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E-4

THEORY OF OPERATION

E-4

 

 

 

 

FIGURE E.4 - CONTROL BOARD & MODE SELECTION BOARD

 

 

 

 

 

 

 

 

 

MAIN

 

 

 

 

 

 

 

 

 

 

 

TRANSFORMER

 

CURRENT

 

 

 

 

 

 

 

 

 

 

 

SENSOR

 

 

 

 

 

 

LEFT

 

 

 

 

 

 

 

 

 

 

 

SWITCH

 

 

 

 

 

 

 

 

 

 

BOARD

 

 

 

OUTPUT

 

 

 

 

 

 

PWM

 

 

 

 

TERMINAL

 

 

 

 

 

 

 

 

 

 

 

 

INPUT

 

INPUT

 

 

DRIVE

 

 

 

 

 

 

CONTACTOR

RECTIFIER

R

S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E

W

 

PRIMARY

 

 

 

 

 

 

 

C

 

 

 

 

 

 

 

 

O

I

 

CURRENT

 

 

 

 

 

 

 

N

T

 

SENSOR

 

 

 

 

 

 

 

N

CAPACITOR

 

 

 

 

 

 

 

 

E

C

VOLTAGE

 

 

 

 

 

 

 

 

 

C

H

FEEDBACK

 

 

 

 

 

S

 

 

 

T

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P W

 

 

 

 

 

 

 

 

 

 

 

O

 

 

 

 

 

 

 

 

 

 

 

W I

 

 

 

 

 

 

 

 

 

 

 

T

 

 

 

 

 

RIGHT

 

 

 

 

CHOKE

E C

I

B

 

 

 

 

 

 

 

R H

 

 

 

SWITCH

 

 

 

 

 

N O

 

 

 

 

 

 

 

 

 

 

 

BOARD

 

 

 

 

 

P A

 

 

 

 

 

 

OUTPUT

 

U R

 

 

 

 

 

 

 

 

 

T

D

CONTROL SIGNALS

 

PWM

CAPACITOR

 

 

TERMINAL

 

 

 

 

 

 

DRIVE

VOLTAGE

 

THERMOSTATS

 

#1 AUX.

 

 

 

 

 

FEEDBACK

 

 

 

RECTIFIER

 

 

 

 

 

 

 

 

 

TRANS.

 

 

 

 

 

 

 

 

 

 

 

 

65VDC

 

 

 

 

 

CURRENT FEEDBACK

AUX.

 

 

 

 

 

 

CONTROL BOARD

 

 

 

 

 

 

 

 

 

 

 

 

VOLTAGE FEEDBACK

RECONNECT

#2AUX.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRANS.

FAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MOTOR

POWER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BOARD

 

 

 

 

 

 

MODE BOARD OR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40VDC

 

 

 

STATUS

ADVANCED MODE

 

 

 

 

 

 

 

 

 

BOARD

 

 

 

 

 

 

WIRE FEEDER

RS232

VOLTAGE

THERMAL

LIGHT

 

 

115VAC

 

 

 

 

 

 

 

RECEPTACLE

CONN.

SENSE

LIGHT

 

 

 

RECEPTACLE

 

 

 

 

RECEPTACLE

 

 

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CONTROL BOARD & MODE SELECTION

The control board performs the primary interfacing functions to establish and maintain output control of the INVERTEC® V450-PRO. Refer to Figure E.4. The control board sends and receives digital command information through the wire feeder receptacle and or the RS232 connector. The software that is contained within the control board processes and compares these commands with the voltage and current feed- back information it receives from the current sensor and voltage sensing leads. The appropriate pulse width modulation (PWM) signal (See Pulse Width Modulation in this section) is sent to the switch board IGBTs. In this manner, the digitally controlled high- speed welding waveform is created.

The control board also monitors the thermostats, main transformer primary current, and capacitor voltage, and activates either the thermal light and/or the status light. Dependent upon the fault situation, the control board will either disable or reduce machine output, or de-energize the main input contactor.

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

INVERTEC® V450-PRO

Page 36
Image 36
Lincoln Electric SVM199-A service manual Control Board & Mode Selection, Figure E.4 Control Board & MODE Selection Board

SVM199-A specifications

Lincoln Electric SVM199-A is a highly advanced welding machine that has garnered attention for its robust features and innovative technologies. This piece of equipment is tailored specifically for professionals in the welding industry, providing a range of functionalities that enhance productivity and efficiency.

One of the standout features of the SVM199-A is its Dual Voltage Input capability. This allows for flexibility in energy sources, making it suitable for a variety of job sites and applications. Users can easily switch between 208V and 230V, ensuring that they can operate efficiently regardless of the electrical setup available.

The machine is equipped with a powerful inverter-based design that significantly reduces its overall weight without compromising performance. This technology not only increases portability but also delivers greater energy efficiency, resulting in lower operational costs. The inverter design allows for quicker arc starts and smoother operation, which is especially beneficial for intricate welding tasks.

The SVM199-A boasts advanced digital controls that simplify the operation for both novice and experienced welders. The intuitive interface allows users to easily set and monitor welding parameters, facilitating optimal settings for various materials and thicknesses. This level of control ensures consistent weld quality and minimizes the risk of defects.

Another impressive characteristic of the SVM199-A is its multi-process functionality. It supports MIG, TIG, and Stick welding, making it versatile for various applications, from thin sheet metal work to heavy-duty repairs. This adaptability is ideal for contractors and welding professionals who often switch between different welding processes.

Additionally, the machine features a robust cooling system designed to prevent overheating during extended use. This capability not only prolongs the lifespan of the machine but also ensures reliable performance even in demanding conditions. The SVM199-A is built to withstand the rigors of frequent usage, emphasizing Lincoln Electric’s commitment to durability and quality.

Safety is paramount in welding operations, and the SVM199-A incorporates several safety features, including thermal overload protection and a protective housing design. These elements work together to safeguard both the machine and the operator, promoting a secure working environment.

In summary, Lincoln Electric's SVM199-A stands out in the welding equipment market due to its combination of advanced technology, user-friendly design, and exceptional performance capabilities. Whether for industrial applications or specialized projects, this machine is engineered to meet the rigorous demands of professionals, making it a valuable addition to any welding toolkit.