DRIVES CONTR S & MOTO S, C,


syste Integ


Integrated


NTROLS & MOTORS rated drive ive


system for m dium voltage applications


mfor medium voltage appl ations W


EG has launched its new VW3000 series of variabl


speed drives for voltages from 2.3kV to 8kV and power levels from 280kW o 2,400kW This m dium voltage variable speed drive i as a complete system tegrated to a sw chgear cabinet.


speed drives for voltages from


2.3kV to 8kV and power levels from 280kW to 2,400kW. This medium voltage variable speed drive is soldsol as a complete system integrated into a switchgear cabinet.


This device family is built with multilevel technology and cascaded H bridges (CHB). The multilevel topology is based on the series connection of three to ten low


bridges (C


topology i based on the series connection of three to ten low


voltage (690V) power modules with IG


voltage (690V) power m dules with IGBT output inverters in H-briidge configuration, depending on the output voltage. T is m kes it


tp inverters in d


configuration, depending on the output voltage. This makes it possible to achieve voltage levels i the mediumvoltage range using proven standard low voltage components (diodes, IGBTs and plastic filmcapacitors) in a cost- effective m nner. As a special


possible to achieve voltage levels in the medium voltage range using proven standard low voltage components (diodes, IGBTs and plastic film capacitors) in a cost- effective manner. As a special feature, the Mfeature, the MVW3000 is suppliedis supplied as a complete system integrated to a switchgear cabinet,


as a complete system tegrated into a switchgear cabinet, including medium voltage isolator, fuses, tilevel feed transform r and


frequency i verter.


diumvoltage isolator, fuses, mulltilevel feed transformer and frequency inverter.


“The present voltage and power range is only the first stage in the product evolution. Higher voltages and power levels are already avai ble upon request,” says hannes Schwenger, head of


atW “T


“The present voltage and power range is only the first stage in the product evolution. Higher voltages and power levels are already available upon request,” says Johannes Schwenger, head of product management, low voltage andmediumvoltage drive systems, ro


high-performance, al solution,


h el for additional -one ediumvoltage cluding


is d vice family is built w th evel technology and cascaded ). T e m ltilevel


EG has launched its new MVW3000 series of variable


motor speed range and is more than 96 per cent with load levels above 40 per cent. The charging circuit for the m ltilevel power transformer ensures transformer core m gnetisation w thout inrush currents and gentle charging of the DC l nk capacitors for the i verter. The power transformer enables adaptation of them s voltage to them tor output voltage and reduction of the com


n-mode n-mode cur ents


tor speed range and is m re than 96 per cent with l ad l vel above 40 per cent. The charging circuit for the multilevel power transformer ensures transformer core magnetisation without inrush currents and gentle charging of the DC link capacitors for the inverter. The power transformer enables adaptation of the mains voltage to the motor output voltage and reduction of the common-mode voltage on the motor winding. It also educes com


voltage on them tor wnding. It also reduces common-mode currents through the motor bearings in order to


ximse b aring life. T


through them tor bearings in order to maximise bearing life. The interfaces between the frequency inverter CPU and the power stage for BT control temperature


terfaces between the frequency verter CPU and the power stage for IGBT control, temperature


monitoring, voltage feedback and current feedback are i plemented using fibre optics to increase noise im


nity and provide effective


nitoring, voltage feedback and current feedback are implemented using fibre optics to increase noise immunity and provide effective isolation between the control and power sections. The power stages (H bridges) are bui t with plastic fi capacitors, semconductor fuses and an automatic i verter bypass function to provide higher system availability in the event of a fau t. The virtual y sinusoidal output


dissipation, vibrations and torque pulsation in the motor.


In the interests of enhanced In the interests of enhanced


reliability and system availability, he M


reliability an systemavailability, the MVW3000 is equipped with motor protection devices for protection against overload, overheating and m tor rotor


000 i equipped wi


tor protection devices for protection against overload, overheating and motor rotor


blockage. The temperatures of the power stage and transformer are also constantly m nitored. As a package system, the


blockage. The temperatures of the power stage and transformer are also constantly monitored. As a package system, the


productmanagement, w voltage and medium voltage drive systems, Europe at WEG. “The MVW3000 is ais a high-performance, all-in-one solution, which eliminates the need for additional medium voltage


ates the need


switchgear. This variable speed drive systemfeatures outstanding input and output parameters, energy efficiency an


switch ear. This variable speed drive system features outstanding input and output parameters, energy efficiency and high availability.”gh availability.” Inverter efficiency of the


MVW3000 variable speed drive system, including the transformer, exceeds 95 per cent over the entire


Inverter efficiency of the 3000 variable speed dri


system, including the transformer, exceeds 95 per cent over the entire


MVW3000 simplifies installation and commissioning. The plug-in pow r stages facilitate easy


sim lifies installatio


and com ssioning. The plug-i power stages facilitate easy


maintenance and fast replacement. th di


1,100m


systemalso has a small footprint. Furthermore, it can optionally be equipped with commonly used


tenance and fast replacement. With dimensions of 3,900 x 2,210 x 1,100mm, the variable speed drive system also has a small footprint. Furthermore, it can optionally be equipped w th com only used


nsions of 3,900 x 2,210 x the variable speed drive


FEAT RE FEA ATURE


isolation between the control and power sections. The power stages (H bridges) are built with plastic film capacitors, semiconductor fuses and an automatic inverter bypass function to provide higher system availability in the event of a fault. The virtually sinusoidal output voltage and current reduce powervoltage and current reduce power dissipation, vibrations and torque lsation in them tor.


industrial communication protocols, cluding M dbus, Profibus, Devicenet and Ethernet.


WEG ww


T: 01527 513800T: 01527 513800 www.weg.net/uk www.we /AUTOMAT /AUTOMA ION ATION


ndustrial com unication protocols, including Modbus, Profibus, Devicenet and Ethernet.


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