CN100435247C - Power apparatus and transformer thereof - Google Patents
Power apparatus and transformer thereof Download PDFInfo
- Publication number
- CN100435247C CN100435247C CNB2006101417807A CN200610141780A CN100435247C CN 100435247 C CN100435247 C CN 100435247C CN B2006101417807 A CNB2006101417807 A CN B2006101417807A CN 200610141780 A CN200610141780 A CN 200610141780A CN 100435247 C CN100435247 C CN 100435247C
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- former limit
- winding
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- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 140
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 abstract 1
- 239000004973 liquid crystal related substance Substances 0.000 description 15
- 239000003990 capacitor Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
- H05B41/2822—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
Abstract
The invention discloses a power supply and transformer that has two output paths. The power supply device includes power factor adjusting circuit, multi-switch exchange circuit and transformer. The transformer includes primary coil and at least two secondary coils. The input of primary coil connects to AC, and at least one secondary coil is coupling to primary coil, and the output connects to load or rectification circuit. At least one secondary coil couples with primary coil, and the output connects to oscillation capacity and load. The switch transfer circuit could be one from Push-Pull circuit, half bridge circuit and full bridge circuit. It could realize two paths independent output and decrease power supply cost and lower power consumption.
Description
Technical field
The present invention relates to appliance field, the supply unit of a kind of two-way output that is specifically related to use in the electrical equipment.
Background technology
Liquid crystal indicator comprises backlight module and liquid crystal panel, and backlight module is used to described non-luminous liquid crystal panel own that light source is provided.No matter backlight module or liquid crystal panel, all needing power supply is its power supply.
Consult Fig. 1, application scenario at some liquid crystal indicator, in the application as the two-in-one power supply of LCD TV, except for providing in the backlight module the lamp tube drive power of high-voltage alternating to tube load, the low-voltage DC that also needs an isolation is provided is to the control in the liquid crystal panel and image processing circuit and power amplifier power supply, and this low-voltage dc power supply is called the control power supply.
Control power supply output 18～24V direct current is exported 12V to power amplifier among the figure, 5V, and the 5VSTB direct current is to control and image processing circuit.
After the AC rectification input, also must between rectification circuit and lamp tube drive circuit, add a circuit of power factor correction usually, so liquid crystal television power supply generally have three more powerful power circuits at least in addition.In these three power circuits, lamp tube drive circuit and circuit of power factor correction are single because of controlling object, the circuit standard of comparison; And the control power supply because the difference of subscriber line circuit, sequential difference, output voltage each is different and standard is the poorest, thereby be unfavorable for the unified and large-scale production of standard of liquid crystal indicator power supply.Described in addition three large power supply costs are also higher, and conversion efficiency is also poor.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of supply unit cheaply.
The objective of the invention is to be achieved through the following technical solutions: a kind of supply unit is provided, comprises transformer and many switch transformed circuits; Described transformer comprises former limit winding and at least two secondary windings, described at least one secondary winding and former limit winding close-coupled; Described another secondary winding at least and former limit winding loose couplings; The output of the loosely-coupled secondary winding of described and former limit winding is serially connected with electric capacity, or not only and connect but also be serially connected with electric capacity; The leakage inductance of the loosely-coupled secondary winding of described and former limit winding and described electric capacity constitute oscillating circuit, drive load together; Described many switch transformed circuits are that described many switch transformed circuits are connected with the input of described former limit winding by push-pull circuit topology, half-bridge circuit topology or the full-bridge circuit topological circuit of the output of change FREQUENCY CONTROL, provide to exchange input.
Preferably, the secondary winding quantity of described formation oscillating circuit is two, by connecing tube load and electric capacity after the voltage stack series connection, the output-parallel of two secondary windings of described formation oscillating circuit connects dividing potential drop and detects electric capacity, and described dividing potential drop detects the neutral earthing of electric capacity.
Preferably, described at least one and the closely-coupled secondary winding of former limit winding quantity are two, are connected in series with the voltage stacked system.
