CN2357874Y

CN2357874Y - Fase energy-saving controller for A. C. electric welding machine

Info

Publication number: CN2357874Y
Application number: CN 98241905
Authority: CN
Inventors: 徐云亭; 罗青年
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-10-28
Filing date: 1998-10-28
Publication date: 2000-01-12
Anticipated expiration: 2008-10-28

Abstract

The utility model relates to a safe energy-saving controller for an AC electric welding machine. The safe energy-saving controller for an AC electric welding machine is provided with a box body of an AC input terminal. An electricity leakage protection air switch, a fuse and an output terminal are installed on the inner side of a panel of the box body. An AC contactor, a transducing transformer, a time relay and a control circuit board are installed in the box body. When the welding machine is in zero load, the transducing transformer of the controller provides a power supply. A control circuit is started by a current changing signal to shut the transducing transformer when the welding machine is strikes arcs, so that an AC power supply is directly provided to the welding machine. The utility model has the advantages of obvious reduction of the zero load power consumption of the AC welder, bovious reduction of zero load output voltage and high safety performance.

Description

The A.C. welder safe energy-saving controller

The utility model belongs to control device, particularly relates to a kind of A.C. welder safe energy-saving controller.

A kind of arc welder that the A.C. welder amount of being to use is bigger shows that according to interrelated data only BX1,2, the online use amount of 3 serial AC welding sets are about 3,700,000, and this class welding machine all is a manual welding, and majority is worked than under the harsh conditions at environment.Above-mentioned welding machine exists tangible deficiency to be, its unloaded output voltage reaches and exchanges more than the 70V, is higher than 50V trouble free service voltage.Therefore, exist the hidden danger that jeopardizes personal safety, the secondary injury of especially being shocked by electricity and causing, as accident such as get injured by a fall, injure by a crashing object and happen occasionally.In addition, above-mentioned welding machine no-load power consumption is higher.

The purpose of this utility model is intended to disclose that a kind of to reduce the unloaded output voltage of A.C. welder be in the safety value scope and obviously reduce the A.C. welder safe energy-saving controller of no-load power consumption.

Above-mentioned purpose is achieved through the following technical solutions: the controller box 1 that is provided with the three-phase alternating current input terminal, earth leakage protective air switch QF is equipped with in its panel inboard with lock, fuse 1,2RF and lead-out terminal A, B, transducing transformer BK is housed in the casing, A.C. contactor KM, time relay KT and control circuit board, the controlled contact QF-1 that connects the earth leakage protective air beginning of AC input terminal meets lead-out terminal A, and connect elementary end of transducing transformer BK and A.C. contactor KM winding one end respectively, and diode bridge one input of control circuit through fuse 2RF; Another controlled contact QF-3 meets lead-out terminal B through the normally open contact of A.C. contactor KM parallel connection, and connect the elementary other end of transducing transformer BK respectively and connect the A.C. contactor KM winding other end, and connect another input of diode bridge through time relay KT winding through time relay KT normally open contact through fuse 1RF; BK level of transducing transformer two ends meet lead-out terminal A and B through the auxiliary normally closed interlock of A.C. contactor KM respectively; Lead-out terminal B is installed with current coil LT to the line that exchanges contactor KM normally open contact in parallel and auxiliary normally closed interlock, its two ends also meet potentiometer W, and the adjustable contact of potentiometer W and an end are connected control electrode and the main electrode T of bidirectional triode thyristor KS respectively ₂, be parallel with double limiting diode series arm and anti-interference resistance R between the two ends ₁, capacitor C ₁, bidirectional triode thyristor KS main electrode T ₁, T ₂Connect diode bridge two outputs respectively.

Said controller box 1 is provided with the flat chamber door of opening 2 in its panels outside, and the top is provided with rain cover 3;

Between said lead-out terminal A and the terminal B, be connected to the A.C. voltmeter TV that is located on the cabinet panel;

Said lead-out terminal B is connected to coil La, Lb that the number of turn that is coupled with current coil is 1 circle, 30 circles respectively to the line that exchanges contactor KM normally open contact in parallel and auxiliary normally closed interlock.

Description of drawings:

Fig. 1 the utility model example structure schematic diagram

Fig. 2 embodiment electrical schematic diagram

Among the figure: 1 casing, 2 chamber doors, 3 rain covers, 4 voltmeters, 5 fuses and lead-out terminal, 6 earth leakage protective air switches, 7 locks.

Below in conjunction with drawings and Examples explanation the utility model.

Embodiment as shown in Figure 1; controller box 1 rear portion is provided with AC input terminal; with lock 7 panel inboard is fixed with earth leakage protective air switch 6, fuse and lead-out terminal; A.C. voltmeter 4 is housed on the panel; the flat door 2 of unpacking is housed on the casing of panel front side; the casing top is provided with rain cover 3, and the rainproof and security performance of this casing is greatly improved, and particularly suitable field condition operation is used.When using this controller, have only the professional to unblank to connect output cable, help device security and integrity to exchanging electric welding machine.

