Reliability and Performance Improvement of PUC Converter Using a New Single-Carrier Sensor-Less PWM Method With Pseudo Reference Functions

A new single-carrier sensor-less pulsewidth modulation (PWM) method using suggested pseudo reference functions is proposed for packed U-cell (PUC) converter to improve performance and reliability of the PUC converter. It composed one PWM carrier signal two functions. By employing method, dc capacitor voltage ripple substantially decreased, faster balancing obtained. Moreover, power losses are evenly distributed among all switches. Consequently, notable reduction even distribution loss switches enhance converter's lifetime. In addition, odd multiples switching harmonic clusters eliminated from output voltage; thus, values passive filter components halved. Hence, applying remarkably improves performance, density, reliability, lifetime notably simplifies implementation pattern. Provided experimental results comparisons as well analysis verify viability effectiveness method.