Table of Contents
Advertisement
M
1
6
C
2 /
6
A
G
o r
u
p
(
M
1
6
Carrier wave: sawtooth waveform
Signal wave
Timer B2
Start trigger signal
for timer A4*
Timer A4
one-shot pulse*
U phase
output signal *
U phase
output signal *
U phase
INV14 = 0
("L" active)
U phase
U phase
INV14 = 1
("H" active)
U phase
* Internal signals. See the block diagram of the three-phase motor control timer function.
Shown here is a typical waveform for the case where INVC0= 01XX110X
system) and INVC1 = 010XXX00
• Initial values of IDB0 and IDB1 registers: DU0=0, DUB0=1, DU1=1, DUB1=1. The register values are
changed to DU0=1, DUB0=0, DU1=1, DUB1=1 a timer B2 interrupt occurs.
Figure 12.3.10. Sawtooth Wave Modulation Operation
R
e
. v
2
0 .
0
F
e
b
1 .
, 5
2
0
0
7
R
E
J
0
9
B
0
2
0
2
0 -
2
0
0
C
2 /
6
, A
M
1
6
C
2 /
6
, B
M
1
6
Carrier wave
. An example for changing PWM outputs is shown below.
2
page 127
f o
3
2
9
C
2 /
6
) T
Rewriting IDB0, IDB1 registers
Dead time
Dead time
(X = set as suitable for the
2
Transfer to three-phase
output shift register
12. Timer
Advertisement
Table of Contents
