CN107276405A - The fine electric spark pulse power and the Discrete control method based on the power supply - Google Patents
The fine electric spark pulse power and the Discrete control method based on the power supply Download PDFInfo
- Publication number
- CN107276405A CN107276405A CN201710387666.0A CN201710387666A CN107276405A CN 107276405 A CN107276405 A CN 107276405A CN 201710387666 A CN201710387666 A CN 201710387666A CN 107276405 A CN107276405 A CN 107276405A
- Authority
- CN
- China
- Prior art keywords
- voltage
- power
- switching tube
- gap
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
- B23H1/02—Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges
Abstract
The present invention discloses a kind of fine electric spark pulse power, including power factor correcting converter, DC dc converter, loop of power circuit, drive circuit, impulse generator, detection circuit, and wherein loop of power circuit includes 6 switching tube Qp、Q1、Q2、Q3、Q4、QoffWith 1 inductance Llimit, 4 switching tube Q1‑Q4It is connected with bridge architecture, switching tube QpConnect the outlet side of DC dc converter and the input side of full-bridge converter, switching tube QoffAfter in parallel with gap, one end passes through inductance LlimitThe midpoint of one of bridge arm is connected to, the other end is directly connected to the midpoint of another bridge arm.The invention also discloses the Discrete control method based on the power supply.The power supply of the present invention only includes a loop of power circuit, system constitutes simple, small volume, corresponding Discrete control method carries out voltage control and the switching of current control in a set of loop of power circuit, and voltage control and current control are independent mutually, switch and control precise and stable rapidly.
Description
Technical field
The invention belongs to electrical discharge machining pulsed-power industry, more particularly to a kind of fine electric spark pulse power and
Discrete control method based on the power supply.
Background technology
Continuous positive-negative polarity processing can improve the quality of processing, have certain effect in terms of the shaping of electric discharge pit
Really.In order to adapt to a variety of processing occasions, processing conditions requirement, electric spark working pulse power source must possess positive-negative polarity processing
Ability.In order to realize that positive-negative polarity is processed, existing electric spark working pulse power source uses full-bridge converter as loop of power circuit
One or more current-limiting resistances are also needed in main topology, loop of power circuit.Due to the presence of current-limiting resistance so that the pulse power plus
Work is inefficient, it is impossible to meet requirement energy-efficient in micro EDM.
In addition, in edm process, the striking stage needs the pulse power to apply in instrument and piece pole two ends
High voltage, to reach the quick purpose for puncturing gap；And gap it is breakdown after discharge regime, then need the pulse power to provide steady
Fixed controllable processing electric current, to avoid overcurrent phenomenon, reaches satisfied processing effect, therefore micro EDM is to electric discharge
The Discrete control of voltage and current before and after gap breakdown requires very high.
Patent CN102114559B discloses a kind of alternating polarity pulses power supply, and its loop of power circuit includes the first loop of power circuit
With the second loop of power circuit, Discrete control is carried out to voltage and current respectively, is discharging gap particular by the first loop of power circuit
Guide's breakdown voltage is provided, the discharge current for realizing discharge regime after gap breakdown by the second loop of power circuit is controlled.It is this
Two sets of loop of power circuit of composite structured needs, it is complicated, and also there is detection circuit and controller response speed, switching control
The problem of precision processed is not arrogant.
The content of the invention：
Technical problem solved by the invention is to provide a kind of fine electric spark pulse power and point based on the power supply
Section control method, Discrete control, and gap voltage can be carried out in positive-negative polarity process to gap voltage and electric current
Control with electric current is independent mutually, switching is rapid, control effect is precise and stable.
The technical solution for realizing the object of the invention is：A kind of fine electric spark pulse power, including power factor school
Direct transform device, DC-DC converter, loop of power circuit, drive circuit, impulse generator, detection circuit, alternating voltage pass through work(
Rate factor correction converter and DC-DC converter export adjustable dc voltage and powered to loop of power circuit, between loop of power circuit is given
Gap provides positive-negative polarity voltage, the voltage and current feeding impulse generator in detection electric circuit inspection gap, impulse generator output
Control signal, control signal produces the break-make of switching tube in drive signal driving power loop, institute after amplifying through overdrive circuit
Stating loop of power circuit includes 6 switching tube Qp、Q1、Q2、Q3、Q4、QoffWith 1 inductance Llimit, wherein 4 switching tube Q1-Q4With bridge-type
Structure is connected, switching tube QpConnect the outlet side of DC-DC converter and the input side of full-bridge converter, switching tube Qoff
After in parallel with gap, one end passes through inductance LlimitThe midpoint of one of bridge arm is connected to, the other end is directly connected to other one
The midpoint of individual bridge arm.
