CN204397103U - A kind of chopped mode energy-saving electrical adds working pulse power source - Google Patents
A kind of chopped mode energy-saving electrical adds working pulse power source Download PDFInfo
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- CN204397103U CN204397103U CN201420842920.3U CN201420842920U CN204397103U CN 204397103 U CN204397103 U CN 204397103U CN 201420842920 U CN201420842920 U CN 201420842920U CN 204397103 U CN204397103 U CN 204397103U
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Abstract
The utility model discloses a kind of chopped mode energy-saving electrical and add working pulse power source, comprise the second adjustable DC power supply, the first adjustable DC power supply, main control singlechip, current stabilization circuit, the first power switch pipe, the second power switch pipe, the first high voltage isolated diode, the second high voltage isolated diode, impulse transfer and starting the arc drive circuit, impulse transfer and Chopper driving circuit, power adjustment control circuit.The utility model not only eliminates the serious current-limiting resistance of power consumption, improve the utilization rate of the pulse power, and it is easy to possess the starting the arc, the white performance adapting to pressure regulation and pulse current Parameter adjustable, can independently adjust in pulse voltage, pulse current, pulse width and pulse spacing simultaneously.
Description
Technical field
The utility model relates to a kind of power supply, is specifically related to a kind of chopped mode energy-saving electrical and adds working pulse power source.
Background technology
The good and bad production efficiency on spark machined of its performance, product processing quality, export license have larger impact, especially have conclusive impact with utilization rate of electrical.
The pulse power is the chief component in electric machining system, has various structures form.Such as, the independent pulse generator of discharging gap and dc source independent, isolation mutually separately, and on the basis of independent pulse generator the dissimilar pulse power such as derivative high-low pressure composite pulse power supply, the multiloop pulse power.
The utilization rate of electrical of the most frequently used series limiting resistor electric spark working pulse power source is less than 25%, electric energy more than 75% then with the form consumption of heat on current-limiting resistance, not only reduce the utilization rate of electric energy, also the cooling system of paired pulses power supply and the service behaviour of electronic component propose higher requirement simultaneously.The pulse power of major loop current limit by inductance formula needs to design, use the inductance in inductance element or transformer coil to substitute current-limiting resistance carries out current limliting and energy storage, although make the utilization rate of electrical of the pulse power be greatly improved, limit the adjustable range of pulse parameter.Also have the PWM voltage-regulating energy saving electric machining pulse power, it is under high-frequency PWM working method, and the switching loss being limited by power switch component is very large, is difficult to realize high-frequency impulse electric machining.
Utility model content
The purpose of this utility model is the shortcoming overcoming above-mentioned prior art, provide a kind of chopped mode energy-saving electrical and add working pulse power source, this power supply not only eliminates the serious current-limiting resistance of power consumption, improve the utilization rate of the pulse power, and possess the feature that arcing voltage is high, adjustable, the easy starting the arc, the performance of voltage adaptive controlling and pulse current Parameter adjustable, can independently adjust in pulse voltage, pulse current, pulse width and pulse spacing simultaneously.
For achieving the above object, chopped mode energy-saving electrical described in the utility model adds working pulse power source chopped mode energy-saving electrical and adds working pulse power source, it is characterized in that, comprise the second adjustable DC power supply, the first adjustable DC power supply, main control singlechip, current stabilization circuit, the first power switch pipe, the second power switch pipe, the first high voltage isolated diode, the second high voltage isolated diode, impulse transfer and starting the arc drive circuit, impulse transfer and Chopper driving circuit, power adjustment control circuit;
The negative pole of described second adjustable DC power supply is connected with the positive pole of the first adjustable DC power supply, the negative pole of the first adjustable DC power supply is connected with workpiece to be processed, the positive pole of the second adjustable DC power supply is connected through the positive pole of the first power switch pipe with the first high voltage isolated diode, the positive pole of the first adjustable DC power supply is connected with the positive pole of the second high voltage isolated diode through current stabilization circuit and the second power switch pipe successively, is connected after the negative pole of the first high voltage isolated diode is connected with the negative pole of the second high voltage isolated diode with electrode;
Main control singlechip is through the input of communication interface and dc source adjusting control circuit, the input of impulse transfer and starting the arc drive circuit, the input of impulse transfer and Chopper driving circuit and the input of current stabilization circuit are connected, the output of impulse transfer and starting the arc drive circuit is connected with the control end of the first power switch pipe, the output of impulse transfer and Chopper driving circuit is connected with the control end of the second power switch pipe, the output of power adjustment control circuit is connected with the control end of the first adjustable DC power supply and the control end of the second adjustable DC power supply respectively.
