| IP개요 |
This proposal presents a novel multiple-input boost converter architecture that enables simultaneous maximum power point tracking (MPPT) from both high-voltage (HV) and low-voltage (LV) sources, thereby facilitating efficient ambient energy harvesting. The proposed system integrates a series-capacitor-assisted MPPT that independently controls the operating point of each source to extract maximum power. The MPPT block consists of a low-voltage controller (LVC), a high-voltage controller (HVC), and a series capacitor network. When the HV source exceeds its maximum power point (MPP), the HVC dynamically reconfigures the system by swapping the buffer capacitor with the series capacitor. This causes a slight increase in the boost converter input voltage, which may disturb the LV source’s MPP. Then, the LVC reacts to this situation by adjusting the duty cycle, which restores the optimal operating point of the LV source. This coordinated control ensures adaptive and efficient energy extraction under varying source conditions. The proposed approach enables dynamic reconfiguration of both capacitor networks and converter duty cycles, facilitating seamless energy transfer between HV and LV sources and the load. It overcomes the limitations of conventional time-division multiplexing (TDM), multi-step-down (MSD) converters, and serial stack resonance (SSR) techniques, providing a scalable solution for powering low-power electronics, such as IoT nodes and wireless sensor networks. |
