CN102909444A - Pulsed power supply with parallel high-energy capacitors for electrosparking - Google Patents
Pulsed power supply with parallel high-energy capacitors for electrosparking Download PDFInfo
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- CN102909444A CN102909444A CN2012103919907A CN201210391990A CN102909444A CN 102909444 A CN102909444 A CN 102909444A CN 2012103919907 A CN2012103919907 A CN 2012103919907A CN 201210391990 A CN201210391990 A CN 201210391990A CN 102909444 A CN102909444 A CN 102909444A
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Abstract
The invention relates to a pulsed power supply for electrosparking in the machining field, in particular to a pulsed power supply with parallel high-energy capacitors for the electrosparking. The power supply comprises a rectification circuit (1), a power factor correction circuit (2), a voltage regulator circuit (3), a high-energy capacitor charge and discharge circuit (4), a voltage and current detection circuit (6), a machining control module circuit (7) and a PWM (Pulse-Width Modulation) control circuit (8). The pulsed power supply can provide approximately 150 V no-load breakdown voltages and 100-500 J discharge energy for an electrical discharge machining gap (5) in a single discharge process. The power supply adopts an accumulator structure, the parallel large-capacity capacitors are charged and discharged independently; the high energy stored in the capacitors is directly released to a discharge gap without passing through a current-limiting resistor, so that high instantaneous discharge energy and a strong discharge explosive force can be achieved; the power supply is applicable to difficult-to-machine materials such as ceramics and polycrystalline diamonds in the machining engineering; the current-limiting resistor with serious energy consumption is removed thoroughly; and the utilization rate of electrical energy can be increased by 2-3 times.
Description
Technical field
The present invention relates to the electric spark working pulse power source in a kind of field of machining.
Background technology
The pulse power is an important component part in the EDM System, and the height of its performance directly affects speed, precision, efficient, stability and the reliability etc. of spark machined.The electric spark working pulse power source kind is a lot, the tradition pulse power is series limiting resistor in the discharge major loop, so that the utilization rate of electrical of the pulse power is lower than 25%, nearly 75% electric energy with the form consumption of heat on current-limiting resistance, both reduced utilization rate of electrical, again the cooling system of power supply and the service behaviour of electronic devices and components had been had higher requirement.Along with the development of Power Electronic Technique and the appearance of high power device, the scientific worker improves topological structure and the control strategy of traditional electric spark working pulse power source major loop both at home and abroad, contravariant, high-low pressure combined type, two-layer configuration current mode and mode of resonance isopulse power supply have been developed, replace the resistance current limliting with inductance, capacitance current-limiting, replace Industrial Frequency Transformer with high-frequency pulse transformer, make the utilization rate of electrical of the pulse power obtain larger raising.
The difficult-to-machine material such as engineering ceramics, polycrystalline diamond mostly relies on inner conductive network to come delivered current carrying out electrical spark working man-hour, have poorly conductive, the characteristics such as fusing point is high and thermal conductivity is good, adopt common spark pulse power hardness ag(e)ing rate low, energy consumption is high, Uniform discharge is poor, processing effect is difficult to reach instructions for use, so this class difficult-to-machine material is carrying out the special-purpose pulse power of electrical spark working needs in man-hour.
Summary of the invention
The object of the present invention is to provide a kind of parallel high-energy electric capacity electric spark working pulse power source, power acquisition independently discharges and recharges separately with accumulator structure and parallel multiplex large bulk capacitance, the high-energy that electric capacity stores directly is released to discharging gap without current-limiting resistance, can produce high instantaneous discharge energy and strong discharge with explosion, be applicable to the difficult-to-machine materials such as process engineering pottery, polycrystalline diamond, completely abolished the serious current-limiting resistance that consumes energy, utilization rate of electrical has obtained increasing substantially.
