ABSTRACT
This chapter treats the three-phase coordinate model and its parameter equivalence with its dq model derivation, dq (space phasor or complex variable or vector) model of IMs, magnetic saturation and skin effect in the dq model of IMs, space phasor steady-state equations and performance (with a numerical example), doubly fed (wound rotor) IM steady state by a numerical example, electromagnetic transients (sudden short-circuit case study, transient current at zero speed), small-deviation and large-deviation electromechanical transients (with starting transient case study)), reduced-order dq model for IM transients, other (most severe) transients, m/Nr actual rotor winding modeling of IMs with cage faults.
Controlled magnetic flux and variable frequency transients, complex eigen values of IM space model, cage rotor IM constant rotor flux transients, vector control principle and generic structural diagram, with an extended numerical example, cage-rotor IM constant stator flux transients and vector control and generic structural diagram, constant rotor flux and vector control principles of doubly fed (wound rotor) IMs, the doubly fed IM as brushless d.c. exciter for SMs equations (with a numerical example).
IM parameter estimation at standstill (flux decay tests, standstill frequency tests, split capacitor IM tests (phase variable and dq models), linear induction motor tests, line-start and self-synchronizing of premium efficiency PM-assisted split-phase IMs, a Summary and 15 proposed problems constitute a rather comprehensive treatment of IM transients and control principles (29 figures and 157 equations).
