CN102244474A - AC (Alternating Current)/DC (Direct Current)/DC power supply with low cross regulation ratio for multiplexed output - Google Patents
AC (Alternating Current)/DC (Direct Current)/DC power supply with low cross regulation ratio for multiplexed output Download PDFInfo
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- CN102244474A CN102244474A CN2010101662805A CN201010166280A CN102244474A CN 102244474 A CN102244474 A CN 102244474A CN 2010101662805 A CN2010101662805 A CN 2010101662805A CN 201010166280 A CN201010166280 A CN 201010166280A CN 102244474 A CN102244474 A CN 102244474A
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Abstract
The invention provides an AC (Alternating Current)/DC (Direct Current)/DC power supply with low cross regulation ratio for multiplexed output. The power supply comprises a flyback 24V stabilized voltage power supply, a PWM (Pulse Width Modulation) controlled IC (Integrated Circuit) and driver and a plurality of high-frequency push-pull transformers, wherein the output end of the flyback 24V stabilized voltage power supply is connected with the primary power supply pins of the high-frequency push-pull transformers and the power supply end of the PWM controlled IC in parallel; and the PWM controlled IC operates at a fixed duty factor. Driving signals of the PWM controlled IC are accessed to the same primary switching tube to drive the plurality of high-frequency push-pull transformers so as to be convenient to supply power to each module of equipment independently and easily realize data transmission among the modules in an isolation manner. When one group of voltage is loaded, the driving duty factor and the inputted voltage can not change, the voltages of other light-load circuits can not be affected, and thus multiplexed circuit output can be realized flexibly.
Description
Technical field
The invention belongs to the electric equipment technical field, design a kind of power supply, be specifically related to the AC/DC/DC power supply that a kind of multichannel is isolated output, low intersection regulation.
Background technology
Transformer of usefulness of the prior art is realized multichannel output type structure, generally be applied in the less demanding and few place of voltage group number of intersection regulation, under normal conditions, wherein one the tunnel has load and then can impact other one or more output circuit, during the many group outputs of flyback power supply realization promptly commonly used one group of loading therein, voltage is unsteady during another group underloading can be very big, thereby influence other one group operating potential.Have the structure of multichannel output for transformer, be difficult in the prior art realize that wherein one tunnel output band carries and can satisfy and isolate the requirement that multichannel output is immune.
Summary of the invention
The purpose of this invention is to provide a kind of independent power supply that an equipment is made up of a plurality of modules, with each output circuit by separately module independent process data, be converted to then digital signal with the mode of isolating the transmission data to solve the problem that influences each other that reduces between each module.
The technical solution adopted in the present invention is, a kind of AC/DC/DC power supply that is used for multichannel output, low intersection regulation, it is by an anti-sharp 24V stabilized voltage power supply, PWM control IC and driving, and the device of a plurality of high frequency push-pull transformers compositions, the described anti-output-parallel that swashs the 24V stabilized voltage power supply inserts the primary source pin of a plurality of high frequency push-pull transformers and the power end of PWM control IC.
Multichannel output, the low AC/DC/DC power supply that intersects regulation of being used for of the present invention, its feature also be,
Described PWM control IC and driving are with fixed duty cycle work, the drive signal of PWM control IC and driving is inserted the primary switch pipe of a plurality of high frequency push-pull transformers, and described a plurality of high frequency push-pull transformers are independently-powered by each module that its fixing turn ratio and duty ratio are exported to equipment separately.
The present invention adopts by an anti-sharp 24V stabilized voltage power supply, PWM control IC and driving, and the AC/DC/DC power supply that is used for multichannel output, low intersection regulation of a plurality of high frequency push-pull transformers compositions, its output that instead swashs the 24V stabilized voltage power supply inserts the primary source pin of a plurality of high frequency push-pull transformers and the power end of PWM control IC.
Swash under the stable voltage conditions of power supply output the anti-of front end, PWM control IC and driving by the two-way fixed duty cycle remove to drive simultaneously a plurality of high frequency push-pull transformers, when wherein one group of voltage is in loading, driving duty ratio and input voltage can not change, so the voltage to other underloading or heavy-loaded circuit can not have any impact, can realize many group outputs very flexibly, be particluarly suitable for using in high end instrument or the equipment.
Description of drawings
Fig. 1 is the AC/DC/DC power circuit diagram of multichannel output of the present invention, low intersection regulation;
Fig. 2 is high frequency push-pull transformer positive voltage spacing output circuit figure of the present invention;
Fig. 3 is high frequency push-pull transformer generating positive and negative voltage spacing output circuit figure of the present invention.
Among the figure, 1. anti-sharp 24V stabilized voltage power supply, 2.PWM control IC and driving, 3. high frequency push-pull transformer;
B, C, D, E, F are: the high frequency push-pull transformer, G is: PWM control IC and driving.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
A kind of AC/DC/DC power supply that is used for multichannel output, low intersection regulation, as shown in Figure 1, it is by an anti-sharp 24V stabilized voltage power supply 1, PWM control IC and drive 2, and the device of a plurality of high frequency push-pull transformers 3 compositions, the described anti-output-parallel that swashs 24V stabilized voltage power supply 1 inserts the primary source pin of a plurality of high frequency push-pull transformers 3 and the power end of PWM control IC 2; Described PWM control IC 2 is with fixed duty cycle work, the PWM control IC is inserted a plurality of high frequencies with the drive signal that drives 2 push away the primary switch pipe of exempting from transformer 3, described a plurality of high frequency push-pull transformers 3 are independently-powered by each module that its fixing turn ratio and duty ratio are exported to equipment separately.
