ABB ACS2000 AFE 1MVA User Manual page 52

CHAPTER 3 – CONTROL SYSTEM
3.2.2 AMC circuit board
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References
Overview
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The AMC circuit board is the major component of
3-4 AMC circuit-boards
location
the control system of the drive and performs gen-
eral drive, motor control, and closed loop func-
tions. The main internal control devices and the
peripheral input and output interfaces to the cus-
tomer communicate with the AMC circuit board via
optical fibers.
The circuit board is fitted with a Motorola DSP pro-
cessor and features two PPCS and eight DDCS
communication channels. The communication
channels are used for high speed data transfer via
the INT circuit boards to the Phase-INT circuit
boards inside the phase modules.
AFE and INU have their own AMC circuit board.
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3-4
1
3
AMC and main INTerface circuit board of the INU
1
2
AMC and main INTerface circuit board of the AFE
2
INTerface circuit board
3
AMC circuit board
4
Control tasks
Each AMC circuit board has specific control and
closed-loop tasks assigned to it.
• The AMC circuit board of the AFE handles all
rectifier and line-related functions of the drive.
• The AMC circuit board of the INU processes
drive and status information, performs the
speed and torque control tasks, and monitors
the operation of the drive.
The AMC circuit board continuously monitors all
relevant drive variables (eg, speed, torque, current,
voltage). Pre-programmed protection functions
ensure that these variables remain within certain
limits in order to maintain safe operation of the
drive. These internal functions are not programma-
ble by the user.
Optionally, the AMC circuit board can monitor sig-
nals from external equipment. These can be acti-
vated and adjusted with Parameters.
Other general control, protection and monitoring
tasks regarding the whole drive include control and
monitoring of:
• Main circuit breaker
• Grounding switch
• Door locking system
• Cooling system
These tasks are implemented in the AMC circuit
board of the INU.
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