The monograph deals with designs of electronically commutated brushless synchronous motors, theory of their fundamental issues and characteristics. Offers new designs of permanent-magnet synchronous motors and synchronous reluctance motors with external rotor, which ensures high electromagnetic torque per unit volume. Motor optimisation is done using metamodels based on results of the magnetic field numerical calculations. The monograph deals with methods and results of motors experimental research. The monograph is intended for students and professionals of electrical power engineering, electrical engineering and electrical technology.