Size of current and the voltage swing of described first adjustable DC power supply are respectively 0-50A and 0-60V.
Size of current and the voltage swing of described second adjustable DC power supply are respectively 200-300V and 0-5A.
The pwm pulse signal exported by impulse transfer and starting the arc drive circuit controls the striking current pulse that the first power switch pipe exports, and turns off the first power switch pipe after striking current produces;
The pwm pulse signal exported by impulse transfer and Chopper driving circuit controls the current pulse width that the second power switch pipe exports, and the pulse width of pwm pulse signal is minimum is 1 μ s.
Described current stabilization circuit comprises the 3rd power switch pipe, and positive pole and second power switch pipe of the 3rd power switch pipe and the second adjustable DC power supply are connected, and the control end of the 3rd power switch pipe is connected with the output of main control singlechip.
Also comprise the detector for detecting the second power switch pipe output current, detector is made up of the first pulses of current sensor and the second pulses of current sensor, wherein, first pulses of current sensor and the second power switch pipe are connected in series, and the second pulses of current sensor and the 3rd power switch pipe are connected in series.
Pulse current gap voltage V between electrode and workpiece to be processed
o>=V
q2+ V
q4+ V
d2+ V
gap, wherein, V
q2be the saturation voltage drop of the second power switch pipe, V
q4be that the voltage of voltage regulation of the 3rd power switch pipe falls, V
d2be the electric conduction pressure drop of the second high voltage isolated diode, V
gapfor discharging gap arcdrop.
Described second adjustable DC power supply is less than 0.2 μ s in the working time of each pulse period.
The current capacity of described first power switch pipe and the current capacity of the first high voltage isolated diode are all less than 10A, and withstand voltage scope is all more than or equal to 600V;
The current capacity of described second power switch pipe and the second high voltage isolated diode is all greater than 100A, and the withstand voltage scope of the second power switch pipe is more than or equal to 150V, and the withstand voltage scope of the second high voltage isolated diode is more than or equal to 600V.
Also comprise for the pulse current gap voltage V between detecting electrode and workpiece to be processed
otesting circuit.
The utility model has following beneficial effect:
Chopped mode energy-saving electrical described in the utility model adds working pulse power source in use, the adjustment of voltage is realized by voltage regulator circuit, realized the adjustment of the pulse width that the first power switch pipe exports by main control singlechip and impulse transfer and starting the arc drive circuit simultaneously, the adjustment of the pulse width exported by main control single-chip microcomputer and impulse transfer and Chopper driving circuit realiration second power switch pipe, realized the adjustment of the electric current exported by current stabilization circuit simultaneously, in addition, the independence adjustment in pulse spacing is realized by main control singlechip, simple to operate, completely abolish the current-limiting resistance that power consumption is serious, utilization rate of electrical can improve about 2 times.And the first power switch pipe in starting the arc loop of the present utility model is synchronous open-minded with the second power switch pipe, first power switch pipe does not participate in main pulse electrical current, therefore the first power switch pipe only has very little turn-on consumption and turn-off power loss, does not produce conduction loss.
Further, the pwm pulse signal that first power switch pipe and the second power switch pipe output pulse width depend on, under pwm pulse signal drives, the second power switch pipe only plays on-off action, considerably reduce the operating voltage of the second power switch pipe working in copped wave state, improve the condition of work of the second power switch pipe.
