Development and testing of a source subsystem for the supporting development PMAD DC test bed

The supporting Development Power Management and Distribution (PMAD) DC test bed is described. Its benefits to the Space Station Freedom Electrical Power System design are discussed along with a short description of how the PMAD DC test bed was systematically integrated. The source subsystem of the PMAD DC test bed, consisting of a Sequential Shunt Unit (SSU) and a Battery Charge/Discharge Unit (BCDU), is introduced. The SSU is described in detail and component-level test data is presented. Next, the BCDU's operation and design are given along with component-level test data. The Source Subsystem is then presented and early data given to demonstrate an effective subsystem design.