Hybrid Cascaded Bridgeless (HCB) is a high-voltage topology for transmitting energy unidirectionally. The topology can be used as a rectifier stage of a new generation of high-voltage inverter without a line-frequency transformer. A Hybrid Cascaded Bridgeless Rectifier (HCBR) can operate with a unity-power factor efficiently, and a large number of fully-controlled devices will be saved. Because of the special nature of its work process, DC-voltage ripples of two types of cascaded bridges are different. This will affect the power supply for the same DC loads. So, the reasons for DC voltage ripple are analyzed based on the control principle of HCBR. The suitable DC reference voltage for HCBR is deduced. In addition, a design method of DC capacitor value for H-bridge and bridgeless is presented. Finally, simulation results verify the correctness of the theoretical analysis. This work is supported by National Key Research and Development Program of China (No. 2018YFC0604502), Science and Technology Key Project of Henan Province (No. 192102210228), and Doctoral Fund of Henan Polytechnic University (No. 660807/013).