摘要
提出了Boost型功率因数校正的一种新的电流型控制方法,其控制结构与线性峰值电流控制、非线性载波控制、预测开关调制的控制结构相同。和传统的峰值控制、平均电流型控制相比,这种方法无需乘法器、无需检测输入电压、无电流环的稳定性问题。但其通过预测平均电流控制(PACC)执行不同的开关原理,扩大了连续导电模式的运行范围,没有低频振荡,带两个复位积分器的电路产生预测电流。仿真结果验证了该方法的可行性,能很好地在宽范围输入和负载变化下,获得单位功率因数,抗干扰能力强。
A new variation of current mode control for Boost power factor correction is presented. It follows the same control structure as that of the linear peak current mode control, the nonlinear carrier control and the predictive switching modulator, which have following advantages over conventional peak and average current mode PFC techniques： elimination of the controller multiplier, input voltage sensing circuits, unconditional stability of the current loop. However, it implements a different switching law by using a Predictive Averaged Current Mode Control （PACC） that extends the range of continuous conduction mode of operation and there are no sub - harmonic oscillations. The predictive current trajectory is generated by using the circuit with two reset integrators. Simulation results show that the proposed strategy works well and unity power factor can be achieved with wide input voltage and load current variation range.
出处
《电气应用》
北大核心
2007年第11期40-44,共5页
Electrotechnical Application
关键词
功率因数校正
预测平均电流控制
低频振荡
power factor correction predictive averaged current mode control sub-harmonic oscillations
