新型单周控制软开关Boost-PFC变换器研究

Research on a novel One-cycle Control of Soft Switching ZCZVS Boost PFC Converter

单周控制是一种新型非线性控制策略,能够在一个周期内自动消除稳态和瞬态误差,动态响应快,适宜于PWM控制。该策略应用于PFC控制,能够很好地实现功率校正;开关管在零电压、零电流条件下工作,实现了软开关,因此功率器件开关损耗小。将单周控制和软开关技术一起引入Boost PFC,设计了一种新型单周控制软开关Boost PFC电路拓扑,其电路简单,控制也简单。仿真和实验证明,单周控制结合软开关应用于该新型Boost PFC变换器,实现了控制目标,取得了很好的效果。

One cycle control （OCC） is a novel nonlinear control method,one cycle controlled switch has the ability to remove automaticly the error of static state and instant state in one cycle,and its dynamic response is quick and applicable to PWM control.Applying the proposed method to PFC can achieve power factor correction.The soft switching converter turns on （turns off） under the zero-voltage or zero-current conditions,so the switching power losses is lower.OCC and the soft switching technology are imported to PFC.A novel OCC Boost PFC with the soft-switching is designed,the circuit and control are simple.Finally ,the experimental result is presented to determine the characteristics.