CN206614115U - A kind of spark pulse power - Google Patents
A kind of spark pulse power Download PDFInfo
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- CN206614115U CN206614115U CN201720125952.5U CN201720125952U CN206614115U CN 206614115 U CN206614115 U CN 206614115U CN 201720125952 U CN201720125952 U CN 201720125952U CN 206614115 U CN206614115 U CN 206614115U
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Abstract
The utility model discloses a kind of spark pulse power, including puncturing circuit loop and constant current resource loop, puncture circuit loop to be made up of the DC source one connected, resistance, power switch pipe one, diode one and discharging gap, time schedule controller is connected with power switch pipe one；Constant current resource loop includes charging paths and afterflow branch road, and charging paths are made up of the DC source two connected, power switch pipe two, inductance, diode two, and inductance, diode two, DC source one, the diode three of the route series connection of afterflow branch are constituted；And current sensor is also in series with charging paths, closed-loop current control device is connected between current sensor and power switch pipe two, diode three is connected between current sensor and power switch pipe two.The pulse power designed by the utility model is more saved than conventional power source, more efficient, while the destabilizing factor for reducing the complexity of system than existing energy-saving power supply and reducing therefore bringing, improves reliability.
Description
Technical field
The present invention relates to power technique fields, it particularly relates to a kind of spark pulse power.
Background technology
In general, traditional electric spark working pulse power source energy consumption is very high, and power-efficient is all very low, rarely exceeds
30%, because the electric current of its output is much consumed by current-limiting resistance.Early stage spark erosion technique is applied, because at that time
Basic technology more falls behind and people more pursue processing performance, so conventional power source is widely applied, although in this way, such
The main flow that power supply is still still used so far.However, with the development of modern society, energy-conserving and environment-protective are increasingly subject to the pass of people
Note, reduce energy consumption receives attention, so, traditional electrical discharge machining pulse power electric energy is paid attention to using low problem.For
This problem is solved, while processing technology requirement is met, the utilization rate of electric energy should be further improved.
In recent years, some mechanisms have been developed that the energy-saving pulse power with closed-loop current control ability both at home and abroad,
With the energy utilization rate for solving conventional power source it is low the problem of.But, what existing energy-saving power supply was largely combined using high-low pressure
Mode, high-pressure section and the low-pressure section of power supply are independent, and high-pressure section is responsible for striking and punctured, and low-pressure section is responsible between electric discharge
Gap punctures the electric current used in backward gap offer ablation.This mode requires that power supply has special time schedule controller to go both control
Between conspiracy relation, become more sophisticated control.
Electrical spark working man-hour, the pulse power exports the electric current of approximate square waves, is applicable to major applications occasion.Because by
The effect of different factors, the technic index such as export license, processing efficiency, surface roughness, machining accuracy be affected, it is necessary to
The electric current of special waveform is exported to obtain desired processing index.Such as when carrying out the low-loss processing of Steel material, it is necessary to electricity
The forward position slope of stream is smaller；Carrying out when the larger difficult-to-machine material of fusing point, thermal conductivity factor, specific heat capacity is processed, it is necessary to which electric current has
Have the starting stage forward position it is higher the characteristics of.In order to solve these problems, it is desirable to which power supply has multiple waveforms control technology and can
To be applied accordingly under different occasions.
At present, existing energy-saving power supply only has single or seldom output current wave, it is difficult to which it is different to take into account processing
The special process demand of material.Although although conventional power source is easier to realize a variety of output current waves controls, energy consumption compared with
Greatly, such power supply will be eliminated gradually.Therefore, the waveform control problem for solving energy-saving electric power outputting current is electrical spark working
One of work field important research direction.
Not yet announce the effective solution of proposition in the problem of in correlation technique, current field.
The content of the invention
The purpose of the present invention is to propose to a kind of spark pulse power, above-mentioned asked with overcome present in existing correlation technique
Topic.
The technical proposal of the invention is realized in this way：
According to an aspect of the invention, there is provided a kind of spark pulse power.
