CN1259167C - High-and low-voltage combining method and device for pulsive power supply used in electric processing - Google Patents
High-and low-voltage combining method and device for pulsive power supply used in electric processing Download PDFInfo
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- CN1259167C CN1259167C CN 01129578 CN01129578A CN1259167C CN 1259167 C CN1259167 C CN 1259167C CN 01129578 CN01129578 CN 01129578 CN 01129578 A CN01129578 A CN 01129578A CN 1259167 C CN1259167 C CN 1259167C
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Abstract
The present invention relates to a high voltage and low voltage combined power supply method and a device thereof for a pulse power source which can be applied to electric machining. A first power supply and a second power supply respectively provide breakdown voltage and working voltage for pulses of electric machining, a high-frequency power electronic switch combines the voltage provided by the first power supply and the second power supply into electric machining pulses and outputs the electric machining pulses to a machining electrode and a workpiece; a high voltage and low voltage combined power supply mode is utilized to provide the power supply for the machining electrode and the workpiece, a traditional industrial frequency transformer, a rectifier and a filter are replaced by a high-frequency switch power supply, and thus, a high power current-limiting resistor is saved, the electric energy is saved, the consumption is reduced, heat generation is reduced, and the manufacturing cost of electric machining devices is lowered.
Description
Technical field
The present invention relates to a kind of method and device thereof of electric machining pulse power high-low pressure associating power supply, be meant especially a kind of utilize high-low pressure associating power supply power supply replace traditional power supply and current-limiting resistance, in order to reduce the electric machining current supply loss, to improve the method and the device thereof of the electric machining pulse power high-low pressure associating power supply of power supplying efficiency, belong to technical field of electronic equipment.
Background technology
As shown in Figure 1, it is the pulse voltage waveform in electrical spark working man-hour and current waveform correspondingly.This voltage waveform and current waveform all can be divided into two parts.First is for puncturing the little electric current high-pressure section of machining gap, and its effect is the dielectric between incipient stage puncture machined electrode that applies the processing pulse and workpiece, and this voltage is 200-300V; Electric current correspondingly is several amperes.Second portion is the working portion of low-voltage for breakdown voltage and breakdown current and high electric current, and this voltage is 20-50V; Electric current correspondingly is tens of to hundreds of amperes.
As shown in Figure 2, it is the pulse power supply circuit schematic diagram of existing electric spark machine tool.It comprises: Industrial Frequency Transformer T, rectifier bridge D, wave filter (adopting the pi type filter of being made up of inductance L, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4 in this circuit), current-limiting resistance R, power electronic switching 1, machined electrode 2 and workpiece 3.Wherein: form power supply by Industrial Frequency Transformer T, rectifier bridge D, wave filter, be connected to the two ends of power supply after current-limiting resistance R, power electronic switching 1, machined electrode 2 and workpiece 3 series connection, machined electrode 2 and workpiece 3 are placed among the processing electrolyte, and remain with the gap, it is (not shown in the figures that the control end of power electronic switching 1 is connected to the drive circuit of exporting pulse drive signal, this drive circuit can adopt commercially available function generator) output, by the conducting or the shutoff of this drive circuit control power electronic switching 1.
Can know by Fig. 1 and Fig. 2: after applying the processing pulse, when the voltage that is applied sharply is reduced to operating voltage by higher breakdown voltage, a large amount of electrical power all consumes on current-limiting resistance, therefore, this resistance is necessary for high-power resistance, this has increased the manufacturing cost of electromachining equipment, and needs to use electric fan to lower the temperature by force for it.And use further consumed power of electric fan.In addition, voltage height, the electric current of the output of the transformer of prior art are big, and electrician's loss is inevitable, and therefore, prior art is not only wasted electric energy in a large number, and return heating in large quantities, cause the rising of environment temperature.
Because aforesaid the deficiencies in the prior art and defective, main purpose of the present invention is the method and the device thereof of electric machining pulse power high-low pressure associating power supply, utilize the mode of high-low pressure associating power supply to provide power supply in the different stages to machined electrode and workpiece respectively, thereby the saving electric energy reduces the wastage.