Preferably, described number transformer is the former limit parallel connection of two, two transformers, the closely-coupled secondary winding voltage overlapped in series of two transformers, the loosely-coupled secondary winding voltage overlapped in series of two transformers.
Preferably, further comprise circuit of power factor correction, its output high voltage direct current is to described many switch transformed circuits.
Preferably, the output of the closely-coupled secondary winding of described and former limit winding directly drives load or through rectification circuit rear drive load.
Preferably, any one magnitude of voltage among output voltage 18～24V direct voltage of the closely-coupled secondary winding of described and former limit winding, output any one magnitude of voltage among the voltage behind the rectification circuit is 18～24V direct voltage of the closely-coupled secondary winding of perhaps described and former limit winding.
Preferably, described secondary winding and former limit winding close-coupled are meant that secondary winding and former limit winding coexist in the concentric plan, and described secondary winding and former limit winding loose couplings are meant that secondary winding and former limit winding be not in a concentric plan.And the creepage distance between loosely-coupled secondary winding of former limit winding and the former limit winding more preferably is at least 6 millimeters.
As can be seen from the above technical solutions, because the transformer in the supply unit of the present invention comprises two-way output, can be used for driving fluorescent tube with the former limit of the transformer loosely-coupled secondary winding of winding, can be used for powering to subscriber line circuit with the former limit of the transformer closely-coupled secondary winding of winding.Compare the existing power supply technology, omitted and be specifically designed to the control power supply that drives subscriber line circuit, cost greatly reduces, and power consumption also effectively reduces.In addition, because with former limit winding close-coupled, the control frequency of low-voltage dc voltage and many switch transformed circuits that drives its rectification of transformer secondary winding output of other circuit has nothing to do, its stability depends on the stable of circuit of power factor correction output, but normal power supply is given power amplifier, to user's DC/DC circuit supply, provide the needed various voltages and the sequential of control and image processing circuit simultaneously.
After this supply unit and liquid crystal display screen formed a whole, the output of power supply can be normalized to a kind of voltage, was easy to the formation standard, was user-friendly to, thereby laid the foundation for producing in enormous quantities.And a converter can also provide the control power supply in the control fluorescent tube, and obviously cost is extremely low.
And, because supply unit of the present invention only needs a transformer, obtain two-way output and drive different loads respectively, compare the existing power supply technology, omitted a more powerful converter, cost greatly reduces; When many switch transformed circuits adopted the half-bridge circuit topology, owing to realized zero voltage switch, power consumption effectively reduced.Have nothing to do with the direct voltage of its rectification output of the closely-coupled transformer secondary of former limit winding winding and the control frequency of many switch transformed circuits in addition, its stability depends on the stable of circuit of power factor correction output, can satisfy general requirement.Then directly be controlled by the control frequency of many switch transformed circuits with the output of the loosely-coupled transformer secondary of former limit winding winding, i.e. transformer two-way output is independent control respectively.Like this, export the supply unit of mutual decoupling zero with regard to the two-way of having realized a kind of low-cost high-efficiency.
Description of drawings
Fig. 1 is the circuit theory diagrams of prior art liquid crystal television power supply device;
Fig. 2 is the circuit theory diagrams of supply unit of the present invention;
Fig. 3 is the circuit diagram of supply unit first execution mode of the present invention;
Fig. 4 is the generalized section of transformer first execution mode among the present invention;
Fig. 5 is the generalized section of transformer second execution mode among the present invention;
Fig. 6 is the circuit diagram of supply unit second execution mode of the present invention;
Fig. 7 is the generalized section of transformer the 3rd execution mode among the present invention;
Fig. 8 is the generalized section of transformer the 4th execution mode among the present invention;
Fig. 9 is the circuit diagram of supply unit the 3rd execution mode of the present invention;
Figure 10 is the circuit diagram of supply unit the 4th execution mode of the present invention;
Figure 11 is the circuit diagram of supply unit the 5th execution mode of the present invention;
Figure 12 is the circuit diagram of many switch transformed circuit first execution modes in the supply unit of the present invention;
Figure 13 is the circuit diagram of many switch transformed circuit second execution modes in the supply unit of the present invention;
Figure 14 is the circuit diagram of many switch transformed circuit the 3rd execution modes in the supply unit of the present invention.