The impulse generator uses the control framework that DSP and FPFA are collectively formed.
Switching tube selects the power MOS pipe of tri- kinds of different materials of Si, SiC or GaN in the loop of power circuit, is respectively applied to
Roughing, three kinds of electrical discharge machining occasions of semifinishing and microfabrication.
Based on the processing method of the fine electric spark pulse power, comprise the following steps：
Step 1：In a positive polarity process, switching tube QpAnd Q4Remain conducting, Q2And QoffRemain
Shut-off, switching tube Q1、Q3With inductance LlimitConstitute a Buck code converter, impulse generator controlling switch pipe Q1And Q3Alternately
Break-make；In a negative polarity process, switching tube QpAnd Q3Remain conducting, Q1And QoffShut-off is remained, is switched
Pipe Q2、Q4With inductance LlimitConstitute a Buck code converter, impulse generator controlling switch pipe Q2And Q4Alternating break-make；
Step 2：After the completion of process, 4 switching tube Q are disconnected1-Q4, then ON switch pipe Qoff, accelerating gap deionization
Process.
If gap current excessively stream occurs in process, switching tube Q is disconnectedpTerminate processing.
Discrete control method based on the fine electric spark pulse power, comprises the following steps：
Step 1：Process-cycle, voltage and current threshold value are set, the Initialize installation of impulse generator is realized；
Step 2：The analog signal of circuit real-time sampling gap voltage and electric current is detected, carrying out AD by impulse generator turns
After changing, the data signal of gap voltage and electric current is obtained；
Step 3：When a process-cycle starts, impulse generator is according to gap voltage data signal, gap current number
Word signal, voltage threshold and current threshold determine control strategy, if the data signal of gap current is less than current threshold and voltage
Data signal be more than voltage threshold, then carry out voltage control；Otherwise current control is switched to.
The present invention compared with prior art, its remarkable advantage：1) the fine electric spark pulse power of the invention, its power is returned
Current-limiting resistance is replaced using current-limiting inductance in road, processing efficiency is improved.2) the fine electric spark pulse power of the invention, its arteries and veins
The framework that generator uses DSP+FPGA is rushed, the control of system had both been met and had calculated requirement, and in turn ensure that at multi signal logic
Reason ability and actuating speed.3) processing method of the fine electric spark pulse power of the invention, full-bridge converter and Buck are become
Parallel operation is combined, and be may be implemented in a loop of power circuit in positive-negative polarity process and gap voltage and electric current are divided
Section control, simplifies circuit topology, reduces the volume of power-supply system, reduce influence of the parasitic parameter to processing.4) this hair
The Discrete control method of the new fine electric spark pulse power of bright offer, the control of its voltage and current control are feedback closed loop
Control, two kinds of controls are independent mutually, do not interfere with each other, and switching is rapid, is effectively guaranteed the accuracy of control.
Brief description of the drawings
Fig. 1 is the hardware block diagram of the fine electric spark pulse power.
Fig. 2 is the electrical block diagram of the power factor correcting converter of the fine electric spark pulse power.
Fig. 3 is the electrical block diagram of the DC-DC converter of the fine electric spark pulse power.
Fig. 4 is the structural representation of the loop of power circuit of the fine electric spark pulse power.
Fig. 5 is the structural representation of the drive circuit of the fine electric spark pulse power.
Fig. 6 is the structural representation of the detection circuit of the fine electric spark pulse power.
Fig. 7 is each stage schematic diagram in the fine electric spark pulse power process-cycle.
Fig. 8 is the flow chart of Discrete control.
Fig. 9 is voltage-controlled flow chart.
Figure 10 is the flow chart of current control.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
In order to reduce the interference between spark-erosion machine tool system components, the pulse power individually can input power taking from exchange.
The rectification by the way of low-frequency transformer and bridge rectifier power-up hold more than traditional pulse power, the volume of power supply is larger and inputs
Power factor is low.In order to reduce the volume of power supply to reduce influence of the parasitic parameter to processing, and reduce Harmonics of Input
To improve input power factor and power-efficient, the fine electric spark pulse power that the present invention is provided uses one-level work(in input side
Rate factor correction converter.
