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ENG17 (Sec. 1): Circuits I Summer 1 2014
Lecture 6: Equivalent Circuits, Max Power Transfer, Superposition Nilsson & Riedel ENG17 (Sec. 1): Circuits I Summer July 1, 2014 Notes are here
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Overview Thevenin Equivalent Norton Equivalent Special Cases
Maximum Power Transfer Superposition
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Thevenin Equivalent Circuit
Independent voltage source in series with resistor Provides simplified equivalence to more complex circuit
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Finding Thevenin Equivalent
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Example Find equivalent w.r.t. a-b. Then, find I.
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Overview Thevenin Equivalent Norton Equivalent Special Cases
Maximum Power Transfer Superposition
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Norton Equivalent Circuit
Independent current source in parallel with resistor Provides simplified equivalence to more complex circuit Relates to Thevenin Equivalent (source transformation)
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Finding Norton Equivalent
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Overview Thevenin Equivalent Norton Equivalent Special Cases
Maximum Power Transfer Superposition
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With Dependent Source
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Alternate Method
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Example Find RN and IN
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Overview Thevenin Equivalent Norton Equivalent Special Cases
Maximum Power Transfer Superposition
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Power Transfer Two issues: Efficiency of Power Transfer
Amount of Power Transfer
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Maximum Power Transfer
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Example Find value of RL that results in maximum power transfer.
Use Thevenin Equivalent circuit.
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Example Find the value of RL for maximum power transfer. Find the maximum power.
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Overview Thevenin Equivalent Norton Equivalent Special Cases
Maximum Power Transfer Superposition
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Superposition Applies to linear system
Defined: when linear system is excited by >1 independent energy sources, the total response is the sum of individual responses. Clarified Deactivate 1st source, find response from 2nd source Deactivate 2nd source, find response from 1st source Add these responses
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In practice May not help so much right now…
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w/Dependent Sources
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Example Use superposition to find vo.
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Overview Thevenin Equivalent Norton Equivalent Special Cases
Maximum Power Transfer Superposition
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