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An electrical network shown in figure What type of compensator is this?

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  1. Phase lead compensator
  2. Phase lag compensator
  3. Lag-lead compensator
  4. Neither phase lead nor phase lag compensator

Answer (Detailed Solution Below)

Option 2 : Phase lag compensator
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Detailed Solution

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Concept:

Lag compensator:

Transfer function:

If it is in the form of , then a < 1

If it is in the form of , then a > b

Analysis:

The equivalent Laplace transform network for the given network is,

By applying voltage division,

The above system to be lag compensator, β > 1

⇒ R1 > 0 always

Therefore, at any value of R2 the given system acts as lag compensator.

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