The attitude information of spacecraft can be obtained by the sensors attached to it using a star tracker, three-axis magnetometer, three-axis gyroscope, and a global positioning signal receiver. By using these sensors, the spacecraft can be maneuvered by actuators that generate torques. In particular, electromagnetic-torque bars can be used for attitude control and as a momentum-canceling instrument. The spacecraft momentum can be created by the current through the electrical circuits and coils. Thus, the current around the electromagnetic-torque bars is a critical factor for precisely controlling the spacecraft. In connection with these concerns, a solar-cell array can be considered to prevent generation of a magnetic dipole moment because the solar-cell array can introduce a large amount of current through the electrical wires. The maximum value of a magnetic dipole moment that cannot affect precise control is 0.25 A·m², which takes into account the current that flows through the reaction-wheel assembly and the magnetic-torque current. In this study, we designed a 300-W solar cell array and presented an optimal wire-routing method to minimize the magnetic dipole moment for space applications. We verified our proposed method by simulation.

1. INTRODUCTION
2. DESIGN OF THE 300-W SOLAR-CELL ARRAY
    2.1 Electrical Design of the 300-W Solar-Cell Array
    2.2 Mechanical Design of the 300-W Solar-Cell Array
3. ANALYSIS OF THE MAGNETIC DIPOLE MOMENTOF THE ARRAY
    3.1 Magnetic Dipole Moment
    3.2 Magnetic Dipole Moment of the 300-W Solar-Cell Array
4. CONCLUSION
REFERENCES

• Goo-Hwan Shin(Satellite Technology Research Center, Korea Advanced Institute of Science and Technology) Corresponding Author
• Dong-Guk Kim(Satellite Technology Research Center, Korea Advanced Institute of Science and Technology)
• Se-Jin Kwon(Satellite Technology Research Center, Korea Advanced Institute of Science and Technology/Department Aerospace Engineering, Korea Advanced Institute of Science and Technology)
• Hu-Seung Lee(Department of Mechanical and Metallurgical Engineering Education, Chungnam National University)