In addition, the utility model eliminates the high power industrial frequency transformer needed for traditional electric spark working pulse power source, reduces the requirement of the stabilization time to dc source simultaneously, effectively reduce the volume and weight of the pulse power, and cost is low; The utility model has completely abolished high-power current-limiting resistance, therefore effectively reduces the influence because of electronic component in resistance heating paired pulses power supply, improves the functional reliability of the pulse power.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is the external circuit figure of main control singlechip in the utility model;
Wherein, 1 to be the first adjustable DC power supply, 2 be the second adjustable DC power supply, 3 is current stabilization circuit, 4 is impulse transfer and starting the arc drive circuit, 5 is testing circuit, 7 is power adjustment control circuit, 8 is communication interface, 9 is main control singlechip for impulse transfer and Chopper driving circuit, 6.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
With reference to figure 1 and Fig. 2, chopped mode energy-saving electrical described in the utility model adds working pulse power source and comprises the first adjustable DC power supply 1, second adjustable DC power supply 2, main control singlechip, current stabilization circuit 3, first power switch pipe Q1, the second power switch pipe Q2, the first high voltage isolated diode D1, the second high voltage isolated diode D2, impulse transfer and starting the arc drive circuit 4, impulse transfer and Chopper driving circuit 5, power adjustment control circuit 7, the negative pole of described second adjustable DC power supply 2 is connected with the positive pole of the first adjustable DC power supply 1, the negative pole of the first adjustable DC power supply 1 is connected with workpiece to be processed, the positive pole of the second adjustable DC power supply 2 is connected with the positive pole of the first high voltage isolated diode D1 through the first power switch pipe Q1, the positive pole of the first adjustable DC power supply 1 is connected with the positive pole of the second high voltage isolated diode D2 through current stabilization circuit 3 and the second power switch pipe Q2 successively, be connected with electrode after the negative pole of the first high voltage isolated diode D1 is connected with the negative pole of the second high voltage isolated diode D2, electrode is positioned at directly over workpiece to be processed, the output of main control singlechip and the input of power adjustment control circuit 8, the input of impulse transfer and starting the arc drive circuit 4, the input of impulse transfer and Chopper driving circuit 5 and the control end of current stabilization circuit 3 are connected, the output of impulse transfer and starting the arc drive circuit 4 is connected with the control end of the first power switch pipe Q1, the output of impulse transfer and Chopper driving circuit 5 is connected with the control end of the second power switch pipe Q2, the output of power adjustment control circuit 7 is connected with the control end of the first adjustable DC power supply 1 and the control end of the second adjustable DC power supply 2 respectively, size of current and the voltage swing of the first adjustable DC power supply 1 are respectively 0-50A and 0-60V, size of current and the voltage swing of the second adjustable DC power supply 2 are respectively 200-300V and 0-5A, the pwm pulse signal exported by impulse transfer and Chopper driving circuit 5 controls the current pulse width that the second power switch pipe Q2 exports, and wherein, the current impulse minimum widith that the second power switch pipe Q2 exports reaches 1 μ s, current stabilization circuit 3 comprises the 3rd power switch pipe Q3, and positive pole and the second power switch pipe Q2 of the 3rd power switch pipe Q3 and the second adjustable DC power supply 2 are connected, and the control end of the 3rd power switch pipe Q3 is connected with the output of main control singlechip.
The utility model also comprises the detector for detecting the second power switch pipe Q2 output current, detector is made up of the first pulses of current sensor and the second pulses of current sensor, wherein, first pulses of current sensor and the second power switch pipe Q2 are connected in series, and the second pulses of current sensor and the 3rd power switch pipe Q3 are connected in series; Pulse current gap voltage V between electrode and workpiece to be processed
o>=V
q2+ V
q4+ V
d2+ V
gap, wherein, V
q2be the saturation voltage drop of the second power switch pipe Q2, V
q4be that the voltage of voltage regulation of the 3rd power switch pipe Q3 falls, V
d2be the electric conduction pressure drop of the second high voltage isolated diode D2, V
gapfor discharging gap arcdrop; The working time of the second adjustable DC power supply 2 is less than 0.2 μ s; The current capacity of the first power switch pipe Q1 and the current capacity of the first high voltage isolated diode D1 are all less than 10A, and withstand voltage scope is all more than or equal to 600V; The current capacity of described second power switch pipe Q2 and the second high voltage isolated diode D2 is all greater than 100A, the withstand voltage scope of the second power switch pipe Q2 is more than or equal to 150V, the withstand voltage scope of the second high voltage isolated diode D2 is more than or equal to 600V, and the utility model also comprises for the pulse current gap voltage V between detecting electrode and workpiece to be processed
otesting circuit 6.
