Electrical Engineering › Section K · Methods of analysis and theorems (ac) › Topic K.5
Maximum power transfer and other theorems (ac)
In dc, a load takes the most power from a source when its resistance matches the source's. In ac the answer has a twist: the load must also cancel the source's reactance. This topic finds the best load, the best you can do when the load is restricted, and three shorter theorems that round off ac network analysis.
In this topic
- From matched resistance to conjugate match
- The maximum power transfer theorem (ac)
- Worked example: a conjugate match
- When the load is restricted
- Worked example: a resistor-only load
- Matching, efficiency and where it matters
- Substitution and reciprocity
- Millman's theorem (ac)
- Worked example: Millman's theorem
- Common mistakes to avoid
- Key takeaways
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