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Lincoln Electric SVM148-B service manual Rotor Field FEEDBACK, Auxiliary and Wire Feeder Power

Models: SVM148-B

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Section TOC

Master TOC

E-3

E-3

THEORY OF OPERATION

FIGURE E.3

ROTOR FIELD FEEDBACK, AUXILIARY AND WIRE FEEDER POWER

RANGE

SWITCH

Return to

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RANGER 300 DLX

AC

OUTPUT

RECTIFIER

BRIDGE

PART OF CHOKE RANGE

SWITCH

POLARITY SWITCH

WORK

TERMINAL

REACTOR

SHUTDOWN

SOLENOID

AC

CAPACITORS

cv output

contactor

ELECTRODE TERMINAL

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STATOR

GLOW PLUGS

ENGINE

MECHANICAL

ROTOR

ROTOR

 

ROTATION

STARTER

SLIP

 

MOTOR

 

RINGS

OIL &

WATER

SENSORS

IDLER

SOLENOID

ALTERNATOR

FIELD

115 & 230VAC

BRIDGE

RECEPTACLES

BATTERY

PRINTED

CIRCUIT

BOARD

FIELD

CAPACITOR

BY-PASS

BOARD

CONTACTOR CLOSURE

CONTACTOR CLOSURE

OUTPUT

CONTROL

REMOTE

SWITCH

42VAC

115VAC

6 PIN

14 PIN

AMPHENOL

AMPHENOL

 

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ROTOR FIELD FEEDBACK, AUXILIARY AND WIRE FEEDER POWER

The AC voltage developed in the field winding is fed to the full wave field bridge. The DC output of the field bridge is filtered by the field capacitor and controlled by the printed circuit board according to the setting of the machine’s output control or remote control. This filtered and controlled voltage is fed to the rotor wind- ing via the brush and slip ring configuration. As the feedback voltage is increased or decreased, the out- puts of the weld and auxiliary windings are increased or decreased.

When full field voltage is applied to the rotor and the engine is running at high speed (3600 RPM), a 230VAC voltage is developed in the stator auxiliary winding. This winding is tapped to provide 115VAC. The two voltages (115VAC and 230VAC), are connected to the appropriate receptacles and offer 12,000 watts (total) of AC power.

The auxiliary wire feeder winding offers 115VAC and is tapped to also provide 42VAC. The current draw from this winding should be limited to 8 amps. These volt- ages and remote control signals are fed through the by-pass (filter) board to the amphenol receptacles.

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

RANGER 300 D AND 300 DLX

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Lincoln Electric SVM148-B service manual Rotor Field FEEDBACK, Auxiliary and Wire Feeder Power
Page 55 Page 57

SVM148-B specifications

The Lincoln Electric SVM148-B is a state-of-the-art inverter-based power source designed for both professional welders and hobbyists. As a versatile machine, it excels in a variety of welding applications including MIG, TIG, and stick welding. This machine is particularly notable for its efficiency and portability, making it an ideal choice for on-site projects or workshops where space is limited.

One of the main features of the SVM148-B is its inverter technology. Unlike traditional transformer-based welders, inverter welders are typically lighter and more compact. This means that users can transport the machine more easily without sacrificing power or performance. The SVM148-B is capable of delivering a substantial amperage range, allowing for adjustments that suit various materials and thicknesses, from thin sheet metal to thicker plates.

The machine offers adjustable output levels, providing precise control over the welding process. This level of control is essential for achieving clean, strong welds and is especially useful when working with different materials. The SVM148-B is equipped with digital display features that provide real-time feedback on power settings and welding parameters, allowing welders to make quick adjustments as needed.

Another significant advantage of the SVM148-B is its duty cycle, which is designed to accommodate extended usage without overheating. A robust duty cycle means that professionals can rely on this machine for prolonged periods, making it a dependable choice for heavy-duty tasks.

The SVM148-B also includes advanced safety features such as overload protection, which ensures that the machine will shut down in the event of excessive current draw. This feature not only protects the equipment but also enhances user safety during operation.

Moreover, the machine is compatible with a wide variety of welding wires and electrodes, adding to its versatility. Whether you're working with stainless steel, aluminum, or mild steel, the SVM148-B can adapt seamlessly.

In conclusion, the Lincoln Electric SVM148-B combines advanced inverter technology with user-friendly features, making it an invaluable addition to any welding setup. Its portability, control options, robust duty cycle, and safety measures set it apart as a reliable and efficient welding solution for professionals and hobbyists alike. Whether for a small workshop or large industrial applications, the SVM148-B meets the demands of modern welding with efficiency and ease.