ABB ACS880 - 4 Operating Principle and I;O Control; Contents of this Chapter; Overview of SPRS Control Program

Operating principle and I/O control 15
4
Operating principle and I/O
control
Contents of this chapter
This chapter provides the system overview and operating principle of the ACS880
IGBT based slip power recovery system.
Overview of SPRS control program
SPRS (Slip power recovery system) is an external system connected to the rotor
circuit for controlling speed and torque. The system also recovers power from the
rotor and feeds it back to the power system, avoiding wastage of energy.
This system is suitable for any new installation as well as retrofits. It offers optimum
solution for speed adjustable applications with limited speed range. The power range
is 500 to 5000 kW. See the SPRS connection diagram on page 17 to understand the
operating principle of the complete system.
The IGBT based SPRS application is designed by programming the motor and I/O
control (ZCU) board of ACS880 drive using an application software. The software is
customized using the Codesys tool for:
• integrating I/O control extension
• configuring application parameters and signals
• establishing communication between the control boards.
Other SPRS specific parameters can be programmed at the time of commissioning
using the Drive composer PC tool or the ACS-AP-I control panel. You can easily
program the SPRS parameters using the logical groups of ACS880 drive parameters.
See section Parameters on page 33.