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Digital voltage-regulation transformer and voltage-regulation method

A technology of voltage regulating transformers and transformers, applied in the direction of regulating electrical variables, transformer/inductor coils/windings/connections, instruments, etc., can solve the problem that the influence of the overall performance of the digital welding machine is not significant, etc.

Inactive Publication Date: 2007-03-28
郝桂盛
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AI Technical Summary

Problems solved by technology

The use of DSP control technology by the internal PWM regulator of the welding power supply has certain technical advantages in control, but the effect on the overall performance of the digital welding machine is not significant

Method used

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  • Digital voltage-regulation transformer and voltage-regulation method

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Embodiment Construction

[0013] As shown in Fig. 1 and Fig. 2, taking the main circuit of the digital step-down transformer of a gas metal shielded welding machine as an example, the specific implementation of the present invention is as follows:

[0014] The number of voltage regulating windings in the figure takes n=5 as an example, which can be composed of 2 5 = 32 kinds of series combinations, these 32 kinds of series combinations of voltage regulating windings are connected to the power supply in series with the basic windings respectively, and 32 kinds of voltage values ​​can be output at the secondary side of the transformer, that is, 32 levels of voltage regulation. Among the five voltage regulating windings, W5 has the largest number of turns, corresponding to 16 in yards 8, 4, 2, and 1. The one with the least number of turns is W1, which corresponds to 1 in 8, 4, 2, and 1 yards. When W1 is connected in series with the basic winding, the value that changes the voltage is the voltage regulati...

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Abstract

Current voltage regulation mode for main loop of gas metal-arc welding is not digital. Disadvantages are: unable to control remotely or complex, not easy of maintenance, not high reliability, existed high order harmonic, and electromagnetic pollution etc. The method adopted in the invention sets up one basic winding and n pieces of regulating winding at primary side of each phase of transformer. Numbers of turns in each regulating winding are arranged according to 8, 4, 2, 1 codes in binary decimal system. When basic winding and n pieces of regulating winding are switched in series, the output voltage at secondary side is dependent to total number of turns of n pieces of regulating winding connected to basic winding in series. Thus, main loop of welder is in analog type changed to digital type so as to overcome the said disadvantages.

Description

technical field [0001] The invention relates to a digital voltage-regulating transformer and a voltage-regulating method thereof, in particular to a voltage-regulating method for a digital voltage-regulating main circuit of a gas shielded welding machine. It belongs to the field of welding technology. Background technique [0002] There are three main ways to adjust the pressure of the main circuit of the existing MIGA welding machine: [0003] The tap voltage regulation method is to set a tap on the primary side of the transformer, and change the position of the tap on the primary side of the transformer by manually operating the switch to realize the voltage regulation of the secondary side of the transformer, and then output the DC voltage through the rectifier circuit. Digital voltage regulation, remote voltage regulation and network pressure compensation cannot be realized. [0004] Thyristor phase-controlled voltage regulation type, the transformation ratio of the tr...

Claims

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Application Information

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IPC IPC(8): H01F27/28G05F1/13
Inventor 郝桂盛
Owner 郝桂盛
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