Description Of Software; Output Pattern Switching - Renesas M16C/Tiny User Manual

2 Description of Software

2.1 Output Pattern Switching

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