CN206464656U - Double frequency exports the pulse power and Wire EDM equipment - Google Patents
Double frequency exports the pulse power and Wire EDM equipment Download PDFInfo
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- CN206464656U CN206464656U CN201720118122.XU CN201720118122U CN206464656U CN 206464656 U CN206464656 U CN 206464656U CN 201720118122 U CN201720118122 U CN 201720118122U CN 206464656 U CN206464656 U CN 206464656U
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Abstract
A kind of double frequency output pulse power that the utility model is provided, including：Switching power circuit, the first frequency range pulse conversion circuit and the second frequency range pulse conversion circuit；Wherein, the input of the switching power circuit is connected with external ac power source, the switching power circuit is carried out after rectification, copped wave and voltage transformation to the external communication electricity of input, the alternating current of first voltage is exported to the first frequency range pulse conversion circuit, the alternating current of second voltage is exported to the second frequency range pulse conversion circuit；The first frequency range pulse conversion circuit is carried out after rectification and impulse transfer to the alternating current of the first voltage, exports the pulse direct current of the first frequency range；The second frequency range pulse conversion circuit is carried out after rectification and impulse transfer to the alternating current of the second voltage, exports the pulse direct current of the second frequency range.The utility model, so as to effectively reduction energy waste, reduces power attenuation using components such as the traditional appendiron core transformer of switching power circuit substitution and resistance.
Description
Technical Field
The utility model relates to a spark-erosion wire cutting process technology field, concretely relates to dual-frenquency output pulse power source and a spark-erosion wire cutting equipment.
Background
Wire electric discharge machining is performed by removing a workpiece by pulse spark discharge, and since a liquid dielectric does not contact the workpiece, a hard and brittle conductor such as a metal or semiconductor material can be machined by a relatively soft electrode (tool). The wire electrode cutting machining with traveling is the most widely used in the electric discharge machining. The method is particularly suitable for processing high-hardness, high-strength, high-melting point, high-toughness and high-brittleness materials (such as tungsten-molybdenum alloy, memory alloy, magnesium alloy, hard alloy, polycrystalline diamond, neodymium iron boron and the like) which are difficult to be processed by machinery, and is widely applied to processing and manufacturing of precise or special-shaped parts in various fields of die manufacturing, aerospace, medical instruments, instruments and meters, electronic and electrical appliances, mechanical manufacturing and the like.
The conventional pulse power supply reduces 380V voltage provided by an industrial power grid to 75V alternating current voltage through an iron core transformer, and outputs 110V direct current voltage after rectification and filtering; after rectification and filtering, 110V direct current voltage is output, current is limited through a resistor R, then chopped into short-wave-band direct current pulses through a V-MOS power tube, and the short-wave-band direct current pulses are transmitted between a workpiece electrode and a tool electrode to form electric spark discharge.
A large amount of power loss is generated in the voltage reduction process of the iron core transformer:
the primary side of the transformer is coupled to the secondary side to generate exciting current loss, which is about 4% of magnetic loss for short;
secondly, the transformer generates line loss when primary and secondary enameled copper wires transmit voltage, and the copper loss is about 2% for short;
the loss generated by the transformer iron core (silicon steel sheet) in voltage coupling transmission is about 1 percent for short;
and fourthly, when the voltage of the power grid fluctuates (the national standard allowable value is +/-10%), the loss of the under-magnetic saturation and the over-magnetic saturation of the transformer is shortened to be about 2%.
I.e. the total power loss of the buck process is about 9%.
In addition, the cutting process in the discharge circuit has larger loss:
in the process of normal discharge, the power is consumed on a current-limiting resistor R by about 33% loss;
the discharge gap is short-circuited, and the power consumption is about 45% of the current limiting resistor R and the discharge gap.
In summary, the conventional pulse power supply using the iron core transformer has a total loss of about 87% (9% + 33% + 45%), and there is a huge energy waste.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides a dual-frenquency output pulse power supply and spark-erosion wire cutting equipment to reduce pulse power supply's energy waste, reduce power loss.
In a first aspect, the utility model provides a pair of dual-frenquency output pulse power supply, include: the switching power supply circuit comprises a first frequency band pulse conversion circuit and a second frequency band pulse conversion circuit; wherein,
the input end of the switching power supply circuit is connected with an external alternating current power supply, and the switching power supply circuit rectifies, chops and converts the input external alternating current, outputs the alternating current with first voltage to the first frequency band pulse conversion circuit and outputs the alternating current with second voltage to the second frequency band pulse conversion circuit;
the first frequency band pulse conversion circuit rectifies and converts the alternating current of the first voltage into pulses and then outputs pulse direct current of a first frequency band;
and the second frequency band pulse conversion circuit rectifies and converts the alternating current of the second voltage into pulses and then outputs pulse direct current of a second frequency band.
