CN202824897U - Improved electrical process machine pulsed power supply - Google Patents
Improved electrical process machine pulsed power supply Download PDFInfo
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- CN202824897U CN202824897U CN201220496014.3U CN201220496014U CN202824897U CN 202824897 U CN202824897 U CN 202824897U CN 201220496014 U CN201220496014 U CN 201220496014U CN 202824897 U CN202824897 U CN 202824897U
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- inductance
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Abstract
The utility model discloses an improved electrical process machine pulsed power supply which comprises a power supply. The improved electrical process machine pulsed power supply is characterized in that two ends of the power supply are in series connection with a first power switch, a current-limiting inductance, a first feeder distribution parameter distributed inductance, a workpiece, a processing electrode, a second feeder distribution parameter distributed inductance and a second power switch. The circuit further comprises a third freewheel diode. One end of the third freewheel diode is connected with the power supply and the other end of the third freewheel diode is connected with the current-limiting inductance. The third freewheel diode is applied in the improved electrical process machine pulsed power supply, when controlling impulses are over, the processing current which discharges continually to the workpiece reduces quickly from peak to zero, so that the back porch of the triangular wave shape is steeper than that of an original bridge circuit and the fall time is shorter. On the premise that other advantages of the original bridge circuit are maintained, wastage of a tool electrode is further reduced.
Description
Technical field
The utility model relates to a kind of modified pulse power source for electric working machine tool.
Background technology
Be applied to the pulse power of electrical process machine, the shape of its output current wave is directly connected to the size of tool electrode loss, theory has proved that with experiment square wave makes the loss of tool-electrode much bigger than triangular wave, and the rear edge of triangular wave is more steep better, and it is more short better to that is to say that the electric current triangular wave of exporting drops to the zero time from its peak value.
The waveform of early stage its output current of pulse power source for electric working machine tool all is square wave, after improving, a kind of pulse power that is called the staircase waveform output current was arranged afterwards, sort circuit adopts digital synthesis technology to simulate the output triangular current, this waveform and triangular wave are very approaching, and trailing edge is very steep, and the results show gets along with greatly to the loss that reduces tool-electrode.But, more than two kinds of circuit structures that the pulse power all is the energy consumption form, in process the waste of electric energy surprising, and realize that the circuit structure of staircase waveform waveform is also complicated, reliability is not high.At present, in electrical process machine, promote gradually a kind of bridge-type pulse output work discharge source circuit (hereinafter to be referred as bridge circuit) that is called, to substitute traditional energy consumption formula pulse power source for electric working machine tool.
The bridge circuit pulse power two large advantages of having compared with traditional energy consumption formula pulse power: (one), Energy Intensity Reduction be (being energy-conservation more than 80%) more than 80%; (2), output current wave is triangular wave, the loss of tool-electrode is reduced greatly, and circuit structure is simple, reliability is high.But we think all right further improvement of the output waveform of bridge circuit further descends the loss of tool-electrode, and we now release a kind of modified pulse power source for electric working machine tool at this.
Summary of the invention
The utility model purpose is: a kind of modified pulse power source for electric working machine tool is provided, this power supply improves existing bridge circuit, in major loop, add a fly-wheel diode, the characteristic that had both kept primary circuit, improved again the output waveform of primary circuit, the loss of tool-electrode is further reduced.
The technical solution of the utility model is: a kind of modified pulse power source for electric working machine tool, comprise power supply, it is characterized in that: the two ends of described power supply are in series with the first power switch, current-limiting inductance, the first feeder line distributed constant distributed inductance, workpiece, machined electrode, the second feeder line distributed constant distributed inductance, the second power switch, also comprise the 3rd fly-wheel diode in the circuit, described the 3rd fly-wheel diode one end links to each other with power supply, and the other end links to each other with current-limiting inductance.
Preferably, the order of described power supply two ends element series connection is followed successively by the first power switch, current-limiting inductance, the first feeder line distributed constant distributed inductance, workpiece, machined electrode, the second feeder line distributed constant distributed inductance, the second power switch, described the 3rd fly-wheel diode is connected between the positive terminal of power supply and the end of current-limiting inductance (this end links to each other with the first feeder line distributed constant distributed inductance), and the negative electrode of the 3rd fly-wheel diode is connected with the positive terminal of power supply, anode is connected with an end (this end links to each other with the first feeder line distributed constant distributed inductance) of current-limiting inductance.
