CN101436808B - Double three-phase winding electric welding generator - Google Patents
Double three-phase winding electric welding generator Download PDFInfo
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- CN101436808B CN101436808B CN2008101875310A CN200810187531A CN101436808B CN 101436808 B CN101436808 B CN 101436808B CN 2008101875310 A CN2008101875310 A CN 2008101875310A CN 200810187531 A CN200810187531 A CN 200810187531A CN 101436808 B CN101436808 B CN 101436808B
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Abstract
The invention relates to a welding generator, in particular to a double three-phrase winding welding generator, which comprises a rotor coil, a stator core provided with a stator slot and a main winding embedded in the stator slot, wherein the main winding adopts two groups of identical three-phrase windings. Outputs of the two groups of three-phrase windings are connected parallelly to be outputafter passing through a rectifying unit respectively. By adopting double three-phrase windings and full-wave rectification, the generator increases output power of a generation part without increasing volume. In addition, due to a controller with a current signal control circuit and a voltage signal control circuit, the welding current of the generator can be adjusted accurately, the external characteristic of steep dipping of the welding generator is ensured and the arc interruption is also ensured to not occur during welding with low current.
Description
Technical field
The present invention relates to a kind of welding generator, particularly a kind of double three-phase winding electric welding generator.
Background technology
At present, the welding generator group that dependable performance, cost are low, sturdy and durable, have generating and electric welding function concurrently is badly in need of in field works such as petroleum industry, building industry, bridge construction, mining industry.In addition, decorations industry and advertising also need to be equipped with welding generator, to adapt to the needs of different occasions.With " the West-east Gas engineering is an example, about 3000 kilometers of its pipeline total length, as to establish every tube length be 50 meters, then needs 60000 pipes, then has 120000 place's joints to need welding.Establish a welding machine as two kilometers, then need 1500 of welding machines altogether.The market demand of electric welding electricity generation two-purpose machine has some idea of.
In view of at present existing be power with the general gasoline engines, as emergent, the electric welding of reserve purposes, the generating dual-purpose generator, in use owing to adopt the mode and motor six half-wave output mutually of disk resistance adjustment exciting current, current commutates must (volume be big with reactor, temperature rise) flat ripple etc. self limitation, causing in the complete machine use exists stability of the welding quality poor, arcing time factor is on the low side, easy current interruption when using little electric current (less than 80A time) welding, the surface condition of workpiece is easy to influence welding current and changes and welding arc is interrupted, volume is big and the power generation part power output is less only is 2000 watts, can not satisfy user's problems such as demand.
Summary of the invention
The present invention has overcome above-mentioned shortcoming, and the double three-phase winding electric welding generator of a kind of power output height, stable performance is provided.
The present invention solves the technical scheme that its technical problem takes: a kind of double three-phase winding electric welding generator, comprise rotor coil, be provided with the stator core and the main winding that is inlaid in the described stator slot of stator slot, described main winding adopts two groups of three identical phase windings, the output of described two group of three phase winding is respectively through being connected in parallel behind the rectification unit and exporting, also comprise a controller, described controller comprises the current sensor that connects successively, the current signal control circuit, phase-shift trigger circuit, the exciting current control circuit, described exciting current control circuit output connects described rotor coil; Also be provided with the auxiliary winding that is used to detect the generating output voltage on the described stator core, described controller comprises the voltage signal control circuit, and the output of described auxiliary winding is connected to described phase-shift trigger circuit through described voltage signal control circuit.
Described rectification unit is the full-wave rectifying circuit that links to each other with each phase winding output respectively.
Be evenly distributed with 24 stator slots on the described stator core, described every group three phase winding takies 12 stator slots, constitute single layer winding, or every group takies 24 stator slots, constitutes two layer winding.
Differ 30 ° of phase angles between described two groups of windings.
Described controller also comprises the flywheel coil, and the input of described flywheel coil is connected the input of described phase-shift trigger circuit.
The present invention adopts two three phase windings, adopts full-wave rectification, increases the power output of power generation part under the prerequisite that does not increase volume.In addition,, can accurately adjust the electric welding electric current of generator, guarantee that welding generator has the external characteristic of falling suddenly, guarantee when little electric current welds, not produce the current interruption phenomenon by having the controller of current signal control circuit and voltage signal control circuit.
