Abstract
This paper describes a newly developed parameter identification method of induction machine. Identification procedure consists of two steps: one is at initial state of standstill and the other is at operating state. In each step, on-line identification of parameters indispensable to description of machine dynamics can be realized by observing behaviors of stator current and voltage. They are stator winding self-inductance, transient inductance, rotor circuit time constant and stator winding resistance. At standstill state, they are identified from stator voltage wave to ramp current. At operating state these parameters are also identified by solving a set of equations obtained from vectorial relation between stator current and voltage. This identification technique is applied to PWM drive system and can lead to parameter self-tuning in ac servo control system.
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