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A 13.56 MHz wireless power transfer system with a 1X/2X reconfigurable resonant regulating (R ) rectifier and wireless power control for biomedical implants is presented. Output voltage regulation is achieved through two mechanisms: 1) a local PWM loop at the secondary side controls the duty cycle of mode-switching of the rectifier between the 1X and 2X modes; and 2) a global control loop obtains...
This paper presents a technique to be used for the cellular phone charger. The proposed technique identifies system conditions to control the output voltage, measuring only the primary side voltage and current. The method estimates the load and the coupling coefficient of the circuit by perturbing the operating frequency. The control method, designed in Primary-Series-Secondary-Series (SS) topology...
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