摘要
针对弱磁阶段电机转矩下降的问题,在弱磁阶段电压控制策略的基础上,通过适当的选择漏感,提出了一种简化的电压控制策略。采用该方法能够使电机在整个弱磁阶段输出转矩保持最大,并确保非理想磁场定向条件下的转矩和升速性能。利用MADAB建立感应电机驱动系统模型仿真,将仿真结果与传统的弱磁控制进行比较,可以看到转矩性能较传统的方法有20％的提高,证实了此方法的可行性。
A novel field weakening scheme for electric vehicles induction motor drive system is presented, which gives a solution to torque decreasing problem during field weakening region. This scheme adopts voltage control strategy, and develops it further by choosing proper leakage inductance, which simplifies the control scheme. The proposed algorithm guarantees producing the maximum torque over the entire field weakening region and ensures the torque and speed-rising capability under imperfect field orientation conditions. Simulation results for electric vehicles induction motor drive system confirm the validity of the proposed algorithm. Compared to the conventional field weakening method, the proposed scheme can give a 20% torque capability increase.
出处
《电机与控制学报》
EI
CSCD
北大核心
2005年第5期452-455,460,共5页
Electric Machines and Control
关键词
感应电机
弱磁
转矩最大
非理想磁场定向
induction motor
field weakening
torque maximum
imperfect field orientation
