Introduction to the manual
24
Four-quadrant
operation
Operation of a machine as a motor or generator in quadrants I, II, III and
IV as shown below. Also used as an attribute of a drive; a regenerative
drive can operate the electric machine in all four quadrants, a non-
regenerative only in two. In quadrants I and III, the machine operates as a
motor, whereas in quadrants II and IV it operates as a generator
(regenerative braking).
Frame (size) Refers to power modules that share a similar mechanical construction, for
example:
• inverter modules of frame R8i
• frame 2×R8i + 2×R8i includes two size R8i supply modules and two R8i
inverter modules.
To determine the frame size of a component, refer to section Type
equivalence table on page 147..
IGBT Insulated gate bipolar transistor
IGBT supply module Bidirectional IGBT bridge and related components enclosed inside a metal
enclosure. Used as the supply module in regenerative and low-harmonic
drives.
IGBT supply unit (ISU) IGBT supply modules under control of one control board, and related
components. See IGBT supply module.
Inverter Converts direct current and voltage to alternating current and voltage.
Inverter module Inverter bridge, related components and drive DC link capacitors enclosed
inside a metal enclosure.
Inverter unit (INU) Inverter module(s) under control of one control board, and related
components. One inverter unit typically controls one motor. See Inverter
module.
LCL filter Inductor-capacitor-inductor filter for attenuating harmonics
PPCS Power plate communication system; a protocol used in the optical fiber
link that controls the output semiconductors of a power module.
RAPI Auxiliary power interface board.
RDCU Drive control unit. The RDCU is a separate unit consisting of an RMIO
board built in a plastic housing.
RFI filter Radio-Frequency Interference filter.
Term/Abbreviation Explanation
To Next Page
Loading...
