Return to Master TOC

Return to Master TOC

Section E-1Section E-1

TABLE OF CONTENTS

-THEORY OF OPERATION SECTION-

Theory of Operation

Section E

General Description

E-2

Battery, Engine, Rotor, Stator and Engine Protection

E-2

Weld Windings, Rectifier, Power Module and Feedback

E-3

Analog Power Board and Control Board

E-4

Insulated Gate Bipolar Transistor (IGBT) Operation

E-5

Pulse Width Modulation

E-6

Chopper Technology Fundamentals

E-7

FIGURE E.1 – RANGER 250 BLOCK LOGIC DIAGRAM

WORK

TERMINAL

Master TOC

D W

L I

EN

WD

I

N

G

THREE-PHASE

 

__

RECTIFIER

 

 

TO

CONTROL

BOARD

+

 

 

 

ELECTRODE

 

 

IGBT

 

TERMINAL

 

 

 

 

 

4

 

CHOKE

SHUNT

+

POWER MODULE

 

 

0

 

F

 

 

TO

 

 

 

 

E

 

2

 

 

S

E

1

FROM

 

D

0

P

I

0

TOROID

B

 

G

0

 

CURRENT

W

A

V

N

 

SENSOR

M

C

 

D

A

V

 

 

K

C

 

 

L

D

 

 

 

 

 

 

S

 

C

 

 

 

 

 

 

 

 

 

Return to

STARTER

GAS

ENGINE MECHANICAL ROTATION

FLYWHEEL

ALTERNATOR

OIL

PRESSURE

SWITCH

 

 

 

ANALOG

CONTROL

 

 

 

POWER

 

ROTOR

BOARD

 

BOARD

 

 

SLIP

 

 

 

 

RINGS

 

 

 

 

 

 

 

REGULATED VOLTAGES

 

 

 

 

 

ARC OUTPUT MODE

 

STATOR

 

 

CONTROL CONTROL SELECTOR

 

 

 

 

FIELD

AUXILIARY

WIRE FEED

 

 

WINDING

WINDINGS

PWR WNDG

 

 

BATTERY

SOL

I

D

L

4

4

2

2

 

V

V

 

Return to Master TOC

RUN/STOPE

SWITCH

R

TO CONTROL

BOARD

BATTERY

BOARD

A

2

1

A

C

4

2

C

 

 

0

0

AMPHENOL

 

V

V

 

 

AA

CC

240VAC 120VAC

RECEPTACLE RECEPTACLE

RANGER 250

Page 43
Image 43
Lincoln Electric SVM150-A service manual Table of Contents Theory of Operation Section