【作者】 李博；

【导师】 刘爱民；

【作者基本信息】 沈阳工业大学 ， 工程硕士（专业学位）， 2019， 硕士

【摘要】 为了提升高压断路器(High Voltage Circuit Breaker,HV-CB)运行可靠性及可控性,本文提出了一种适用于40.5kV CB-HV的新型电机操动机构控制系统,即线圈辅助励磁BLDCM(Coil-Assisted Excitation Brushless DC Motor,CAE-BLDCM)操动机构控制系统。本文主要对40.5kV CB-HV运动及负载特性、电机结构及工作原理、电磁特性、驱动控制技术、40.5kV CB-HV虚拟样机动态特性仿真等方面研究,并搭建电机硬件实验平台,设计控制电路PCB板、联机做40.5kV CB-HV合闸实验。主要研究工作如下:(1)建立并分析了CAE-BLDCM操动机构机械运动模型,将CB-HV侧机构直线运动转化成电机侧的旋转运动,分析驱动电机转角与CB-HV传动机构中的拉杆之间的运动关系。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CB-HV分合闸操作过程中的转轴转角、等效负载特性等技术参数。(2)针对CAE-BLDCM原理以及物理结构方面的内容,对电机的相关状况进行了分析介绍,并且针对BLDCM-CAE电感与磁链特性利用ANSYS软件进行仿真分析。详细介绍了电流斩波控制、电压斩波控制以及角度控制三种控制方式。为CAE-BLDCM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电机特有的结构特点对电磁性能的影响,确定中央励磁线圈的调磁与调速作用。利用ANSYS分析HV-CB电机操动机构分、合闸动态特性,利用ADAMS搭建HV-CB虚拟样机模型,通过仿真验证其合理性,符合40.5kV HV-CB技术参数要求。(4)搭建以DSP芯片为核心的BLDCM-CAE操动机构控制系统硬件实验平台,设计制作了线圈控制电路PCB板,升压电路以及电流检测电路PCB板,设计了双闭环PID控制系统。通过不同电压等级的电机空载实验,得到电机启动转速及电流等数据,在中央励磁线圈通入不同电流时,做联机HV-CB合闸实验操作,经过数据分析说明电机的性能良好,符合电机设计原理,验证了CAE-BLDCM操动机构设计理论的正确性以及中央励磁线圈通电的调磁与调速特性。更多还原

【Abstract】 In order to improve the reliability and controllability of High Voltage Circuit Breaker(HV-CB),this thesis has proposed a new motor operating mechanism control system for40.5kV HV-CB,namely coil assisted excitation BLDCM(Coil-Assisted Excitation Brushless DC Motor,CAE-BLDCM)operating mechanism control system.This thesis have made an intensive study on the 40.5kV HV-CB motion and load characteristics,motor structure and working principle,electromagnetic characteristics,drive and control technology,and simulation of 40.5kV HV-CB virtual prototype dynamic characteristics.And set up a motor hardware experiment platform,designed control circuit PCB board,and online 40.5kV HV-CB closing experiment was done.The main research contents of this thesis are as follows:(1)The mechanical motion model of the CAE-BLDCM operating mechanism was established and analyzed,and the linear motion of the HV-CB side mechanism was converted into the rotational motion of the motor side,and the motion relationship between the driving motor rotation angle and the rod in the HV-CB operating mechanism was analyzed.By calculating the equivalent load torque characteristic of the circuit breaker’s motion converted to the drive motor shaft,the technical parameters such as the rotation angle of the shaft and the equivalent load characteristics of the driving motor during the HV-CB opening and closing operation were obtained.(2)Aiming at the principle and physical structure of CAE-BLDCM,the related status of the motor were analyzed and introduced,and the characteristics of inductance and flux were simulated and analyzed by ANSYS software.The three control methods of current chopper control,voltage chopper control and angle control were introduced in detail.It provides a theoretical basis for the design of CAE-BLDCM control system.(3)The three-dimensional finite element method was used to analyze the influence of the unique structural characteristics of the motor on the electromagnetic performance,and the magnetic regulation and speed regulation of the central excitation coil are determined.The ANSYS was used to analyze the dynamic characteristics of the HV-CB motor operating mechanism.The HV-CB virtual prototype model was built by ADAMS,and the rationality is verified by simulation and it satisfies the requirements of 40.5kV HV-CB technicalparameters.(4)The hardware experiment platform of CAE-BLDCM operating mechanism control system with DSP28335 chip as the core was built.The coil control circuit PCB board,boost circuit and current detection circuit PCB board were designed and fabricated.The double closed-loop PID control system was designed.Through no-load experiment of the motor with different voltage levels,the data of starting speed and current of the motor were obtained.When the central electric excitation coil was fed with different currents,the on-line HV-CB closing experiment operation has done.The data analysis shows that the performance of the motor is good and conforms to the design principle of the motor.The correctness of the CAE-BLDCM operating mechanism design theory was verified.And the magnetic regulation and the speed regulation of the central electric excitation coil were proved.更多还原