Hi,
Thanks for answers. Under variator I think as variable gearbox, and VFD is inverter. I know that it seems unlogical to put them both, but the thing is that it is old machine in question which used and still uses variator and it is with relay logic, but there is now need to install PLC due to thing that it needs to be synchronized with other equipment. Now it is very inconvenient to change motor. There are variators with servo driven shaft, but there is no space for that. I just need to know can I do some harm to motor with inverter. For me it seems that there are few potential problems like that that current is changed along with gearbox ratio so there is no real protection of motor, and there is question of motor ventilation.
Any thoughts?