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This paper presents design and implementation of a bi-directional inverter, including a high frequency transformer, a push-pull switch configuration at the dc side, a cycloconverter at the ac side, and a dsPIC controller. The dc/ac conversion is achieved with a phase-shifted control strategy. In addition, this topology also can achieve an ac/dc conversion with the PFC function. In this circuit, the...
This paper presents a survey on existing methods for fault diagnosis and protection of IGBT's, with special focus on those used in three-phase power inverters. Twenty one methods for open-circuit faults and ten methods for short-circuit faults are evaluated and summarized, based on their performance and implementation efforts. The gate-misfiring faults and their diagnostic methods are also briefly...
The reliability of the VSI (Voltage Source Inverter) components such as semi-conductor switches is critical for the shunt active power filters. A failure in one of the switches decreases system performances and usually leads to disconnect the filter. So, to prevent such undesirable events, real-time fault detection, isolation and compensation must be implemented. This paper proposes new robust fast...
Fault diagnostics of power converters have drawn increasing attentions due to the widespread adoption of advanced power control devices, such as motor drives and uninterruptible power supplies. This paper presents a literature survey on existing methods for fault diagnosis and protection of IGBTpsilas, with special focus on those used in three-phase power inverters. Eleven methods for open-circuit...
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