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Brushless DC Motors
Significance of brushes in DC Motors
Brush- A contact for supplying or taking electrical energy to a rotatory component
Commutatorand brush arrangement is a mechanical rectifier
Need for brushless motors
Wear and tear in carbon brushesconsof
Brush contact drop
To eliminate the above consequences brushless DC motors are developed.
Electronic controllers replaced the mechanical rectifiers resulting in maintenance less motors.
Disassembledview of a BLDC Motor
Bldcmotor= PMAC motor +Electroniccommutator
Brushed motorvsBrushless motors
Less maintenance and lessnoise
Small in Size
High Initial Cost
Hard Disk drives
Speed Torque curve
Have I made myself clear???
Publish on 26th April 2015 Category: All 44