Embodiment
Consult Fig. 2, basic principle of the present invention is: after adopting two-way to export the switching power converters of mutual decoupling zero in lamp tube drive power, the transformer in the lamp tube drive power is provided with two-way output.One removes to drive fluorescent tube with the loosely-coupled transformer secondary of former limit winding winding, can control electric current in the fluorescent tube by changing switching frequency; Its two, then irrelevant with switching frequency with the low-voltage dc voltage of former limit closely-coupled transformer secondary winding rectification output, stability depends on the stable of circuit of power factor correction PFC output voltage.As long as a very low power standby power is set like this, just can omit the more powerful control power supply in the two-in-one power supply of prior art LCD TV shown in Figure 1.
Consult Fig. 3, a basic embodiment of supply unit of the present invention comprises a transformer T
r, described transformer T
rComprise a former limit winding N
1With two secondary winding N
2, N
3Described former limit winding N
1Input connect interchange, secondary winding N
2With former limit winding N
1Close-coupled, another secondary winding N
3With former limit winding loose couplings, output is serially connected with capacitor C
3, the leakage inductance of described secondary winding and described capacitor C
3Constitute oscillating circuit, drive load tube load R together
LCapacitor C
1With N
3And connect, be that dividing potential drop detects electric capacity.
Top supply unit only needs a transformer, obtains two-way output and drives fluorescent tube and other circuit respectively, and power supply omits and is specifically designed to the control power supply that drives other circuit compared to existing technology, and cost greatly reduces, and power consumption effectively reduces.In addition, because with former limit winding N
1Close-coupled drives the low-voltage dc voltage and the former limit winding N of its rectification of transformer secondary winding output of other circuit
1The a-c cycle of input is irrelevant, but normal power supply is given power amplifier, satisfies user's demand.In addition, the present invention can be provided with a plurality of transformers according to actual needs, and combination in any constitutes the multichannel output that quantity is Duoed than transformer, also can reduce cost.
Below in conjunction with execution mode and accompanying drawing, describe the present invention.
Consult Fig. 3 again, supply unit first execution mode of the present invention comprises the rectification circuit, the circuit of power factor correction that connects the output of rectification circuit direct current that get access to grid, the transformer T that connects many switch transformed circuits of circuit of power factor correction high voltage direct current output and connect many switch transformed circuits interchange outputs
1
Described transformer T
1Comprise a former limit winding N
1With two secondary winding N
2, N
3.Described former limit winding N
1Input connect many switch transformed circuits and exchange output, secondary winding N
2With former limit winding N
1Close-coupled, its output connects full bridge rectifier.The described secondary winding N that connects
2Full bridge rectifier output connect the inductance L of polyphone
fAnd capacitor C
fLoad R
2With described capacitor C
fParallel connection, the pressure drop in the load are V
2Another secondary winding N
3Meet tube load R
LThe capacitor C that is connected in series with fluorescent tube
3Or and N
3And the capacitor C that connects
1Constitute oscillating circuit with inductance L, offer the alternating current that fluorescent tube needs.Described many switch transformed circuits are the semi-bridge alternation circuit.
In the present embodiment, secondary winding N
3With former limit winding loose couplings, N
1And N
3Leakage inductance form described inductance L, with described capacitor C
1And C
3Constitute oscillating circuit, drive described fluorescent tube.In other embodiments, inductance L can be independent of secondary winding N
3Promptly as shown in Figure 3, inductance L is and transformer T
1The independent inductance that separates, and secondary winding N
3With former limit winding close-coupled.
Consult Fig. 4, the secondary winding of described transformer and former limit winding close-coupled are meant secondary winding N
2Be positioned at former limit winding N
1And between the core post (not indicating), in the concentric plan that coexists, form the concentric circles stepped construction.Secondary winding N
3Then be wrapped in the core post other end, and with described former limit winding N
1/ secondary winding N
2Separate, not in a concentric plan, form at least creepage distance greater than 6mm.
Consult Fig. 5, in another embodiment, the secondary winding of described transformer and former limit winding close-coupled are meant secondary winding N
2Be positioned at two-layer former limit winding N
1Between, form the concentric circles sandwich structure.
From as can be seen above, supply unit of the present invention only needs a transformer just can obtain two-way output, drives the subscriber line circuit of fluorescent tube and LCD TV respectively, compared to existing technology, has omitted and has been specifically designed to the high-power control power supply that drives subscriber line circuit.Power to cpu circuit as long as replenish a very low power standby power, can realize application or other similar application of the two-in-one power supply of LCD TV, cost greatly reduces, and power consumption effectively reduces.In addition, because with former limit winding N
1Close-coupled, the secondary winding N of transformer
2The low-voltage dc voltage and the former limit winding N of its rectification output
1The a-c cycle of input is irrelevant, and is only related with the output of circuit of power factor correction, but its stability normal power supply is given power amplifier, satisfies user's demand.
Because the semi-bridge alternation circuit that adopts two-way to export mutual decoupling zero still is operated in the zero voltage switch state, so conversion efficiency is still very high, the efficient of whole supply unit also is improved.Transformer secondary winding N
2The low-voltage dc voltage of output is designed in any one magnitude of voltage among 18～24V, can be directly to the power amplifier power supply, and its stability meets the demands.Can increase some simple DC/DC varying circuits get final product on user circuit board as for control and the needed various control voltages of image processing circuit, controlling voltage and sequential thereof so just can be by controlling and image processing circuit directly be controlled.
After adopting supply unit of the present invention, liquid crystal television power supply can directly provide by liquid crystal display screen manufacturer is supporting, have only a 5V standby voltage and start 18～24V voltage that export the back for user's interface, the user can save a large amount of time and efforts on power supply, and the cost of liquid crystal television power supply reduces greatly because of large-scale standardized production.After this transformer formed a whole as supply unit and liquid crystal display screen, the output of power supply can be normalized to a kind of voltage, is easy to the formation standard, was user-friendly to, thereby laid the foundation for producing in enormous quantities.And a converter can also provide the control power supply in the control fluorescent tube, and obviously cost is extremely low.
Except the application on liquid crystal television power supply, the switching power converters that two-way is exported mutual decoupling zero also can be applied in similar occasion.
Consult Fig. 6, supply unit second execution mode of the present invention and first execution mode are similar, and difference is:
One, the transformer secondary winding that connects tube load is divided into two, and becomes two secondary winding N by voltage stack series connection
3And N
31Two capacitor C of fluorescent tube serial connection
3, C
31, be connected on described two secondary winding N at last by voltage stack series connection
3And N
31Output.Described two secondary winding N
3And N
31The dividing potential drop that polyphone was gone back and was connected in output detects capacitor C
01, C
11, C
21And C
02, described dividing potential drop capacitor C
01, C
11And C
21, C
02Neutral earthing.C
01And C
11Between, C
21And C
02Between respectively as a voltage detecting point, output voltage V respectively
3And V
31
Two, described supply unit also comprises control circuit, and its input fetches from described dividing potential drop and detects capacitor C
01C
11And C
21, C
02Voltage detecting value V
3And V
31, the output frequency control signal is to many switch transformed circuits, with the output voltage of control transformer.
Three, described transformer device structure such as Fig. 7 or shown in Figure 8.The former limit of transformer among Fig. 7 winding N
1Surround secondary winding N
2, the same with the structure of Fig. 4 is the close-coupled structure.Meet the secondary winding N of tube load Lamp
3And N
31Former limit, office winding N
1Two ends, and and former limit winding N
1With secondary winding N
2Certain creepage distance is arranged, such as 6mm at least.Transformer device structure among Fig. 8 and the transformer ' s type among Fig. 7 seemingly, difference is secondary winding N
2Be positioned at two-layer former limit winding N
1Between, form the concentric circles sandwich structure.
Above-mentioned execution mode improves the lamp tube drive circuit structure more, and has the advantage that is had with described first execution mode.
