CN101030706A - Parallel device of inverter - Google Patents
Parallel device of inverter Download PDFInfo
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- CN101030706A CN101030706A CN 200610058718 CN200610058718A CN101030706A CN 101030706 A CN101030706 A CN 101030706A CN 200610058718 CN200610058718 CN 200610058718 CN 200610058718 A CN200610058718 A CN 200610058718A CN 101030706 A CN101030706 A CN 101030706A
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Abstract
The invention is concerned with the inverse-change power parallel connection equipment, consists of the power source and the filter that prevent power source pollution, the rectification circuit, the filter circuit, the buffer delay circuit, the excitation pulse forming circuit and the protecting controlling circuit, the inverse-change circuit, the rectification and filter circuit, the series connection outputting collecting line, the inverse-change circuit is more that two that is single-side inverse-change circuit or the whole-bridge inverse-change circuit, the inverse-change circuit uses the leakage inductance transformer as the outputting transformer.
Description
Technical field
The present invention relates to a kind of inverter, relate in particular to a kind of inverse power supply parallel device.
Background technology
Have in the inverter of higher inversion frequency (more than the 50KHz) in employing, mainly use high-power field-effect transistor (MOSFET) and IGBT module.In order to realize bigger power output, often need working method (inversion unit parallel connection) with parallel operation.The inversion unit parallel connection requires each unit in parallel in full accord in real time in output voltage, phase place in theory, but because actual unit in parallel can not be in full accord, way in parallel (generally within 6) more for a long time, very easily cause device damage to cause failure in parallel.
The patent No. is 200420071487.4, and name is called " ac inverter shunting means " and has proposed a kind of inverse power supply parallel device, realizes multi-machine parallel connection.But this device has used the Centralized Controller of an output SPWM signal, also needs to comprise the direct current flow equalizing circuit in the inversion module, and structure is complicated.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose a kind of inverse power supply parallel device that is simple and easy to realize, realized the unitization of inverter.
Technical scheme of the present invention is achieved in that inverse power supply parallel device comprises power supply and prevents the filter of power pollution; rectification, filtering and buffering delay circuit; driving pulse forms and the protection control circuit; inverter circuit; rectification, filter circuit, output in parallel gathers line, and wherein said inverter circuit is greater than 2; be monolateral inverter circuit or full bridge inverter, inverter circuit uses leakage inductance transformer as output transformer.
Described leakage inductance transformer comprises magnetic core, fixed support, elementary winding, inferior utmost point winding, and wherein said magnetic core is placed on the fixed support, and on magnetic core, secondary winding is around the home on elementary winding around the home for elementary winding.
The present invention has following superior effect:
1. high efficiency, the work gross efficiency can reach more than 80%.
2. have Short Circuit withstand and the strong characteristics of continuous operation ability.
3. structurally basic identical with general inverter circuit, do not need to build in addition production line, can effectively reduce and make cost of the present invention.
4. simple in structure, do not need other auxiliary circuit.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Fig. 2 is a monolateral inverter circuit schematic diagram of the present invention.
Fig. 3 is a full bridge inverter schematic diagram of the present invention.
Fig. 4 is a leakage inductance transformer profile of the present invention.
Fig. 5 is a leakage inductance transformer left view of the present invention.
Fig. 6 is an inverter circuit output VA characteristic curve of the present invention.
Embodiment
Below in conjunction with specific embodiment the present invention is described in further detail:
As shown in Figure 1, inverse power supply parallel device comprises power supply and prevents the filter 1 of power pollution, rectification, filtering and buffering delay circuit 2, and driving pulse forms and protects control circuit 3, inverter circuit 4, rectification, filter circuit 5, output in parallel gathers line 6.
Power supply and prevent the filter 1 of power pollution wherein, rectification, filtering and buffering delay circuit 2, driving pulse form and protection control circuit 3, rectification, filter circuit 5, output in parallel gathers line 6 and is universal circuit.
