新型无刷电励磁直流电机操动机构控制系统研究

发布时间：2018-04-15 06:39

本文选题：40.5kV高压断路器 + 新型无刷电励磁直流电机　；参考：《沈阳工业大学》2017年硕士论文

【摘要】：为了提升高压断路器(High Voltage Circuit Breaker,HV-CB)运行可靠性及智能化操作,本文提出了一种应用于40.5kV HV-CB的新型电机操动机构(Motor Operating Mechanism,M-OM)控制系统,即新型无刷电励磁直流电机操动机构控制系统。本文主要对40.5kV HV-CB机械动态特性、电机结构及工作原理、电磁特性、驱动控制技术、及M-OM动态特性仿真等方面研究。并搭建样机硬件试验平台,进一步为HV-CB采用M-OM提供可靠理论依据。主要有以下方面:(1)分析M-OM机械运动模型,将HV-CB传动机构的直线运动转化成电机轴的旋转运动,分析HV-CB传动机构中的拉杆与驱动电机之间的运动对应关系。计算断路器运动负载折算到驱动电机转轴处的等效负载转矩特性,得到驱动电机在HV-CB分合闸操作过程中的等效负载特性、转轴转角等技术参数。(2)详细介绍了样机的物理结构,分析样机的工作原理,对此电机的磁化与电感特性进行了分析,在此基础上推算了转矩公式及矩角特性。通过对比分析,确定了三相不对称半桥电路更匹配样机的电机结构,并作为功率变换主电路。详细介绍了脉宽调制控制及角度控制两种控制方式。为样机控制系统的设计提供理论基础。(3)运用三维有限元方法分析样机特有的结构特点对电磁性能的影响,并确定了样机操动机构动作时的最优励磁电流。分析HV-CB样机操动机构分、合闸动态特性,得出样机操动断路器的平均合闸速度为3.15/s,平均分闸速度为4.83/s,满足40.5kV HV-CB操动机构的分合闸要求。(4)搭建了以TMS320F28335数据处理芯片为核心的样机操动机构控制系统硬件实验平台。设计了双闭环PID控制系统,并完成了软件程序编译。通过不同电压等级的样机空载实验,得到样机转速及电流数据。经过数据分析说明样机的性能良好,符合电机设计原理,验证了样机操动机构理论设计的正确性。
[Abstract]:In order to improve the reliability and intelligent operation of high voltage Voltage Circuit Breakerbus HV-CBs, this paper presents a new type of motor Operating mechanismM-OM-based control system applied to 40.5kV HV-CB, that is, a new brushless excitation DC motor operating mechanism control system.In this paper, the mechanical dynamic characteristics of 40.5kV HV-CB, the structure and working principle of the motor, the electromagnetic characteristics, the driving control technology, and the simulation of the M-OM dynamic characteristics are studied.And build the prototype hardware test platform to further provide a reliable theoretical basis for HV-CB to adopt M-OM.The main contents are as follows: 1) analyzing the M-OM mechanical motion model, transforming the linear motion of the HV-CB transmission mechanism into the rotating motion of the motor shaft, and analyzing the corresponding relation between the pulling rod and the driving motor in the HV-CB transmission mechanism.This paper calculates the equivalent load torque characteristics of the circuit breaker from the moving load to the driving motor shaft, obtains the equivalent load characteristic of the drive motor during the HV-CB switching operation, and introduces the physical structure of the prototype in detail, such as the technical parameters, such as the rotation angle of the shaft, and so on.The working principle of the prototype is analyzed, the magnetization and inductance characteristics of the motor are analyzed, and the torque formula and torque angle characteristic are calculated.Through comparison and analysis, the motor structure of the three-phase asymmetrical half-bridge circuit is determined to match the prototype, and it is used as the main circuit of power conversion.Two control methods, pulse width modulation control and angle control, are introduced in detail.This paper provides a theoretical basis for the design of the prototype control system. (3) the influence of the structural characteristics of the prototype on the electromagnetic performance is analyzed by using the three-dimensional finite element method, and the optimal excitation current of the prototype operating mechanism is determined.The dynamic characteristics of operating mechanism and closing of HV-CB prototype are analyzed.It is concluded that the average closing speed of the prototype operating circuit breaker is 3.15 / s and the average opening speed is 4.83 / s, which meets the 40.5kV HV-CB operating mechanism's closing requirements.) the hardware experimental platform of the prototype operating mechanism control system based on TMS320F28335 data processing chip is built.A double closed loop PID control system is designed, and the software program is compiled.The data of speed and current of prototype are obtained by no-load experiment of different voltage levels.The data analysis shows that the performance of the prototype is good and accords with the principle of motor design, and the correctness of the theoretical design of the prototype operating mechanism is verified.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM561;TM33;TP273

【参考文献】