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R/L
(resistance/limited) drivers are, by today's standards, old
technology but still exist in some (low power) applications
because they are simple and inexpensive. The drawback to
using R/L drivers is that they rely on a "dropping resistor"
to get almost 10 times the amount of motor current rating
necessary to maintain a useful increase in speed. This
process also produces an excessive amount of heat and must
rely on a DC power supply for it's current source. |
