1. FIELD OF THE INVENTION
To provide the backup power to various LRUs related to Flight Data Recorder in absence of
main power supply of aircraft.
2. BACKGROUND OF THE INVENTION
Aircraft has a main power supply and a backup supply in case of emergency. If a case
happened where both power supply are not working and aircraft is flying. In that case no
data will be recorded in the Flight Data Recorder. Backup PCB is designed for providing
power to Flight Data Recorder in that case.
3. SUMMARY OF PRESENT INVENTION
For providing the backup power, backup PCB is designed with the help of super capacitor.
Here, a series of super capacitor bank is used to store energy through power resistors.
Energy Storage Capacitor bank consists of number of such super capacitors. This circuit
provides supply to various LRUs related to Flight Data Recorder.
4. BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1: It shows charging & discharging principle.
Figure 2: It shows the block diagram of Backup PCB.
5. DETAILED DESCRIPTION
Backup PCB is a device or physical media that store some form of energy to perform some
useful operation at a later time. To store energy super capacitors are being used, it
represents the actual storage devices being able to provide high power density as compared
to battery. It is also applicable for high rate of charging and discharging operation.
A super capacitor is an electrochemical capacitor that has an unusually high energy density
when compared to common capacitors, typically on the order of thousands of times greater than a high capacity electrolytic capacitor. The same size electric double-layer capacitor
would have a capacitance of several farads, but usually at a lower working voltage.
In backup PCB, a series of 12 super capacitors is used to store energy through power
resistor. It follow the principle of τ = RC for charging and discharging super capacitor as
shown in figure 1. After time ie τ = RC the super capacitor bank stop charging and whenever
backup power is required it starts discharging till it gets fully discharge.

WE CLIAMS:-
Accordingly, the description of the present invention is to be considered as illustrative only and is for the purpose of teaching those skilled in the art of the best mode of carrying out the invention. The details may be varied substantially without departing from the spirit of the invention, and exclusive use of all modifications which are within the scope of the appended claims is reserved. We Claim

1. The said system, comprising
- A bank of charge storage devices connected to generate sufficient power &
- A base to hold and connect the bank with each other as well as to other systems electrically.
2. The system according to claim 1, capable of charging and discharging a higher rate.
3. The system according to claim 1, does not have the drawbacks of batteries like limited charging and discharging cycle.
4. The system according to claim 1, capable of increasing and/or decreasing backup time by changing the value of atleast one charge storage device.
5. The system according to claim 1, used in aircraft, heavy & public transport, private vehicles, motor racing vehicles etc
6. The system according to claim 1, is cost effective than conventional battery.
7. The system according to claim 1, is light in weight than conventional batteries as well as has easy maintenance, repair and installation. ,TagSPECI:As per Annexure-II