Е-Публикации
Технически университет - София

Abstract: This paper presents a tolerance analysis of a ZETA DC-DC converter, focusing on the influence of inductance variation on the system’s frequency and dynamic response. Simulations were performed in MATLAB Simulink for three values of the main inductor: the calculated (17 µH), a standard lower (15 µH), and a standard higher value (22 µH). Harmonic analysis was conducted for each case to evaluate current ripple, stability, filtering effectiveness, and system response across a wide frequency range. The results demonstrate that deviations from the nominal inductance significantly impact electromagnetic compatibility and transient behavior. The calculated 17 µH value provides the optimal balance between efficiency, stability, and dynamic performance. The findings emphasize the importance of pre-design tolerance analysis when selecting commercially available components to ensure the reliable operation of ZETA converters in power-sensitive applications.

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