System for driving elongated electric machines
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United States of America Patent
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Oct 21, 2014
Issued Date -
N/A
app pub date -
Dec 3, 2010
filing date -
Dec 16, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
Complete drive system, called motor-drive unit, for use in remote locations with limited radial space like downhole, narrow tunnels, pipelines and other applications with similar conditions. Given the spatial limitations the unit must have elongated shape. It includes a number of motors connected mechanically in series and a lower number of inverters, driving groups of the motors so that load is equally distributed along axis of the unit. Motors within each group can be electrically connected in series or in parallel. The motor-drive unit is supposed to be fed by DC voltage via a cable with length up to several km; therefore, it includes a buck converter for stabilization of voltage inside the unit and a power-line communication module to be controllable from the surface.
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