CN109434250B - No-load energy-saving device of direct current welder - Google Patents
No-load energy-saving device of direct current welder Download PDFInfo
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- CN109434250B CN109434250B CN201811498977.5A CN201811498977A CN109434250B CN 109434250 B CN109434250 B CN 109434250B CN 201811498977 A CN201811498977 A CN 201811498977A CN 109434250 B CN109434250 B CN 109434250B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention relates to a safe energy-saving technology of an electric welding machine, in particular to a no-load energy-saving device of a direct current electric welding machine, which comprises an electric welding machine T1, a circuit to be welded and a welding control circuit, wherein a power supply reduces the output voltage of the electric welding machine to be safe low voltage through a capacitor of the circuit to be welded, the welding control circuit enables a main contact KM1-1 of an alternating current contactor of the circuit to be welded to be closed, and the electric welding machine is electrified to perform welding. In the intermittent period of welding, three input ends of a power supply of the direct current electric welder are respectively and automatically connected in series with a capacitor, so that the secondary voltage of the direct current electric welder is greatly reduced, the safety protection function is achieved, and the electric welder is greatly saved in electric energy.
Description
Technical Field
The invention relates to a safe energy-saving technology of an electric welding machine, in particular to a no-load energy-saving device of a direct current electric welding machine.
Background
Ac/dc electric welding machine is an indispensable welding tool in machinery manufacturing factories, equipment maintenance units, construction sites, and the like. The electric welding machine generally works intermittently, and consumes a large amount of electric energy during welding, but during the intermittent period when the electric welding machine stops welding, the power consumption is generally hundreds of watts, and particularly, when workers leave work, sometimes forget to turn off a power switch, the electric welding machine always runs in an idle state, so that the electric energy is wasted, the power factor of a power grid is reduced, and even personal electric shock accidents are caused.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides an idle energy-saving device of a direct current welding machine, which can automatically connect a capacitor in series with the primary of the direct current welding machine in the intermittent period of the welding machine, so that the secondary is only a few volts or tens of volts, thereby being safe and greatly saving electric energy.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the no-load energy-saving device of the direct-current welding machine comprises a welding machine T1, a circuit to be welded and a welding control circuit, wherein the power supply reduces the output voltage of the welding machine to be safe low voltage through a capacitor of the circuit to be welded, and the welding control circuit enables a main contact KM1-1 of an alternating-current contactor of the circuit to be welded to be closed, so that the welding machine is electrified to perform welding.
The circuit to be welded comprises a main circuit to be welded and a control circuit to be welded, wherein the main circuit to be welded is connected with the input end of the electric welding machine T1 through a capacitor and a main contact KM1-1 of an alternating current contactor which are connected in parallel, the output end of the electric welding machine T1 is connected with a welding handle and a weldment through a three-phase full-wave rectifier bridge, and the control circuit to be welded enables the main contact KM1-1 of the alternating current contactor of the circuit to be welded to be disconnected, so that the output voltage of the electric welding machine T1 is reduced into safe low voltage through the capacitor.
The main circuit to be welded comprises a three-pole single-throw switch Q1, a main contact KM1-1 of an alternating current contactor, a capacitor C1, a capacitor C2, a capacitor C3 and a three-phase full-wave rectifier bridge.
Three movable contacts of the three-pole single-throw switch Q1 are respectively connected with a power bus L1, a power bus L2 and a power bus L3; the first stationary contact of the three-pole single-throw switch Q1 is connected with the first input end of the electric welding machine T1 through the main contact KM1-1 of the first alternating-current contactor, and the capacitor C1 is connected with the main contact KM1-1 of the first alternating-current contactor in parallel; the first output terminal of the welding machine T1 is connected between the cathode of the diode VD3 and the anode of the diode VD6 of the three-phase full-wave rectifier bridge.
The second stationary contact of the three-pole single-throw switch Q1 is connected with the second input end of the electric welding machine T1 through the main contact KM1-1 of the second alternating-current contactor, and the capacitor C2 is connected with the main contact KM1-1 of the second alternating-current contactor in parallel; the second output terminal of the welding machine T1 is connected between the cathode of the diode VD2 and the anode of the diode VD5 of the three-phase full-wave rectifier bridge.
The third stationary contact of the three-pole single-throw switch Q1 is connected with the third input end of the electric welding machine T1 through the main contact KM1-1 of the third alternating-current contactor, and the capacitor C3 is connected with the main contact KM1-1 of the third alternating-current contactor in parallel; the third output end of the electric welding machine T1 passes through a current transformer TA1 of the welding control circuit and is connected between the cathode of a diode VD1 and the anode of a diode VD4 of the three-phase full-wave rectifier bridge.