Principle of the present invention is: the high-energy electric capacity electric spark working pulse power source in parallel of inventing mainly is comprised of rectification circuit 1, circuit of power factor correction 2, voltage regulator circuit 3, high-energy capacitor charge and discharge circuit 4, voltage and current detection circuit 6, machining control modular circuit 7, pwm control circuit 8 etc.Spark discharge adds man-hour this pulse power and links to each other with workpiece with instrument, and electric discharge removal adds man-hour needed energy to be provided by high-energy capacitor charge and discharge circuit 4; Voltage and current detection circuit 6 send detected voltage, current signal to machining control modular circuit 7; Machining control modular circuit 7 is being carried out on the basis of analyzing and processing received voltage, current signal, and a road direction high-energy capacitor charge and discharge circuit 4 transmits control signal control gate pole cut-off crystal brake tube (Q
6, Q
7, Q
8, Q
9) open the shutoff order, another road direction pwm control circuit 8 transmits control signal, pwm control circuit 8 is according to received machining control modular circuit 7 and the signal of voltage regulator circuit 3, come to send corresponding control command to voltage regulator circuit 3, make the suitable voltage of voltage regulator circuit 3 outputs to high-energy capacitor charge and discharge circuit 4.
A work period of high-energy electric capacity electric spark working pulse power source in parallel of inventing can be divided into four-stage: (1) electric capacity (C
5) discharge, electric capacity (C
4) charging: machining control modular circuit 7 is sent control signal, at first shutoff door pole cut-off crystal brake tube (Q
7), make electric capacity (C
5) disconnect with voltage regulator circuit 3, then open gate level turn-off thyristor (Q
9), electric capacity (C
5) in the energy of storage be discharged into rapidly in the electro discharge machining gapping place 5 shutoff door pole cut-off crystal brake tube (Q simultaneously
8)And open gate level turn-off thyristor (Q
6), make 3 couples of electric capacity (C of voltage regulator circuit
4) charge; (2) electric capacity (C
5) discharge off, electric capacity (C
4) continue to charge: electric capacity (C
5) in the energy of storage to be discharged into electro discharge machining gapping place complete, voltage and current detection circuit 6 send voltage, the current signal that detects to machining control modular circuit 7, machining control modular circuit 7 is sent control signal, shutoff door pole cut-off crystal brake tube (Q
9), machining gap carries out deionization, at this moment gate level turn-off thyristor (Q
6) continue to open and be electric capacity (C
4) charging, electric capacity (C
4) in energy continue to increase gate level turn-off thyristor (Q
7, Q
8) be continuously off state; (3) electric capacity (C
4) discharge, electric capacity (C
5) charging: electric capacity (C
4) charging complete, electro discharge machining gapping place 5 abundant deionizations, machining control modular circuit 7 is sent control signal, shutoff door pole cut-off crystal brake tube (Q
6), electric capacity (C4) and voltage regulator circuit 3 are disconnected, then open gate level turn-off thyristor (Q
8), the energy of storage is discharged into rapidly in the electro discharge machining gapping place 5 in the electric capacity (C4), opens simultaneously gate level turn-off thyristor (Q7), makes 4 couples of electric capacity (C of accumulator
5) charge gate level turn-off thyristor (Q
9) be continuously off state; (4) electric capacity (C
4) discharge off, electric capacity (C
5) continue to charge: electric capacity (C
4) in the energy of storage to be discharged into electro discharge machining gapping place complete, voltage and current detection circuit 6 send voltage, the current signal that detects to machining control modular circuit 7, machining control modular circuit 7 is sent control signal, shutoff door pole cut-off crystal brake tube (Q
8), machining gap carries out deionization, at this moment gate level turn-off thyristor (Q
7) continue to open and be electric capacity (C
5) charging, electric capacity (C
5) in energy continue to increase gate level turn-off thyristor (Q
6, Q
9) be continuously off state.Next stage capacitor C
5Discharge capacity C
4Charging, power supply enter the next work period, go on so circularly, and the pulse power of the present invention has just been realized charge and discharge capacitance (C
4, C
5) in the storage high-energy be directly released in the machining gap without current-limiting resistance, produce high instantaneous discharge energy and strong discharge with explosion, and cancelled the current-limiting resistance in traditional spark pulse power, realized preferably the purpose of energy-efficient discharge difficult processing rapidoprint.
