What is the condition for AC maximum power transfer?
Condition for Maximum Power Transfer That means, if the value of load resistance is equal to the value of source resistance i.e., Thevenin’s resistance, then the power dissipated across the load will be of maximum value.
What is the condition for maximum power transfer in DC and AC circuit?
Here, one finds that the maximum power transfer occurs when the source and load impedances are complex conjugates of each other. In other words, the instantaneous power is maximum when the source and load resistances are equal, and when the source and load reactances are equal with opposite sign.
How do you find the maximum power of an AC circuit?
Since (R-jX) is complex conjugate of (R+jX), we can say that, the value of load impedance must be complex conjugate of source network impedance. Thus, the maximum power transfer theorem in AC circuit is proved. The amount of maximum power transferred may be find out by putting RL = R and XL = -X in information (1).
When does maximum power transfer occur in an AC circuit?
Therefore, in AC circuits, if X L = – X TH and R L = R TH, maximum power transfer takes place from source to load. This implies that maximum power transfer occurs when the impedance of the load is complex conjugate of the source impedance, i.e., Z L = Z*.
How to calculate the maximum power transfer theorem?
Let Zs = (R+jX). Then for delivery of maximum power from source to load, the value of load impedance should be conjugate of the source impedance. This essentially means that the value of ZL should be equal to (R – jX). This is maximum power transfer theorem for AC circuit.
How to prove the power transfer theorem in AC circuit?
To prove it, we assume a circuit (Figure 1) where load impedance is Z L and source impedance is Z g, connected in series with the source V g. Let I be the current through the load.
How is power transferred from source to load?
In a linear network having energy source and impedances, maximum amount of power is transferred from source to load impedance if the load impedance is the complex, conjugate of the total impedance of the network, i.e. if the source impedance is , to have maximum power transfer, the load impedance must be .