Open Circuit Fault Diagnosis and Fault Tolerance of Three-Phase Bridgeless Rectifier

Abstract

Bridgeless rectifiers are widely used in many applications due to a unity power factor, lower conduction loss and high efficiency, which does not need bidirectional energy transmission. In this case, the potential failures are threatening the reliability of these converters in critical applications such as power supply and electric motor driver. In this paper, open circuit fault is analyzed, taking a three-phase bridgeless as an example. Interference on both the input and output side are considered. Then, the fault diagnosis method including detection and location, and fault tolerance through additional switches are proposed. At last, simulation and experiments based on the hardware in loop technology are used to validate the feasibility of fault diagnosis and fault tolerance methodology.

Improving a battery charger architecture for electric vehicles with photovoltaic system

“…In order to reduce the loss of rectifier bridge transmission, different topologies have been developed. Because of the unity power factor, low transmission loss, low THD, and high efficiency, bridgeless rectifiers are widely used in many applications . In addition, the bridgeless PFC topology has fewer semiconductor devices than conventional boost topology on the current path .…”

“…Because of the unity power factor, low transmission loss, low THD, and high efficiency, bridgeless rectifiers are widely used in many applications. [28][29][30] In addition, the bridgeless PFC topology has fewer semiconductor devices than conventional boost topology on the current path. 29,30 The modelled bridgeless PFC rectifier topology with ACM control structure is shown in Figure 9.…”

“…[28][29][30] In addition, the bridgeless PFC topology has fewer semiconductor devices than conventional boost topology on the current path. 29,30 The modelled bridgeless PFC rectifier topology with ACM control structure is shown in Figure 9. ACM control method was applied to a successfully designed bridgeless rectifier.…”

“…The switches (Q 1 ) and (Q 2 ) are operated synchronously turned ON and OFF, which is named synchronous control process. [29][30][31] State 1 (positive cycle): Both switches are ON state, the current flows on the switches body diodes, the electrolytic capacitor supplied current to the load in the discharged process ( Figure 9A).…”

“…where D is the duty cycle, V in is grid voltage, V out is load voltage, C is load capacitor, L is the equivalent inductor. [29][30][31] The voltage and current signals of the bridgeless rectifier system are shown in Figure 10.…”