当增加力量因素修正(陆军) 电路与大规模负载变化工作时,因为传统的控制器和电感器电流模式,引起更高全部的泛音失真和一个更低的力量因素是容易的。解决这个问题,这份报纸建议一个陆军控制系统,它能由使用责任周期前馈控制控制理论完成光滑的切换与负担变化操作直到 1 000 W 模式。在控制系统的下一个时期的责任周期在当前的周期被预先估计,它提高广告刺绣花样和切换的频率的速度,并且把设备的费用和卷归结为某程度。系统去耦和输入电压的前馈控制的介绍极大地改进系统表演。理论模拟和试验性的结果证明建议计划的优点。
When boost power factor correction (PFC) circuit works with large scale load fluctuations, it is easy to cause a higher total harmonic distortion and a lower power factor because of traditional controllers and inductor cur- rent mode. To solve this problem, this paper proposes a PFC control system, which can operate with load fluctuations up to 1 000 W by using duty cycle feed-forward control theory to achieve smooth switching mode. The duty cycles in the next period of the control system are pre-estimated in the current cycle, which enhances the speeds of AD samplers and switching frequency, and reduces the cost and volume of the equipment to some extent. Introductions of system decoupling and feed-forward of input-voltage greatly improve the system performance. Both theoretical simulation and experimental results prove the advantage of the proposed scheme.