22-05-2014, 04:57 PM
ULTRA-CAPACITORS
ULTRA-CAPACITORS.pptx (Size: 1.23 MB / Downloads: 23)
INTRODUCTION
There are many energy storage technologies that are employed in a wide range of useful electric power systems.
For smaller storage applications at the distribution or customer-utilization levels of the system, batteries have been used.
Batteries have some serious drawbacks.
These drawbacks have given the industry to search for ultra-capacitors.
Ultra-capacitor:
An ultra-capacitor is an electrochemical device consisting of two porous electrodes immersed in an electrolyte solution that stores charge electrostatically.
The key difference of the ultra-capacitor is that with its liquid electrolytic structure and porous electrodes.
Ultra-capacitor can have 100 to 1000 times the capacitance per unit volume compared to a conventional electrolytic capacitor.
Why Ultra-capacitors?
Ultra capacitors can be used in wide voltage range and temperature range.
Ultra capacitors have capability of its use in high power applications.
These are high-energy version devices of a conventional capacitor, acts like a container which stores electrical energy and then delivers it whenever a sudden burst is needed.
Discharging…
Ultra capacitor has two voltage components, Capacitor and resistive component.
The capacitive component represents the voltage change due to the change in energy within the ultra capacitor.
The resistive component represents the voltage due to the equivalent series resistance(ESR)of the ultra capacitor.
Applications
Quick Charging applications: Ultra capacitors charge in seconds where as batteries take hours to charge. Wireless power tools employing an ultra capacitor can be charged just before use.
Memory backup applications.
All weather quick start.
Summary
Ultra capacitor’s structure..
Why..
Charging..
Applications..
PWD..
TUCAP..