The speed of the BLDC motor
is controlled by varying the dc-bus voltage of a voltage source inverter (VSI)
which uses a low frequency switching of VSI (electronic commutation of the BLDCmotor)
for low switching losses.
A diode bridge rectifier followed by a Cuk converter
working in a discontinuous conduction mode (DCM) is used for control of dc-link
voltage with unity power factor at ac mains.
Performance of the PFC Cuk
converter is evaluated under four different operating conditions of
discontinuous and continuous conduction modes (CCM) and a comparison is made to
select a best suited mode of operation.
The performance of the proposed system
is simulated in aMATLAB/Simulink environment and a hardware prototype of the
proposed drive is developed to validate its performance over a wide range of
speed with unity power factor at ac mains.
No comments:
Post a Comment