Tuesday, December 29, 2015

Advanced Cell Bypass for Variable Frequency Drives (VFDs)

Advanced cell bypass is patented technology at the Siemens Robicon drive. It allows the drive to continue operating in the unlikely event at the cell fault.

This feature is available on all Siemens Robicon drives. The unique perfect harmony topology makes it all possible.

When a drive is equipped with this feature a contact is present on the output if each other power cells. In the event of a fault the contact closes and isolates the output to the power cell.

With multiple power cells connected in series, the loss of one power cell leaves the remaining cells active, which allows the VFD to continue operating at a voltage a at least 80 percent, or up to 92 percent speed on a centrifugal load. This serial cell configuration is central to the bypass feature.

Watch the video below to learn more abut this technology.