Impact Factor (2025): 6.9
DOI Prefix: 10.47001/IRJIET
Inductive
Power Transfer (IPT) has received most of the interest until now; new
researches on Capacitive Power Transfer (CPT) have led to proposals for high
power, long distance applications, such as electric vehicle charging or
handheld devices. So the traditional conception of capacitive wireless
transmission only for low power and short distances is slowly changing. Here
the proposed CPT system can track the maximum power transfer capability over a
wide load variation even when the resonant circuit is not fully tuned. The
maximum power transfer is achieved by designing a DC-DC buck-boost converter
with duty cycle control for dynamic impedance matching. In the inductively
coupled power transfer (ICPT) method, the power is transferred wirelessly
between separated coils via MF, while the CPT relies on the electric field (EF)
to transfer power between two pairs of metal plates. By applying capacitive
coupling by means of electric field, wireless power transfer can be realized
between a transmitter and a receiver. The presented capacitive link design can
reduce the receiver to the bare minimum, the capacitance plates and the load.
All tuning for variable coupling occurs at the transmitter side, therefore
lowering the costs and making data communication no longer necessary. State of
the art of CPT converters includes a significant variety of resonant
topologies, including different number of switches in the inverter, from single
switch to a half or full bridge, different resonant tanks and impedance
adaptation networks. This work is focused on simplicity, using as simple high
frequency inverter and series resonant tank. Bearing in mind that the goal of
this research was to achieve efficiency as high as possible, and that a high
switching frequency is needed to compensate for the low capacitance value and
to select the resonant tank and the inverter best suited for the application.
Country : India
IRJIET, Volume 6, Issue 6, June 2022 pp. 285-291