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Special generator unit for mobile AC steel rail welding machine

A technology for generator sets and generators, which is applied to control generators, control generators and electrical components through magnetic field changes, etc., can solve the problems of high energy consumption and high construction cost, achieve long equipment life, high efficiency, and reduce transient output. The effect of voltage drop

Active Publication Date: 2011-10-05
GUANGZHOU SUNYEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, the existing mobile AC rail welding machine dedicated generator set has the defects of large energy consumption and high cost.

Method used

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  • Special generator unit for mobile AC steel rail welding machine
  • Special generator unit for mobile AC steel rail welding machine
  • Special generator unit for mobile AC steel rail welding machine

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Experimental program
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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] figure 2 It is a schematic diagram of the structure of a traditional generator set, which uses thyristors for voltage regulation. The engine 11 drives the three-phase synchronous generator 7, and the three-phase synchronous generator 7 has a built-in automatic point voltage regulator 6. After the output voltage of the generator set is adjusted by the potentiometer as required, the constant voltage output is realized through its own voltage closed-loop regulation circuit. That is, regardless of the load size, a high steady-state voltage adjustment rate is guaranteed (consistent with the requirements of conventional generators). The magnitude of the welding current at each stage must be realized by changing the conduction angle of the thyristor 10 (the output is non-sinusoidal alternating current). The stability and limitation of the welding current is sampled...

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Abstract

The invention discloses a special generator unit for a mobile AC steel rail welding machine, which comprises an engine, a generator, a programmable controller and a current transmitter, wherein the generator is driven by the engine, the generator is a high-power electric excitation single-phase synchronous generator, a digital voltage regulator is built in the generator, and the digital voltage regulator regulates excitation parameters to regulate the output voltage of the generator; the current transmitter is arranged in an output loop of the generator and is used for sending current signalsin the output loop of the generator to the programmable controller; and the programmable controller is electrically connected with the digital voltage regulator. The output size of the generator is directly and quickly regulated through the programmable controller according to the welding process in advance, the matching power of the generator can be further reduced, and meanwhile, the welding quality can be improved.

Description

technical field [0001] The invention relates to the field of rail transit engineering construction equipment, in particular to a generator set dedicated to a mobile AC rail welding machine. Background technique [0002] Among the existing domestic and foreign application technologies, the most widely used in rail mobile construction is to use a diesel engine to drive a three-phase AC excitation synchronous generator with constant voltage operation to provide mobile welding power for orbital welding machines. The power supply circuit of the welding power supply is connected to the primary winding of the single-phase transformer of the welding equipment through a high-current (1400-2000A) bidirectional thyristor. flow. Due to the use of thyristors for phase-shifting and voltage regulation, phase-shifting and chopping lead to a large number of high-order harmonics in the current, and the high-order harmonic components suppress the output power of transformers and generators, a...

Claims

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Application Information

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IPC IPC(8): H02P9/14H02P9/10
Inventor 郑浩郑全
Owner GUANGZHOU SUNYEAR TECH