Sensorless control of an induction machine with an SOGI based MRAS observer and a phase locked loop

In this paper, a sensorless speed control for an induction machine is proposed. The adaptive model reference system (MRAS) based on a second order generalised integrator (SOGI) uses the phase currents and control voltages in combination with the motor parameters to estimate the internal voltages of...

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Vydané v:12th International Conference on Power Electronics, Machines and Drives (PEMD 2023) Ročník 2023; s. 189 - 195
Hlavní autori: Aubele, F., Schwarz, U., Staiger, J., Steinhart, H.
Médium: Konferenčný príspevok..
Jazyk:English
Vydavateľské údaje: The Institution of Engineering and Technology 2023
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Shrnutí:In this paper, a sensorless speed control for an induction machine is proposed. The adaptive model reference system (MRAS) based on a second order generalised integrator (SOGI) uses the phase currents and control voltages in combination with the motor parameters to estimate the internal voltages of the machine, from which the rotor speed and position can be calculated. The use of the extended MRAS observer in combination with a phase-locked loop (PLL) should lead to improved dynamics, stability, precision, and a wider speed range of the drive system. First, a field-oriented control (FOC) is implemented in a simulation with the model of an induction machine, in which the function of the MRAS observer can subsequently be tested. In the following, a test bench is set up to implement the control algorithms on a microcontroller. Furthermore, an algorithm for speed estimation via the slip of an induction machine is implemented. The results and measurements listed are exclusively hardware-based and were carry out on the test bench. Finally, the observer is operated in combination with slip compensation in order to compensate for the load-dependent deviation of the mechanical angular velocity of an induction machine.
DOI:10.1049/icp.2023.1997