CN204539000U - A kind of individual pulse power supply - Google Patents
A kind of individual pulse power supply Download PDFInfo
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- CN204539000U CN204539000U CN201520107976.9U CN201520107976U CN204539000U CN 204539000 U CN204539000 U CN 204539000U CN 201520107976 U CN201520107976 U CN 201520107976U CN 204539000 U CN204539000 U CN 204539000U
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Abstract
The utility model discloses a kind of individual pulse power supply, comprise the main control circuit that shakes, power switch driver circuit, power amplification circuit, voltage detecting circuit and DC power supply, the described master signal output part of control circuit that shakes is connected with the signal input part of power switch driver circuit, the signal output part of power switch driver circuit is connected with the signal input part of power amplification circuit, the signal output part of power amplification circuit is connected with voltage detecting circuit signal input part, the signal output part of voltage detecting circuit is connected with the signal input part of the main control circuit that shakes, the pulse power of the present utility model can produce rectangle individual pulse, pulse can be very narrow, most I reaches several microsecond, pulsewidth is controllable, thus energy can be very little and controlled, the pulse power has detection comparing element, closed-loop control can be realized, master shakes control circuit respectively by two high speed photo couplings and power switch driver circuit, voltage detecting circuit is isolated, power supply anti-interference is good.
Description
Technical field
The utility model relates to a kind of individual pulse power supply, particularly a kind of spark machined research individual pulse power supply.
Background technology
The pulse power occupy extremely important status in spark machined, has a great impact the technical-economic index such as stability and tool electrode loss of the productivity ratio of spark machined, surface quality, machining accuracy, the course of processing.The so-called pulse power is the power supply that can produce continuous impulse, and the research of individual pulse spark machined is the basis of continuous impulse Principle of Electric Discharge Machining research, thus needs the individual pulse power supply that can produce individual pulse.The method producing spark machined individual pulse has, between both positive and negative polarity the two poles of the earth of spark machined being directly connected on DC power supply, utilize the Fine Feed of motor to make two interpolars produce individual pulse, but the energy that this two interpolars produce is uncontrollable, has very large randomness; Can also produce individual pulse by rest-set flip-flop and NAND gate, but not reach very narrow pulsewidth, energy is little not.
In prior art, " pulse power supply " disclosed in Authorization Notice No. CN202261076U is a kind of unidirectional pulse power supply, described unidirectional pulse refers to the impulse waveform that the sense of current does not change in time, is a kind of continuous impulse power supply, different from the utility model individual pulse power supply.
Utility model content
Main purpose of the present utility model is to provide a kind of individual pulse power supply, it is a kind of DC power supply that can send individual pulse, this individual pulse power supply can reach adjustable very narrow pulsewidth, and energy can be enough little, is significant to spark machined research.
For achieving the above object, the utility model is by the following technical solutions:
A kind of individual pulse power supply, described individual pulse power supply is connected with workpiece to be machined with spark machined instrument respectively, and described individual pulse power supply comprises: main shake control circuit, power switch driver circuit, power amplification circuit and voltage detecting circuit and DC power supply;
The shake signal output part of control circuit of described master is connected with the signal input part of described power switch driver circuit, the signal output part of described power switch driver circuit is connected with the signal input part of described power amplification circuit, the signal output part of described power amplification circuit is connected with a signal input part of described voltage detecting circuit, the shake signal input part of control circuit of signal output part and the described master of described voltage detecting circuit is connected, the signal output part of described power amplification circuit is connected with spark machined instrument simultaneously, the positive pole of described DC power supply is connected with the energy input of described power amplification circuit, the negative pole of described DC power supply is connected with workpiece to be machined, described workpiece to be machined is also connected with another signal input part of described voltage detecting circuit.
Further, described power amplification circuit comprises: power switch pipe Q, the first diode D1, the second diode D2, the 3rd diode D3, the first voltage-stabiliser tube Z1, the second voltage-stabiliser tube Z2, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, inductance L, the first electric capacity C1, the second electric capacity C2, noninductive current-limiting resistance JP and LED.
