Chattering Reduction on Low-Speed Indirect Field Oriented Control Induction Motor Using Second Order Sliding Mode Control

Abstract

Indirect Field Oriented Control is commonly used to control induction motors by allowing separate control of the magnetic flux and torque. However, the changes in motor parameters and load torque to be affecting system stability and performance. To mitigate this issue, a sliding mode control was added to ensure robustness and stability. However, this caused chattering, which can reduce efficiency. A Second-Order Sliding Mode Control was developed to reduce chattering while maintaining system stability and robustness. Lyapunov system stability analysis was also implemented to ensure robustness. The results showed that the Super Twisting Algorithm had a good performance. Meanwhile, Second-Order Sliding Mode Control reduced the chattering up to 2.89 var. This was achieved by maintaining a steady error up to 0.1% at the set point 100 rpm without load. It was also able to retain robustness against changes the changes in load values up to 1.3 N m, even under transient and dynamic conditions.