摘要
为加快电动汽车在负载量变化时所表现出来的电量响应速率,降低执行电动机控制指令所需的电能消耗量,设计基于分段输出的电动汽车电机PWM占空比控制系统;根据带存贮电容功率变换器的连接状态,调试功率变换器驱动电路、档位与油门给定输入电路的响应形式,联合DSP控制板与软启动模块,确保滑模转矩控制器不出现过量负载的情况,从而将电动汽车电动机控制系统的核心设备元件组合起来,完成硬件应用环境的搭建;在此基础上,研究PWM占空比控制原理,利用开关磁阻电机数学模型,确定脉冲行为成因,并将整个脉冲行为区间规划成多个分段结构,完成基于分段PWM占空比输出电动机控制行为分析,结合各级应用设备,实现电动汽车电动机控制系统的设计;实验结果显示,在分段PWM占空比输出原理的作用下,无论负载量增大或减小,电动汽车所表现出来的电量响应速率均能保持相对较高的数值水平,能够将电动机控制指令执行所需的电能消耗量保持在理想数值区间之内,提升电动汽车电机的电能利用率。
In order to speed up electric quantity response rate of electric vehicle when load changes,and reduce the required electric energy consumption to execute motor control instruction,a control system of electric vehicle motor with pulse width modulation(PWM)duty cycle based on segmental output is designed.According to the storage capacitor power converter connection status,the power converter drive circuit,gear and throttle response forms of the given input circuit are debugged,which joints the DSP control board and soft start module,the sliding mode of excess load torque controller is ensured not to happen,which will be the core of the electric motor control system equipment components together,and the hardware construction of the application environment is completed.On this basis,the principle of PWM duty ratio control is investigated,the pulse behavior causes are determined by using the mathematical model of switched reluctance motor,and the whole pulse interval is divided into multiple block structures,the output motor is completed based on PWM duty ratio control behavior analysis,combined with the various applications,the design of the control system of the electric car motor is realized.Experimental results showed that,based on the segmented PWM duty cycle control principle,whether the action of load increases or decreases,the electric vehicle power can maintain the response rate of relatively high value level,and the electricity consumption for the motor control instruction execution can keep in ideal numerical range,effectively improve the electric car motor power utilization.
作者
杨立英
刘晓敏
YANG Liying;LIU Xiaomin(College of Applied Technology,Jilin University,Changchun 130022,China)
出处
《计算机测量与控制》
2022年第9期107-112,共6页
Computer Measurement &Control
