Rockwell Automation SA3100 Distributed Power System Drv Config,Program - Manual (Page 144)

G-2 SA3100 Drive Configuration and Programming
Maximum RMS Current = Square Root of [(%Torque_Overload_Ratio/100)
2
x
(Rated_Motor_Current
2
- Iz
2
) + Iz
2
]
Iz is the magnetizing current component of the Power Module output stored in local
tunable variable STATOR_IZ_E1%. The value for this variable can be generated by
enabling tuning in register 100/1100, bit 1. Note that you must load a complete
parameter object file and UDC task to the UDC module before you can enable tuning.
If the calculation of the Maximum RMS Current is less than or equal to the Power
Module Rated Amps at the selected carrier frequency, the programmer may continue
entering the application data.
If the calculated Maximum RMS Current exceeds the Power Module Rated Amps,
refer to the actual motor data sheets to determine the actual current required by the
motor for the required Torque Overload Ratio. If the required current exceeds the
Maximum Power Module Current Rating, a higher rated Power Module must be used.