TOP - Avionics - Spacecraft Electrical Power Systems
Broad Reach Engineering Advanced EPS Systems are based on 3U boards designed specifically for spacecraft & payload applications. Design options include single string and redundant systems. EPS systems are designed to meet rigorous spacecraft environments. Systems are available to interface solar arrays and batteries to spacecraft loads. Control is provided via FPGA based autonomous functions and command via an external controller (C&DH). Telemetry is reported autonomously to the host at rates from 5Hz to 100Hz.

In a standalone or as part of an integrated avionics package, the SACI and LASI board provide a complete spacecraft power distribution system solution. The SACI Board provides a solar array and battery interface complete with battery charge control and telemetry feedback capability. The LASI and McLASI boards are general purpose switching cards which are controlled via the SACI. Multiple LASI/McLASI boards may be combined to increase the system capabilities.

The SACI, McLASI, and LASI are designed to be compatible with a 3U form factor and provide interfaces for a 3U cPCI backplane. In such a setup, the SACI and LASI may be used as part of an Integrated Avionics Unit - combining C&DH and EPS functions in one compact assembly.
 

SACI Features

  • Charge Control & Solar Array Interface Card
  • 14 Solar Array String Inputs @ 6.9A (derated)
  • 12/14 Array Strings Switched
  • Software Battery Charging with Hardware Backup
  • Autonomous Charging of Completely Dead Battery
  • Switch Command & Telemetry Interface
  • Controls up to 3 LASI Cards
  • Solar Array / Battery / Load Current Telemetry
  • Battery Voltage Telemetry
  • 8 PRT Sensor Interfaces
  • 3 Low Voltage Switched Outputs @ 5V, +/-15V
  • 20A Total Throughput Current
  • RS-422 Interface
  • Dimensions: 4.4" x 8.6" x 1.4"
  • Mass: < 0.32kg
   

LASI Features

  • 5 Arm/On/Off Outputs @ 6.9A each (derated)
  • 10 On/Off Outputs @ 6.9A each (derated)
  • 2 Arm/On/Off Outputs @ 1.2A each (derated)
  • 6 On/Off Outputs @ 1.2A each (derated)
  • 15A Throughput Current
  • Bus Voltage Telemetry
  • Total Card Current Telemetry
  • Switch Status Telemetry
  • Dimensions: 3U Form Factor
  • Mass: < 0.22kg
   

McLASI/McLASI2 Features

  • 4 On/Off Outputs @ 15A each (derated)
  • 3 Torque Rod Power Outputs (H-Bridge)
  • Valve and/or Motor Driver Circuitry
  • 20A Throughput Current
  • Bus Voltage Telemetry
  • Total Card Current Telemetry
  • Switch Status Telemetry
  • Dimensions: 3U Form Factor
  • Mass: < 0.20kg