Description of drawings
Fig. 1 is a stator core structure schematic diagram of the present invention;
Fig. 2 is the theory diagram of middle controller of the present invention;
Fig. 3 is the circuit theory diagrams of middle controller of the present invention.
Embodiment
The present invention mainly comprises the stator core that is provided with stator slot, be inlaid in main winding and auxiliary winding, rotor coil in the described stator slot, be installed in parts such as flywheel coil on the generator flywheel and controller.
Described stator core is evenly distributed with 24 stator slots as shown in fig. 1, and the employing external diameter is 204mm, and 24 the groove stator punching is overlapping forms, and compares original 36 groove stator cores, has increased core area, has promptly improved the efficient of generator.And described main winding adopts two groups of three identical phase windings, differs 30 ° of phase angles between described two groups of windings.After the output of described two group of three phase winding was carried out full-wave rectification through full-wave rectifying circuit respectively, welding equipment was exported in parallel connection.Adopt two groups of three identical phase windings, promptly two three-phase full-wave output modes, three phase full wave rectification is carried out with two rectification modules in welding current output back, the twice when making the ripple frequency (720HZ) of exporting direct current be six phase half-wave (360HZ) rectifications.Because the number of phases of rectification circuit is many more, the ripple frequency in the commutating voltage is higher, and its amplitude is more little, and the approaching more desirable direct voltage of weldingvoltage so can cancel reactor and six-phase half wave rectifier, makes the direct current waveform make the super dc waveform that is bordering on.Thereby the variation that has solved the welding object of continuous variation and environmental condition all requires this difficult problem of external characteristic of different steepness, improved simultaneously the welding machine arcing time factor (from before 40% bring up to 80%).Increase than six phase half-wave patterns just because of ripple frequency and to be twice, and the flutter component of output is much smaller, and then reach the purpose that improves welding arcing time factor and overall efficiency, improve the reliability of rectifier.Thereby under the condition of equal stator core length, equal power input, the generating power output of the generator that is multiplied.Make the stator power generating part exchange output and increase to 4KW interchange output by original 2KW.In the described main winding, every group three phase winding takies 12 stator slots, constitute single layer winding, or every group takies 24 stator slots, constitutes two layer winding.
As shown in Figure 2, described controller comprises current sensor, current signal control circuit, phase-shift trigger circuit, the exciting current control circuit that connects successively, and described exciting current control circuit output connects described rotor coil.The described output that is used to detect the auxiliary winding of generating output voltage is connected to described phase-shift trigger circuit through described voltage signal control circuit.The input of described flywheel coil is connected the input of described phase-shift trigger circuit.
As shown in Figure 3, described flywheel coil is the power coil that is installed on the flywheel, drives rotor rotation by flywheel, produces the rotor field by flywheel coil L1, sets up the initial magnetic field through R17, D11 to generator.Auxiliary winding provides AC115V field power supply for generator.
Resistance R 1-R6, the full-wave rectifier, triode Q1, the capacitor C 1-3 that are made of D1-D4 form the current signal control circuit.The current sensor (can adopt the current transformer that is sleeved on the phase winding) that is installed in the main winding output detects main winding, it is the electric current of electric welding machine output, and be transformed to voltage signal through current sensor L, by resistance R 2 conditioning signal powers (adjusting welding current), this signal provides control signal by D1-D4 full-wave rectification, capacitor C 2 filtering to subsequent conditioning circuit again.One the tunnel is divided to triode Q1 through R4, R5, when welding current increases, the Q1 equiva lent impedance diminishes the triode Q2 collector current in the phase-shift trigger circuit is increased, controllable silicon Q3, the Q4 angle of flow controlled in the described exciting current control circuit increase, and then the exciting current increase of rotor coil L2 is exported in control, welding current is risen rapidly, play the effect of the easy starting the arc.To Q2, when welding current reaches the setting electric current, this signal will limit the increase of Q2 collector current through D5, R7 on another road, thereby accurately welding current is controlled in the segmentation adjustment.
Described phase-shift trigger circuit mainly is made of triode Q2 and capacitor C 7, two-stage controllable silicon Q3 when triode Q2 conducting in the control exciting current control circuit, the angle of flow of Q4, change the angle of flow by controllable silicon Q4 rectification, the exciting current of control electric generator rotor coil.
