CN2195403Y - Energy-saving source for air plasma cutter - Google Patents

Abstract

The utility model relates to an energy-saving source for air plasma cutters, comprising a working source, an arc starting unit and a casing. The utility model is characterized in that the energy-saving source for air plasma cutters also has an arc assisting power and a control unit; during arc starting, the arc assisting source generates a high voltage to be connected to both ends of the work voltage in order to quickly start arcs; after arc starting, the work current passes through the control unit to control the disconnection of the output terminal of arc assisting source, a low work voltage is used to maintain the stable combustion of arcs; so, the capacitance of the transformer of a work source can be reduced, the loss of the oversize leakage reactance is avoided, 40-50% energy can be saved as compared with cutters of the same kind and with the same model number, and the operation is stable.

Description

Energy-saving source for air plasma cutter

The utility model relates to a kind of circuit arrangement of distribution, particularly a kind of air plasma cutter energy-saving electric power.

For satisfying the plasma arc steady burning condition, at present the power supply of plasma cutting machines all with high-leakage impedance transformer as power transformer, the floating voltage height, operating voltage is low, active power only accounts for below 40% of equipment transformer capacity, and more than 60% as reactive power consumption on leakage reactance, occupy net capacity, utilization rate of electrical is low.

The purpose of this utility model is for overcoming above-mentioned weak point, and provide a kind of energy-saving effect obviously, can reduce the air plasma cutter energy-saving electric power of transformer capacity.

Air plasma cutter energy-saving electric power of the present utility model comprises working power, starting the arc unit, casing, it is characterized in that it also helps arc power, control module.Under enough air pressure drives, working power is respectively through rectifier bridge output services voltage with to helping arc power output to help arc voltage, help arc voltage to be attempted by the operating voltage two ends by polarity through helping the arc power output, to improve operating voltage, the high-frequency and high-voltage that starting the arc unit produces is added in the starting the arc of operating voltage two ends, after the starting the arc, operating current helps the arc power output to disconnect by control module control, by the smooth combustion of lower operating voltage pilot arc.

Fig. 1 is the utility model structure chart;

Fig. 2 is the utility model electricity theory diagram;

Fig. 3 is the utility model circuit diagram;

Fig. 4 is a printed circuit board (PCB).

Now illustrated embodiment is made detailed description to the utility model in conjunction with the accompanying drawings.

Working power I comprises transformer T ₁, commutation diode D ₁, D ₂, D ₃, D ₄, D ₅, D ₆, capacitor C ₁, C ₂, C ₃, C ₇, resistance R ₁, R ₂, R ₃, R ₇A.C. contactor J ₁, power switch S ₁, ventilating fan FS, power supply indicator H ₁, H ₂, voltmeter V, ammeter A, pressure controller Y.T ₁Be the three-phase two-winding transformer, winding triangularity---Y-connection, primary winding L ₁, L ₂, L ₃Be connected in series J respectively ₁Normally opened contact J _{1_1}, J _{1_2}, J _{1_3}The back is power input A, B, C, pays winding L ₄, L ₆, L ₈And D ₁～D ₆Connect into three-phase bridge rectifier circuit.Rectification circuit output end respectively and meet G ₇, V and normally-closed contact J _{1 ￣ 4}, R ₇Series arm after, negative terminal connects the negative terminal of the ammeter A that has current divider again, the anode of ammeter A, rectification circuit output plus terminal connect high-frequency generator GP output capacitance C respectively ₁₅Two ends GP exports winding L ₁₀The other end connect the air cooling cable, anode cable connects the rectification circuit output plus terminal.L ₈Output and R ₁, C ₁, C ₂, R ₂Series arm also meets L ₆Output and C ₁, R ₁, R ₃, C ₃Series arm also meets L ₄Output and C ₃, R ₃, R ₂, C ₂Series arm also connects.Input C and S ₁, H ₁One end also meets S ₁The other end and FS, normally opened contact J _{1_5}One end, Y one end also meet J _{1_5}, the Y other end connects H respectively ₂, J ₁Behind the coil, H ₁, FS, H ₂, J ₁The coil other end also meets zero-power line N.

Starting the arc unit II comprises high-frequency generator GP and press button SB ₁SB ₁One end connects Y, J _{1_5}, S ₁And contact, its other end connects GP one input, and another input of GP connects zero-power line N.

