M30622 Mitsubishi, M30622 Datasheet - Page 107

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M30622

Manufacturer Part Number
M30622
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Manufacturer
Mitsubishi
Datasheet

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Timers’ functions for three-phase motor control
Figure 1.18.6. Timing chart of operation (1)
phase waveform. In this way, a waveform can be picked up from the applicable terminal in a manner in
which the "L" level of the U phase waveform doesn’t lap over that of the U phase waveform, which has the
opposite phase of the U phase waveform. The width of the “L” level too can be adjusted by varying the
values of timer B2, timer A4, and timer A4-1. In dealing with the V and W phases, and V and W phases,
the latter are of opposite phase of the former, have the corresponding timers work similarly to dealing with
the U and U phases to generate an intended waveform.
U phase
output signal
Trigger signal for
timer Ai start
(timer B2 overflow
signal)
Timer A4 output
Control signal for
timer A4 reload
U phase
output signal
U phase
U phase
B2
Signal wave
A carrier wave of triangular waveform
Tentative Specifications REV.A
S
pecifications in this manual are tentative and subject to change.
Carrier wave
___
Dead time
Note: Set to triangular wave modulation mode and to three-phase mode 1.
m
Timber B2 interrupt occurres
Rewriting timer A4 and timer A4-1.
Possible to set the number of overflows to generate an
interrupt by use of the interrupt occurrences frequency
set circuit
n
m
107
n
m
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
p
o
Mitsubishi microcomputers
M16C / 62T Group
___
The three-phase
shift register
shifts in
synchronization
with the falling
edge of the A4
output.
___

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