User Manual

Brushless Motor Connections and Operation
102 Advanced Digital Motor Controller User Manual V2.0, July 8, 2019
Motor
U
V
W
Vw-u
Probe
Probe
Rotate
shaft
clockwise
GND Clip
GND Clip
Hall Sensor Power and Pull-ups
HA
Va
+5V
2-10k
2-10k
2-10k
HB
HC
GND
5V
FIGURE 8-6. Use an oscilloscope and the circuit in figure to place the probes and generate these signals
Important Warning
Hall Sensor misalignment cannot be corrected by the controller. Contact the motor
manufacturer for remedy.
Sinusoidal Commutation
In sinusoidal commutation, all three wires are permanently energized with a sinusoidal
current that is 120 degrees apart on each phase as shown in figure 8-7.
1
11 21 31 41 51 61 71 81 91
101 111 121 131 141 151 161 171 181 191 201 211 221 231 241 251 261 271 281 291 301 311 321 331 341 351 361 371 381 391 401 411 421 431 441 451 461 471 481 491 501 511 521 531 541 551 561 571
581
591 601 611 621 631
641 651
661 671 681 691 701 711
V
U
W
FIGURE 8-7. Three phase current creating a rotating magnetic field
At its most basic operation, the controller measures the rotor’s angular position, adds or
subtracts 90o depending on the desired rotation direction, and applies the result to the
3-phase PWM generator.