Abstract:
In this paper, a functional simulation model for a Four-Switch, Three-Phase Inverter
(FSTPI) Brushless DC (BLDC) motor using switching function concept is presented
and the actual implementation of the model is proposed with the help of
Matlab/Simulink. In this model an entire BLDC motor drive including power
conversion unit, BLDC motor, and speed control system, is investigated. The proposed
model is exact and easy for implementation. Using this concept, it is possible to show
he detailed electrical variables, such as phase current, line and phase voltages and diode
and switch currents. Duo to problems caused of eliminating two power switches, Direct
Current Control (DCC) method is carried out in the simulations. The validity of the
proposed model is validated by simulation and experimental results.