As shown in figure 1, the fine electric spark pulse power, including power factor correcting converter, DC-DC converter,
Loop of power circuit, drive circuit, impulse generator, detection circuit, alternating voltage is by power factor correcting converter and direct current-straight
Current converter exports adjustable dc voltage and powered to loop of power circuit, and loop of power circuit provides positive-negative polarity voltage, detection electricity to gap
The voltage and current feeding impulse generator of road detector gap, impulse generator output control signal, control signal is through overdriving
The break-make of switching tube in drive signal driving power loop is produced after circuit amplification.As shown in Fig. 2 power number correcting converter is adopted
With crisscross parallel Boost power factors because of correcting converter, including a rectifier bridge and two-way Boost PFCs electricity
Road, power network alternating current does not control full bridge rectifier, the output feeding two-way crisscross parallel of rectification circuit as input feeding is single-phase
Boost circuit of power factor correction, the work of two-way identical Boost circuit of power factor correction crisscross parallel.Switching tube Qpfc1
And Qpfc2Drive signal dutycycle it is equal in magnitude, realize input and output current uniform, double switch pipe Qpfc1And Qpfc2Driving
Signal differs 180 ° of phase, per the half that road power is total power input.
The output voltage of power factor correcting converter is fixed and higher, and the input voltage amplitude of actual pulse power supply is uncommon
Continuously adjustabe is hoped, therefore needs after power factor correcting converter one-level DC-DC converter.
As shown in figure 3, DC-DC converter uses LLC full-bridge controlled resonant converters, switching tube Qdc1-Qdc4Constitute full-bridge
Inverter circuit, Qdc1、Qdc4Using with drive signal, Q all the waydc2、Qdc3Using with drive signal, two-way drive signal duty all the way
Than identical and there is certain dead band.Inductance Lr、LmWith electric capacity CrConstitute series resonant network, transformer T and diode Ddc1, Ddc2
Full-wave rectifying circuit is constituted, electric capacity C is filter capacitor.Resonant capacitance CrThe primary side of transformer is connected on, blocking effect is played, makes
Transformer is not easy saturation.LLC full-bridge converters utilize the resonance of electric capacity and inductance element in circuit, make the electricity at switching tube two ends
Pressure or electric current change in sinusoidal rule for some time in a switch periods, so that all switch tube zeros in converter
Voltage is open-minded, secondary end diode zero-current switching, greatly reduces switching loss, improves power-efficient.
By controlling the output voltage of DC-DC converter to adjust forward and reverse pulse voltage amplitude, direct current-straight
Current converter has the DC voltage of certain adjustable range for providing 100-300V, is used as the input of loop of power circuit.
As shown in figure 4, loop of power circuit includes 6 switching tube Qp、Q1-Q4、QoffWith 1 inductance Llimit.Loop of power circuit is used
It is topological based on full-bridge converter, wherein 4 switching tube Q1-Q4It is connected with bridge architecture, Q1And Q3Opened for above and below a bridge arm two
Guan Guan, Q2And Q4For two switching tubes above and below another bridge arm.Switching tube QpThe outlet side and full-bridge for connecting DC-DC converter become
The input side of parallel operation, switching tube QoffBe connected in parallel on processing workpiece and instrument two ends, the output end of inductance connection full-bridge converter and
Process workpiece.
Switching tube uses the power MOS pipe of tri- kinds of different materials of Si, SiC and GaN in loop of power circuit, is respectively applied to thick add
Work, three kinds of electrical discharge machining occasions of semifinishing and microfabrication.Si metal-oxide-semiconductors are a kind of metal-oxide-semiconductors used earliest, low in
Have a meeting, an audience, etc. well under one's control and close conducting resistance very little, preferably, with the lifting of stress levels, Si metal-oxide-semiconductor conducting resistances are big, high temperature is steady for working characteristics
Qualitative poor, working frequency is low, therefore Si metal-oxide-semiconductors are relatively specific for the roughing occasion not high to operating frequency requirements.SiC
The characteristics of metal-oxide-semiconductor has high blocking voltage, high working frequency and strong heat-resisting ability, while having on state resistance low again and switch
The characteristics of being lost small, is particularly suitable for use in more than 1200V high pressure-temperatures processing occasion, therefore SiC metal-oxide-semiconductors can meet high voltage
Semi-finished requirement is carried out under occasion.GaN metal-oxide-semiconductors employ newest manufacturing process, and switching frequency can reach several MHz,
And because GaN metal-oxide-semiconductor endobiosis electric capacity is small so that very little is lost in devices switch under high-frequency work, therefore GaN metal-oxide-semiconductors are applicable
Occasion is processed in high frequency, therefore GaN metal-oxide-semiconductors can meet the requirement that microfabrication is carried out under high frequency occasion.
