Resistor sizing for regnerative loads?
Resistor sizing for regnerative loads?
(OP)
I hope someone can help with this. It has been driving everyone in the office MAD.
We are involved in a project with large printing presses. The press manufacturer has told us AC drives with regenerative braking is used. Since we have generator back up, we cannot allow this regenerative load back onto the system (as is often the case)since we must avoid tripping on either overspeed or reverse power (we cannot guarantee that other loads in the building will be sufficient to absorb the regen. power). Therefore bleed resistors (dump banks)must be installed to absorb the regen. power. But how do you size these resistors?
Can anyone help? I hope the answers not too simple because its baffled many proffessionals here.
I would very much like to know and understand the maths behind this problem
Thanks for any help
We are involved in a project with large printing presses. The press manufacturer has told us AC drives with regenerative braking is used. Since we have generator back up, we cannot allow this regenerative load back onto the system (as is often the case)since we must avoid tripping on either overspeed or reverse power (we cannot guarantee that other loads in the building will be sufficient to absorb the regen. power). Therefore bleed resistors (dump banks)must be installed to absorb the regen. power. But how do you size these resistors?
Can anyone help? I hope the answers not too simple because its baffled many proffessionals here.
I would very much like to know and understand the maths behind this problem
Thanks for any help






RE: Resistor sizing for regnerative loads?
RE: Resistor sizing for regnerative loads?
Thanks for your thoughts - I have no knoweldge of the drive since this is being specified and installed by the press manufacturer. I didn't realise that the regen could be big ('forward' power of the press is in the order of 10mW). Also do you know (mathematically) how you size the resistors?
Thanks
RE: Resistor sizing for regnerative loads?
RE: Resistor sizing for regnerative loads?
RE: Resistor sizing for regnerative loads?
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