摘要
为了满足大功率牵引电动机在全速度范围内的快速转矩响应,并克服电机参数变化对系统的影响,提出了一种牵引电动机的直接转矩控制策略,低速时采用圆形磁链控制,以减小转矩脉动;高速时采用六边形磁链控制,以减小逆变器开关频率,并优化选择零电压矢量,采用速度和磁链容差切换的控制方式实现六边形磁链与圆形磁链的平滑过渡。仿真结果表明,该控制方法能够实现转矩的快速动态响应,保证了控制精度,在大功率交流调速中具有一定的参考价值。
In order to achieve fast torque response for high power asynchronous traction motors in full speed range, and overcome the influence of motor parameters changing on system, direct torque control（DTC） strategy was proposed. In the low-speed range, circular flux control was used for reducing the torque ripple and hexagon flux control for reducing switching frequency of inverter in the high-speed range. The choice of zero-voltage vector was optimized and the speed and flux tolerance switching control was used to ensure the smooth switching from hexagonal flux to circular flux. Simulation results show that this control method can achieve fast dynamic torque response and high accuracy of control. In the high power AC speed control system this method has a certain reference value.
出处
《微特电机》
北大核心
2010年第1期54-56,60,共4页
Small & Special Electrical Machines
基金
国家重点基础研究发展计划资助(973计划
2007CB714702)
西南交通大学创新团队培育计划资助(2007IRT01)
