B. Bertoldi, Marcio Moura Bridon Junior, M. S. Dall’Asta, Marcos Paulo Mocellini, Greidanus Mateo Daniel Roig, A. Kirsten, M. Heldwein
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引用次数: 4
摘要
发光二极管(led)的生命周期需要一个强大而可靠的驱动器,因为组件可能会对照明系统的寿命产生影响,这是一个不希望出现的情况。此外,LED串可以出售不同的负载可能性。这就要求转换器元件采用一般化和超大化的设计方式。因此,较大的元件导致损耗增加,主要是在半导体方面。在最后一种情况下,正向电压降和电阻通常相对于它们的电压阻断能力而增加。这项工作提出了一个稳态和动态建模的SEPIC转换器工作在不连续传导模式(DCM)为LED照明应用,考虑到非理想。仿真和硬件在环结果验证了所推导的动态和稳态模型,并给出了一个DCM PFC SEPIC整流器应用,该整流器从220 V-60 Hz电网驱动72 V-100 W LED灯。
A Non-Ideal SEPIC DCM Modeling for LED Lighting Applications
The life cycle of the Light Emitting Diodes (LEDs) requires a robust and reliable driver since the components may have influence in the lifetime of the lighting system, which is an undesirable situation. In addition, LED strings can be sold for different loads possibilities. This requires the converter components to be designed in a generalized and oversized way. As a consequence, sizable components lead to increased losses mainly in the semiconductors. In the last ones, the forward voltage drops and resistances typically increase relatively to their voltage blocking capacity. This work presents a steady state and dynamic modeling of a SEPIC converter operating in Discontinuous Conduction Mode (DCM) for LED lighting applications, considering non-idealities. Simulations and Hardware-in-the-Loop results are presented to validate the derived dynamic and steady-state models as well as to present a DCM PFC SEPIC rectifier application driving a 72 V-100 W LED lamp from a 220 V-60 Hz grid.