User Manual

Table Of Contents
Brushless Motor Connections and Operation
100 Advanced Digital Motor Controller User Manual V2.0, July 8, 2019
V. See figure 8-4. The sine wave voltage will be inverted when turning the motor in the
opposite direction.
Vv-u Vw-vVu-w
Va Vb Vc
FIGURE 8-4. Relation between hall sensor and U V W windings
Determining the Wiring Order Empirically
While probing with an oscilloscope gives the definite order, a simpler and quicker way is
to find the correct combination by trial and error. To do this, you can either connect the
motor wires permanently and then try different combination of Hall sensor wiring, or you
can connect the Hall sensors permanently and try different combinations of motor wiring.
There is a total of 6 possible combinations of wiring three sensors on three controller
inputs. There are also 6 possible combinations of wiring three motor wires on three con-
troller outputs. Only one of the 6 combinations will work correctly and smoothly while
allowing the controller to drive the motor in both directions.
Alternatively, instead of swapping Hall sensors or motor phases, you can use the “Hall
Sensor Map” configuration from the PC Utility menu (see “HSM” in the command refer-
ence section)., or from the following console command:
^HSM ch nn
Try each of the 6 available values of HSM (0-5) and retain the one that will make the motor
spin in both directions while drawing the same low current.
When testing a combination, apply a low amount of power (5 to 10%). Applying too high
power may trigger the stall protection. Once a combination that make the motor spin is
found, increase the power level and verify that rotation is smooth, at very slow speed and
at high speed and in both directions.
Important Notice
Beware that while only one combination is valid, there may be other combinations
that will cause the motor to spin. When the motor spins with the wrong wiring
combination, it will do so very inefficiently. Make sure that the motor spins equally
smoothly in both directions. Try all 6 combinations and select the best.