Consult Fig. 9, supply unit the 3rd execution mode of the present invention and second execution mode are similar, and difference is:
Be divided into two two secondary winding N with the closely-coupled transformer secondary of former limit winding winding
2And N
21Be connected in series by the voltage stacked system, the neutral earthing of two secondary windings, output connects full-wave rectifying circuit.Present embodiment has the advantage that is had with described second execution mode.
Consult Figure 10, supply unit the 4th execution mode of the present invention and the 3rd execution mode are similar, and difference is:
Described number transformer is the former limit parallel connection of two, two transformers, and the closely-coupled secondary winding of two transformers is pressed the series connection of voltage stacked system, and its output connects full bridge rectifier; The loosely-coupled secondary winding of two transformers is pressed the series connection of voltage stacked system, and its output connects electric capacity rear drive fluorescent tube.Described many switch transformed circuits are the semi-bridge alternation circuit, and described semi-bridge alternation circuit comprises two switch Q
1And Q
2, two outputs of connection control circuit respectively.The input of control circuit then receives respectively from dividing potential drop and detects capacitor C
01, C
11And C
21, C
02Voltage detecting value V
3And V
31Present embodiment has the advantage that is had with described the 3rd execution mode.
Consult Figure 11, supply unit the 5th execution mode of the present invention and the 4th execution mode are similar, and difference is:
The described secondary winding N that connects
2And N
21Rectification circuit be full-wave rectifying circuit, specifically: diode D
1And D
2Two cathode output ends unite two into one, and it always exports the termination inductance L
f, inductance L
fTwo ends meet a diode D respectively
3Negative pole and filter capacitor.Diode D
1And D
2Two positive poles meet secondary winding N respectively
2Hot junction and secondary winding N
2Cold junction.Present embodiment has the advantage that is had with described the 4th execution mode.
More than many switch transformed circuits of all embodiment of the present invention, its structure can be the many switch transformed circuits of push-pull circuit shown in Figure 12 topology formula, half-bridge circuit topology many switch transformed circuits of formula shown in Figure 13 or the many switch transformed circuits of full-bridge circuit topology formula shown in Figure 14, comprises 4 switch Q
1, Q
2, Q
3And Q
4
In other embodiments, fluorescent tube not necessarily is connected in series electric capacity, but is attempted by on the electric capacity, and electric capacity then constitutes oscillating circuit together with transformer leakage inductance.
More than a kind of supply unit provided by the present invention and transformer thereof are 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 (9)
1. a supply unit is characterized in that: comprise transformer and many switch transformed circuits;
Described transformer comprises former limit winding and at least two secondary windings, described at least one secondary winding and former limit winding close-coupled; Described another secondary winding at least and former limit winding loose couplings; The output of the loosely-coupled secondary winding of described and former limit winding is serially connected with electric capacity, or not only and connect but also be serially connected with electric capacity; The leakage inductance of the loosely-coupled secondary winding of described and former limit winding and described electric capacity constitute oscillating circuit, drive load together;
Described many switch transformed circuits are that described many switch transformed circuits are connected with the input of described former limit winding by push-pull circuit topology, half-bridge circuit topology or the full-bridge circuit topological circuit of the output of change FREQUENCY CONTROL, provide to exchange input.
2. supply unit according to claim 1, it is characterized in that: the secondary winding quantity of described formation oscillating circuit is two, by connecing tube load and electric capacity after the voltage stack series connection, the output-parallel of two secondary windings of described formation oscillating circuit connects dividing potential drop and detects electric capacity, and described dividing potential drop detects the neutral earthing of electric capacity.
3. supply unit according to claim 2 is characterized in that: described at least one and the closely-coupled secondary winding of former limit winding quantity are two, are connected in series with the voltage stacked system.
4. supply unit according to claim 1, it is characterized in that: described number transformer is two, the former limit parallel connection of two transformers, the closely-coupled secondary winding voltage overlapped in series of two transformers, the loosely-coupled secondary winding voltage overlapped in series of two transformers.
5. supply unit according to claim 1 is characterized in that: further comprise circuit of power factor correction, its output high voltage direct current is to described many switch transformed circuits.
