DC arc welding power rectifier system, typically by the beginning of the secondary winding of each main transformer isolated, unregulated semiconductor rectifier element footprint device outside the desired characteristics, a pointing device like composition obtained, together with the pliers and can be manual arc welding with .
The most commonly used arc welding rectifier, according to the principle of action of the adjusting device into three categories: post movable type, moving coil, magnetic amplifier type and a thyristor type. Moving iron rectifying-modulating activities arc city principle similar activities city East iron type arc welding transformer, the transformer output voltage but a silicon diode rectifier into DC, and then by filtering the output of the reactor, thereby obtaining a DC output. Dynamic welding rectifier bridge rectifier device is often composed of three.
Magnetic Amplifier Arc Welding Rectifiers are available in three versions, internal feedback, no feedback, and external feedback to regulate the current to achieve the desired output characteristics. However, since the magnetic amplifier is a product with high energy consumption and consumables, it is troublesome to manufacture, and has been eliminated with the development of the electronics industry.
Thyristor arc welding rectifier with good controllability. The control of the external characteristic shape and the adjustment of the welding specification can be realized by changing the conduction angle of the thyristor.
The composition of the thyristor arc welding rectifier: the circuit block diagram of the rectifier, see Figure 5.5.4. Its main circuit is composed of transformer B, thyristor rectifier group SCR and output reactor DK. The triggering of the thyristor consists of a trigger circuit C and a synchronization circuit T. The triggering of the thyristor consists of a trigger circuit C and a synchronization circuit T. When the falling external characteristic is required, the phase of the trigger pulse is determined by the given voltage Ugi and the current feedback signal Ufi; when the flat-out characteristic is required, the trigger pulse phase is given by the given voltage Ugu and the voltage feedback signal Ufu and the voltage feedback signal Ufu determine.
The most commonly used arc welding rectifier, according to the principle of action of the adjusting device into three categories: post movable type, moving coil, magnetic amplifier type and a thyristor type. Moving iron rectifying-modulating activities arc city principle similar activities city East iron type arc welding transformer, the transformer output voltage but a silicon diode rectifier into DC, and then by filtering the output of the reactor, thereby obtaining a DC output. Dynamic welding rectifier bridge rectifier device is often composed of three.
Magnetic Amplifier Arc Welding Rectifiers are available in three versions, internal feedback, no feedback, and external feedback to regulate the current to achieve the desired output characteristics. However, since the magnetic amplifier is a product with high energy consumption and consumables, it is troublesome to manufacture, and has been eliminated with the development of the electronics industry.
Thyristor arc welding rectifier with good controllability. The control of the external characteristic shape and the adjustment of the welding specification can be realized by changing the conduction angle of the thyristor.
The composition of the thyristor arc welding rectifier: the circuit block diagram of the rectifier, see Figure 5.5.4. Its main circuit is composed of transformer B, thyristor rectifier group SCR and output reactor DK. The triggering of the thyristor consists of a trigger circuit C and a synchronization circuit T. The triggering of the thyristor consists of a trigger circuit C and a synchronization circuit T. When the falling external characteristic is required, the phase of the trigger pulse is determined by the given voltage Ugi and the current feedback signal Ufi; when the flat-out characteristic is required, the trigger pulse phase is given by the given voltage Ugu and the voltage feedback signal Ufu and the voltage feedback signal Ufu determine.
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