一种新型的矢量控制逆变器死区时间补偿

提出一种新型的基于两自由度内模电流控制死区时间补偿方案.首先,将逆变器死区时间引起的误差电压看成扰动,在s域中建立逆变器模型和电机动态逆电流模型.然后通过幅值和相位裕度来设计两自由度控制器.该方法没有增加硬件,因此具有结构简单,易于实现的特点.将该方法应用于矢量控制系统中,并搭建了仿真模型.仿真结果表明:所提出的两自由度内模控制器能对死区时间引起的误差电压进行补偿,进而消除了电流畸变.

Novel Compensation on Inverter Deadtime of Vector Control

A novel compensation dead time scheme based on two-degree-of-freedom current control was proposed.At first,the error voltage caused by dead time of inverter is regarded as disturbance,then the two-degree-of-freedom controller is designed using gain and phase-margin.The method has the advantage of simple structure and implement easily for no addition of hardware.The scheme was introduced in vector control,and the simulate model was designed.Simulation results indicate that the proposed controller can compensate the error voltage and eliminate the distort current.