交流伺服系统高精度电流矢量控制

针对电机转速的变化会导致系统对直轴电流、交轴电流的控制精度下降的问题,提出一种新的电流矢量解耦控制线性化补偿方案。在对永磁同步电机进行理想化处理的基础上,建立了永磁同步电机数学模型及控制模型,设计了电流矢量控制方法程序流程图,并在实验环境下搭建永磁同步电机调速系统的实验平台,采用电流霍尔传感器及电压传感器分别对电机的两相电流、直流母线电压进行测量。测试结果表明:随着转速的升高,补偿后id精度明显提高,提高了电机电流的解耦控制性能。

High-Accuracy Current Vector Control of AC Servo System

Focused on the problem that the control accuracy of the d-axis currents and quadrature axis will descend with the varying of the motor speed, a new kind of linearization compensating method of current vector decoupling control is proposed. Based on the idealized dealing with permanent magnet synchronous motor （PMSM）, the mathematical models and control models are established, and the program flow chart of current vector control method is designed. Then a speed control system of PMSM is established in the test environment, two phase motor currents and the DC voltage are measured separately by current sensors and voltage sensor. The experiment result proves that after compensating with the growth of the motor speed, the accuracy of id is increased obviously so that the decoupling control performance of motor currents is improved effectively.