The cathode of the diode VD1, the cathode of the diode VD2 and the cathode of the diode VD3 are all connected with welding; the anode of the diode VD4, the anode of the diode VD5 and the anode of the diode VD6 are all connected with the welding handle.
The to-be-welded control circuit comprises a transformer T2, a coil KM1 of an alternating-current contactor, a coil KT1 of a time relay, a time-delay break normally-closed contact KT1-1 of the time relay, a normally-closed contact K1-1 of the relay and a switch S1.
The fixed contact of the time relay delay normally closed contact KT1-1 is connected with the second fixed contact of the three-pole single-throw switch Q1, the movable contact of the time relay delay normally closed contact KT1-1 is connected in series with the coil KM1 of the alternating current contactor, and the coil KM1 of the alternating current contactor is connected with the third fixed contact of the three-pole single-throw switch Q1.
The static contact of the normally closed contact K1-1 of the relay is connected with the second static contact of the three-pole single-throw switch Q1, the movable contact of the normally closed contact K1-1 of the relay is connected with the coil KT1 of the time relay in series, the coil KT1 of the time relay is connected with the primary coil of the transformer T2, and the primary coil of the transformer T2 is connected with the third static contact of the three-pole single-throw switch Q1 through the switch S1.
The welding control circuit comprises a current transformer TA1, a diode VD11, a resistor R1, a voltage stabilizing tube VW1, a resistor R2, a resistor R3, a capacitor C4, a capacitor C5, a triode VT1, a diode VD12, a coil K1 of a relay and a rectifier bridge.
One end of the current transformer TA1 is connected with the positive electrode of the diode VD11, and the negative electrode of the diode VD11 is sequentially connected with the resistor R1, the resistor R2, the resistor R3 and the capacitor C5 in series; the capacitor C5 is connected between the cathode of the diode VD9 and the cathode of the diode VD10 of the rectifier bridge.
The negative electrode of the voltage stabilizing tube VW1 is connected between the resistor R1 and the resistor R2, and the positive electrode of the voltage stabilizing tube VW1 is connected with the other end of the current transformer TA 1; the other end of the current transformer TA1 is also respectively connected with an emitter of the triode VT1, a cathode of the capacitor C4, an anode of the diode VD8 and an anode of the diode VD 7; the positive electrode of the capacitor C4 is connected between the negative electrode of the diode VD9 and the negative electrode of the diode VD 10.
The base electrode of the triode VT1 is connected between the resistor R2 and the resistor R3, and the collector electrode of the triode VT1 is connected in series with the coil K1 of the relay and then is connected between the cathode of the diode VD9 and the cathode of the diode VD 10; the diode VD12 is connected in parallel with the coil K1 of the relay and the anode of the diode VD12 is connected with the collector of the transistor VT 1.
One end of a secondary coil of the transformer T2 is connected between the cathode of the diode VD7 and the anode of the diode VD 9; the other end of the secondary winding of the transformer T2 is connected between the cathode of the diode VD8 and the anode of the diode VD 10.
The invention has the advantages that the three input ends of the direct current electric welder are respectively and automatically connected in series with the capacitor in the intermittent period of welding, so that the secondary voltage of the direct current electric welder is greatly reduced, the safety protection effect is realized, and the electric welder is greatly saved in electric energy.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
The no-load energy-saving device of the direct-current welding machine comprises a welding machine T1, a circuit to be welded and a welding control circuit, wherein the power supply reduces the output voltage of the welding machine to be safe low voltage through a capacitor of the circuit to be welded, and the welding control circuit enables a main contact KM1-1 of an alternating-current contactor of the circuit to be welded to be closed, so that the welding machine is electrified to perform welding.
Specifically, the circuit to be welded includes a main circuit to be welded and a control circuit to be welded, the main circuit to be welded is connected with the input end of the electric welding machine T1 through a capacitor and a main contact KM1-1 of an alternating current contactor which are connected in parallel, the output end of the electric welding machine T1 is connected with a welding handle and a weldment through a three-phase full-wave rectifier bridge, and the control circuit to be welded enables the main contact KM1-1 of the alternating current contactor of the circuit to be welded to be disconnected, so that the output voltage of the electric welding machine T1 is reduced to be safe low voltage through the capacitor.
The main circuit to be welded, as shown in fig. 1, comprises a three-pole single-throw switch Q1, a main contact KM1-1 of an alternating current contactor, a capacitor C1, a capacitor C2, a capacitor C3 and a three-phase full-wave rectifier bridge.
