This work investigates an injection-locked power oscillator inductively coupled to an external resonator for wireless power transfer. The system allows a high transfer efficiency, while ensuring a constant oscillation frequency versus the coupling factor, unlike free-running implementations. An analytical formulation provides insight into the impact of the coupling factor on the locked-operation ranges. Two types of qualitative behavior, delimited by a codimension-two bifurcation, are distinguished. The investigation is extended to a Class-E oscillator at 13.56 MHz, analyzed with a new harmonic balance (HB) method that provides the family of locked-solution curves in a single simulation. Very good agreement is obtained with the measurement results.

中文翻译：

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耦合到外部谐振器的注入锁定振荡器的非线性分析


这项工作研究了一种电感耦合到外部谐振器的注入锁定功率振荡器，用于无线功率传输。与自由运行的实现不同，该系统具有高传输效率，同时确保振荡频率与耦合因子的关系恒定。分析公式可以深入了解耦合因子对锁定操作范围的影响。区分了由余维二分叉界定的两种类型的定性行为。该研究扩展到 13.56 MHz 的 E 类振荡器，并使用新的谐波平衡 (HB) 方法进行分析，该方法在单次仿真中提供了一系列锁定解曲线。与测量结果非常一致。