1. ADAPTIVE FREQUENCY CONTROL OF A
SENSORLESS-RECIEVER INDUCTIVE
WIRELESS POWER TRANSFER SYSTEM
BASED ON MIXED-COPENSATION
TOPOLOGY
PRESENTED BY,
ANANTHAKRISHNAN V A
Reg.No- 961521411002
Dept. of EEE,
Maria College of Engineering
and Technology
GUIDED BY,
Mr. S.P. ARAVIND, M.E.,
Assistant Professor
Dept. of EEE,
Maria College of Engineering
and Technology

2. ABSTRACT
 The mixed compensation topology is utilized instead of the
conventional topologies to deliver power more efficiently.
Perturb and observe is proposed to track the optimal
operating frequency to achieve maximum transfer efficiency
or maximum output power delivery.
 Moreover, the paper proposes a highly accurate analytical
model considering the nonlinear effect of the ac/dc rectifier-
stage.
 Two sub-systems are considered; a rectifier based resistive-
load and a rectifier based battery-load. The rectifier based
battery-load is represented as a variable ac voltage source.

3.  The proposed model is linearized using the first harmonic
approximation technique and generalized using the
equivalent representation, thus the proposed model can be
applied to any compensation topology.
 Afterward, a systematic approach is developed based on
the proposed model to estimate the connected load
information including battery voltage based on sender-side
measurements only.
 This results in a smaller size and increased portability of
the receiver.

4. INTRODUCTION
 Over the preceding decade, consumable electronic gadgets have
become computationally more powerful and rapid lessening in
size.
 These devices changed the human lifestyle and the way how
human interact with the surrounding. We are almost relying on
our electronic gadgets and machines which complete our work.
 Thousands of new products are coming to the market every year
with new inventions and technology. As the increase in the
number of electronic devices used by a person, the power
supply to these devices to sustain for a long period becomes a
major concern.

5. PROPOSED METHODOLOGY
Block Diagram

6. Basic WIRELESS circuit

7. SIMULATION ANALYSIS

8. The transient response of the improved simulation model. The load is
adjusted at t=0.3s from 100 percent to 25 percent in step in the simulation. As
shown in the Fig 10, the input current and the output voltage controls are stable
and the voltage is very well regulated. At t=0.6s, the load is adjusted to 100
percent. In that condition, there is no significant transient problem. DC output
voltage is 48V. the proposed Wireless converter with ripple-free input current. The
auxiliary circuit includes an additional winding No of the input inductor Lc an
auxiliary inductor L and a capacitor Co. The coupled inductor Lc is modeled as a
magnetizing inductance Lm and an ideal transformer which has a turn ration of
1:n. The operation of the proposed converter is symmetrical in two half-line cycles
of input voltage. Therefore, the converter operation is analyzed during one
switching period in the positive half-line cycle of the input voltage. It is assumed
that the converter operates in discontinuous conduction mode (DCM), so the
output diode D is turned OFF before the main switch is turned ON. The
capacitance of the output capacitor Co is assumed sufficiently large enough to
consider the output voltage V as constant.

9. Variation of System Efficiency with Transfer
Distance

10. Resonance Frequency and Mode

11. Output Voltage waveform

12. CONCLUSION
The proposed model is generalized using equivalent representation to be
applicable to any IWPT compensation topology. A variable frequency control
strategy is proposed to track maximum efficiency or output power delivery with
no added circuitry at the receiver-end. A sensorless-receiver operation using P&O
algorithm for optimal frequency tracking is implemented based on an accurate
estimation of connected load parameters. The rectifier based resistive-load sub-
system achieved a 72.8% transfer efficiency at 15 mm transfer distance where the
error percentage between the proposed estimated load parameter and the
measured ones is 2.44%. The rectifier based battery-load achieved a 69% transfer
efficiency at 15 mm transfer distance and the measured battery voltage (7.4 V) is
estimated to be 7.58 V. The simulation results confirm the validity of the
proposed model and the accuracy of the proposed estimation and optimal
frequency tracking technique.

13. REFERENCE
1. Chih-Lung Shen, “Dual-Output Single-Stage Wireless WIRELESS with
Power Factor Correction”, Journal of Power Electronics, Vol. 15, No. 2,
pp. 309-318, March 2015.
2. Hemalatha Gunasekaran, “Wireless Wireless Converter For Power
Factor Improvement”, International Journal of Innovative Works in
Engineering and Technology (IJIWET).
3. Saravanan..S, “Wireless Discontinuous Conduction Mode WIRELESS
Power Factor Correction Rectifier”, International Journal of Automation
and Power Engineering, 2012, 1: 61-66 - 61 - Published Online May
2012.

14. THANK YOU