CN201720581U

CN201720581U - Start-stop electricity-saving device of electric welder

Info

Publication number: CN201720581U
Application number: CN2010200377077U
Authority: CN
Inventors: 吴永生
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-14
Filing date: 2010-01-14
Publication date: 2011-01-26
Anticipated expiration: 2020-01-14

Abstract

The utility model relates to a start/stop electricity-saving device of an electric welder, which can effectively solve the problems of saving energy and prolonging the service life of the electric welder. The technical scheme for solving the problems is as follows: a current detecting and controlling circuit mainly comprises a current transformer L, a diode D1, a voltage-stabilizing diode VS and a capacitor C3; and a start/stop electricity-saving control circuit mainly comprises a resistor R, a triode BG, a diode D2, a relay J and an alternate current contactor QC. After a knife switch K is conducted, the alternate current of 380V voltage (220V voltage) is acted on the capacitor C1 and the transformer B of the electric welder; two ends of a primary winding are provided with only a dozen of alternate current voltages; no induction current is generated in the transformer L; and simultaneously the secondary alternate current voltage 12V of a control transformer B1 is rectified by a rectifier bridge pile UR, is stabilized by a filter voltage-stabilizing block of the filter capacitor C2 and is supplied to the control circuit so that the whole machine is arranged in a standby state.

Description

Electric welding machine automatic start-stop battery saving arrangement

Technical field

The utility model relates to a kind of power-saving technique, is a kind of power economizer for electric welder specifically.

Background technology

Electric welding machine economize on electricity emphasis is unloaded economize on electricity, and do not do work during because of zero load exciting current and the heating of electric welding machine own will consume more electric energy, and idle time is long more, and the waste electric energy is just many more.The present electric welding machine that generally uses, no matter be that AC welding set or DC welder all belong to the zero load type of not economizing on electricity, and this part old-fashioned electric welding machine, because cost is low, durability is good, so adopted by vast industrial enterprise, quantity is a lot, and the electric energy of waste is very big, and this is the old problem of the individual fine solution of failing for a long time.Occurred the electric welding machine with the high technology content of electronic circuit control in recent years, its power savings is good, but working environment is required height, needs periodic maintenance, and cost is too high, and general factories and miness adverse circumstances are not too suitable, are difficult to generally promote the use of.

The utility model content

L, diode D1, Zener diode VS, capacitor C3 forms, and start and stop economize on electricity control circuit mainly is made up of resistance R, triode BG, diode D2, relay J and A.C. contactor QC; It is characterized in that: the T1 point, the T2 point respectively with circuit in corresponding points join, after connecting knife switch K, interchange 380V voltage (220V voltage) is added in by capacitor C 1 and the elementary coiling group of electric welder transformer B two ends only the about 3V induced voltage of generation among tens volts of current transformer L, this induced voltage is through diode D1 rectification, the step-down of resistance R current limliting is after bidirectional triode thyristor provides trigger voltage, at this moment, the bidirectional triode thyristor triggering and conducting, with capacitor C 1 short circuit, electric welding machine plays arc welding, after the electric welding machine starting the arc, transformer L induced-current increases, voltage increases makes Zener diode VS puncture conducting, and capacitor C 3 chargings and capacitor C3 can select 100uF～3000uF as required.When replacing welding rod, calibration of workpieces or other reasons needed the short time to stop welding, capacitor C3 discharged to the bidirectional triode thyristor gate pole by Zener diode VS and resistor R, makes the bidirectional triode thyristor conducting.Welding machine normally moves, and described Zener diode VS selects 2CW12 silicon type Zener diode for use.When capacitor C3 discharges into below the 0.6V, bidirectional triode thyristor triggerless voltage cut-off, electric welding machine enters the economize on electricity holding state again, and the capability value that changes capacitor C3 just can change the time of bidirectional triode thyristor time-delay conducting, repeat said process when welding once more, go round and begin again.The utility model has thoroughly solved the problem of electric welder no-load power consumption, the also corresponding working time that reduces electric welding machine, improved the service life of electric welding machine, can save the bigger energy for country, add that this apparatus cost is cheap, simple in structure, easy and simple to handle, advantages such as easy production necessarily have good market prospects and economic benefit.

Description of drawings

Fig. 1 is an electrical equipment control schematic diagram of the present utility model.

Fig. 2 is a bidirectional triode thyristor schematic diagram of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described: electric welding machine automatic start-stop battery saving arrangement, current detection control circuit is mainly by current transformer L, diode D1, Zener diode VS in the circuit, capacitor C3 forms, and start and stop economize on electricity control circuit mainly is made up of resistance R, triode BG, diode D2, relay J and A.C. contactor QC; It is characterized in that: after connecting knife switch K, interchange 380V voltage (220V voltage) is added in by capacitor C 1 and the elementary coiling group of electric welder transformer B two ends only tens volts of alternating voltages, the influence electricity miscarriage is given birth among the transformer L, meanwhile, B1 level of control transformer alternating voltage 12V is through rectifier bridge heap UR rectification, to the control circuit power supply, complete machine is in holding state after the filtering voltage regulation piece voltage stabilizing of filter capacitor C2.

