Rockwell Automation Publication 2198-UM001D-EN-P - May 2014
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Sizing Multi-axis Shared-bus Configurations
Appendix C
Shared AC/DC Hybrid Example
If the required motoring power exceeds the available converter power sourced by
the shared DC configuration, then connect a second converter drive to make a
shared AC/DC hybrid configuration. This increases the available converter
power.
In this example, the same four 2198-H040-ERS drives are used, however, two are
connected as parallel converter (leader) drives and the other two as common-bus
(follower) drives. The total converter power is derated by 30%.
Figure 104 - Shared AC/DC Hybrid Configuration
The available converter power to the system is (8.4 • 2) • 0.7 = 11.76 kW. In this
example, total motoring load must not exceed 11.76 kW. The available converter
power was increased by 40% over the same drives in shared DC configuration.
Bonded Cabinet
Ground
Three-phase
Input Power
24V Input
Control Power
2198-H040-ERS
Common-bus (converter)
Leader Drives
2198-H040-ERS
Common-bus (inverter)
Follower Drives
DC Bus Connections
