Theory-alternating-current-machines-alexander-langsdorf-pdf - Link

Perhaps the greatest lesson in Langsdorf’s PDF is his treatment of the magnetic circuit . Modern engineers, spoiled by finite element software (FEM), often forget that a machine is just iron and copper. Langsdorf reminds you that B-H curves are non-negotiable. His chapter on hysteresis and eddy current losses (Steinmetz coefficients) is still used today to write loss calculation macros for electric vehicle motors.

If you are looking for a PDF or a deep dive into this classic, here is why it remains a "holy grail" for power engineering. Why This Text Still Matters Theory-alternating-current-machines-alexander-langsdorf-pdf