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**8** 

**Architectural Design Criteria for** 

Scope of this chapter is to provide design criteria for spacecraft solar arrays at system level. The design a satellite solar array is usually influenced by several constraints; mission profile,

Moreover, its design has to be harmonised with the chosen solar array power conditioning, in order to optimize mass, dimensions, and also particular constraints coming from EMC

1. General description of the current solar cell technologies currently used in space, with

2. Mathematical model of an equivalent solar cell circuit, to be used for performance

3. Mathematical description of a simplified thermal model of a solar array in order to

6. The impact of the power conditioning architecture on the solar array (electrical

9. Numerical simulations of solar array performances as function of the mission profile

Since the beginning of the astronautic era, photovoltaic devices have been considered for the generation of electrical power on board spacecrafts because of their high power output per unit mass, associated with the fundamental advantage of not having moving parts, present, instead, in all the most used electrical power generators for both terrestrial and aeronautical applications (turbines, motors, alternators, etc.). Therefore the PV array is static, does not produce vibrations or noise, and does not need an active cooling. The Russians were the

chosen attitude, overall spacecraft configuration, mass and sizing requirements, etc.

The chapter is basically composed of the following sections;

particular attention to the triple junction solar cells.

calculations in a numerical simulation environment.

5. The satellite power budget, starting point for the solar array sizing

7. The configuration of the solar array with respect to the spacecraft. 8. Some design examples for different missions and satellite configurations.

first, in 1958, to launch a satellite powered with silicon solar cells.

(orbit propagation, slew manoeuvres, attitudes of particular interest).

analyse solar array performances in orbit. 4. Short definition of cosmic radiation effects.

operative point, EMC considerations).

**2. Solar cells for space applications** 

**1. Introduction** 

and thermal environments.

**Spacecraft Solar Arrays** 

Antonio De Luca *VEGA Space GmbH* 

*Germany* 

Werner, J.H.; Dassow, R.; Rinke, T.J.; Köhler, J.R. & Bergmann, R.B. (2001). From polycrystalline to single crystalline silicon on glass. *Thin Solid Films*, Vol. 383, pp. 95- 101