Another kind of circuit structure is, the order of described power supply two ends element series connection also can be followed successively by the first power switch, the first feeder line distributed constant distributed inductance, workpiece, machined electrode, the second feeder line distributed constant distributed inductance, current-limiting inductance, the second power switch, described the 3rd fly-wheel diode is connected between the negative pole end of power supply and the end of current-limiting inductance (this end links to each other with the second feeder line distributed constant distributed inductance), and the negative electrode of the 3rd fly-wheel diode is connected with an end (this end links to each other with the second feeder line distributed constant distributed inductance) of current-limiting inductance, anode is connected with the negative pole end of power supply.
Preferably, leave the gap between described workpiece and the machined electrode, be connected with the first fly-wheel diode between the output of described the first power switch and the negative pole end of power supply, and the negative electrode of the first fly-wheel diode is connected with the output of the first power switch, anode is connected with the negative pole end of power supply, be connected with the second fly-wheel diode between the input of the positive terminal of described power supply and the second power switch, and the negative electrode of the second fly-wheel diode is connected with the positive terminal of power supply, anode is connected with the input of the second power switch.
Preferably, described the first power switch and the second power switch are any one in bipolar transistor, metal-oxide-semiconductor, the IGBT pipe, or any one module that is combined into, or any two module that is combined into, or any three kinds of modules that are combined into.
Preferably, described current-limiting inductance is inductance element.
Preferably, described feeder line distributed constant distributed inductance is the distributed inductance in the feeder line.
The utility model has the advantages that:
1. the utility model has adopted the 3rd fly-wheel diode, when control impuls finishes, workpiece is continued the processing electric current of discharge rapidly from its peak atenuation to zero, make the rear edge of triangular wave waveform steeper than the rear edge of the triangular wave waveform of former bridge circuit, die-away time is shorter, thereby has further reduced the loss of tool-electrode.
2. the utility model has also kept other advantage of former bridge circuit constant so that the former bridge circuit of the loss ratio of tool-electrode is low simultaneously.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is the circuit structure diagram one of bridge circuit;
Fig. 2 is the circuit structure diagram two of bridge circuit;
Fig. 3 is improved electric machining tool pulse power supply circuit structure chart one;
Fig. 4 is improved electric machining tool pulse power supply circuit structure chart two.
Wherein: 1, power supply; 2, the first power switch; 3, current-limiting inductance; 4, workpiece; 5, the second power switch; 6, machined electrode; 7, the first fly-wheel diode; 8, the second fly-wheel diode; 9, the 3rd fly-wheel diode; 10, the first feeder line distributed constant distributed inductance; 11, the second feeder line distributed constant distributed inductance.
The specific embodiment
Embodiment: as shown in Figure 3, the two ends of described power supply 1 are in series with the first power switch 2 successively, current-limiting inductance 3, the first feeder line distributed constant distributed inductance 10, workpiece 4, machined electrode 6, the second feeder line distributed constant distributed inductance 11, the second power switch 5, also comprise the 3rd fly-wheel diode 9 in the circuit, described the 3rd fly-wheel diode 9 is connected in the positive terminal of power supply 1 and an end of current-limiting inductance 3 (this end with the first feeder line distributed constant distributed inductance 10 links to each other between), and the negative electrode of the 3rd fly-wheel diode 9 is connected with the positive terminal of power supply 1, one end (this end and the first feeder line distributed constant distributed inductance 10 phase downlink connection) of anode and current-limiting inductance 3.
Leave the gap between described workpiece 4 and the machined electrode 6, be connected with the first fly-wheel diode 7 between the negative pole end of the output of described the first power switch 2 and power supply 1, and the negative electrode of the first fly-wheel diode 7 is connected with the output of the first power switch 2, anode is connected with the negative pole end of power supply 1, be connected with the second fly-wheel diode 8 between the input of the positive terminal of described power supply 1 and the second power switch 5, and the negative electrode of the second fly-wheel diode 8 is connected with the positive terminal of power supply 1, anode is connected with the input of the second power switch 5.
Described the first power switch 2 and the second power switch 5 are any one in bipolar transistor, metal-oxide-semiconductor, the IGBT pipe, or any one module that is combined into, or any two module that is combined into, or any three kinds of modules that are combined into.
Described current-limiting inductance 3 is inductance elements.Described feeder line distributed constant distributed inductance is the distributed inductance in the feeder line.
