Electric Circuit Analysis: Unit V: Resonance and coupled circuits
Points to Remember in Parallel Resonant Circuit
Electric Circuit Analysis
Electric Circuit Analysis: Unit V: Resonance and coupled circuits : Points to Remember in Parallel Resonant Circuit
Points to Remember in Parallel Resonant Circuit
1.
For any parallel circuit consisting of one L and one C, the power factor is
unity at resonance. i.e., reactive part of Z is zero and also reactive part of
Y must be zero.
2.
For a parallel circuit we prefer to compute Y to Z.
3.
The expression for resonant frequency is obtained by equating reactive part of
Y (susceptance) to zero.
4.
At parallel resonance, the admittance is minimum and hence the impedance is
maximum and the current is minimum.
5.
For a parallel RLC circuit
(a)
f0 = 1/2π√LC
(b)
Q = R/ω0L = ω0 CR
6.
For a parallel practical resonant circuit
(a)
f0 = 1/π × √1/LC – R2/L2
(b)
Z = 1/Y = R2 + XL2 / R = L/CR
(c) Dynamic impedance, Zo = L/CR
(d)
Current at resonance = ECR / L
(e)
Current magnification = ω0 L / R = Q
7.
For a parallel circuit consisting of two circuits, one branch R1 and
L and another branch R2 and C,
Electric Circuit Analysis: Unit V: Resonance and coupled circuits : Tag: : Electric Circuit Analysis - Points to Remember in Parallel Resonant Circuit
Electric Circuit Analysis: Unit V: Resonance and coupled circuits
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Electric Circuit Analysis
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