CN201616768U - Intermediate-frequency power circuit - Google Patents
Intermediate-frequency power circuit Download PDFInfo
- Publication number
- CN201616768U CN201616768U CN2010201888953U CN201020188895U CN201616768U CN 201616768 U CN201616768 U CN 201616768U CN 2010201888953 U CN2010201888953 U CN 2010201888953U CN 201020188895 U CN201020188895 U CN 201020188895U CN 201616768 U CN201616768 U CN 201616768U
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- frequency power
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- inversion
- thyristors
- power supply
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- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Inverter Devices (AREA)
Abstract
The utility model relates to an intermediate-frequency power circuit which comprises a bridge rectifier, a filtering unit, an inversion unit, a follow current unit and a resonance capacitor group which are sequentially connected in parallel, and further comprises a resonance inductor, wherein the inversion unit comprises two inversion thyristors connected in series; the resonance capacitor group comprises two resonance capacitors connected in series; and one end of the resonance inductor is connected between the two inversion thyristors, while the other end is connected between the two resonance capacitors. Through the adoption of the mode of the series connection of the inversion thyristors and the combination of the bridge rectifier consisting of rectification thyristors, the utility mode can keep the power factor of the rectifier at a higher level without changing the magnitude of direct-current output voltage, thereby effectively reducing the risks of decreasing the power factor caused by the change of the operating power of a intermediate-frequency power supply and polluting an electric network.
Description
Technical field
The utility model relates to a kind of intermediate frequency power supply circuit.
Background technology
Intermediate frequency power supply is a kind of the 50Hz alternating voltage, becomes direct voltage through over commutation, filtering transformation, passes through inverter circuit again the device of the voltage of intermediate frequency of dc voltage conversion one-tenth needs, and the frequency of this voltage of intermediate frequency is generally in the scope of 70-70000Hz.
At present, what most intermediate frequency power supplies adopted is the parallel inverter technology, promptly needs to change the high and low of direct voltage by the angle of flow of adjusting the rectification thyristor, thereby changes watt level.Therefore, existing intermediate frequency power supply is when low power run, and its power factor is very low, in the time of minimum even only reach 0.2; And only operate under the situation of bigger power, along with the angle of flow of rectification thyristor is adjusted into 0 when spending, the power factor of intermediate frequency power supply just can reach peak.
Because unit intermediate frequency power supply power is increasing, so cross when low, will produce severe contamination to electrical network when its power factor, therefore, and national regulation, average power factor is lower than 0.9 when use equipment, will be subjected to the corresponding punishment of power supply administration.This shows that the intermediate frequency power supply that nowadays presses for prior art improves, to satisfy social user demand.
The utility model content
In order to solve the problem that above-mentioned prior art exists, the utility model aims to provide a kind of novel intermediate frequency power supply circuit, under the situation that is implemented in required power factor compensation device not, effectively improves the purpose of circuit power factor.
A kind of intermediate frequency power supply circuit described in the utility model, comprise bridge rectifier, filter unit, inversion unit, afterflow unit and resonance capacitance group in parallel successively, also comprise a resonant inductance, wherein, described inversion unit comprises the inverter thyristor of two series connection; Described resonant capacitance group comprises the resonant capacitance of two series connection; One end of described resonant inductance is connected between described two inverter thyristors, and the other end is connected between described two resonant capacitances.
In above-mentioned intermediate frequency power supply circuit, described bridge rectifier comprises several interconnective rectification thyristors.
In above-mentioned intermediate frequency power supply circuit, described filter unit comprises the filter inductance and the filter capacitor of series connection, and described filter inductance is connected between described bridge rectifier and the inversion unit, and described filter capacitor is connected in parallel on described inversion unit two ends.
In above-mentioned intermediate frequency power supply circuit, described afterflow unit comprises the fly-wheel diode of two parallel connections.
Owing to adopted above-mentioned technical solution, the utility model has adopted the mode of series resonant inverter thyristor, and, make rectifier need not change the size of VD in conjunction with the bridge rectifier of forming by the rectification thyristor, its power factor can be remained on a higher level; Thereby effectively reduce because the intermediate frequency power supply operate power changes and may cause its power factor to descend, and pollute the risk of electrical network.
Description of drawings
Fig. 1 is the circuit theory diagrams of the preferred embodiment of a kind of intermediate frequency power supply circuit of the utility model.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the utility model is described.