The operation principle of present embodiment is as follows:
Control impuls t
ONWhen coming, open the first power switch 2 and the second power switch 5, power supply 1 is given gap U through current-limiting inductance 3 and the first feeder line distributed constant distributed inductance 10, the second feeder line distributed constant distributed inductance 11
eDischarge processing, because the metering function of inductance, electric current is that rising edge is i from the triangular wave of zero rising
ON
As control impuls t
ONDuring end, Current rise is to peak value, and the energy that store in current-limiting inductance 3 and the feeder line distributed constant distributed inductance this moment is maximum, and begins to produce freewheel current by fly-wheel diode, and freewheel current is from peak atenuation to zero.Wherein, the electric energy that is stored in the inductance 3 all turns back to supply current through the 3rd fly-wheel diode 9, and the freewheel current of generation is i
D1, and be stored in electric energy in the feeder line distributed inductance on the one hand still to gap U
eDischarge processing is also returned energy storage to power supply 1 simultaneously, and the freewheel current of generation is i
D2Because the inductance value of the first feeder line distributed constant distributed inductance 10 and the second feeder line distributed constant distributed inductance 11 is much smaller than the inductance value of current-limiting inductance 3, energy storage is more much smaller than current-limiting inductance 3, so i
D2Compare i
D1Decay soon, because the electric energy that 4 continuation discharges are processed to workpiece just is stored in the electric energy in first, second feeder line distributed constant distributed inductance, so workpiece 4 is continued the processing electric current of discharge rapidly from its peak atenuation to zero, the rear edge that is to say triangular wave is very steep, thereby makes the loss of tool-electrode less.
Another kind of embodiment is: as shown in Figure 4, the two ends of described power supply 1 are in series with the first power switch 2 successively, the first feeder line distributed constant distributed inductance 10, workpiece 4, machined electrode 6, the second feeder line distributed constant distributed inductance 11, current-limiting inductance 3, the second power switch 5, also comprise the 3rd fly-wheel diode 9 in the circuit, described the 3rd fly-wheel diode 9 is connected in the negative pole end of power supply 1 and an end of current-limiting inductance 3 (this end with the second feeder line distributed constant distributed inductance 11 links to each other between), and an end (this end and the second feeder line distributed constant distributed inductance 11 phase downlink connection) of the negative electrode of the 3rd fly-wheel diode 9 and current-limiting inductance 3, anode is connected with the negative pole end of power supply 1.
Leave the gap between described workpiece 4 and the machined electrode 6, be connected with the first fly-wheel diode 7 between the negative pole end of the output of described the first power switch 2 and power supply 1, and the negative electrode of the first fly-wheel diode 7 is connected with the output of the first power switch 2, anode is connected with the negative pole end of power supply 1, be connected with the second fly-wheel diode 8 between the input of the positive terminal of described power supply 1 and the second power switch 5, and the negative electrode of the second fly-wheel diode 8 is connected with the positive terminal of power supply 1, anode is connected with the input of the second power switch 5.
The operation principle of this embodiment is identical with a upper embodiment.
Certainly above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the people who is familiar with technique can understand content of the present utility model and according to this enforcement, can not limit protection domain of the present utility model with this.All modifications of doing according to the Spirit Essence of the utility model main technical schemes all should be encompassed within the protection domain of the present utility model.
Claims (7)
1. modified pulse power source for electric working machine tool, comprise power supply, it is characterized in that: the two ends of described power supply (1) are in series with the first power switch (2), current-limiting inductance (3), the first feeder line distributed constant distributed inductance (10), workpiece (4), machined electrode (6), the second feeder line distributed constant distributed inductance (11), the second power switch (5), also comprise the 3rd fly-wheel diode (9) in the circuit, described the 3rd fly-wheel diode (9) one ends link to each other with power supply (1), and the other end links to each other with current-limiting inductance (3).
2. modified pulse power source for electric working machine tool according to claim 1, it is characterized in that: the order of described power supply (1) two ends element series connection is followed successively by the first power switch (2), current-limiting inductance (3), the first feeder line distributed constant distributed inductance (10), workpiece (4), machined electrode (6), the second feeder line distributed constant distributed inductance (11), the second power switch (5), described the 3rd fly-wheel diode (9) is connected between the end of the positive terminal of power supply (1) and current-limiting inductance (3), this end links to each other with the first feeder line distributed constant distributed inductance (10), and the negative electrode of the 3rd fly-wheel diode (9) is connected with the positive terminal of power supply (1), the anode of described the 3rd fly-wheel diode (9) is connected with an end of current-limiting inductance (3), and this end links to each other with the first feeder line distributed constant distributed inductance (10).
