This paper presents the speed control of a separately excited DC motor using Neural Network (NN) controller in field weakening region. In armature control, speed controller has been used in outer loop while current co...This paper presents the speed control of a separately excited DC motor using Neural Network (NN) controller in field weakening region. In armature control, speed controller has been used in outer loop while current controller in inner loop is used. The function of NN is to predict the field current that realizes the field weakening to drive the motor over rated speed. The parameters of NN are optimized by the Social Spider Optimization (SSO) algorithm. The system has been implemented using MATLAB/SIMULINK software. The simulation results show that the proposed method gives a good performance and is feasible to be applied instead of others conventional combined control methods.展开更多
A new compensation method and an algorithm for compensating for the commutation torque ripples of the trapezoidal EMF brushless DC motor are put forward. Simulation and experimental results show that this method is co...A new compensation method and an algorithm for compensating for the commutation torque ripples of the trapezoidal EMF brushless DC motor are put forward. Simulation and experimental results show that this method is correct and practical.展开更多
作动器系统作为直升机结构响应主动控制系统(active control of structure response, ACSR)执行元件的重要核心部件,其控制性能直接关系到振动的抑制效果。研制了一套基于永磁无刷直流电机驱动的离心式作动器原理样机,详细阐述了系统组...作动器系统作为直升机结构响应主动控制系统(active control of structure response, ACSR)执行元件的重要核心部件,其控制性能直接关系到振动的抑制效果。研制了一套基于永磁无刷直流电机驱动的离心式作动器原理样机,详细阐述了系统组成及工作原理,论述了作动器输出力频率、幅值和相位的调节方式,建立了偏心块的输出力方程,选取了MAXON公司生产的EC60 flat 411 678无刷电机作为驱动源。设计了作动器伺服控制系统,针对功率驱动中的隔离直流电源、自举二极管、自举电容、电流驱动能力及母线支撑电容等关键参数进行了详细设计。通过实验验证,电机转速误差最终被控制为1%以内,位置响应时间小于50 ms,振动抑制在0.001 5g(g为重力加速度)以下,取得了较好的控制性能,为离心式作动器系统在直升机平台的应用奠定了基础。展开更多
文摘This paper presents the speed control of a separately excited DC motor using Neural Network (NN) controller in field weakening region. In armature control, speed controller has been used in outer loop while current controller in inner loop is used. The function of NN is to predict the field current that realizes the field weakening to drive the motor over rated speed. The parameters of NN are optimized by the Social Spider Optimization (SSO) algorithm. The system has been implemented using MATLAB/SIMULINK software. The simulation results show that the proposed method gives a good performance and is feasible to be applied instead of others conventional combined control methods.
文摘A new compensation method and an algorithm for compensating for the commutation torque ripples of the trapezoidal EMF brushless DC motor are put forward. Simulation and experimental results show that this method is correct and practical.