nanopower deployable solar panel datasheet...molex pico-lock 1.50 mm pitch, right angle,...

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© 2019 GomSpace A/S

NanoPower Deployable Solar Panel Datasheet Deployable solar panel for 3U or 6U satellites

© 2019 GomSpace A/S All printed copies, and all electronic copies and versions except the one accessible on

the GomSpace A/S server, are considered uncontrolled copies used for reference only.

Datasheet NanoPower DSP

25 March 2019

DS 1018088 1.1

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Product name: NanoPower DSP

Document No.: 1018088

Revision: 1.1

Author: KLK

Approved by: JBJ

Approval date: 25 March 2019

Confidentiality Notice

This document is submitted for a specific purpose as agreed in writing and contains information,

which is confidential and proprietary. The recipient agrees by accepting this document, that this

material will not be used, transferred, reproduced, modified, copied or disclosed in whole or in

part, in any manner or to any third party, except own staff to meet the purpose for which it was

submitted without prior written consent.

GomSpace © 2019




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1 Table of Contents

2 OVERVIEW ............................................................................................................................................... 4

3 HIGHLIGHTED FEATURES ..................................................................................................................... 4

4 GRAPHICAL OVERVIEW ......................................................................................................................... 5

5 MOUNTING DESCRIPTION ..................................................................................................................... 6

5.1 90o Version .................................................................................................................................. 6

5.2 135 o Version ................................................................................................................................ 7

6 HARDWARE LAYOUT ............................................................................................................................. 8

6.1 Connectors................................................................................................................................... 8

6.2 Connector Location of P2C.......................................................................................................... 9

6.2.1 J1 – Parallel Connector 1 ............................................................................................................ 9

6.2.2 J2 – EPS Connector 2 ................................................................................................................. 9

6.3 Connector Location of DEPR..................................................................................................... 10

6.3.1 J1 – Connector to Deploy Burn PCB ......................................................................................... 10

6.3.2 P1 - Programming ...................................................................................................................... 10

6.3.3 P2 – GSSB Serial Connector..................................................................................................... 11

6.3.4 P3 - GSSB Serial Connector ..................................................................................................... 11

6.3.5 P5 – Cross Burn Connector ....................................................................................................... 11

6.4 Connector Location of GSSB .................................................................................................... 12

6.4.1 J1 – Fine Sun Sensor ................................................................................................................ 12

6.4.2 J2 – GSSB 2 .............................................................................................................................. 12

6.4.3 J3 – GSSB 3 .............................................................................................................................. 13

6.4.4 P1 – GomSpace Debug ............................................................................................................. 13

7 SOLAR CELL STRINGS ........................................................................................................................ 13

8 COARSE SUN SENSOR AND TEMPERATURE SENSOR .................................................................. 14

9 MOUNTING PLATE ................................................................................................................................ 14

9.1 Fine Sun Sensor on the 135o Version ....................................................................................... 14

10 RELEASE MECHANISM ........................................................................................................................ 15

11 REDUNDANCY RELEASE SYSTEM ..................................................................................................... 16

12 ABSOLUTE MAXIMUM RATINGS ......................................................................................................... 16

13 ELECTRICAL CHARACTERISTICS ...................................................................................................... 17

14 PHYSICAL CHARACTERISTICS ........................................................................................................... 17

15 DISCLAIMER .......................................................................................................................................... 17

16 MECHANICAL DRAWING ...................................................................................................................... 18

16.1 90 o ............................................................................................................................................. 18

16.2 90 o Main Panel .......................................................................................................................... 19

16.3 135 o ........................................................................................................................................... 20

16.4 135 o Main Panel ........................................................................................................................ 21

16.5 Stowed ....................................................................................................................................... 22




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2 Overview The GomSpace NanoPower Deployable Solar Panel (DSP) is designed to fit on the side of a 3U or 6U

satellites. It is composed of three panels connected with spring loaded hinges. During launch the panels are

folded to the side of the satellite. Once in space a release system deploys the panels.

The DSP comes in two versions, a 135° version and a 90° version. The CAD below, Shows the two DSP

variants. Both versions can be mounted on a 3U or a 6U.

3 Highlighted Features General

• 135° version with three panels with solar cells

• 90° version with two panels with solar cells

• Redundant panel release mechanism,

• GSSB connectors

• Coarse sun sensor

• External temperature sensor

• The 135 o comes with two GomSpace Fine Sun Sensors

• Mounting slots for antenna

• Operational temperature: -60°C to +80°C

Solar cells

• 30% solar panel efficiency

• Up to 1.15 W per cell in LEO

• Space qualified triple junction solar cell assemblies

• Cover glass included

• 30.18 cm2 effective area pr. solar cell

• Cell base material: GaInP/GaAs/Ge on Ge substrate

• Panel base material: Space qualified glass/polyimide laminate with 2 internal 70 μm copper planes.

