A wavelet study of sensorless control of brushless DC motor through rapid prototyping approach

This study provides information about the wavelet study of the brushless DC (BLDC) motor, which ultimately be used for sensorless control. The Matlab/Simulink model and its combination with dSpace DS2201 DSP unit are used to form a rapid control prototyping set-up. The Doubechies wavelet decomposition method has been applied to the recorded input-phase current-waveforms of the test motor. It has been shown that, commutation instants of inverter switches can be clearly detected without any position sensor.