B time level produces short circuit current, produce about 3V induced voltage among the transformer L, this induced voltage provides bias current for after the step-down of resistance R current limliting triode BG through diode D1 rectification, cause the adhesive of triode BG turn-on relay, A.C. contactor gets electric adhesive, and with capacitor C 1 short circuit, electric welding machine plays arc welding, transformer L induced-current increases after the electric welding machine starting the arc, voltage increases makes Zener diode VS puncture conducting, and capacitor C3 charging and capacitor C3 can select 100uF～3000uF as required.When replacing welding rod, calibration of workpieces or other reasons need the short time to stop welding, capacitor C3 discharges to triode by Zener diode VS and resistance R, make relay J keep conducting adhesive A.C. contactor continue electric work, welding machine normally moves, and described Zener diode VS selects 2CW12 silicon type Zener diode for use.When capacitor C3 discharges into below the 0.6V, triode BG ends, and electric welding machine enters the economize on electricity holding state again, changes the capability value of capacitor C3, just can change the time of A.C. contactor time-delay conducting, and the repetition said process goes round and begins again when welding once more.When A.C. contactor QC uses bidirectional triode thyristor instead, current detection control circuit is made up of current transformer L, diode D1, Zener diode VS, capacitor C 3, start and stop economize on electricity control circuit mainly is made up of resistance R and bidirectional triode thyristor, after connecting plug-in strip K, exchanging 380V voltage (220V voltage) is added in by capacitor C 1 and the first polar curve group two ends of electric welder transformer B, tens volts of alternating voltages are only arranged, and the influence electricity miscarriage is given birth among the transformer L, and complete machine is in holding state.

During welding, welding rod contacts with workpiece, B level of electric welder transformer produces short circuit, produce about 3V induced voltage among the electric current mutual inductance L, this induced voltage is through diode D1 rectification, and the step-down of resistance R current limliting is after bidirectional triode thyristor provides trigger voltage, at this moment, the bidirectional triode thyristor triggering and conducting, with capacitor C 1 short circuit, the machine initial arc welding.After the electric welding machine starting the arc, transformer L induced-current increases, and voltage increases makes Zener diode VS puncture conducting, and capacitor C 3 chargings and capacitor C 3 can be selected 100UF～3000UF as required.Change welding rod, when school pendulum workpiece or other reasons needed the short time to stop welding, capacitor C3 discharged to the controllable silicon gate pole by Zener diode and resistor R,, impel bidirectional triode thyristor to keep conducting.Welding machine normally moves.Described Zener diode VS selects 2CW12 silicon type Zener diode for use.When capacitor C3 discharges into below the 0.6V, bidirectional triode thyristor triggerless voltage cut-off, the two holding states that enter of electric welding machine, the capability value that changes capacitor C3 just can change the time of bidirectional triode thyristor time-delay conducting, and the repetition said process goes round and begins again when welding once more.

When A.C. contactor QC uses bidirectional triode thyristor instead, A point, B point in the circuit are taken apart, the A point directly is connected to the controllable silicon gate pole, T1 point, T2 point respectively with circuit in corresponding points join, the rectification output negative pole be capacitor C 3 negative poles with capacitor C 1 to being connected in series the withstand voltage diode of current/voltage more than 2 times that is higher than between the welding machine input C point, between diode cathode and the C point, positive pole then joins with capacitor C 3 negative poles, dotted portion circuit among the figure, this moment also can be with the elementary disconnection of control transformer in order to reach power saving more.

Claims

1. electric welding machine automatic start-stop battery saving arrangement, it mainly is made up of: current detection control circuit and start and stop economize on electricity control circuit, it is characterized in that: current detection control circuit is mainly by current transformer L, diode D1, Zener diode VS, capacitor C3 forms, current transformer L is a straight-through current transformer, wherein be installed with any of electric welding machine output line, current transformer one end and rectification output negative pole link, other end output then links with diode D1 positive pole, export through negative pole, capacitor C3 negative pole and rectification output negative pole link, anodal and Zener diode VS positive pole links, and the output of Zener diode negative pole then is associated with in the circuit with diode D1 negative pole; The control circuit of described electric welding machine automatic start-stop battery saving arrangement mainly is made up of resistance R, triode BG, diode D2, relay J and A.C. contactor QC; Wherein resistance R one end is associated with diode D1 negative pole and Zener diode VS negative pole, the other end then joins with transistor base, transistor emitter is connected to the rectification output negative pole, colelctor electrode output and rectification output cathode SRE J, the D2 negative pole is connected to the rectification output cathode, positive pole and transistor collector, relay J one end is connected in the circuit mutually, relay J normally opened contact one is terminated at any phase of power input, another contact then is connected to A.C. contactor control coil one end, another joins the A.C. contactor control coil other end with power supply, when A.C. contactor QC uses bidirectional triode thyristor instead, with A point in the circuit, the B point is taken apart, the A point directly is connected to the controllable silicon gate pole, the T1 point, the T2 point respectively with circuit in corresponding points join, the rectification output negative pole be capacitor C 3 negative poles with capacitor C 1 to being connected in series the withstand voltage diode D of current/voltage more than 2 times that is higher than between the welding machine input C point, diode cathode and C point join, positive pole then joins with capacitor C 3 negative poles, dotted portion circuit among the figure, this moment also can be with the elementary disconnection of control transformer in order to reach power saving more.

2. electric welding machine automatic start-stop battery saving arrangement according to claim 1 is characterized in that: described current transformer L selects straight-through current transformer for use.

3. electric welding machine automatic start-stop battery saving arrangement according to claim 1 is characterized in that: described A.C. contactor QC is a relation in parallel with capacitor C 1.