Operating Standby Redundant Controller to Improve Voltage-Source Inverter Reliability

This paper presents a digital control architecture that demonstrates operating standby redundancy for a voltage-source inverter (VSI) controller. The reliability analysis shows the increased lifetime of the VSI using a standby redundant controller. The VSI control system is designed to switch from the primary to the secondary controller when a fault to the primary controller occurs. Simulated and experimental results validate that the redundant controller design switches between field-programmable gate-array-based redundant controllers with no measurable disturbance to the output voltage.