AN1946 Datasheet, PDF (19/35 Pages) STMicroelectronics – SENSORLESS BLDC MOTOR CONTROL AND BEMF SAMPLING METHODS WITH ST7MC

Figure 17. Falling Demagnetization for Rising Zero crossing detection
Phase Current
AN1946
Demagnetization Debug Signal
Virtual Neutral
Phase Voltage
CD
Z
Figure 18 shows the observation of the demagnetization rising end event and falling Zero
crossing event for BEMF.
Figure 18. Rising Demagnetization for falling Zero crossing detection
C
D
Z
Phase Current
Zero Crossing Debug Signal
Virtual Neutral
Phase Voltage
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