I am looking to incorporate a inductive charging mechanism into a project I’m working on. On the receiving side I only have room for a single layer coil design. For my transfer side I have more spatial freedom. What I’ve found online thus far is that by aligning my coils (Same ID, OD, # of turns) and adding ferrite reflector to both sides I will have the greatest efficiency. If I continue to add layers of coils ( one article mentioned having a layer of coil separated by a soft iron core then the second coil layer) will I be able to increase my magnetic field strength and thus increase efficiency?, granted I keep the resonant frequency the same for each coil?
All the studies I've seen have had identical double layer coil designs. Will the efficiency still increase if the transfer side is a double layer but the receiver is a single layer? What are risks associated with this mismatch?