The utility model circuit connecting relation is narrated operation principle illustrated in conjunction with Fig. 2; open earth leakage protective air switch QF; transducing transformer BK secondary voltage assists normally-closed contact to lead-out terminal A and terminal B through A.C. contactor KM; at this moment; A.C. welder output voltage in the accompanying drawing 2 in the frame of broken lines is only for exchanging 10 volts; and elementary no-load current also greatly reduces, and actual measurement comparison energy-saving effect can reach about 95%.When the soldering turret striking is welded, welding machine is elementary to be that transducing transformer BK secondary current changes, the current coil LT induced-current of terminal B to the transducing transformer BK lead-in wire produces voltage at potentiometer W two ends, through adjusting and diode D1-8 amplitude limit, make bidirectional triode thyristor KS conducting, each brachium pontis alternate conduction of electric bridge that diode D9-12 forms, time relay KT gets electric adhesive, its normally opened contact engages, A.C. contactor KM is got, its normally open contact in parallel engages and makes interchange 380V directly be added to lead-out terminal A, B, the welding machine operate as normal.Simultaneously, each auxiliary normally closed interlock disjunction of A.C. contactor KM, BK level of transformer disconnects.Interrupted zero load in the welding process makes terminal B change to exchanging contactor KM line electric current, keeps the bidirectional triode thyristor conducting through current coil LT.The time-delay disjunction of time relay KT contact, A.C. contactor KM stablizes adhesive in the time of can guaranteeing interrupted unloaded in the setting-up time scope in the welding process.If interrupting time surpasses setting-up time or ends welding, then bidirectional triode thyristor KS ends, the diode bridge disjunction, time relay KT disjunction, then A.C. contactor KM disjunction, BK level of transducing transformer connected lead-out terminal A, B, makes A.C. welder be in the energy-saving safety state.

For monitoring this controller working condition, panel is equipped with the A.C. voltmeter that is connected between lead-out terminal A and the B.Each lead-in wire in the present embodiment among the current coil LT is actual to be replaced by coil La, Lb, and La gets 1 circle, and Lb gets 30 circles, its objective is that to make conversion and control reliable.

The beneficial effects of the utility model are: can significantly reduce A.C. welder no-load power consumption and soldering turret And the floating voltage between the ground wire, the accident that effectively prevents from getting an electric shock and therefore cause also can have simultaneously Effect prevents the electrical fire that welding machine electric leakage and input and output shorted to earth cause.

Claims

1, the A.C. welder safe energy-saving controller, it is characterized in that: the controller box that is provided with the three-phase alternating current input terminal, earth leakage protective air switch QF, fuse and lead-out terminal A, B are equipped with in its panel inboard, transducing transformer BK is housed in the casing, A.C. contactor KM, time relay KT and control circuit board, the controlled contact QF-1 that connects the earth leakage protective air switch of AC input terminal meets lead-out terminal A, and connect an elementary end and A.C. contactor KM winding one end of transducing transformer BK respectively, and diode electric bridge one input of control circuit through fuse; Another controlled contact QF-3 meets lead-out terminal B through the normally open contact of A.C. contactor KM parallel connection, and connect the elementary other end of transducing transformer BK respectively and connect the A.C. contactor KM winding other end through time relay KT normally open contact through fuse 1RF, and connecing another input of diode electric bridge through time relay KT winding, BK level of transducing transformer two ends meet lead-out terminal A and terminal B through the auxiliary normally closed interlock of A.C. contactor KM respectively; Lead-out terminal B is installed with current coil LT to the line that exchanges contactor KM normally open contact in parallel and auxiliary normally closed interlock, its two ends also meet potentiometer W, the adjustable contact of potentiometer W and an end are connected control electrode and the main electrode T2 of bidirectional triode thyristor KS respectively, be parallel with double limiting diode series arm and anti-interference resistance R 1, capacitor C 1 between the two ends, bidirectional triode thyristor KS main electrode T1, T2 connect diode bridge two outputs respectively.

2, safe energy-saving controller as claimed in claim 1 is characterized in that: said controller box, be provided with the flat chamber door of opening in its panels outside, and the top is provided with rain cover.

3, safe energy-saving controller as claimed in claim 1 is characterized in that: be connected to the A.C. voltmeter that is located on the cabinet panel between said lead-out terminal A and the terminal B.

4, safe energy-saving controller as claimed in claim 1, it is characterized in that: said lead-out terminal B is connected to coil La and Lb that the number of turn that is coupled with current coil LT is 1 circle, 30 circles respectively to the line that exchanges contactor KM normally open contact in parallel and auxiliary normally closed interlock.