• Danfoss Industries Private Limited

Low Harmonic Drive

Danfoss Industries Private Limited, a leader in mechanical and electronic components and solutions, has announced the launch of the first mass produced VLT® Low Harmonic Drive. This mimimises the harmonic disturbances on the supply grid by actively imposing currents into the grid so that the high quality sine wave of the grid current is restored. Like other Danfoss VLT drives, the Low Harmonic Drive is built on a highly modular technology platform which has been very successful in proving their functionality, quality and overall reliability in other parts of the broad VLT drives program. This has the same modular build-up as Danfoss’ normal high power drives and share features like high energy efficiency, backchannel cooling and user-friendly operation. Due to the modular principle, most elements are produced in large scale, leading to cost effective production. These drives are motor friendly with output impulse and shaft voltages compatible with motors conforming to IEC60034-17/25, as per standard VLT Drives. Available in the power range of 160-710 kW, the VLT Low Harmonic Drive meets the toughest harmonic recommendations and gives the user full readout of the unit performance towards the grid including graphical overview of grid behaviour. It also meets the IEEE519 recommendation for short circuit ratios >20 and is suited for low voltage power supply grids, including generator powered installations like in back-up systems. These are available in VLT AutomationDrive, VLT Aqua Drive and VLT HVAC Drive configuration, where the standard drive ratings cover 0.25 kW to 1.4 MW and include a range of passive and active harmonic mitigation solutions.