Analyze the different loss components in electrical machines and their minimization.

Machine losses include: copper losses (I^2R in windings, reduce with larger conductors or better cooling), core losses (hysteresis and eddy current in iron, minimize with thin laminations and low-loss steel grades), stray losses (leakage flux, skin effect, vary with load), mechanical losses (friction and windage, significant at high speed), and additional losses (harmonics in inverter-fed machines). Loss segregation tests per IEEE 112 or IEC 60034-2 determine individual components. Total efficiency depends on operating point - optimum efficiency typically occurs at 75% load.