摘要
在深入分析双级矩阵变换器整流级调制算法和逆变级直接转矩控制策略的基础上,提出了采用双级矩阵变换器驱动异步电机直接转矩控制的策略。换流方式采用零电流换流的思想,即整流级换流前后,在逆变级插入零开关状态,可以保证整流级的零电流换流。此控制策略结合了双级矩阵变换器和直接转矩控制的优点,功率因数可调且具有良好的动静态性能。仿真结果验证了该控制策略的可行性和有效性,表明该策略具有与直流调速系统相媲美的调速性能。
After the modulation algorithm of the two-stage matrix converter rectifier stage and the control strategy of inverter direct torque were deeply analyzed, a control strategy that two-stage matrix converter drived induction motor direct torque was proposed in the paper. The thought of zero current switching was adopted as the commutation method, namely, zero current switching of rectifier stage could be insured by inserting short periods of zero switching states around the points at which the rectifier stage commuted. The advantages of two-stage matrix converter and the direct torque control were combined in this strategy to make power factor adjustable and be of good dynamic and static performance. The simulation results prove the feasibility and effectiveness of the control strategy and indicate that the control strategy has perfect speed modulation as the DC speed control system.
出处
《电源技术》
CAS
CSCD
北大核心
2011年第9期1166-1168,共3页
Chinese Journal of Power Sources
关键词
双级矩阵变换器
直接转矩控制
空间矢量调制
零电流换流
two-stage matrix converter
direct torque control
pace vector modulation
zero current commutation
