CN102005946A - Design method of high-current output photoelectric isolation AC/DC conversion power supply - Google Patents
Design method of high-current output photoelectric isolation AC/DC conversion power supply Download PDFInfo
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- CN102005946A CN102005946A CN 201010582638 CN201010582638A CN102005946A CN 102005946 A CN102005946 A CN 102005946A CN 201010582638 CN201010582638 CN 201010582638 CN 201010582638 A CN201010582638 A CN 201010582638A CN 102005946 A CN102005946 A CN 102005946A
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Abstract
The invention relates to a direct-current power supply, in particular to a design method of a high-current output photoelectric isolation alternating current/direct current (AC/DC) conversion power supply which converts 220V alternating current into direct current without a transformer. The design method is characterized in that: a rectifying circuit and a DC/DC conversion circuit are arranged in a shell; a load circuit of the rectifying circuit is connected in series with a current-limiting resistor R0 and a light-emitting diode (LED) string; a silicon photoelectric cell unit is arranged in the light-emitting direction of the LED string; the voltage output end of the silicon photoelectric cell unit is electrically connected with the input end of the DC/DC conversion circuit; and the output end of the DC/DC conversion circuit is electrically connected with the DC/DC voltage output end of the shell. The invention provides the design method of the high-current output photoelectric isolation AC/DC conversion power supply which converts the 220V alternating current into the direct current without the transformer.
Description
Technical field
The present invention relates to a kind of DC power supply, particularly a kind of method for designing that the 220V alternating current is converted to galvanic big electric current output photoelectricity isolation ac-dc switching power without transformer.
Background technology
In electronic equipment, the required power supply of electronic device is many to be to convert to galvanicly by the 220V alternating current, and this transfer process has by transformer finishes the conversion of high pressure to low pressure, converts into low-voltage alternating-current to stream again.The switching power circuit of employing pattern is also arranged, and is that its volume of which kind of form all is must be bigger.It all needs transformer, and the transformer of Switching Power Supply is smaller.
Summary of the invention
The purpose of this invention is to provide a kind of transformer that do not need and convert the 220V alternating current to method for designing that galvanic big electric current output photoelectricity is isolated ac-dc switching power.
The object of the present invention is achieved like this, a kind of big electric current output photoelectricity is isolated the method for designing of ac-dc switching power, it is characterized in that: rectification circuit and DC/DC change-over circuit are arranged in housing, the load circuit of rectification circuit is serially connected with current-limiting resistance R0 and light emitting diode string, the silicon photocell group is arranged on the light emission direction of light emitting diode string, the voltage output end of silicon photocell group is electrically connected with the input of DC/DC change-over circuit, and the output of DC/DC change-over circuit is electrically connected with the DC/DC voltage output end of housing; The silicon photocell component becomes many groups, organizes the silicon photocell component layers more and distributes, and light emitting diode string is arranged between the layering.
The light emitting diode string number of the load circuit serial connection of described rectification circuit is according to the output current and the voltage parameter decision of DC/DC change-over circuit.
The rectifier diode of described rectification circuit is a light-emitting diode.
Described rectification circuit is bridge rectifier or semibridge system rectification circuit.
Describedly be divided into many group silicon photocell groups and be electrically connected with the input of a plurality of DC/DC change-over circuits respectively, the output of a plurality of DC/DC change-over circuits is electrically connected with a plurality of DC/DC voltage output ends of housing, and a plurality of DC/DC voltage output ends are not altogether or not altogether.
Advantage of the present invention is: owing to constitute the AC/DC change-over circuit by photoelectricity coupling circuit, a DC/DC change-over circuit, the diode of the rectification circuit of the input of photoelectricity coupling circuit is a light-emitting diode, the output circuit of photoelectricity coupling circuit is a silicon photocell, that is to say by the 220V alternating current is changeed the driven for emitting lights diode, by silicon photocell transform light energy is become electric energy, by the DC/DC change-over circuit voltage of silicon photocell is being changed into the direct current of needs at last.Direct current is to isolate fully with the 220V alternating current, therefore has the advantage that body is slight, reliability is high, anti-interference is good.
Description of drawings
The invention will be further described below in conjunction with the embodiment accompanying drawing:
Fig. 1 is the embodiment of the invention 1 structural representation;
Fig. 2 is the embodiment of the invention 2 structural representations;
Fig. 3 is the embodiment of the invention 3 structural representations;
Fig. 4 is silicon photocell group and the light emitting diode string distribution map that multilayer distributes.
Among the figure, 1, bridge rectifier; 2, DC/DC change-over circuit; 3, rectification circuit; 4, silicon photocell group; 5, housing; 6, light emitting diode string; 7, DC/DC voltage output end; 8, load circuit.
Embodiment
As shown in Figure 1, a kind of big electric current output photoelectricity is isolated the method for designing of ac-dc switching power, rectification circuit 3 and DC/DC change-over circuit 2 are arranged in housing 5, the rectifier diode of rectification circuit 3 is light-emitting diodes, the load circuit 8 of rectification circuit 3 is serially connected with current-limiting resistance R0 and light emitting diode string 6, silicon photocell group 4 is arranged on the light emission direction of light emitting diode string 6, the voltage output end of silicon photocell group 4 is electrically connected with the input of DC/DC change-over circuit 2, and the output of DC/DC change-over circuit 2 is electrically connected with the DC/DC voltage output end 7 of housing 5.Rectification circuit 3 is bridge rectifiers 1, and light emitting diode string 6 numbers of load circuit 8 serial connections of bridge rectifier 1 are according to the output current and the voltage parameter decision of DC/DC change-over circuit 2; The silicon photocell component becomes many groups, organizes the silicon photocell component layers more and distributes, and light emitting diode string is arranged between the layering, to improve output current.
