14 Rockwell Automation Publication MOTION-AT007A-EN-P - May 2020
Chapter 1 DC-bus Wiring Guidelines
Kinetix 7000 Servo Drives
For 2099-BM06-S, 2099-BM07-S, and 2099-BM08-S servo drives, the precharge hardware is located on the power circuit board. It is
composed of a resistor in series with the positive DC-bus between the DC link and the bus capacitors. The resistor has a relay contact
connected in parallel that closes when the bus precharge level has been reached, bypassing the precharge resistor. The precharge function
operates the same way for AC and DC power.
Figure 9 - AC and DC Input Schematic for Kinetix 7000 (2099-BM06-S…2099-BM08-S) Servo Drives
For 2099-BM09-S, 2099-BM10-S, 2099-BM11-S, and 2099-BM12-S servo drives, the precharge capability must be provided at the system level.
Disconnect switches must not be used between the input of the drive and a common DC-bus without the use of an external precharge
device. The precharge hardware is implemented with an SCR rectifier such that the SCRs are phase advanced to limit the inrush current into
the bus capacitors. This phase-advanced precharge is not controlled by the drive and must normally be completed by the minimum
precharge time required by the drive. The drive does not complete precharge until the bus voltage is stable and above the undervoltage level.
Figure 10 - AC Input Schematic for Kinetix 7000 (2099-BM09-S…2099-BM12-S) Servo Drives
To Next Page
Loading...
Need help?
General
