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PC
Çæ ãÇ íÓãí
PULSE CURRENT
ÇæãÇíÓãì
Pulsed power is the science and technology of accumulating
energy over a relatively long period of time and releasing it very quickly, thus increasing the instantaneous power.
Steady accumulation of energy followed by its rapid release can result in the delivery of a larger amount of instantaneous
power over a shorter period of time (although the total energy is the same). Energy is typically stored within
electrostatic fields (
capacitors),
magnetic fields (
inductor), as mechanical energy (using large
flywheels connected to special purpose high current
alternators), or as chemical energy (high-current lead-acid
batteries, or
explosives). By releasing the stored energy over a very short interval (a process that is called energy compression), a huge amount of peak power can be delivered to a
load. For example, if one
joule of energy is stored within a capacitor and then evenly released to a load over one second, the peak power delivered to the load would only be 1 watt. However, if all of the stored energy were released within one
microsecond, the peak power would be one
megawatt, a million times greater. Examples where pulsed power technology is commonly used include
radar,
particle accelerators, ultrastrong
magnetic fields,
fusion research,
electromagnetic pulses, and high power pulsed
lasers.
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