Terms And Abbreviations - ABB ACS800 Hardware Manual

Terms and abbreviations

Term/
Abbreviation
CMF
DDCS
Drive unit
DSU
DTC
EMC
Frame (size)
IGBT
Inverter unit
I/O
NDBU or
ADBU
NGPS or
AGPS
NPBU or
APBU
PLC
PPCS
RDCU
RFI
RMIO
THD
Explanation
Common mode filtering.
Distributed Drives Communication System; a protocol used in optical fibre
communication inside and between ABB drives.
See Inverter unit.
Diode supply unit (consisting of one or more diode supply modules).
Direct Torque Control.
Electromagnetic Compatibility.
Relates to the construction type of the component in question. For example,
several supply modules with different nominal powers may have the same basic
construction. The term is often used in reference to a group of components that
share a similar mechanical construction.
To determine the frame size of a component, refer to the rating tables in chapter
Technical data.
Insulated Gate Bipolar Transistor; a voltage-controlled semiconductor type widely
used in inverters due to their easy controllability and high switching frequency.
An entity containing all inverter modules controlling a motor, together with their
control electronics, and I/O and auxiliary components.
Input/Output.
Types of optical branching unit for fibre links that use the DDCS protocol.
Gate driver Power Supply board. An optional board within inverter modules used to
implement the Prevention of Unexpected Start function.
Types of optical branching unit used for connecting parallel-connected inverter
modules to the RDCU.
Programmable Logic Controller.
Power Plate Communication System; a protocol used in the optical fibre link that
controls the output semiconductors of an inverter module.
Drive control unit. The RDCU is a separate unit consisting of an RMIO board built
in a plastic housing. Module sizes R2i to R5i have the RMIO board built-in.
Radio-Frequency Interference.
Motor control and I/O board. Contains the principal inputs and outputs of the drive.
Module sizes R2i to R5i have the RMIO board built-in; with larger units, the RMIO
is contained within a separate RDCU drive control unit.
Total Harmonic Distortion
Introduction to this manual
13