380V 40A motor needs to come to dead stop. The stop time is not all that important, so there is some leeway here. I am going to use 3 semikron skkd rectifier units to convert the 3phase to DC to inject. Just need some design help. How much current and voltage will I need to inject? any other considerations I should be taking? Do I need capacitor blocks as well or can I do this without any resonance? from my understanding the capacitor bank make this even harder to calibrate?
Just rectifying the line voltage will give you way too much voltage. The load seen by the DC supply is essentially just the DC resistance of the windings. PS1 Why do you need to design this? Why not just buy a commercially available DC braking package? PS2 This manual gives an indication of what is involved, but this braking unit appears to provide better performance than a simple fixed-current system. downloads.eatoncanada.ca/download.
