Minarik NRG-2Q Series, User Manual

Page: 11 / 60

5
Regenerative Drives
Most non-regenerative, variable speed, DC drives control current
flow to a motor in one direction. The direction of current flow is
the same direction as the motor rotation. Non-regenerative drives
operate in Quadrant 1 (see Figure 2, page 6). Unless dynamic
braking is used, non-regenerative drives decelerate a load faster
than coasting to a lower speed.
NRG–2Q drives operate in Quadrants 1 and 4. In Quadrant 4, the
direction of current flow is in the opposite direction of motor
rotation. This allows regenerative drives to control an
overhauling load and decelerate a load faster than it would take to
coast to a lower speed.
250-0246r2_readers.qxd 6/7/01 10:51 AM Page 5