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Section E-1Section E-1

TABLE OF CONTENTS

-THEORY OF OPERATION SECTION-

Theory of Operation

Section E

General Description

E-2

Input Line Voltage, Auxiliary Transformer and Precharge

E-2

Switch Board and Main Transformer

E-3

Power board, Control Board, and SPI Communications

E-4

Output Rectifier and Choke

E-5

Thermal Protection

E-6

Protection Circuits

E-6

Over current Protection

E-6

Under/Over Voltage Protection

E-6

Insulated Gate Bipolar Transistor (IGBT) Operation

E-7

Pulse Width Modulation

E-8

Minimum/Maximum Output

E-8

FIGURE E.1 – V350-PRO BLOCK LOGIC DIAGRAM

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Input switch

Input

& 100A Breaker

Rectifier

Reconnect

Switch

Fan

115VAC Fan Supply

Auxiliary

115VAC, 42VAC Transformer 24VAC

Main Switch Board

Primary

Current

Sensor

 

Primary

 

 

Current

 

 

Sensor

 

ControlFan

Primary Current Feedback

IGBTDriveSignal

Input Relay Control

 

Soft Start Control

 

 

V/F Capacitor Feedback (2)

 

To Control

Board

Feedback

Current

 

Positive

 

Output

 

Terminal

Choke

Negative

 

Output

 

Terminal

SenseVoltage Output

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Machine Control Supply

 

 

 

 

+15VDC, -15VDC, +6VDC

 

 

 

 

Power

 

 

 

 

 

Board SPI Supply +15VDC +5VDC

Control Board

 

28VAC

40VDC

 

 

 

 

14 Pin

RS232 Supply +5VDC

 

 

 

 

 

 

 

 

Amphenol

 

 

 

 

 

 

 

SPI Communications

& +15VDC, +5VDC Supply

 

Solenoid Supply

 

 

 

 

 

40VDC

Remote

Mode

Status

Display

 

 

Board

Panel

Panel

Panel

6 Pin

Remote Control & Trigger

 

 

 

 

Amphenol

 

 

 

 

 

Optional Solenoid

V350-PRO

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Lincoln Electric SVM152-A service manual Table of Contents Theory of Operation Section

SVM152-A specifications

The Lincoln Electric SVM152-A is a cutting-edge semi-automatic wire-feed welding machine designed for professionals seeking high performance and efficiency in their welding tasks. This versatile welding system is known for its robust engineering, advanced technology, and user-friendly features, making it a preferred choice for various applications in metal fabrication, automotive repair, and construction.

One of the standout features of the SVM152-A is its impressive versatility. It can accommodate a wide range of welding processes, including MIG, MAG, and FCAW. This flexibility allows users to switch between different welding techniques with ease, providing the adaptability needed for diverse project requirements. Additionally, the machine supports various wire diameters, catering to different welding applications and materials.

The SVM152-A boasts advanced inverter technology, which enhances its performance by increasing efficiency and reducing power consumption. This technology not only leads to lower operational costs but also provides a stable arc and improved weld quality. The inverter design enables the machine to maintain a consistent output, even in challenging conditions, ensuring a smooth welding experience.

Another key characteristic of the Lincoln Electric SVM152-A is its user-friendly interface. The machine features intuitive controls, making it accessible for both seasoned welders and those new to the craft. The digital display provides clear readings of key parameters, such as voltage and wire feed speed, allowing operators to make quick adjustments for optimal weld quality.

The construction of the SVM152-A is designed for durability and reliability. Made from high-quality materials, it can withstand the rigors of demanding work environments. The machine is also equipped with advanced cooling systems to prevent overheating during prolonged use, ensuring a longer lifespan and consistent performance.

Safety is a top priority in the design of the SVM152-A. The machine comes with built-in safety features, including thermal overload protection and circuit breakers, which help protect the equipment and the operator from potential hazards.

In summary, the Lincoln Electric SVM152-A combines versatility, advanced inverter technology, user-friendly controls, robust construction, and safety features, making it an excellent choice for professionals in various industries. Whether tackling intricate welding projects or high-volume production work, the SVM152-A delivers the performance and reliability that modern welders demand.