S. K. Shanmugam et al.
4. Conclusion
In this research, we significantly use sensorless control so for angle position hall sensing fully avoided. Brush-
less DC drives which is preferable for compact, low maintenance and high reliability system in order to reduce
the mechanical strength so it proposed and convenient simulation results are carried out. The simulation of the
brushless DC motor is done using the software MATLAB/SIMULINK whose back EMF, phase voltage phase
current, rotor speed waveform are analyzed and incorporated the speed of rotor is 800 rpm are analyse d. In this
proposed converter used less number of ins ulated b ipola r switche s whic h e valuate the conve nti o na l co nve rt er . In
this research, the back electromotive force compensating and direct current controlling for brushless DC motor
drives analyzed and switch leg failure are avoided. In this s cheme, the pulse width modulation is applied to high
side switches of the converter. This pulse width modulation scheme can eradicate the offset voltage in the back
electromotive force signal caused by the voltage drop of the insulated b ipolar ins ulator an d also increa se syste m
efficiency by reducing the conduction loss is achieved. This proposed converter used sensorless control opera-
tion. There are no hall sensors, therefore, the system becomes robust, optimized design of the brushless DC mo-
tor achieves higher efficiency and better speed, current is formulated.
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