Summary of the invention
Another object of the present invention is to provide a kind of method and device thereof of electric machining pulse power high-low pressure associating power supply, utilize high frequency switch power to substitute traditional Industrial Frequency Transformer, rectifier, wave filter, thereby save powerful current-limiting resistance, when reducing heating, reduce the manufacturing cost of electromachining equipment.
The objective of the invention is to realize by the following technical solutions:
A kind of method of electric machining pulse power high-low pressure associating power supply, the power supply of this electric machining pulse power comprises first power supply, second power supply, current-limiting resistance, high frequency power electronic switch at least; This first power supply provides the breakdown voltage of electric machining pulse; This second power supply provides the operating voltage of electric machining pulse; This high frequency power electronic switch is combined as the voltage that first power supply and second power supply provide the electric machining pulse and outputs to machined electrode and workpiece.
The breakdown voltage of first power supply output is the electric pulse of high voltage, little electric current.
The operating voltage of second power supply output is the electric pulse of low-voltage, big electric current.
Described first power supply is dc source or high frequency switch power.
Described second power supply is dc source or high frequency switch power.
The breakdown voltage of described electric machining pulse is higher than the operating voltage of electric machining pulse.
A kind of device of electric machining pulse power high-low pressure associating power supply, this device comprises first power supply, second power supply, current-limiting resistance and high frequency power electronic switch at least, this first power supply is connected with same input power supply with second power supply, the output of this first power supply and second power supply is connected to the input of high frequency power electronic switch respectively through current-limiting resistance, the output of this high frequency power electronic switch is connected to machined electrode.
Described high frequency power electronic switch comprises one or more power field effect transistor and one or more power isolated-gate FET, the input of this power field effect transistor is connected with the output of first power supply, and the input of this power isolated-gate FET is connected with the output of second power supply; The output of the output of power field effect transistor and power isolated-gate FET is connected to the output that assembled pulse is provided to machined electrode.
Described first power supply is dc source or high frequency switch power.
Described second power supply is dc source or high frequency switch power.
The voltage of first power supply output is breakdown voltage, and the voltage of second power supply output is operating voltage, and this breakdown voltage is higher than operating voltage.
The present invention utilizes the mode of high-low pressure associating power supply to provide power supply in the different stages to machined electrode and workpiece respectively, simultaneously, utilize high frequency switch power to substitute traditional Industrial Frequency Transformer, rectifier and wave filter, thereby saved powerful current-limiting resistance, reached the purpose of saving electric energy, reducing the wastage, reducing heating, simultaneously, also reduced the manufacturing cost of electromachining equipment.
The present invention is described in further detail below in conjunction with accompanying drawing and specific embodiment.
Description of drawings
Fig. 1 is pulse voltage, the current waveform schematic diagram of spark machined.
Fig. 2 is the pulse power supply circuit schematic diagram of existing electric spark machine tool.
Fig. 3 is circuit theory diagrams of the present invention.
Fig. 4 is the high frequency power electronic switching circuit schematic diagram of one embodiment of the invention.
Fig. 5 is an embodiment of the invention one drive circuit schematic diagram.
The specific embodiment
As shown in Figure 3, power supply of the present invention comprises the first power supply P1, the second power supply P2, current-limiting resistance RX1, RX2, high frequency power electronic switch K; This first power supply P1 provides the breakdown voltage of electric machining pulse; This second power supply P2 provides the operating voltage of electric machining pulse; This high frequency power electronic switch is combined as the voltage that the first power supply P1 and the second power supply P2 provide the electric machining pulse and outputs to machined electrode 2 and workpiece 3; Wherein, the first power supply P1 and the second power supply P2 are high frequency switch power.The operating voltage of the electric machining pulse that is provided by the second power supply P2 is provided the breakdown voltage of the electric machining pulse that is provided by the first power supply P1.
