Small yet powerful drive

GE's Power Conversion business unveils its new powerful MV7-Series, ultimate waveform, multilevel, high-power drive, the MV7-Series Drive with UWave technology. The water-cooled UWave drive is based on GE's MV7 technology. GE adopted the same MV7 technology and used the same components, but arranged them in a different way, shifting from 3 level to 5 level. The increased number of levels means increased voltage and power output. As an extension of the existing MV7 drive platform, the new UWave drive can operate at up to 13.8kV with a power capacity of up to 40MW in a single thread. The MV7 UWave drive produces clean power with few harmonics. When feeding into motors, it reduces motor stress and can help increase its life expectancy. Higher power quality also results in cleaner electrical signals making the drive more compatible with the grid, allowing smoother grid integration and a more resilient grid network. The smaller filter means a smaller footprint for the entire system, which brings significant benefits across industries. Based on a customer study in the wind industry, the footprint of the system (drive and filter combined) can achieve up to 40% reduction compared to a 3-level drive. Reliability is reinforced by capacitors installed in the drive. An advanced mechanism adopted inside the drive enables immediate isolation of a failed capacitor. Unaffected by this single failure, the rest of the capacitors allow the drive to operate without interruption. The MV7 UWave drive uses standardized component during manufacturing, and is designed to drive induction, synchronous, or high-speed motors (up to 300Hz) for high-voltage and high-power applications. Several configurations of the MV7 series are available-diode front-end (DFE), active front-end (AFE), N+1 redundancy, transformer-less-to adapt different customer and project needs. It also allows easier integration to the fixed frequency system to become variable speed-a key factor to enable energy efficiency.

GE Power Conversion | www.gepowerconversion.com


Volume: 2016 September/October