A Bridge Type DC-DC Converter fed BLDC Motor Drive for Household Appliances

Nowadays, conventional AC and DC Motors are being replaced by Special Electrical Machines starting from household appliances to e-Vehicle manufacturing. The conventional machine suffers from many drawbacks such as wear and tear problem, low efficiency and starting torque, sparking in brushes and requirement for frequent maintenance. A PM Brushless DC Motor helps in overcoming the above problems, in which the stator winding is being excited by a three phase AC supply and the rotating part consists of permanent magnets. And since the commutation is carried out using power electronic switches, ripples are generated in the torque waveform thereby affecting the supply side power-factor. In-order to control this power quality issue, a bridge type DC-DC converter fed PM-BLDC motor is proposed in this paper. A suitable prototype is developed and analyzed using MATLAB/Simulink platform, to determine its performance. The results show that the distortion in the speed and the stator current waveform have been considerably reduced.