394 Rockwell Automation Publication 2198-UM002G-EN-P - February 2019
Appendix C Size Multi-axis Shared-bus Configurations
Select Drive/Motor Combinations
The motor required for a particular application determines the servo drive
required for full motor performance.
For best results, use the Motion Analyzer system sizing and selection tool,
available at https://motionanalyzer.rockwellautomation.com.
Drive/motor
performance specifications and torque/speed curves are also available in the
Kinetix 5700 Drive Systems Design Guide, publication KNX-RM010
.
Select the Power Supply and Define the DC-bus Groups
• Determine the converter DC-bus motoring and bus-regulation power
requirements based on the load profile.
• Estimate the net converter and inverter power and bus-regulator
capacity, based on the load profiles.
• Determine if 2198-CAPMOD-2240 capacitor modules are required.
• Determine if 2198-DCBUSCOND-RP312 DC-bus conditioner
modules are required.
For best results, use the Motion Analyzer system sizing and selection tool,
available at https://motionanalyzer.rockwellautomation.com.
Calculate System and External-bus Capacitance
Total system capacitance is the sum of all internal capacitance values from each
of the drive modules (single-axis inverters, dual-axis inverters, power supplies,
and capacitor modules) in the same DC-bus group.
The total system capacitance must be less than the maximum supported
DC-bus capacitance value of the power supply.
External bus capacitance is the total system capacitance minus the power
supply capacitance. The external bus capacitance must be entered into the
Logix Designer application for a regenerative power supply to maintain proper
control.
IMPORTANT If your total system capacitance value exceeds the maximum supported
capacitance value of the DC-bus power supply, perform one of the following:
• Increase the size of the 2198-Pxxx DC-bus power supply or 2198-RPxxx
regenerative bus supply
• Use multiple DC-bus power supplies (1…3 power supplies are possible)
Decrease the total system capacitance by removing inverters or capacitor
modules from the DC-bus group.
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