Abstract
This letter proposes a wireless power transfer (WPT) that includes three single-coil transmitters (TX) and one central controller to arrange the power transfer of each TX according to the 3-D position of the receiver (RX). The proposed noise cancellation technique uses the auxiliary coil to enhance the received signal by 52% and the noise can be reduced to -62.6 dB. The demodulator and the vector detector at the central controller can obtain and use the κ factor of each TX to decide the power transfer of each TX. The peak efficiency of the main TX can reach 90.1% and the maximum power is 69 W with 3TXs.
Original language | English |
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Pages (from-to) | 213-216 |
Number of pages | 4 |
Journal | IEEE Solid-State Circuits Letters |
Volume | 6 |
DOIs | |
State | Published - 2023 |
Keywords
- 3-D coil
- noise cancellation
- vector detection
- wireless power transfer (WPT)