Lincoln Electric SVM152-A service manual Control Board, Toc

Models: SVM152-A

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E-4

 

THEORY OF OPERATION

E-4

 

 

 

 

 

FIGURE E.4 – POWER BOARD, CONTROL BOARD

 

 

AND SERIAL PERIPHERAL INTERFACE (SPI) COMMUNICATIONS

 

 

Main Switch Board

To Control

 

 

Board

 

 

 

Feedback Current

 

Input

 

Positive

Input switch

Primary

Output

& 100A Breaker

Rectifier

Terminal

Current

Sensor

TOC

Reconnect

Switch

Fan

115VAC Fan Supply

Auxiliary

115VAC, 42VAC Transformer 24VAC

ControlFan

Primary

Current

Sensor

Primary Current Feedback

IGBT

Input Relay Control

Soft Start Control

Drive

 

V/F Capacitor Feedback (2)

Signal

 

Choke

Negative

 

Output

 

Terminal

SenseVoltage Output

 

 

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 PinRemote Control & Trigger

Amphenol

Optional Solenoid

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POWER BOARD, CONTROL BOARD AND SERIAL PERIPHERAL INTER- FACE (SPI) COMMUNICATIONS

POWER BOARD

The 28VAC auxiliary is rectified and filtered and applied to the power board. The power board, utilizing a switching power supply, processes the 40VDC input and develops several regulated positive and negative DC supplies. Three DC supplies are fed to the control board for machine control supplies. Two positive DC voltages are coupled to the control board for the Serial Peripheral Communications (SPI) supplies. A +5VDC is used for the RS232 connection supply and a +40VDC is fed to the remote board to power an optional gas solenoid. An over or under input voltage detection and shutdown circuit is also part of the power board’s circuitry.

CONTROL BOARD

The control board performs the primary interfacing

functions to establish and maintain output control of the V350 machine. The control board sends and receives command signals from the mode panel, the status panel, the display panel and /or the optional remote panel. These communications are processed through a digital network called a Serial Peripheral Interface (SPI). This network digitally communicates to and from the control board the user’s commands and various machine status messages. The software that is contained within the control board processes and compares these commands with the voltage and cur- rent feedback information it receives from the output current sensor and the output voltage sensing leads. The appropriate pulse width modulation (PWM) signals (See Pulse Width Modulation in this section) are sent to the switch board IGBTs. In this manner, the digital- ly controlled high-speed welding waveform is created and regulated.

The control board also monitors the thermostats, the main transformer primary currents and the input capacitor voltages.

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

V350-PRO

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Lincoln Electric SVM152-A service manual Control Board, Toc

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.