The spark pulse power includes puncturing circuit loop and puncturing the constant-current source that circuit loop is connected with described
Loop, wherein,
The circuit loop that punctures is by the DC source one connected, resistance, power switch pipe one, diode one and discharging gap
Constitute, time schedule controller is connected with the power switch pipe one；
The constant current resource loop includes charging paths and afterflow branch road, wherein, the charging paths are by the DC source connected
2nd, power switch pipe two, inductance, diode two are constituted, the inductance of afterflow branch route series connection, diode two, described
DC source one, diode three are constituted；And be also in series with current sensor in the charging paths, the current sensor with it is described
Closed-loop current control device is connected between power switch pipe two, the diode three is connected to the current sensor and the work(
Between rate switching tube two；
When the discharging gap is breakdown, the circuit loop that punctures constitutes discharge current time with the constant current resource loop
Road, wherein,
The charging paths in the discharge current loop are by the DC source one, the DC source two, the power connected
Switching tube two, the inductance, the power switch pipe one, the diode one and the discharging gap are constituted, the electric discharge electricity
Flow back to road afterflow branch route series connection the inductance, the power switch pipe one, the diode one, the discharging gap and
The diode three is constituted.
Wherein, the current sensor is series between the power switch pipe two and the inductance.
Wherein, the current sensor be series at the inductance and the diode and between.
It is preferred that, the control mode of the closed-loop current control device is PWM control modes.
It is preferred that, the power switch pipe one include it is following any one：FET, triode or IGBT (insulated gates
Bipolar transistor).
It is preferred that, the power switch pipe two include it is following any one：FET, triode or IGBT.
It is preferred that, the current sensor include it is following any one：Current transformer, Hall sensor or accurate electricity
Resistance.
According to another aspect of the present invention there is provided a kind of waveform controlling method of spark pulse power output current,
For above-mentioned spark pulse power.
The waveform controlling method comprises the following steps：
In advance to closed-loop current control device sets target current value, and the current value on inductance is promoted to be the target current
Value；
Disruptive discharge gap, and after the discharging gap is breakdown, the electric current on the inductance is exported to described and put
Electric gap；
It is pre-configured with detection unit to detect discharging gap, and is that the discharging gap is breakdown in testing result
In the case of, trigger signal is produced, and the trigger signal is sent to current controller；
The current controller is received after the trigger signal, is set new target current value, is promoted the electricity in inductance
Stream is raised or lowered to the new target current value with certain slope, forms waveform.
Beneficial effects of the present invention：The pulse power designed by the present invention is more saved than conventional power source, more efficient, electricity
Can utilization rate reach more than 70%, power supply eliminates the high-power current-limiting resistance of conventional power source, reduce power supply caloric value and
Therefore the heat dissipation problem brought.Power supply designed by the present invention also have than existing energy-saving power supply in structure and control more
The characteristics of simplifying, the destabilizing factor for reducing the complexity of system and reducing therefore bringing, improves reliability.
Output current wave control method of the present invention, can be used as the section using inductance as output current filter element
The control method generally used of the energy type pulse power, the method can increase the species of output current wave, and then lifting adds
Work performance, preferably meets use demand.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the topological circuit figure of spark pulse power according to embodiments of the present invention；
Fig. 2 is the control flow of the waveform controlling method of spark pulse power output current according to embodiments of the present invention
Block diagram；
Fig. 3 is the control principle of the waveform controlling method of spark pulse power output current according to embodiments of the present invention
Figure.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained belongs to what the present invention was protected
Scope.
There is provided a kind of spark pulse power for embodiments in accordance with the present invention.
As shown in figure 1, it is same power supply that the hi-lo circuit of spark pulse power according to embodiments of the present invention is actual
Two parts.The high-pressure section of power supply is by after gap breakdown, and the height laminate section of power supply is exported to gap together as overall
Electric current is processed, and high-pressure section integrally switches with power supply does not need extra sequence circuit to be controlled.In addition, the master of power supply
Loop belongs to compound loop, is made up of tandem type switch current stabilization circuit with freewheeling circuit.
Specifically, with continued reference to shown in Fig. 1, when not puncturing in gap, the G1 of power switch pipe one shut-offs have two functions to return
Road：
High-voltage breakdown circuit loop (constant pressure source is also referred to as high tension loop), including the E1 of DC source one, resistance R, power
The G1 of switching tube one, the D1 of diode one, discharging gap.This part is identical with traditional power supply high tension loop.
