Design Of Small Electrical — Machines Hamdi

Although brushless motors dominate, Hamdi’s classic text covers commutators extensively:

Hamdi’s chart gives A = 15,000 A/m for this size (much lower than large machines). Total armature current I_a = T / (B_g × A × D × L × efficiency factor) ≈ 2.1 A. Design Of Small Electrical Machines Hamdi

Hamdi’s core argument—and the book’s greatest feature—is that You cannot simply shrink a 10kW motor to get a 10W motor. As volume decreases: As volume decreases: Small machines have no built-in

Small machines have no built-in fans, no water jackets, and often operate in sealed environments (e.g., vacuum cleaners or medical pumps). Hamdi developed a simplified lumped-parameter thermal network specific to small frames (NEMA 42, 48, or metric 40–80 mm). Design of Small Electrical Machines: Hamdi, Essam S

💡 : If you are looking for a guide that balances modern software-based optimization with traditional engineering principles for small motors, Hamdi's book is a definitive source. Design of Small Electrical Machines: Hamdi, Essam S.