SMPS中非线性电感自热诱导不稳定性的案例研究。

Daniele Scirè, Giuseppe Lullo, Gianpaolo Vitale
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引用次数: 0

摘要

本文提出了一个案例研究,表明SMPS中功率电感的非线性运行会引起控制系统的不稳定,导致电感过热超过其允许温度并达到最大电流的过高峰值。案例研究是由一个商用铁氧体电感执行的同步升压转换器,包括一个控制系统来调整占空比,确保恒定的输出电压。热瞬态由时域波形和热图像描述。
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Self-Heating Induced Instability of a Non-Linear Inductor in a SMPS: a Case Study.
This paper proposes a case study to show that the non-linear operation of a power inductor in a SMPS can induce instability of the control system leading to overheating of the inductor beyond its allowable temperature and to an excessive peak of the maximum current. The case study is performed by a commercial ferrite inductor employed in a synchronous boost converter encompassing a control system to adjust the duty cycle, assuring a constant output voltage. The thermal transient is described by the time domain waveforms and thermal images.
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