中文摘要：

针对异步电机开环V/F控制系统低速性能差和轻载不稳定的问题，根据异步电机状态方程推导出一种新型电压矢量控制策略。该策略采用一种新颖的电压提升方法对电机定子电阻压降进行补偿，使电机磁链幅值保持恒定，并基于系统不稳定状态的深入分析，提出了一种提高系统稳定性的方法。在极低速情况下，通过对电机转矩进行提升以及对滑差进行补偿，使系统的低速性能和转速精度得到明显改善。与无速度传感器矢量控制算法不同的是，该文提出的方法是根据定子电压矢量定向对电流进行解耦，其不需要复杂的磁链观测运算，容易实现。实验结果表明，采用此方法在0.1 Hz满载情况下，电机能平稳运行。该系统的低速性能和转速精度得到了明显提升，并且系统的空载振荡得到了抑制，在整个工作范围内都能平稳运行。

英文摘要：

A novel voltage vector control method for induction motor is presented to improve the low speed performance and stability of open-loop system. The control scheme adopted a novel voltage boost method to compensate the stator resistor voltage drop keeping the magnitude of the stator flux constant. And through deeply research of the instability under light load condition, a stabilizing control method was proposed. Under very low speed condition, the performance had been greatly improved by boosting the torque and compensating the motor slip frequency. Different from vector control methods, all the compensation and regulation were based on stator voltage oriented synchronous rotation frame transformation, which avoided complicated flux linkage vector calculation and were simple to implement. The experimental results show that, by adopting the proposed method, the speed can be accurately controlled down to 5.3 r/min with rated load torque. Great improvement is achieved in the low speed performance and speed accuracy, and the system under no load condition is stabilized at the whole operating range.