Electric Motor Coach Research Articles

The Simulation for the Electro-Hydraulic Power Steering Assisted Control System of Electric Motor Coach

With its energy-saving and green & non-pollution feature, the electric motor coach has been become the focus of public attention, but it also brought the new challenge for the steering system and the matching assisted control system. In this paper it made the introduction for the principle and structure of electro-hydraulic power steering control system, and also carried out the modeling and simulation for the assist characteristic, motor model, steering control valve and assisted control system of the electro-hydraulic power steering assisted control system, finally established the EHPS model and its assisted control system model by using MATLAB/Simulink, to build the practical foundation of the electro-hydraulic power steering assisted control system in the car.

Electric Hydraulic Power Steering System Design Based on Electric Motor Coach of Mixed H2/H∞ Control

The Electric motor coach has become the focus of attention for its energy saving and green non-polluting, but it also poses a new challenge to feedback aspects of steering system and steering feeling. To enhance high-speed handling road sense, this article suggested using genetic algorithm to optimize mixed H2/H∞ system for boosting steering feeling control ability of hydraulic power steering system of electric motor coach based on analyzing electric hydraulic power steering system and feedback torque mathematical model of steering wheel. Simulation result showed that the accumulative error between torque feedback of steering wheel and wheel load torque is obviously reduced after optimization, and the feedback feeling of drivers to road sense has been strengthened.

纯电动汽车动力电池箱仿真分析

电动汽车电池箱内装有锂离子蓄电池模组，电池箱通过快换锁止机构锁紧于托架上，托架固定于电动汽车上，电池箱既要满足车辆运行的安全性又要满足换电机器人频繁更换的要求。由于电池箱在电动客车行驶过程中受力工况较为复杂，本文基于计算机辅助分析(CAE)技术，对公司生产的电动商用车电池箱箱体进行不同工况下的力学强度分析，并进行优化设计，既达到了减轻重量及成本的要求，又保证了车辆运行过程中的安全性能。通过青岛、天津、南京等多地装有该快换电池箱的纯电动商用车的实际运行表明，CAE方法设计出的快换电池箱能满足车辆运行安全性的要求，为以后电动汽车快换电池箱的设计改进提供理论依据，一定程度上促进了电动汽车行业的发展。 The battery box of electric vehicle equipped with lithium ion storage battery module, the main bearing mechanism, and through the quick lock mechanism is locked on the battery box’s bracket, which is fixed on the electric vehicle, not only satisfying the vehicle operating’s safety, but also satisfying the requirement of electric robot’s full- automatic frequent transposing. Owing to the fact that electricity stress condition is comparatively complex in the process of electric motor coach running, this article is based on the computer auxiliary analytical technique, strength analysis under different conditions company procreative the battery box of electric motor coach, and optimal design, then not only achieve the requirements and reduce the cost, but also guarantee the vehicle operating’s safety performance. According to the practical action of pure electric vehicle which equipped with this quick change of battery box in Qingdao, Tianjin, Nanjing etc., through CAE method designs quick change of battery box satisfy the requirement of vehicle operating’s safety. The method provided theoretical basis for the design and improvement of quick change battery box of electric vehicle design in the future, and promoted the development of electric vehicle business.

Planning Torque Distribution Control of Rolling Stock for Fine Anti-slip/skid Re-adhesion Control

Generally, under a wet railway track condition, the axle adhesion coefficient of a train gradually increases from the head of a rolling stock. The improvement of adhesion characteristics is important in an electric motor coach. In order to suppress the slip/skid phenomenon, we have already proposed an anti-slip/skid re-adhesion control system based on a disturbance observer and sensor-less vector control. Moreover, we have confirmed that this system drives the train with the high adhesion force utilization ratio.This paper discusses the theoretical characteristic of the axle adhesion coefficient distribution of a rolling stock, which is based on the axle adhesion coefficient data of Shinkansen. In order to maintain the desired driving force performance, this paper proposes a new planning torque distribution control based on the axle adhesion coefficient distribution. This paper points out that the proposed method well maintains the desired driving force performance by the numerical simulation results.

