Return to Section TOC

Return to Master TOC

E-2

THEORY OF OPERATION

 

E-2

 

FIGURE E-2 --- INPUT CIRCUITS

 

 

 

 

POWER SWITCH

 

 

 

 

SECTIONS

MAIN

 

RECTIFIER

 

20KHZ

CHOKE

 

TRANSFORMER

 

HEATSINK

 

LEFT SWITCH BOARD

 

 

 

 

 

 

Return to Section TOC

Return to Master TOC

 

LINE

 

SWITCH

1

 

2

 

3

3A

 

FAN

AUXILIARY

TRANSFORMER

 

TO

WIREFEEDER

 

 

FET MODULES

 

TOP

 

 

 

 

 

 

 

 

 

CAP

 

 

 

 

 

 

 

 

1 DIODE

 

 

 

FET MODULES

CURRENT

 

 

1ø OR 3ø DETETCTION (H5)

 

 

 

 

 

 

TRANSFORMER

 

 

 

 

 

 

 

 

 

PRE-CHARGE

 

 

 

 

 

INPUT

DRIVER

 

 

 

 

 

RECTIFIER

BOARD

 

 

CONTROL

5 DIODES

 

 

CR1

 

 

 

 

 

 

 

BOARD

 

 

AC1

 

PROTECTION

 

 

 

PULSE

 

 

 

 

AC2

BOARD

 

Y-Y FEEDBACK

BOTTOM

 

TRAIN

 

 

AC3

 

 

 

 

 

CR2

 

 

 

 

 

 

 

 

 

 

 

A-LEAD

 

 

 

 

 

 

24VDC

PRE-CHARGE

 

 

 

 

 

 

 

 

 

 

 

 

 

RIGHT SWITCH BOARD

 

 

18VAC

2ND STEP PWM

FET MODULES

 

5 DIODES

 

 

 

 

 

 

 

 

 

 

 

24VAC

POWERBOARD

CAP

 

 

 

 

 

 

 

 

 

 

 

 

 

TOP

 

 

 

FET MODULES

 

 

 

<1 VDC

 

 

 

 

 

 

 

1 DIODE

 

 

 

 

 

 

 

 

 

 

 

 

CHOKE

CHOKE

 

 

 

 

 

 

 

LOCAL

METER MODE

POT

POT

VOLTAGE FEEDBACK

 

 

REMOTE

 

 

 

 

 

 

1ST STEP PWM VOLTAGE

 

 

CURRENT FEEDBACK-PROTECTION

SHUNT

 

15VDC-CONTROL BOARD FUNCTION VOLTAGE

 

 

 

 

 

 

 

24VAC-THERMOSTATS-GUN TRIGGERING

 

 

 

 

Return to Section TOC

to Section TOC

Return to Master TOC

to Master TOC

INPUT LINE VOLTAGE & AUXILIARY TRANSFORMER

The V300-PRO can be connected for a variety of three phase or single phase input voltages. Power is applied through the Line Switch to the Input Rectifier and the Auxiliary Transformer.

The Reconnect Panel has switches to select high or low operating voltage. The “A” lead must then be set for the proper input voltage. It is important to set the switches and “A” lead to the proper positions before applying input power. Changing the switch position with the power applied will result in major damage to the machine

The auxiliary transformer provides 18v.a.c. and 24v.a.c. supplies to the Control and Power Boards. It also provides 115v.a.c., 42v.a.c. and 24v.a.c. supplies to the wirefeeder amphenol. (CE machines do not have 115v.a.c. supply)

The Power Board provides a 15v.d.c. supply to the Control Board and a 24v.d.c.supply to the Driver Board to operate the Pre-charge Relays.

Return

Return

NOTE: Unshaded areas of block logic diagram are the subject of discussion

V300-PRO

Page 24
Image 24
Lincoln Electric SVM105-B service manual Theory of Operation, Input Line Voltage & Auxiliary Transformer

SVM105-B specifications

The Lincoln Electric SVM105-B is a state-of-the-art welding machine that represents a leap forward in welding technology, designed for both professionals and enthusiasts in the welding industry. This versatile machine combines robust performance with user-friendly features, making it suitable for a wide range of welding applications.

One of the key features of the SVM105-B is its advanced inverter technology. This allows for a lightweight design without compromising on power output. The inverter technology ensures a stable arc and precise control, enabling consistent weld quality across various materials, including mild steel, stainless steel, and aluminum. This feature is particularly beneficial for users who demand exceptional performance in both thin and thick materials.

The SVM105-B also boasts an impressive output range, typically between 10A to 105A, allowing for adaptability to different welding tasks. Its ability to seamlessly switch between DC and AC modes makes it an ideal choice for professionals working in diverse environments, facilitating operations such as TIG and stick welding. This versatility is further enhanced by its compatibility with various electrode types, ensuring a more efficient and effective welding process.

User safety and comfort have not been overlooked in the design of the SVM105-B. Equipped with an efficient cooling system, this machine effectively manages heat during prolonged use, ensuring durability and longevity. Additionally, its intuitive digital display provides real-time feedback on settings, making it easier for users to monitor parameters and make necessary adjustments on the fly.

The SVM105-B is built with portability in mind. Its compact and lightweight design makes it easy to transport, enabling welders to bring their equipment to job sites without hassle. Furthermore, the machine features sturdy handles that contribute to its ease of maneuverability, supporting the demands of both inside workshops and outdoor projects.

Moreover, Lincoln Electric places a strong emphasis on quality and reliability, and the SVM105-B is a testament to this commitment. The machine is constructed from durable materials designed to withstand the rigors of daily use, ensuring it remains a staple in any welder's toolkit for years to come.

In conclusion, the Lincoln Electric SVM105-B stands out with its combination of advanced inverter technology, versatile output, user-friendly interface, and robust construction. Whether for professional or hobbyist use, this welding machine meets a wide array of welding needs while providing excellent performance and durability.