The present invention compares with electric spark working pulse power source commonly used at present has following advantage:
1. the high-energy of storing in the charge and discharge capacitance directly is released to discharging gap without current-limiting resistance, can produce high instantaneous discharge energy and strong discharge with explosion, and during the difficult-to-machine materials such as process engineering pottery and polycrystalline diamond, efficient can improve 3-5 doubly.
2. cancelled the serious current-limiting resistance that consumes energy, utilization rate of electrical can improve 2-3 doubly.
3. employing PFC can reduce harmonic pollution.
4. owing to the high-power current-limiting resistance of having cancelled in traditional spark pulse power, therefore effectively reduce the influence because of electronic devices and components in the resistance heating paired pulses power supply, improved the functional reliability of the pulse power.
5. preferably Electro Magnetic Compatibility is arranged.
Description of drawings
Fig. 1 is high-energy electric capacity electric spark working pulse power source composition frame chart in parallel of the present invention.
Fig. 2 is the electrical block diagram of high-energy electric capacity electric spark working pulse power source in parallel of the present invention.
Designation among the upper figure:
Q
1~ Q
5Be power switch component, T
1Be high-frequency pulse transformer, D
1~ D
4Be diode, L
1, L
2Be inductance, C
1, C
2Be electrochemical capacitor, C
4, C
5Be large capacity charge and discharge capacitance, Q
6~ Q
9Be gate level turn-off thyristor.
Specific embodiments
Referring to Fig. 1.High-energy electric capacity electric spark working pulse power source in parallel of the present invention comprises rectification circuit 1, circuit of power factor correction 2, voltage regulator circuit 3, high-energy capacitor charge and discharge circuit 4, voltage and current detection circuit 6, machining control modular circuit 7, pwm control circuit 8.Rectification circuit 1 becomes direct current to alternating current, flows to circuit of power factor correction 2, carries out PFC; Direct voltage output after the correction is to voltage regulator circuit 3; The automatic regulation voltage of control command that voltage regulator circuit 3 sends according to pwm control circuit 8, and flow to high-energy capacitor charge and discharge circuit 4; High-energy capacitor charge and discharge circuit 4 provides high discharge energy according to the control signal that machining control modular circuit 7 sends to electro discharge machining gapping place 5, is used for the ablation workpiece material; Voltage and current detection circuit 6 gather the voltage and current signal of discharging gap, flow to machining control modular circuit 7; Machining control modular circuit 7 transmits control signal to high-energy capacitor charge and discharge circuit 4 and pwm control circuit 8 respectively on the basis of received voltage, current signal being carried out analyzing and processing; Pwm control circuit 8 is adjusted the dutycycle of its output pulse according to received machining control modular circuit 7 and the signal of voltage regulator circuit 3, and then makes the suitable voltage of voltage regulator circuit 3 outputs.
