电力推进船舶中永磁电机直接转矩控制

Direct Torque Control in Permanent Magnet Motor of Electric Propulsion Ships

随着交流电机变频调速技术的发展,大功率永磁电机已成功应用于船舶电力推进系统中。通过对变频调速系统中直接转矩控制理论的分析,建立了基于传统开关表的直接转矩控制仿真模型。仿真结果表明,采用该技术的变频调速系统中,推进永磁电机的加速时间较快,同时能够满足船用大功率永磁电机在动态转矩响应方面的要求。

With the development of AC （alternating current） technique, larger power PMSM （permanent magnet synchronous motor） has been applied in the marine electric propulsion systems. By analyzing the theory of direct torque control （DTC） which used in the variable frequency regulation speed system, a simulation model of DTC based on the traditional switching table was established. The simulation results indicated that the speed up time of the pro- pulsion PMSM was very fast in the variable frequency regulation speed system used DTC technique. Meanwhile it could meet the requirement involved in the aspect of marine larger power PMSM dynamic torque response.