Abstract
This paper presents a new method to improve sensorless performance of matrix converter drives using PQR power transformation. The non-linearity of matrix converter drives such as commutation delay, turn-on and turn-off time of switching device, and on-state switching device voltage drop is modelled using PQR transformation and compensated using a reference current control scheme. To eliminate the input current distortion due to the input voltage unbalance, a simple method using PQR transformation is also proposed. The proposed compensation method is applied for high performance induction motor drives using a 3 kW matrix converter system without a speed sensor. Experimental results are shown to illustrate the feasibility of the proposed strategy.
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Lee, KB., Blaabjerg, F. Performance improvement of sensorless vector control for matrix converter drives using PQR power theory. Electr Eng 89, 607–616 (2007). https://doi.org/10.1007/s00202-006-0041-3
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DOI: https://doi.org/10.1007/s00202-006-0041-3