SIMOVERT MV Medium-Voltage Drives 660 kVA to 9100 ... - Industry

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SIMOVERT MV6SE80 Drive ConvertersDesign3Water-cooled drive convertersA water-to-water cooling unitis an integral part of the watercooledSIMOVERT MV driveconverter.The cooling unit is used to dissipatethe power loss from thedrive converter. It has an innerand an outer water circuit.The water of the outer circuitcools the inner circuit via theheat exchanger.The closed and vented innerwater circuit is filled with finewater. Fine water is de-ionizedwater with a very low conductivity.The water’s conductivitymust be low since the heat sink,through which the water flows,is on the same voltage level asthe HV-IGBT, and thus on thesame level as the DC link.Intake and outlet pipes are fittedbetween each phase stack.Cold water coming from thecooling unit flows into the inletpipe, is heated-up by the powerloss in the HV-IGBT and thenreturns to the cooling unit viathe outlet pipe (see Fig. 3/7).A floor-mounted pan is installedin the drive converter cabinet inwhich, if there is a leak, the wateris collected. A leakage watermonitoring function allows theleak to be quickly found if coolingwater is lost.Fig. 3/4SIMOVERT MV with water cooling (without cooling unit)Fig. 3/5Cooling unit (closed and open), in a special version with option W01 and stainless steel piping3/6 Siemens DA 63 · 2004
SIMOVERT MV6SE80 Drive ConvertersDesignThe water-cooled Power-Cardis a plug-in module just like theair-cooled Power-Card. If thePower-Card is to be replaced,the water circuit must beopened. This would mean thatair would enter the water circuitwhich would have to be subsequentlyvented. In order toavoid this, the Power-Cards areequipped with special connectors.These connectors preventair from entering the system.Thus, it is no longer necessaryto subsequently vent thesystem, i.e. the drive converteris quickly operational again.3Fig. 3/6Water-cooled Power-Card with pipe connectionsRectifierInverterIntakeDischargeLeakage water monitoringin the floor panelFig. 3/7Cooling of the drive converter power sectionSiemens DA 63 · 2004 3/7
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SIMOVERT MV Medium-Voltage Drives 660 kVA to 9100 ... - Industry

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