ELEKTRA is a fully integrated two axis drive electronics unit developed by KONGSBERG to command the angular speed and position based on commands from the Spacecraft.
ELEKTRA can control up to two mechanisms simultaneously and independently. Motion can be commanded by a specific number of steps or as constant speed. Powered Hold-mode is also supported. Power, position, speed, acceleration and step-mode (micro-step, full-step) are configurable via tele commands in all modes.

The first generation of ELEKTRA was delivered in the Sentinel 1 program, and has been functioning nominally in-orbit since 2014.

Features

• Constant power control
• Full Cold Redundancy
• Full protection against over-voltage, under-voltage and short circuit
• Configurable Power/Speed/Acceleration
• Full step to 128 micro-step
• High-resolution speed command
• High-resolution position readout
• Mechanical end stop switch acquisition
• Programmable acceleration
• Low EMC emissions
• FDIR/Housekeeping