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

摘要

PURPOSE: To obtain a high identification accuracy by a method wherein the reciprocal of the secondary time constant of an induction motor is identified in accordance with a signal which is not sensitive to a primary inductance. CONSTITUTION: A signal in an adaptive vector controller is taken out by the adaptive identification system 52 of a main control unit 5 as a source signal for the parameter adaptive identification. The reciprocal of a secondary time constant is identified in accordance with the source signal and a control setting value which is used when a slip angle frequency command value is generated and which corresponds to the reciprocal secondary time constant is renewed in accordance with the reciprocal secondary time constant value. As the source signals, not only design parameters but also a primary voltage command value and a primary current value on fixed coordinates which are vector data or the rotation angular velocities of a rotor which are detected by a revolution detector 2 and which are scalar data or the slip angle frequency command values which are obtained from a vector setting system and which are also scalar data are used. With this constitution, a high identification accuracy can be obtained.