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An analysis of the field acceleration method and of vector control of induction motors
Author(s) -
Tsuji Mineo,
Yamada Eiji,
Yamada Katsuhiro,
Oyama Jun
Publication year - 1993
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391130309
Subject(s) - stator , control theory (sociology) , vector control , acceleration , transient (computer programming) , induction motor , rotor (electric) , torque , physics , constant (computer programming) , vector field , equivalent circuit , field (mathematics) , steady state (chemistry) , mathematics , computer science , mechanics , classical mechanics , control (management) , voltage , chemistry , quantum mechanics , artificial intelligence , pure mathematics , thermodynamics , programming language , operating system
The two‐axis theory and vector control based on this theory are well known. On the other hand, Yamamura has proposed the phase segregation method (spiral vector method) for the analysis of induction motors along with the field acceleration method (FAM). In this paper these analytical and control methods are compared. We begin by analyzing the equations for phase segegation, which contain information derived from the three‐phase stator and rotor equations. We next demonstrate that the vector control system for constant rotor flux is obtained from the type T‐I type field acceleration method when the transient term is zero. By By using the equivalent circuit for a T‐I transient, we readily obtain the desired vector control system, because the circuit is identical to the steady‐state circuit when the rotor flux is constant. An analytical solution of the transient response for the vector control system is obtained for arbitrary initial conditions. Finally, the stability of type T ‐II FAM is discussed, with special emphasis on the effect of changes in stator resistance, by computing the torque transfer function. When the stator resistance is correctly estimated, pole‐zero cancellation occurs on the imaginary axis.