Sliding Mode with Equivalent Control for Induction Motor Drive Based on Multi-Pulse VSC

Abstract

In this work, the application of the sliding mode equivalent control for an induction motor drive based 1 on a multi-pulse Voltage Source Converter is proposed. This is accomplished by transforming the squirrel-cage 2 induction motor mathematical model to the block control form. The equivalent control method is applied to the 3 sliding manifold where the voltages are obtained in stationary reference frame to control the angular velocity 4 of the motor. Also, a proportional-integral control is designed and applied to the motor represented in this 5 form, in order to make performance comparisons with the equivalent control method. Multi-pulse converters of 6 6, 12, and 84 pulses are used directly to feed the plant being controlled. The outcomes of using these power 7 electronics devices are used to perform comparisons among the velocity tracking performance, control voltages 8 in stationary reference frame, tracking errors, and rejection to external disturbances. Besides that, a dynamic 9 and steady-state analysis of the velocity tracking performance is executed. The energy profiles for the start-up, 10 torque variations, and steady-state are also obtained. Additionally, total harmonic distortion values are added. 11 All comparisons are carried out by using the established plan for the motor with and without the use of power 12 electronics converters and with both control algorithms. The obtained results demonstrate that the use of a 13 high-quality voltage source converter, along with a good control strategy allows a general improvement in 14 the overall system and a significant reduction in the energy used, whilst the controller complexity can be also 15 reduced.