Optionally, the switching power supply circuit includes: the device comprises a rectifying circuit, a chopper circuit and a pulse transformation circuit; wherein,
the input end of the rectifying circuit is connected with an external alternating current power supply, the output end of the rectifying circuit is connected with the input end of the chopper circuit, and the rectifying circuit converts alternating current input from the external alternating current power supply into direct current and outputs the direct current to the chopper circuit when in work;
the output end of the chopper circuit is connected with the input end of the pulse transformation circuit, and the chopper circuit chops the direct current into pulse direct current and outputs the pulse direct current to the pulse transformation circuit when in work;
when the pulse transformation circuit works, the pulse direct current is converted into alternating current with first voltage and alternating current with second voltage, the alternating current with the first voltage is output to the first frequency band pulse transformation circuit, and the alternating current with the second voltage is output to the second frequency band pulse transformation circuit.
Optionally, the external ac power supply is a three-phase ac power supply, and the rectifier circuit includes a three-phase rectifier circuit including a plurality of diodes.
Optionally, the chopper circuit, the first frequency band pulse conversion circuit, and the second frequency band pulse conversion circuit are each composed of at least a diode, a capacitor, an inductor, and a power switching tube.
Optionally, the power switch tube includes a field effect tube, a bipolar insulation effect tube or a thyristor.
Optionally, the field effect transistor includes a VMOS transistor.
Optionally, gates of power switching tubes in the chopper circuit, the first frequency band pulse conversion circuit, and the second frequency band pulse conversion circuit are all connected to the same pulse digital manager, and the pulse digital manager controls switching timing sequences of the power switching tubes in a unified manner.
Optionally, a current sensor and a voltage sensor are arranged at the output end of the first frequency band pulse conversion circuit and the output end of the second frequency band pulse conversion circuit, and both the current sensor and the voltage sensor are connected with the pulse digital manager to respectively feed back current information and voltage information to the pulse digital manager.
Optionally, the dual-frequency output pulse power supply is used for an electric spark wire cutting device;
two output ends of the first frequency band pulse conversion circuit are respectively connected with a machining electrode and a machining workpiece, and two output ends of the second frequency band pulse conversion circuit are respectively connected with the machining electrode and the machining workpiece;
the pulse direct current of the first frequency band output by the first frequency band pulse conversion circuit forms a discharge channel between the machining electrode and the machining workpiece, and the pulse direct current of the second frequency band output by the second frequency band pulse conversion circuit realizes the etching of the machining workpiece when the discharge is carried out between the machining electrode and the machining workpiece.
Second aspect, the utility model provides a pair of spark-erosion wire cutting equipment adopts the utility model provides an arbitrary item double-frenquency output pulse power supply.
The beneficial effects of the utility model reside in that:
the utility model provides a pair of dual-frenquency output pulse power supply, include: the switching power supply circuit comprises a first frequency band pulse conversion circuit and a second frequency band pulse conversion circuit; the input end of the switching power supply circuit is connected with an external alternating current power supply, and the switching power supply circuit rectifies, chops and converts the input external alternating current, outputs the alternating current with first voltage to the first frequency band pulse conversion circuit and outputs the alternating current with second voltage to the second frequency band pulse conversion circuit; the first frequency band pulse conversion circuit rectifies and converts the alternating current of the first voltage into pulses and then outputs pulse direct current of a first frequency band; and the second frequency band pulse conversion circuit rectifies and converts the alternating current of the second voltage into pulses and then outputs pulse direct current of a second frequency band. Compared with the prior art, the utility model discloses a switching power supply circuit replaces components and parts such as traditional iron core transformer and resistance to can effectively reduce the energy extravagant, reduce power loss.
The utility model provides a spark-erosion wire cutting equipment adopts the utility model provides a dual-frenquency output pulse power belongs to the same invention design, has the same beneficial effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic diagram of a dual-frequency output pulse power supply according to a first embodiment of the present invention;
fig. 2 shows a circuit diagram of a dual-frequency output pulse power supply according to a second embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
The utility model provides a double-frequency output pulse power supply and spark-erosion wire cutting equipment. Embodiments of the present invention will be described below with reference to the accompanying drawings.
