Hwayuan Electric LGK-40/63IGBT, Руководство оператора

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LGK-40/63IGBT OPERATOR’S MANUAL
9
current sensor connected to output terminal in series, is used as negative feedback control signal.
After comparing with current adjusting signal, the negative control signal is sent to PWM adjusting
integrated circuit, then a controlled driving pulse is output to control IGBT. Thereby a constant output
current can be maintained, and a steep dropping & constant current external characteristic is
obtained. Striking arc adopts high-frequency striking model. The main circuit refers to appendix
figure1
，
and principle diagram of control circuit is shown as figure 2.
A C
DC
DC
AC
3 - p h a s e i n p u t （ A C ）
I GBT In verte r
DC output
I G B T d r i v e
c i r c u i t
F u n d a m e n t a l
f r e q u e n c y
r e c t i f i e r & f i l t e r
R e c t i f i e r u n i t
C u r r e n t s a m p l i n g
I n d u c t a n c e
f i l t e r
H i g h f r e q u e n c y
t r a n s f o r m e r
N e g a t i v e f e e d b a c k
c o n t r o l c i r c u i t
O v e r h e a t , u n d e r v o l t a g e
p r o t e c t i o n c i r c u i t
C u r r e n t g i v i n g
c o n t r o l c i r c u i t
P I a d j u s t m e n t
c o n t r o l c i r c u i t
P W M c i r c u i t
Figure 2 Principle diagram

Common component list as diagram1
No. Symbol Components name Model Remark
1 V1 Three phase rectifier MDS40C-12
2 V2
～
V5 IGBT module
IKW25N120T2 LGK-40IGBT
IKW40N120T2 LGK-63IGBT
3 V6
、
V7 Diode module DWM2F60N060
4
TA1 Hall current sensor TKC-100BS
5 QF1 Breaker DZ47-63/3P D25
6
R5 Resistor
RXG7-10Ω/50W
7 YV1 Magnetic gas valve DF2-B-3/36V AC
8 EV1 Cooling fan 2123XSL
9 RP1 Potentiometer WH118-2W-4.7K
10 KT1 Temperature relay
JUC-6F-75
℃
normally
close
11 BP1 Pressure controller YKC 0.2/0.15
12 AP1 Main control board LGK4063IGBT-AP1
13 AP3 HF board LGK7-63AP3