In the initial moment of the electric machining pulse that applies to machined electrode, will output to machined electrode 2 and workpiece 3 by the breakdown voltage that the first power supply P1 provides by high frequency power electronic switch K; After the electrolyte in the gap between machined electrode 2 and workpiece 3 is breakdown, the operating voltage that high frequency power electronic switch K output is provided by the second power supply P2, because the front and back that the electrolyte in the gap is ionized between machined electrode 2 and workpiece 3 apply different voltage respectively, avoided the high electric energy loss of appearance when electrolyte is ionized in the conventional method thus, utilize the mode of this high-low pressure associating power supply to provide power supply in the different stages to machined electrode and workpiece respectively, substituted traditional Industrial Frequency Transformer, rectifier, wave filter, thereby save powerful current-limiting resistance, when reducing heating, reduced the manufacturing cost of electromachining equipment.
As shown in Figure 4, one embodiment of the invention comprise: the first power supply P1, the second power supply P2, current-limiting resistance RX1, RX2 and high frequency power electronic switch K, this the first power supply P1 and the second power supply P2 are connected on the mains-supplied power supply jointly, the output of this first power supply P1 and the second power supply P2 is connected to the input of high frequency power electronic switch K respectively through current-limiting resistance RX1, RX2, the output of this high frequency power electronic switch is connected to machined electrode 2.
High frequency power electronic switch K recited above comprises power field effect transistor T1 and power isolated-gate FET T2, the input of this power field effect transistor T1 is connected with the output of the first power supply P1 through current-limiting resistance RX1, and the input of this power isolated-gate FET T2 is connected with the output of the second power supply P2 through current-limiting resistance RX2; The output of the output of power field effect transistor T1 and power isolated-gate FET T2 links together, and provides assembled pulse to machined electrode 2 jointly then.Because the conducting speed of power field effect transistor T1 is fast, so, forward position in the electric machining pulse, this power field effect transistor T1 powers to machined electrode earlier, after electrolyte punctures, power isolated-gate FET T2 conducting, because the conducting internal resistance of power isolated-gate FET T2 is far smaller than the internal resistance of power field effect transistor T1, so, the electric current of electric machining this power isolated-gate FET T2 that mainly flows through, therefore, the electric current that flows through current-limiting resistance RX1 is also very little, thereby make that the power consumption on the current-limiting resistance RX1 is very little, the power of current-limiting resistance RX1 is also very little simultaneously.
The first power supply P1 recited above and the second power supply P2 are high frequency switch power; And the voltage of first power supply P1 output is breakdown voltage, and the voltage of second power supply P2 output is operating voltage, and this breakdown voltage is 200-300V, and this operating voltage is 20-60V.
As shown in Figure 5, present embodiment also comprises one drive circuit 7, (this function generator can adopt general commercially available prod by function generator in the input input of this drive circuit 7, the function generator that is adopted is that commercially available model is the function generator of GFG-8091G in the present embodiment) pulse signal that produces, this pulse signal process is by reverser IC1, IC2, behind the main pulse control loop that time delay resistance RY1 and delay capacitor CY1 form, output one has the main pulse control signal in preceding dead band with respect to the input pulse rising edge, conducting or the shutoff of this main pulse control signal control high frequency power electronic switch K make the two ends of machined electrode 2 and workpiece 3 obtain processing power supply pulse; Simultaneously, after the pulse signal by the function generator generation of drive circuit 7 inputs input passes through the elimination ionization control loop of being made up of reverser IC5, IC3, IC4, time delay resistance RY2 and delay capacitor CY2, output one has the elimination ionization control signal in back dead band with respect to the input pulse trailing edge, this eliminates the conducting or the shutoff of ionization control signal control synchro switch 6, make two terminal shortcircuits of machined electrode 2 and workpiece 3, thereby reach the effect of quick elimination ionization.Because the main pulse control signal has preceding dead band with respect to input signal, eliminate the ionization control signal and have back dead band with respect to input signal, therefore, guaranteed that high frequency power electronic switch K closes to have no progeny synchro switch 6 ability conductings; Otherwise before the high frequency power electronic switch K conducting, synchro switch 6 definitely turn-offs; Thereby prevented power supply short circuit.
Claims (11)
1, a kind of method of electric machining pulse power high-low pressure associating power supply, it is characterized in that: the power supply of this electric machining pulse power comprises first power supply, second power supply, current-limiting resistance, high frequency power electronic switch at least; This first power supply provides the breakdown voltage of electric machining pulse; This second power supply provides the operating voltage of electric machining pulse; This high frequency power electronic switch is combined as the voltage that first power supply and second power supply provide the electric machining pulse and outputs to machined electrode and workpiece.
