ADAPTIVE SLIP FREQUENCY TYPE VECTOR CONTROL METHOD AND ADAPTIVE SLIP FREQUENCY TYPE VECTOR CONTROLLER OF INDUCTION MOTOR

摘要

PURPOSE: To avoid the harmful influence of a vector control system upon an adaptive identification system and, further, make the superposition of an AC signal unnecessary by a method wherein the value of a motor parameter is identified on fixed coordinates which is independent from secondary flux coordinates. ;CONSTITUTION: The adaptive vector controller of an induction motor 1 has a rotation angular velocity detector 2, a current detector 3, a 2-phase/3-phase converter 4, a vector control system 51, a main control unit 5 composed of an adaptive identification system 52 and a power converter 6. Instead of employing a signal depending upon the structure of the vector control system 51, a primary voltage value, a primary current value and the rotation angular velocity or the slip frequency command value on fixed coordinates which are independent from the structure of the vector control system 51 are employed and a secondary resistance is identified in the fixed coordinates which is independent from the rotary coordinates which is used for the control of the vector control system 51 to facilitate the design of the adaptive identification system 52 independently from the structure of the vector control system 51. Therefore, the harmful influence of the vector control system upon the adaptive identification system can be avoided.;COPYRIGHT: (C)1997,JPO