Lincoln Electric INVERTEC SVM199-A - Manual (Page 33)

TABLE OF CONTENTS-THEORY OF OPERATION SECTION E-1 E-1
INVERTEC® V450-PRO
Theory of Operation ................................................................................................................................. Section E
Block Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-1
General Description, Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-2
Switch Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-3
Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-4
Output Rectifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-5
Thermal Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-6
IGBT Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-7
Typical IGBT Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-8
FIGURE E.1 BLOCK LOGIC DIAGRAM
INPUT CONTACTOR INPUT RECTIFIER R E C O N N E C T CONTROL BOARD RIGHT SWITCH BOARD LEFT SWITCH BOARD MAIN TRANSFORMER CURRENT SENSOR CHOKE OUTPUT TERMINAL OUTPUT TERMINAL POWER BOARD 115VAC RECEPTACLE P O W E R S W I T C H I N P U T B O A R D FAN MOTOR AUX. TRANS. AUX. TRANS. RECTIFIER AUX. RECONNECT PRIMARY CURRENT SENSOR WIRE FEEDER RECEPTACLE RS232 CONN. THERMOSTATS STATUS LIGHT THERMAL LIGHT CURRENT FEEDBACK VOLTAGE FEEDBACK 65VDC 40VDC CONTROL SIGNALS PWM CAPACITOR VOLTAGE FEEDBACK PWM DRIVE VOLTAGE SENSE RECEPTACLE #1 #2 S W I T C H DRIVE FEEDBACK VOLTAGE CAPACITOR
INPUT
CONTACTOR
INPUT
RECTIFIER
R
E
C
O
N
N
E
C
T
CONTROL BOARD
RIGHT
SWITCH
BOARD
LEFT
SWITCH
BOARD
MAIN
TRANSFORMER
CURRENT
SENSOR
CHOKE
OUTPUT
TERMINAL
OUTPUT
TERMINAL
POWER
BOARD
115VAC
RECEPTACLE
P
O
W
E
R
S
W
I
T
C
H
I
N
P
U
T B
O
A
R
D
FAN
MOTOR
AUX.
TRANS.
AUX.
TRANS.
RECTIFIER
AUX.
RECONNECT
PRIMARY
CURRENT
SENSOR
WIRE FEEDER
RECEPTACLE
RS232
CONN.
THERMOSTATS
STATUS
LIGHT
THERMAL
LIGHT
CURRENT FEEDBACK
VOLTAGE FEEDBACK
65VDC
40VDC
CONTROL SIGNALS
PWM
CAPACITOR
VOLTAGE
FEEDBACK
PWM
DRIVE
VOLTAGE
SENSE
RECEPTACLE
#1
#2
S
W
I
T
C
H
DRIVE
FEEDBACK
VOLTAGE
CAPACITOR
Return
to
Master
T
OC
Return
to
Master
T
OC
Return
to
Master
T
OC
Return
to
Master
T
OC