针对异步电机三电平中点钳位(Neutral point clamped,NPC)整流–逆变驱动系统的高性能高效控制,搭建了三电平整流–逆变系统的预测与损耗模型,构建了包含中点电压平衡与损耗优化的代价函数,提出了一种基于序列并行结构的无权重系数模型...针对异步电机三电平中点钳位(Neutral point clamped,NPC)整流–逆变驱动系统的高性能高效控制,搭建了三电平整流–逆变系统的预测与损耗模型,构建了包含中点电压平衡与损耗优化的代价函数,提出了一种基于序列并行结构的无权重系数模型预测控制.策略在传统的序列模型预测控制中引入了直流母线中点电压和变换器开关频率控制,构建了包含多个控制目标的统一代价函数.根据整流–逆变系统在运行中对各控制目标的实际需求,将代价函数中的多个控制目标分为主要和次要控制目标并归类为两个序列优化集,对不同的序列集进行顺序优化.在相同的序列集内部,采用自适应并行寻优来选择最优开关状态,保证了同级序列内各控制目标的同步优化,避免了权重系数的设计.仿真和实验结果验证了该方法具有良好的控制性能和参数鲁棒性,并能有效控制中点电压波动和降低系统损耗.展开更多
针对小功率通用变频器对低成本和小型化的需求,三菱电机开发了集整流、逆变和制动功能于一体的双列直插式封装-整流逆变制动(Dual In Line Package-Converter Inverter Brake,简称DIP-CIB)模块。在此详细介绍了DIP-CIB模块的内部电路、...针对小功率通用变频器对低成本和小型化的需求,三菱电机开发了集整流、逆变和制动功能于一体的双列直插式封装-整流逆变制动(Dual In Line Package-Converter Inverter Brake,简称DIP-CIB)模块。在此详细介绍了DIP-CIB模块的内部电路、半导体硅片技术、封装技术,以及如何配合专用的HVIC来实现通用变频器的小型化设计。展开更多
Applications of electric vehicles need to build a large number of charging stations. The electric vehicle charging stations communicate with the grid. In V2G （vehicle to grid） mode, electric vehicles can be used as ...Applications of electric vehicles need to build a large number of charging stations. The electric vehicle charging stations communicate with the grid. In V2G （vehicle to grid） mode, electric vehicles can be used as energy storage units and transfer power to the grid. The electric vehicles charge at night to reduce the cost and the grid load, simultaneously to fill the valley. When grid load increases, electric vehicles＇ batteries discharge to the grid to improve the stability of the grid. As distributed storage units, electric vehicles are important components of the smart grid. In this paper, the three-phase PWM （pulse width modulation） rectifier used for smart charging and discharging system of electric vehicles are analyzed and designed. This paper includes the principle of PWM rectifier-inverter and direct current control strategy. Also, the SVPWM （space vector pulse width modulation） and system design of three-phase PWM rectifiers are analyzed. A 10 kW prototype is developed. Simulation and experiment results show that the three-phase PWM rectifiers reach the unit power factor. From the experimental results, PWM rectifier implements the sinusoidal grid current and achieves the unit power factor.展开更多
文摘针对异步电机三电平中点钳位(Neutral point clamped,NPC)整流–逆变驱动系统的高性能高效控制,搭建了三电平整流–逆变系统的预测与损耗模型,构建了包含中点电压平衡与损耗优化的代价函数,提出了一种基于序列并行结构的无权重系数模型预测控制.策略在传统的序列模型预测控制中引入了直流母线中点电压和变换器开关频率控制,构建了包含多个控制目标的统一代价函数.根据整流–逆变系统在运行中对各控制目标的实际需求,将代价函数中的多个控制目标分为主要和次要控制目标并归类为两个序列优化集,对不同的序列集进行顺序优化.在相同的序列集内部,采用自适应并行寻优来选择最优开关状态,保证了同级序列内各控制目标的同步优化,避免了权重系数的设计.仿真和实验结果验证了该方法具有良好的控制性能和参数鲁棒性,并能有效控制中点电压波动和降低系统损耗.
文摘针对小功率通用变频器对低成本和小型化的需求,三菱电机开发了集整流、逆变和制动功能于一体的双列直插式封装-整流逆变制动(Dual In Line Package-Converter Inverter Brake,简称DIP-CIB)模块。在此详细介绍了DIP-CIB模块的内部电路、半导体硅片技术、封装技术,以及如何配合专用的HVIC来实现通用变频器的小型化设计。
文摘Applications of electric vehicles need to build a large number of charging stations. The electric vehicle charging stations communicate with the grid. In V2G （vehicle to grid） mode, electric vehicles can be used as energy storage units and transfer power to the grid. The electric vehicles charge at night to reduce the cost and the grid load, simultaneously to fill the valley. When grid load increases, electric vehicles＇ batteries discharge to the grid to improve the stability of the grid. As distributed storage units, electric vehicles are important components of the smart grid. In this paper, the three-phase PWM （pulse width modulation） rectifier used for smart charging and discharging system of electric vehicles are analyzed and designed. This paper includes the principle of PWM rectifier-inverter and direct current control strategy. Also, the SVPWM （space vector pulse width modulation） and system design of three-phase PWM rectifiers are analyzed. A 10 kW prototype is developed. Simulation and experiment results show that the three-phase PWM rectifiers reach the unit power factor. From the experimental results, PWM rectifier implements the sinusoidal grid current and achieves the unit power factor.
