Vector Control of AC MachinesVector control has become a powerful and frequently adopted technique that permits the use of induction and synchronous machine drives for high-performance applications previously restricted to unwieldy d.c. drives. This book provides detailed discussion of the various forms of vector control of smooth-air-gap and salient-pole electrical machines supplied by impressed stator voltages, currents, or impressed rotary currents. It includes coverage of rotor oriented, rotor-flux oriented, stator-flux oriented, and magnetizing-flux oriented control. Other topics include the necessary decoupling circuits, the effects of non-ideal drives, and rotor speed and rotor resistance identification by means of model reference adaptive control theory. This is an ideal text for students and for anyone requiring in-depth coverage of space phasor and generalized electrical machine theories and the control of variable-speed a.c. drives. |
Contents
INTRODUCTION | 1 |
The rotor fluxlinkage space phasor in the rotating | 15 |
Electromagnetic torque production in d c machines | 21 |
Copyright | |
6 other sections not shown
Common terms and phrases
angular slip frequency considering eqns current controller current space phasor cycloconverter d.c. machine decoupling circuit defined in eqn dimr drive dt dt electromagnetic torque flux-linkage space phasor follows from eqn implementation induction machine input instantaneous values isyref leakage inductance linear magnetic conditions magnetizing flux magnetizing flux-linkage space magnetizing inductance magnetizing-current space phasor modulus obtained output parameters quadrature-axis stator current reactance reference frame fixed reference value rotor angle rotor currents rotor flux rotor flux-linkage space rotor magnetizing current rotor magnetizing-current space rotor reference frame rotor resistance rotor speed rotor time constant rotor voltage equations rotor-flux-oriented control rotor-flux-oriented reference frame saturation self-inductance shown in Fig slip angle special reference frame stationary reference frame stator and rotor stator current components stator flux linkages stator voltage equations stator windings stator-current space phasor substitution of eqn synchronous machine three-phase thyristor torque-producing stator current transformation two-axis components utilizing vector control