Week 06
Voltage Regulation and Efficiency
I revisit magnetic circuits, transformers, and rotating machines around my transformer report and calculation sheets.
What I connect in this unit
Copper loss varies with load current squared, while core loss is approximately fixed at constant voltage and frequency. Together they set efficiency, and load power factor changes the phase of series-impedance voltage drop, affecting both magnitude and sign of voltage regulation.
Concept map
- Copper loss
- Core loss
- Power factor
- Maximum efficiency
Technical anchor
Use eta = P_out/(P_out + P_core + P_cu) and voltage regulation = (V_noload - V_load)/V_load. At constant voltage, maximum efficiency occurs when variable copper loss equals fixed core loss.
How I review it
Plot regulation for lagging and leading power factor, then check whether the crossing of load-dependent P_cu and fixed P_core agrees with the maximum-efficiency condition.
Connection to the full course
Unit 6 of 12. Unit numbers expand the saved report and calculations into a reading sequence rather than an attendance record.