The first embodiment:
fig. 1 is a schematic diagram of a dual-frequency output pulse power supply according to a first embodiment of the present invention; the utility model discloses a dual-frenquency output pulse power supply that first embodiment provided, include: a switching power supply circuit 1, a first frequency band pulse conversion circuit 2 and a second frequency band pulse conversion circuit 3; wherein,
the input end of the switching power supply circuit 1 is connected with an external alternating current power supply, and the switching power supply circuit 1 rectifies, chops and converts the input external alternating current, outputs the alternating current with a first voltage to the first frequency band pulse conversion circuit 2 and outputs the alternating current with a second voltage to the second frequency band pulse conversion circuit 3;
the first frequency band pulse conversion circuit 2 rectifies and pulse-converts the alternating current of the first voltage and outputs a pulse direct current of a first frequency band;
and the second frequency band pulse conversion circuit 3 rectifies and pulse-converts the alternating current of the second voltage and outputs pulse direct current of a second frequency band.
The switching power supply circuit 1 can be divided into a rectifying circuit 11, a chopper circuit 12 and a pulse transformer circuit 13 according to functions thereof, an input end of the rectifying circuit 11 is connected with an external alternating-current power supply, an output end of the rectifying circuit 11 is connected with an input end of the chopper circuit 12, and the rectifying circuit 11 converts alternating current input from the external alternating-current power supply into direct current and outputs the direct current to the chopper circuit 12 when in work;
the output end of the chopper circuit 12 is connected with the input end of the pulse transformer circuit 13, and the chopper circuit 12 chops the direct current into pulse direct current and outputs the pulse direct current to the pulse transformer circuit 13 when in work;
when the pulse transformation circuit 13 works, the pulse direct current is converted into alternating current with first voltage and alternating current with second voltage, the alternating current with the first voltage is output to the first frequency band pulse transformation circuit 2, and the alternating current with the second voltage is output to the second frequency band pulse transformation circuit 3.
Based on the switching power supply circuit 1, good functions of rectification, filtering, voltage transformation and the like can be realized, so that the traditional circuit consisting of components such as an iron core transformer and a resistor is completely replaced, and the problems of large power loss and serious electric energy waste caused by the iron core transformer and the resistor are solved.
Rectifier circuit 11 is used for being the direct current with external alternating current rectification, and its main component device is diode or thyristor, can adopt single-phase rectifier circuit or three-phase rectifier circuit according to external alternating current power supply's number of phases in a flexible way, can adopt arbitrary kind such as uncontrollable rectifier circuit, half-controlled rectifier circuit, full-controlled rectifier circuit according to actual demand in a flexible way, also can set up to arbitrary form such as half-wave rectifier circuit or bridge rectifier circuit according to circuit structure, and this application does not do specific limitation, and it all is within the protection scope of this application, for example, if external alternating current power supply is three-phase alternating current, then rectifier circuit 11 can adopt a plurality of diodes to set up to simple three-phase.
Chopper circuit 12 mainly used is the pulse direct current with the direct current chopped wave after the rectification, mainly play the effect of filtering, can adopt components and parts such as power switch tube and electric capacity, inductance to realize, wherein, power switch tube mainly plays the effect of chopped wave, the electric capacity mainly plays the effect of energy storage, the inductance also belongs to energy storage device, set up the inductance at the electric capacity front end, in order to restrict the charging current to the electric capacity, avoid the electric capacity to damage, in order to avoid the electric capacity to be punctured by reverse pulse in the charging process, can be a freewheeling diode for the electric capacity parallel connection, in order to play the guard action. There are various implementations of the chopper circuit 12, and a specific example is given in fig. 2, which should be understood by reference to the drawings, but the present invention is not limited to the specific implementation of the present application, and other modified implementations capable of implementing the functions of the chopper circuit 12 provided in the present application are also within the scope of the present application.
For example, in an embodiment provided by the present application, a VMOS (V-groove MOS field effect transistor) is used as the power switch transistor, and the power switch transistor not only has the characteristics of high input impedance (greater than or equal to 108W) and small driving current (about 0.1 μ a), but also has excellent characteristics of high withstand voltage (highest withstand voltage 1200V), large working current (1.5A-100A), high output power (1-250W), good transconductance, fast switching speed, and the like.
The pulse transformation circuit 13 can be implemented by a pulse transformer, so that a good isolation effect can be achieved while the pulse direct current is transformed.