Anti-Slip/Skid Re-Adhesion Control of Electric Motor Coach Based on Disturbance Observer and Sensor-Less Vector Control

When the adhesion coefficient between rail and driving wheel decreases, the electric motor coach has slip phenomena. We have already proposed the anti-slip re-adhesion control system based on disturbance observer. This system has the fine torque response for one driving wheel driven by one inverter-fed induction motor. However, the bogie of electric motor coach has four driving wheels driven two induction motors. These induction motors connected in parallel are often driven by one inverter. In order to realize the anti-slip and anti-skid re-adhesion control system for the bogie of electric motor coach, this paper proposes a new re-adhesion control method based on disturbance observer and speed sensor-less vector control.

速度センサレスベクトル制御·外乱オブザーバによる空転再粘着制御の実車両への適用とその評価<br>-205系5000番代電車における実例-

The improvement of adhesion characteristics is important in electric motor coach. We have already proposed the anti-slip/skid re-adhesion control system based on disturbance observer and sensor-less vector control. The effectiveness of the proposed method has been confirmed by the experiment and the numerical simulation using the tested bogie system of electric motor coach.Then, we apply the proposed method to the actual electric multiple units, which is Series 205-5000. In the experimental results of Series 205-5000, this paper discusses that the proposed anti-slip/skid re-adhesion control system has the desired driving wheel torque response. Moreover, this paper proposes the evaluation method of re-adhesion control test results.

Anti-Slip Re-adhesion Control of Electric Motor Coach (2M1C) Based on Disturbance Observer and Speed Sensor-less Vector Control

When the adhesion force coefficient between rail and driving wheel decreases, the electric motor coach has slip phenomena. We have already proposed the anti-slip re-adhesion control system based on disturbance observer. This system has the fine torque response for one driving wheel driven by one inverter-fed induction motor. However, the bogie of electric motor coach has four driving wheels driven two induction motors, which are, in some cases, driven by one inverter. In order to realize the anti-slip re-adhesion control system for the bogie of electric motor coach, this paper proposes a new anti-slip re-adhesion control based on disturbance observer and speed sensor-less vector control. The numerical simulation and experimental results point out that the proposed anti-slip re-adhesion control system has the desired driving wheel torque response for the tested bogie system of electric motor coach.

An Approach of Anti-slip Readhesion Control of Electric Motor Coach Based on First Order Disturbance Observer

In electric motor coaches, when the adhesion force coefficient between rail and driving wheel decreases suddenly, the electric motor coach has slip phenomena. We have already proposed the anti-slip control system based on ordinary disturbance observer. In order to realize the more stable anti-slip readhesion control in case of large variation of adhesion force coefficient, this paper proposes a new anti-slip readhesion control based on first order disturbance observer and new torque function. In the numerical simulation results in this paper, the proposed anti-slip readhesion control well regulates the driving wheel torque of electric motor coach stably.

Anti-Slip Control of Electric Motor Coach Using Adhesion Force Coefficient Estimator Based on Disturbance Observer

In electric motor coaches, when the adhesion force coefficient between rail and driving wheel decreases suddenly, the electric motor coach has a slip phenomena. This paper proposes a new estimation method of the adhesion force coefficient, which is based on disturbance observer. Moreover, the proposed adhesion force coefficient estimation system is applied to a new anti-slip control method in this paper. In the numerical simulation results in this paper, the proposed anti-slip control method well regulates the driving wheel torque of electric motor coach and keeps the maximum value of adhesion force coefficient curve.

Power Converters for Feeding Asynchronous Traction Motors of Single-Phase AC Vehicles

Asynchronous induction motors are very well suited to powerful traction drives. For electric locomotives and motor coaches with single-phase supply, a power conversion on the vehicle is necessary. Three different types of static power converters for this application are described. Indirect ac converters with direct voltage link have been developed successfully in the past. For indirect ac converters with direct current link some problems are discussed. At last a self-commutated direct ac converter with suppressed dc link is presented.

Lightning protection on the South African electrified railways

After describing the lightning conditions which exist in the South African electrified-railway areas, the paper deals with the practical aspects of lightning protection as applied to electric locomotives, electric motor-coaches, overhead track-equipment and traction substations associated with 3 000-volt d.c. electrified systems. A brief history of the early difficulties experienced and the measures taken to overcome them is given, and Tables are included indicating the actual results obtained from various protective devices. Finally, the author's conclusions are appended as to the most satisfactory means of protecting each section of a 3 000-volt d.c. electrified system.No account is taken of lightning effects on the extra-high-voltage transmission lines associated with the substation supplies as this subject is common to all high-voltage transmission systems and has been covered in other papers.

Electric Motor Coach Trains

Electric Motor Coach Trains