During startup work of the present invention, swash under the stable voltage conditions of 24V stabilized voltage power supply 1 output the anti-of front end, shown in Fig. 1,2 and 3, G PWM control IC and driving 2 by the two-way fixed duty cycle remove to drive simultaneously a plurality of high frequency push-pull transformers 3, it is the primary switch pipe of B, C, D, E, F high frequency push-pull transformer 3, B, C, D, E, F high frequency transformer by the fixing turn ratio and duty ratio output, are given the circuit supply that it connected separately at this moment.
With Fig. 1 is example, A is an anti-sharp 24V stabilized voltage power supply 1, city's power supply of input is exported stable 24VDC voltage by anti-sharp 24V stabilized voltage power supply 1, be G PWM control IC 2 and B, C, D, E, 3 power supplies of F high frequency push-pull transformer, G PWM control IC 2 drives B simultaneously with fixed duty cycle then, C, D, E, five high frequency push-pull transformers of F, under the condition that anti-sharp 24V stabilized voltage power supply 1 is set up, become to organize independently+15VDC voltage with the voltage transitions of fixing duty ratio, at this moment B with 24VDC more, C, D, E, F high frequency push-pull transformer 3 is with fixed duty cycle and securing loop specific output.When any one group of voltage wherein when loading, drive duty ratio and input 24VDC voltage does not have any change, therefore to other respectively organize the underloading circuit+15VDC voltage can not cause unsteady, so can not have any impact to each group circuit voltage.
Claims (2)
1. one kind is used for the AC/DC/DC power supply that multichannel is exported, hanged down the intersection regulation, it is characterized in that, it is by an anti-sharp 24V stabilized voltage power supply (1), PWM control IC and driving (2), and the device of a plurality of high frequency push-pull transformers (3) composition, the described anti-output-parallel that swashs 24V stabilized voltage power supply (1) inserts the primary source pin of a plurality of high frequency push-pull transformers (3) and the power end of PWM control IC (2).
2. the AC/DC/DC power supply that is used for multichannel output, low intersection regulation according to claim 1, it is characterized in that, described PWM control IC and driving (2) are with fixed duty cycle work, the drive signal of PWM control IC and driving (2) is inserted the primary switch pipe of a plurality of high frequency push-pull transformers (3), and described a plurality of high frequency push-pull transformers (3) are independently-powered by each module that its fixing turn ratio and duty ratio are exported to equipment separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010166280.5A CN102244474B (en) | 2010-05-10 | 2010-05-10 | AC (Alternating Current)/DC (Direct Current)/DC power supply with low cross regulation ratio for multiplexed output |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010166280.5A CN102244474B (en) | 2010-05-10 | 2010-05-10 | AC (Alternating Current)/DC (Direct Current)/DC power supply with low cross regulation ratio for multiplexed output |
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| Publication Number | Publication Date |
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| CN102244474A true CN102244474A (en) | 2011-11-16 |
| CN102244474B CN102244474B (en) | 2014-01-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324231A (en) * | 2018-12-03 | 2019-02-12 | 苏州共元自控技术有限公司 | A kind of batteries of electric automobile group direct current insulation against ground resistor detecting device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002119058A (en) * | 2000-10-05 | 2002-04-19 | Densei Lambda Kk | Multiple-output, synchronous-rectification, switching power supply |
| CN201118450Y (en) * | 2007-11-16 | 2008-09-17 | 吴壬华 | An implementation circuit for phase crossed parallel operation with active clamp circuit |
| CN201758364U (en) * | 2010-05-10 | 2011-03-09 | 东莞市创锐电子技术有限公司 | AC/multi-path DC power supply for multi-path output in low cross adjustment rate |
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2010
- 2010-05-10 CN CN201010166280.5A patent/CN102244474B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002119058A (en) * | 2000-10-05 | 2002-04-19 | Densei Lambda Kk | Multiple-output, synchronous-rectification, switching power supply |
| CN201118450Y (en) * | 2007-11-16 | 2008-09-17 | 吴壬华 | An implementation circuit for phase crossed parallel operation with active clamp circuit |
| CN201758364U (en) * | 2010-05-10 | 2011-03-09 | 东莞市创锐电子技术有限公司 | AC/multi-path DC power supply for multi-path output in low cross adjustment rate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324231A (en) * | 2018-12-03 | 2019-02-12 | 苏州共元自控技术有限公司 | A kind of batteries of electric automobile group direct current insulation against ground resistor detecting device and method |
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| CN102244474B (en) | 2014-01-15 |
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Address after: Room 568, West Zone, national e-commerce demonstration base, No. 528, tianguba Road, software new town, Yuhua Street office, hi tech Zone, Xi'an City, Shaanxi Province Patentee after: Chuang Rui equipment intelligent manufacturing (Xi'an) Co.,Ltd. Address before: 523000 Dongguan, Guangdong, Nancheng District, 5 Zhou Xi Road, Goldman Sachs technology two phase eleventh Goldman science and technology building eleventh room 06 Patentee before: GUANGDONG TOPFER ELECTRONIC TECHNOLOGY CO.,LTD. |
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