국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Lunar PMAD Technology Assessment
저자	Kenneth J. Metcalf
Keyword	Power conditioning; Power converters
URL	http://gltrs.grc.nasa.gov/reports/1992/CR-189225.pdf
보고서번호	NASA CR-189225
발행년도	1992
출처	NASA Glenn Research Center
ABSTRACT	The purpose of this report is to document the initial set of power conditioning models created to estimate power management and distribution (PMAD) component masses and sizes. This first set contains converter, rectifier, inverter, transformer, remote bus isolator (RBI), and remote power controller (RPC) models. The objective is to form a library of PMAD models that will allow system designers to assess various power system architectures and distribution techniques quickly and consistently. It is recommended that the models developed during this study only be used for conceptual design studies which require "ballpark" PMAD mass estimates. To determine specific PMAO design choices such as component topologies, and transmission and distribution voltages and frequencies requires specific power system requirements and more detailed analyses. These models are designed primarily for space exploration initiative (SKI) missions that require continuous power and support manned operations. The model development is based on the fact that power conditioning components have common stages and that their interconnection and control determines the function and operation of the component. The stages contained in a component are defined, their masses calculated, and the control and monitoring, enclosure, and thermal management masses are added to determine the mass of the complete component. The models are based on components that use passive or active thermal management and they estimate component heat sink, coldplate, and radiator masses (the masses of pumps, plumbing, etc. are not included). The model documentation explains the component equations, including their constants and exponents; identifies model limitations; specifies valid input ranges; and discusses methods for applying the component models. A separate section explains how to link individual models to form a complete power transmission and distribution system model. Before creating the power conditioning models, a power element technology assessment was conducted to gauge the amount of advancement one could reasonably expect by the year 2000.