While the original book was first published decades ago, it remains a staple in electrical engineering for its rigorous approach to vector diagrams and machine theory.
To clarify:
Principles Of Direct Current Machines : Alexander S. Langsdorf theoryalternatingcurrentmachinesalexanderlangsdorfpdf 2021
The keyword may be long and technical, but the treasure it points to is timeless. While the original book was first published decades
: