Power generating electric welding machine based on digital excitation accurate control

Abstract

The invention discloses a power generating electric welding machine based on digital excitation accurate control, which comprises the components of: a secondary winding, a digital controller, an excitation winding, a power generating winding, a power generating output device, an electric welding winding, a rectifier module, a motor rotor and a motor stator. The secondary winding is connected with the digital controller and cuts the magnetic field of the motor rotor. The excitation winding is mounted on the motor rotor and is connected with the digital controller. The power generating winding is mounted on the motor stator and is connected with the power generating output device and the digital controller respectively. The electric welding winding is mounted on the motor stator and is connected with the rectifier module. The rectifier module is connected with an electric welding output device and the digital controller respectively. The power generating electric welding machine has advantages of low cost, small volume, high power generating efficiency and high reliability. Through feedback adjustment of voltage and current, voltage precision and current magnitude of the electric welding machine are accurately controlled. Furthermore high electric welding quality of the electric welding machine is ensured, and energy is saved.

Description

technical field [0001] The invention relates to the field of automation control, in particular to a new generation electric welding machine based on digital excitation precise control. Background technique [0002] The power generation electric welding machine is a kind of rotating power generation powered by a gasoline engine or a diesel engine, and provides DC power for welding through a rectifier module. Also called power generation and welding dual-purpose machine, it can be used as a generator and also as a welding machine. At present, power generation welding machines have been widely used in the industrial field. [0003] At present, there are mainly four types of power generation welding machines on the market: (1) Reactor-based power generation welding machines: This type of power generation welding machine adopts the traditional power generation welding machine manufacturing process, and uses inductors or reactors to filter the welding current. The materials used...

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Problems solved by technology

[0003] At present, there are mainly four types of power generation welding machines on the market: (1) Reactor-based power generation welding machines: This type of power generation welding machine adopts the traditional power generation welding machine manufacturing process, and uses inductors or reactors to filter the welding current. The materials used are expensive and bulky

(2) Using a potentiometer to control the welding output current: This type is improved compared to the traditional power generation welding machine, but the power generation efficiency is not high, and the utilization rate of welding energy is low; (3) Inverter power generation welding machine: using inverter The principle is to increase the frequency of alternating current and rectify it as welding current

Although this type of power generation welding machine has good welding characteristics, the cost of the inverter is high and the reliability is poor

(4) Generator welding machine based on analog voltage controller: In this control mode, the output voltage of the generator cannot be precisely controlled

Moreover, the response speed of welding current adjustment is slow, which cannot meet the high-precision welding requirements

All the above types of power generation welding machines have serious defects, which limit the application range of power generation welding machines

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