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Lincoln Electric SVM152-A service manual Insulated Gate Bipolar Transistor Igbt Operation

Models: SVM152-A

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E-7

E-7

THEORY OF OPERATION

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INSULATED GATE BIPOLAR TRANSISTOR (IGBT) OPERATION

An IGBT is a type of transistor. IGBT are semiconduc- tors well suited for high frequency switching and high current applications.

Example A in Figure E.8 shows an IGBT in passive mode. There is no gate signal, zero volts relative to the source, and therefore, no current flow. The drain ter- minal of the IGBT may be connected to a voltage sup- ply; but since there is no conduction, the circuit will not supply current to components connected to the source. The circuit is turned OFF like a light switch.

Example B shows the IGBT in an active mode. When the gate signal , a positive DC voltage relative to the source, is applied to the gate terminal of the IGBT, it is

capable of conducting current. A voltage supply con- nected to the drain terminal will allow the IGBT to con- duct and supply current to the circuit components coupled to the source. Current will flow through the conducting IGBT to downstream components as long as the positive gate signal is present. This is similar to turning ON a light switch.

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FIGURE E.6 – IGBT

POSITIVE

VOLTAGE

APPLIED

 

GATE

 

GATE

SOURCE

SOURCE

n +

n +

n +

n +

p

BODY REGION

p

BODY REGION

n -

DRAIN DRIFT REGION

n -

DRAIN DRIFT REGION

n +

BUFFER LAYER

n +

BUFFER LAYER

p +

INJECTING LAYER

p +

INJECTING LAYER

DRAIN

 

DRAIN

 

A. PASSIVE

 

B. ACTIVE

 

V350-PRO

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Lincoln Electric SVM152-A service manual Insulated Gate Bipolar Transistor Igbt Operation
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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.