中文摘要：

为了提高电动汽车电机驱动系统对参数摄动和负载扰动的鲁棒性,同时削弱滑模变结构控制（SMVSC）固有的抖振,将一种改进的滑模控制策略应用于永磁同步电机（PMSM）最大转矩电流比（MTPA）控制调速系统中。采用最大转矩电流比控制方法分配定子直轴、交轴电流,将他们与转矩的关系分别拟合为低阶多项式,提高了该方法的工程实用性;速度环采用基于变指数趋近律的滑模控制策略,选取积分滑模面,并将控制律连续化,有效地削弱了滑模控制系统固有的抖振。仿真与实验表明,所设计控制器提高了系统鲁棒性,具有优良的稳态、动态性能,适用于电动汽车电机驱动系统。

英文摘要：

An improved sliding mode variable structure control（SMVSC） strategy is introduced to permanent magnet synchronous machine（PMSM） maximum torque per ampere（MTPA） speed control system,in order to improve the system robustness against parameter perturbations and load disturbances for electric vehicle motor drive system,and meanwhile,alleviate intrinsic chattering resulting from sliding mode control.The stator d,q-axes currents were distributed with the MTPA control method,and their relationships to torque were separately fitted into low order polynomials,which made the method more practicable in engineering.An improved variable exponent reaching law based sliding mode control strategy was proposed in speed loop,and integral sliding surface and continuous control law were adopted,all of which effectively alleviate intrinsic chattering of the sliding mode control system.Simulation and experimental results demonstrate that the designed controller enhances system robustness and ensures good dynamic and static performances for electric vehicle motor drive system.