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首页> 外文会议>Space Technology amp; Applications International Forum (STAIF-99) ptol January 31-February 4, 1999, Albuquerque Hyatt Hotel, NM >Impact of radiation hardness and operating temperatures of s ilicon carbide electronics on space power system mass
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Impact of radiation hardness and operating temperatures of s ilicon carbide electronics on space power system mass

机译：碳化硅电子器件的辐射硬度和工作温度对空间动力系统质量的影响

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The effect of silicon carbide (SiC) electronics operating temperatures on Power Management and Distribution (PMAD), or Power COnditioning (PC), subsystem radiator size and mass requirements was evaluated for three power output levels (100 kW_e, 1 MW_e, and 10 MW_3) for near term technology (i.e. 1500 K turbine inlet temperature) Closed C6ycle Gas STurbine (CCGT) power systems with a High Temperature (Gas Reactor (HTGR) heat source. The study was conducted or assumed PC radiator temperatures ranging from 370 to 845 K and for three scenarios of electrical energy to heat conversion levels which needed to be rejected to space by means of the PC radiator. In adition, during part of the study the radiation hardness of the PC electronics was varied at a fixed separation distance to estimate its effect on the mass of the instrument rated reactor shadow shield. With both the PC radiator and the conical shadow shield representing major components to the overall powery system the influence of the above on toal power system mass was also determined. As expected, results show that the greatest actual mass savings achieved by the use of SiC electronics occur with high capacity power systems. Moreover, raising the PC radiator temperature above 600 K yields only small additional system mass savings. The effect of increased radiation hardness on total system mass is to reduce system mass by virtue of lowering the shield mass.
机译：针对三种功率输出水平（100 kW_e，1 MW_e和10 MW_3），评估了碳化硅（SiC）电子设备工作温度对电源管理和分配（PMAD）或电源分配（PC），子系统散热器尺寸和质量要求的影响。 ）用于短期技术（即1500 K的涡轮机入口温度）具有高温（燃气反应堆（HTGR）热源）的封闭式C6核燃气轮机（CCGT）电力系统，该研究是进行或假定PC散热器的温度范围为370至845 K以及三种需要通过PC散热器将其转化为电能的热能转换水平方案，此外，在部分研究过程中，PC电子器件的辐射硬度以固定的间距变化，以估算其辐射强度。对仪器额定反应堆屏蔽罩质量的影响。PC辐射器和圆锥形屏蔽罩都是整个动力系统的主要组成部分还确定了总功率系统质量的上述e。如预期的那样，结果表明，使用SiC电子设备实现的最大实际质量节省是在大功率电源系统中实现的。此外，将PC散热器温度提高到600 K以上只会节省少量额外的系统质量。辐射硬度增加对整个系统质量的影响是通过降低屏蔽质量来降低系统质量。

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