As shown in Figure 2, rectification circuit 3 and DC/DC change-over circuit 2 are arranged in housing 5, the load circuit 8 of rectification circuit is serially connected with current-limiting resistance and light emitting diode string 6, silicon photocell group 4 is arranged on the light emission direction of light emitting diode string 6, the voltage output end of silicon photocell group 4 is electrically connected with the input of DC/DC change-over circuit 2, and the output of DC/DC change-over circuit 2 is electrically connected with the DC/DC voltage output end 7 of housing 5.Rectification circuit 3 is bridge rectifiers 1, the number of the light emitting diode string 6 of load circuit 8 serial connections of bridge rectifier 1 is to determine according to DC/DC output current and voltage, embodiment 2 is common rectification two utmost points with the rectifier diode that is not both rectification circuit 3 of embodiment 1, as 1N4001,1N4007 or the like.
As shown in Figure 3, rectification circuit 3 and DC/DC change-over circuit 2 are arranged in housing 5, the load circuit 8 of rectification circuit is serially connected with current-limiting resistance and light emitting diode string 6, silicon photocell group 4 is arranged on the light emission direction of light emitting diode string 6, silicon photocell group 4 is divided into many groups, being divided into many group silicon photocell groups 4 is electrically connected with the input of a plurality of DC/DC change-over circuits 2 respectively, the output of a plurality of DC/DC change-over circuits 2 is electrically connected with a plurality of DC/DC voltage output ends of housing 5, and a plurality of DC/DC voltage output end electricity altogether.Rectification circuit 3 is bridge rectifiers, and the light-emitting diode number of load circuit 8 serial connections of bridge rectifier is determined according to DC/DC output current and voltage.
As shown in Figure 3, rectification circuit 3 and DC/DC change-over circuit 2 are arranged in housing 5, the load circuit 8 of rectification circuit is serially connected with current-limiting resistance and light emitting diode string 6, silicon photocell group 4 is arranged on the light emission direction of light emitting diode string 6, silicon photocell group 4 is divided into many groups, being divided into many group silicon photocell groups 4 is electrically connected with the input of a plurality of DC/DC change-over circuits 2 respectively, the output of a plurality of DC/DC change-over circuits 2 is electrically connected with a plurality of DC/DC voltage output ends of housing 5, and a plurality of DC/DC voltage output end electricity are not altogether.Rectification circuit 3 is bridge rectifiers, and the light-emitting diode number of load circuit 8 serial connections of bridge rectifier is determined according to DC/DC output current and voltage.
Fig. 4 is silicon photocell group and the light emitting diode string distribution map that multilayer distributes.Housing 5 one sides are rectification circuits 3, and opposite side is a DC/DC change-over circuit 2, and the centre is a silicon photocell group 4, and silicon photocell group 4 is divided into many groups, organizes silicon photocell group 4 layer distributed more, and light emitting diode string 6 is arranged between the layering, to reduce area, improve output current.
Claims (5)
1. one kind big electric current is exported the method for designing that photoelectricity is isolated ac-dc switching power, it is characterized in that: rectification circuit and DC/DC change-over circuit are arranged in housing, the load circuit of rectification circuit is serially connected with current-limiting resistance R0 and light emitting diode string, the silicon photocell group is arranged on the light emission direction of light emitting diode string, the voltage output end of silicon photocell group is electrically connected with the input of DC/DC change-over circuit, and the output of DC/DC change-over circuit is electrically connected with the DC/DC voltage output end of housing.
2. a kind of big electric current output photoelectricity according to claim 1 is isolated the method for designing of ac-dc switching power, it is characterized in that: the light emitting diode string number of rectification circuit load circuit serial connection is according to the output current and the voltage parameter decision of DC/DC change-over circuit.
3. a kind of big electric current output photoelectricity according to claim 1 is isolated the method for designing of ac-dc switching power, and it is characterized in that: the rectifier diode of rectification circuit is a light-emitting diode.
4. a kind of big electric current output photoelectricity according to claim 1 is isolated the method for designing of ac-dc switching power, and it is characterized in that: rectification circuit is bridge rectifier or semibridge system rectification circuit.
5. a kind of big electric current output photoelectricity according to claim 1 is isolated the method for designing of ac-dc switching power, it is characterized in that: the silicon photocell component becomes many groups, being divided into many group silicon photocell groups is electrically connected with the input of a plurality of DC/DC change-over circuits respectively, the output of a plurality of DC/DC change-over circuits is electrically connected with a plurality of DC/DC voltage output ends of housing, and a plurality of DC/DC voltage output ends are not altogether or not altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010582638 CN102005946A (en) | 2010-12-10 | 2010-12-10 | Design method of high-current output photoelectric isolation AC/DC conversion power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010582638 CN102005946A (en) | 2010-12-10 | 2010-12-10 | Design method of high-current output photoelectric isolation AC/DC conversion power supply |
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| Publication Number | Publication Date |
|---|---|
| CN102005946A true CN102005946A (en) | 2011-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010582638 Pending CN102005946A (en) | 2010-12-10 | 2010-12-10 | Design method of high-current output photoelectric isolation AC/DC conversion power supply |
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| CN (1) | CN102005946A (en) |
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2010
- 2010-12-10 CN CN 201010582638 patent/CN102005946A/en active Pending
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Application publication date: 20110406 |