SIMOVERT MASTERDRIVES Vector Control - Industry

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SIMOVERT MASTERDRIVES Vector ControlEngineering InformationSingle drivesCompact PLUS/compact andchassis units · cabinet unitsNotes on selecting the power sections (continued)Converters for the individualdrive can be selected accordingto criteria, with regard tothe rated output current, asdescribed in sections entitled“Configuring of drives”.The converters are also availableas cabinet units (seeSection 4) with the appropriateoptions.The converters must be protected,according to requirements,with the permissibleovercurrent and shortcircuit-limitingcomponentson the system supply side.Depending on customers’needs, additional switchgearmay be required.In the control cabinet, the radio-interferencesuppressionfilter should be installed asnear as possible to the connectingpoint for the supplyvoltage.Operation of a supply-sidemain contactor K1 is possibledirectly via the On functionof the terminal stripand the interfaces of theSIMOVERT MASTERDRIVESelectronics (external 24 V DCsupply needed).U1/L1V1/L2W1/L3PEPE1PE2U1/ V1/ W1/L1 L2 L3M3 ACDA65-5842aK1X9:5X9:4X9:2X9:1C/L+D/L-AC 230VLine fusesMain switchRadio-interference suppression input filter A1Main contactorLine commutation reactorTerminals for 24 V DC auxiliary supplyBraking unitOutput reactorSinewave filter or dv/dt filterOutput contactorFig. 6/14Block diagram of a converter (sizes E to K)66/10Siemens DA 65.10 · 2003/2004
Compact PLUS/compact andchassis units · cabinet unitsSIMOVERT MASTERDRIVES Vector ControlEngineering InformationMulti-motor drivesFor multi-motor drives,inverters are connected toa common DC bus. The DCsupply is produced from thethree-phase AC system byrectifier units, rectifier/regenerativeunits or AFE rectifier/regenerative units.If this method is used withinverters connected to aDC link, the following advantages,in comparison to singleconverters, can be madeuse of: When individual motorsare working in regenerativemode, energy is exchangedvia the DC link. If regenerativeoutput sometimesoccurs, e.g. simultaneousshutdown of all drives, acentral braking unit can beprovided.The Compact PLUS rectifierunits already have an integralbraking unit. In comparison to singleconverters, the amount ofmounting space requiredcan be reduced. Supplysidecomponents such asfuses, contactors andswitchgear as well as linecommutating reactors onlyhave to be provided once ata central location.In order to reduce systemperturbations, the centralsupply rectifier can be eithera 12-pulse converter or anAFE rectifier/regenerativeunit.M3ACM3ACM3ACM3ACM3ACTDA65-5296Fig. 6/15Multi-motor drive6Siemens DA 65.10 · 2003/20046/11
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