User Manual

Table Of Contents
Using the Controller with a Power Supply
Advanced Digital Motor Controller User Manual 31
Avoid deceleration that is quicker than the natural deceleration due to the friction
in the motor assembly (motor, gears, load). Any deceleration that would be quicker
than natural friction means that braking energy will need to be taken out of the sys-
tem, causing a reverse current flow and voltage rise.
Place a battery in parallel with the power supply output. This will provide a reservoir
into which regeneration current can flow. It will also be very helpful for delivering
high current surges during motor acceleration, making it possible to use a lower
current power supply. Batteries mounted in this way should be connected for the
first time only while fully charged and should not be allowed to discharge. The power
supply will be required to output unsafe amounts of current if connected directly to a
discharged battery. Consider using a decoupling diode on the power supply’s output
to prevent battery or regeneration current to flow back into the power supply.
Place a shunt regulator such as Roboteq’s SR5K. This device will monitor the
voltage at the controller and place resistive load in parallel with the power supply
in order to absorb the regenerated current. The diagram below shows to wire the
SR5K shunt regulator.
Power
Supply
Motor
Controller
Shunt Regulator
V+
V+
V-
V-
+
-
-
+
FIGURE 1-5. Shunt Regulator wiring
Note: The schematic above is provided for reference only. It may not work in all conditions.