3. modified pulse power source for electric working machine tool according to claim 1, it is characterized in that: the order of described power supply (1) two ends element series connection is followed successively by the first power switch (2), the first feeder line distributed constant distributed inductance (10), workpiece (4), machined electrode (6), the second feeder line distributed constant distributed inductance (11), current-limiting inductance (3), the second power switch (5), described the 3rd fly-wheel diode (9) is connected between the end of the negative pole end of power supply (1) and current-limiting inductance (3), this end links to each other with the second feeder line distributed constant distributed inductance (11), and the negative electrode of the 3rd fly-wheel diode (9) is connected with an end of current-limiting inductance (3), this end links to each other with the second feeder line distributed constant distributed inductance (11), and the anode of described the 3rd fly-wheel diode (9) is connected with the negative pole end of power supply (1).
4. according to claim 2 or 3 described modified pulse power source for electric working machine tool, it is characterized in that: leave the gap between described workpiece (4) and the machined electrode (6), be connected with the first fly-wheel diode (7) between the negative pole end of the output of described the first power switch (2) and power supply (1), and the negative electrode of the first fly-wheel diode (7) is connected with the output of the first power switch (2), anode is connected with the negative pole end of power supply (1), be connected with the second fly-wheel diode (8) between the input of the positive terminal of described power supply (1) and the second power switch (5), and the negative electrode of the second fly-wheel diode (8) is connected with the positive terminal of power supply (1), anode is connected with the input of the second power switch (5).
5. modified pulse power source for electric working machine tool according to claim 1, it is characterized in that: described the first power switch (2) and the second power switch (5) are any one in bipolar transistor, metal-oxide-semiconductor, the IGBT pipe, or any one module that is combined into, or any two module that is combined into, or any three kinds of modules that are combined into.
6. modified pulse power source for electric working machine tool according to claim 1, it is characterized in that: described current-limiting inductance (3) is inductance element.
7. modified pulse power source for electric working machine tool according to claim 1, it is characterized in that: described feeder line distributed constant distributed inductance is the distributed inductance in the feeder line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220496014.3U CN202824897U (en) | 2012-09-26 | 2012-09-26 | Improved electrical process machine pulsed power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220496014.3U CN202824897U (en) | 2012-09-26 | 2012-09-26 | Improved electrical process machine pulsed power supply |
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| Publication Number | Publication Date |
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| CN202824897U true CN202824897U (en) | 2013-03-27 |
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| CN201220496014.3U Expired - Fee Related CN202824897U (en) | 2012-09-26 | 2012-09-26 | Improved electrical process machine pulsed power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106466747A (en) * | 2016-12-12 | 2017-03-01 | 上海东熠数控科技有限公司 | Discharge processing power source |
| CN107775127A (en) * | 2016-08-31 | 2018-03-09 | 山东豪迈机械科技股份有限公司 | Electrical discharge machining pulse power and its control method |
| CN108422055A (en) * | 2017-02-13 | 2018-08-21 | 北京机床所精密机电有限公司 | A kind of waveform controlling method of spark pulse power and the electric power outputting current |
-
2012
- 2012-09-26 CN CN201220496014.3U patent/CN202824897U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107775127A (en) * | 2016-08-31 | 2018-03-09 | 山东豪迈机械科技股份有限公司 | Electrical discharge machining pulse power and its control method |
| CN107775127B (en) * | 2016-08-31 | 2019-11-19 | 山东豪迈机械科技股份有限公司 | Electrical discharge machining pulse power and its control method |
| CN106466747A (en) * | 2016-12-12 | 2017-03-01 | 上海东熠数控科技有限公司 | Discharge processing power source |
| CN106466747B (en) * | 2016-12-12 | 2018-08-31 | 上海东熠数控科技有限公司 | Discharge processing power source |
| CN108422055A (en) * | 2017-02-13 | 2018-08-21 | 北京机床所精密机电有限公司 | A kind of waveform controlling method of spark pulse power and the electric power outputting current |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20210926 |
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| CF01 | Termination of patent right due to non-payment of annual fee |