The first frequency band pulse converting circuit 2 and the second frequency band pulse converting circuit 3 may be implemented by using a diode, a capacitor, an inductor, a power switching tube, and the like, where the diode mainly plays a role of rectification, and the power switching tube mainly plays a role of pulse conversion, and there are various implementation manners of the diode and the power switching tube, and a specific example is given in fig. 2, please refer to understand, but it does not limit the specific implementation manner of the present application, and other implementation manners that can implement changes with the same function are also within the protection scope of the present application.
In order to ensure the coordinated operation of the switching power supply circuit 1, the first frequency band pulse converting circuit 2 and the second frequency band pulse converting circuit 3, in an embodiment provided in the present application, gates of power switching tubes in the chopper circuit 12, the first frequency band pulse converting circuit 2 and the second frequency band pulse converting circuit 3 are all connected to the same pulse digital manager, and the pulse digital manager uniformly controls a switching timing sequence of each power switching tube so as to output rated pulse direct current of the first frequency band and pulse direct current of the second frequency band as required.
The pulse digital manager can be realized by adopting a single chip microcomputer, a PLC and the like, for example, the pulse digital manager can be realized by adopting a common 51 single chip microcomputer.
In order to ensure the stable operation of the pulse digital manager, in an embodiment provided in the present application, a current sensor and a voltage sensor are disposed at the output end of the first frequency band pulse conversion circuit 2 and the output end of the second frequency band pulse conversion circuit 3, and both the current sensor and the voltage sensor are connected to the pulse digital manager to respectively feed back current information and voltage information to the pulse digital manager, so that the pulse digital manager flexibly adjusts the management and control scheme according to the feedback information.
The utility model discloses above do the utility model discloses a double-frenquency output pulse power's that the first embodiment provided embodiment explains, compare in prior art, the utility model discloses a switching power supply circuit 1 replaces components and parts such as traditional iron core transformer and resistance, and whole circuit can realize not having the resistance ization to can avoid the power loss that iron core transformer and resistance produced, reduce the electric energy waste effectively, reduce power loss. In addition, because whole circuit structure integrates the degree height, each components and parts small in size that adopts, compare in the traditional pulse power supply who adopts iron core transformer (especially iron core transformer's volume is great), the volume can effectively reduce about 40%.
It should be noted that the dual-frequency output pulse power supply provided by the present application may be applied to any electronic and electrical device that needs dual-frequency output pulse to reduce power loss and waste of electric energy, for example, the dual-frequency output pulse power supply may be applied to a wire cut electrical discharge machine, a pulse laser device, and the like. In one embodiment provided by the present application, the dual frequency output pulsed power supply is used in a wire electric discharge machine;
two output ends of the first frequency band pulse conversion circuit 2 are respectively connected with a machining electrode and a machining workpiece, and two output ends of the second frequency band pulse conversion circuit 3 are respectively connected with the machining electrode and the machining workpiece;
the pulse direct current of the first frequency channel of first frequency channel pulse converting circuit 2 output is in the processing electrode with form the discharge channel between the processing work piece, the pulse direct current of the second frequency channel of second frequency channel pulse converting circuit 3 output is in the processing electrode with it is right to realize when discharging between the processing work piece the sculpture of processing work piece, wherein, the pulse direct current of first frequency channel can be the pulse direct current of shortwave frequency channel (3MHz-30MHz), the pulse direct current of second frequency channel can be the pulse direct current of microwave frequency channel (300MHz-300 GHz).
Second embodiment:
referring to fig. 2, fig. 2 is a circuit diagram of a dual-frequency output pulse power supply according to a second embodiment of the present invention, which provides a specific embodiment applied to a wire-cut electric discharge machine, and can be understood by combining the description of the first embodiment, which will be only briefly described here.
In fig. 2, symbols of components are general symbols in the technical field of electronic circuits, D denotes a diode, L denotes an inductor, TR denotes a power switching tube, U denotes a pulse digital manager (a plurality of U in the figure are the same), T denotes a pulse transformer, C denotes a capacitor, an external power supply is a 380V ac power supply, a dashed frame is used in the figure to divide the circuit (please understand in conjunction with the description of the first embodiment), and specific connection relationships are shown in the figure.
