电动车辆感应牵引电机DTC驱动系统的设计和开发

研究和开发电动汽车三相感应电机驱动装置的直接转矩 (DTC)驱动控制系统 .采用低成本数字信号处理器 ,通过软硬件模块化结构 ,运用程序测试实现感应电机无速度传感器直接转矩全数字实时控制方案的可行性 .通过测试程序实验证明整个控制系统的硬件接口功能正常和软件的可实现性 .测试电机时 ,采用基于空间矢量脉宽调制的变频控制技术 ,电机能够正常运行 ,但以18r/min运行时 ,转矩脉动大 .在已建立的感应电机无速度传感器直接转矩控制理论基础上 ,展开其在电动汽车上的应用研究 ,侧重在转矩响应的快速性、平滑性和稳定性 ,这有利于提高电动车辆的动力性和经济性 .

Design and Development of the DTC Induction Motor Drive for Electric Vehicle

The design and development of the traction controller for electric vehicle is introduced, which is based on the induction motor. This drive is developed by using a digital signal processor at low cost and carried out with the module design concept of both software and hardware. Nevertheless, a scheme of the sensorless direct torque control is based on the developed hardware, of which the feasibility is tested by a trial program. Additionally, both the interface function of the drive hardware and the feasibility of its software are proved to be good by the trail programs. A test motor can run about 18?r/min by a variable frequency program with the space vector pulse width modulation technology, of which the torque is visible pulsatile. In this presentation, based on the theoretical approach, the sensorless torque control is to be studied and applied to electric vehicles, of which the quick, smooth and stable torque response is emphasized because it quite benefits improving the drive performance of electric vehicles.