The signal of the break-make of 6 switching tubes is controlled to be produced by impulse generator in loop of power circuit, impulse generator is used
The control framework collectively formed by DSP and FPFA.DSP is master control chip in the present invention, and model TMS320F28335 is
A high-performance 32-bit float-point DSP processor of TI companies.FPGA is high speed actuator, and model EP4CE15F23C8 is
The high speed processor of altera corp Cyclone IV series, its clock frequency is up to 472MHz, is equipped with two-way high speed, high accuracy
AD conversion chip is used for the input of sampled signal, and six tunnels high speed, high accuracy DA conversion chips are used for the defeated of pwm control signal
Go out.Integrated real-time communication agreement between DSP and fpga chip.
Because the switch controlled signal driving force that impulse generator is sent is inadequate, the logical of driving switch pipe is not enough to
It is disconnected, therefore drive circuit is needed between impulse generator and power circuit, for entering to the control signal that impulse generator is sent
Row amplification, output certain voltage amplitude meets the drive signal of driving force.
As shown in figure 5, drive circuit drives 6 metal-oxide-semiconductors using 3 identical metal-oxide-semiconductor driving chips, core is each driven
Piece and its external circuit are all identicals, and one of driving chip and its external circuit are as shown in Figure 5.Driving chip uses TI
The UCC27214 chips of company, the ability with high-side driver is highly suitable as the driving chip of switching tube in full-bridge circuit.
Supply voltage VDDPowered using+15V to the pin VDD of chip 7, the control signal PWM1 and PWM2 that impulse generator is sent are sent respectively
The high side for entering chip inputs 1 pin HI and downside 2 pin LI of input, and a bootstrapping electricity is connected between 13 pin HB and 11 pin HS
Hold CBOOT, high side 12 pin HO of output are by the high side drive signal after amplification by resistance RHOSend into high side metal-oxide-semiconductor Q1's
Grid, 11 pin HS connection high side metal-oxide-semiconductors Q1Source electrode, downside export 6 pin LO by after amplification low side driving signal pass through
Resistance RLOSend into downside metal-oxide-semiconductor Q2Grid, 5 pin COM connection downside metal-oxide-semiconductors Q2Source electrode.
Gap voltage and gap current are controlled respectively in the different stages, it is necessary to have accurate detection electricity in real time
Detector gap voltage and current is carried out on road, then the signal detected is sent into impulse generator.
As shown in fig. 6, detection circuit is made up of voltage detecting circuit and current detection circuit, including 1 potentiometer W, 2
Operational amplifier U1And U2And 1 current sensor CS.Potentiometer W one end is connected with instrument, the other end and processing workpiece phase
Even, movable contact and operational amplifier U1In-phase input end be connected, operational amplifier U1Inverting input be connected with output end,
Constitute a voltage follower.Current sensor CS signal detection termination is connected in processing loop, current sensor CS's
Signal output part and operational amplifier U2In-phase input end be connected, operational amplifier U2Inverting input be connected with output end,
Constitute a voltage follower.
Potentiometer W be used for detect processing workpiece and instrument between gap voltage, by movable contact gap voltage press than
Feeding operational amplifier U after example partial pressure1, potentiometer W resistance should choose tens of to hundreds of M Ω so that it is to processing gap
Influence is minimized, in micro EDM, and pulsewidth is very narrow, it is therefore desirable to which voltage detecting circuit (6) can very fast detection
To the change of processing gap voltage, the method detected using voltage disclosure satisfy that the demand of micro EDM.Electric current
Sensor CS uses ACS758LCB-100B-PFF-T models, ambipolar high current signal can be converted into unipolar small electricity
Signal is pressed, accuracy of detection is high, realizes convenient and reliable.
The new spark pulse power provided based on the invention described above, the processing method specific embodiment party that the present invention is provided
Formula is as follows：
In a positive polarity process, switching tube QpAnd Q4Remain conducting, Q2And QoffShut-off is remained, is opened
Close pipe Q1、Q3With inductance LlimitA Buck code converter is constituted, impulse generator is to the gap voltage of sampling and the number of electric current
Word signal, segmentation is carried out after voltage and current control, driving switching tube Q after output pwm control signal amplifies through overdrive circuit1
And Q3Alternating break-make；In a negative polarity process, switching tube QpAnd Q3Remain conducting, Q1And QoffRemain pass
It is disconnected, switching tube Q2、Q4With inductance LlimitConstitute a Buck code converter, gap voltage and electric current of the impulse generator to sampling
Data signal, segmentation carry out voltage and current control after, output pwm control signal amplify through overdrive circuit after driving switch
Pipe Q2And Q4Alternating break-make；
After the completion of process, gap enters the deionization stage, without voltage and current control, impulse generator output
Pwm control signal drives 4 switching tube Q after amplifying through overdrive circuit1-Q4It is all off, driving switch pipe again after of short duration delay
QoffIt is open-minded, the process of accelerating gap deionization.
