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Electrical Power System EPS

Electrical Power System EPS

NanoAvionics First and Second Generation Electrical Power Systems (EPS 1.0 and EPS 2.0) are designed to meet the newest nano and microsatellite market demand, requiring high power in a small size.

The EPS is a subsystem that manages the power collection and distribution in the satellite with an integrated Battery Management System (BMS). All subsystem and payload power supply are controlled via the EPS and all of the output channels can be switched on and off autonomously or by ground command. The EPS stores generated energy in onboard Lithium-Ion batteries. To ensure a safe battery working environment the EPS is integrated with battery heaters and battery balancing functions.

Modular architecture allows to scale EPS 2.0 to any project requirements without stretching specs or flying with excess hardware. This is achieved by separating EPS 2.0 into four main blocks: PCU, PMU, PDU, and PSU. Depending on project and mission requirements, a combination of these boards can be adjusted, so the most efficient solution can be achieved.

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NanoAvionics First and Second Generation Electrical Power Systems (EPS 1.0 and EPS 2.0) are designed to meet the newest nano and microsatellite market demand, requiring high power in a small size.

The EPS is a subsystem that manages the power collection and distribution in the satellite with an integrated Battery Management System (BMS). All subsystem and payload power supply are controlled via the EPS and all of the output channels can be switched on and off autonomously or by ground command. The EPS stores generated energy in onboard Lithium-Ion batteries. To ensure a safe battery working environment the EPS is integrated with battery heaters and battery balancing functions.

Modular architecture allows to scale EPS 2.0 to any project requirements without stretching specs or flying with excess hardware. This is achieved by separating EPS 2.0 into four main blocks: PCU, PMU, PDU, and PSU. Depending on project and mission requirements, a combination of these boards can be adjusted, so the most efficient solution can be achieved.

  • Electrical Power System 1.0

    Highlight Features:

    • Wide range solar panel input voltages (2.6 – 15 V)
    • Four MPPT converters with 8 solar panel input channels
    • Four output converters with 18 output channels
    • High output power (up to 175 W)
    • Integrated ideal diodes
    • On-board Lithium-Ion battery pack
    • Integrated battery balancing
    • On-board battery heaters
    • Overcurrent protection, battery undervoltage and overvoltage safety features
    • External battery pack provides up to 161 Wh battery capacity
    • Current, voltage, and temperature logging
    • Software configurable output channel overcurrent protection
    • Implemented EPS watchdog system
    • Supports CAN communication interface with CSP protocol
    • EPS configuration through USB interface
    • ISS Kill Switch option
    • Always-ON Real Time Clock
    • Thermal vacuum tested
    • PC/104 standard
    • IPC-A-610 Class 3 assembly

    Main Specifications:

    • MPPT converter efficiency: up to 96 %
    • Output converter efficiency: up to 96 %
    • Four regulated voltage rails: 3.3 V; 5 V; Configurable 3 – 12 V.
    • Unregulated voltage rail: 6.0 – 8.4 V.

    Outputs:

    • Up to 18 output channels (configurable voltage rail)
    • Typical output channel current: 3.13 A (configurable)
    • Max 3.3 V Output converter power: 20 W
    • Max 5 V Output converter power: 20 W
    • Max 3-18 V Output converter power: 20 W
    • Max unregulated output power with on-board battery back (2S1P configuration): 25 W
    • Max unregulated output power with external battery pack (2S7P configuration): 175 W

    Inputs:

    • Four MPPT converters (8 solar panel input channels) with integrated ideal blocking diodes
    • Solar panel voltage range: 2.6 – 15 V
    • Max input power per MPPT converter: 25 W
    • Max charging power with on-board battery back (2S1P configuration): 10 W
    • Max charging power with extended battery pack (2S7P configuration): 70 W

    Configuration Options:

    Power Supply System EPS 2S1P Configuration
    Max Unregulated Output Power 25 W
    Max Charging Power 10 W”

    Power Supply System EPS 2S2P Configuration
    Max Unregulated Output Power 50 W
    Max Charging Power 20 W”

    Power Supply System EPS 2S3P Configuration
    Max Unregulated Output Power 75 W
    Max Charging Power 30 W”

    Power Supply System EPS 2S4P Configuration
    Max Unregulated Output Power 100 W
    Max Charging Power 40 W”

    Power Supply System EPS 2S5P Configuration
    Max Unregulated Output Power 125 W
    Max Charging Power 50 W”

    Power Supply System EPS 2S6P Configuration
    Max Unregulated Output Power 150 W
    Max Charging Power 60 W”

    Power Supply System EPS 2S7P Configuration
    Max Unregulated Output Power 175 W
    Max Charging Power 70 W”

  • Electrical Power System 2.0

    Highlight Features:

    • Wide range solar panel input voltages (5 – 42 V)
    • Four MPPT converters with 12 solar panel input channels per input board
    • 20 output channels per output board
    • Four step-Down and two Step-Down/Step-Up converters per board
    • High output power (up to 600 W)
    • Integrated ideal diodes
    • On-board Lithium-Ion battery pack
    • Integrated battery balancing
    • On-board battery heaters
    • Battery overcurrent protection, battery undervoltage, and overvoltage safety features
    • External battery pack can provide up to 852 Wh battery capacity
    • Current, voltage, temperature, output fault, and state telemetry logging
    • Software configurable output channel overcurrent protection
    • Implemented EPS watchdog system
    • Supports CAN communication interface with CSP protocol
    • EPS configuration through USB interface
    • Always-ON Real Time Clock
    • Thermal vacuum tested
    • PC/104 standard
    • IPC-A-610 Class 3 assembly

    Main Specifications:

    • MPPT converter efficiency: up to 97 %
    • Output converter efficiency: up to 97 %
    • Six adjustable regulated voltage rails: 3.3 V; 5 V; 12 V; 28 V
    • Unregulated voltage rail:
      • 4S Configuration: 12 – 16.6 V
      • 8S Configuration: 24 – 33.2 V

    Outputs:

    • 20 output channels in default, up to 80 output channels in the extended output version (configurable voltage rail)
    • Each output can be assigned as Always-On
    • Max 3.3 V Output converter power: 33 W
    • Max 5 V Output converter power: 40 W
    • Max 12 V Output converter power: 60 W
    • Max 28 V Output converter power: 75 W
    • Max unregulated output power with on-board battery pack:
      • 4S2P battery pack configuration: 50 W
      • 4S12P battery pack configuration: 240 W
      • 8S1P battery pack configuration: 100 W
      • 8S12P battery pack configuration: 600 W

    Inputs:

    • Four MPPT converters (12 solar panel input channels) with integrated ideal blocking diodes
    • Solar panel voltage range: 5 – 42 V
    • Max input power per MPPT converter: 50 W
    • Max charging power:
      • 4S2P battery pack configuration: 40 W
      • 4S12P battery pack configuration: 240 W
      • 8S1P battery pack configuration: 40 W
      • 8S12P battery pack configuration: 480 W
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