Dual-Transmitter Inductive Power Transfer System with Improved
Misalignment Tolerance and High Compatibility with Different-Sized
Receivers
Abstract
A dual-transmitter inductive power transfer system featuring two
concentric transmitter coils is proposed for low-power systems where
compatibility with different-sized receivers and good misalignment
tolerance are required. By incorporating two decoupled TXs into one
single unit, the proposed scheme achieves better power and efficiency
performance under a lower bill-of-materials cost compared to using two
individual TXs, especially when the RX coil is small and the coil
misalignment is large. Both TXs are energized using independent
inverters and the inverter output voltages are regulated in accordance
with the coupling condition to maximize the system efficiency.
Superiority of the dual-TX system over single-TX systems is proved by
experimental results.