Saturday, 12 December 2015

BrushLess DC MOTOR DRIVE WITH POWER FACTOR CORRECTION

  • This article presents a power factor correction (PFC)-based bridgeless canonical switching cell (BL-CSC) converter-fedbrushless dc (BLDC) motor drive.
  •  The proposed BL-CSC converter operating in a discontinuous inductor current mode is used to achieve a unity power factor at the ac mains using a single voltage sensor.
  •  The speed of the BLDC motor is controlled by varying the dc bus voltage of the voltage source inverter (VSI) feeding the BLDC motor via a PFC converter.



  •  Therefore, the BLDC motor is electronically commutated such that the VSI operates in fundamental frequency switching for reduced switching losses. 
  • Moreover, the bridgeless configuration of the CSC converter offers low conduction losses due to partial elimination of diode bridge rectifier at the front end. 
  • The proposed configuration shows a considerable increase in efficiency as compared with the conventional scheme.
  •  The performance of the proposed drive is validated through experimental results obtained on a developed prototype. 
  • Improved power quality is achieved at the ac mains for a wide range of control speeds and supply voltages.
  •  The obtained power quality indices are within the acceptable limits of IEC 61000-3-2.

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