RSBJEUM0001-0101 Rev. 1.01
9
2 Description of Software
2.1 Output Pattern Switching
Figure 3.1.1 Time Charting
Pattern 5
Pattern 0
Pattern 1
Pattern 2
Pattern 3
Pattern 4
Pattern 5
Zero-crossing
Switch the output pattern 30
degree after the zero-crossing
of the induced voltage
0
1
3
2
4
5
Calcultation the actual rotation speed
from intervals between zero-crossings
of the induced voltages
U-BEMF
V-BEMF
W-BEMF
Up
Un
Vp
Vn
Wp
Wn
