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Triac Driving (7)
MICOM
38
DESCRIPTION
Number 38 Terminal of Micom is put out Pulse Output, by way of Buffer it is driving Photo Triac K3021PG and
then Triac SM3JZ47 is supplied Trigger Signal.
Trigger Test of Triac is detected Zero Cross Part of AC input and it is triggered from Zero Cross part to Time
delay part according to Fan Speed. (Ref. Fig 7-1) SN1 is Snubber.
AC220V
TRIGGER
MOTOR
INPUT
KID 65004
R4
1K
LOW SPEED
12V
R5 100
1
2
TLP560J
MEDIUM SPEED
Fig 7-1
38
L1
TRIAC
SM3
JZ47
SN1
0.1µF+120
HIGH SPEED
L AC220V
TO MOTOR
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