Lenze E82xVxxxKxxxxx - Manual (Page 460)

DC−bus operation
General information
12
l
460 EDS82EV903−3.0
12 DC−bus operation
12.1 General information
This chapter describes the dimensioning of DC−bus systems with frequency inverters of the
8200 vector and 9300 vector series as well as servo inverters of the 9300 series (including
all technology variants, "position controller, "register controller", "cam").
12.2 Functional description
The energy of controllers connected in a DC−bus system can be exchanged on DC−bus level.
Energy exchange in a DC−bus system
If one or more controllers operate in generator mode (braking operation), the energy will
be fed into the shared DC−voltage bus. The energy will then be available to the controllers
which operate in motor mode.
The energy for the drive system can be supplied from the three−phase system via
ƒ a 934X regenerative power supply module.
ƒ a 936X power supply module.
ƒ one or more controllers.
ƒ a combination of a 934X regenerative module or 936X power supply module and a
controller.
Advantages with the drive system
The number of braking units and power supply units may be reduced and the energy
consumption from the mains can also be reduced at the same time.
The number of mains supply points can be optimally adapted to the application.
12.3 Conditions for trouble−free DC−bus operation
(
Stop!
ƒ Only connect controllers with the same ranges for mains voltage or DC−bus
voltage (see tables below).
ƒ Adapt switching threshold of braking unit or brake transistor.
ƒ Operate all input modules only with the mains choke specified (
¶ 465)!
Mains filters can be used if their inductance corresponds to the inductance
of the specified mains choke.