Lincoln Electric SVM125-A service manual DC Generator Machines

Models: SVM125-A

1 110
Download 110 pages 23.24 Kb
Page 49
Image 49

E-5

E-5

THEORY OF OPERATION

Return to Section TOC

Return to Section TOC

DC GENERATOR MACHINES

The armature winding of a DC generator is located on the rotating member. Current is conducted from it by means of carbon brushes. The field winding is located in the stator, which is stationary, and is excited by direct current.

The armature coil sides are placed at opposite points on the rotating shaft with the conductors parallel to the shaft. The armature assembly is normally turned at a constant speed by a source of mechanical power con- nected to the shaft. Rotation of the armature through the magnetic field produced by the stationary field winding induces a coil voltage in the armature winding. The voltage induced in an individual armature coil is an alternating (AC) voltage, which must be rectified. In a conventional machine, rectification is provided

mechanically by means of a commutator. A commuta- tor is a cylinder formed of copper segments insulated from each other and mounted on, but insulated from, the rotating shaft. Each copper segment is connected to a corresponding armature winding. Stationary car- bon brushes held against the commutator surface con- nect the armature windings to external terminals. The commutator provides full-wave rectification, transform- ing the voltage waveform between brushes and mak- ing available a DC voltage to the external circuit.

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

 

 

C

 

F U

 

I

R

 

E R

 

L E

 

D N

 

 

T

SHUNT

FIELD WINDINGS

 

MAGNETIC FIELD

 

GENERATOR

BRUSH

 

MECHANICAL

 

 

COUPLING

 

 

ARMATURE

BRUSH

 

 

MAGNETIC FIELD

 

SHUNT

FIELD WINDINGS

 

C

F U

I R

E R

L E

D N

T

DC CURRENT

ARMATURE SHAFT

DC CURRENT

Return to Section TOC

Return to Master TOC

CLASSIC II

Page 49
Image 49
Lincoln Electric SVM125-A service manual DC Generator Machines

SVM125-A specifications

The Lincoln Electric SVM125-A is a versatile and highly efficient welding machine that has gained significant recognition in the welding industry. Designed for both professionals and enthusiasts, this machine combines advanced technology with user-friendly features to deliver outstanding performance in a range of welding applications.

One of the standout features of the SVM125-A is its Inverter Technology. This cutting-edge technology allows for lightweight and compact design, making the machine highly portable. The inverter technology also provides a steady arc, which is crucial for achieving clean, high-quality welds. With a duty cycle of 125 amps at a 60% duty cycle, this welding machine can handle a variety of materials and thicknesses, from thin sheet metal to heavier structural components.

The SVM125-A supports multiple welding processes, including MIG, stick, and TIG welding. This versatility makes it an ideal choice for diverse welding tasks, whether you're working in a fabrication shop, doing repair work, or engaged in hobbyist projects. The machine features easy switch functionality, allowing users to quickly shift between welding processes without complicated setup.

Another notable characteristic is the machine's user-friendly interface. The intuitive control panel includes clear indicators and knobs that allow for easy adjustments of voltage and wire feed speed. This design is especially helpful for novice welders, providing them with the confidence to make adjustments as needed and ensuring optimal weld quality.

Safety is also a priority with the SVM125-A. The machine is equipped with thermal overload protection, which automatically shuts it down in case of overheating, preventing damage to the unit and ensuring operator safety. Additionally, the machine features a robust construction that emphasizes durability, making it suitable for demanding work environments.

Portability is enhanced through its lightweight design, and the built-in carrying handle makes it easy to transport from one job site to another. The SVM125-A is also compatible with a variety of welding accessories, further increasing its adaptability and functionality.

In conclusion, the Lincoln Electric SVM125-A stands out as a well-rounded welding machine that integrates advanced technology with user-friendly features. Its versatility in welding processes, robust design, and emphasis on safety and usability make it a valuable tool for welders at all skill levels. Whether for professional use or personal projects, the SVM125-A is a reliable choice that delivers exceptional performance and quality.