2, according to the method for the electric machining pulse power high-low pressure associating power supply of claim 1, it is characterized in that: the breakdown voltage of first power supply output is the electric pulse of high voltage, little electric current.
3, according to the method for the electric machining pulse power high-low pressure associating power supply of claim 1, it is characterized in that: the operating voltage of second power supply output is the electric pulse of low-voltage, big electric current.
4, according to the method for the electric machining pulse power high-low pressure associating power supply of claim 1 or 2, it is characterized in that: described first power supply is dc source or high frequency switch power.
5, according to the method for the electric machining pulse power high-low pressure associating power supply of claim 1 or 3, it is characterized in that: described second power supply is dc source or high frequency switch power.
6, according to the method for the electric machining pulse power high-low pressure associating power supply of claim 1, it is characterized in that: the breakdown voltage of described electric machining pulse is higher than the operating voltage of electric machining pulse.
7, a kind of device of electric machining pulse power high-low pressure associating power supply, it is characterized in that: this device comprises first power supply, second power supply, current-limiting resistance and high frequency power electronic switch at least, this first power supply is connected with same input power supply with second power supply, the output of this first power supply and second power supply is connected to the input of high frequency power electronic switch respectively through current-limiting resistance, the output of this high frequency power electronic switch is connected to machined electrode.
8, according to the device of the electric machining pulse power high-low pressure associating power supply of claim 7, it is characterized in that: described high frequency power electronic switch comprises one or more power field effect transistor and one or more power isolated-gate FET, the input of this power field effect transistor is connected with the output of first power supply, and the input of this power isolated-gate FET is connected with the output of second power supply; The output of the output of power field effect transistor and power isolated-gate FET is connected to the output that assembled pulse is provided to machined electrode.
9, according to the device of the electric machining pulse power high-low pressure associating power supply of claim 7 or 8, it is characterized in that: described first power supply is dc source or high frequency switch power.
10, according to the device of the electric machining pulse power high-low pressure associating power supply of claim 7 or 8, it is characterized in that: described second power supply is dc source or high frequency switch power.
11, according to the device of the electric machining pulse power high-low pressure associating power supply of claim 7, it is characterized in that: the voltage of first power supply output is breakdown voltage, and the voltage of second power supply output is operating voltage, and this breakdown voltage is higher than operating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01129578 CN1259167C (en) | 2001-06-28 | 2001-06-28 | High-and low-voltage combining method and device for pulsive power supply used in electric processing |
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|---|---|---|---|
| CN 01129578 CN1259167C (en) | 2001-06-28 | 2001-06-28 | High-and low-voltage combining method and device for pulsive power supply used in electric processing |
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| CN1393315A CN1393315A (en) | 2003-01-29 |
| CN1259167C true CN1259167C (en) | 2006-06-14 |
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| CN 01129578 Expired - Fee Related CN1259167C (en) | 2001-06-28 | 2001-06-28 | High-and low-voltage combining method and device for pulsive power supply used in electric processing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318241B (en) * | 2008-04-08 | 2010-04-07 | 哈尔滨工业大学 | Impulsing power source for spark pinhole processing |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817399B (en) * | 2014-02-20 | 2016-08-17 | 河南科技大学 | Multiple-pulse digital control type electric spark deposition built-up welding power supply |
| CN107052482A (en) * | 2017-03-31 | 2017-08-18 | 广东商鼎智能设备有限公司 | Spark-erosion machine tool hardboard and spark-erosion machine tool control system |
| CN110091013B (en) * | 2018-01-29 | 2021-01-29 | 上海东熠数控科技有限公司 | Electric spark circuit and electric spark machining device |
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2001
- 2001-06-28 CN CN 01129578 patent/CN1259167C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318241B (en) * | 2008-04-08 | 2010-04-07 | 哈尔滨工业大学 | Impulsing power source for spark pinhole processing |
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| CN1393315A (en) | 2003-01-29 |
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