As shown in Figure 1, the intermediate frequency power supply circuit in the present embodiment comprises bridge rectifier 1, filter unit 2, inversion unit 3, afterflow unit 4 and resonance capacitance group 5 in parallel successively, also comprises a resonant inductance 6, wherein,
Afterflow unit 4 comprises two fly-wheel diodes 40 that are connected in parallel on two inverter thyristor 30 two ends respectively;
One end of resonant inductance 6 is connected between two inverter thyristors 30, and the other end is connected between two resonant capacitances 50.Thereby effectively reduce harmonic content.
By the foregoing circuit structure as can be known, the power factor of bridge rectifier 1 can be used expression formula COS (α+γ/2) expression, and wherein, α is the delay trigger angle of rectification thyristor 10, and γ is the change of current angle of rectification thyristor 10; If ignore the change of current angle of rectification thyristor 10, then the power factor of bridge rectifier 1 is COS α.
In the utility model,,, be the situation that standard-sized sheet is put so bridge rectifier 1 is in because use high-frequency (2300 hertz) trigger impulse triggers all rectification thyristors 10 simultaneously although bridge rectifier 1 adopts is rectification thyristor 10; Simultaneously, because the delay trigger angle α of rectification thyristor 10 is always 0, so, if with six pulse rectifiers of the three-phase bridge in the present embodiment is example, its power factor then can reach 0.955 always, and is example with six phase bridge-type twelve-pulse rectifiers, and its power factor then can reach 0.988; Therefore, in the utility model, 1 of bridge rectifier is slowly set up VD Ud1 and turn-offed rectifier during in fault when opening work gets final product, and does not regulate its power factor and do not need to change VD.
Below embodiment has been described in detail the utility model in conjunction with the accompanying drawings, and those skilled in the art can make the many variations example to the utility model according to the above description.Thereby some details among the embodiment should not constitute qualification of the present utility model, and the scope that the utility model will define with appended claims is as protection range of the present utility model.
Claims (4)
1. intermediate frequency power supply circuit, it is characterized in that described circuit comprises bridge rectifier, filter unit, inversion unit, afterflow unit and resonance capacitance group in parallel successively, also comprises a resonant inductance, wherein, described inversion unit comprises the inverter thyristor of two series connection; Described resonant capacitance group comprises the resonant capacitance of two series connection; One end of described resonant inductance is connected between described two inverter thyristors, and the other end is connected between described two resonant capacitances.
2. intermediate frequency power supply circuit according to claim 1 is characterized in that, described bridge rectifier comprises several interconnective rectification thyristors.
3. intermediate frequency power supply circuit according to claim 1 and 2, it is characterized in that, described filter unit comprises the filter inductance and the filter capacitor of series connection, and described filter inductance is connected between described bridge rectifier and the inversion unit, and described filter capacitor is connected in parallel on described inversion unit two ends.
4. intermediate frequency power supply circuit according to claim 1 and 2 is characterized in that, described afterflow unit comprises the fly-wheel diode of two parallel connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201888953U CN201616768U (en) | 2010-05-13 | 2010-05-13 | Intermediate-frequency power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201888953U CN201616768U (en) | 2010-05-13 | 2010-05-13 | Intermediate-frequency power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201616768U true CN201616768U (en) | 2010-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201888953U Expired - Lifetime CN201616768U (en) | 2010-05-13 | 2010-05-13 | Intermediate-frequency power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201616768U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014244A (en) * | 2012-12-28 | 2013-04-03 | 无锡应达工业有限公司 | Induction melting vacuum degassing device |
| CN103060734A (en) * | 2012-12-28 | 2013-04-24 | 无锡应达工业有限公司 | Coreless zinc pot for galvanization production line |
-
2010
- 2010-05-13 CN CN2010201888953U patent/CN201616768U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103014244A (en) * | 2012-12-28 | 2013-04-03 | 无锡应达工业有限公司 | Induction melting vacuum degassing device |
| CN103060734A (en) * | 2012-12-28 | 2013-04-24 | 无锡应达工业有限公司 | Coreless zinc pot for galvanization production line |
| CN103014244B (en) * | 2012-12-28 | 2014-11-19 | 无锡应达工业有限公司 | Induction melting vacuum degassing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Mike Nain Inventor after: Zhang Jian Inventor after: Su Zhongde Inventor before: Chen Ying Inventor before: Su Zhongde Inventor after: Mike Nain Inventor after: Zhang Jian Inventor after: Su Zhongde Inventor before: Chen Ying Inventor before: Su Zhongde |
|
| COR | Change of bibliographic data | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101027 |