If need larger output current, the power output of dc source 1 first to be improved; Secondly, be limited to the technical merit of current power switch component, can multiple current stabilization circuit 3 in parallel, to strengthen the output of stabling current, and the second power switch Q2 also can strengthen control electric current with many power tube parallel connections.
Principle of the present utility model:
Main control singlechip produces pwm pulse signal, and described pwm pulse signal is forwarded in impulse transfer and starting the arc drive circuit 4 and impulse transfer and Chopper driving circuit 5 by communication interface 8, impulse transfer and starting the arc drive circuit 4 and impulse transfer and Chopper driving circuit 5 controls the first power switch pipe Q1 according to described pwm pulse signal and the second power switch pipe Q2 starts working, first adjustable DC power supply 1 and the second adjustable DC power supply 2 are connected with electrode, electrode output amplitude is the high voltage of the first adjustable DC power supply 1 and the second adjustable DC power supply 2 output voltage sum, and then the high voltage that electrode sends makes the gap between electrode and workpiece breakdown, thus formation discharging gap, after starting the arc success, discharging gap pressure drop reduces, electric current increases, the the second power switch pipe Q2 automatic connection electric current sustain discharge synchronously opened with the first power switch pipe Q1, along with the increase of discharge current, when the first power switch pipe Q1 flows through the striking current that electric current reaches default, the signal that impulse transfer and starting the arc drive circuit 4 produce shutoff first power switch pipe Q1 makes the first power switch pipe Q1 turn off, by this, gap discharge electric current is provided by the second power switch pipe Q2 completely, until discharge cycle terminates, second power switch pipe Q2 under pwm signal drives also is turned off.Arrive to next discharge cycle signal, repeat said process, namely Q1Q2 opens the-> starting the arc-> and turns off the On The Cycle Working Process that the first power switch pipe Q1-> second power switch pipe Q2 electric discharge-> turns off the second power switch pipe Q2, so go on circularly, 3rd power switch pipe Q3 is responsible for the stable output of discharge current, first power switch pipe Q1 is responsible for the starting the arc, second power switch pipe Q2 is responsible for break-make (copped wave) control that current impulse exports, just the automatic constant current copped wave achieving each discharge pulse exports.Along with the formation of striking current, gap voltage produces and significantly declines, and when gap voltage is down to setting voltage, the second power switch pipe Q2 starts conducting afterflow, and gap current increases further; When the striking current flowing through Q1 reaches setting value, drive circuit sends and turns off Q1 control signal, in this process, second power switch pipe Q2 maintains afterflow, the continuing current flow flowing through Q2 increases, until reach nominal discharge current, current stabilization circuit 3 stabling current is setting numerical value, till pwm signal turns off electric discharge.First power switch pipe Q1 and the second power switch pipe Q2 adopts MOSFET or the IGBT constant power element of high switching frequency to form.First high voltage isolated diode D1, the second high voltage isolated diode D2 require that withstand voltage puncturing is greater than 600V and is advisable, and recovery time is more short better.
Pulse current gap voltage V in setting the utility model between workpiece to be processed and electrode
o>=V
q2+ V
q3+ V
d2+ V
gap, wherein, V
q2be the saturation voltage drop of the second power switch pipe Q2, V
q3be that the voltage of voltage regulation of the 3rd power switch pipe Q3 falls, V
d2be the electric conduction pressure drop of the second high voltage isolated diode D2, V
gapfor discharging gap arcdrop.Due to the utility model operationally, second adjustable DC power supply 2 only works the electric arc that ignites, surveying its working time is less than 0.2 μ s, the electric current of discharge pulse provides primarily of the second adjustable DC power supply 2, the loss of major part pulse current mainly produces on the 3rd power switch pipe Q3, during regular picture, work as V
q3during=1.75-3V, the power loss of whole device major loop is minimum.
