The major function of this
proposed research is to control the speed of the brushless DC motor with sensor
less control for four-switch three phase inverter. This proposed system is
simplified the topological structure of the conventional six-switch three phase
inverter. In this proposed method, a new structure of four-switch three phase
inverter？[1]？with reduced number of switches for system is introduced to
reduce the mechanical commutation, switching losses that occur in the？six-switch method. The proposed
inverter fed brushless DC motor used in sensorless control？schemes which is used for sensing
positioning signals. To improve sensor less control performance, four-switch
electronic commutation modes based proportional intergral controller？scheme is implemented. In this
four-switch three phase inverter reduction of switches, low cost control and
saving of hall sensor were incorporated. The feasibility of the proposed sensor
less control four-switch three phase inverter fed brushless DC motor drive is
implemented, analysed using MATLAB/SIMULINK, effective simulation results have
been validated out successfully.
References
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