MSK4470 Datasheet, PDF (4/7 Pages) M.S. Kennedy Corporation – 10 AMP, 500V, 3 PHASE IGBT BRUSHLESS MOTOR CONTROLLER

APPLICATION NOTES CONTINUED
COMMUTATION TRUTH TABLE
HALL SENSOR PHASING
120°
60°
HALL HALL HALL HALL HALL HALL
A
B
C
A
B
C
ICOMMAND = POS.
AØ BØ CØ
1
0
0
1
0
0
H
-
L
1
1
0
1
1
0
-
H
L
0
1
0
1
1
1
L
H
-
0
1
1
0
1
1
L
-
H
0
0
1
0
0
1
-
L
H
1
0
1
0
0
0
H
L
-
1
1
1
1
0
1
-
-
-
0
0
0
0
1
0
-
-
-
X
X
X
X
X
X
L
L
L
ICOMMAND = NEG.
AØ BØ CØ
BRAKE
L
-
H
0
-
L
H
0
H
L
-
0
H
-
L
0
-
H
L
0
L
H
-
0
-
-
-
0
-
-
-
0
L
L
L
1
1 = High Level
0 = Low Level
X = Don't Care
H = SOURCE
L = SINK
- = OPEN
NOTE:
Because of the true 4 quadrant method of output switching,
the output switches will PWM between the ICOMMAND POSITIVE
and ICOMMAND NEGATIVE states, with the average percentage
based on ICOMMAND being a positive voltage and a negative
voltage. With a zero voltage ICOMMAND, the output switches will
modulate with exactly a 50% duty cycle between the
ICOMMAND POSITIVE and ICOMMAND NEGATIVE states.
4
Rev. B 10/00