The new spark pulse power provided based on the invention described above, gap voltage and gap current that the present invention is provided
Discrete control method embodiment it is as follows：
In the processing of the new fine electric spark pulse power in a process-cycle each stage schematic diagram as shown in fig. 7, one
Process-cycle includes process segment and deionization stage, and the process segment includes striking stage and discharge regime, a processing week again
0~t of phase3In period, t at the time of the deionization stage starts2And process-cycle t at the time of terminate3All set
, the switch instant t of striking stage and discharge regime1At the time of being that gap is breakdown, influenceed by gap state and property
Change constantly.In the striking stage, gap is not also breakdown, and gap current very little is almost 0, and gap voltage is set up rapidly simultaneously
Rise, in order to prevent gap voltage from rising the larger overshoot of too fast generation, influence the stability of whole system, it is necessary to gap electricity
Pressure is controlled, and is stabilized it near a steady state value；When gap is breakdown, discharge regime is put into, by backlash characteristics
Influence gap voltage is dropped sharply near a metastable maintenance voltage, and gap current rises rapidly, at this moment immediately will
Voltage control is converted to current control, by gap current stabilization near a steady state value, prevents excessively stream from causing gap shorting, and
And stable electric current can improve the quality of processing.Voltage is controlled and current control is worked independently, do not interfere with each other.
Discrete control main program flow chart in impulse generator main program Initialize installation as shown in figure 8, can set
Process-cycle T1, the cycle T in deionization stage 2, gap voltage set-point vref, gap current set-point iref, gap voltage
Threshold value vth and gap current threshold value ith.Detect circuit by the analog signal vgap of the gap voltage of sampling and gap current and
Igap, is respectively fed to two-way AD conversion chip in impulse generator, obtains the data signal vgapd of gap voltage and gap current
And igapd.When a process-cycle T1 starts, into the process segment, main program judges the data signal vgapd of gap voltage
Whether voltage threshold vth is less than, and whether the data signal igapd of gap current is more than current threshold ith, in main program
Provided with variable nctr, variable nctr is put 1 when Rule of judgment is unsatisfactory for, being now in the striking stage takes voltage control, by electricity
The pwm control signal vpwm feeding high speed D/A conversion chips of voltage-controlled subprogram output；Once Rule of judgment is met, it will become immediately
Amount nctr is set to 0, and is now in discharge regime and is taken current control, the pwm control signal ipwm that current control subprogram is exported
Send into high speed D/A conversion chip.When the deionization stage, T2 started, into the deionization stage, gap voltage set-point vref and
Gap given value of current value iref is set to 0, without voltage control and current control.
Voltage controls subroutine flow chart as shown in figure 9, the data signal vgapd feeding voltages of gap voltage control sub- journey
Sequence, error signal is produced after being compared with gap voltage set-point vref, and the error signal is calculated by PID control program,
Result of calculation is handled by PWM ripples generation program again, and output frequency is fixed, the pwm control signal vpwm of variable duty ratio.
As shown in Figure 10, the data signal igapd feeding current controls of gap current are sub for current control subroutine flow chart
Program, error signal is produced after being compared with gap current set-point iref, and the error signal is counted by PID control program
Calculate, result of calculation is handled by PWM ripples generation program again, and output frequency is fixed, the pwm control signal of variable duty ratio
ipwm。
Determine that voltage control switches to the time of current control, voltage control and electric current by variable nctr state change
Control, which is realized, to be worked independently from each other, and the pwm control signal only corresponded under control model can just be ultimately delivered to DA conversion chips
Output, to control the break-make of respective switch pipe in loop of power circuit (3).
Claims (6)
1. a kind of fine electric spark pulse power, including power factor correcting converter, DC-DC converter, loop of power circuit,
Drive circuit, impulse generator, detection circuit, alternating voltage pass through power factor correcting converter and DC-DC converter
Export adjustable dc voltage to power to loop of power circuit, loop of power circuit is provided between positive-negative polarity voltage, detection electric circuit inspection to gap
The voltage and current feeding impulse generator of gap, impulse generator output control signal, control signal is amplified through overdrive circuit
The break-make of switching tube in drive signal driving power loop is produced afterwards, it is characterised in that the loop of power circuit includes 6 switching tubes
Qp、Q1、Q2、Q3、Q4、QoffWith 1 inductance Llimit, wherein 4 switching tube Q1-Q4It is connected with bridge architecture, switching tube QpConnection
The outlet side of DC-DC converter and the input side of full-bridge converter, switching tube QoffAfter in parallel with gap, one end passes through electricity
Feel LlimitThe midpoint of one of bridge arm is connected to, the other end is directly connected to the midpoint of another bridge arm.
