test, which proved that the energy-type super capacitor met the requirements of intermittent power supply for tramcar.关键词：tramcar;power supply technology;energy storage device;super capacitor;intermittent power supply;simulation
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- 2
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发布时间：2021-12-13 - 摘要：The axle-bridge is one of the key bearing components of the light rail train whose structural strength directly affects the safety of the train. The independent axle-bridge for a certain light rail train as the research object, was parametrically modeled to analyze the stress and deformation of the axle-bridge under different load conditions. The maximum equivalent stress and deformation was chosen as the objective function and the structure geometry size as a variable. Based on the response surface method (RSM), Latin hypercube sampling (LHS) was used to select a certain number of sample points for parameter sensitivity analysis. The results showed that the breath of axle head and thickness of flange significantly influenced deformation, as well as stress, in the selected parameters,providing a reference for the axle-bridge optimization design.关键词：light rail train;axle-bridge;analysis of sensitivity;optimization design;reliability;response surface method;FEA
- 374
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- 2
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发布时间：2021-12-13 - 摘要：In view of the uneven distribution of urban rail transit passenger flow, more and more urban rail transit lines adopt multi-train coin-line operation. In order to adapt to train coupled and continue to operate normally, a coupling scheme of on-board signal system of urban rail transit was designed, and the normal operation of different types of train reconnection was supported. The online hybrid operation of multi-marshalling trains could effectively improve operation efficiency and reduce operation cost.关键词：urban rail transit;reconnection;signal system;train control based communication(CBTC)
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发布时间：2021-12-13 - 摘要：Aiming at the problem of excessive noise in passenger rooms of metro vehicles in small radius curves, the influence of vehicle air conditioning system, track status and vehicle vibration on noise in passenger rooms was analyzed based on Brüel & Kjær test system. The analysis results showed that the vibration acceleration of the passenger rooms floor was 4.7 times higher than that of the straight road when the vehicle running line was small radius curve; with the increasing of the vehicle running speed, the influence of air conditioning system on the passenger rooms noise decreased gradually; and the sound source was mainly located in the middle of the door page and the floor, which was related to the rail corrugation with the significant wavelength of 25~40 mm. Passenger rooms noise was mainly affected by two factors: on the one hand, due to the low track attenuation rate, the vibration excitation input was transmitted vertically and horizontally through axle box-frame-car body, thus stimulating the structural vibration of passenger rooms to produce radiated noise; on the other hand, the rail radiated noise was transmitted to the car through the weak links of door and floor insulation after the reflection of tunnel wall was strengthened. Suggestions for operation improvement were put forward in terms of speed limit of small radius curve vehicles and periodic rail grinding.关键词：metro vehicle;small radius curve;acoustics;noise;vibration;sound pressure
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发布时间：2021-12-13
Urban Rail & Vehicle
- 摘要：The axlebox lifting lug of a metro vehicle had broken several times, so that vibration test, modal structure optimization and resonance fatigue assessment were carried out for the lifting lug. The test results showed that the reason of lifting lug breakage was the resonance between the corrugation frequency and the first natural mode frequency of the lifting lug. The lifting lug model was verified and the structure was optimized by simulation analysis. Based on the data which was measured on corrugation line, the lifting lug’s fatigue life was evaluated by the method of narrow-band fatigue life assessment and Dirlik fatigue life assessment method, and the assessment result was consistent with actual situation. It showed that the narrow-band method was basically feasible to evaluate the resonant fatigue life. For resonance fatigue, when the dominant frequency was absolutely single, the results of Dirlik method was agree with narrow band method.关键词：axlebox lifting lug;vibration test;modal structure optimization;resonance fatigue life assessment;metro vehicle;simulation
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发布时间：2021-12-13 - 摘要：To provide a more convenient test environment for the design and development of software and hardware in the urban rail energy feedback system, a hardware-in-loop test system was built. The mathematical modeling of some key devices in the test system was analyzed, and the multi-cores calculation problem was resolved through model decoupling of the transformer.The hardware-in-loop test and verification were carried out with the actual controller. The test results proved the effectiveness of the simulation system and model.关键词：urban rail transit;energy feedback;hardware-in-loop simulation;transformer
- 595
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- 2
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发布时间：2021-12-13
Test & Detection
- 摘要：Working principle and structure of auxiliary inverters (SIV) for metro vehicles on Nanjing metro line S8 were introduced. The deficiencies in the control of auxiliary inverters for metro vehicles were summarized by analyzing the causes of faults,and relevant optimization measures were put forward. With the test and verification of projects, the problems existing in the auxiliary inverter were solved, which improved the stability of the auxiliary power supply system of the subway train, reduced the operation and maintenance cost.关键词：Nanjing metro line S8;SIV;fault diagnosis;control;subway trin
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发布时间：2021-12-13 - 摘要：In view of the blocked phenomenon of the current collector in the application process, the main influencing factors were analyzed. Through the structural optimization, the finite element analysis of the established model was carried out by using the finite element software and the rain sand blasting tests were carried out. The results showed that the deformation of the optimized structure was 53% of the original one, and the current collector was not blocked.关键词：urban rail vehicle;current collector;block;optimize structure;FEA;rain sand blasting test;simulation
- 777
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发布时间：2021-12-13
Operation & Maintenance
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