Design and Implementation of On-board Electrical Power ... - OUFTI-1

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6.3.3 TestsThe engineering model of the EPS card was tested. The complete description and the results ofthe most important tests can be found in the test report [1]. All the systems of the engineeringmodel of the EPS card except the measurement system were tested, with temperature rangeof -30 ◦ C to 70 ◦ C. The results were satisfying, except the 7.2V converter. The 7.2V converterproduces a stabilized voltage of 7.2V and is stable, but a gain margin of 1 dB was measuredunder particular conditions.96
Chapter 7Miscellanous activities,presentations and publications7.1 Publications1. Document including schematics, list of components, datasheets and specifications (electrical,mechanical and thermal) for the production of the engineering model of the EPSby Deltatec.2. Document about the choice of components for OUFTI-1.3. Document explaining how to integrate the behavior of the EPS into an operationalsimulator of OUFTI-1 (this simulator is presented in [6]).4. Progress reports for the ESA.5. (...)7.2 Presentations1. Presentation to high-school students - Posters and demos, as part of “L’Espace j’enrêve´´, EuroSpace Center, Redu, Belgium, 1 Oct. 2008.2. Public presentation, “The first nanosatellite developed at the University of Liège”, SpaceDays, Liège, Belgium, 7 Oct. 2008.3. Presentation to other CubeSat teams, ESA Second European CubeSat Workshop, ESA/ESTEC,Noordwijk, The Netherlands, 20-22 Jan. 2009.4. Presentation to other CubeSat teams, 6th Annual CubeSat Developer’s Workshop, CaliforniaPolytechnic State University, San Luis Obispo, 22-25 Apr. 200997
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AcknowledgementsI want to thank the
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Contents1 Introduction 91.1 Cubesat
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4.4.2 Mean case . . . . . . . . . .
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B Power budget worksheet 106C Pictu
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design and the tests are delegated
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Chapter 2Requirements of the EPS2.1
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• The Single-Event Upset (SEU)Thi
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the P-POD. RBF pins must fit within
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Figure 2.6: Top view of the PC104 c
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Chapter 3Design of EPS architecture
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• Voltage (4) and current (5) at
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Figure 3.6: The equivalent circuit
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of our Lithium-Polymer batteries va
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Figure 3.12: I-V curve of a solar p
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3.3.3 CapacityA important value to
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Parameter SLPB723870H4 SLPB554374HN
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of the batteries is kept between -2
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Over Charge Prohibition 4.275 ± 0.
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supplied in 5V. The circuit will be
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Chapter 4The Power Budget4.1 Introd
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Figure 4.1: P-V curve of a solar pa
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4.3.2 Efficiency of convertersTo at
Page 46 and 47: Figure 4.3: Consumptions in % in me
Page 48 and 49: Chapter 5Electrical Design of EPS5.
Page 50 and 51: V outV in= D. (5.1)Since D ≤ 1, t
Page 52 and 53: The power losses in the inductor ar
Page 54 and 55: ∆i L,1 + ∆i L,2 = 0, (5.16)V in
Page 56 and 57: Using the value of ∆i L given by
Page 58 and 59: There is no data about the case to
Page 60 and 61: Capacitor selectionFour 10µF ceram
Page 62 and 63: • Output voltage: 5V.• Maximum
Page 64 and 65: Figure 5.12: Burst mode operation (
Page 66 and 67: Figure 5.14: Simplified schematics
Page 68 and 69: Figure 5.15: Worksheet for 3.3V con
Page 70 and 71: sequently, the k was chosen above 0
Page 72 and 73: where G 1 is the initial control-to
Page 74 and 75: Figure 5.21: Measured Bode diagram
Page 76 and 77: Figure 5.26: Equivalence between th
Page 78 and 79: C f =12πf f R 0f,L f = R 2 0f C f
Page 80 and 81: Figure 5.37: Schematics of the firs
Page 82 and 83: R KR >1.45V100mA − 1.3A35= 23.07
Page 84 and 85: The schematics is shown on figure 5
Page 86 and 87: A commercial model meets all requir
Page 88 and 89: Figure 5.45: Schematics of the heat
Page 90 and 91: PrefixX7X5Y5Z5SuffixTemperature ran
Page 92 and 93: 6.2.1 The second dissipation system
Page 94 and 95: • The antenna deployment system.
Page 98 and 99: 7.3 ActivitiesAs OUFTI-1 is designe
Page 100 and 101: 8.1.2 DesignA model of Li-Po batter
Page 102 and 103: [15] Fabien Jordan, Phase B Electri
Page 104 and 105: TaK = 273 + TaC;%Photo-current ther
Page 106 and 107: Appendix BPower budget worksheetIn
Page 108 and 109: 108
Page 110 and 111: Appendix CPictures of the prototype
Page 112 and 113: Appendix DSchematics of the enginee
Page 114 and 115: 876543213V3 CONVERTER AND INPUT FIL
Page 116: 87654321ANTENNA DEPLOYMENT CIRCUITB
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