In addition, general switching mode dc source is less than 20ms stabilization time, and the power loss under limiting case on the 3rd power switch pipe Q3 is: (60V-first adjustable DC power supply 1 adjusts rear output voltage) × 25A × 20ms=15W/s; Peak power loss during normal current stabilization on the 3rd power switch pipe Q3 is 75W/s, and visible, power loss of the present utility model is lost close to the saturation conduction of power switch pipe, achieves energy-conservation electric discharge.
In whole device, could produce pwm pulse signal by main control singlechip, highest frequency reaches 500kHz, and pulse width is minimum is 1 μ s; Pwm pulse signal is in the conversion of communication interface 8 dispense-pulse and starting the arc drive circuit 4 and impulse transfer and Chopper driving circuit 5; Impulse transfer and starting the arc drive circuit 4 are provided with arc striking circuit observation circuit, and after the positive half cycle of pwm pulse signal (opening period) detects striking current, turn off the first power switch pipe Q1, pulse current is continued by the second power switch pipe Q2 and provides; At the positive half cycle of pwm pulse signal, along with striking current produces (starting the arc success), discharge gap voltage declines rapidly, electric current rises fast, along with the shutoff of the first power switch pipe Q1, the second power switch pipe Q2 completes continuing of discharge pulse current, until the negative half period of pwm pulse signal terminates, the size of discharge current sends to current stabilization circuit 3 by main control singlechip through isolating chip Si84xx, and current stabilization circuit 3 regulates the size arranging current stabilization value according to instruction; Adjustment data are sent to power adjustment control circuit 7 through communication interface 8 by main control singlechip, and then regulate the first adjustable DC power supply 1 and the second adjustable DC power supply 2 output voltage by power adjustment control circuit 7.
Claims (10)
1. a chopped mode energy-saving electrical adds working pulse power source, it is characterized in that, comprise the second adjustable DC power supply (2), the first adjustable DC power supply (1), main control singlechip, current stabilization circuit (3), the first power switch pipe (Q1), the second power switch pipe (Q2), the first high voltage isolated diode (D1), the second high voltage isolated diode (D2), impulse transfer and starting the arc drive circuit (4), impulse transfer and Chopper driving circuit (5) and power adjustment control circuit (7);
The negative pole of described second adjustable DC power supply (2) is connected with the positive pole of the first adjustable DC power supply (1), the negative pole of the first adjustable DC power supply (1) is connected with workpiece to be processed, the positive pole of the second adjustable DC power supply (2) is connected through the positive pole of the first power switch pipe (Q1) with the first high voltage isolated diode (D1), the positive pole of the first adjustable DC power supply (1) is connected with the positive pole of the second high voltage isolated diode (D2) through current stabilization circuit (3) and the second power switch pipe (Q2) successively, be connected with electrode after the negative pole of the first high voltage isolated diode (D1) is connected with the negative pole of the second high voltage isolated diode (D2),
Main control singlechip is through the input of communication interface (8) with dc source adjusting control circuit (7), the input of impulse transfer and starting the arc drive circuit (4), the input of impulse transfer and Chopper driving circuit (5) and the input of current stabilization circuit (3) are connected, the output of impulse transfer and starting the arc drive circuit (4) is connected with the control end of the first power switch pipe (Q1), the output of impulse transfer and Chopper driving circuit (5) is connected with the control end of the second power switch pipe (Q2), the output of power adjustment control circuit (7) is connected with the control end of the first adjustable DC power supply (1) and the control end of the second adjustable DC power supply (2) respectively.
2. chopped mode energy-saving electrical according to claim 1 adds working pulse power source, it is characterized in that, size of current and the voltage swing of described first adjustable DC power supply (1) are respectively 0-50A and 0-60V.
3. chopped mode energy-saving electrical according to claim 1 adds working pulse power source, it is characterized in that, size of current and the voltage swing of described second adjustable DC power supply (2) are respectively 200-300V and 0-5A.
4. chopped mode energy-saving electrical according to claim 1 adds working pulse power source, it is characterized in that,
The pwm pulse signal exported by impulse transfer and starting the arc drive circuit (4) controls the striking current pulse that the first power switch pipe (Q1) exports, and turns off the first power switch pipe (Q1) after striking current produces;
The pwm pulse signal exported by impulse transfer and Chopper driving circuit (5) controls the current pulse width that the second power switch pipe (Q2) exports, wherein, the current pulse width that exports of the second power switch pipe (Q2) is minimum is 1 μ s.