Referring to Fig. 2.In the circuit of high-energy electric capacity electric spark working pulse power source in parallel of the present invention, inductance L
1, power switch component Q
1, diode D
1, capacitor C
1Form circuit of power factor correction 2 with pfc controller, the direct current after the rectification is carried out PFC, to reduce the harmonic pollution to electrical network.Power switch component Q
2, Q
3, Q
4, Q
5Consist of full-bridge inverter, this full-bridge inverter produces the high-frequency ac square wave under the control signal effect that pwm control circuit 8 sends, and sends high-frequency pulse transformer T to
1Primary edge, at high-frequency pulse transformer T
1Secondary side produce frequency, phase place is identical, the high-frequency ac square wave that amplitude reduces, and send D to
2, D
3Consist of full-wave rectifying circuit, this full-wave rectifying circuit converts the high-frequency ac square wave to the high-frequency direct-current square wave, flows to by inductance L
2Filter circuit with capacitor C 2 consists of becomes direct current to the high-frequency direct-current square wave by this filter circuit, capacitor C
2Be jumbo storage capacitor, therefore more stored energy is in capacitor C
2In, diode D
4Continuous current circuit is provided.Gate level turn-off thyristor Q
6, Q
7, Q
8, Q
9According to the in certain sequence conducting of control command that machining control modular circuit 7 sends, capacitor C
4, C
5Charging and discharging in turn, capacitor C during discharge
4, C
5The middle energy of storing directly is released to discharging gap, produces high instantaneous discharge energy and strong discharge with explosion and comes the ablation workpiece material.Voltage detecting circuit 9 is parallel to electro discharge machining gapping place 5 two ends that are comprised of instrument and workpiece, gathers the discharge voltage signal, sends machining control modular circuit 7 to; Current detection circuit 10 is series in the discharge major loop, gathers the discharge current signal, sends machining control modular circuit 7 to; Pfc controller 11 is by power ratio control switch element Q
1Open and turn-off, make input current follow the variation of input voltage, improve power factor.。
Claims (2)
1. high-energy electric capacity electric spark working pulse power source in parallel, it comprises rectification circuit (1), circuit of power factor correction (2), voltage regulator circuit (3), high-energy capacitor charge and discharge circuit (4), voltage and current detection circuit (6), machining control modular circuit (7), pwm control circuit (8), it is characterized in that: voltage regulator circuit (3) is by power switch component (Q
2, Q
3, Q
4, Q
5), high-frequency pulse transformer (T
1), diode (D
2, D
3), fly-wheel diode (D
4), inductance (L
2) and storage capacitor (C
2) form, high-energy capacitor charge and discharge circuit (4) is by gate level turn-off thyristor (Q
6, Q
7, Q
8, Q
9), charge and discharge capacitance (C
4, C
5) form; Power switch component (Q
2, Q
3, Q
4, Q
5) consist of full-bridge inverter, this full-bridge inverter under the control signal effect that pwm control circuit (8) sends to high-frequency pulse transformer (T
1) primary edge carry high-frequency pulse voltage, diode (D
2, D3) consist of full-wave rectification and be connected in transformer (T
1) secondary side, (D
4) be fly-wheel diode, (L
2) be filter inductance, (C
2) be storage capacitor, be charge and discharge capacitance (C
4, C
5) energy, gate level turn-off thyristor (Q be provided
6, Q
7, Q
8, Q
9) the in certain sequence conducting of control command that sends according to machining control modular circuit (7), charge and discharge capacitance (C
4, C
5) charging and discharging in turn, the energy that stores in the electric capacity during discharge directly is released to discharging gap without current-limiting resistance.
