KEB COMBIVERT F6 Instructions For Use Manual - 2 Product Description
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PrODUcT DeScrIPTION
2 Product Description
The COMBIVERT F5 / F6 is a four quadrant drive converter.It consists of two inverters,
which are connected internally via a DC link.The V housing has AC pre-charging which
makes it possible to pre-charge another unit of the same size.The drive converter is
designed for 400V / 690V mains.
2.1 Product features
2.1.1 Four quadrant operation
If drive converter A operates as AFE (Active Front End), it reaches a sinusoidal current
consumption at the mains side.Operation is allowed only at symmetrical three-wire sys-
tems in combination with special AFE filters.The inverter A requires a corresponding
AFE software.At inverter B of the operation of different motors is possible.In case of
regenerative operation of the motors, the electrical power is regernerative feedback di-
rectly into the mains via inverter A.An additional feedback unit is not required.This offers
the following advantages:
• Inverter A operates as a step-up controller to stabilize the DC bus voltage.
• lower mains reactions, harmonics and commutation notches.
• no synchronization unit required.
• simple precharge of the DC link via the parallel AC input.
• feeds back excess energy from the regenerative operation into the supply mains.
• replaces brake resistor and brake transistor;reduces the heat output.
• brake transistor as an option to protection in case of power failure.
• feeds KEB drive converters individually or after consultation via DC network.
• Active power factor correction (PFC) and cos phi control possible.
• internal protection against overcurrent and overtemperature.
• at AFE operation, the DC link voltage can be varied depending on the selected
mains voltage.
•
Voltage drops to the engine which can be caused by the use of sine-wave filters,
motor chokes or filters can be compensated accordingly.
KEB offers specifically for this type of operation a complete cabinet system which can be
fitted with additional components by customer requirements.
Note to further documentation.