2. the fine electric spark pulse power according to claim 1, it is characterised in that the impulse generator uses DSP
The control framework collectively formed with FPFA.
3. the fine electric spark pulse power according to claim 1, it is characterised in that switching tube is selected in the loop of power circuit
The power MOS pipe of tri- kinds of different materials of Si, SiC or GaN is selected, three kinds of roughing, semifinishing and microfabrication is respectively applied to
Electrical discharge machining occasion.
4. the processing method based on the fine electric spark pulse power described in claim any one of 1-3, it is characterised in that including
Following steps：
Step 1：In a positive polarity process, switching tube QpAnd Q4Remain conducting, Q2And QoffRemain shut-off,
Switching tube Q1、Q3With inductance LlimitConstitute a Buck code converter, impulse generator controlling switch pipe Q1And Q3Alternating break-make；
In a negative polarity process, switching tube QpAnd Q3Remain conducting, Q1And QoffRemain shut-off, switching tube Q2、Q4
With inductance LlimitConstitute a Buck code converter, impulse generator controlling switch pipe Q2And Q4Alternating break-make；
Step 2：After the completion of process, 4 switching tube Q are disconnected1-Q4, then ON switch pipe Qoff, the mistake of accelerating gap deionization
Journey.
5. processing method according to claim 4, it is characterised in that if gap current excessively stream occurs in process,
Then disconnect switching tube QpTerminate processing.
6. the Discrete control method based on the fine electric spark pulse power described in claim any one of 1-3, it is characterised in that
Comprise the following steps：
Step 1：Process-cycle, voltage and current threshold value are set, the Initialize installation of impulse generator is realized；
Step 2：The analog signal of circuit real-time sampling gap voltage and electric current is detected, is AD converted by impulse generator
Afterwards, the data signal of gap voltage and electric current is obtained；
Step 3：When a process-cycle starts, impulse generator is believed according to gap voltage data signal, gap current numeral
Number, the relation between voltage threshold and current threshold determine control strategy, if the data signal of gap current is less than current threshold
And the data signal of voltage is more than voltage threshold, then voltage control is carried out；Otherwise current control is switched to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710387666.0A CN107276405B (en) | 2017-05-27 | 2017-05-27 | The fine electric spark pulse power and Discrete control method based on the power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710387666.0A CN107276405B (en) | 2017-05-27 | 2017-05-27 | The fine electric spark pulse power and Discrete control method based on the power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107276405A true CN107276405A (en) | 2017-10-20 |
| CN107276405B CN107276405B (en) | 2019-06-04 |
Family
ID=60064720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710387666.0A Active CN107276405B (en) | 2017-05-27 | 2017-05-27 | The fine electric spark pulse power and Discrete control method based on the power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107276405B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108380988A (en) * | 2018-01-30 | 2018-08-10 | 南京理工大学 | A kind of WEDM pulse power supply and its control method |
| CN108672858A (en) * | 2018-06-30 | 2018-10-19 | 南京理工大学 | The bipolarity WEDM pulse power supply and processing method of full-bridge crisscross parallel |
| CN110328419A (en) * | 2019-07-22 | 2019-10-15 | 南京理工大学 | No resistive spark pulse power and its processing and clearance discharge condition recognition methods |
| CN110365217A (en) * | 2019-08-12 | 2019-10-22 | 黄山学院 | High power density GaN full-bridge LLC power module |
| CN110380604A (en) * | 2019-08-12 | 2019-10-25 | 无锡派微科技有限公司 | Grid-connected power generation system high pressure wide input range GaN power module |
| CN110445394A (en) * | 2019-08-12 | 2019-11-12 | 黄山市瑞兴汽车电子有限公司 | High efficiency GaN power module for LED car lamp power supply |
| CN110445372A (en) * | 2019-08-12 | 2019-11-12 | 无锡派微科技有限公司 | GaN interleaved parallel PFC power module for wireless charging system |
| CN110856880A (en) * | 2018-08-23 | 2020-03-03 | 株式会社沙迪克 | Mould-carving electric discharge machine |
