1 Introduction
A drive system requires energy for acceleration or constant movement
that must be supplied to the system.
During deceleration, a motor acts as a generator. A considerable por-
tion of the kinetic energy is re-generated as electrical energy.
Since electrical energy can only be stored to a limited extent in a sin-
gle drive, a drive uses a braking resistor to transform the excess
energy into thermal energy.
Use of electrical energy If an application operates with multiple drive systems, it may be useful
to employ a common DC bus. By sharing a common DC bus, the
energy regenerated by one drive can be supplied to another drive.
Common DC bus Whether or not a common DC bus makes sense depends on the
acceleration and deceleration cycles of the drive systems.
A common DC bus is useful, for example, if one drive systems accel-
erates while another drive system decelerates.
If the drive systems accelerate and decelerate at the same time, a
common DC bus does not make sense.
LXM32
1 Introduction
Common DC bus 13
MNA01M001EN, V1.01, 08.2014