Help the arc power III to comprise transformer T ₁Pay winding L ₄, L ₅, L ₆, L ₇, L ₈, L ₉, commutation diode D ₇, D ₈, D ₉, D ₁₀, D ₁₁, D ₁₂, capacitor C ₄, C ₅, C ₆, resistance R ₄, R ₅, R ₆, potentiometer RP ₁L ₅, L ₇, L ₉Respectively with L ₄, L ₆, L ₈After the serial connection, and D ₇～D ₁₂Connect into three-phase bridge rectifier circuit, rectification circuit output plus terminal serial connection A.C. contactor J ₂Normally opened contact J _{2_1}After, connecting rectification circuit output plus terminal among the working power I, rectification circuit output negative terminal connects RP ₁One stiff end, RP ₁Sliding end serial connection normally opened contact J _{2_2}After, connect rectification circuit output negative terminal among the working power I.L ₅Output and R ₅, C ₅, C ₄, R ₄Series arm also meets L ₇Output and R ₄, C ₄, C ₆, R ₆Series arm also meets L ₉Output and C ₅, R ₅, R ₆, C ₆Series arm also connects.

The control module IV comprises transformer T ₂, diode D ₁₃, D ₁₄, D ₁₅, D ₁₆, D ₁₇, D ₁₈, capacitor C ₈, C ₉, C ₁₀, C ₁₁, C ₁₂, C ₁₃, resistance R ₈, R ₉, R ₁₀, R ₁₁, R ₁₂, R ₁₃, R ₁₄, R ₁₅, R ₁₆, R ₁₇, A.C. contactor J ₂, relay J ₃, power switch S ₂, three terminal regulator IC ₂, IC ₃, potentiometer RP ₂, operational amplifier IC ₁, inductance L ₁₁, transistor G ₁, indicator lamp H ₃T ₂An elementary end and S ₂One end, J _{1_1}, L ₁Tie point also connects, the other end and H ₃, J ₂One end of coil is connected to zero-power line N, J ₂Coil other end serial connection J ₃Normally-closed contact J _{3_1}After, and H ₃The other end is connected to S ₂The other end.T ₂Secondary and D ₁₃, D ₁₄, D ₁₅, D ₁₆Be connected into single phase bridge type rectifier circu, output plus terminal also meets C, anodal, IC ₂Input, the output negative terminal also meets C ₈Negative pole, IC ₃Input, IC ₂Output serial connection R ₁₄After, with C ₁₁, R ₁₂One end, D ₁₇Negative pole, J ₃Coil one end, IC ₁7 pin and meet IC ₃Output serial connection R ₁₅After, with C ₁₀, R ₁₃One end, IC ₁4 pin and connect.T ₂Secondary centre tap and C, negative pole, C ₈Positive pole, IC ₂, IC ₃Common port, C ₁₀, C ₁₁, R ₁₂, R ₁₃The other end, R ₁₁An end, the negative terminal of ammeter A, G ₁Emitter stage also connects.R ₁₁Other end serial connection R ₈After, with R ₁₆An end, IC ₁2 pin and meet R ₁₆The other end and IC ₁6 pin, RP ₂A stiff end and meet RP ₂Another stiff end serial connection R ₁₇After, with C ₁₃One end, C ₁₂Negative pole, R ₁₀One end is connected to G ₁Emitter stage.IC ₁3 pin serial connection R, after, with L ₁₁One end, C ₁₂Positive pole also meets L ₁₁, R ₁₀The other end be connected to the anode of ammeter A.C ₁₃The other end connects IC ₁5 pin, RP ₂Sliding end connects D ₁₈Positive pole, D ₁₈Negative pole connects G ₁Base stage, G ₁Colelctor electrode and D ₁₇Anodal, J ₃The coil other end also connects.Each electronic component press Fig. 4, welding shown in Figure 1 good after, be fixed in the casing and on the panel, and draw electric power connection line and output cable.

The utility model is owing to adopt above design, during the starting the arc, help arc power to produce that high voltage is attempted by the working power output so that the rapidly starting the arc, after the starting the arc, operating current helps the arc power output to disconnect by control module control, smooth combustion by lower operating voltage pilot arc, thereby can reduce the transformer capacity of working power, and avoid excessive leakage reactance loss, energy-saving effect is obvious, than the energy-conservation 40-50% of the same type machine of same category of device, and working stability is reliable.

Claims (1)

1, a kind of air plasma cutter energy-saving electric power, comprise working power (I), starting the arc unit (II) and casing, it is characterized in that it also helps arc power (III), control module (IV), under enough air pressure drives, working power (I) is respectively through rectifier bridge output services voltage with to helping arc power (III) output to help arc voltage, help arc voltage to be attempted by the operating voltage two ends by polarity through helping arc power (III) output, to improve operating voltage, the high-frequency and high-voltage that starting the arc unit (II) produces is added in the starting the arc of operating voltage two ends, after the starting the arc, operating current helps arc power (III) output to disconnect by control module (IV) control, by the smooth combustion of lower operating voltage pilot arc.After each electronic component welds, be fixed in the casing and panel on, and draw electric power connection line and output cable.

Images