Baserunner V6 User Manual
Rev0
The regen voltage is mapped by so that regenerative braking starts at 0.8V and
reaches maximum intensity at 0.10V. This way there is no overlap between the
throttle region and the braking region and a single wire can control both ranges.
7.5 Field Weakening for Speed Boost
Basic Setup tab
The Baserunner V6 can boost the top speed of your motor beyond what is
normally possible from your battery voltage. This is accomplished by injecting a
field weakening current in advance of the torque producing current.
The amount of speed boost received for a given field weakening current will
depend on the winding characteristics of your particular motor. A trial and error
approach is recommended, increasing in small increments until the desired top
speed is achieved.
Increasing a motor’s top speed in this way is less efficient than using a higher
voltage pack or a faster motor winding, but for a speed boost of 15% to 20%, the
additional losses are quite reasonable.
The following graph shows a large direct drive hub motor’s rpm as a function of
field weakening current. The upper black line is the motor’s measured rpm, while
the initially lower yellow line is the no-load current draw, reflecting the amount of
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