Maximum Power Transfer

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Presentation transcript:

Maximum Power Transfer Maximize the power delivered to a resistive load ECE 201 Circuit Theory I

Consider the General Case A resistive network contains independent and dependent sources. A load is connected to a pair of terminals labeled a – b. What value of load resistance permits maximum power delivery to the load? ECE 201 Circuit Theory I

General Case (continued) ECE 201 Circuit Theory I

Take the Thevenin equivalent of the circuit ECE 201 Circuit Theory I

Look at the power developed in the load ECE 201 Circuit Theory I

Find the value of Rload that maximizes power ECE 201 Circuit Theory I

The maximum power delivered to the load ECE 201 Circuit Theory I

Example 4.12 a) Find the value of RL for maximum power transfer to RL. ECE 201 Circuit Theory I

Determine the Thevenin Equivalent ECE 201 Circuit Theory I

ECE 201 Circuit Theory I

Example 4.12 continued b) Calculate the maximum power that can be delivered to RL. ECE 201 Circuit Theory I

Example 4.12 continued What percentage of the power delivered by the 360 V source reaches RL? + Vab - Isource ECE 201 Circuit Theory I

Example 4.12 continued Percentage of source power delivered to the load ECE 201 Circuit Theory I