Three movable contacts of the three-pole single-throw switch Q1 are respectively connected with a power bus L1, a power bus L2 and a power bus L3; the first stationary contact of the three-pole single-throw switch Q1 is connected with the first input end of the electric welding machine T1 through the main contact KM1-1 of the first alternating-current contactor, and the capacitor C1 is connected with the main contact KM1-1 of the first alternating-current contactor in parallel; the first output terminal of the welding machine T1 is connected between the cathode of the diode VD3 and the anode of the diode VD6 of the three-phase full-wave rectifier bridge.
The second stationary contact of the three-pole single-throw switch Q1 is connected with the second input end of the electric welding machine T1 through the main contact KM1-1 of the second alternating-current contactor, and the capacitor C2 is connected with the main contact KM1-1 of the second alternating-current contactor in parallel; the second output terminal of the welding machine T1 is connected between the cathode of the diode VD2 and the anode of the diode VD5 of the three-phase full-wave rectifier bridge.
The third stationary contact of the three-pole single-throw switch Q1 is connected with the third input end of the electric welding machine T1 through the main contact KM1-1 of the third alternating-current contactor, and the capacitor C3 is connected with the main contact KM1-1 of the third alternating-current contactor in parallel; the third output end of the electric welding machine T1 passes through a current transformer TA1 of the welding control circuit and is connected between the cathode of a diode VD1 and the anode of a diode VD4 of the three-phase full-wave rectifier bridge.
The cathode of the diode VD1, the cathode of the diode VD2 and the cathode of the diode VD3 are all connected with welding; the anode of the diode VD4, the anode of the diode VD5 and the anode of the diode VD6 are all connected with the welding handle.
The to-be-welded control circuit, as shown in fig. 1, comprises a transformer T2, a coil KM1 of an alternating-current contactor, a coil KT1 of a time relay, a time-delay break normally-closed contact KT1-1 of the time relay, a normally-closed contact K1-1 of the relay and a switch S1.
The fixed contact of the time relay delay normally closed contact KT1-1 is connected with the second fixed contact of the three-pole single-throw switch Q1, the movable contact of the time relay delay normally closed contact KT1-1 is connected in series with the coil KM1 of the alternating current contactor, and the coil KM1 of the alternating current contactor is connected with the third fixed contact of the three-pole single-throw switch Q1.
The static contact of the normally closed contact K1-1 of the relay is connected with the second static contact of the three-pole single-throw switch Q1, the movable contact of the normally closed contact K1-1 of the relay is connected with the coil KT1 of the time relay in series, the coil KT1 of the time relay is connected with the primary coil of the transformer T2, and the primary coil of the transformer T2 is connected with the third static contact of the three-pole single-throw switch Q1 through the switch S1.
The welding control circuit, as shown in fig. 1, comprises a current transformer TA1, a diode VD11, a resistor R1, a voltage stabilizing tube VW1, a resistor R2, a resistor R3, a capacitor C4, a capacitor C5, a triode VT1, a diode VD12, a coil K1 of a relay and a rectifier bridge.
One end of the current transformer TA1 is connected with the positive electrode of the diode VD11, and the negative electrode of the diode VD11 is sequentially connected with the resistor R1, the resistor R2, the resistor R3 and the capacitor C5 in series; the capacitor C5 is connected between the cathode of the diode VD9 and the cathode of the diode VD10 of the rectifier bridge.
The negative electrode of the voltage stabilizing tube VW1 is connected between the resistor R1 and the resistor R2, and the positive electrode of the voltage stabilizing tube VW1 is connected with the other end of the current transformer TA 1; the other end of the current transformer TA1 is also respectively connected with an emitter of the triode VT1, a cathode of the capacitor C4, an anode of the diode VD8 and an anode of the diode VD 7; the positive electrode of the capacitor C4 is connected between the negative electrode of the diode VD9 and the negative electrode of the diode VD 10.
The base electrode of the triode VT1 is connected between the resistor R2 and the resistor R3, and the collector electrode of the triode VT1 is connected in series with the coil K1 of the relay and then is connected between the cathode of the diode VD9 and the cathode of the diode VD 10; the diode VD12 is connected in parallel with the coil K1 of the relay and the anode of the diode VD12 is connected with the collector of the transistor VT 1.
One end of a secondary coil of the transformer T2 is connected between the cathode of the diode VD7 and the anode of the diode VD 9; the other end of the secondary winding of the transformer T2 is connected between the cathode of the diode VD8 and the anode of the diode VD 10.
The working principle is as follows:
the capacitors C1, C2 and C3 are respectively connected with the three main contacts KM1-1 of the alternating current contactor in parallel and then connected with the three windings of the primary of the direct current welder T1 in series.
