Abstract

Triode-based circuits are still the less expensive and more reliable high power sources for industrial applications between 13.56 and 40.68 Mhz. Among them, self-excited oscillators feature the lower cost but with a frequency stability preventing them to address all ISM frequencies and applications. This article demonstrates the possibility to model numerically self-excited oscillators with power triodes using a class-C practical circuit. Advantages over existing analytical calculations and graphical derivations are shown. A method is proposed to evaluate the frequency stability in presence of internal imperfections and external perturbations. These tools offer the possibility to design and analyze more efficiently this family of oscillators especially for demanding applications regarding frequency stability.

摘要

对于 13.56 至 40.68 Mhz 之间的工业应用，基于三极管的电路仍然是更便宜、更可靠的高功率电源。其中，自激振荡器的特点是成本较低，但频率稳定性使其无法满足所有 ISM 频率和应用。本文演示了使用 C 类实用电路对带有功率三极管的自激振荡器进行数值建模的可能性。显示了优于现有分析计算和图形推导的优势。提出了一种在存在内部缺陷和外部扰动的情况下评估频率稳定性的方法。这些工具提供了更有效地设计和分析该系列振荡器的可能性，特别是对于频率稳定性要求严苛的应用。