19-06-2010, 11:48 AM
Abstract:
The Brush less DC electric motor are synchronous electric motors powered by direct-current (DC) electricity and having electronic commutation systems, rather than mechanical commutators and brushes. The current-to-torque and voltage-to-speed relationships of BLDC motors are linear.Brushless DC electric motor (BLDC) described as Stepper motors, with fixed permanent magnets and possibly more poles on the stator than the rotor, or Reluctance motors. BLDC is most popular motor choice for model aircraft. because Brush less DC electric motor gives favorable power to weight ratios and large range of available sizes, from under 5 grams to large motors rated at thousands of watts .some other applications of the BLDC is role as a motor for computer hard drives and CD/DVD players and toys
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http://en.wikipediawiki/Brushless_DC_electric_motor
http://electronics.howstuffworksbrushless-motor.htm
