Semi-direct variable speed drive with N+1 power availability
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United States of America Patent
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May 7, 2013
Grant Date -
Sep 9, 2010
app pub date -
Mar 1, 2010
filing date -
Mar 3, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A system for controlling a speed of each of N variable speed motors with a drive voltage is disclosed, where N is an integer equal to or greater than 1. The system includes (N+1) generators and a switching arrangement configured to directly couple, in a one-to-one relation, the N variable speed motors to the (N+1) generators so that any one of the N variable speed motors is capable of operating in at least a first mode and a second mode. In the first mode the any one of the N variable speed motors is driven with the drive voltage generated by a first generator of at least two of the (N+1) generators, and in the second mode the any one of the N variable speed motors is driven with the drive voltage generated by a second generator of the at least two of the (N+1) generators.
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