Research on high-speed synchronous motor direct torque control

High-speed motor is increasingly used in ultra-high precision machining and high-performance machinery. It necessary to achieve closed-loop control of high-speed order realize control. The high-frequency characteristics have brought great difficulties for its realization performance the hexagonal flux direct torque (DTC) method that can reduce switching frequency power devices researched synchronous this paper. After adopting method, harmonics current be suppressed by an appropriate filtering method. same effect as conventional DTC still achieved. provides a basis application system.