In the second embodiment, the dual-frequency output pulse power supply is provided, and the rectifier circuit 11, the chopper circuit 12 and the pulse transformer circuit 13 together form an AC → DC → AC step-down type alternating current switching power supply, which can replace an iron core transformer. The working principle is as follows: 380V Alternating Current (AC) voltage fed by a power grid is rectified by a diode to be converted into Direct Current (DC) voltage, then the Direct Current (DC) voltage is limited by an inductor L1 and is charged into a capacitor C1 by a power switch tube TR1, the capacitor C1 is charged and then is discharged into a high-frequency pulse transformer T by a power switch tube TR2, high-frequency Direct Current (DC) pulse formed by discharging is fed to a negative side by a primary side of the pulse transformer T, and is output to a first frequency band pulse conversion circuit 2, namely, 75V alternating current, and is output to a second frequency band pulse conversion circuit 3, namely, 30V alternating current.
The pulse digital manager U adopts a PWM pulse digital manager, controls the on and off of TR1 and TR2 according to the voltage of a linear cutting discharge gap, current detection and feedback information of a cellular current sensing VMOS (power switch tube), and realizes the real-time control of the charging and discharging frequency and time sequence of the capacitor C1. Thereby realizing that:
1. the voltage stabilizing function of the fluctuation rate of the power grid voltage +/-10 percent and the voltage stabilizing function of the discharge gap current;
2. and when the discharge gap is short-circuited, the power output of the TR1 is turned off, so that the electric energy is saved.
The first frequency band pulse conversion circuit 2 and the second frequency band pulse conversion circuit 3 construct an energy-optimized linear cutting pulse loop, namely, an inductor L2 is adopted to limit the charging current of a TR3 to a capacitor C2, after a capacitor C2 is charged, a TR4 is used to limit the feeding of high-voltage (110V) direct current pulses of a short-wave frequency band to spark discharge gaps (machining electrodes and workpiece electrodes) through an L3, so that time constants of a discharge channel and a maintenance discharge channel are matched with the time constant of a motion controller, the motion rhythm of each motion axis is controlled, and the rapid and effective gap servo function is realized. At the moment when the pulse fed to the spark discharge gap by TR4 forms a discharge channel, the voltage on C3 is fed to the discharge gap by TR6 as a direct current pulse in the microwave frequency band, and the electron current working in the microwave frequency band oscillates at a high speed and is heated to remove the workpiece material in a cluster stripping manner at a high frequency, thereby realizing excellent process indexes of the integrity of the machined surface.
The switching frequency and the timing of TR3, TR4, TR5 and TR6 are controlled by the PWM pulse digital manager in real time according to the information of the detection feedback of the spark discharge gap and the cellular current sensing VMOS.
In the dual-frequency output pulse power supply for the wire-cut electric discharge machine provided by the second embodiment, the switch power supply is adopted to replace an iron core transformer, the technical scheme of digital management of the PWM pulse is applied, and the resistance-free circuit, the cellular current sensing VMOS power tube and the control technology thereof are adopted, so that the power output is closed when the gap is short-circuited. The power loss of the high-speed switch stabilized power supply is less than 5%, the power loss of a resistor-free circuit is less than 1%, the power loss during gap short circuit is less than 1%, the comprehensive power loss is less than about 7%, and the pulse power supply can save more than 80% of electric energy compared with the traditional pulse power supply adopting an iron core transformer and a resistor.
And the volume is reduced to 40% of that of the traditional pulse power supply, and the electrical impedance of the power grid and the discharge gap is reasonably matched, so that the electromagnetic radiation quantity of the whole machine is greatly reduced, and the personal health is protected.
The utility model also provides an electric spark wire cutting equipment, electric spark wire cutting equipment adopts the utility model provides an arbitrary item double-frenquency output pulse power supply. The wire cut electric discharge machine can be cutting equipment such as a numerical control machine tool.
The utility model provides an electric spark wire-electrode cutting equipment adopts the utility model provides a dual-frenquency output pulse power belongs to the same invention design, has the same beneficial effect, and here is no longer repeated.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the present invention. Are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A dual frequency output pulsed power supply, comprising: the switching power supply circuit comprises a first frequency band pulse conversion circuit and a second frequency band pulse conversion circuit; wherein,
the input end of the switching power supply circuit is connected with an external alternating current power supply, and the switching power supply circuit rectifies, chops and converts the input external alternating current, outputs the alternating current with first voltage to the first frequency band pulse conversion circuit and outputs the alternating current with second voltage to the second frequency band pulse conversion circuit;
the first frequency band pulse conversion circuit rectifies and converts the alternating current of the first voltage into pulses and then outputs pulse direct current of a first frequency band;
and the second frequency band pulse conversion circuit rectifies and converts the alternating current of the second voltage into pulses and then outputs pulse direct current of a second frequency band.
