- 11 April 2007 -

99% efficiency with medium voltage drive

WEG has developed a range of medium voltage drives which, it says achieves 99% medium voltage (MV) drive efficiency. This is due to a new design that employs Multilevel Topology to minimise component levels, and high voltage (6.5kV) IBGT's to reduce motor harmonic currents to extremely low levels.

The MVW-01 range has a two-layer control, unlike many MV drives on the market, which have 3 or 5 layer control. This reduces the number of components in the drive, and improves efficiency and reliability.

The MVW-01 drives are Voltage Source Inverters (VSI) and integrate a 32-bit high-performance processor (64-bits bus) with floating point capability and can provide high-performance control of MV motors in the voltage range from 2.3 to 4.16kV, and in the power range up to 3,355kW. The MVW-01 drives are suitable for WEG's "H" Line of MV motors, which cater for outputs to 3,150kW and voltages up to 6,600V (50 or 60Hz).

Housed in IP41/NEMA 1 enclosures, the MVW-01 drives are configured for 12- pulse operation, with 18-pulse available upon request. This result in a high power factor (< 0.95) that fully meets the requirements of G5/4 and IEEE-519.

The MVW-01 drives have low noise levels (<75dBa) and the design includes the latest generation of high voltage (6.5kV) IBGT's, provides optical isolation between the control section and the high voltage sections of the drives, and employs ultra-reliable dry-type plastic film power capacitors.

www.weg.com.br

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