Indirect vector control induction motor drive performance under low speed

الملخص EN

An indirect vector controlled induction motor drive performance is poor with two—level inverter under low speed operation.

The reduction in performance and peak value of torque is mainly due to the non-linearity caused by stator voltage drop and inverter.

To overcome these problems three-level inverter used instead of optimized controllers (fuzzy, neural etc.) in indirect vector control.

Space vector modulation (SVM) method is employed to control two-level and three-level inverter.

A simplified space vector modulation technique is implemented for three-level inverter to reduce the computational difficulties unlike conventional SVM method.

In this simplified method, the three-level space vector diagram is decomposed into six two-level space vector diagrams.

The performance of induction motor drive is compared using the three-level inverter and two-level inverter under different operating conditions under low speed operation.