Principles of vector orientation and vector orientated control structures for systems using three-phase AC machines -- Inverter control with space vector modulation -- Machine models as a prerequisite to design the controllers and observers -- Problems of actual-value measurement and vector orientation -- Dynamic current feedback control for fast torque impression in drive systems -- Equivalent circuits and methods to determine the system parameters -- On-line adaptation of the rotor time constant for IM drives -- Optimal control of state variables and set points for IM drives -- Nonlinear control structures with direct decoupling for three-phase AC drive systems -- Linear control structure for wind power plants with DFIM -- Nonlinear control structure with direct decoupling for wind power plants with DFIM -- Appendices.