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该论文提出了一种基于ΔΣ调制次谐波谐振开关的电压升压无线电力传输系统,通过快速负载跟踪器实现对负载变化的快速响应,解决了传统无线电力传输系统功率控制环路响应较慢的问题。
Recently, many applications have emerged that use wireless power delivery technology. A new standard “Qi” [1] has been established for battery operated portable devices. The rechargeable battery acts as a power buffer and shields the rapid load variation. Therefore, the requirement of the response to load variation is not so stringent and time constant of the power control loop is longer than several tens of milliseconds. Several hundred kHz band is chosen for switching frequency to reduce the power loss and frequency modulation (FM) [2] or pulsewidth modulation (PWM) [3] are used for power control because of their relaxed in-band spurious emission regulation. If a small-size wireless power transceiver for battery-less system is developed, the application area can be widely extended. One promising application is for non-contact large volume memory card (Fig. 16.8.1). The size of SD memory
Ryota Shinoda, Kazutoshi Tomita, Yuya Hasegawa, Hiroki Ishikuro
Keio University, Yokohama, Japan