The third edition of the book was extensively restructured to reflect these changes. The material on ac motors and generators is now covered in Chapters 3 through 6, before the material on de machines. In addition, the de machinery cov- erage was reduced compared to earlier editions. This edition continues with this same basic structure. - Kitobning uchinchi nashri ushbu o'zgarishlarni aks ettirish uchun keng qamrovli qayta tuzilgan. O'zgaruvchan tok dvigatellari va generatorlari haqidagi materiallar endi mashinalar haqidagi materialdan oldin 3 dan 6 gacha bo'limlarda yoritilgan. Bundan tashqari, oldingi nashrlarga nisbatan de machinery qamrovi qisqartirildi. Ushbu nashr xuddi shu asosiy tuzilma bilan davom etadi.