Lead-Lag Network: Series RC & Parallel RC Combinations

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Homework Help Overview

The discussion revolves around the behavior of series and parallel RC networks in relation to phase angles, specifically how a series RC network can act as a lead network and a parallel RC combination can act as a lag network.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the complex impedances of RC networks and how their configurations affect phase angles. Questions arise regarding the conditions under which phase angles increase or decrease based on the arrangement of resistors and capacitors.

Discussion Status

The conversation is exploring various interpretations of how RC networks influence phase angles. Some participants have offered initial thoughts on impedance and configurations, while others are seeking deeper understanding of the phase angle changes.

Contextual Notes

There is an emphasis on the connection of the RC networks to the load, which may influence the outcomes being discussed. Specific configurations and their effects on phase angles are under examination.

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How is a series RC network acting as a lead network & a parallel RC combination acting as a lag network ?
 
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a good start would be to write down the complex impedances of each
 
It depends on how the RC network is connected to the load. For example, if R and C is added in series with the load, then the phase angle of the load current will increase. If C is in parallel with the load and R is in series with both, then the phase angle will decrease. However, if R is in parallel with C and the combined network is in series with the load, the phase angle of the load will increase.
 
How is this phase angle increasing & decreasing , that i want to know .
 

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