Open AccessActive Speed Compensation Method of Direct Torque Control System and Stability Analysis
Author(s) -
Rui Li,
Chaonan Tong,
Xu Yang
Publication year - 2014
Publication title -
advances in mechanical engineering/advances in mechanical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 40
eISSN - 1687-8140
pISSN - 1687-8132
DOI - 10.1155/2014/971286
Subject(s) - control theory (sociology) , torque , compensation (psychology) , observer (physics) , direct torque control , rotor (electric) , computer science , controller (irrigation) , control system , stall torque , induction motor , control engineering , engineering , control (management) , voltage , physics , psychology , artificial intelligence , psychoanalysis , electrical engineering , thermodynamics , mechanical engineering , agronomy , quantum mechanics , biology
By analyzing characteristics of the DTC (direct torque control) system in electrical driving system, a shortcoming of the classical DTC method is to point out that it is unable to decouple the mutual interference between torque and speed, so that when a running asynchronous motor subjected to an instantaneous impact load, rotor speed and its deviation appears excessive fluctuations that can not be quickly restored to the initial set value. In this research, under conditions that without sensors for measuring load torque and rotor speed, to an electrical drive systems contains DTC devices, a novel ASCC (active speed compensation control) method is proposed based on ADRC (active disturbance rejection control) theory, on account of DTC model of asynchronous motor, a multiobjective observer is designed to regulate both the speed and the torque, and a proof of asymptotic stability that related this new control systems with the observer is made by theoretical deduction. Finally stimulating results show that this method can overcome the shortcomings of classical DTC system and greatly enhance the ability of the high-speed driving system to deal with unexpected impact loads