Reuse of generated current
If I have two Solo’s wired in parallel, when one of the motors is generating and the other is driving, will the generated current be consumed by the driving motor or will it be lost somewhere? The power supply is protected by a diode.
This is a very good while tricky question, in theory, the answer is Yes, but there are many points to consider:
- First of all, SOLO operates in Four-quadrant mode, with regeneration, so during deceleration, if the speed of the motor descends fast enough, the motor will return back Power to the supply and can be used to recharge the batteries if connected.
- This returned energy can be totally used by the other motor if both motors are connected to the same supply, however, the motor that is using this energy should be actually up and running and it might not be able to use all the energy
- The exceeding returned energy ( current) can cause the BUS voltage to rise and in extreme cases, it can be dangerous
To mitigate the rise of the BUS voltage and also to save the energy of the Motors independent from their state of consumption (motoring or regenerating) you can use multiple big capacitors with a high voltage rating ( 2X more than your max BUS or Supply voltage) in parallel to your Battery on the Supply inputs of each module, for instance, capacitors like:
These capacitors will be installed in parallel on the input of the supply(as you know their final capacitance will be the sum of all), so in this condition, any returned energy can be stored in these CAPs and can be used later.
I hope this could be helpful. let me know if you need anything else.
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