Objectives:
- To study on wireless power transfer
- To investigate non-radioactive technique wireless power transfer
- To differentiate types of non-radioactive wireless power transfer
Methods:
- By making some research on internet
- Get assist from lecturer
- Below are the attachment detail on non-radioactive wireless power transfer
Results:
Conclusion:
For this
week, I more focused on the non-radioactive wireless power transfer technique,
because it is the method that I will be using in my final year project. Non-radioactive
wireless power transfer are consist of three methods of coupling which are
inductive coupling, capacitive coupling and also magnetodynamic coupling. Inductive
coupling or electrodynamic induction is the near field wireless transmission of electrical energy
between two magnetically coupled coils that are part of resonant
circuits tuned to resonate at the same frequency. This
process occurs in a resonant transformer, an electrical component which
consists of two high Q coils wound on the same core with capacitors
connected across the windings to make two coupled LC circuits.
Resonant transfer works by making a coil ring with an oscillating current. This
generates an oscillating magnetic field. Because the coil is highly
resonant, any energy placed in the coil dies away relatively slowly over very
many cycles; but if a second coil is brought near it, the coil can pick up most
of the energy before it is lost, even if it is some distance away. Meanwhile capacitive
coupling is the transfer of energy within an electrical network by means of the capacitance
between circuit nodes. This coupling can have an intentional or accidental
effect. Capacitive coupling is typically achieved by placing a capacitor
in series with the signal to be coupled. Lastly,
magnetodynamic coupling is a power that being generated by two motors that
rotate synchronously paired by a magnetic field that being generated by
permanent magnet. The receiver armature is turned by the existence of the
transmitter magnetic field. The magnetic field acts as a mechanical coupling
between armatures. The receiver armature then produces power as it is being
turn by the transmitter armature.