When the three-pole single-throw switch Q1 and the switch S1 are closed, the coil KM1 of the alternating-current contactor is electrified to enable the direct-current electric welding machine to be electrified temporarily, meanwhile, the coil KT1 of the time relay is electrified and attracted, the normally-closed contact KT1-1 is disconnected after the time delay is about 10 seconds, the coil of the KM1 of the alternating-current contactor is in power failure, the three main contacts KM1-1 are disconnected, three input ends of the electric welding machine T1 are connected with L1, L2 and L3 of a three-phase power supply through capacitors C1, C2 and C3 and the three-pole single-throw switch Q1 respectively, and the direct-current electric welding machine T1 is in a micro-power consumption state to be welded.
Three-phase alternating currents L1, L2 and L3 are respectively applied to three primary input ends of a direct-current welding machine T1 through three-pole single-throw switches Q1 and capacitors C1, C2 and C3, and a weak potential is generated through secondary induction of the welding machine T1.
When the direct current electric welding machine T1 works, a voltage signal of a few volts is output at the primary side of the current transformer TA1, the signal is rectified by the diode VD11, the voltage is reduced by the resistor R1, the voltage of the voltage stabilizing tube VW1 is stabilized and then is changed into a direct current signal, the positive electrode is added to the base electrode of the triode VT1 through the current limiting resistor R2, the negative electrode of the current transformer TA1 is connected with the emitting electrode of the triode VT1, and then the triode VT1 is conducted. The coil K1 of the relay is electrified, the normally closed contact K1-1 is disconnected, the coil KT1 of the time relay is in power failure, the time-delay normally closed contact KT1-1 is closed, the coil KM1 of the contactor is electrified, the three main contacts KM1-1 are closed, the three capacitors C1, C2 and C3 are respectively short-circuited, and the direct current electric welder T1 works normally.
At this time, the secondary induced voltage of the current transformer TA1 is higher, so that the triode VT1 is in a conducting state, and the normal operation of the electric welding machine T1 is ensured.
When the welding rod needs to be replaced, welding parts are arranged or other reasons need to be suspended, the normally closed time-delay contact of KT1-1 is not disconnected as long as the suspension time is not more than 10 seconds, the welding can be continued, when the suspension time is more than 10 seconds, the normally closed time-delay contact KT1-1 is disconnected, so that the alternating current contactor coil KM1 is powered off, the three main contacts KM1-1 are disconnected, the three capacitors C1, C2 and C3 are connected in series with the input circuit of the electric welding machine T1, and the electric welding machine T1 is in a micro-power consumption to-be-welded state.
Therefore, only when the welding operation is performed, the direct current electric welding machine can normally conduct power-on operation, and once a welder stops welding, the input end of the direct current electric welding machine is automatically connected in series with the capacitor, so that the secondary output of the direct current electric welding machine is low in voltage, safety is achieved, and electric energy is saved.
The above embodiments are merely for the description of the present invention and are not intended to limit the present invention. It will be apparent to those skilled in the art that appropriate changes and modifications may be made without departing from the scope of the invention, and therefore all such equivalent arrangements are within the scope of the invention as defined in the appended claims.
