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This paper presents a comprehensive control scheme for complete position sensorless operation of a Permanent Magnet Brushless DC Motor (PMBLDCM), for variable speed applications. An approach based on initial rotor alignment from any position is used along with an open loop speed up. During alignment of rotor, phase currents are controlled by pulse width modulation (PWM) of voltage source inverter...
This paper proposes a boost converter for power quality improvement at input AC mains of a permanent magnet brushless DC motor (PMBLDCM) operated under position sensorless control. Presently hall sensors are used as position sensors in PMBLDCM and its signals are utilized for starting and control of PMBLDCM under various operating conditions. For the position sensorless control, back-EMF signal of...
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