• Cell bonding substrate: 1mil polyimide film with silicone pressure sensitive adhesive

• Silver - plated kovar interconnectors - 2 parallel interconnectors per string




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4 Graphical Overview The illustration below labels the different parts of the DSP and illustrates how the release mechanism and the

FSS goes through the holes in the panels. The FSS only goes through the first panel, and is party hidden by

the last panel, hence it cannot be used until the panels are released.




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5 Mounting Description The DSP can sit on either a 3U or a 6U satellite. The same DSP unit is designed to be able to be installed on

either side of a structure, so it is not designed as a left and right side. This implies that it can be mounted on

both large 3U and 6U sides. Do note that on a 6U satellite they can only be mounted on the 3U side, and not

the 6U side. On a 3U satellite they can be mounted on all four sides.

On the main panel mounted on the body of the satellite is a slot for a NanoSense Fine Sun Sensor (FSS),

canted 6° outwards.

5.1 90o Version

Below are shown different mounting configurations for the 90° version, with both one and two DSP’s.

Top v

iew

Su

n facin

g s

ide

Top v

iew

Su

n facin

g s

ide

Top v

iew

Su

n facin

g s

ide

Green – structure

Orange – panels

Black – solar cells




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5.2 135 o Version

Below are shown different mounting configurations for the 135° version, with both one and two DSP’s.

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op v

iew

S

un f

acin

g s

ide

Top v

iew

S

un facin

g s

ide

T

op v

iew

S

un f

acin

g s

ide

Green – structure

Orange – panels

Black – solar cells




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6 Hardware Layout The panel mounted on the structure has the following connectors.

6.1 Connectors Below is shown a drawing with the connector group names. Each of the three P2C (PCB to cable) groups are

the same and each of the DEPR (Deploy Release) and GSSB (GomSpace Sensor Bus) groups are the same.

The GSSB-B is not mounted on the panel, but comes loose with the DSP. The two DEPR is connected with a

harness that works as a redundant panel release mechanism.

P2C-A

DEPR-A

GSSB-A

GSSB-B (free placement)

P2C-B

DEPR-B

P2C-C




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6.2 Connector Location of P2C Connect to EPS. View chapter 7 for further details.

6.2.1 J1 – Parallel Connector 1

Molex Pico-Lock 1.50 mm pitch, right angle, 504050-0491.

Used to connect two parallel solar strings through one common EPS connection J2.

Only to be used for strings with a common sun view field.

Pin Description

1 Cathode

2 Cathode

3 Anode

4 Anode

6.2.2 J2 – EPS Connector 2


This connector has a diode in series between the solar cell Anode and the pins 3 and 4 on J2

Pin Description

1 Cathode

2 Cathode

3 Anode (blocking diode)

4 Anode (blocking diode)




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6.3 Connector Location of DEPR The DEPR’s is a two-part PCB, where the main part is where the connectors are mounted. The other half is a

small PCB (burn PCB) on the other side, part of the mechanical release mechanism, see 10. It contains a

burn resistors and release indicator system.

6.3.1 J1 – Connector to Deploy Burn PCB

Mouser 89898-302LF

Pin Description

1 B1_OUT

2 BURN_GND

3 B2_OUT

4 Burn Release IN

6.3.2 P1 - Programming

Samtec CLP-103-02-G-D-BE

Pin Description

1 GSSB_VCC

2 MISO

3 RESET

4 SCK

5 MOSI

6 GSSB_GND




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6.3.3 P2 – GSSB Serial Connector

Molex Pico-Lock 504050-0891

The pins on connector P2 and P3 are directly connected, so the fit into the rest of the GomSpace GSSB using

products, like e.g. GomSpace Interstage GSSB.

Pin Description

1 BURN_GND

2 BURN_GND

3 BURN_B1

4 BURN_B1

5 GSSB_GND

6 GSSV_VCC

7 GSSB_SCL

8 GSSB_SDA

6.3.4 P3 - GSSB Serial Connector

Molex Pico-Lock 504050-0891

The pins on P2 and P3 are connected

Pin Description

1 GSSB_SDA

2 GSSB_SCL

3 GSSV_VCC

4 GSSB_GND

5 BURN_B1

6 BURN_B1

7 BURN_GND

8 BURN_GND

6.3.5 P5 – Cross Burn Connector

Molex PicoBlade 053398-0471

Through a harness this is connected from DEPR-A to DEPR-B, so it works as a redundancy wire burn for the

release system.

