Manuals / Lincoln Electric / Power Tools / Welder

Lincoln Electric SVM148-B Theory of Operation, BATTERY, STARTER, Engine, Glow PLUGS, Engine

Models: SVM148-B

1 140
Download 140 pages 28.49 Kb
Page 55
Image 55

to Section TOC

to Master TOC

E-2

E-2

THEORY OF OPERATION

FIGURE E.2

BATTERY, STARTER, ENGINE, GLOW PLUGS,ENGINE PROTECTION,

ROTOR, STATOR AND IDLER SOLENOID

RANGE

SWITCH

Return

RANGER 300 DLX

AC

OUTPUT

RECTIFIER

BRIDGE

PART OF CHOKE RANGE

SWITCH

POLARITY SWITCH

WORK

TERMINAL

REACTOR

SHUTDOWN

SOLENOID

AC

CAPACITORS

cv output

contactor

ELECTRODE TERMINAL

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

STATOR

GLOW PLUGS

ENGINE

MECHANICAL

ROTOR

 

ROTOR

 

 

ROTATION

 

STARTER

SLIP

 

 

 

MOTOR

 

RINGS

 

 

OIL &

 

 

 

WATER

 

 

 

SENSORS

 

 

IDLER

 

 

 

SOLENOID

 

 

 

ALTERNATOR

 

 

 

 

 

FIELD

115 & 230VAC

 

 

BRIDGE

RECEPTACLES

BATTERY

 

PRINTED

 

 

 

 

 

 

CIRCUIT

 

 

 

BOARD

 

FIELD

CAPACITOR

 

BY-PASS

 

 

BOARD

CONTACTOR CLOSURE

 

CONTACTOR CLOSURE

 

 

 

OUTPUT

 

 

CONTROL

 

 

REMOTE

 

 

SWITCH

 

 

42VAC

 

 

115VAC

 

6 PIN

14 PIN

 

AMPHENOL

 

AMPHENOL

 

 

 

BATTERY, STARTER, ENGINE,

feedback winding and the auxiliary power winding for

GLOW PLUGS, ENGINE

wire feeders. The field feedback winding provides

rotor current during machine operation. The output of

PROTECTION, ROTOR, STATOR

the Ranger 300 is dependent on two criteria, the

AND IDLER SOLENOID

engine RPM and the amount of current in the rotor

winding.

 

to Section TOC

to Master TOC

The 12VDC battery powers the starter motor and glow plugs. The glow plugs are used to preheat the diesel engine to enhance starting. When the engine is start- ed and running, the battery circuit voltage is fed through the printed circuit board to the rotating field coil in the rotor via a brush and slip ring configuration. This excitation (“flashing”) voltage magnetizes the rotor lamination. The rotor is mechanically coupled to the engine. This rotating magnet induces a voltage in the stationary windings of the main alternator (stator). There are four separate and isolated windings incorpo- rated in the stator lamination assembly. Each set has a different number of turns producing different magni- tudes of AC output voltages. These four windings are the weld winding, the auxiliary power winding, the field

The engine alternator supplies “charging” current for the battery circuit. The battery circuit provides power for the printed circuit board and also for the idler sole- noid. The idler solenoid is mechanically connected to the engine's throttle linkage. If welding or auxiliary current is being drawn from the Ranger 300, the print- ed circuit board activates the idler solenoid, which then brings the engine to the high RPM state. When no output current is sensed, either weld or auxiliary, the printed circuit board deactivates the idler solenoid and the engine returns to low RPM.

The engine protection circuit shuts the engine off in the event of low oil pressure or engine coolant over-tem- perature.

Return

NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.

RANGER 300 D AND 300 DLX

Page 54 Page 56
Page 55
Image 55
Lincoln Electric SVM148-B Theory of Operation, BATTERY, STARTER, Engine, Glow PLUGS, Engine, PROTECTION, ROTOR, Stator
Page 54 Page 56

SVM148-B specifications

The Lincoln Electric SVM148-B is a state-of-the-art inverter-based power source designed for both professional welders and hobbyists. As a versatile machine, it excels in a variety of welding applications including MIG, TIG, and stick welding. This machine is particularly notable for its efficiency and portability, making it an ideal choice for on-site projects or workshops where space is limited.

One of the main features of the SVM148-B is its inverter technology. Unlike traditional transformer-based welders, inverter welders are typically lighter and more compact. This means that users can transport the machine more easily without sacrificing power or performance. The SVM148-B is capable of delivering a substantial amperage range, allowing for adjustments that suit various materials and thicknesses, from thin sheet metal to thicker plates.

The machine offers adjustable output levels, providing precise control over the welding process. This level of control is essential for achieving clean, strong welds and is especially useful when working with different materials. The SVM148-B is equipped with digital display features that provide real-time feedback on power settings and welding parameters, allowing welders to make quick adjustments as needed.

Another significant advantage of the SVM148-B is its duty cycle, which is designed to accommodate extended usage without overheating. A robust duty cycle means that professionals can rely on this machine for prolonged periods, making it a dependable choice for heavy-duty tasks.

The SVM148-B also includes advanced safety features such as overload protection, which ensures that the machine will shut down in the event of excessive current draw. This feature not only protects the equipment but also enhances user safety during operation.

Moreover, the machine is compatible with a wide variety of welding wires and electrodes, adding to its versatility. Whether you're working with stainless steel, aluminum, or mild steel, the SVM148-B can adapt seamlessly.

In conclusion, the Lincoln Electric SVM148-B combines advanced inverter technology with user-friendly features, making it an invaluable addition to any welding setup. Its portability, control options, robust duty cycle, and safety measures set it apart as a reliable and efficient welding solution for professionals and hobbyists alike. Whether for a small workshop or large industrial applications, the SVM148-B meets the demands of modern welding with efficiency and ease.