Further, it is characterized in that, the positive pole of described DC power supply connects one end of noninductive current-limiting resistance JP and the negative electrode of the first diode D1 respectively, the other end of noninductive current-limiting resistance JP connects the anode of the first diode D1 and the anode of the second diode D2 respectively, the negative electrode of the second diode D2 connects one end of inductance L and one end of the first resistance R1 respectively, the other end of inductance L connects the drain electrode of power switch pipe Q and the anode of the 3rd diode D3 respectively, the other end of the first resistance R1 connects the negative electrode of the 3rd diode D3 and one end of the first electric capacity C1 respectively, the grid of power switch pipe Q connects the negative pole of the first voltage-stabiliser tube Z1 respectively, one end of second resistance R2, one end of second electric capacity C2 and one end of the 3rd resistance R3, the other end of the 3rd resistance R3 connects the other end of the second electric capacity C2 and the anode of LED respectively, the negative electrode of LED is connected with one end of the 4th resistance R4, the positive pole of the first voltage-stabiliser tube Z1 is connected with the positive pole of the second voltage-stabiliser tube Z2, the source electrode of power switch pipe Q connects spark machined instrument respectively, the other end of the first electric capacity C1, the negative pole of the second voltage-stabiliser tube Z2, the other end of the second resistance R2 and the other end of the 4th resistance R4.
Further, described master shakes the active crystal oscillator that control circuit comprises single-chip microcomputer and is connected with described single-chip microcomputer.
Further, described single-chip microcomputer comprises AT90S8535 single-chip microcomputer.
Further, the described power switch driver circuit power switch driving chip that comprises high speed photo coupling and be connected with described high speed photo coupling output.
Further, described high speed photo coupling comprises 6N137 chip, and described power switch driving chip comprises TPS2812 chip.
Further, described power switch pipe Q comprises MOSFET-IRF740 chip, and described power switch pipe Q adopts the source electrode way of output.
Further, the high speed photo coupling that described voltage detecting circuit comprises voltage comparator and is connected with described voltage comparator output.
Further, described voltage comparator comprises LM339N chip, and described high speed photo coupling comprises 6N137 chip.
The pulse power of the present utility model can produce rectangular shape individual pulse, the Square wave pulses pulsewidth that the pulse power produces can be very narrow, most I reaches several microsecond, pulsewidth is controllable, thus energy can be very little and controlled, the pulse power has detection comparing element, closed-loop control can be realized, be that the master of core shakes control circuit respectively by two high speed photo couplings and power switch driver circuit with single-chip microcomputer, voltage detecting circuit is isolated, therefore power supply anti-interference is good, in addition independently working power is adopted, good stability, and the noninductive current-limiting resistance of the pulse power is only at pulse width time internal consumption electric flux, heat energy loss is low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the utility model power amplification circuit schematic diagram.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is explained in further detail.Should be appreciated that specific embodiment described herein only for explaining the utility model, and be not used in restriction the utility model.
On the contrary, the utility model is contained any by the substituting of making on marrow of the present utility model and scope of defining of claim, amendment, equivalent method and scheme.Further, in order to make the public have a better understanding to the utility model, in hereafter details of the present utility model being described, detailedly describe some specific detail sections.Do not have the description of these detail sections can understand the utility model completely for a person skilled in the art yet.Below in conjunction with accompanying drawing and embodiment, the utility model is further illustrated.
As shown in Figure 1, a kind of individual pulse power supply, described individual pulse power supply is connected with workpiece to be machined with spark machined instrument respectively, described individual pulse power supply comprises: the main control circuit 1 that shakes, power switch driver circuit 2, power amplification circuit 3, voltage detecting circuit 4 and DC power supply 5, the shake signal output part of control circuit 1 of described master is connected with the signal input part of described power switch driver circuit 2, the signal output part of described power switch driver circuit 2 is connected with the signal input part of described power amplification circuit 3, the signal output part of described power amplification circuit 3 is connected with a signal input part of described voltage detecting circuit 4, the shake signal input part of control circuit 1 of signal output part and the described master of described voltage detecting circuit 4 is connected, the signal output part of described power amplification circuit 3 is connected with spark machined instrument simultaneously, the signal output part of described power amplification circuit 3 is the pulse power output of the utility model individual pulse power supply, the positive pole of described DC power supply 5 is connected with the energy input of described power amplification circuit 3, the negative pole of described DC power supply 5 is connected with workpiece to be machined, described workpiece to be machined is also connected with another signal input part of described voltage detecting circuit 4, described master shakes the active crystal oscillator that control circuit 1 comprises single-chip microcomputer and is connected with described single-chip microcomputer, AT90S8535 single-chip microcomputer chosen by described single-chip microcomputer, the power switch driving chip that described power switch driver circuit 2 comprises high speed photo coupling and is connected with described high speed photo coupling output, described high speed photo coupling chooses 6N137 chip, described power switch driving chip chooses TPS2812.