Inverter circuit 4, is exported to dozens of is in parallel by several according to the different requirements of equipment power output greater than 2.
Inverter circuit 4 can be monolateral inverter circuit or full bridge inverter, as Fig. 2, shown in Figure 3, uses leakage inductance transformer B1 as output transformer.
As shown in Figure 2, when using monolateral inverter circuit, BG1, BG2 are controlled by the same-phase pulse, finish the synchro switch action; At BG1, when BG2 opens, leakage inductance transformer time utmost point output work done, the elementary energy stored of leakage inductance transformer reclaims this part energy by D1, the D2 shunt capacitance charging in power supply Ec when BG1, BG2 turn-off, and this moment, the inferior utmost point of leakage inductance transformer was not exported as energy.The employed inverter circuit of sort circuit does not carry out filtering at output, but directly exports the high power DC pulse, can be used in high-frequency high-power pulse plating power supply and the fast-pulse charging device.
As shown in Figure 3, when using full-bridge circuit work, BG1, BG4 and BG2, BG3 carry out switch work alternately.Use identical leakage inductance transformer, the power output of the comparable monolateral inverter circuit of power output of full bridge inverter is big four times.Therefore, the parallel connection of full bridge inverter combination is more suitable for being used for equipment such as inversion direct current arc welder.
More than the inverter circuit of any circuit form when parallel operation, leakage inductance transformer is the Primary Component of circuit success or not, after using leakage inductance transformer, inferior pole tension has bigger electric voltage dropping (within scope of design) with the increase of power output, after a plurality of inverter circuit parallel connections, if wherein a certain inverter circuit power output is bigger, the electric voltage dropping of this circuit self then, make it to reach automatically the output balance with other inverter circuit, have good consistency when testing 40 road inverter circuit parallel operations.The inverter circuit output characteristic is seen Fig. 4.
As Fig. 5, shown in Figure 6, leakage inductance transformer comprises magnetic core 11, fixed support 12, elementary winding 13, inferior utmost point winding 14, wherein said magnetic core 11 is placed on the fixed support 12, and on magnetic core 11, secondary winding 14 is around the home on elementary winding 14 around the home for elementary winding 13.
Determining of leakage inductance transformer power P:
P＝S1·S2·f·B/0.72×10
6--------(1)
In the formula: S1: the magnetic core sectional area
S2: the product of core length and two magnetic core spacings
F: transformer operating frequency
B: the magnetic flux density of magnetic core
When selecting the magnetic core of MXO-800, diameter 10mm length 180mm for use, the power output P of transformer can reach 1000W according to formula (1).
Elementary umber of turn is with reference to formula (2):
T/V＝10
8/4.44×f·B·S2?-----------(2)
Or: T=10
8/ 4.44 * fBS2V
In the formula: V: supply voltage
T: number of primary turns
When supply voltage was direct current 500V, elementary umber of turn should be 〉=180 circles, because the existence of leakage inductance causes the primary electrical sensibility reciprocal less, umber of turn increases and is twice i.e. 2 * 180 circles in actual use.
The secondary winding number of turn: according to the requirement of output voltage, by just, the no-load voltage ratio of the inferior utmost point determines, at the outer enamelled wire of elementary winding with φ 0.83,8 strands and around 2 * 19 circles.
In 500A dc inversion electric welding machine, by 30 groups of inversion unit parallel runnings, operating frequency is 100KHz, and working power is used civil power 380V three-phase alternating current, powers with direct current 500V after full-bridge rectification.It is 500A that output voltage should be direct current 40V output-current rating.Gross output 20KW, this moment, each inversion unit power output was 666.7 watts.
Being applied in the MOSFET inversion type direct-current welding machine of the method success of employing inverter circuit parallel connection.MOSFET in 30 inversion units works in the synchro switch state of 100 KHz, 20 kilowatts of power outputs (500 amperes, 40 volts of direct currents), and the work gross efficiency can reach more than 80% (surveys about 85%).Have advantages such as Short Circuit withstand and continuous operation ability are strong simultaneously.
