Kongsberg KONGSBERG MARITIME PROPULSION SYSTEMS Active Front End (AFE)

Kongsberg Maritime water cooled frequency converters are specially designed

for marine installations, where there are special demands regarding ambient

conditions, and high power density.

Kongsberg Maritime water cooled frequency converters are based on the

“active front end” technology to avoid harmonic distortion and can transfer

power in both directions.

The drive can be used for induction, synchronous and permanent magnet AC

motors.

Kongsberg Maritime low voltage frequency converters

Benefits

• No need for phase shift transformers and will therefore save space,

weight and installation costs

• Low harmonic distortion

• 4 quadrant power flows with adjustable limits for motoring and genera

ting gives short ramp times in both directions

• Power factor correction or constant power factor

• User friendly with graphical HMI interface and alarm history recording

and data loggers

• S-ramps, programmable ramps and constant power ramps options

• Rpm, torque or power control of motor

• Fieldbus interface

• Motor control for induction motor, synchronous motor and permanent

magnet motor

• Redundant solution

• Open loop/closed loop easy change over

• Anti spin/adaptive power limit

• Easy commissioning, I/O testing and standardized parameter settings,

without advanced motor tuning

• Several load reductions/control input options

• Load control and load reduction integration to BPS

• Redundant system both on AFE and motoring possible to operate with

reduced output

• High number of ships sailing with Kongsberg Maritime AFE frequency

converters, since 1998

GENERAL TECHNICAL DATA

• Supply voltage: 380-500VAC or 525-690VAC

• Power range: 400 - 5700kW

• Ambient temperature: 0 (no frost) - 450C

• Cooling water: FW 5 - 370C

• Degree of protection:  IP22

• System pressure: 1.5 Bar