Described auxiliary winding obtains the output voltage that is directly proportional with main winding, and then know the voltage fluctuation of main winding output, but by the voltage signal control circuit regulated output voltage of R11, D8, R12, Z1 formation, and by regulating resistance R 9, again through R8, R10, Q2 control generating output voltage.
Because when manual electric welding, the voltage of electric welding machine should be reduced to about 70 volts automatically after welding rod contacted with workpiece.Promptly require electric welding machine to have the external characteristic of falling suddenly.Just space out after the starting the arc, this moment, voltage should maintain about 27 volts.Constantly the variation of welding object that changes and environmental condition all requires the external characteristic of different steepness, the difficult point of research and development external characteristic adjusting device that Here it is.And, because workpiece, the different-diameter welding rod of different-thickness in use require welding machine that different welding currents is provided, need do many experimental study work to this, make the standard of electric welding electric current then, develop electronic voltage regulator more based on this, thereby comparatively accurately the electric welding electric current of electric welding machine is adjusted in segmentation.
Controller among the present invention is taken a sample respectively by the voltage and current to motor, adopts feedback regulation exciting current behind the silicon controlled rectifier, thereby voltage and electric current can keep constant problem when fundamentally having solved little electric current welding.Adopt this people's controller to regulate and electric current when controlling electric welding, the more convenient disk resistance of also having cancelled reactor and having regulated exciting current during use.Welding quality is higher, current interruption phenomenon in the time of can overcoming the welding of little electric current.
More than double three-phase winding electric welding generator provided by the present invention is described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (5)
1. double three-phase winding electric welding generator, it is characterized in that: comprise rotor coil, be provided with the stator core of stator slot and be inlaid in main winding in the described stator slot, described main winding adopts two groups of three identical phase windings, the output of described two group of three phase winding is respectively through being connected in parallel behind the rectification unit and exporting, also comprise a controller, described controller comprises current sensor, current signal control circuit, phase-shift trigger circuit, the exciting current control circuit that connects successively, and described exciting current control circuit output connects described rotor coil; Also be provided with the auxiliary winding that is used to detect the generating output voltage on the described stator core, described controller comprises the voltage signal control circuit, and the output of described auxiliary winding is connected to described phase-shift trigger circuit through described voltage signal control circuit.
2. double three-phase winding electric welding generator according to claim 1 is characterized in that: the full-wave rectifying circuit of described rectification unit for linking to each other with each phase winding output respectively.
3. double three-phase winding electric welding generator according to claim 1 is characterized in that: be evenly distributed with 24 stator slots on the described stator core, described every group three phase winding takies 12 stator slots, constitute single layer winding, or every group takies 24 stator slots, constitutes two layer winding.
4. double three-phase winding electric welding generator according to claim 1 is characterized in that: differ 30 ° of phase angles between described two groups of windings.
5. double three-phase winding electric welding generator according to claim 4 is characterized in that: described controller also comprises the flywheel coil, and the input of described flywheel coil is connected the input of described phase-shift trigger circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101875310A CN101436808B (en) | 2008-12-25 | 2008-12-25 | Double three-phase winding electric welding generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101875310A CN101436808B (en) | 2008-12-25 | 2008-12-25 | Double three-phase winding electric welding generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101436808A CN101436808A (en) | 2009-05-20 |
| CN101436808B true CN101436808B (en) | 2011-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101875310A Expired - Fee Related CN101436808B (en) | 2008-12-25 | 2008-12-25 | Double three-phase winding electric welding generator |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195370B (en) * | 2011-05-18 | 2013-10-23 | 哈尔滨工业大学 | Permanent magnet generator system with variable leakage reactance and large rotating speed range output |
| CN105375666A (en) * | 2014-12-04 | 2016-03-02 | 深圳市高瓴科技有限公司 | Novel super power motor |
| CN110661460B (en) * | 2019-11-13 | 2022-02-22 | 陕西航空电气有限责任公司 | Digital voltage regulating device of wide frequency conversion alternating current generator for aviation |
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- 2008-12-25 CN CN2008101875310A patent/CN101436808B/en not_active Expired - Fee Related
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