KR200309063Y1 - A be private an alternating current electronic apparatus of welding machine - Google Patents

Abstract

The present invention relates to an apparatus for supplying power to an arc welder, in particular one rectifier for rectifying single-phase or three-phase alternating current power with a direct current, a smoothing part for smoothing the rectified rectified current, and a smoothed current Conventional unnecessary work by simplifying one power converter converting the frequency period directly into a frequency period suitable for arc welding. The present invention relates to an AC-only power supply device whose utility can be greatly improved by converting inverter power to an arc welder instead of an inverter power conversion function.

Description

Alternating current power supply of arc welding machine {A be private an alternating current electronic apparatus of welding machine}

The present invention provides a rectifier for rectifying a single-phase or three-phase alternating current power source of a 60 Hz single-phase or three-phase power supply, and a smoothing portion for smoothing by reducing the pulsation of the rectified current rectified in the rectifier. And a power conversion unit for directly converting the frequency period of the current smoothed by the smoothing unit to 50 to 500 Hz, and is a conventional unnecessary fabric. The present invention relates to an AC dedicated power supply device having a simple structure that can be substantially improved by rectifying only an AC power source that is commonly used instead of an AC power converter function and converting the power into a frequency suitable for arc welding and supplying the arc welder.

In general, referring to FIG. 2, a conventional power supply device for supplying power to an arc welder includes a primary rectifying unit 11 for rectifying primary or direct current power to a DC current, and a smoothing unit 12 for smoothing the rectified power source. ) And a primary power converter 13 for firstly converting the frequency period of the smoothed current to 10 to 100 kHz by a control signal from a control circuit (not shown), and a voltage required for welding the converted current. The main transformer 14 stepped up by stepping, the secondary rectifying part 15 stepping up the stepped-up current into a direct current, and the frequency period of the rectified current by a control signal from a control circuit (not shown). And a secondary power converter 16 for secondary conversion at-500 Hz, a reactor, and a high voltage induction transformer. Such a conventional power supply device can convert both DC power and AC power to inverter power to supply power to an arc welder, but the power loss is excessive due to the inverter power conversion over two times, and the rectifier and the power converter are configured as double power supplies. The reliability of the device is lacking, and when arc welding with AC power, there is a problem that the power is unstable, which leads to a poor welding state.

An object of the present invention is to provide a rectifier for rectifying a single-phase or three-phase AC power supply of 60 Hz, a smoother for smoothing the rectified rectified current, and one power for converting the frequency period of the smoothed current to 50 to 500 Hz. The present invention provides a dedicated AC power supply device for an arc welding machine, which rectifies only a commonly used AC power source including a converter and converts and supplies power at a frequency suitable for arc welding.

1 is a circuit diagram of a power supply device of the present invention

2 is a circuit diagram of a conventional power supply device

Explanation of symbols on the main parts of the drawings

11: rectifier

12: smoothing part

13 power conversion unit

14: main transformer

15: secondary rectifier

16: secondary power conversion unit

The AC dedicated power supply device of the arc welding machine of the present invention reduces one pulsation portion of the rectifying current rectified by the rectifying unit 11 and the rectifying unit 11 for rectifying a single-phase or three-phase alternating current power of 60 Hz into a direct current. The smoothing part 12 which smoothes, and the one power converter 13 which converts the frequency period of the current smoothed by the smoothing part 12 to 50-500 Hz suitable for arc welding are comprised.

With reference to the drawings and embodiments will be described in detail the configuration of the subject innovation.

Figure 1 shows a circuit of the power supply of the arc welding machine according to the present invention and Figure 2 shows a circuit of the power supply of the conventional arc welder.

In the power supply apparatus of the arc welding machine according to the present invention, one rectifier 11 and one power converter 13 are configured to convert only AC power into inverter power to supply power to the arc welder.

In order to convert the frequency period of the current into a predetermined range in the power converter 13, the rectifier 11 for rectifying the alternating current into a direct current in the previous step of the power converter 13 should be configured, the rectified current It should be converted to a frequency period of 50 to 500 Hz to be suitable for arc welding.

A rectifying section 11 is formed which is connected to a single-phase or three-phase alternating current power plug having a frequency period of 60 Hz, which is commonly used, and rectifies the alternating current of the plug into a direct current. The rectified current rectified by the rectifying unit is applied to the smoothing unit 12.

A smoothing portion 12 is formed to reduce and smooth the pulsation portion of the rectified current applied from the rectifying portion 11. The current smoothed by the smoothing unit 12 is applied to the power converter 13.

A power converter 13 for directly converting the current applied from both ends of the smooth portion 12 to a frequency period of 50 to 500 Hz suitable for arc welding is formed. The power converter 13 is connected to a control circuit (not shown), and the frequency smoothed by the smoothing unit 12 is controlled at a frequency of 50 to 500 Hz by a control signal from the control circuit (not shown). Configured to convert directly to a period. The current directly converted by the power converter 13 at a frequency period of 50 to 500 Hz is applied to the main transformer 14.

Welding a main transformer 14 for boosting the current applied from the power converter 13 to a voltage required for welding, a reactor for providing a reactance to the boosted current in the main transformer 14, and a current applied from the reactor A high voltage induction transformer that is stepped up to a high voltage necessary for starting is formed in turn to constitute a power supply device for an arc welder.

As described above, the power supply device of the present invention including one rectifier 11 and one power converter 13 includes a primary rectifier 11, a primary power converter 13, and a secondary rectifier 15. Compared with the conventional power supply device including the and the secondary power converter 16, the structure is simple, the reliability is excellent, and the manufacturing cost is low. In addition, since the inverter power conversion function combined with the conventional direct and alternating current power supply of the conventional power supply device is omitted, only the AC power used in general is converted to inverter power to supply power to the arc welder, which is excellent in practicality.

With reference to the embodiment will be described in detail the operation of the present invention.

The rectifier 11 of the power supply device of the arc welder is connected to a single-phase or three-phase AC power plug having a frequency period of 60 Hz. An AC power source having a frequency period of 60 Hz is rectified as a DC current in the rectifying unit 11 and applied to the smoothing unit 12, and the rectified rectifying current is smoothed by reducing the pulsation portion in the smoothing unit 12, thereby converting the power into a power converting unit ( 13, and the smoothed current is directly converted into a frequency period of 50 to 500 Hz suitable for arc welding by a control signal from a control circuit (not shown) in the power conversion section 13, so that the main transformer 14 Is applied. The current converted by the power converter 13 is boosted to the voltage required for welding in the main transformer 14, the reactance is given in the reactor, and boosted to the high voltage required to start welding in the high voltage induction transformer to perform arc welding Done.

AC dedicated power supply device of the arc welding machine according to the present invention is a conventional unnecessary. By omitting the inverter power conversion function combined with the AC power supply, only the AC power that is normally used is directly converted to the inverter power, and the utility is greatly improved. The power supplied to the arc welder is stabilized, thereby improving the accuracy of arc welding.

Claims (1)

In the power supply of the arc welder, One rectifier 11 for rectifying a 60-Hz single-phase or three-phase alternating current power supply with a direct current, a smoothing unit 12 for smoothing by reducing the pulsation portion of the rectified current rectified by the rectifier 11, and the smoothing An AC dedicated power supply device for an arc welder, characterized in that one power converter (13) is configured to directly convert the frequency period of the smoothed current in the unit (12) to 50 to 500 Hz suitable for arc welding.