CN2101553U

CN2101553U - Portable energy saving plasma cutting machine

Info

Publication number: CN2101553U
Application number: CN 91222256
Authority: CN
Inventors: 刘忠仁
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-09-28
Filing date: 1991-09-28
Publication date: 1992-04-15

Abstract

The utility model provides a portable energy saving plasma cutting machine. Three sets of capacitor sets of which the capacities are equal are connected by a relay, by using a delta connection, three sets of bridge-typed rectifier sets are connected into the utility model, an arc-striking circuit is positioned behind the three sets of bridge-typed rectifier sets, and then a cutting torch is connected. The utility model has the characteristics of small size, convenient carrying, simple technology, energy saving, material saving, low cost, etc. The utility model can be widely used for cutting steel and non-ferrous metal classes.

Description

Portable energy saving plasma cutting machine

The utility model relates to a kind of CUT, particularly a kind of portable energy-saving CUT.

The CUT of China's use at present substantially all adopted relay to connect a transformer, and transformer connects the version of full bridge rectifier again.Not only volume is greatly and heavy for the CUT of this structure, and technology is also complicated, and power consumption is many, also is out of order easily, and cost is also very expensive.

The purpose of this utility model provides a kind of portable energy-saving CUT that the equal capacitor group of a kind of usefulness three pool-sizes replaces transformer, and not only volume is little for it, and is in light weight, technology is simple, power consumption is few, but also has reduced fault rate, and cost is also very cheap.

The purpose of this utility model is achieved in that it includes capacitor group and three groups of bridge rectifier groups formations that three pool-sizes equate.It is characterized in that relay connected the capacitor group that three pool-sizes equate, with delta connection the capacitor group is inserted the bridge rectifier group, and the output of three groups of bridge rectifiers pressed both positive and negative polarity and together, connect π formula wave filter in bridge rectifier group back, connect arc ignition circuit again, arc ignition circuit is received on the cutting torch.

The utility model has the advantages that: volume is little, and is in light weight, and easy to carry, and it is simple also to have technology, novel structure, and energy-conservation, joint is expected, low cost and other advantages.

Do the embodiment explanation below in conjunction with accompanying drawing.

Fig. 1 is electrical structure figure of the present utility model.

Fig. 2 is the course of work of the present utility model (principle) figure.

Fig. 3 is an energy-saving principle isoboles of the present utility model.

Fig. 4 is the electrical structure figure of existing CUT.

As shown in Figure 1, cross the CZ that relay CJ connects the capacitor group that A, B, C three pool-sizes equate, insert bridge rectifier group ZL by delta connection in the back of capacitor group CZ.Three groups of bridge rectifier outputs are pressed both positive and negative polarity also together, the π formula wave filter that connects capacitor C 1, inductance L, capacitor C 2 compositions in bridge rectifier group back again, connect the arc ignition circuit of forming by step-up transformer B1, high-frequency step-up transformer B2, high-frequency bypass capacitor C2, SD H again, connect cutting torch G again.KG is a controller, it directly is connected with step-up transformer B1, controller KG is a control circuit of realizing job order, available transistor circuit or integrated circuit are realized, chronologically to relay CJ, arc ignition circuit and the gas circuit Q control of powering, these three kinds of circuit are received respectively on three corresponding relays of KG respectively.π formula wave filter can play two effects: the one, and to the power supply output filtering of its front, the 2nd, high frequency bypass provides path to high frequency voltage.

As shown in Figure 2, after the cutting torch K switch was left, cutting torch gas Q was sprayed by cutting torch, and this moment, cutting torch did not have electric current to flow through, and high-frequency arc strike B1 gives electricity after delaying time, and produces high frequency voltage, and cutting torch begins to produce electric current, and electric arc sprays from cutting torch, begins cutting.

As shown in Figure 3, do not have electric current output before the striking, be equivalent to capacitance open circuit, be equivalent to electric capacity after the striking and be connected to the grid.Can accomplish economize on electricity this moment.

As shown in Figure 4, owing to adopt transformer, so volume is big, heaviness, the cost height, the circuit complexity, power factor is low, and loss is big

Operation principle: behind power connection, directly received on the cutting torch at the nearly 500 volts DC voltage of generation after the rectification, the electric arc that after adding high frequency voltage, ignites, main circuit current keeps electric arc by cutting torch, and cutting torch voltage drops to 20 volts and finishes until cutting.Can find out electricity saving performance in the course of work thus, after giving electricity, before electric arc ignites, circuit keeps voltage and does not have electric current output, so electric capacity is equivalent to open circuit, after electric arc ignited, electric capacity was equivalent to be connected to the grid, can improve the power factor of electrical network, reduce the reactive power loss of electrical network and improve the effect of electrical network waveform.

Because the utility model replaces transformer with the capacitor group that three pool-sizes equate, therefore there is not no-load current, so just do not have iron loss, copper loss and leakage field equal loss, because three groups of electric capacity equate, can guarantee the symmetry of threephase load, in addition, adopt electric capacity capacitive reactance power supply cost low, because the exportable 1A electric current of 7 μ F electric capacity, export the 40A electric current if desired, only about 400 yuan of need are just passable, adopt transformer then to need more than 1,000 yuan, can save steel and silicon chip again simultaneously.

Because electric capacity itself does not absorb energy, can not produce heat, there are not overload and arcing time factor yet, therefore, machine intimate also need not add the electric fan heat radiation.

Claims

1, a kind of portable energy-saving CUT, it is characterized in that relay connected the capacitor group that three pool-sizes equate, with delta connection the capacitor group is inserted the bridge rectifier group, and the output of three groups of bridge rectifiers pressed both positive and negative polarity and together, connect π formula wave filter in bridge rectifier group back, connect arc ignition circuit again, arc ignition circuit is received on the cutting torch.