Rockwell Automation 2090-UCSR-A300 300 W Active Shunt Regulator - Manual (Page 2)

Publication 2090-IN002C-EN-P — June 2007
2 300 W Active Shunt Regulator
Performance The peak shunting capability is a direct result of using a 36 Ω shunt resistor.
The peak shunt power can be calculated by dividing bus voltage squared, by
36. For example, if the bus voltage is 380V when the shunt is energized, the
shunt power is 4,011 W.
Continuous Shunt Capability
A shunt regeneration profile is defined by shunt time, cycle time, and peak
power level. Figure 2 illustrates a profile of regeneration during a machine
cycle.
• Shunt power is the peak shunt power during the shunt time.
• Shunt time is the time the power pulse is dissipated by the shunt.
• Cycle time is the time from the beginning of one shunt time to the
beginning of the next shunt time.
Figure 2
Shunt Regeneration Profile
380V
36 Ω
4011 W
2
Shunt Power
(watts)
Area = Shunt Energy (joules)
Shunt Time
(seconds)
Cycle Time or
Machine Cycle