This article introduces an adaptive self-tuned controller IC for resonant wireless power transfer (RWPT) transmitters. The controller IC comprises an on-the-fly very-high-frequency tracking hardware with high resolution and an independent high-resolution digital pulsewidth modulator (PWM)-based (HR-DPWM) current programmed control. These facilitate precise frequency generation as well as adaptive tuning of the reactive components in the matching network, which translate into tight current/power regulation capabilities while retaining optimized power transfer conditions on the transmitting side. The controller IC enables to effectively disengage the power-delivery capabilities from the variations of the resonators, electrical circuits, and wireless medium. The controller core is based on a fully synthesizable digital architecture that has been realized through HDL tools, and several key building blocks have been developed and described in detail: a delay-line-based phase detector, high-resolution digital frequency synthesizer, and HR-DPWM. To fully exploit the benefits of digital electronics, reduce power consumption, and save area, the digital core of the controller has been designed completely through asynchronous architecture, eliminating the need of high-speed clock and its related hardware. The mixed-signal controller IC has been designed, implemented, and fabricated in 0.18-μm 5-V CMOS process, resulting in effective silicon area of 0.6 mm 2 . To demonstrate the mixed-signal controller IC in closed-loop operation of a wireless power system, an experimental 20-W resonant capacitive-based WTP system has been designed and validated. The effectiveness of the controller is well demonstrated and evaluated at the MHz range up to 200 mm misalignment, meeting the strict requirements of resonant-based WPT systems.

中文翻译：

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用于基于谐振的无线功率传输发射器的自适应自调谐控制器 IC


本文介绍了一种用于谐振无线功率传输 (RWPT) 发射器的自适应自调谐控制器 IC。该控制器 IC 包括具有高分辨率的动态甚高频跟踪硬件和基于独立高分辨率数字脉宽调制器 (PWM) (HR-DPWM) 的电流编程控制。这些有助于精确的频率生成以及匹配网络中无功组件的自适应调谐，这转化为严格的电流/功率调节能力，同时在发射侧保持优化的功率传输条件。控制器 IC 能够有效地使电力传输能力不受谐振器、电路和无线介质变化的影响。控制器核心基于通过 HDL 工具实现的完全可合成数字架构，并且已开发并详细描述了几个关键构建模块：基于延迟线的相位检测器、高分辨率数字频率合成器和 HR -DPWM。为了充分发挥数字电子的优势，降低功耗，节省面积，控制器的数字核心完全采用异步架构设计，无需高速时钟及其相关硬件。该混合信号控制器IC 采用0.18μm 5V CMOS 工艺设计、实现和制造，有效硅面积为0.6 mm 2 。为了演示无线电源系统闭环运行中的混合信号控制器 IC，设计并验证了一个实验性 20W 谐振电容式 WTP 系统。 该控制器的有效性在高达 200 mm 失准的 MHz 范围内得到了很好的证明和评估，满足基于谐振的 WPT 系统的严格要求。