Week 03
Transformer Principles
I revisit magnetic circuits, transformers, and rotating machines around my transformer report and calculation sheets.
What I connect in this unit
By Faraday law, alternating primary flux induces voltage in both windings, and turns ratio sets voltage and current ratios. Referring a load impedance to the other side multiplies it by the square of turns ratio, while dot polarity marks corresponding instantaneous voltage polarity.
Concept map
- Faraday law
- Turns ratio
- Referred impedance
- Polarity
Technical anchor
The key relations are e = N dPhi/dt, V_1/V_2 = N_1/N_2 = a, and Z_2 referred to the primary as Z_2_prime = a^2 Z_2.
How I review it
Mark dot orientation and reference currents first, then verify that voltage ratio, current ratio, and referred impedance remain consistent with power conservation.
Connection to the full course
Unit 3 of 12. Unit numbers expand the saved report and calculations into a reading sequence rather than an attendance record.