For an internship project I must program a motor that will be used on a bike for rehabilitation purposes:

Components (see scheme p.2):

• Resistor TE TJT500 3R3 J 2040 (TE connectivity)
  • 500 W
• Power supply: TSP 600-148 (Traco power).
  • 48 VDC
  • 600W
  • 12.5A (Imax)
• ODrive board: Odrive v3.6, 56V
  • Firmware version : 0.5.5.
  • A power supply (12V-56V for the 56V board variant). A battery is also fine.
• Motor TSDZ2
  • 500 W
• Relays
• RaspberryPi 4 Model B
  
  
  I would like to ensure that no negative current will flow back to the power supply, can I put a diode or a MOSFET, if yes, how to choose it and how will the electrical power will be dissipated ?
  I worked great with the power supply but when I tried with a battery, the resistance exploded at the moment when I switched it on, have you an idea why ?
  
  Any help appreciated,
  Thank you !

 

What is the purpose of the resistor?
Is its resistance 3.3 ohms?

Your posted diagram is too blurry to see any pertinent details.

 

What is the purpose of the resistor?

It is a braking resistor controlled by the ODrive board, it is supposed to dissipate energy when the motor generates some current.

Is its resistance 3.3 ohms?

Yes, sorry I have forgotten to precise it.

Your posted diagram is too blurry to see any pertinent details.

Is it better ?