矿用蓄电池电机车电机驱动及能量回馈系统的研究

发布时间：2018-04-06 06:17

本文选题：矿用电机车　切入点：异步电机　出处：《安徽理工大学》2017年硕士论文

【摘要】：矿用电机车是煤矿开采工作中主要的运输工具,它的运行性能关系到煤矿生产的效率和经济效益。传统的矿用电机车多采用直流电机作为驱动电机,但其有耗能严重、串电阻启动、体积大、维护成本高等缺点,为了调高电机车的起动速度慢和速度调节不平稳的性能以及改善其耗能严重的问题,本文以矿用蓄电池电机车电机驱动异步电动机为对象,运用成熟的直接转矩控制技术和电动汽车能量回馈技术对矿用电机车电机驱动的交流调速技术和制动能量回馈系统进行相应地分析与研究。本文在分析电机车的运行特性后,系统地分析了三相交流异步电动机的数学模型,同时对定子磁链影响因素以及电磁转矩的运行特性做出了简单地分析,以此作为直接转矩控制(DTC)策略选择的理论依据,在DTC控制策略中,相比六扇区矢量空间表的控制,采用十二扇区细分的DTC交流调速控制方式性能更优化。本论文还详细介绍了电机车电机驱动的四象限的运动特性,分析了电机车电动状态和发电状态的运行特性,同时还分析了电机车电机驱动的能量再生原理以及再生条件。在能量回馈制动电路中同时还应用到了超级电容来储存能量,采用恒流闭环控制,通过双向DC/DC变换器实现能量的回馈与再利用,使得矿用蓄电池电机车的交流调速性能更优越,电机车的续航里程得到较大提升。论文对改进的DTC控制策略和电机车的制动能量回馈控制进行了Matlab仿真模型的搭建,验证了十二扇区细分的直接转矩控制策略的优越性,及电机车超级电容能量回馈控制系统可行性,同时验证了双向DC/DC变换器对超级电容工作时的恒流控制策略。本文以TMS320F2812 DSP数字信号控制芯片作为控制系统的核心处理器,设计了系统的硬件和软件,主电路采用了 IPM智能功率模块,系统的对电机车电机驱动DTC控制策略和能量回馈系统进行实验验证。
[Abstract]:Mine electric locomotive is the main transportation tool in coal mining, and its operation performance is related to the efficiency and economic benefit of coal mine production.Traditional mine electric locomotives use DC motor as drive motor, but it has some disadvantages, such as serious energy consumption, series resistance starting, large volume, high maintenance cost, etc.In order to improve the performance of slow starting speed and unsteady speed regulation of electric locomotives, and to improve the serious energy consumption of electric locomotives, this paper takes the asynchronous motor driven by the electric motor of mine battery electric locomotive as an object.Using the mature direct torque control technology and the energy feedback technology of electric vehicle, the AC speed regulation technology and braking energy feedback system driven by mine electric locomotive motor are analyzed and studied accordingly.After analyzing the running characteristics of electric locomotive, the mathematical model of three-phase AC asynchronous motor is systematically analyzed, and the influence factors of stator flux linkage and the operating characteristics of electromagnetic torque are analyzed simply.In the DTC control strategy, compared with the six sectors vector space table control, the performance of the DTC AC speed regulation control mode with 12 sectors subdivision is better than that of the six sectors vector space table control strategy.This paper also introduces the motion characteristics of the four quadrants of the electric locomotive motor in detail, analyzes the running characteristics of the electric state and the power generation state of the electric locomotive, and also analyzes the principle of energy regeneration and the regeneration conditions of the electric locomotive motor drive.At the same time, the super capacitor is used to store energy in the energy feedback braking circuit. The constant current closed-loop control is used to realize the energy feedback and reuse through the bi-directional DC/DC converter, which makes the AC speed regulation performance of mine battery locomotive more superior.Electric locomotive mileage has been greatly improved.In this paper, the improved DTC control strategy and the braking energy feedback control of electric locomotive are built by Matlab simulation model, and the superiority of the DTC strategy of the 12 sectors subdivision is verified.And the feasibility of the super capacitor energy feedback control system of electric locomotive. The constant current control strategy of bidirectional DC/DC converter for super capacitor operation is also verified.In this paper, the TMS320F2812 DSP digital signal control chip is used as the core processor of the control system. The hardware and software of the system are designed. The main circuit adopts the IPM intelligent power module.The DTC control strategy and energy feedback system for electric locomotive motor drive are verified by experiments.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD642

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