中文摘要：

为了研究高速电主轴动态数学模型中耦合回路对高速电主轴负载特性的影响,根据控制理论的不变性原理,在高速电主轴给定电流和反馈电流的偏差处引入外部解耦支路来消除耦合电压的影响,研究解耦后高速电主轴的励磁电流和转矩电流在负载变化时对主轴磁通、电磁转矩以及负载特性的影响方式,并利用高速电主轴性能测试试验平台进行负载特性测试。理论分析和试验结果表明：高速电主轴的解耦效果会直接影响主轴磁通的稳定性和转矩电流对负载的线性跟踪能力,并通过不同频率下机械特性曲线的平行度、电磁转矩脉动程度、主轴的载荷能力、功率因素和效率等特性参数直接体现。因此,可以根据包含上述特征信息的机械特性曲线、功率因素曲线和效率曲线的变化趋势,判断高速电主轴的实际解耦效果,并预测高速电主轴在该控制方式下的动态性能。

英文摘要：

To study the impact of coupling circuits in high speed motorized spindle＇s dynamic mathematical model on load characteristics of the spindle,according to invariance principle of control theory,external decoupling branches is introduced into the point where the difference between reference current and feedback current of the high speed motorized spindle is,to eliminate the impact of coupling voltage,and then the impact way of excitation current changes and torque current changes on the spindle＇s flux,electromagnetic torque,and load characteristics are studied when the load varies.Meanwhile,the load characteristics are tested on the test platform of high speed motorized spindle.Theoretical analysis and experimental results show that the decoupling effect of high speed motorized spindle directly affects the stability of the spindle＇s flux and the linear tracking ability of the torque current on load,which is reflected by the parallelism of mechanical characteristic curve under different frequencies,the pulse level of electromagnetic torque,the load capacity of the spindle,power factor,efficiency and other parameters.Therefore the spindle＇s actual decoupling results and dynamic performance under the control mode can be judged and forecasted,according to the trends of mechanical characteristic curve,power factor curve and efficiency curve.