In this paper, a sensorless field oriented control system of five-phase induction machine with the 3rd harmonic rotor flux is presented. Two vector models, α1-β1 and α3-β3, were transformed into d1-q1, d3-q3 models oriented in rotating frames, which correspond to the 1st and 3rd harmonic plane respectively. The authors proposed the linearization of the model in d-q coordinate frames by introducing a new variable “x” which is proportional to the electromagnetic torque. Based on the static feedback control law, a dual mathematical model of the fivephase induction machine was linearized to synthesize a control structure in which electromagnetic torque and the rotor flux in each plane can be independently controlled. The control system proposed includes two uninfluenced subsystems (related to the 1st and 3rd harmonic), which are specifically synchronized to obtain a quasi-trapezoidal air gap flux distribution. This pattern provides a better iron utilization without saturating it, which consequently, increases the output torque. To accomplish a sensorless control configuration the state machine’s variables and the rotor speed are estimated by an extended speed observer. The proposed control algorithm was verified on an experimental setup. The results presents the desired air gap flux in steady as well transient states under various load conditions.
Authors
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.1109/cpe.2017.7915203
- Category
- Aktywność konferencyjna
- Type
- materiały konferencyjne indeksowane w Web of Science
- Language
- angielski
- Publication year
- 2017