6. according to each described supply unit of claim 1 to 5, it is characterized in that: the output of the closely-coupled secondary winding of described and former limit winding directly drives load or through rectification circuit rear drive load.
7. supply unit according to claim 6, it is characterized in that: the output voltage of the closely-coupled secondary winding of described and former limit winding is any one magnitude of voltage among 18～24V direct voltage, output any one magnitude of voltage among the voltage behind the rectification circuit is 18～24V direct voltage of the closely-coupled secondary winding of perhaps described and former limit winding.
8. according to each described supply unit of claim 1 to 5, it is characterized in that: described secondary winding and former limit winding close-coupled are meant that secondary winding and former limit winding coexist in the concentric plan, and described secondary winding and former limit winding loose couplings are meant that secondary winding and former limit winding be not in a concentric plan.
9. supply unit according to claim 8 is characterized in that: the creepage distance between loosely-coupled secondary winding of described and former limit winding and the former limit winding is at least 6 millimeters.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101417807A CN100435247C (en) | 2006-09-30 | 2006-09-30 | Power apparatus and transformer thereof |
| PCT/CN2007/070783 WO2008037221A1 (en) | 2006-09-30 | 2007-09-26 | Power supply and its transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101417807A CN100435247C (en) | 2006-09-30 | 2006-09-30 | Power apparatus and transformer thereof |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101307844A Division CN101404201B (en) | 2006-09-30 | 2006-09-30 | Power supply device and its transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1949418A CN1949418A (en) | 2007-04-18 |
| CN100435247C true CN100435247C (en) | 2008-11-19 |
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ID=38018894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101417807A Expired - Fee Related CN100435247C (en) | 2006-09-30 | 2006-09-30 | Power apparatus and transformer thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100435247C (en) |
| WO (1) | WO2008037221A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872674A (en) * | 2009-04-27 | 2010-10-27 | 台达电子工业股份有限公司 | Current-sharing transformer and applicable power supply circuit thereof |
| CN103259992B (en) * | 2013-04-01 | 2016-02-10 | 青岛海信电器股份有限公司 | Standby power circuit and idle method |
| CN104393601B (en) * | 2014-12-19 | 2017-02-22 | 湖南大学 | Inductance integrated hybrid railway power flow controller |
| CN105024444A (en) * | 2015-07-10 | 2015-11-04 | 张晓军 | Metro weak current integrated UPS bypass control system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1763874A (en) * | 2004-10-19 | 2006-04-26 | 耀胜电子股份有限公司 | Transformer of converter |
| JP2006179419A (en) * | 2004-12-24 | 2006-07-06 | Minebea Co Ltd | Multi-lamp type discharge lamp lighting device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4466051A (en) * | 1982-10-25 | 1984-08-14 | Rca Corporation | Regulated power supply incorporating a power transformer having a tightly coupled supplemental power transfer winding |
| JP2001103751A (en) * | 1999-09-30 | 2001-04-13 | Sony Corp | Switching power circuit and isolation converter transformer |
| JP2001197744A (en) * | 2000-01-13 | 2001-07-19 | Sony Corp | Switching power supply circuit |
| US6215680B1 (en) * | 2000-05-24 | 2001-04-10 | Garmin Corporation | Circuit for obtaining a wide dimming ratio from a royer inverter |
| JP2002272106A (en) * | 2001-03-13 | 2002-09-20 | Sony Corp | Switching power supply circuit |
-
2006
- 2006-09-30 CN CNB2006101417807A patent/CN100435247C/en not_active Expired - Fee Related
-
2007
- 2007-09-26 WO PCT/CN2007/070783 patent/WO2008037221A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1763874A (en) * | 2004-10-19 | 2006-04-26 | 耀胜电子股份有限公司 | Transformer of converter |
| JP2006179419A (en) * | 2004-12-24 | 2006-07-06 | Minebea Co Ltd | Multi-lamp type discharge lamp lighting device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008037221A1 (en) | 2008-04-03 |
| CN1949418A (en) | 2007-04-18 |
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