Abstract
In this paper, an adaptive compensation loop control method is presented for dynamic range wireless power transfer (WPT) based wireless endoscopic capsules (WEC) applications. Rather than a fixed external resistor feedback network utilized in the DC-DC converter with maximum power point control (MPPC) capability, an enhanced nMOSFET based adaptive compensation loop is introduced to extract maximum power transfer from the RF-DC rectifier within overall operational power range of the WEC system. Simulation in ADS and measurement among three rectifiers with an LDO, a fixed external resistor feedback network and an adaptive compensation loop control are performed respectively to achieve a steady 3.3V on a resistive load of 100Ω, which validates that the proposed adaptive compensation loop control method realizes an extended dynamic power range with a lower limit of 21.5dBm to realize a minimum 100mW load DC power delivery for the IPT enabled WEC system.
| Original language | English |
|---|---|
| Pages (from-to) | 499-504 |
| Number of pages | 6 |
| Journal | Applied Computational Electromagnetics Society Journal |
| Volume | 33 |
| Issue number | 5 |
| State | Published - 2018 |
| Externally published | Yes |
Keywords
- Adaptive compensation loop
- Dynamic range
- Enhanced nMOSFET
- MPPC
- Resistor feedback network
- WEC
- WPT