JP4290613B2 - Battery-powered engine-driven welding machine - Google Patents

Description

  The present invention relates to a battery combined type engine-driven welder that uses both an engine welder and a battery welder, and more particularly to an apparatus that sets a share ratio of output currents of both welders.

  This type of battery-coupled engine-driven welder is such that the output of the battery welder is added to the output of the engine welder. For this reason, the emphasis is placed only on the fact that a large welding current can be obtained while being small and light, and the focus was placed on the sharing of the welding output current that takes advantage of the characteristics of the engine welding machine and the battery welding machine. There is no battery-powered engine-driven welder.

  For example, in Patent Document 1, a changeover switch is provided to switch between the case where the output of the engine welder and the output of the battery welder are output in parallel and the case where the output is output separately. The case of each output is set to the small output mode. In the case of the high output mode, the ratio of welding current sharing between the engine welder and the battery welder is manually set by the operator each time.

In Patent Document 2, the welding output current is divided into a weak current region, a medium current region, and a strong current region, and the current region is switched by a changeover switch. In the middle current region and the strong current region, the output of the battery welder is added to the output of the engine welder without considering the share of the welding output current.
JP 4-135070 A Utility Model Registration No. 2525401

  In both cases of Patent Document 1 and Patent Document 2, the share of the welding current between the engine welder and the battery welder is not taken into consideration at all, and the features of both welders can be utilized. Not.

  That is, if the battery welder is used too much, welding will not last long and the life of the battery will be shortened. Conversely, if the engine welder is used excessively, the meaning of installing the battery will be lost.

  The present invention has been made in consideration of the above-described points, and an object thereof is to provide a battery combined engine-driven welding machine that can be operated in combination while drawing out the advantages of both the engine welding machine and the battery welding machine. .

In order to achieve the above object, in the present invention,
An engine welder and a battery welder are provided. The engine welder and the battery welder each have independent control devices, and each of the control devices can perform two current adjustments simultaneously by a single operation. Battery-powered engine-driven welding machines connected to the machine separately,
The current regulator for the engine welder has a characteristic of increasing in a range below a predetermined output current value and maintaining the predetermined value thereafter.
The battery-adjustable engine-driven welding machine, characterized in that the current regulator for the battery welder does not increase within the range of the predetermined output current value or less and then increases.
Is to provide.

  Since the present invention adjusts the outputs of the engine welder and the battery welder by simultaneously adjusting the two current regulators by a single operation as described above, the two current regulators are set once. Then, the output of both welders can be adjusted with a single operation. In addition, the current regulator for the engine welder has a characteristic of increasing in a range below the predetermined output current value and then maintaining the predetermined value, and the current regulator for the battery welder is in a range below the predetermined output current value. In this case, ideal current sharing can be realized by configuring the two current regulators set so as to have characteristics that do not increase and then increase in a double configuration.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIGS. 1A and 1B are explanatory views showing the configuration of an embodiment of the present invention and an external view of a dial of a current regulator used in the embodiment.

  As shown in FIG. 1 (a), the welding machine G driven by the engine E has two outputs. One of them is supplied as a DC welding output to the welding output terminal 10 via the control rectifier 11 and the DC reactor 12. The control rectifier 11 is controlled by the engine welder control device 13, and outputs an output corresponding to the set value of the current regulator 14 from the control rectifier 11. The current regulator 14 is linked to a current regulator 35 of a battery welder described later. The other output is supplied as an AC output to the AC auxiliary power terminal 20 via the inverter 21 and the breaker 22.

  In this embodiment, the welding output from the battery B is supplied in addition to the output from the welding machine G. Then, as a countermeasure for charging battery B, AC auxiliary power output from inverter 21 and commercial power AC are used. The battery welder control device 34 controls the power supplied to the control rectifier 33 via the charging transformer 32 in accordance with these power supply conditions, that is, the state of the main power supply for charging based on the AC auxiliary power supply, the commercial power supply, and both. Charge battery B.

  Further, the battery welder control device 34 is provided with a current regulator 35, which controls the chopper 36 according to the set value of the current regulator 35, and contacts the contactor MC from the battery B via the DC reactor 37. The welding output is supplied to the welding output terminal 10 via The current regulator 35 is linked to the current regulator 14 described above.

  A relay Ry1 is connected to the output terminal of the inverter 21, and when the relay Ry1 is energized, the output of the inverter 21 is fed to the charging transformer 32 via the contact of the relay Ry1. When there is no AC auxiliary power supply and relay Ry1 is de-energized, the relay contact is connected to commercial power supply AC. If the commercial power supply AC is active at this time, the charging transformer 32 is supplied with power from the commercial power supply AC via the relay contact and the breaker 31. Then, a control power is supplied to the battery welding machine control device 34 by a relay Ry2 provided on the primary side of the charging transformer 32.