Claims (2)
1. A DC welder no-load energy-saving device is characterized in that: the welding control circuit enables a main contact KM1-1 of an alternating current contactor of the circuit to be welded to be closed, and the electric welding machine is electrified to perform welding;
the to-be-welded circuit comprises a to-be-welded main circuit and a to-be-welded control circuit, wherein the to-be-welded main circuit is connected with the input end of the electric welding machine T1 through a capacitor and main contacts KM1-1 of alternating current contactors which are connected in parallel, the output end of the electric welding machine T1 is connected with a welding handle and a weldment through a three-phase full-wave rectifier bridge, the to-be-welded control circuit is connected between the main contacts KM1-1 of the two alternating current contactors of the to-be-welded main circuit, and the to-be-welded control circuit enables the main contacts KM1-1 of the alternating current contactors of the to-be-welded main circuit to be disconnected through a coil, so that the output voltage of the electric welding machine T1 is reduced to be safe low voltage through the capacitor;
the main circuit to be welded comprises a three-pole single-throw switch Q1, a main contact KM1-1 of an alternating current contactor, a capacitor C1, a capacitor C2, a capacitor C3 and a three-phase full-wave rectifier bridge;
three movable contacts of the three-pole single-throw switch Q1 are respectively connected with a power bus L1, a power bus L2 and a power bus L3; the first stationary contact of the three-pole single-throw switch Q1 is connected with the first input end of the electric welding machine T1 through the main contact KM1-1 of the first alternating-current contactor, and the capacitor C1 is connected with the main contact KM1-1 of the first alternating-current contactor in parallel; the first output end of the electric welding machine T1 is connected between the cathode of a diode VD3 and the anode of a diode VD6 of the three-phase full-wave rectifier bridge;
the second stationary contact of the three-pole single-throw switch Q1 is connected with the second input end of the electric welding machine T1 through the main contact KM1-1 of the second alternating-current contactor, and the capacitor C2 is connected with the main contact KM1-1 of the second alternating-current contactor in parallel; the second output end of the electric welding machine T1 is connected between the cathode of a diode VD2 and the anode of a diode VD5 of the three-phase full-wave rectifier bridge;
the third stationary contact of the three-pole single-throw switch Q1 is connected with the third input end of the electric welding machine T1 through the main contact KM1-1 of the third alternating-current contactor, and the capacitor C3 is connected with the main contact KM1-1 of the third alternating-current contactor in parallel; the third output end of the electric welding machine T1 passes through a current transformer TA1 of the welding control circuit and is connected between the cathode of a diode VD1 and the anode of a diode VD4 of the three-phase full-wave rectifier bridge;
the cathode of the diode VD1, the cathode of the diode VD2 and the cathode of the diode VD3 are all connected with welding; the anode of the diode VD4, the anode of the diode VD5 and the anode of the diode VD6 are all connected with the welding handle;
the to-be-welded control circuit comprises a transformer T2, a coil KM1 of an alternating-current contactor, a coil KT1 of a time relay, a time-delay break normally-closed contact KT1-1 of the time relay, a normally-closed contact K1-1 of the relay and a switch S1;
the fixed contact of the time relay delay normally closed contact KT1-1 is connected with the second fixed contact of the three-pole single-throw switch Q1, the movable contact of the time relay delay normally closed contact KT1-1 is connected in series with the coil KM1 of the alternating current contactor, and the coil KM1 of the alternating current contactor is connected with the third fixed contact of the three-pole single-throw switch Q1;
the static contact of the normally closed contact K1-1 of the relay is connected with the second static contact of the three-pole single-throw switch Q1, the movable contact of the normally closed contact K1-1 of the relay is connected with the coil KT1 of the time relay in series, the coil KT1 of the time relay is connected with the primary coil of the transformer T2, and the primary coil of the transformer T2 is connected with the third static contact of the three-pole single-throw switch Q1 through the switch S1.
2. The dc welder no-load energy saving device of claim 1, wherein: the welding control circuit comprises a current transformer TA1, a diode VD11, a resistor R1, a voltage stabilizing tube VW1, a resistor R2, a resistor R3, a capacitor C4, a capacitor C5, a triode VT1, a diode VD12, a coil K1 of a relay and a rectifier bridge;
one end of the current transformer TA1 is connected with the positive electrode of the diode VD11, and the negative electrode of the diode VD11 is sequentially connected with the resistor R1, the resistor R2, the resistor R3 and the capacitor C5 in series; the capacitor C5 is connected between the cathode of the diode VD9 and the cathode of the diode VD10 of the rectifier bridge;
the negative electrode of the voltage stabilizing tube VW1 is connected between the resistor R1 and the resistor R2, and the positive electrode of the voltage stabilizing tube VW1 is connected with the other end of the current transformer TA 1; the other end of the current transformer TA1 is also respectively connected with an emitter of the triode VT1, a cathode of the capacitor C4, an anode of the diode VD8 and an anode of the diode VD 7; the anode of the capacitor C4 is connected between the cathode of the diode VD9 and the cathode of the diode VD 10;
the base electrode of the triode VT1 is connected between the resistor R2 and the resistor R3, and the collector electrode of the triode VT1 is connected in series with the coil K1 of the relay and then is connected between the cathode of the diode VD9 and the cathode of the diode VD 10; the diode VD12 is connected with the coil K1 of the relay in parallel, and the anode of the diode VD12 is connected with the collector of the triode VT 1;
one end of a secondary coil of the transformer T2 is connected between the cathode of the diode VD7 and the anode of the diode VD 9; the other end of the secondary winding of the transformer T2 is connected between the cathode of the diode VD8 and the anode of the diode VD 10.
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| CN201811498977.5A CN109434250B (en) | 2018-12-08 | 2018-12-08 | No-load energy-saving device of direct current welder |
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| CN201811498977.5A CN109434250B (en) | 2018-12-08 | 2018-12-08 | No-load energy-saving device of direct current welder |
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