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inductance de protection - translation to English
CONCEPT IN ELECTRONICS
Equivalent Series Inductance; Effective series inductance
inductance de protection
n. choke
Definition
Inductance
The property of a circuit in virtue of which it exercises induction and
develops lines of force. It is defined variously. As clear and
satisfactory a definition as any is the following, due to Sumpner and
Fleming: Inductance is the ratio between the total induction through a
circuit to the current producing it. "Thus taking a simple helix of five
turns carrying a current of two units, and assuming that 1,000 lines of
force passed through the central turn, of which owing to leakage only
900 thread the next adjacent on each side, and again only 800 through
the end turns, there would be 800 + 900 + 1000 + 900 + 800, or 4,400
linkages of lines with the wire, and this being with 2 units of current,
there would be 2,200 linkages with unit current, and consequently the
self-inductance of the helix would be 2,200 centimetres." (Kennelly.)
Inductance, as regards its dimensions is usually reduced to a length,
hence the last word of the preceding quotation.
The practical unit of inductance is termed the henry, from Prof. Joseph
Henry; the secohm, or the quad or quadrant. The latter alludes to the
quadrant of the earth, the value in length of the unit in question.
[Transcriber's note: (L (di/dt) = V). A current changing at the rate of
one ampere per second through a one henry inductance produces one volt.
A sinusoidal current produces a voltage 90 degrees ahead of the current,
a cosine (the derivative of sine is cosine). One volt across one henry
causes the current to increase at one ampere per second.]
Wikipedia
Equivalent series inductance
Equivalent series inductance (ESL) is an effective inductance that is used to describe the inductive part of the impedance of certain electrical components.
