Determination Of Commutation Vector For Cw; Commutation Table - Motorola M68HC08 Manual

Table 6-3. Determination of Commutation Vector for CW
Sector Commutation Vector
Phase A
+V -V
I
DCB
+V
II NC
DCB
+V
III NC
-V +V
IV
DCB
-V
V NC
DCB
-V
VI NC
6.3.3 Determination of Commutation Table
DRM046 — Rev 0
MOTOROLA
Freescale Semiconductor, Inc.
Phase B Phase C
NC D
DCB
-V
C
DCB
-V
B
DCB DCB
NC A
DCB
+V
F
DCB
+V
E
DCB DCB
In the application software, the commutation vectors are defined in a
table of 8 values (entry 0-7). Any Hall sensor pattern gives the right
pointer to the table of commutation vectors. For our example, the
commutation table shown in
used. Please note that Hall sensor pattern 0 [000] and 7 [111] indicates
a fault, since such a combination is not available during normal
operation. Such a state can be caused, e.g. by a disconnected Hall
sensor interface, or it's malfunction. In that case, the output channels are
switched off (output signals are put into a safe state) in order to protect
the drive.
Software Design
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Application Porting for the Customer Specific BLDC Motor
Determined Hall Sensor Pattern
Vector
HS A
1 0
1 0
1 1
0 1
0 1
0 0
Table 6-4. Commutation Table
Software Design
Pattern
HS B HS C
Result
1 5
0 4
0 6
0 2
1 3
1 1
shall be
Designer Reference Manual
HS
55