6
Brushless DC Motor
Topics Discussed
- ❖ Construction
- ❖ Principle of Operation
- ❖ Magnetic Open Circuit Analysis
- ❖ Torque and EMF Equation
- ❖ Speed Torque Characteristics
- ❖ Closed Loop Control
6.1 Introduction
The advent of brushless DC (BLDC) motor was due to the development of efficient power electronic devices, circuits and radially magnetized materials. BLDC motors exhibit similar characteristics to that of DC motors without mechanical brushes. This is possible by employing an electronic commutator (three phase inverter) and a rotor position sensor. BLDC motors are used in applications which require smooth speed and position control. It has high efficiency, high torque density and high power factor but requires the use of rotor position ...
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