I've got a question, maybe an issue, but more just curiosity.
I have an air compressor, 100HP, that runs with VFD contorls. It is the only one in the loop so I don't have any worries about a second VFD driven air compressor causing issues.
When the factory is in low air usage, the VFD is at a stable output frequency. When the air demand goes high, the VFD is also stable. But when the air usage is somewhere in the middle, the VFD tends to make frequent frequency changes. It changes rapidly from 30 to 60 Hz output. I'm thinking that some parameter in the controller's PID is not tuned right, but don't know enough about it to attempt to tune it myself. The service technicians did not think it was a concern.
My curiosity is whether or not these rapid frequency changes will wear out the components any faster? We recently had the bearings fail in the motor and had to repair them. I don't have any CFM numbers or anything like that, and no way currently to measure them.
I have an air compressor, 100HP, that runs with VFD contorls. It is the only one in the loop so I don't have any worries about a second VFD driven air compressor causing issues.
When the factory is in low air usage, the VFD is at a stable output frequency. When the air demand goes high, the VFD is also stable. But when the air usage is somewhere in the middle, the VFD tends to make frequent frequency changes. It changes rapidly from 30 to 60 Hz output. I'm thinking that some parameter in the controller's PID is not tuned right, but don't know enough about it to attempt to tune it myself. The service technicians did not think it was a concern.
My curiosity is whether or not these rapid frequency changes will wear out the components any faster? We recently had the bearings fail in the motor and had to repair them. I don't have any CFM numbers or anything like that, and no way currently to measure them.