PowerDrive - EPS for CubeSats
PowerDrive is an Electrical Power System (EPS) designed for use in 2U to 16 U cubesats. PowerDrive integrates the solar power conditioning and power distribution into a compact PC104 compliant aluminium enclosure, complete with proprietary Ta-based radiation shielding tape.
There are 3 independent MPPT enabled channels for solar power collection that support 4 solar panel inputs. There are 6 independent DC-DC converters which can be configured for different output levels, depending on the bus and payload requirements. There are 10 output connectors for sub-system power and 6 outputs for deployment systems in addition to the PC104 header.
A low power STM32 microcontroller controls the system inputs, outputs, batteries, and provides telemetry through isolated CAN and RS485 interfaces. The built-in hardware watchdog ensures reliability during long-duration missions.
PowerDrive can be connected to up to 6 PowerDrive-50 battery packs, for a total energy storage capacity of over 300 Wh.
Technical Specs
Solar Panels:
- 3 independent MPPT Input Channels
- Input Voltage Range: 6 - 35 V
- Peak Input Current (per channel): 3 A
- Peak Input Power (per channel): 60 W
Power Distribution:
- 3 x 5 V buck converters (configurable 3.3 to 12 V)
- 2 x 12 V buck converters (configurable 3.3 to 12 V)
- 1 x 12 V buck-boost (configurable 3.3 to 24 V)
- 2 x V_raw voltage (PC104)
System:
- Power Consumption: 1.5 W (nominal)
- Processor: Single core 32-bit Arm Cortex-M33 MCU
- Interfaces: CAN, RS-485
- Dimensions: 95.5 x 90.5 x 31.8 mm
- Weight: 300g
- Operating Temperature: -40°C to 85°C
Salient Features
- Programmed power states based on Battery SoC
- Battery health monitoring via I2C
- Optional eFuse for output channel protection
- Watchdog Timer for MCU power reset
Data Sheet
Click on the link to access the data sheet:
https://drive.google.com/file/d/1Zt9-ljycAnLKSRw8o7qOJHZh-2yy179Y/view?usp=sharing