5. chopped mode energy-saving electrical according to claim 1 adds working pulse power source, it is characterized in that, described current stabilization circuit (3) comprises the 3rd power switch pipe (Q3), positive pole and second power switch pipe (Q2) of the 3rd power switch pipe (Q3) and the second adjustable DC power supply (2) are connected, and the control end of the 3rd power switch pipe (Q3) is connected with the output of main control singlechip.
6. chopped mode energy-saving electrical according to claim 4 adds working pulse power source, it is characterized in that, also comprise the detector for detecting the second power switch pipe (Q2) output current, detector is made up of the first pulses of current sensor and the second pulses of current sensor, wherein, first pulses of current sensor and the second power switch pipe (Q2) are connected in series, and the second pulses of current sensor and the 3rd power switch pipe (Q3) are connected in series.
7. chopped mode energy-saving electrical according to claim 5 adds working pulse power source, it is characterized in that, the pulse current gap voltage V between electrode and workpiece to be processed
o>=V
q2+ V
q4+ V
d2+ V
gap, wherein, V
q2be the saturation voltage drop of the second power switch pipe (Q2), V
q4be that the voltage of voltage regulation of the 3rd power switch pipe (Q3) falls, V
d2be the electric conduction pressure drop of the second high voltage isolated diode (D2), V
gapfor discharging gap arcdrop.
8. chopped mode energy-saving electrical according to claim 1 adds working pulse power source, it is characterized in that, described second adjustable DC power supply (2) is less than 0.2 μ s in the working time of each pulse period.
9. chopped mode energy-saving electrical according to claim 1 adds working pulse power source, it is characterized in that,
The current capacity of described first power switch pipe (Q1) and the current capacity of the first high voltage isolated diode (D1) are all less than 10A, and withstand voltage scope is all more than or equal to 600V;
The current capacity of described second power switch pipe (Q2) and the second high voltage isolated diode (D2) is all greater than 100A, the withstand voltage scope of the second power switch pipe (Q2) is more than or equal to 150V, and the withstand voltage scope of the second high voltage isolated diode (D2) is more than or equal to 600V.
10. chopped mode energy-saving electrical according to claim 7 adds working pulse power source, it is characterized in that, also comprises for the pulse current gap voltage V between detecting electrode and workpiece to be processed
otesting circuit (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420842920.3U CN204397103U (en) | 2014-12-25 | 2014-12-25 | A kind of chopped mode energy-saving electrical adds working pulse power source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420842920.3U CN204397103U (en) | 2014-12-25 | 2014-12-25 | A kind of chopped mode energy-saving electrical adds working pulse power source |
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| Publication Number | Publication Date |
|---|---|
| CN204397103U true CN204397103U (en) | 2015-06-17 |
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ID=53421001
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|---|---|---|---|
| CN201420842920.3U Expired - Fee Related CN204397103U (en) | 2014-12-25 | 2014-12-25 | A kind of chopped mode energy-saving electrical adds working pulse power source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475886A (en) * | 2014-12-25 | 2015-04-01 | 西安建筑科技大学 | Chopped-mode energy-saving electromachining pulse power supply |
| CN110091013A (en) * | 2018-01-29 | 2019-08-06 | 上海东熠数控科技有限公司 | Electric spark circuit and electric discharge machining apparatus |
-
2014
- 2014-12-25 CN CN201420842920.3U patent/CN204397103U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475886A (en) * | 2014-12-25 | 2015-04-01 | 西安建筑科技大学 | Chopped-mode energy-saving electromachining pulse power supply |
| CN104475886B (en) * | 2014-12-25 | 2017-02-22 | 西安建筑科技大学 | Chopped-mode energy-saving electromachining pulse power supply |
| CN110091013A (en) * | 2018-01-29 | 2019-08-06 | 上海东熠数控科技有限公司 | Electric spark circuit and electric discharge machining apparatus |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20171225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |