Abstract
In this paper authours propose two different strategies of flux linkage estimation for sensorless FOC system of doubly-fed induction motor drive implementation. Possibility to measure currents and voltages of rotor and stator circuits in doubly-fed motor gives place to a simplier flux linkage observers model. Functional scheme of electric drive and two models of flux linkage observers are proposed - a model using the voltage and a model using the rotor current. The stability of the present field-oriented control system when implementing these flux-linkage estimations strategies are investigated using LabView software. The results of theoretical research are confirmed by simulation results in Matlab software.
Highlights
The development of microcontroller control systems has created new opportunities in power electronics and electric power industry
The functional schemes of flux linkage observers for electric drive based on doubly-fed induction motor in [14, 17] are presented
Is compensated in the control system compensation block, the final transfer function will look like: (5). In this strategy of the flux linkage estimation there is a mutual inductance parameter, which can be varies depending on the operating mode of the electric drive system [3, 11, 12, 14]
Summary
The development of microcontroller control systems has created new opportunities in power electronics and electric power industry. In the electric drive based on the doubly-fed induction motor with two power converters in rotor and stator circuits there is a possibility to measure the frequencies of currents and voltages in the rotor and the stator circuits. The functional schemes of flux linkage observers for electric drive based on doubly-fed induction motor in [14, 17] are presented. ), and the EMF is compensated in the control system compensation block, the final transfer function will look like: In this strategy of the flux linkage estimation there is a mutual inductance parameter, which can be varies depending on the operating mode of the electric drive system [3, 11, 12, 14]
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