As shown in Figure 2, described power amplification circuit comprises: power switch pipe Q, the first diode D1, the second diode D2, the 3rd diode D3, the first voltage-stabiliser tube Z1, the second voltage-stabiliser tube Z2, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, inductance L, the first electric capacity C1, the second electric capacity C2, noninductive current-limiting resistance JP and LED.Described power switch pipe Q chooses N channel enhancement MOSFET-IRF740 chip.The positive pole of described DC power supply 5 connects one end of noninductive current-limiting resistance JP and the negative electrode of the first diode D1 respectively, the other end of noninductive current-limiting resistance JP connects the anode of the first diode D1 and the anode of the second diode D2 respectively, the negative electrode of the second diode D2 connects one end of inductance L and one end of the first resistance R1 respectively, the other end of inductance L connects the drain electrode of power switch pipe Q and the anode of the 3rd diode D3 respectively, the other end of the first resistance R1 connects the negative electrode of the 3rd diode D3 and one end of the first electric capacity C1 respectively, the grid of power switch pipe Q connects the negative pole of the first voltage-stabiliser tube Z1 respectively, one end of second resistance R2, one end of second electric capacity C2 and one end of the 3rd resistance R3, the other end of the 3rd resistance R3 connects the other end of the second electric capacity C2 and the anode of LED respectively, the negative electrode of LED is connected with one end of the 4th resistance R4, the positive pole of the first voltage-stabiliser tube Z1 is connected with the positive pole of the second voltage-stabiliser tube Z2, the source electrode of power switch pipe Q connects spark machined instrument respectively, the other end of the first electric capacity C1, the negative pole of the second voltage-stabiliser tube Z2, the other end of the second resistance R2 and the other end of the 4th resistance R4.
Described power switch pipe Q adopts the source electrode way of output, and described power switch pipe Q selects MOSFET, has three electrodes to be respectively grid, source electrode and drain electrode.The instrument of spark machined is connected with the source electrode of workpiece with power switch pipe Q, and also namely the discharging gap of spark machined is connected with the source electrode of power switch pipe Q.
The high speed photo coupling that described voltage detecting circuit 4 comprises voltage comparator and is connected with described voltage comparator output, described voltage comparator chooses LM339N chip, and described high speed photo coupling chooses 6N137 chip.
The utility model is in the specific implementation: after system electrification, the single-chip microcomputer of the main control circuit 1 that shakes exports high level, high level still maintains high level state after power switch driver circuit 2, but in power switch driver circuit 2, obtain larger voltage, thus be enough to the grid of driving power switching tube Q, thus the power switch pipe Q conducting of power amplification circuit 3, DC power supply 5 is just now being equivalent to, negative pole is directly connected with spark machined instrument and workpiece to be machined respectively, along with spark machined instrument reduces the distance between workpiece to be machined gradually, when producing spark discharge processing apart from the medium punctured time suitable between instrument and workpiece, the state of voltage detecting circuit 4 real time on-line monitoring spark machined instrument and workpiece to be machined discharging gap, feed back in single-chip microcomputer, form closed-loop control, when medium between instrument and workpiece does not puncture, voltage detecting circuit 4 exports high level and shakes in the single-chip microcomputer of control circuit 1 to main, the single-chip microcomputer of the main control circuit 1 that shakes does not perform delay procedure, continue to continue to export high level, during Dielectric Disruptive Discharge when between instrument and workpiece, voltage detecting circuit 4 changes output low level into and shakes in the single-chip microcomputer of control circuit 1 to main, now master shake control circuit 1 single-chip microcomputer perform delay procedure to set pulsewidth, obtain individual pulse, the i.e. pulse of rectangular shape, then master shakes the single-chip microcomputer output low level of control circuit 1, low level still maintains low level state after power switch driver circuit 2, but low level is not enough to the grid of driving power switching tube Q, thus the power switch pipe Q of power amplification circuit 3 ends, electric discharge is terminated between instrument and workpiece.Said process can repeat, and pulse duration can control, and changes pulse duration and only need change the C language delay procedure that programming enters single-chip microcomputer.
The pulse power of the present utility model can produce rectangular shape individual pulse, the Square wave pulses pulsewidth that the pulse power produces can be very narrow, most I reaches several microsecond, pulsewidth is controllable, thus energy can be very little and controlled, the pulse power has detection comparing element, closed-loop control can be realized, be that the master of core shakes control circuit respectively by two high speed photo couplings and power switch driver circuit with single-chip microcomputer, voltage detecting circuit is isolated, therefore power supply anti-interference is good, in addition independently working power is adopted, good stability, and the noninductive current-limiting resistance of the pulse power is only at pulse width time internal consumption electric flux, heat energy loss is low.
