Fault-tolerant control apparatus under the open-circuit fault condition of 3-phase AC/DC PWM converter and method thereof

摘要

reference voltage in accordance with a space vector pulse width modulation (Space Vector Pulse Width Modulation) switching signal input received the open circuit fault tolerant device of the three-phase AC / DC PWM converter is started to operate . The fault-tolerant control system for applying a switching signal for fault diagnosis unit , and if the failure diagnosis by the failure diagnosis unit space vector pulse width modulated control in place of the switching signal which allows failure diagnosis to an open-circuit failure of the converter to converter and a fault tolerant controller . Thus harmonics and unbalance between each phase is included in the open-circuit fault current at the voltage of the DC bus reduces pulsation also reduced significantly . ;