Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

E-3

E-3

THEORY OF OPERATION

FIGURE E.3 – ENGINE GENERATOR ARMATURE AND FRAME, ALTERNATOR STATOR AND ROTOR

 

PROTECTION

 

 

 

SELECTOR

 

 

 

 

 

RELAY

 

 

 

 

 

 

 

 

 

 

 

 

SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

REED

 

 

 

 

IDLER

 

 

 

 

 

RELAY

NEGATIVE

 

 

BOARD

 

 

 

 

 

CR2

 

 

 

 

 

 

 

 

 

 

OUTPUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TERMINAL

 

 

 

 

 

 

 

 

115 & 230VAC

 

 

 

 

 

 

 

 

 

 

RECEPTACLES

 

 

 

 

IDLER

 

 

 

 

 

 

 

 

 

SOLENOID

 

 

 

 

 

 

 

 

 

OIL

 

 

GENERATOR

 

 

 

 

 

TEMPERATURE

PRESSURE

 

 

 

FRAME

 

 

 

 

 

GAUGE

SWITCH

 

 

 

 

 

CURRENT

 

 

FUEL

 

 

SERIES

 

 

 

 

 

 

INJECTION

 

 

COILS

 

 

 

 

TRANSFORMER

 

 

PUMP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BRUSHES & COMMUTATOR

 

ALTERNATOR

STATOR

 

SWITCH

ENGINE

 

 

ARMATURE

 

 

SLIP

 

 

 

ENGINE

MECHANICAL

GENERATOR

 

ARMATURE

ROTOR

 

 

IGNITION

 

 

COUPLING

 

 

 

SHAFT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ALTERNATOR

 

 

 

 

 

 

 

RINGS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INTERPOLE

 

 

 

 

 

 

 

 

 

COILS

RESIDUAL

 

 

 

 

 

 

STARTER

 

 

MAGNETISM

FLASHING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MOTOR

 

 

FIELD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SHUNT

 

 

 

 

 

 

 

 

 

WINDINGS

 

 

 

 

 

 

 

 

 

 

 

 

FIELD

 

 

 

BATTERY

 

 

 

 

 

RECTIFIER

 

 

 

 

 

 

 

GENERATOR

 

 

 

 

 

 

 

 

 

FIELD CONTROL

 

 

POSITIVE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTPUT

 

 

 

 

 

 

 

 

 

 

TERMINAL

Return to Section TOC

Section TOC

Return to Master TOC

Master TOC

ENGINE, GENERATOR ARMATURE AND FRAME, ALTERNATOR STATOR AND ROTOR

EXCITATION (FLASHING)

When the engine is started and running, the residual magnetism voltage is applied to the alternator rotor via a brush and slip ring configuration. This excitation (“flashing”) voltage magnetizes the rotor lamination. The alternator rotor is connected to the armature shaft, which is mechanically coupled to the engine. This rotating magnet (rotor) induces a voltage in the station- ary windings of the alternator stator.

AUXILIARY AND FIELD FEEDBACK COILS

There are two isolated windings incorporated in the sta- tor lamination assembly. One of these windings is tapped and provides 115VAC and 230VAC of auxiliary power to the appropriate receptacles. The other 115VAC isolated winding is rectified to a DC voltage and is used to supply field feedback voltage to the rotor. It also, through the generator field rheostat control, sup- plies voltage to the field shunt windings in the main generator frame.

Return to

Return to

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

SA-250

Page 51
Image 51
Lincoln Electric SVM128-A service manual Excitation Flashing, Auxiliary and Field Feedback Coils

SVM128-A specifications

The Lincoln Electric SVM128-A is a cutting-edge welding machine designed to meet the demands of both professional welders and DIY enthusiasts. This versatile welding power source brings together advanced technology and robust design, making it a reliable choice for various welding applications.

One of the standout features of the SVM128-A is its capability to perform multiple welding processes. It supports MIG, TIG, and stick welding, allowing users to tackle a wide range of projects with ease. This multi-functionality makes it ideal for professionals working in different industries, as well as for hobbyists who enjoy diverse welding tasks.

The SVM128-A is equipped with inverter technology, which enhances its performance by providing a more stable arc and improved energy efficiency. This technological advancement contributes to lower operational costs and allows for a more consistent weld quality across different materials and thicknesses. Additionally, the inverter technology enables the machine to be lightweight and portable, making it convenient for jobs that require mobility.

Another prominent characteristic of the SVM128-A is its user-friendly interface. The machine features intuitive controls and a digital display that allows operators to easily set the desired welding parameters. This simplified setup helps reduce the learning curve for new users while also offering precise control for experienced professionals.

The Lincoln Electric SVM128-A is designed with durability in mind. Its robust construction ensures that it can withstand the rigors of frequent use in demanding environments. The machine is also equipped with various safety features, including thermal overload protection and a duty cycle rating that prevents overheating, ultimately extending its lifespan.

For optimal performance, the SVM128-A provides adjustable output options, allowing users to customize the welding parameters based on their specific needs. This flexibility makes it suitable for welding various metals, including steel, aluminum, and stainless steel.

In summary, the Lincoln Electric SVM128-A combines versatility, advanced technology, and a user-friendly design. With its capability to perform multiple welding processes, lightweight construction, and durable features, it stands out as an excellent option for anyone looking to achieve high-quality welds. Whether for professional or personal use, the SVM128-A is poised to deliver reliable performance and exceptional results.