| CN111193428A (en) * | 2020-01-20 | 2020-05-22 | 南京理工大学 | Micro high-frequency grouping pulse power supply |
| CN111277138A (en) * | 2019-12-31 | 2020-06-12 | 南京理工大学 | Medium-speed wire cutting pulse power supply for processing waist drum problem and processing method thereof |
| CN111431432A (en) * | 2020-01-20 | 2020-07-17 | 南京理工大学 | Fine electric spark pulse power supply based on Boost and RC circuit |
| CN111644718A (en) * | 2019-12-31 | 2020-09-11 | 南京理工大学 | Pulse power supply for smooth machining of medium-speed wire cutting and machining method thereof |
| CN113271030A (en) * | 2021-05-25 | 2021-08-17 | 中国工程物理研究院机械制造工艺研究所 | Pulse generation control method for pulse power supply |
| CN114252681A (en) * | 2021-12-17 | 2022-03-29 | 山东豪迈机械科技股份有限公司 | Electric spark machining gap leakage current detection control circuit and control method thereof |
| CN115070142A (en) * | 2022-06-01 | 2022-09-20 | 南京理工大学 | Novel peak current control method applied to electric spark machining pulse power supply |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058435C (en) * | 1993-06-30 | 2000-11-15 | 三菱电机株式会社 | Electrical discharge machine |
| JP2001326184A (en) * | 2000-05-17 | 2001-11-22 | Seiko Epson Corp | Method for producing semiconductor wafer and plasma cvd system |
| US20030035259A1 (en) * | 2000-02-04 | 2003-02-20 | Anton Mauder | Protection configuration for schottky diode |
| CN102069245A (en) * | 2010-11-08 | 2011-05-25 | 大连理工大学 | Interval type-2 fuzzy logic-based two-order fuzzy control method for micro electrical discharge |
| CN102909444A (en) * | 2012-10-16 | 2013-02-06 | 中国石油大学(华东) | Pulsed power supply with parallel high-energy capacitors for electrosparking |
| JP2014073560A (en) * | 2012-10-05 | 2014-04-24 | Sodick Co Ltd | Wire-cut electric discharge machining device |
-
2017
- 2017-05-27 CN CN201710387666.0A patent/CN107276405B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058435C (en) * | 1993-06-30 | 2000-11-15 | 三菱电机株式会社 | Electrical discharge machine |
| US20030035259A1 (en) * | 2000-02-04 | 2003-02-20 | Anton Mauder | Protection configuration for schottky diode |
| JP2001326184A (en) * | 2000-05-17 | 2001-11-22 | Seiko Epson Corp | Method for producing semiconductor wafer and plasma cvd system |
| CN102069245A (en) * | 2010-11-08 | 2011-05-25 | 大连理工大学 | Interval type-2 fuzzy logic-based two-order fuzzy control method for micro electrical discharge |
| JP2014073560A (en) * | 2012-10-05 | 2014-04-24 | Sodick Co Ltd | Wire-cut electric discharge machining device |
| CN102909444A (en) * | 2012-10-16 | 2013-02-06 | 中国石油大学(华东) | Pulsed power supply with parallel high-energy capacitors for electrosparking |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108380988A (en) * | 2018-01-30 | 2018-08-10 | 南京理工大学 | A kind of WEDM pulse power supply and its control method |
| CN108672858A (en) * | 2018-06-30 | 2018-10-19 | 南京理工大学 | The bipolarity WEDM pulse power supply and processing method of full-bridge crisscross parallel |
| CN108672858B (en) * | 2018-06-30 | 2020-05-22 | 南京理工大学 | Full-bridge staggered parallel bipolar wire cut electrical discharge machining pulse power supply and machining method |
| CN110856880A (en) * | 2018-08-23 | 2020-03-03 | 株式会社沙迪克 | Mould-carving electric discharge machine |
| CN110856880B (en) * | 2018-08-23 | 2020-11-24 | 株式会社沙迪克 | Mould-carving electric discharge machine |
| CN110328419A (en) * | 2019-07-22 | 2019-10-15 | 南京理工大学 | No resistive spark pulse power and its processing and clearance discharge condition recognition methods |
| CN110445372A (en) * | 2019-08-12 | 2019-11-12 | 无锡派微科技有限公司 | GaN interleaved parallel PFC power module for wireless charging system |
| CN110445394B (en) * | 2019-08-12 | 2020-11-13 | 黄山市瑞兴汽车电子有限公司 | High-efficiency GaN power module for supplying power to LED car lamp |
| CN110445394A (en) * | 2019-08-12 | 2019-11-12 | 黄山市瑞兴汽车电子有限公司 | High efficiency GaN power module for LED car lamp power supply |
| CN110365217B (en) * | 2019-08-12 | 2021-03-12 | 黄山学院 | High-power-density GaN full-bridge LLC power supply module |
| CN110380604B (en) * | 2019-08-12 | 2020-12-01 | 无锡派微科技有限公司 | High-voltage wide-input-range GaN power module for new energy power generation system |
| CN110380604A (en) * | 2019-08-12 | 2019-10-25 | 无锡派微科技有限公司 | Grid-connected power generation system high pressure wide input range GaN power module |
| CN110365217A (en) * | 2019-08-12 | 2019-10-22 | 黄山学院 | High power density GaN full-bridge LLC power module |
| CN111644718A (en) * | 2019-12-31 | 2020-09-11 | 南京理工大学 | Pulse power supply for smooth machining of medium-speed wire cutting and machining method thereof |
| CN111277138A (en) * | 2019-12-31 | 2020-06-12 | 南京理工大学 | Medium-speed wire cutting pulse power supply for processing waist drum problem and processing method thereof |
| CN111644718B (en) * | 2019-12-31 | 2022-08-12 | 南京理工大学 | Pulse power supply for smooth machining of medium-speed wire cutting and machining method thereof |
| CN111277138B (en) * | 2019-12-31 | 2022-08-16 | 南京理工大学 | Medium-speed wire cutting pulse power supply for processing waist drum problem and processing method thereof |
| CN111431432A (en) * | 2020-01-20 | 2020-07-17 | 南京理工大学 | Fine electric spark pulse power supply based on Boost and RC circuit |
| CN111193428A (en) * | 2020-01-20 | 2020-05-22 | 南京理工大学 | Micro high-frequency grouping pulse power supply |
| CN113271030A (en) * | 2021-05-25 | 2021-08-17 | 中国工程物理研究院机械制造工艺研究所 | Pulse generation control method for pulse power supply |
| CN113271030B (en) * | 2021-05-25 | 2022-11-29 | 中国工程物理研究院机械制造工艺研究所 | Pulse generation control method for pulse power supply |
| CN114252681A (en) * | 2021-12-17 | 2022-03-29 | 山东豪迈机械科技股份有限公司 | Electric spark machining gap leakage current detection control circuit and control method thereof |
| CN114252681B (en) * | 2021-12-17 | 2023-11-03 | 山东豪迈机械科技股份有限公司 | Electric spark machining gap leakage current detection control circuit and control method thereof |
| CN115070142A (en) * | 2022-06-01 | 2022-09-20 | 南京理工大学 | Novel peak current control method applied to electric spark machining pulse power supply |
| CN115070142B (en) * | 2022-06-01 | 2023-09-05 | 南京理工大学 | Novel peak current control method applied to electric spark machining pulse power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107276405B (en) | 2019-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107276405B (en) | The fine electric spark pulse power and Discrete control method based on the power supply | |
| CN105356734B (en) | It is a kind of that the Buck circuit power managing chips containing ripple compensation are controlled based on COT | |
| CN107186295B (en) | A kind of energy control methods such as the constant frequency of the fine electric spark pulse power | |
| CN101777770B (en) | Control circuit for voltage dropping type power factor corrector | |
| CN108380988B (en) | A kind of WEDM pulse power supply and its control method | |
| CN203872056U (en) | Direct-current power supply controlled by constant power | |
| CN111277138B (en) | Medium-speed wire cutting pulse power supply for processing waist drum problem and processing method thereof | |
| CN104038045B (en) | high power factor correction control circuit and device | |
| CN103973114A (en) | Constant power control direct-current power supply | |
| CN111193428B (en) | Micro high-frequency grouping pulse power supply | |
| CN106964853B (en) | A kind of composite pulse power supply for electro-discharge machining | |
| CN107276417A (en) | A kind of power-supply system | |
| WO2014198069A1 (en) | Control method for fully digital gas shielded welding machine and device thereof | |
| CN104467433A (en) | Method and device for controlling critical continuous mode unit power factor flyback converter | |
| CN201906913U (en) | Arc length control device for high-speed submerged arc welding process | |
| CN109768703A (en) | A kind of frequency conversion Average Current Control device and method based on output voltage feedback | |
| CN103648222A (en) | Non-isolated field light-emitting diode (LED) driving circuit with power factor corrector (PFC) and controller thereof | |
| CN111245238A (en) | Three-level Boost circuit control method and system | |
| CN110518818A (en) | CRM decompression-flyback pfc converter of fixed-frequency control | |
| CN110677063B (en) | Series-parallel DCM Boost PFC converter and working method thereof | |
| CN203618197U (en) | LED drive circuit of non-isolated solid zone PFC and controller thereof | |
| CN105186861B (en) | Pseudo- continuous conduction mode switch converters determine afterflow Duty ratio control method and its device | |
| CN107124105A (en) | Improve isolated form three-level PFC converter PF control system and method | |
| CN207283409U (en) | A kind of power-supply system | |
| CN115070142B (en) | Novel peak current control method applied to electric spark machining pulse power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |