CN1343032A

CN1343032A - Pulse circuit generating reverse pulses by itself

Info

Publication number: CN1343032A
Application number: CN 01118740
Authority: CN
Inventors: 祁琦; 蒋冠珞
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-16
Filing date: 2001-06-11
Publication date: 2002-04-03

Abstract

A pulse circuit able to automatically generate negative pulse is composed of primary pulse generator, transformer and secondary pulse output circuit consisting of secondary winding and rectifier. Said primary pulse generator can generate cross-zero intermittent pulses.

Description

The impulse circuit of spontaneous reverse impulse

The present invention relates to a kind of impulse circuit of spontaneous reverse impulse, is the technical field that belongs to the additional reverse impulse of impulse circuit, especially for the impulse circuit of plating, electrolysis, charge power supply.

At present, in the impulse circuit technical field, usually need between positive pulse, add reverse impulse, especially for the impulse circuit of plating, electrolysis, charge power supply, as the technology that fast pulse charging machine, lead acid accumulator producer change into, plating, electrolysis etc. all need be used the attached reverse impulse of impulse circuit.Especially the electric energy that lead acid accumulator is a consumption maximum in the world today, purposes is the widest stores device.Therefore, the requirement that charge, pole plate changes into the isopulse power supply also should adapt with the consumption of storage battery.Therefore because the quality of the pulse power and performance can greatly influence the performance of storage battery, the improvement for the impulse circuit function of electrochemical power source did not stop a moment yet.Up-to-date theory thinks that pulse charging technique is to improve accumulator property, improves charge efficiency, the effective way of extending battery life.If in the pulse current charge process, add suitable discharge, perhaps add suitable reverse charging, for the polarization of eliminating pole plate, reduce internal resistance, the charge volume accepted that increases battery has positive effect, when Rational Parameters, its effect is very remarkable.Charging interval can be reduced, energy efficient.These theories have been that everybody accepts, tool this and the impulse circuit of the electrochemical circuit developed is also countless.Yet there is obvious weak point in this technology: the circuit complexity except the positive pulse loop, also will increase reverse impulse loop, continuous current circuit or the like; Next is the control circuit complexity, not only the positive pulse control circuit will be arranged, and also the negative pulse control circuit will be arranged, the 3rd is that the pulse requirement has very big current peak, so the current capacity of device is bigger, so just causes the cost height, technical sophistication, reliability is low and maintenance difficulties is big.

The object of the present invention is to provide a kind of circuit simple and have an impulse circuit of spontaneous reverse impulse, particularly utilize the recovery time of diode and the back edge of each positive pulse to pay the back-emf that produces on the inductance of limit at transformer, automatically form negative pulse, promptly need not the impulse circuit of the spontaneous negative pulse of the traditional freewheeling circuit of special discharge loop, negative pulse generation control circuit, cancellation.

Technical scheme of the present invention is achieved in that the impulse circuit of this spontaneous reverse impulse comprises that mainly former edge-impulse produces circuit, transformer and pays the edge-impulse output circuit, its pair edge-impulse output circuit directly connects rectification circuit output by the transformer secondary side coil, and rectification circuit can be half-wave rectifying circuit, full-wave rectifying circuit and bridge rectifier.

The impulse circuit of described spontaneous reverse impulse, it is can produce one group to have 0 and at the circuit of the pulse of crossing 0 interruption that its former edge-impulse produces circuit, pulse can be an alternating-current pulse, it also can be DC pulse, waveform can be a square wave, also can be other waveform, promptly comprise DC chopper circuit, single phase ac regulation circuit, half-bridge inversion circuit, full bridge inverter, three-phase ac voltage regulation circuit.

The impulse circuit of described spontaneous reverse impulse, the rectification circuit of its pair edge-impulse output circuit can be single-phase half-wave rectifier circuit, full-wave rectifying circuit, single phase bridge type rectifier circu or three-phase bridge rectifier circuit.

Advantage of the present invention is: utilize after the main pulse along the ingenious combination of the inverse electromotive force that causes in transformer secondary side coil inductance and rectifier diode recovery time, form reverse impulse.Its pair edge-impulse output loop is only paid limit inductance, rectification circuit, load (can add resistance) by transformer and is formed, and he is not only applicable to single-end ortho-exciting circuit, single-ended reverse exciting, semi-bridge inversion, full bridge inverter for transformer, is suitable for AC voltage adjusting circuit yet.The same limit of paying is fit to halfwave rectifier, full-wave rectification, single-phase bridge rectification and three-phase bridge rectifier circuit.Saved traditional discharge loop and pulse generation and control circuit, do not needed freewheeling circuit, made circuit extremely simple, reliable, product cost is low, easy care.Under the Synchronization Control condition, sort circuit can and coupling and form the powerful pulse power.

Below accompanying drawing is described: Fig. 1 is that single-phase DC copped wave of the present invention and single-phase half-wave rectifier circuit embodiment, Fig. 2 are former limit semi-bridge inversions, single-phase bridge rectification embodiment circuit diagram, Fig. 3 are former limit full-bridge invertings, pay limit single-phase bridge rectification embodiment circuit diagram, Fig. 4 is a former limit three phase ac voltage regulation, paying limit three-phase bridge rectifier circuit figure, Fig. 5 is former limit single phase ac regulation, and pair limit single-phase bridge rectification embodiment circuit diagram, Fig. 6 pay a limit output current wave figure.B represents transformer, D, D among the figure ₁-D ₆Represent diode, TO ₁-TO ₃Represent bidirectional triode thyristor, ZQ to represent rectifier bridge, Q ₁-Q ₄Represent triode, C to represent electric capacity, I to represent electric current, T to represent time, R to represent load.

Further specify operation principle of the present invention and embodiment below:

Principle of the present invention is the back-emf that utilizes the back edge of recovery time of the inductance of transformer secondary coil and diode and each positive pulse to produce on inductance, produces a reverse impulse automatically.

Further specifying details of the present invention: Fig. 1-Fig. 5 below in conjunction with embodiment is part embodiment schematic diagram of the present invention.According to above-mentioned basic principle, can also be combined into many embodiment.Fig. 6 is the basic waveform of electric current.

Above-mentioned impulse circuit is made of three essential parts: comprise that mainly former edge-impulse produces circuit, transformer and pays the edge-impulse output circuit.

1, when former edge-impulse produces circuit employing inverter circuit, at first by rectification circuit interchange is become direct current, alternating current circuit can be single-phase or three-phase, and ZQ promptly is among the figure.Its objective is and obtain a DC power supply.Can certainly directly use DC generator, solar cell or any other DC power supply to replace.Inverter circuit is the circuit that direct current is become alternating impulse.Adopt the pulse inverting, available pulse-width modulation circuit control contravariant transformer primary coil waveform its objective is as requested, solves through a contravariant transformer and adjusts output pulse frequency, output voltage, isolates with circuit and problems such as miniaturization.Inversion can be adopted single-end circuit such as Fig. 1, semi-bridge inversion such as Fig. 2, full-bridge circuit such as Fig. 3.Inverter circuit institute must pulse-width modulation circuit be that known technology no longer describes in detail.

2, pay the edge-impulse output circuit according to former limit circuit difference and change to some extent, but all without prejudice to its principle: the secondary coil of transformer is directly exported by a rectifier diode, as Fig. 1.Fig. 2, Fig. 3, Fig. 5 are the full-wave bridge rectifier circuit application examples.Fig. 4 represents the three-phase bridge rectifier circuit application example.

Describing principle of the present invention and implementation detail: Fig. 1 in detail with a circuit the most representative below is basic circuit schematic diagram of the present invention, D is a rectifier diode among the figure, if there is a positive pulse to come, coil upper end is timing, rectifying tube D conducting, because the inductance characteristic of coil is when positive pulse finishes in a flash, because the back-emf on the coil, its down terminal potential for just, it will produce a reverse impulse, and this moment, diode D did not turn-off as yet, for induced potential provides path.Therefore, produced negative pulse automatically.

The fact just so, because the reverse recovery characteristic of diode, the disappearance of the potential barrier that becomes when forward conduction electronics heap-shaped on the diode PN junction needs a period of time just can finish, this process is best with＜3 μ s, at this moment diode does not have the directivity of conduction, as same lead, as previously mentioned, this time just in time provides the path of negative pulse.As long as suitable selection coil, diode D and circuit distributed constant just can be realized above-mentioned purpose, thereby obtain current in loop waveform as shown in Figure 6.

The various pulse-generating circuits on the former limit of the present invention are known technology.Inventive point only is to pay the limit does not have any discharge loop, only utilizes the recovery characteristics of diode and transformer to pay the limit inductance, reaches the purpose that produces negative pulse on the back edge of positive pulse automatically.Be not difficult to find out that so long as utilize the recovery characteristics of diode, any form that promptly produces negative pulse recovery time all belongs to protection scope of the present invention.

Claims

1, a kind of impulse circuit of spontaneous reverse impulse, comprise that mainly former edge-impulse produces circuit, transformer and pays the edge-impulse output circuit, it is characterized in that paying the edge-impulse output circuit and directly connect rectification circuit output by the transformer secondary side coil, rectification circuit can be half-wave rectifying circuit, full-wave rectifying circuit and bridge rectifier.

2, the impulse circuit of spontaneous reverse impulse according to claim 1, it is characterized in that it is can produce one group to have 0 and at the circuit of the pulse of crossing 0 interruption that former edge-impulse produces circuit, pulse can be an alternating-current pulse, it also can be unidirectional DC pulse, waveform can be a square wave, also can be other waveform, promptly comprise DC chopper circuit, single phase ac regulation circuit, half-bridge inversion circuit, full bridge inverter, three-phase ac voltage regulation circuit.

3, the impulse circuit of spontaneous reverse impulse according to claim 1 and 2 is characterized in that the rectification circuit of pair edge-impulse output circuit can be single-phase half-wave rectifier circuit, single-phase full-wave rectifer circuit, single phase bridge type rectifier circu or three-phase bridge rectifier circuit.