x Contents Chapter 8 Control of AC Machines ..........................................................................................237 8.1 Vector Control of AC Motors ........................................................................237 8.2 AC Machine Modeling for Controls ..............................................................239 8.2.1 Rotating Reference Frame ................................................................240 8.2.2 Induction Machine dq Model ...........................................................
241 8.2.3 Power and Electromagnetic Torque ..................................................242 8.3 Induction Machine Vector Control ................................................................244 8.3.1 Rotor-Flux-Oriented Vector Control ................................................244 8.3.2 Direct and Indirect Vector Controls .................................................246 8.3.2.1 Direct Vector Control .......................................................246 8.3.2.2 Indirect Vector Control .....................................................248 8.3.2.3 Vector Control Implementation ........................................248 8.4 PM Synchronous Machine Vector Control....................................................249 8.4.1 Voltage and Torque in Reference Frames .........................................249 8.4.2 PMSM Simulation Model .................................................................250 8.4.3 PM Synchronous Machine Drives....................................................
251 8.4.3.1 Flux Weakening ................................................................252 8.4.3.2 Current and Voltage Controllers .......................................252 8.4.4 IPM Synchronous Machine Controls ...............................................253 8.4.4.1 Current Constraint ............................................................253 8.4.4.2 Voltage Constraint ............................................................254 8.4.4.3 Maximum Torque per Ampere (MTPA) ...........................254 8.4.4.4 Maximum Torque per Voltage (MPTV) ...........................255 8.4.4.5 Characteristic Current, Finite Drive System and Infinite Drive System ........................................................255 8.5 Current Control Methods ..............................................................................257 8.5.1 Hysteresis Current Controller ...........................................................257 8.5.2 PI Current Regulator ........................................................................259 8.6 SRM Controls ................................................................................................260 8.6.1 Control Parameters ...........................................................................
261 8.6.1.1 Advance Angle Calculation ..............................................
261 8.6.1.2 Current-Controlled Drive .................................................262 Problems ...................................................................................................................262 References ................................................................................................................264 Chapter 9 Power Electronic Converters ....................................................................................265 9.1 Power Electronic Switches ............................................................................265 9.1.1 Diode ................................................................................................267 9.1.2 BJT ...................................................................................................267 9.1.3 MOSFET ..........................................................................................267 9.1.4 JFET .................................................................................................268 9.1.5 IGBT .................................................................................................268 9.1.6 Bi-directional Switch ........................................................................269 9.1.7 Electrical Properties .........................................................................269 9.1.8 Si, SiC and GaN Power Devices ......................................................272 9.2 DC/DC Converters ........................................................................................273 9.2.1 Non-isolated DC/DC Converters .....................................................
274 9.2.1.1 Buck Converter ................................................................. 275 9.2.1.2 Boost Converter ................................................................276