Shared Bus - Multiple Supply, Multiple Internal Bleeders, Floating Bus

Consider a typical 3-axis gantry robot application in a shared bus configuration with the following:

    Capacitor Module
 
    X Axis Line rectifier power module with an uncontrolled bus
Inverter module
Internal bleeder module
Shares the bus power for all axes
 
    Y Axis Line rectifier power module with an uncontrolled bus
Inverter module
Internal bleeder module
Shares the bus power for all axes
 
    Z Axis Line rectifier power module with an uncontrolled bus
Inverter module
Internal bleeder module
Shares the bus power for all axes

  System supply power

The total power the servo system draws or regenerates to the supply connection
    > 0 is supply
    < 0 is regenerative
 

  Bus supply power

The supply power to the bus from the infeed section of a drive
    > 0 is supply
    < 0 is regenerative

When there is more than one infeed, the user has the option to specify if the total infeed power is:

  1. Divided equally among all infeeds
  2. Divided proportionally to each infeed’s continuous power rating

  Bleeder power

The bleeder power distributed to each enabled bleeder on the bus

When there is more than one bleeder, the user has the option to specify if the total bleeder power is:

  1. Divided equally among all bleeders
  2. Divided proportionally to each bleeder’s continuous power rating

 

  Bus stored energy

The stored bus energy at any point in time in the cycle
 

  Bleeder energy

The total energy dissipated by all bleeders in the system.  Shown to illustrate the amount of energy dissipated relative to the total energy capacity of the bus.
 

  Inverter power

The inverter power to and from the motor
    > 0 is motoring
    < 0 is generating