Simulation study on the starting characteristics of a kind of improved direct torque control system

摘要

Analyzed working principle and starting process of asynchronous motor direct torque control system, in order to soive the problem of serious fluctuation of starting current in traditional control scheme, the author puts forward a new kind of starting method which can limit voltage value to achieve the goal of reducing fluctuation of the current by increasing zero voltage vectors during the of starting. The author has also carried on simulation study on the system, and the result of simulation study shows that this method is effectual.