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A model-free control scheme is proposed for a surface mounted permanent magnet synchronous motor (SMPMSM) drive system with parametric uncertainties and inverter nonlinearity. Using only the input and output data of system, the ultra-local model of SMPMSM system is first set up and the proposed ultra-local model is able to accurately identify the nonparametric model of SMPMSM system with the unknown...
A general stimulation method is proposed to identify induction motor (IM) parameters based on inverter at standstill without the need of inverter nonlinearity compensation. Inverter non-linear characteristics are one of the major sources of parameters identification inaccuracies because the voltage error caused by inverter nonlinearity is difficult to compensate for accurately. To overcome the influence...
This paper describes the results of the experiment with an application of the outer torque observer to the radial fan driven by induction motor fed from the voltage inverter. The observer is designed to be an additional stand-alone device connected between the induction motor and the power supply, separated from the inner signals of the inverter controller. The inputs for the observer algorithm are...
For the high-performance sensor-less vector control of an induction motor, the accuracy of the motor parameters has an important impact on the performance of the whole system. In this paper, we propose a novel method for the offline identification of motor parameters. In our method, first we use DC or single phase AC as an excitation signals. Then we measure the voltage of DC bus and current of stator...
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