Constant current resource loop, includes the charging branch of the E2 of DC source two, the G2 of power switch pipe two, inductance L, the D2 of diode two composition
Road and inductance L, the E1 of DC source one, the afterflow branch road of the D3 of diode three compositions.
During specific works, first, inductance L is charged by the E2 of DC source two, electric current flows through the D2 of diode two.When in inductance L
Electric current reach after desired value, closed-loop current control device by the G2 of power switch pipe two turn off, now the electric current in inductance L is through two poles
The D2 of pipe two, the D3 of diode three are fed back in the E1 of DC source one.
After gap breakdown, when the G1 of power switch pipe one is closed, loop is made up of One function loop：
Discharge current loop (constant-current source circuit), including the E1 of DC source one and the E2 of DC source two, the G2 of power switch pipe two, electricity
Feel L, the G1 of power switch pipe one, the D1 of diode one, the charging paths of discharging gap composition；Inductance L, the G1 of power switch pipe one, two
The D1 of pole pipe one, discharging gap, the afterflow branch road of the D3 of diode three compositions.
It is common to electricity by the E1 of the DC source one and E2 of DC source two by when the G2 of power switch pipe two is opened during specific works
Feel L chargings, electric current flows through inductance L, the D1 of diode one and discharging gap, gap is discharged.When the G2 of power switch pipe two is closed
Have no progeny, the energy of inductance L storages continues to gap discharge, and electric current flows through the D1 of diode one, discharging gap and the D3 of diode three.
When specifically used, the control mode of closed-loop current control device is PWM control modes, the G1 power of power switch pipe one
Switching tube two and G2 include it is following any one：FET, triode or IGBT (insulated gate bipolar transistor).And electric current
Sensor then may include it is following any one：Current transformer, Hall sensor or precision resistance.
As can be seen here, the inductive current in above-mentioned power supply is controlled volume, under PWM closed control machining function, electricity
The constantly storage and release of sense storage energy, makes inductive current that high frequency saw-like tooth waveform is presented, this electric current is output among gap, produces
Raw ablation effect.The major loop structure of this power supply can both export larger electric current to adapt to the need of big removal amount processing
Will, it can also be adapted to by adjusting the less electric current of parameter output of the elements such as inductance the need for finishing.It is in detection circuit
With under the collective effect of closed-loop current control device, it is possible to provide different processing electric currents, export multiple waveforms.
Embodiments in accordance with the present invention, additionally provide a kind of waveform controlling method of spark pulse power output current,
For above-mentioned spark pulse power.
As shown in Fig. 2 the waveform controlling method comprises the following steps：
Step S101, in advance to closed-loop current control device sets target current value, and promotes the current value on inductance to be institute
State target current value；
Step S103, disruptive discharge gap, and after the discharging gap is breakdown, the electric current on the inductance is exported
To the discharging gap；
Step S105, is pre-configured with detection unit and discharging gap is detected, and between testing result is the electric discharge
In the case that gap is breakdown, trigger signal is produced, and the trigger signal is sent to current controller；
Step S107, the current controller is received after the trigger signal, is set new target current value, is promoted
Electric current in inductance is raised or lowered to the new target current value with certain slope, forms waveform.
The above-mentioned technical proposal of the present invention is understood for convenience, and the mode below by way of example is carried out to above-mentioned technical proposal
Describe in detail.
As shown in figure 3, the process of different wave is as follows：
At the t0 moment, now discharging gap does not puncture, and power source internal current setting value is the inductance inside r1, constant-current source
Upper current cycle remains r1, and t1 moment discharging gaps are breakdown, and gap voltage u, which declines rapidly, the higher-order of oscillation occurs.Detection electricity
Road detects gap one trigger signal of breakdown rear transmission to current controller, and current controller sets new target electricity immediately
Flow valuve r2, now the electric current on inductance will not be mutated, or r1.After gap breakdown inductance and with discharging gap constitute one it is new
Loop, therefore, the t1 moment flows through the gap current of discharging gap and essentially identical (this of electric current on output current filter inductance
Place, the influence of distributed constant is very small), and new desired value r2, the electric current of output are risen to certain slope over time
It is formed the waveform with certain inclination angle approximate trapezoid.
At the t2 moment, power supply turns off the current loop for being output to discharging gap, and gap voltage is zero, on filter inductance
Electric current is circulated in the inside of power supply again.Now, the electric current on inductance carries out inner loop by target of r3.