With the DC pulse electroplating power supply of the method design, empirical tests is under the operating state of 100 KHz, and comparing coating with conventional electroplating power supply has tangible change; The obvious refinement of Electronic Speculum crystal display cell.
Specific embodiment of the present invention elaborates summary of the invention.For persons skilled in the art, any conspicuous change of under the prerequisite that does not deviate from the principle of the invention it being done can not exceed the protection range of the application's claim.
Claims (5)
1. inverse power supply parallel device; comprise power supply and prevent the filter of power pollution; rectification, filtering and buffering delay circuit; driving pulse forms and the protection control circuit; inverter circuit, rectification, filter circuit, output in parallel gathers line; wherein said inverter circuit is characterized in that greater than 2: described inverter circuit uses leakage inductance transformer as output transformer.
2. inverse power supply parallel device according to claim 1, it is characterized in that: described leakage inductance transformer comprises magnetic core, fixed support, elementary winding, inferior utmost point winding, wherein said magnetic core is placed on the fixed support, and elementary winding technique is on magnetic core, and secondary winding is wound on the elementary winding.
3. inverse power supply parallel device according to claim 2 is characterized in that: the magnetic core of described leakage inductance transformer is two, does not contact mutually, parallel being placed on the fixed support.
4. according to claim 2 or 3 described inverse power supply parallel devices, it is characterized in that: the magnetic core of described leakage inductance transformer is cylindrical.
5. according to claim 2 or 3 described inverse power supply parallel devices, it is characterized in that:
Elementary umber of turn T is:
T=10
8/ 4.44 * fBS2V, f are the transformer operating frequency, and B is the magnetic flux density of magnetic core, and S2 is the product of core length and two magnetic core spacings, and V is a supply voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610058718 CN101030706A (en) | 2006-03-03 | 2006-03-03 | Parallel device of inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610058718 CN101030706A (en) | 2006-03-03 | 2006-03-03 | Parallel device of inverter |
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| CN101030706A true CN101030706A (en) | 2007-09-05 |
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| CN 200610058718 Pending CN101030706A (en) | 2006-03-03 | 2006-03-03 | Parallel device of inverter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102449897A (en) * | 2009-05-29 | 2012-05-09 | 通用电气公司 | Method and apparatus for electrical bus centering |
| CN108054925A (en) * | 2015-06-23 | 2018-05-18 | 张琴 | Supply unit and method of work based on phase-shifting carrier wave technology reactive filter |
| JP2023505974A (en) * | 2019-12-18 | 2023-02-14 | ベイジン・ナウラ・マイクロエレクトロニクス・イクイップメント・カンパニー・リミテッド | Control circuits, pulse power systems and semiconductor processing equipment |
-
2006
- 2006-03-03 CN CN 200610058718 patent/CN101030706A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102449897A (en) * | 2009-05-29 | 2012-05-09 | 通用电气公司 | Method and apparatus for electrical bus centering |
| CN108054925A (en) * | 2015-06-23 | 2018-05-18 | 张琴 | Supply unit and method of work based on phase-shifting carrier wave technology reactive filter |
| JP2023505974A (en) * | 2019-12-18 | 2023-02-14 | ベイジン・ナウラ・マイクロエレクトロニクス・イクイップメント・カンパニー・リミテッド | Control circuits, pulse power systems and semiconductor processing equipment |
| JP7382507B2 (en) | 2019-12-18 | 2023-11-16 | ベイジン・ナウラ・マイクロエレクトロニクス・イクイップメント・カンパニー・リミテッド | Control circuits, pulse power systems and semiconductor processing equipment |
| US11955313B2 (en) | 2019-12-18 | 2024-04-09 | Beijing Naura Microelectronics Equipment Co., Ltd. | Control circuit, pulsed power supply system, and semiconductor processing equipment |
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Effective date of abandoning: 20070905 |
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