基于直流母线电压控制的无传感器感应电机驱动

Control Sensorless Induction Motor Drive Based on the DC-Link Voltage

大多数驱动电机的无传感器算法是基于电动机电流和电压的电气变量为数学模型。因此,这些变量的准确性很大程度上影响了电机驱动的性能。由于电压源逆变器的空间矢量脉冲宽度调制的低输出电压容易导致电机在低速范围内误差大,针对这个问题,文中提出了基于可变的直流母线电压作为一种高性能控制策略来克服无传感器感应电机的上述问题,并通过模拟仿真验证了所提出的策略。

Most sensorless algorithms for a motor drive are based on a mathematical model including motor current and voltage. Therefore, the accuracy of these variables greatly influences the performance of the sensorless motor drive. As the output voltage of the space vector pulse width modulation of the voltage source inverter in a low-output voltage command is easy to cause error-prone in the motor＇s low-speed range. So this article proposes a variation of the dc-link voltage as a high performance strategy for overcoming the above problem. The strategy is verified through simulatiorL