IEC 60050 - International Electrotechnical Vocabulary

IEVref:

351-50-02

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Status: Standard

Term:

first-order lag element

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linear time-invariant transfer element the transfer function of which has exactly one real-value negative pole and no zero

Note 1 to entry: The transfer function of a first-order lag element is given as

$\frac{V (s)}{U (s)} = \frac{K_{Ρ}}{1 + T_{1} \cdot s}$

where

K_P is the proportional action coefficient;

T₁ is the time constant;

s is the complex variable of the Laplace transform;

U(s) is the input transform;

V(s) is the output transform.

Note 1 to entry: This entry was numbered 351-28-13 in IEC 60050-351:2006.

Publication date:

2013-11

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