Bosch 4306 Service Manual download pdf (Page 6)

• DOK-POWER*-KDV*2.3****-ANW1-EN-E1,44 • 06.97

1. The design of INDRAMAT's modular AC drive system

1.1. The design of the KDV 2.3 supply module

The threephase bridge rectifies the threephase mains AC voltage and provides

the DC high voltage for the drives.

When the drives are in generator-mode, the regenerated energy is absorbed

by the bleeder and transformed into heat.

The buffer capacitance provides sufficient smoothing.

The KDV 2.3 provides the +24V and ±15V for all attached drive modules.

In the event of a power failure, the signal voltages receive their power from the

DC bus. This means that the drive electronics can still function, when the

drives are in generator mode.

The KDV 2.3 is equipped with extensive monitoring functions. These

communicate with the drive modules via the signal voltage bus.

The Bb1 contact is of greater significance to drive system readiness. Power

can only be switched on when this contact is closed.

Power supply to the

drives

Power supply to the

electronics

Monitoring the drive

system

Supply and drive

monitoring

drives ready

supply ready

Bb1

230 V AC

3 x 230 V

smoothing choke

300 V DC

to supply the

drives

FSKDV23

Figure 1.2: The design of the KDV 2.3 supply module

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Bosch 4306 Service Manual Page 6