At the t3 moment, discharging gap is breakdown again and detected circuit is detected, and trigger signal issues current controller, electric current again
Controller sets new target current value r2 immediately.Now, the electric current on filter inductance will not be mutated, or r3, by one section
Time, which drops to after desired value r2, keeps stable, and discharging gap is also the same with the electric current on filter inductance, before output one has
Along higher current waveform, it is turned off in the loop of t4 moment discharge currents, gap current is zero, and filter inductance switches again
To power source internal loop, and by target of r2, continuation is kept.
Breakdown again in t5 moment discharging gap, and now, current controller desired value is unchanged or r2, now puts
Electric current on electric gap is exported by target of r2, and the waveform of output is approximately square wave.
In summary, by means of the above-mentioned technical proposal of the present invention, the pulse power designed by the present invention compares conventional power source
More save, more efficient, utilization rate of electrical reaches more than 70%, and power supply eliminates the high-power current-limiting resistance of conventional power source,
The heat dissipation problem for reducing the caloric value of power supply and therefore bringing.Power supply designed by the present invention also has than existing energy-saving electrical
Source structure and control on more simplify the characteristics of, reduce the complexity of system and reduce thus bring it is unstable because
Element, improves reliability.
Output current wave control method of the present invention, can be used as output current filter element as using inductance
The control method generally used of the energy-saving pulse power, the method can increase the species of output current wave, and then be lifted
Processing characteristics, preferably meets use demand.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (7)
1. a kind of spark pulse power, it is characterised in that including puncturing circuit loop and puncturing circuit loop phase with described
The constant current resource loop of connection, wherein,
The circuit loop that punctures is by the DC source one connected, resistance, power switch pipe one, diode one and discharging gap structure
Into being connected with time schedule controller on the power switch pipe one；
The constant current resource loop includes charging paths and afterflow branch road, wherein, the charging paths are by DC source two, the work(connected
Rate switching tube two, inductance, diode two are constituted, the inductance, diode two, the DC source of the afterflow branch route series connection
First, diode three is constituted；And current sensor, the current sensor and the power are also in series with the charging paths
Closed-loop current control device is connected between switching tube two, the diode three is connected to the current sensor and opened with the power
Between the pipe two of pass；
When the discharging gap is breakdown, the circuit loop that punctures constitutes discharge current loop with the constant current resource loop,
Wherein,
The charging paths in the discharge current loop are by the DC source one, the DC source two, the power switch connected
Pipe two, the inductance, the power switch pipe one, the diode one and the discharging gap are constituted, and the discharge current is returned
The inductance, the power switch pipe one, the diode one, the discharging gap and described of the afterflow branch route series connection on road
Diode three is constituted.
2. spark pulse power according to claim 1, it is characterised in that the current sensor is series at the work(
Between rate switching tube two and the inductance.
3. spark pulse power according to claim 1, it is characterised in that the current sensor is series at the electricity
Between sense and the diode two.
4. spark pulse power according to claim 1, it is characterised in that the controlling party of the closed-loop current control device
Formula is PWM control modes.
5. spark pulse power according to claim 1, it is characterised in that the power switch pipe one includes following
Meaning is a kind of：
FET, triode or IGBT.
6. spark pulse power according to claim 1, it is characterised in that the power switch pipe two includes following
Meaning is a kind of：
FET, triode or IGBT.
7. spark pulse power according to claim 1, it is characterised in that the current sensor includes following any
It is a kind of：
Current transformer, Hall sensor or precision resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720125952.5U CN206614115U (en) | 2017-02-13 | 2017-02-13 | A kind of spark pulse power |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720125952.5U CN206614115U (en) | 2017-02-13 | 2017-02-13 | A kind of spark pulse power |
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| CN206614115U true CN206614115U (en) | 2017-11-07 |
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| CN201720125952.5U Withdrawn - After Issue CN206614115U (en) | 2017-02-13 | 2017-02-13 | A kind of spark pulse power |
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Cited By (2)
| 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 |
| 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 |
-
2017
- 2017-02-13 CN CN201720125952.5U patent/CN206614115U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171107 Effective date of abandoning: 20190726 |
|
| AV01 | Patent right actively abandoned |