Functional Principle - KEB COMBIVERT R6-S Applications Manual

Product overview

1.2.3 Functional principle

After switching on the DC interconnection is supplied with voltage after correct initialisation phase. If the voltage
in the DC interconnection exceeds an adjustable threshold due to generative operation, the COMBIVERT R6-S
starts to regenerate the energy into the net by square-wave modulation. The COMBIVERT can synchronize to
mains frequency by a sychronization module in front of the commutation throttle, or harmonic filter, so regenera-
tion is done synchronously to the mains frequency.A sine-wave current is formed of it at the harmonic filter. The
compliance with the requirements in accordance with EN 61000-3-12 is secured only by the harmonic filter.
If the regenerative power decreases an adjustable value, the COMBIVERT R6-S switches off the regeneration
after expiration of a turn-off delay and it will be turn into motoric operation.
Page 1.2 - 4 COMBIVERT R6-S © KEB, 2008-02