2. The dual-frequency output pulsed power supply of claim 1, wherein said switching power supply circuit comprises: the device comprises a rectifying circuit, a chopper circuit and a pulse transformation circuit; wherein,
the input end of the rectifying circuit is connected with an external alternating current power supply, the output end of the rectifying circuit is connected with the input end of the chopper circuit, and the rectifying circuit converts alternating current input from the external alternating current power supply into direct current and outputs the direct current to the chopper circuit when in work;
the output end of the chopper circuit is connected with the input end of the pulse transformation circuit, and the chopper circuit chops the direct current into pulse direct current and outputs the pulse direct current to the pulse transformation circuit when in work;
when the pulse transformation circuit works, the pulse direct current is converted into alternating current with first voltage and alternating current with second voltage, the alternating current with the first voltage is output to the first frequency band pulse transformation circuit, and the alternating current with the second voltage is output to the second frequency band pulse transformation circuit.
3. The dual frequency output pulsed power supply of claim 2, wherein said external ac power supply is a three-phase ac power, and said rectifying circuit comprises a three-phase rectifying circuit composed of a plurality of diodes.
4. The dual-frequency output pulse power supply of claim 2, wherein the chopper circuit, the first frequency band pulse conversion circuit and the second frequency band pulse conversion circuit are each composed of at least a diode, a capacitor, an inductor and a power switch tube.
5. The dual-frequency output pulse power supply of claim 4, wherein the power switch tube comprises a field effect transistor, a bipolar isolation effect transistor or a thyristor.
6. The dual-frequency output pulsed power supply of claim 5, wherein said field effect transistor comprises a VMOS transistor.
7. The dual-frequency output pulse power supply according to claim 4, wherein gates of power switching tubes in the chopper circuit, the first frequency band pulse conversion circuit and the second frequency band pulse conversion circuit are all connected to a same pulse digital manager, and the pulse digital manager controls switching timing of the power switching tubes in a unified manner.
8. The dual-frequency output pulse power supply according to claim 7, wherein a current sensor and a voltage sensor are disposed at an output end of the first frequency band pulse conversion circuit and an output end of the second frequency band pulse conversion circuit, and both the current sensor and the voltage sensor are connected to the pulse digital manager to feed back current information and voltage information to the pulse digital manager, respectively.
9. The dual-frequency output pulsed power supply of claim 1, wherein the dual-frequency output pulsed power supply is for a wire electric discharge machine;
two output ends of the first frequency band pulse conversion circuit are respectively connected with a machining electrode and a machining workpiece, and two output ends of the second frequency band pulse conversion circuit are respectively connected with the machining electrode and the machining workpiece;
the pulse direct current of the first frequency band output by the first frequency band pulse conversion circuit forms a discharge channel between the machining electrode and the machining workpiece, and the pulse direct current of the second frequency band output by the second frequency band pulse conversion circuit realizes the etching of the machining workpiece when the discharge is carried out between the machining electrode and the machining workpiece.
10. A wire electric discharge machine characterized by using the dual-frequency output pulse power supply according to any one of claims 1 to 9.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238468A (en) * | 2019-07-25 | 2019-09-17 | 北京东兴润滑剂有限公司 | Reinforcing clast chip removal method for electrical discharge machining |
| CN110814448A (en) * | 2019-11-25 | 2020-02-21 | 合肥工业大学 | Centralized rectification and voltage transformation distributed chopping pulse power supply |
| CN110977066A (en) * | 2019-11-25 | 2020-04-10 | 合肥工业大学 | Multichannel parallel trigger type high-frequency pulse power supply |
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2017
- 2017-02-08 CN CN201720118122.XU patent/CN206464656U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238468A (en) * | 2019-07-25 | 2019-09-17 | 北京东兴润滑剂有限公司 | Reinforcing clast chip removal method for electrical discharge machining |
| CN110238468B (en) * | 2019-07-25 | 2020-11-17 | 北京东兴润滑剂有限公司 | Reinforced chip removal method for electric spark machining |
| CN110814448A (en) * | 2019-11-25 | 2020-02-21 | 合肥工业大学 | Centralized rectification and voltage transformation distributed chopping pulse power supply |
| CN110977066A (en) * | 2019-11-25 | 2020-04-10 | 合肥工业大学 | Multichannel parallel trigger type high-frequency pulse power supply |
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