Difference between standalone and sectional(multi) Drive 1

[santhosh652]

Hello all,

Can somebody tell me the Difference between standalone and sectional(multi) Drive?

Thanks
Santhosh

 

[ozmosis]

Usually, a standalone drive (typically referred to as a converter) consists of a rectifier, DC link and inverter section. AC is supplied to the rectifier, converted to DC then smoothed out on the DC link that usually has capacitors and possibly some inductive components to 'clean' the DC and then it goes into the inverter section whereby it is chopped into pulses to re-create a sinusoidal waveform that allows you to vary frequency and voltage.
Typically they are all in one enclosure and built as a complete unit.
A sectional drive is typically one larger rectifier that can be non- regenerative or regenerative (active or not) and this feeds a DC link that consists of multiple inverters that feed off this common DC link. Each inverter section are independently running motors that can be 1quadrant or 4 quadrant driven and sometimes have the ability to either take power from the DC link or return power to the DC link. If taking, this comes from the rectifier or other inverters that could be regenerating.
Common applications for the latter are paper processes, steel rolling processes, printing machines etc.