Switched-Capacitor Voltage Boost Converter for Electric Vehicle Drives

This article presents a Switched-Capacitor (SC) voltage boost converter and its control methods for implementing dc-ac and ac-dc power conversion. This Switched-Capacitor Converter uses switched capacitor instead of inductor as used in traditional voltage source inverter to increase and decrease voltage from battery of any dc or ac source. This Switched-Capacitor converter has many advantages over traditional voltage source inverter such as less cost and losses due to the absence of inductor in this Switched-Capacitor converter. It also reduces the size of the converter due to the absence of inductor coil. It also doubled the area of the linear modulation region and eliminating both the large inductor in the boost dc-dc stage and the large filtering capacitor, which leads to a higher energy density and lower cost. This converter can be used of ac-ac, dc-dc, ac-dc and dc-ac.