text: <s>[INST] PowerFlex40 Regenerative Load Summary: What (if any) is the regenerative load passed to the incoming AC LineMy application is powered using a generator. The end user is concerned that the drive will pass the regenerative load back to the generator causing problems with the generator's voltage regulator. The equipment is Powerflex40 with line reactor and external dynamic brake. (There are three motors which are all set up the same (motors are 1.5 HP (2) and 1.0 HP (1)). What is the regenerative load that could be passed back to the generator and (if present) how can it be limited? [/INST] The front end of the PF40 drive is diode so there is no way to get the regen back onto the line. The bigger problem with running a drive on a generator is the non-linear load. The drive does not draw current from the source through the entire sinewave of the incoming voltage. This causes voltage and current distortion. Basically it comes down to the generator needs to be oversized for the load. What is the load that it will have regen? This drive will handle some regen, but it is not the best drive for a lot of regen. It can have problems with bus regulation. \\n </s>