BASICS OF ELECTRICAL ENGINEERING - PART - 21 - INDEPENDENT AND DEPENDENT ENERGY SOURCES

INDEPENDENT ENERGY SOURCES

This type of sources, i.e., voltage or current is not changed by any variation in the connected network.

DEPENDENT ENERGY SOURCES

If the strength of voltage or current is changed due to any variation in the connected network, they are dependent source.

ALTERNATING SOURCES

Alternating source is sometimes used in which voltage or current varies with time, i.e., sinusoidally, exponentially and so on.

CONTROLLED SOURCES

Dependent sources are also known as controlled sources are of the following types.

1. VCVS – Voltage Controlled Voltage Source - Practically VCVS is an amplifier which amplifies V2 to µ times V2.

2. CCVS – Current Controlled Voltage Source – Practically CCVS is a resistance which converts current to voltage.

3. VCCS – Voltage Controlled Current Source – Practically VCCS is a conductance which converts voltage to current.

4. CCCS – Current Controlled Current Source – Practically CCCS is an amplifier which amplifies voltage to current.

SOURCE TRANSFORMATION

Any practical VOLTAGE SOURCE consists of an ideal voltage source in SERIES with its terminal resistance.

Any practical CURRENT SOURCE consists of an ideal current source in PARALLEL with its internal resistance.

The voltage and current sources are mutually transferable.