2. high-energy electric capacity electric spark working pulse power source in parallel as claimed in claim 1, it is characterized in that: rectification circuit (1) output dc voltage is to circuit of power factor correction (2), through exporting to voltage regulator circuit (3) after the PFC, the automatic regulation output voltage of control command that voltage regulator circuit (3) sends according to pwm control circuit (8) is to high-energy capacitor charge and discharge circuit (4), high-energy capacitor charge and discharge circuit (4) under the control command effect that machining control modular circuit (7) sends, receive and stored voltage regulating circuit (3) in energy, and be transported to electro discharge machining gapping place (5), voltage and current detection circuit (6) gather the voltage and current signal of discharging gap, flow to machining control modular circuit (7), machining control modular circuit (7) is to received voltage, current signal carries out transmitting control signal to pwm control circuit (8) and high-energy capacitor charge and discharge circuit (4) respectively on the basis of analyzing and processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210391990.7A CN102909444B (en) | 2012-10-16 | 2012-10-16 | Pulsed power supply with parallel high-energy capacitors for electrosparking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210391990.7A CN102909444B (en) | 2012-10-16 | 2012-10-16 | Pulsed power supply with parallel high-energy capacitors for electrosparking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102909444A true CN102909444A (en) | 2013-02-06 |
| CN102909444B CN102909444B (en) | 2015-02-18 |
Family
ID=47608155
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210391990.7A Active CN102909444B (en) | 2012-10-16 | 2012-10-16 | Pulsed power supply with parallel high-energy capacitors for electrosparking |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364231A (en) * | 2014-08-20 | 2016-03-02 | 阿杰·查米莱斯股份有限公司 | Method and impulse form device for spark erosion machining |
| CN107052481A (en) * | 2017-03-09 | 2017-08-18 | 中国工程物理研究院机械制造工艺研究所 | A kind of high frequency of multi-channel parallel cross-circulation driving is micro- can the electric machining pulse power |
| CN107276405A (en) * | 2017-05-27 | 2017-10-20 | 南京理工大学 | The fine electric spark pulse power and the Discrete control method based on the power supply |
| CN111146967A (en) * | 2019-12-25 | 2020-05-12 | 兰州空间技术物理研究所 | High-reliability surface breakdown discharge trigger type pulse arc striking power supply |
| CN111293921A (en) * | 2019-12-30 | 2020-06-16 | 南京理工大学 | Adjustable RC (resistor-capacitor) micro pulse power supply based on three-way capacitor staggered discharge |
| CN112378995A (en) * | 2021-01-14 | 2021-02-19 | 矿冶科技集团有限公司 | Electric spark generating device, energy testing device and electric spark generating system |
| CN115360587A (en) * | 2022-09-16 | 2022-11-18 | 湖南泫坤量化科技有限公司 | Electric spark energy measuring method, device and system |
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| CN1546266A (en) * | 2003-12-17 | 2004-11-17 | 南京航空航天大学 | Resistance proof current flow type energy-saving electric spark processing impulsing power source with two-stage structure |
| CN1772425A (en) * | 2005-10-24 | 2006-05-17 | 中国石油大学(华东) | Voltage-regulating energy saving spark machining pulse power supply |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364231A (en) * | 2014-08-20 | 2016-03-02 | 阿杰·查米莱斯股份有限公司 | Method and impulse form device for spark erosion machining |
| CN105364231B (en) * | 2014-08-20 | 2020-02-14 | 阿杰·查米莱斯股份有限公司 | Method and pulse forming apparatus for electric discharge machining |
| CN107052481A (en) * | 2017-03-09 | 2017-08-18 | 中国工程物理研究院机械制造工艺研究所 | A kind of high frequency of multi-channel parallel cross-circulation driving is micro- can the electric machining pulse power |
| CN107052481B (en) * | 2017-03-09 | 2019-08-09 | 中国工程物理研究院机械制造工艺研究所 | A kind of high frequency of multi-channel parallel cross-circulation driving is micro- can the electric machining pulse power |
| CN107276405A (en) * | 2017-05-27 | 2017-10-20 | 南京理工大学 | The fine electric spark pulse power and the Discrete control method based on the power supply |
| CN111146967A (en) * | 2019-12-25 | 2020-05-12 | 兰州空间技术物理研究所 | High-reliability surface breakdown discharge trigger type pulse arc striking power supply |
| CN111146967B (en) * | 2019-12-25 | 2023-08-15 | 兰州空间技术物理研究所 | High-reliability edge surface breakdown discharge trigger type pulse arc striking power supply |
| CN111293921A (en) * | 2019-12-30 | 2020-06-16 | 南京理工大学 | Adjustable RC (resistor-capacitor) micro pulse power supply based on three-way capacitor staggered discharge |
| CN112378995A (en) * | 2021-01-14 | 2021-02-19 | 矿冶科技集团有限公司 | Electric spark generating device, energy testing device and electric spark generating system |
| CN115360587A (en) * | 2022-09-16 | 2022-11-18 | 湖南泫坤量化科技有限公司 | Electric spark energy measuring method, device and system |
| CN115360587B (en) * | 2022-09-16 | 2024-02-06 | 湖南泫坤量化科技有限公司 | Electric spark energy measurement method, device and system |
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