Claims (10)
1. an individual pulse power supply, described individual pulse power supply is connected with workpiece to be machined with spark machined instrument respectively, it is characterized in that, described individual pulse power supply comprises: main shake control circuit (1), power switch driver circuit (2), power amplification circuit (3) and voltage detecting circuit (4) and DC power supply (5);
The shake signal output part of control circuit (1) of described master is connected with the signal input part of described power switch driver circuit (2), the signal output part of described power switch driver circuit (2) is connected with the signal input part of described power amplification circuit (3), the signal output part of described power amplification circuit (3) is connected with a signal input part of described voltage detecting circuit (4), the shake signal input part of control circuit (1) of signal output part and the described master of described voltage detecting circuit (4) is connected, the signal output part of described power amplification circuit (3) is connected with spark machined instrument simultaneously, the positive pole of described DC power supply (5) is connected with the energy input of described power amplification circuit (3), the negative pole of described DC power supply (5) is connected with workpiece to be machined, described workpiece to be machined is also connected with another signal input part of described voltage detecting circuit (4).
2. individual pulse power supply according to claim 1, it is characterized in that, described power amplification circuit comprises: power switch pipe Q, the first diode D1, the second diode D2, the 3rd diode D3, the first voltage-stabiliser tube Z1, the second voltage-stabiliser tube Z2, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, inductance L, the first electric capacity C1, the second electric capacity C2, noninductive current-limiting resistance JP and LED.
3. individual pulse power supply according to claim 2, it is characterized in that, the positive pole of described DC power supply (5) connects one end of noninductive current-limiting resistance JP and the negative electrode of the first diode D1 respectively, the other end of noninductive current-limiting resistance JP connects the anode of the first diode D1 and the anode of the second diode D2 respectively, the negative electrode of the second diode D2 connects one end of inductance L and one end of the first resistance R1 respectively, the other end of inductance L connects the drain electrode of power switch pipe Q and the anode of the 3rd diode D3 respectively, the other end of the first resistance R1 connects the negative electrode of the 3rd diode D3 and one end of the first electric capacity C1 respectively, the grid of power switch pipe Q connects the negative pole of the first voltage-stabiliser tube Z1 respectively, one end of second resistance R2, one end of second electric capacity C2 and one end of the 3rd resistance R3, the other end of the 3rd resistance R3 connects the other end of the second electric capacity C2 and the anode of LED respectively, the negative electrode of LED is connected with one end of the 4th resistance R4, the positive pole of the first voltage-stabiliser tube Z1 is connected with the positive pole of the second voltage-stabiliser tube Z2, the source electrode of power switch pipe Q connects spark machined instrument respectively, the other end of the first electric capacity C1, the negative pole of the second voltage-stabiliser tube Z2, the other end of the second resistance R2 and the other end of the 4th resistance R4.
4. individual pulse power supply according to claim 1, is characterized in that, described master shakes the active crystal oscillator that control circuit (1) comprises single-chip microcomputer and is connected with described single-chip microcomputer.
5. individual pulse power supply according to claim 4, is characterized in that, described single-chip microcomputer comprises AT90S8535 single-chip microcomputer.
6. individual pulse power supply according to claim 1, is characterized in that, the power switch driving chip that described power switch driver circuit (2) comprises high speed photo coupling and is connected with described high speed photo coupling output.
7. individual pulse power supply according to claim 6, is characterized in that, described high speed photo coupling comprises 6N137 chip, and described power switch driving chip comprises TPS2812 chip.
8. individual pulse power supply according to claim 2, is characterized in that, described power switch pipe Q comprises MOSFET-IRF740 chip, and described power switch pipe Q adopts the source electrode way of output.
9. individual pulse power supply according to claim 1, is characterized in that, the high speed photo coupling that described voltage detecting circuit (4) comprises voltage comparator and is connected with described voltage comparator output.
10. individual pulse power supply according to claim 9, is characterized in that, described voltage comparator comprises LM339N chip, and described high speed photo coupling comprises 6N137 chip.
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| CN201520107976.9U CN204539000U (en) | 2015-02-13 | 2015-02-13 | A kind of individual pulse power supply |
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| CN201520107976.9U CN204539000U (en) | 2015-02-13 | 2015-02-13 | A kind of individual pulse power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104702142A (en) * | 2015-02-13 | 2015-06-10 | 北京星航机电装备有限公司 | Single pulse power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104702142A (en) * | 2015-02-13 | 2015-06-10 | 北京星航机电装备有限公司 | Single pulse power supply |
| CN104702142B (en) * | 2015-02-13 | 2018-02-02 | 北京星航机电装备有限公司 | A kind of individual pulse power supply and its control method |
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