DC-bus operation
Introduction
Terminology and abbreviations used
8
310
EDS94SPP101 EN 7.1
8.1 Introduction
8.1.1 Terminology and abbreviations used
ƒ DC bus
Theenergystoreinthecontrollerorsupplymodulefromwhichthecontroller
modulates the AC voltage for the motor. The DC buses of several controllers can be
networked.
ƒ DC bus
Electrical connection of the DC connections of several controllers via cable or busbar.
ƒ DC-voltage level
DC-voltage level in the DC bus
ƒ Power supply module
Module with AC mains connection used to supply the DC bus of a drive system with DC
voltage.
ƒ Regenerative power supply module
Power supply module with additional power regeneration into the AC mains
ƒ Multi-axis controllers (Multi Drive)
Controllers for connection to a DC bus. Multi-axis controllers have no AC mains
connection and no brake chopper.
ƒ Single-axis controllers (Single Drive)
Controllers for connection to an AC mains or a DC bus. Single-axis controllers have an
integrated brake chopper.
ƒ Brake chopper
Switching element in the controller used to dissipate excess energy in the DC bus via
a brake resistor.
ƒ Brake resistor
High-performance resistor used to convert excess energy in the DC-bus into heat.
ƒ Braking operation
Motor operation in generator mode with energy feedback from the motor to the
controller.
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