Capacitors - Energy Stored
Energy stored and potential power generated from capacitors
Sponsored Links
Capacitor - Energy Stored
The energy stored in a capacitor can be expressed as
W = 1/2 C V2 (1)
where
W = energy stored (Joules)
C = capacitance (Farad)
V = potential difference (Voltage)
Capacitor - Power Generated
Since power is energy dissipated in a time - the potential power generated by a capacitor can be expressed as
P = W / t (2)
where
P = potential power (Watts)
t = dissipation time (s)
Example - Capacitor, energy stored and power generated
The power stored in a 10 μF capacitor charged to 230 V can be calculated as
W = 1/2 (10 10-6 μF) (230 V)2
= 0.26 Joules
If the energy is dissipated within 5 μs the potential power generated can be calculated as
P = (0.26 Joules) / (5 10-6 s)
= 52000 W
= 52 kW
Sponsored Links
Sponsored Links
Engineering ToolBox - SketchUp Edition - Online 3D modeling!
Engineering ToolBox - SketchUp Edition - enabled for use with the amazing, fun and free Google SketchUp.
Search the ToolBox
© The Engineering ToolBox 2005
9 11 11
