3rd Week: "Impedance Combinations"

"Impedance Combinations"


Consider the N series-connected impedances. The same current I flows through the impedances. Applying KVL around the loop gives,

V = V1 + V2 + · · · + VN = I(Z1 + Z2 + · · · + ZN )

The equivalent impedance at the input terminals is,

Zeq = VI = Z1 + Z2 + · · · + ZN

showing that the total or equivalent impedance of series-connected impedances is the sum of the individual impedances. This is similar to the series connection of resistances.

The equivalent admittance is,

Yeq = Y1 + Y2 + · · · + YN

"Delta-to-Wye and Wye-to-Delta Transformations"
The delta-to-wye and wye-to-delta transformations that we applied to resistive circuits are also valid for impedances. The same process like how we combine resistors.

A delta or wye circuit is said to be balanced if it has equal impedances in allthree branches.


Reflection:

• I learned that all the concepts and process in solving the combinations in Ac Analysis are the same with Dc Analysis. It only involves complex numbers.

Videos:

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GOD Bless! :)

By:

AYALA, ARNY  S.   BSECE -3

ECE 321

Professor:

ENGR. JAY S. VILLAN, MEP - EE