  When the control power is supplied to the battery welder control device 34, the contactor MC is closed, and the welding output is output from the battery B to the welding output terminal 10 via the chopper 36 and the DC reactor 37.

  When output from the battery B to the welding output terminal 10, there are cases where the AC auxiliary power source or the commercial power source AC is active and the battery B is charged, and there are cases where there is no power supply from both the power sources and the battery B is not charged.

  FIG. 1B shows the appearance of the dial scale of the current regulators 14 and 35 that are linked to each other shown in FIG. This dial scale is for setting a welding current range from 30A to 280A, and covers from the output current region of the small engine welder to the output current region of the large engine welder (30A-280A).

  2 (a), 2 (b) and 2 (c) are characteristic diagrams showing the relationship between the output current and the current regulator scale of the engine welder and battery welder in the embodiment shown in FIG.

  First, FIG. 2 (a) shows the relationship between the regulator scale of the engine welder and the output current. Here, it is assumed that the maximum output current of the engine welder is 130 A, and the region up to 130 A is a shared region of the engine welder. Therefore, from the minimum output current to the maximum output current of 130A, the engine welding machine is set so that the output current increases linearly with respect to the scale of the current regulator and no output exceeding 130A is generated.

  Next, FIG.2 (b) shows the relationship between the regulator scale of a battery welding machine, and output current. The battery welder shares an area exceeding the share area of the engine welder, and the output current increases linearly with respect to the scale of the current regulator from slightly above 130A. The reason why a constant output current, for example, 5 A, is allowed to flow from the minimum scale of the current regulators 14 and 35 to a little over 130 A is to increase the no-load voltage so that arc breakage is unlikely to occur.

  FIG. 2 (c) shows a hybrid characteristic obtained by synthesizing both characteristics of FIGS. 2 (a) and 2 (b) by a solid line. Each characteristic of FIGS. 2 (a) and 2 (b) is indicated by a broken line. Show. With this hybrid characteristic, the output current can be increased linearly from the minimum current scale to the maximum current of 280A through the current scales 14 and 35 through the intermediate scale 130A.

  As a result, as a battery combined use engine-driven welding machine, the output of the engine welding machine is constantly used from the small current region to the large current region obtained by combining the output of the engine welding machine and the output of the battery welding machine, The output of the battery welder can be additionally used as needed.

  The advantage of the battery-driven engine-driven welding machine is that a large output can be obtained despite its small size and light weight. Portable engine welders are broadly divided into 300A class diesel engine machines and 150A class gasoline engine machines. The engine-driven welding machine with a battery is a small gasoline engine machine, but with the help of the battery, it is large. The ability of a diesel engine can be demonstrated.

FIG. 1A is an explanatory diagram showing the configuration of an embodiment of the present invention, and FIG. 1B is an explanatory diagram showing a dial scale of the current regulator. FIG. 2 (a) is a characteristic diagram showing the regulator scale-output current characteristics of the battery-coupled engine-driven welder shown in FIG. 1, and FIG. 2 (b) is a characteristic diagram showing the characteristics of the battery welder. FIG. 2 (c) is a characteristic diagram showing a hybrid characteristic obtained by synthesizing both characteristics of FIGS. 2 (a) and 2 (b).

Explanation of symbols

E engine, G welder, AC commercial power, Ry relay.
10 welding output terminal, 11 inverter, 12 DC reactor,
13 engine welder control device, 20 AC auxiliary power terminal, 21 inverter,
22 breaker, 31 breaker, 32 charge transformer, 33 control rectifier,
34 battery welding machine control device, 35 current regulator, 36 chopper,
37 DC reactor.

Claims (2)

An engine welder and a battery welder are provided. The engine welder and the battery welder each have independent control devices, and each of the control devices can perform two current adjustments simultaneously by a single operation. Battery-powered engine-driven welding machines connected to the machine separately,
The current regulator for the engine welder has a characteristic of increasing in a range below a predetermined output current value and maintaining the predetermined value thereafter.
The battery-adjustable engine-driven welder is characterized in that the current adjuster for the battery welder does not increase in a range equal to or less than the predetermined output current value but increases thereafter. In the battery combined use engine drive welding machine according to claim 1 ,
The battery-adjustable engine-driven welding machine, wherein the current regulator for the battery welder has a characteristic of flowing a small current value necessary for preventing arc breakage in a range equal to or less than the predetermined current value.

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