内置式永磁容错电机起动发电系统研究

发布时间：2018-02-25 20:17

本文关键词： 永磁容错起动发电机恒转矩弱磁控制容错控制模拟平台　出处：《南京航空航天大学》2016年硕士论文　论文类型：学位论文

【摘要】：近年来,多电及全电飞机发展迅速,使得航空电源系统在功率水平、电能品质及可靠性等方面的要求越来越高,内置式整体起动发电系统则日益成为多电航空系统中的研究热点。起动发电系统是基于电机的可逆工作原理,电机在电动运行时作为发动机的起动机,在发电运行时作为发动机的负载,给其他电气类负载提供电源。永磁容错电机兼备高功率密度及高可靠性的特点,是内置式起动发电机的有力竞争者。本文介绍了内置式永磁容错电机起动发电系统的整体结构,并根据永磁容错电机本体的特性建立了其数学模型;针对航空发动机的起动转矩特性,给出了电动运行时的恒转矩起动方案;利用电机大电感的特点,在分析了发电控制原理的基础上,提出了直轴电流(Id)解析法弱磁控制以实现宽转速范围内的弱磁恒压发电;基于电机磁隔离的特点和三相四桥臂的电路拓扑,以保证故障后的电机定子磁场为幅值不变的圆形旋转磁场为目的,结合SVPWM算法提出了单相故障后利用第四桥臂补偿的容错控制策略。在理论分析的基础之上,利用仿真分析软件MATLAB建立了永磁容错电机起动发电系统的仿真模型,对各控制算法进行仿真分析及验证。本文设计并搭建了内置式永磁容错电机起动发电系统的模拟实验平台。该实验平台的硬件主要包含控制电路及主功率电路两个部分。控制电路的核心芯片采用TI公司的数字信号处理器TMS320F2812,主功率电路的功率器件采用三菱公司的IPM模块。系统软件算法设计采用C语言,主要编写了恒转矩起动程序段、弱磁发电控制算法程序段、容错控制算法程序段等。在软硬件兼具的基础上,对永磁容错电机起动发电系统进行软硬件联调。实验结果与仿真结果及理论分析相符,验证了系统控制策略的有效性。
[Abstract]:In recent years, with the rapid development of multi-electric and all-electric aircraft, the requirements of aeronautical power system in power level, power quality and reliability are becoming higher and higher. The built-in integral starting power generation system is increasingly becoming a research hotspot in multi-electric aeronautical systems. The starting power generation system is based on the reversible working principle of the motor, and the motor is used as the starting motor of the engine when it is in electric operation. As the load of engine during the operation of power generation, it provides power to other kinds of electrical load. Permanent magnet fault-tolerant motor has the characteristics of high power density and high reliability. This paper introduces the whole structure of starting generation system of built-in permanent magnet fault-tolerant motor and establishes its mathematical model according to the characteristics of permanent magnet fault-tolerant motor. According to the starting torque characteristic of aero-engine, the starting scheme of constant torque is given, and the principle of power generation control is analyzed based on the characteristics of large inductance of motor. Based on the characteristics of magnetic isolation of motor and the circuit topology of three-phase four-bridge arm, an analytical method of weak magnetic field control is proposed to realize the constant voltage generation of weak magnetic field in the wide speed range, which is based on the characteristics of magnetic isolation of the motor and the circuit topology of the three-phase four-arm. In order to ensure the circular rotating magnetic field with constant amplitude of stator magnetic field after fault, a fault-tolerant control strategy with 4th leg compensation after single-phase fault is proposed in combination with SVPWM algorithm. Based on the theoretical analysis, a fault tolerant control strategy is proposed. The simulation model of starting generation system of permanent magnet fault-tolerant motor is established by using simulation analysis software MATLAB. This paper designs and builds a simulation experiment platform for the built-in permanent magnet fault-tolerant motor starting generation system. The hardware of the platform mainly consists of control circuit and main power circuit. The core chip of the control circuit is TMS320F2812, and the power device of the main power circuit is the IPM module of Mitsubishi Company. The software algorithm of the system is designed with C language. The program segments of constant torque starting program, weak magnetic generation control algorithm, fault-tolerant control algorithm and so on are mainly compiled. On the basis of both hardware and software, The hardware and software combination of PMSM starting generation system is carried out. The experimental results are in agreement with the simulation results and theoretical analysis, and the effectiveness of the control strategy is verified.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V242

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