I am working on a Cubesat subsystem which main task is to operate with stepper motor. We are not able to use two motors (redundant motors) or dual winding motor. We have selected single stepper motor for this task (high-reliability, space grade).
I am going to use DRV8899-Q1 to drive this step motor, but I need to have a backup driver for radundancy. My question is, can I add redundant DRV8899-Q1 and connect the outputs to the same windings? Redundant motor driver will be turned-off by default. In case of first driver failure, power supply to it will be cut off, and redundant one will be activated.
Do I need to separate outputs from each others? Or do I need to cut off also driver outputs? How to realise this? It's bipolar operation of the stepper motor. Should I use solid state relay configurated for AC operation, or load switch?
I will be grateful for any tips!
Best regards,
Slawek