Pin Description

1 GND

2 B1_OUT

3 BR1_IN

4 GND




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6.4 Connector Location of GSSB

6.4.1 J1 – Fine Sun Sensor


Pin Description

1 GSSB_VCC

2 GND

3 SDA

4 SCL

6.4.2 J2 – GSSB 2


The pins on connector J2 and J3 are directly connected, so the fit into the rest of the GomSpace GSSB using


Pin Description

1 GSSB_VCC

2 GSSB_SDA

3 GSSB_SCL

4 GND




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6.4.3 J3 – GSSB 3


The pins on connector J2 and J3 are directly connected, so the fit into the rest of the GomSpace GSSB using


Pin Description

1 GND

2 GSSB_SCL

3 GSSB_SDA

4 GSSB_VCC

6.4.4 P1 – GomSpace Debug

Samtec CLP-103-02-G-D-BE

This connector is used for internal programming of the PCB. For updating the firmware please contact

GomSpace.

7 Solar Cell Strings Below is shown an overview of how the different solar cell strings are connected on the 135° version.

All cells have a bypass diode in parallel. The strings can be accessed individually or put in parallel, either

direct or through blocking diodes. By shorting the blocking diodes, the P2C boards can also be used to make

the interconnections of the strings.

The 90° version works the same but with only four solar cells per string.




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8 Coarse Sun Sensor and Temperature Sensor On the main panel are mounted a coarse sun sensor and an external temperature sensor.

Green = Temperature sensor Red = Coarse sun sensor

The two sensors are connected to the GSSB A PCB, and their readings can be accessed through the GSSB.

9 Mounting Plate Next to the release mechanisms is a mounting plate, designed to have a GomSpace Fine Sun Sensor and a

small antenna. View the CAD below. The FSS is placed a 6° canted block to prevent the 135° deployed

panels to shadow the FSS. On the 90° usually no FSS are used since they should always be in the shade

when the solar cells are in the sun.

Above left are shown the mounting plate with the 6° canted block. On the right is shown an example with a

mounted antenna and a FSS.

9.1 Fine Sun Sensor on the 135o Version The NanoSense FSS is a vector sun-sensor with an I2C interface designed especially for CubeSats with high

ADCS requirements. They are connected to the a GSSB PCB.

Only one GSSB PCB is mounted and connected to a FSS. In the order do get the other FSS working, the

other GSSP PCB need to be mounted and connected.




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10 Release Mechanism By burning through a wire, a sled with a spring is released. A nut and bolt mounted on the sled release the

panels which fold out by the springs in the hinge. The hinges themselves ensure correct opening angle.




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11 Redundancy Release System The two DEPR PCBs are connected through a harness. Each burn PCB contains two burn resistors (R1 and

R2), each controlled from a different DEPR. View the illustration below.

Blue DEPR1 has access to the two R1’s and green DEPR2 has access to the two R2’s.

12 Absolute Maximum Ratings Stresses above those listed under Absolute Maximum Rating may cause permanent damage to the DSP.

Exposure to absolute maximum rating conditions for extended periods may affect the reliability.

Symbol Description Min. Max. Unit

Top-structure Operating Temperature on the panel mounted on

the satellite body

-40 +80 °C

Top-deployed Operating Temperature on the panels that are

deployed

-60 +100 °C

GSSB_VCC 3.1 3.5 V

BURN_B1 Connect to VBAT through switch on FPP* 3 14 V

* Burn resistors aligned to VBAT through option sheet




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13 Electrical Characteristics

Symbol Description Min. Typ. Max. Unit

Each power string (P2C-A/B/C)

• Voltage

• Current

• Power

• Efficiency

Full sunlight in LEO

Optimal voltage

Current at optimal voltage

Maximum power

13.38

490

6810

29.8

30

14.52

508

7200

30.2

V

mA

mW

%

GSSB_VCC

GSSB_I_idle

3.3

2.6

V

mA

BURN_B1 VBAT V

Course Sun Sensor

• Current

• Cosine error

Short circuit current at

1367 W/m2

930

1.85

3.5

μA o

Temperature Sensor External

• Range

• Resolution

-75

+175

3.5

oC

%

Temperature Sensor Internal

• Range

• Resolution

-40

-10

85

10

oC

%

14 Physical Characteristics Panels are made of AL6082 T6-51.

Description Value Unit

Mass - 90o 400 (approx.) g

Mass - 135o 449 g

Size View Mechanical drawings in the

next chapter

mm

15 Disclaimer The information in this document is subject to change without notice and should not be construed as a

commitment by GomSpace. GomSpace assumes no responsibility for any errors that may appear in this

document.

In no event shall GomSpace be liable for incidental or consequential damages arising from use of this

document or the software and hardware described in this document.




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16 Mechanical Drawing All dimensions in mm.

16.1 90 o




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16.2 90 o Main Panel




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16.3 135 o




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16.4 135 o Main Panel




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16.5 Stowed Drawings is shown with a 3U structure to illustrate how compact the DSP is stowed.

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