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Zero crossing detect(11), Description – Daewoo DPB-280LH User Manual

Page 31

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30

DESCRIPTION

It detect Zero Cross part of Trans output voltage, Transistor TR2 is used to put in the Micom.
Detail Driving is as following Fig 11-1.

MICOM

TRANS
OUTPUT

D5

D6

R3
5.6K

1

2

CC8
103

TR2
KRC102M

1

2

1

2

3

2

1

R5
10K

R6
1K

VCC

31

DETECT POINT

H

The
Number
31 of
Micom
terminal

AC18V

L

Fig 11-1

Zero Crossing Detect(11)