Determination Of Commutation Vector For Ccw - Motorola M68HC08 Manual

Software Design
Table 6-2. Determination of Commutation Vector for CCW
Sector Commutation Vector
Phase A
-V +V
I
DCB
+V
II NC
+V
III NC
DCB
+V -V
IV
DCB
-V
V NC
-V
VI NC
DCB
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defined. Table 6-2. Determination of Commutation Vector for CCW
shows the vectors for counterclockwise direction of rotation that ensures
the variation of real angle from 60° to 120° (see chapter
Commutation). The Hall sensor pattern, considered as a binary
number, results in a decimal number from 1 to 6 (e.g. 101 in binary form
corresponds to decimal number 5). From Table 6-2. Determination of
Commutation Vector for CCW we can see that commutation vector A
corresponds to decimal Hall sensor pattern 5, commutation vector B to
number 1, etc.
Phase B Phase C
NC A
DCB
-V
B
DCB DCB
-V
C
DCB
NC D
DCB
+V
E
DCB DCB
+V
F
DCB
In the case of clockwise direction of rotation, the commutation vector can
be determined using the Table 6-3. Determination of Commutation
Vector for CW.
Software Design
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Determined Hall Sensor Pattern
Vector
HS A
1 0
0 0
0 1
0 1
1 1
1 0
3.4
Pattern
HS B HS C
Result
1 5
1 1
1 3
0 2
0 6
0 4
DRM046 — Rev 0
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HS