Power (physics) - Peak Power and Duty Cycle

Peak Power and Duty Cycle

In the case of a periodic signal of period, like a train of identical pulses, the instantaneous power is also a periodic function of period . The peak power is simply defined by:

$P_0 = \max$ .

The peak power is not always readily measurable, however, and the measurement of the average power is more commonly performed by an instrument. If one defines the energy per pulse as:

$\epsilon_\mathrm{pulse} = \int_{0}^{T}p(t) \mathrm{d}t \,$

then the average power is:

$P_\mathrm{avg} = \frac{1}{T} \int_{0}^{T}p(t) \mathrm{d}t = \frac{\epsilon_\mathrm{pulse}}{T} \,$ .

One may define the pulse length such that so that the ratios

$\frac{P_\mathrm{avg}}{P_0} = \frac{\tau}{T} \,$

are equal. These ratios are called the duty cycle of the pulse train.

Read more about this topic: Power (physics)

Famous quotes containing the words peak, power, duty and/or cycle:

“In the mountains, the shortest way is from peak to peak: but for that you must have long legs. Aphorisms should be peaks: and those to whom they are addressed, great and lofty.”
—Friedrich Nietzsche (1844–1900)

“The competent leader of men cares little for the niceties of other peoples’ characters: he cares much—everything—for the exterior uses to which they may be put.... These are men to be moved. How should he move them? He supplies the power; others simply the materials on which that power operates.”
—Woodrow Wilson (1856–1924)

“‘Tis a sort of duty to be rich, that it may be in one’s power to do good, riches being another word for power.”
—Mary Wortley, Lady Montagu (1689–1762)

“Oh, life is a glorious cycle of song,
A medley of extemporanea;
And love is a thing that can never go wrong;
And I am Marie of Roumania.”
—Dorothy Parker (1893–1967)