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E-3

E-3

THEORY OF OPERATION

FIGURE E.3 – EXCITER FEEDBACK, CONTROL BOARD, LOCAL AND REMOTE CONTROL

SCR/DIODE

 

OUTPUT

OUTPUT

 

 

CHOKE

BRIDGE

 

 

NEGATIVE

 

 

CV

ITORS

TERMINAL

CV

CAPAC

 

TERMINAL

 

SHUNT

POSITIVE

TERMINAL

 

 

WINDINGS

 

F

 

 

 

B

 

WELD

 

FEEDBACK

E

 

 

 

 

E

STARTER

 

 

 

D

 

 

 

 

A

 

 

 

 

C

ALTERNATOR

 

 

 

K

ENGINE

MECHANICAL

ROTOR

 

SCR GATE SIGNALS

 

ROTATION

 

 

 

 

 

 

 

SHUTDOWN

 

 

 

 

 

SOLENOID

 

 

 

 

 

 

 

EXCITER

 

 

 

 

 

WINDINGS

 

 

 

 

IDLER

 

 

 

CV

 

 

 

 

BOARD

BATTERY

SOLENOID

 

 

 

 

 

 

 

 

42VAC

 

 

 

 

115VAC

METER

 

 

 

 

 

EXCITER

 

14 PIN

 

MAIN

 

CAPACITORS

 

REMOTE

CONTROL

 

 

AMPHENOL

 

115/230VAC

 

SWITCH

BOARD

 

 

BY-PASS

 

RECEPTACLE

 

PC

 

 

 

 

6 PIN

BOARD

 

 

 

 

AMPHENOL

 

 

 

 

 

 

FINE

 

ENGINE

 

 

 

OUTPUT

ENGINE

SENSORS

 

 

 

CONTROL

 

 

 

PROTECTION

BOARD

EXCITER VOLTAGE

FEEDBACK

BOARD

CURRENT/ MODE

SELECTOR

SWITCH

12VDC

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EXCITER FEEDBACK, CONTROL BOARD, LOCAL AND REMOTE CONTROL

The exciter voltage is monitored and fed back through the exciter voltage feedback board to the control board. In the event the exciter voltage increases or decreases to an unacceptable level, the engine protection circuit shuts off the engine.

The control board compares the commands of the cur- rent/mode selector and the fine output control (or remote control) with the output voltage and current feedback and sends the appropriate SCR gate firing signals to the SCR/Diode bridge.

The Commander 400 is controlled by a high quality microcontroller, which is the main circuit element of the control board.

The control board also supplies operating voltages and control signals to the CV board, the meter board, and the engine protection board.

The remote control and contactor signals are fed to the control board through the amphenols and the by-pass board.

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

COMMANDER 400

Page 51
Image 51
Lincoln Electric SVM133-B service manual Itors

SVM133-B specifications

The Lincoln Electric SVM133-B is an innovative welding machine designed to meet the diverse needs of welders and fabrication shops. This versatile equipment combines state-of-the-art technology with user-friendly features, making it ideal for both novice and professional welders.

One of the main features of the SVM133-B is its advanced inverter technology. This allows for a more efficient power delivery, which translates into reduced energy consumption and lower operational costs. The machine is capable of delivering optimal welding performance across a range of materials, from thin sheets to heavier sections, making it suitable for various applications in industries such as automotive, construction, and repair.

The SVM133-B supports multiple welding processes, including MIG, stick, and TIG welding. This flexibility ensures that users can adapt to various job requirements without needing multiple machines. The intuitive control panel allows users to switch between modes effortlessly, providing a seamless welding experience.

Another notable characteristic of the SVM133-B is its compact and lightweight design. Weighing significantly less than traditional welding machines, it is highly portable, making it easy to transport to different job sites. Additionally, its rugged construction ensures durability, allowing it to withstand tough working conditions.

The SVM133-B is equipped with advanced safety features, such as overheat and overload protection, which safeguard both the machine and the user during operation. It also includes a digital display that provides real-time feedback on settings, voltage, and amperage, which enhances precision and control during welding tasks.

Lincoln Electric has prioritized ease of use in the SVM133-B, with quick setup guides and clear instructions. This user-centric approach not only facilitates a smoother learning curve for beginners but also optimizes the workflow for experienced welders, enabling them to maximize productivity.

One of the standout features is the capability to weld aluminum with ease, thanks to its spool gun compatibility. This feature sets the SVM133-B apart from many competitors, providing added value for users who require flexibility in their welding projects.

In summary, the Lincoln Electric SVM133-B stands out in the welding machine market due to its inverter technology, multi-process capabilities, portability, and robust safety measures. It embodies the perfect blend of innovation and practicality, making it a top choice for welders looking to enhance their skills and productivity across a wide array of applications. Whether for professional use or hobbyist projects, the SVM133-B offers a reliable solution for high-quality welding tasks.